JP4221625B2

JP4221625B2 - One-way clutch

Info

Publication number: JP4221625B2
Application number: JP16424398A
Authority: JP
Inventors: 励菊島
Original assignee: TOK Bearing Co Ltd
Current assignee: TOK Bearing Co Ltd
Priority date: 1998-05-28
Filing date: 1998-05-28
Publication date: 2009-02-12
Anticipated expiration: 2018-05-28
Also published as: JPH11336797A

Description

【０００１】
【発明の属する技術分野】
本発明は、回転軸が一方向に回転しようとするときはこれがロックされて（緊締作用を受けて）ギア等の作動部品との間のトルク伝達が可能となり、回転軸が逆方向に回転しようとするときはこれが空転して（軸受け作用を受けて）作動部品との間のトルク伝達ができないクラッチ機能を備えた一方向クラッチであって、回転軸が軸通孔に嵌入されていないときは、各ニードルはバネ手段から付勢力を受けない状態にあると共に、ニードルが収容される溝内から回転軸の方へと抜け落ちない一方向クラッチに関する。
【０００２】
【従来の技術】
図６に示すように、従来の一方向クラッチは、リング状部材２とそのリング内に嵌入された保持部材１を備える。図６（ａ）は一方向クラッチの部分平面図であり、同図（ｂ）は同（ａ）のＤ−Ｄ線に沿った部分断面図である。保持部材１には、軸方向において各ニードル３を保持する溝であって回転軸７側が開口した各保持溝４と、これらの各保持溝４に隣接すると共に内部に各板バネ５を収容する各バネ溝６が設けられている。各板バネ５は各バネ溝６の内壁面と一体となっている。
図６は回転軸７が保持部材１の軸通孔１１に嵌入されていない状態を示すものであり（回転軸７は図中鎖線で示してある）、各ニードル３は、各板バネ５の付勢力によりリング状部材２の内面２１に押し付けられている。
このような種類の一方向クラッチは、例えば、特公平６−６５９００号公報等に示されている。
【０００３】
上述のようなクラッチは、保持部材１の各保持溝４内にニードル３を１つずつ予め収容しておき、次いで保持部材１の軸通孔１１に回転軸７を嵌入する工程を経て組立てられる。この組立工程中において、回転軸７が嵌入された後の段階においては勿論のことであが、回転軸７が嵌入される前の段階においても各ニードル３は常に各バネ５により付勢力を受けている。
【０００４】
【発明が解決しようとする課題】
しかしながら、このようなクラッチでは、回転軸が嵌入される前の段階においてもバネの付勢力が常にニードルに作用しているので、例えば、軸通孔に回転軸を嵌入する組立工程中に、ニードルが誤って保持溝内から飛び出したり、バネ自身がバネ溝内から誤って飛び出したり、バネ自身が押しつぶされたりして破損する不都合があり、組立作業が困難であった。
さらに、回転軸が嵌入される前の段階においても常にバネの付勢力が作用しているので、バネの弾性性能が早く低下してしまうという問題もあった。
また、ニードルの外径よりも保持溝の回転軸側の開口幅の方が大きいため、軸通孔に回転軸を嵌入していない場合には、ニードルがこの開口から容易に抜け出でしまう問題もあった。
【０００５】
そこで、組立作業が容易で、組立工程中にバネが破損することがなく、またニードルが保持溝の回転軸側の開口から容易に抜け出ることがなく、さらにバネの弾性性能の劣化が遅い一方向クラッチが望まれていた。
【０００６】
【課題を解決するための手段】
上記課題を解決するために本発明の一方向クラッチは、請求項１において、
回転軸を嵌入するための軸通孔を中心に備え、前記軸通孔を囲むようにして所定間隔をもって軸方向に突設した複数の突設柱を有する保持部材であって、各突設柱が周方向において第１の側面と第２の側面とを備え、前記第１の側面がこれに隣接する突設柱の前記第２の側面と対向するように配設されている、プラスチック製の保持部材と、
前記複数の突設柱を外側から囲み、前記保持部材と相対回転しないリング状部材と、
隣接する前記突設柱の一方の第１の側面と他方の第２の側面との間に形成される保持溝と、
前記保持溝内において軸方向に保持され、前記軸通孔に嵌入された前記回転軸と軸方向に接するニードルと、
前記突設柱の第１の側面からこれと隣接する突設柱の第２の側面へ向けて延出するプラスチック製のバネ手段とを備え、
前記ニードルが前記保持溝内で前記第１の側面側に移動する方向に前記回転軸が回転する際には軸受け作用が働き、前記ニードルが前記保持溝内で前記第２の側面側に移動する方向に前記回転軸が回転する際には緊締作用が働く一方向クラッチにおいて、
前記ニードルは前記保持溝内に保持されており、前記軸通孔には前記回転軸が挿入されておらず、前記バネ手段の付勢力が前記ニードルに作用しない状態にあるときに、前記ニードルの外径をＤとし、隣接する前記突設柱の内面間の距離をＬとし、前記ニードルが前記保持溝内を前記バネ手段の延出方向に沿って移動可能な距離をδとしたとき、下記（１）式を満たすことを特徴とする。
Ｌ<Ｄ<Ｄ＋δ （１）
【０００７】
これにより、回転軸が軸通孔に嵌入されていないときは、各ニードルは保持溝内に設けられたバネ手段により付勢力を受けない。また、回転軸が軸通孔内に嵌入されていない状態であっても、ニードルが突設柱の内面間から抜け出ない。
【０００８】
請求項２では、保持部材とバネ手段を一体成形体としたことにより、保持部材とバネ手段を同時にかつ容易に成形することができる。
【０００９】
請求項３では、リング状部材の内面を保持部材の突設柱の外面に対して軸方向の略全長に亘って回り止め形状にするとともに、請求項４では、この形状を多角形とし、保持部材の突設柱の外面をこれと相補的な形状とした。これにより、リング状部材が保持部材と相対回転しないように双方を係合させるための係合部材等を必要としない。
【００１０】
請求項５では、保持部材は突設柱が突設された本体を有し、該本体は突設柱が突設された面に係合突起を備え、リング状部材は外面に保持部材本体の係合突起と係合する切欠を備えた構成としたことにより、リング状部材は保持部材により確実に保持される。
【００１１】
【発明の実施の形態】
本発明の実施の形態の一例について添付した図面に基づき説明する。ここで、図１は本発明の一方向クラッチの分解斜視図、図２〜図４の各（ａ）は本発明の一方向クラッチの部分平面図、図２〜図４の各（ｂ）は対応する各（ａ）の破線に沿った部分断面図である。また、図２は回転軸が保持部材の軸通孔に嵌入されていない状態を示し、図３は軸通孔に嵌入した回転軸を同図（ａ）において時計回りに回転させた状態を示し、図４は軸通孔に嵌入した回転軸を同図（ａ）において反時計回りに回転させた状態を示す。
【００１２】
図１〜図４に示すように、本発明に係る一方向クラッチは、金属製のリング状部材２とそのリング内に嵌入されるプラスチック製の保持部材１を備える。
保持部材１は、回転軸７を嵌入するための軸通孔１１を中心に備える円形台座の本体１０と、この本体１０の一方の端面の軸通孔１１の周囲から軸方向に突設する複数の突設柱１２を備える。これら突設柱１２は、所定の間隔をもって前記軸通孔１１を取り囲むように配置され、その内面１２ａが軸通孔１１の内周面と軸方向においてほぼ面一となっている。
保持部材１の本体１０の前記端面の外縁部には、複数の係合突起１３が等間隔に設けられており、一方、リング状部材２の外面２２には軸方向に沿って伸延する複数の切欠２３が周方向に沿って等間隔に形成されている。突設柱１２部分がリング状部材２のリング内に嵌入された状態においては、各突設柱１２の外面１２ｂはリング状部材２の内面２１に接しつつ、保持部材１の本体１０の係合突起１３がリング状部材２の外面２２の切欠２３と複数箇所で係合することにより、リング状部材２は保持部材１によって支持される。
【００１３】
突設柱１２は、その外面１２ｂがリング状部材２の内面２１の一部と相補的な形状をなし、回転軸７に接する内面１２ａは回転軸７の周面の一部と相補的な形状をなし、周方向に位置する側面のうちバネが設けられていない第２の側面１２ｃはニードル３のほぼ半周面と相補的な形状をし、バネ５が設けられている第１の側面１２ｄはバネを収容するための隙間部分を形成すべく切欠き形状をなす。
【００１４】
リング状部材２と保持部材１は相対回転しないように一体的に構成されており、リング状部材２の内面２１は多角形（図では６角形を示す）の回り止め形状をなす。なお、リング状部材２の内面２１を多角形状とせずに円形とし、突設柱１２の外面１２ｂとリング状部材２の内面２１に凹凸部をそれぞれ設けて、両者を相対回転不能に係合してもよい。
【００１５】
保持部材１の突設柱１２、１２間の隙間が、軸方向においてニードル３を１本ずつ保持するための保持溝４を形成している。各ニードル３は、この保持溝４内に遊嵌されるように保持される。各ニードル３は、周面が円滑なローラ形状をなす。
【００１６】
各保持溝４内にあって、ニードル３が収容される部分と周方向において対向する側の部分には、ニードル３をリング状部材２の内面２１に向けて付勢するための板バネ５が、突設柱１２の第１の側面１２ｄの下部に一体的に設けられている。板バネ５は、前記側面１２ｄの下部からニードル３に向けて図中上方に延出しており、上方の先端に近い部分ほどニードル３に接近するように、かつ、ニードル３に接したときに付勢力がこれに充分に作用するように下方から上方に向けて下側に湾曲している。板バネ５の形状としては、図のように、Ｖ字形の左半分の湾曲片だけでなく、波型湾曲片など特に限定されるものではない。
【００１７】
以上のように構成された一方向クラッチにおいては、図２（ａ）に示すように、各ニードル３の外径をＤとし、隣接する突設柱１２、１２の内面１２ａ、１２ａ間の距離をＬとし、各保持溝４内においてニードル３がバネ手段５の延出方向に沿って移動可能な距離をδとしたとき、Ｄ、Ｌ、δが下記（１）式を満たす関係にある。
Ｌ<Ｄ≦Ｄ＋δ （１）
【００１８】
ここで、式（１）中のＤ+δについて説明を加える。図２（ａ）に示すニードル３は、その図中左下部を図中左側の突設柱１２の第２の側面１２ｃの内面付近に接すると共に、その図中上部をリング状部材２の内面２１に接している（「位置１」とする）。したがって、このニードル３はもはやこれ以上図中左側には移動できない。一方、このニードル３はその図中右側部分を板バネ５に丁度接する位置（「位置２」とする）まで図中右側に移動可能である。図２（ａ）では、回転軸７が軸通孔１１内に嵌入されていないので、このニードル３は何らかの外力が作用しない限り、位置２より図中右側には移動することはない（更に右側に移動するには板バネ５の付勢力に抗して移動しなければならないので、）。すなわち、ニードル３は外力が作用しない限りは上記位置１と位置２の間で移動可能である。
したがって、式（１）中のＤ+δは、ニードル３の外径と、ニードル３がバネ手段５の延出方向に沿った線Ｍ上を上記位置１から位置２に移動する距離との和として与えられるものである。
【００１９】
この式（１）の意味するところは、以下の通りである。
まず、ニードル３の外径Ｄが隣接する突設柱１２、１２同士の内面１２ａ、１２ａ間の距離Ｌより小さいことから、回転軸７が軸通孔１１内に嵌入されていない状態であっても、ニードル３が突設柱１２、１２の内面１２ａ、１２ａ間から抜け出るようなことがない。
次に、各保持溝４内において各ニードル３が各バネ手段５の延出方向に移動可能な距離δを設けたことにより、回転軸７が軸通孔１１に嵌入されていないときは、各ニードル３は保持溝４内に設けられた板バネ５により付勢力を受けることがない。したがって、バネの弾性性能の早期低下を防止できる。
【００２０】
保持部材１の材質はプラスチックに限定されるものではなく、金属やセラミックス等を用いてもい。
バネ手段は保持部材と一体に成形したものでなくこれと別体としてもよい。別体とする場合には、バネ手段は保持部材と異なる材質であっても同じ材質であってもよく、例えばプラスチック、金属、セラミックス等を用いることができる。また、保持部材と一体又は別体であるに拘わらず、バネ手段としては板バネに限定されるものでなくコイルバネ等を用いてもよい。しかしながら、製造の容易性、低コスト化等の理由から、バネ手段と保持部材には材質としてプラスチックを用い、バネ手段を板バネとしてこれらを射出成型法によって一体成形するのが好ましい。
また、リング状部材２もその材質を特に限定されるものではなく、金属、プラスチック、セラミックスなどが用いられるが、強度の観点から金属製であるのが好ましい。
【００２１】
保持部材１は、後述の作動部品と係合するための凸条１４を備える。この凸条１４は本体１０の軸方向の他端側に周方向に沿って形成されている。
リング状部材２もまた、上述した外面２２の周方向に沿って等間隔に設けた複数の切欠２３によりこの作動部品と係合するようになっている。
【００２２】
次に、本発明に係る一方向クラッチの作用について説明する。
図２（ａ）、（ｂ）は、回転軸７が保持部材１の軸通孔１１に嵌入されていない状態を示す。図から明らかなように、この状態では板バネ５とニードル３との間には僅かな隙間が存在し、板バネはフリーな状態にある。板バネ５はニードル３に接触しないので、板バネ５の付勢力はニードル３に作用しない。図２（ｂ）は同（ａ）のＡ−Ａ線に沿った断面図である。
なお、図２では、板バネ５とニードル３との間に僅かな隙間が存在する場合について述べたが、ニードル３に板バネ５の付勢力が作用していなければ、両者が接していてもよい。
【００２３】
前述のように、Ｄ、Ｌ、δを上記式（１）のように設定してあるので、組立工程において回転軸７が保持部材１の軸通孔１１に嵌入される前には、板バネ５の付勢力がニードル３に作用せず、板バネ５の弾性性能が早く低下してしまうということがなく、ニードル３が突設柱１２、１２の内面１２ａ、１２ａ間から抜け出るようなこともない。また、板バネ５がフリー状態にあるので組立作業も容易である。
【００２４】
すなわち、組立工程中において、もしも板バネ５がニードル３に付勢力を作用していると、例えば、回転軸７が軸通孔１１に嵌入される際にニードル３に強く接触したときに、それによってニードル３が保持溝４から飛び出したりする不都合や（コイルバネ等のバネ手段５が保持部材１と一体に成形したものでなくこれと別体である場合には、ニードル３の保持溝４からの飛び出しに引きずられて、バネ手段５も保持溝４内から誤って飛び出したりする不都合もある）、また、回転軸７とリング状部材２の内面２１の間で板バネ５が押しつぶされたりする危険性があった。しかしながら、板バネ５がフリー状態なので、このような不都合や危険性を回避することができる。
また、上記式（１）に示すように、ニードル３の外径と、ニードル３がバネ手段５の延出方向に沿った線Ｍ上を上記位置１から位置２に移動する距離との和として与えられるＤ+δは、ニードル３の外径Ｄより大きいので、ニードル３を保持溝４内に挿入する際にニードル３がバネ手段５によって干渉されない利点がある。さらに、ニードル３を保持溝４内に挿入した後であって、回転軸７を軸通孔１１に挿入する前においては、保持溝４の軸方向の開口を下方に向けない限りニードル３が保持溝４から抜け出ることがない利点もある。
【００２５】
図３（ａ）は、軸通孔１１に嵌入した回転軸７を図中時計方向に回転させた状態を示す部分平面図であり、同図（ｂ）は同（ａ）のＢ−Ｂ線に沿った部分断面図である。回転軸７を図３（ａ）の矢印で示す図中時計方向に回転させると、各保持溝４内に収容された各ニードル３は、板バネ５の付勢力に抗しつつ回転軸７の回転に引き連れられるようにして保持溝４内を同図の図中右方向に移動する。
【００２６】
その結果、リング状部材２の内面２１とニードル３の外周面との係合による緊締状態が、回転軸７の回転を阻止する程に強固でないため、リング状部材２と回転軸７とは相対的に回転可能となる。すなわち、リング状部材２に取付けた後述の作動部品と回転軸７のいずれか一方を回転しないように固定して他方を回転させるとこの他方は空転するので、作動部品と回転軸７の間でトルクが伝達されないようにすることができる。
なお、図では、リング状部材２の内面２１とニードル３の外周面とが接している状態を示したが、両者が離間して係合状態にない場合においても、勿論同様の効果が得られる。
【００２７】
一方、図４（ａ）は、軸通孔１１に嵌入した回転軸７を図中矢印で示す反時計方向に回転させた状態を示す部分断面図であり、同図（ｂ）は同（ａ）のＣ−Ｃ線に沿った部分平面図である。回転軸７を図４（ａ）の図中反時計方向に回転させると、各保持溝４内に収容された各ニードル３は、板バネ５に付勢されつつ回転軸７の回転に引き連れられるようにして保持溝４内を同図の図中左方向に移動する。
【００２８】
その結果、ニードル３はリング状部材２の内面２１に押し当てられ、リング状部材２の内面２１とニードル３の外周面との係合による緊締状態が、回転軸７の回転を阻止する程に強固であるため、リング状部材２に取付けた作動部品と回転軸７とは相対的に回転不能となるので両者の間でトルク伝達が可能となる。
【００２９】
図５は、以上のようにして構成された本発明に係る一方向クラッチを取付ける作動部品の断面斜視図を示す。作動部品は、クラッチを内部に嵌入する外筒体８と、これと一体に成形されたギア、プーリ等のトルク伝達部材９からなる。
外筒体８の内部空間８３の内周面には、リング状部材２の外面２２の切欠２３とに係合するための係合突条８１が設けられている。また外筒体８の一方の開口端には、保持部材１の凸条１４を嵌入してこれと係合するための係合溝８２が設けられている。これらの係合を用いて、本発明の一方向クラッチが外筒体８の内部空間８３に組付けられる。なお、外筒体８の中心に設けられた軸通孔８４は、前記回転軸７を通すためのものである。
このようにして組付けられたクラッチでは、上記図３で示される回転軸が作動部品に対して空転するときには、回転軸からギア等へトルクが伝達されず、上記図４で示される回転軸が作動部品に対してロックされるときには、回転軸からギア等へトルクが伝達される。
【００３０】
【発明の効果】
以上のように本発明の一方向クラッチは、請求項１において、
回転軸を嵌入するための軸通孔を中心に備え、前記軸通孔を囲むようにして所定間隔をもって軸方向に突設した複数の突設柱を有する保持部材であって、各突設柱が周方向において第１の側面と第２の側面とを備え、前記第１の側面がこれに隣接する突設柱の前記第２の側面と対向するように配設されている、保持部材と、
前記複数の突設柱を外側から囲み、前記保持部材と相対回転しないリング状部材と、
隣接する前記突設柱の一方の第１の側面と他方の第２の側面との間に形成される保持溝と、
前記保持溝内において軸方向に保持され、前記軸通孔に嵌入された前記回転軸と軸方向に接するニードルと、
前記突設柱の第１の側面からこれと隣接する突設柱の第２の側面へ向けて延出するバネ手段とを備え、
前記ニードルが前記保持溝内で前記第１の側面側に移動する方向に前記回転軸が回転する際には軸受け作用が働き、前記ニードルが前記保持溝内で前記第２の側面側に移動する方向に前記回転軸が回転する際には緊締作用が働く一方向クラッチにおいて、
前記ニードルの外径をＤとし、隣接する前記突設柱の内面間の距離をＬとし、前記バネ手段がフリー状態にあるときに前記ニードルが前記保持溝内を前記バネ手段の延出方向に沿って移動可能な距離をδとしたとき、下記（１）式を満たすことを特徴とする。
Ｌ<Ｄ≦Ｄ＋δ （１）
【００３１】
これにより、回転軸が軸通孔に嵌入されていないときは、各ニードルは保持溝内に設けられたバネにより付勢力を受けない。また、回転軸が軸通孔内に嵌入されていない状態であっても、ニードルが突設柱の内面間から抜け出ない。
その結果、組立工程中において回転軸が軸通孔に嵌入される前の段階では、バネ手段がニードルを付勢することがないので、例えば、回転軸を軸通孔に嵌入する際に回転軸がニードルやバネ手段に強く接触しても、バネ手段が保持溝内から誤って飛び出したり、ニードルが誤って保持溝内から飛び出したり、バネ手段が回転軸とリング状部材の内面との間で押しつぶされたりする危険性がない。さらに、回転軸が嵌入される前の段階においてはバネの付勢力が作用していないので、バネの弾性性能が早く低下するようなことはなく、バネの寿命の長期間化が図られる。
【００３２】
請求項２では、バネ手段を突設柱の側面に一体に形成することにより、例えばコイルバネや板バネなどのバネ手段を保持部材と別途に設ける必要がなくなり、クラッチの構成部品の数を減らすことができるので、クラッチの製造コストの低減が可能となる。
【００３３】
請求項３では、保持部材と射出成型によるプラスチックの一体成形体とした。プラスチックの射出成型法を用いることにより、保持部材とバネ手段を容易に一体成形できる。
【００３４】
請求項４では、リング状部材の内面を保持部材に対して回り止め形状とするようにしたので、リング状部材が保持部材と共に回転しないように双方を係合するための係合部材等が不要となりクラッチ構造を簡略化できる。その結果、クラッチの構成部品の数を減らすことができるので、クラッチの製造コストの低減が可能となる。
【図面の簡単な説明】
【図１】本発明の一方向クラッチの分解斜視図。
【図２】（ａ）は、本発明の一方向クラッチの、回転軸が保持部材の軸通孔に嵌入されていない状態を示す部分平面図、（ｂ）は（ａ）のＡ−Ａ線に沿った部分断面図。
【図３】（ａ）は、本発明の一方向クラッチの、軸通孔に嵌入した回転軸をトルクが伝達されない方向に回転させた状態を示す部分平面図、（ｂ）は（ａ）のＢ−Ｂ線に沿った部分断面図。
【図４】（ａ）は、本発明の一方向クラッチの、軸通孔に嵌入した回転軸をトルクが伝達される方向に回転させた状態を示す部分平面図、（ｂ）は（ａ）のＣ−Ｃ線に沿った部分断面図。
【図５】本発明に係る一方向クラッチを取付ける作動部品を示す断面斜視図。
【図６】（ａ）は、従来の一方向クラッチの、回転軸が保持部材の軸通孔に嵌入されていない状態を示す部分平面図、（ｂ）は（ａ）のＤ−Ｄ線に沿った部分断面図。
【符号の説明】
１・・保持部材、２・・リング状部材、３・・ニードル、４・・保持溝、５・・バネ手段、７・・回転軸、１１・・軸通孔、１２・・突設柱、１２ｃ・・第２の側面、１２ｄ・・第１の側面、Ｄ・・ニードルの外径、Ｌ・・隣接する突設柱の内面間の距離、δ・・バネ手段がフリー状態にあるときにニードルが保持溝内でバネ手段の延出方向に沿って移動可能な距離。[0001]
BACKGROUND OF THE INVENTION
According to the present invention, when the rotating shaft tries to rotate in one direction, the rotating shaft is locked (receives a tightening action), and torque can be transmitted between the rotating parts such as gears, and the rotating shaft rotates in the opposite direction. When this is a one-way clutch that has a clutch function that is idle (received a bearing action) and cannot transmit torque between the operating parts, and the rotary shaft is not inserted into the shaft hole Further, the present invention relates to a one-way clutch in which each needle is in a state in which it does not receive an urging force from a spring means, and does not fall out from a groove in which the needle is accommodated toward the rotating shaft.
[0002]
[Prior art]
As shown in FIG. 6, the conventional one-way clutch includes a ring-shaped member 2 and a holding member 1 fitted in the ring. FIG. 6A is a partial plan view of the one-way clutch, and FIG. 6B is a partial cross-sectional view taken along the line DD of FIG. The holding member 1 is a groove that holds each needle 3 in the axial direction and is open on the rotary shaft 7 side, and is adjacent to each holding groove 4 and accommodates each leaf spring 5 therein. Each spring groove 6 is provided. Each leaf spring 5 is integrated with the inner wall surface of each spring groove 6.
FIG. 6 shows a state in which the rotating shaft 7 is not inserted into the shaft through hole 11 of the holding member 1 (the rotating shaft 7 is indicated by a chain line in the drawing), and each needle 3 is connected to each leaf spring 5. It is pressed against the inner surface 21 of the ring-shaped member 2 by the urging force.
Such a one-way clutch is disclosed in, for example, Japanese Patent Publication No. 6-65900.
[0003]
The clutch as described above is assembled through a process in which one needle 3 is stored in advance in each holding groove 4 of the holding member 1 and then the rotary shaft 7 is fitted into the shaft through hole 11 of the holding member 1. . In this assembly process, as a matter of course, at the stage after the rotary shaft 7 is inserted, each needle 3 always receives the urging force from each spring 5 even before the rotary shaft 7 is inserted. ing.
[0004]
[Problems to be solved by the invention]
However, in such a clutch, since the biasing force of the spring always acts on the needle even before the rotating shaft is inserted, for example, during the assembly process of inserting the rotating shaft into the shaft through hole, the needle However, there is an inconvenience that the spring is accidentally jumped out of the holding groove, the spring itself is accidentally jumped out of the spring groove, or the spring itself is crushed and damaged, and the assembling work is difficult.
Furthermore, since the biasing force of the spring is always acting even before the rotating shaft is inserted, there is a problem that the elastic performance of the spring is quickly deteriorated.
Further, since the opening width of the holding groove on the rotating shaft side is larger than the outer diameter of the needle, there is a problem that the needle can easily come out from this opening when the rotating shaft is not inserted into the shaft through hole. there were.
[0005]
Therefore, the assembly work is easy, the spring does not break during the assembly process, the needle does not easily come out of the opening on the rotating shaft side of the holding groove, and the elastic performance of the spring deteriorates slowly. A clutch was desired.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the one-way clutch of the present invention is as follows.
A holding member having a plurality of projecting columns provided in the axial direction with a predetermined interval so as to surround the shaft through hole, and having a shaft through hole for inserting a rotation shaft. A plastic holding member having a first side surface and a second side surface in a direction, the first side surface being disposed so as to face the second side surface of the projecting pillar adjacent to the first side surface When,
A ring-shaped member that surrounds the plurality of protruding columns from the outside and does not rotate relative to the holding member;
A holding groove formed between one first side surface and the other second side surface of the adjacent protruding pillars;
A needle held in the holding groove in the axial direction and in contact with the rotating shaft fitted in the shaft through hole in the axial direction;
A spring means made of plastic extending from the first side surface of the protruding column toward the second side surface of the protruding column adjacent thereto,
When the rotary shaft rotates in a direction in which the needle moves to the first side surface in the holding groove, a bearing action is exerted, and the needle moves to the second side in the holding groove. In the one-way clutch in which the tightening action works when the rotating shaft rotates in the direction,
The needle is held in the holding groove, and the rotating shaft is not inserted into the shaft through hole, and when the urging force of the spring means does not act on the needle, When the outer diameter is D, the distance between the inner surfaces of the adjacent protruding columns is L, and the distance that the needle can move in the holding groove along the extending direction of the spring means is δ, The expression (1) is satisfied.
L <D <D + δ (1)
[0007]
Thereby, when the rotating shaft is not fitted in the shaft through hole, each needle does not receive a biasing force by the spring means provided in the holding groove. Further, even if the rotating shaft is not fitted in the shaft through hole, the needle does not come out from between the inner surfaces of the protruding columns.
[0008]
According to the second aspect of the present invention, since the holding member and the spring means are integrally formed, the holding member and the spring means can be simultaneously and easily formed.
[0009]
According to a third aspect of the present invention, the inner surface of the ring-shaped member is formed in a non-rotating shape over substantially the entire length in the axial direction with respect to the outer surface of the protruding column of the holding member. The outer surface of the protruding column of the member was made complementary to this. This eliminates the need for an engaging member or the like for engaging the ring-shaped member with each other so that the ring-shaped member does not rotate relative to the holding member.
[0010]
According to a fifth aspect of the present invention, the holding member has a main body with a protruding column protruding therefrom, the main body has an engaging protrusion on a surface on which the protruding column protrudes, and the ring-shaped member has an outer surface of the holding member main body. With the configuration including the notch that engages with the engaging protrusion, the ring-shaped member is securely held by the holding member.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
An exemplary embodiment of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is an exploded perspective view of the one-way clutch of the present invention, each (a) of FIGS. 2 to 4 is a partial plan view of the one-way clutch of the present invention, and each (b) of FIGS. It is a fragmentary sectional view in alignment with the broken line of each corresponding (a). 2 shows a state in which the rotating shaft is not inserted into the shaft through hole of the holding member, and FIG. 3 shows a state in which the rotating shaft inserted into the shaft through hole is rotated clockwise in FIG. FIG. 4 shows a state in which the rotating shaft fitted in the shaft through hole is rotated counterclockwise in FIG.
[0012]
As shown in FIGS. 1 to 4, the one-way clutch according to the present invention includes a metal ring-shaped member 2 and a plastic holding member 1 fitted into the ring.
The holding member 1 has a plurality of circular pedestal main body 10 provided around a shaft through hole 11 into which the rotary shaft 7 is fitted, and a plurality of axially projecting from the periphery of the shaft through hole 11 on one end face of the main body 10. The protruding column 12 is provided. These protruding columns 12 are arranged so as to surround the shaft through hole 11 with a predetermined interval, and the inner surface 12a thereof is substantially flush with the inner peripheral surface of the shaft through hole 11 in the axial direction.
A plurality of engaging projections 13 are provided at equal intervals on the outer edge portion of the end surface of the main body 10 of the holding member 1, while a plurality of extending projections along the axial direction are provided on the outer surface 22 of the ring-shaped member 2. The notches 23 are formed at equal intervals along the circumferential direction. In a state where the protruding column 12 portion is fitted in the ring of the ring-shaped member 2, the outer surface 12 b of each protruding column 12 is in contact with the inner surface 21 of the ring-shaped member 2, while the main body 10 of the holding member 1 is engaged. The ring-shaped member 2 is supported by the holding member 1 by engaging the protrusions 13 with the notches 23 of the outer surface 22 of the ring-shaped member 2 at a plurality of locations.
[0013]
The projecting column 12 has an outer surface 12 b that is complementary to a part of the inner surface 21 of the ring-shaped member 2, and an inner surface 12 a that is in contact with the rotating shaft 7 is complementary to a part of the peripheral surface of the rotating shaft 7. The second side surface 12c provided with no spring among the side surfaces located in the circumferential direction has a shape complementary to the substantially half-circumferential surface of the needle 3, and the first side surface 12d provided with the spring 5 is A notch shape is formed to form a gap for accommodating the spring.
[0014]
The ring-shaped member 2 and the holding member 1 are integrally configured so as not to rotate relative to each other , and the inner surface 21 of the ring-shaped member 2 has a polygonal shape (indicated by a hexagon in the drawing). In addition, the inner surface 21 of the ring-shaped member 2 is made circular instead of polygonal, and an uneven portion is provided on each of the outer surface 12b of the protruding column 12 and the inner surface 21 of the ring-shaped member 2 so that they are engaged with each other so as not to be relatively rotatable. May be.
[0015]
A gap between the protruding columns 12 and 12 of the holding member 1 forms a holding groove 4 for holding the needles 3 one by one in the axial direction. Each needle 3 is held so as to be loosely fitted in the holding groove 4. Each needle 3 has a roller shape with a smooth peripheral surface.
[0016]
A leaf spring 5 for urging the needle 3 toward the inner surface 21 of the ring-shaped member 2 is provided in each holding groove 4 and on a portion facing the portion in which the needle 3 is accommodated in the circumferential direction. The projection column 12 is integrally provided at the lower portion of the first side surface 12d. The leaf spring 5 extends upward in the figure from the lower portion of the side surface 12d toward the needle 3, and is attached so that the portion closer to the upper tip approaches the needle 3 and comes into contact with the needle 3. It is curved downward from the bottom to the top so that the force acts sufficiently on this. As shown in the figure, the shape of the leaf spring 5 is not limited to a V-shaped left half curved piece but also a wave shaped curved piece.
[0017]
In the one-way clutch configured as described above, as shown in FIG. 2A, the outer diameter of each needle 3 is D, and the distance between the inner surfaces 12a, 12a of the adjacent protruding columns 12, 12 is set to be the distance between the inner surfaces 12a, 12a. is L, when the the movable distance [delta] in the extending direction of the two Doru 3 governors Ne means 5 Te respective holding grooves 4 in odor, D, L, δ is the relationship satisfying the following formula (1) is there.
L <D ≦ D + δ (1)
[0018]
Here, D + δ in formula (1) will be described. The needle 3 shown in FIG. 2A is in contact with the inner surface of the second side surface 12c of the protruding column 12 on the left side in the drawing, and the upper portion in the drawing is the inner surface 21 of the ring-shaped member 2 in the drawing. (Referred to as “position 1”). Therefore, this needle 3 can no longer move to the left in the figure. On the other hand, the needle 3 can move to the right side in the drawing to the position where the right side portion in the drawing is just in contact with the leaf spring 5 (referred to as “position 2”). In FIG. 2A, since the rotating shaft 7 is not fitted in the shaft through hole 11, the needle 3 does not move from the position 2 to the right side in the drawing unless any external force is applied (further right side). Since it must move against the urging force of the leaf spring 5 to move to). That is, the needle 3 as long as no external force acts is movable between the positions 1 and 2.
Therefore, D + δ in equation (1) is the sum of the outer diameter of the needle 3 and the distance that the needle 3 moves from the position 1 to the position 2 on the line M along the extending direction of the spring means 5. Is given as
[0019]
The meaning of this formula (1) is as follows.
First, since the outer diameter D of the needle 3 is smaller than the distance L between the inner surfaces 12a, 12a of the adjacent protruding columns 12, 12, the rotary shaft 7 is not inserted into the shaft hole 11. However, the needle 3 does not come out from between the inner surfaces 12a, 12a of the protruding columns 12, 12.
Next, by providing a distance δ in which each needle 3 can move in the extending direction of each spring means 5 in each holding groove 4, when the rotary shaft 7 is not fitted in the shaft through hole 11, The needle 3 does not receive an urging force by the leaf spring 5 provided in the holding groove 4. Therefore, the early fall of the elastic performance of a spring can be prevented.
[0020]
The material of the holding member 1 is not limited to plastic, and metal or ceramics may be used.
The spring means is not formed integrally with the holding member but may be a separate body. In the case of a separate body , the spring means may be made of a different material or the same material as the holding member. For example, plastic, metal, ceramics or the like can be used. In addition, the spring means is not limited to the leaf spring, but may be a coil spring or the like, regardless of whether it is integral with or separate from the holding member. However, for reasons of ease of manufacture, cost reduction, etc., it is preferable to use plastic as the material for the spring means and the holding member, and integrally form them by injection molding using the spring means as a leaf spring.
Further, the material of the ring-shaped member 2 is not particularly limited, and metal, plastic, ceramics, or the like is used, but metal is preferable from the viewpoint of strength.
[0021]
The holding member 1 includes a ridge 14 for engaging with an operation component described later. The protrusion 14 is formed along the circumferential direction on the other end side of the main body 10 in the axial direction.
The ring-shaped member 2 is also engaged with this operating part by a plurality of notches 23 provided at equal intervals along the circumferential direction of the outer surface 22 described above.
[0022]
Next, the operation of the one-way clutch according to the present invention will be described.
2A and 2B show a state in which the rotating shaft 7 is not inserted into the shaft through hole 11 of the holding member 1. As is apparent from the drawing, in this state, there is a slight gap between the leaf spring 5 and the needle 3, and the leaf spring is in a free state. Since the leaf spring 5 does not contact the needle 3, the urging force of the leaf spring 5 does not act on the needle 3. FIG.2 (b) is sectional drawing along the AA of the same (a).
In FIG. 2, the case where there is a slight gap between the leaf spring 5 and the needle 3 is described. However, if the urging force of the leaf spring 5 does not act on the needle 3, both may be in contact with each other. Good.
[0023]
As described above, since D, L, and δ are set as in the above formula (1), the plate spring is inserted before the rotating shaft 7 is fitted into the shaft hole 11 of the holding member 1 in the assembly process. The urging force of 5 does not act on the needle 3, the elastic performance of the leaf spring 5 does not deteriorate quickly, and the needle 3 may come out from between the inner surfaces 12a, 12a of the projecting columns 12, 12. Absent. Further, since the leaf spring 5 is in a free state, assembly work is also easy.
[0024]
That is, if the leaf spring 5 exerts a biasing force on the needle 3 during the assembly process, for example, when the rotating shaft 7 is strongly contacted with the needle 3 when the rotary shaft 7 is inserted into the shaft through hole 11, Or the needle 3 jumps out of the holding groove 4 (when the spring means 5 such as a coil spring is not formed integrally with the holding member 1 and is separate from the holding member 1 , There is also a problem that the spring means 5 is accidentally jumped out of the holding groove 4 by being dragged by jumping out ), and there is a risk that the leaf spring 5 is crushed between the rotating shaft 7 and the inner surface 21 of the ring-shaped member 2. There was sex. However, since the leaf spring 5 is in a free state, such inconvenience and danger can be avoided.
Further, as shown in the above formula (1), the sum of the outer diameter of the needle 3 and the distance that the needle 3 moves from the position 1 to the position 2 on the line M along the extending direction of the spring means 5. Since the given D + δ is larger than the outer diameter D of the needle 3, there is an advantage that the needle 3 is not interfered by the spring means 5 when the needle 3 is inserted into the holding groove 4. Further, after the needle 3 is inserted into the holding groove 4 and before the rotating shaft 7 is inserted into the shaft through hole 11, the needle 3 is held unless the axial opening of the holding groove 4 is directed downward. There is also an advantage that it does not come out of the groove 4.
[0025]
FIG. 3A is a partial plan view showing a state in which the rotary shaft 7 fitted in the shaft through hole 11 is rotated in the clockwise direction in the drawing, and FIG. 3B is a BB line of FIG. It is a fragmentary sectional view in alignment with. When the rotary shaft 7 is rotated in the clockwise direction indicated by the arrow in FIG. 3A, each needle 3 accommodated in each holding groove 4 resists the urging force of the leaf spring 5 while rotating the rotary shaft 7. The inside of the holding groove 4 is moved in the right direction in FIG.
[0026]
As a result, the tightened state due to the engagement between the inner surface 21 of the ring-shaped member 2 and the outer peripheral surface of the needle 3 is not so strong as to prevent the rotation of the rotating shaft 7. Can be rotated. That is, if one of the later-described working parts attached to the ring-shaped member 2 and the rotating shaft 7 are fixed so as not to rotate and the other is rotated, the other is idled. Torque can be prevented from being transmitted.
In the figure, the inner surface 21 of the ring-shaped member 2 and the outer peripheral surface of the needle 3 are in contact with each other, but the same effect can of course be obtained even when they are separated and not in an engaged state. .
[0027]
On the other hand, FIG. 4A is a partial sectional view showing a state in which the rotating shaft 7 fitted in the shaft through hole 11 is rotated in the counterclockwise direction indicated by an arrow in the drawing, and FIG. It is a fragmentary top view along CC line of FIG. When the rotary shaft 7 is rotated counterclockwise in FIG. 4A, each needle 3 accommodated in each holding groove 4 is urged by the leaf spring 5 and is pulled by the rotation of the rotary shaft 7. In this manner, the inside of the holding groove 4 moves to the left in the figure.
[0028]
As a result, the needle 3 is pressed against the inner surface 21 of the ring-shaped member 2, and the tightening state due to the engagement between the inner surface 21 of the ring-shaped member 2 and the outer peripheral surface of the needle 3 prevents the rotation of the rotating shaft 7. Since it is strong, the operating component attached to the ring-shaped member 2 and the rotary shaft 7 are relatively unrotatable, so that torque can be transmitted between them.
[0029]
FIG. 5 is a cross-sectional perspective view of an operating part for mounting the one-way clutch according to the present invention configured as described above. The operating part includes an outer cylinder body 8 into which the clutch is fitted, and a torque transmission member 9 such as a gear and a pulley formed integrally therewith.
On the inner peripheral surface of the inner space 83 of the outer cylindrical body 8, an engaging protrusion 81 for engaging with the notch 23 of the outer surface 22 of the ring-shaped member 2 is provided. Further, an engagement groove 82 is provided at one open end of the outer cylindrical body 8 for fitting the convex strip 14 of the holding member 1 into engagement therewith. Using these engagements, the one-way clutch of the present invention is assembled in the inner space 83 of the outer cylindrical body 8. The shaft through hole 84 provided in the center of the outer cylinder 8 is for passing the rotating shaft 7.
In the clutch assembled in this way, when the rotating shaft shown in FIG. 3 is idle with respect to the operating part, torque is not transmitted from the rotating shaft to the gear or the like, and the rotating shaft shown in FIG. When the operating part is locked, torque is transmitted from the rotating shaft to a gear or the like.
[0030]
【The invention's effect】
As described above, the one-way clutch of the present invention is as follows.
A holding member having a plurality of projecting columns provided in the axial direction with a predetermined interval so as to surround the shaft through hole, and having a shaft through hole for inserting a rotation shaft. A holding member having a first side surface and a second side surface in a direction, the first side surface being disposed so as to face the second side surface of the projecting pillar adjacent to the first side surface;
A ring-shaped member that surrounds the plurality of protruding columns from the outside and does not rotate relative to the holding member ;
And the coercive Jimizo that will be formed between one first side and the other second side of the projecting columns adjacent,
And Runi Doru be tangent is axially retained, the fitting has been said rotational axis and axially to the shaft hole before Kiho Jimizonai,
And a Luba Ne means issuing extending toward the second side of the projecting column adjacent to it from the first side of the projecting column,
Work the bearing action when the front the rotation axis in a direction yn Doru moves in the first side surface side in the retaining groove is rotated, the second side surface in front yn Doru said retaining groove In the one-way clutch in which the tightening action works when the rotary shaft rotates in the direction of moving to the side,
Before the outer diameter of yn Doru is D, the distance between the inner surfaces of the projecting columns adjacent is L, said spring means before the Kiho Jimizonai before yn Doru previous when in a free state SL when the extending distance movable along the direction of the bar ne means was [delta], and satisfies the following formula (1).
L <D ≦ D + δ (1)
[0031]
Thereby, when the rotating shaft is not fitted in the shaft through hole, each needle does not receive a biasing force by the spring provided in the holding groove. Further, even if the rotating shaft is not fitted in the shaft through hole, the needle does not come out from between the inner surfaces of the protruding columns.
As a result, the spring means does not urge the needle before the rotation shaft is inserted into the shaft through hole during the assembly process. For example, when the rotation shaft is inserted into the shaft through hole, the rotation shaft Even if the needle or spring means is in strong contact, the spring means may accidentally jump out of the holding groove, the needle may accidentally jump out of the holding groove, or the spring means may be between the rotating shaft and the inner surface of the ring-shaped member. There is no danger of being crushed. Further, since the biasing force of the spring is not acting before the rotation shaft is inserted, the elastic performance of the spring is not deteriorated quickly, and the life of the spring is prolonged.
[0032]
In claim 2, by forming the spring means integrally on the side surface of the projecting column, it is not necessary to provide a spring means such as a coil spring or a leaf spring separately from the holding member, thereby reducing the number of components of the clutch. Therefore, the manufacturing cost of the clutch can be reduced.
[0033]
According to a third aspect of the present invention, the holding member and the plastic are integrally formed by injection molding. By using a plastic injection molding method, the holding member and the spring means can be easily integrally formed.
[0034]
According to the fourth aspect of the present invention, the inner surface of the ring-shaped member is formed in a non-rotating shape with respect to the holding member. Thus, the clutch structure can be simplified. As a result, the number of clutch components can be reduced, and the manufacturing cost of the clutch can be reduced.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a one-way clutch of the present invention.
FIG. 2 (a) is a partial plan view showing a state in which the rotating shaft of the one-way clutch of the present invention is not fitted in the shaft through hole of the holding member, and FIG. 2 (b) is a line AA in FIG. FIG.
FIG. 3 (a) is a partial plan view showing a state in which a rotating shaft fitted in a shaft through-hole of a one-way clutch of the present invention is rotated in a direction in which torque is not transmitted, and FIG. The fragmentary sectional view which followed the BB line.
4A is a partial plan view showing a state in which a rotating shaft fitted in a shaft through hole is rotated in a direction in which torque is transmitted in a one-way clutch of the present invention, and FIG. The fragmentary sectional view in alignment with CC line.
FIG. 5 is a cross-sectional perspective view showing an operating part for mounting a one-way clutch according to the present invention.
6A is a partial plan view showing a state in which the rotating shaft of the conventional one-way clutch is not inserted into the shaft through hole of the holding member, and FIG. 6B is a sectional view taken along the line DD in FIG. FIG.
[Explanation of symbols]
1 .. Holding member 2.. Ring-shaped member 3.. Needle 4.. Holding groove 5.. Spring means 7 ... Rotating shaft 11 ... Shaft through hole 12 ... Projection pillar 12c · · second aspect, 12d · · first aspect, the outer diameter of D · · needle, L · · distance between the inner surfaces of adjacent projecting posts, when the [delta] · · spring means is in a free state two Doru which can be moved along the extending direction of the coercive Jimizonai device conservation unit distance.

Claims

回転軸を嵌入するための軸通孔を中心に備え、前記軸通孔を囲むようにして所定間隔をもって軸方向に突設した複数の突設柱を有する保持部材であって、各突設柱が周方向において第１の側面と第２の側面とを備え、前記第１の側面がこれに隣接する突設柱の前記第２の側面と対向するように配設されている、プラスチック製の保持部材と、
前記複数の突設柱を外側から囲み、前記保持部材と相対回転しないリング状部材と、
隣接する前記突設柱の一方の第１の側面と他方の第２の側面との間に形成される保持溝と、
前記保持溝内において軸方向に保持され、前記軸通孔に嵌入された前記回転軸と軸方向に接するニードルと、
前記突設柱の第１の側面からこれと隣接する突設柱の第２の側面へ向けて延出するプラスチック製のバネ手段とを備え、
前記ニードルが前記保持溝内で前記第１の側面側に移動する方向に前記回転軸が回転する際には軸受け作用が働き、前記ニードルが前記保持溝内で前記第２の側面側に移動する方向に前記回転軸が回転する際には緊締作用が働く一方向クラッチにおいて、
前記ニードルは前記保持溝内に保持されており、前記軸通孔には前記回転軸が挿入されておらず、前記バネ手段の付勢力が前記ニードルに作用しない状態にあるときに、前記ニードルの外径をＤとし、隣接する前記突設柱の内面間の距離をＬとし、前記ニードルが前記保持溝内を前記バネ手段の延出方向に沿って移動可能な距離をδとしたとき、下記（１）式を満たすことを特徴とする一方向クラッチ。
Ｌ<Ｄ<Ｄ＋δ （１）A holding member having a plurality of projecting columns provided in the axial direction with a predetermined interval so as to surround the shaft through hole, and having a shaft through hole for inserting a rotation shaft. A plastic holding member having a first side surface and a second side surface in a direction, the first side surface being disposed so as to face the second side surface of the projecting pillar adjacent to the first side surface When,
A ring-shaped member that surrounds the plurality of protruding columns from the outside and does not rotate relative to the holding member;
A holding groove formed between one first side surface and the other second side surface of the adjacent protruding pillars;
A needle held in the holding groove in the axial direction and in contact with the rotating shaft fitted in the shaft through hole in the axial direction;
A spring means made of plastic extending from the first side surface of the protruding column toward the second side surface of the protruding column adjacent thereto,
When the rotary shaft rotates in a direction in which the needle moves to the first side surface in the holding groove, a bearing action is exerted, and the needle moves to the second side in the holding groove. In the one-way clutch in which the tightening action works when the rotating shaft rotates in the direction,
The needle is held in the holding groove, and the rotating shaft is not inserted into the shaft through hole, and when the urging force of the spring means does not act on the needle, When the outer diameter is D, the distance between the inner surfaces of the adjacent protruding columns is L, and the distance that the needle can move in the holding groove along the extending direction of the spring means is δ, A one-way clutch that satisfies the expression (1).
L <D <D + δ (1)

前記保持部材とバネ手段が一体の成形体である、請求項１に記載の一方向クラッチ。The one-way clutch according to claim 1 , wherein the holding member and the spring means are an integral molded body.

前記リング状部材の内面が前記保持部材の前記突設柱の外面に対して軸方向の略全長に亘って回り止め形状をなす、請求項１又は請求項２に記載の一方向クラッチ。Said inner surface of the ring-shaped member forms a stop shape around and over substantially the entire length of the axial direction with respect to the outer surface of the projecting column of the holding member, the one-way clutch according to claim 1 or claim 2.

前記リング状部材の内面は多角形をなし、前記保持部材の前記突設柱の外面が該リング状部材の内面と相補的な形状をなす、請求項３に記載の一方向クラッチ。The one-way clutch according to claim 3, wherein an inner surface of the ring-shaped member has a polygonal shape, and an outer surface of the protruding column of the holding member has a shape complementary to the inner surface of the ring-shaped member.

前記保持部材は前記突設柱が突設された本体を有し、該本体は前記突設柱が突設された面に係合突起を備え、前記リング状部材は外面に前記本体の係合突起と係合する切欠を備える、請求項１乃至４に記載の一方向クラッチ。The holding member has a main body on which the protruding column protrudes, the main body includes an engaging protrusion on a surface on which the protruding column protrudes, and the ring-shaped member engages with the main body on an outer surface. comprising a notch for projection engaging, one-way clutch according to claim 1 to 4.