JP2005052898A

JP2005052898A - Tool

Info

Publication number: JP2005052898A
Application number: JP2003206013A
Authority: JP
Inventors: Michio Torigoe; 道夫鳥越
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-08-05
Filing date: 2003-08-05
Publication date: 2005-03-03

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tool superior in easiness-to-use, by quickly performing fastening or loosening operation, by surely idly rotating only the tool to a bolt and a nut, when the tool is returned once in the inverse direction of the desired rotational direction in the middle of work. <P>SOLUTION: A movable jaw part 30 capable of adjusting an interval to a fixed jaw part 11, is arranged on a rocking body 20. A pressing lever 50 is arranged for restricting rocking of this movable jaw part 30 and the rocking body 20. While the nut is integrally rotated when moving the pressing lever 50 in the prescribed rotational direction by sandwiching the nut between the fixed jaw part 11 and the movable jaw part 30, the rocking body 20 is not restrained when inversely moving the pressing lever 50 in the rotational direction. Since the movable jaw part 30 and the rocking body 20 rock and allow relative rotation of the nut, while rotating the nut in the desired direction, the pressing lever 50 is returned once and can be repeatedly operated when reaching a rotational operation limit, and following rotation of the nut is not caused in return operation, and the efficiency of fastening and loosening work can be improved. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、種々の大きさの六角ボルトやナットに対応してこれらの締め、緩めを行う工具に関し、特に、様々な大きさのボルトやナットに適切に対応してこれらの締め及び緩め動作が確実且つ素早く行える工具に関する。
【０００２】
【従来の技術】
六角ボルトやナットを締めたり緩めたりする工具であるレンチ（スパナ）は、ボルトの二面幅に一対一に対応したタイプ、また、二面幅に対応する開口幅を調整により変化させられる自在タイプのいずれも、締め、緩め作業の際、周囲の障害物等の状況から所定角度範囲を超えて回せない場合は、係合させたボルト又はナットから一旦取外し、再び回すことのできる係合関係で係合させて、作業を再開する手順となっていた。こうした取付け、取外しの手間を省くために、ラチェット機構により所定回転方向へは入力側（ハンドル部）からの回転力がボルト又はナットに伝わる一方、その逆回転方向へは回転力が伝わらず入力側のみを空転させられるよう構成されて、締め、緩め作業を連続して行うことのできるいわゆるラチェットレンチも用いられていた。
【０００３】
ただし、ラチェットレンチはラチェット機構部分の複雑さから、自在タイプとするのは難しく、従来は二面幅の取り得る各値にそれぞれ個別対応したものや、ボルトやナットへの係合部分のみ各二面幅に対応したものに取替えるようにしたものしかなく、作業対象のボルトやナットの大きさが変ると工具自体の交換や一部を取替える手間が生じる。
【０００４】
こうした中、ボルトやナットと係合する部分を調整可能として種々の二面幅に対応可能としつつ、締めあるいは緩めようとする所望の方向へはボルト又はナットを確実に動かす一方、その逆方向へは工具のみ空転する機構として、ラチェットレンチ同様にボルト又はナットから取外すことなく連続的に作業が行えることを目指した工具が種々提案されている。こうした従来の工具の例として、特開平１１−２０７６４５号公報や特開２００３−２５２４１号公報に記載されるものがある。
【０００５】
【特許文献１】特開平１１−２０７６４５号公報
【０００６】
【特許文献２】特開２００３−２５２４１号公報
【０００７】
【発明が解決しようとする課題】
従来の工具は以上のように構成されており、前記特許文献１（特開平１１−２０７６４５号公報）で示される従来前者の工具においては、ボルト又はナットが締りきる直前や締り位置からの緩めを開始した直後など、ボルト又はナットからこれらを回転させようとする工具側へ十分に抵抗反力が加わる状況では、工具を所望の回転方向と逆向きに戻そうとする際、工具の可動顎が反力を受けてスムーズにスライド移動して開口幅を広げ、ボルト又はナットに対する工具の空転を許容する。
【０００８】
ただし、この従来の工具において、ボルト又はナットと係合する固定顎と可動顎の向きは一切変化せず、開口幅のみが変るものであり、また、可動顎が開口幅を狭める方向へ付勢されているため、可動顎を動かすのに必要な力は大きくなっている。このため、ボルト又はナットが緩み、ボルト又はナットからこれらを回転させようとする工具側へ抵抗反力がほとんど加わらない状況では、工具を所望の回転方向とは逆向きに戻そうとすると、この工具の動きに伴うボルト又はナットからの反力では工具の可動顎が開口幅を広げる向きへスライド移動しきれず、固定顎と可動顎間でボルト又はナットの相対回転は許容されないまま、ボルト又はナットは工具と共回りしてしまい、工具のみ空転する機構として動作させられないという課題を有していた。
【０００９】
さらに、前記特許文献２（特開２００３−２５２４１号公報）で示される従来後者の工具においても、前記同様、ボルト又はナットが締りきる直前や締り位置からの緩めを開始した直後など、ボルト又はナットからこれらを回転させようとする工具側へ十分に抵抗反力が加わる状況では、工具を所望の回転方向と逆向きに戻そうとする際、工具の下顎部がボルト又はナットに相対的に押される形でスムーズに摺動して開口幅を広げ、ボルト又はナットに対する工具の空転を許容する。
【００１０】
しかしながら、工具を所望の回転方向に動かしてボルト又はナットを締めたり緩めたりする際のボルト又はナットの保持力を十分確保するために、下顎部はばねで上顎部側へ付勢されており、下顎部を開き側に摺動させるためにはこのばねの付勢力に抗する所定の力が必要となる上、工具におけるボルト又はナット各側面との接触箇所が多いため、ボルト又はナットから工具側へ抵抗反力がほとんど加わらないような状況で、工具を所望の回転方向とは逆向きに戻そうとすると、工具の動きに伴うボルト又はナットからの反力では工具の下顎部が開口幅を広げる向きへ摺動できず、上顎部と下顎部間の開口部分でボルト又はナットの相対回転に必要なスペースを生じさせられないまま、ボルト又はナットが工具と接して共回りし、工具のみ空転する機構として動作させられないという課題を有していた。
【００１１】
以上のように、これら従来の工具では、結局、係合させたボルト又はナットから一旦工具を外し、再びボルト又はナットを所望の回転方向に回すことのできる係合関係で係合させて、締め又は緩め作業を再開する手間が生じてしまうことから、導入に伴う作業性改善の度合が小さく、実際の作業能率向上にはつながらないという課題を有していた。
【００１２】
本発明は前記課題を解消するためになされたもので、作業途中で所望の回転方向とは逆方向へ工具を一旦戻す場合に、ボルトやナットに対し工具のみを確実に空転させられ、所望の回転方向への締め又は緩め動作を素早く確実に実行でき、使い勝手に優れる工具を提供することを目的とする。
【００１３】
【課題を解決するための手段】
本発明に係る工具は、六角ボルトの六角頭部側面又は六角ナットの側面に当接可能な平面部を有する固定顎部を一端部に形成される工具本体と、当該工具本体の固定顎部から所定寸法離れた箇所で前記固定顎部の平面部と平行をなす軸線を中心に揺動可能に取付けられ、工具本体の前記平面部に面する側で、工具本体の前記一端部寄り所定位置から工具本体他端部寄り所定位置までの所定角度範囲で揺動する揺動体と、六角ボルトの六角頭部側面又は六角ナットの側面に当接可能な平面部を有し、前記揺動体の前記工具本体一端部に最も近付いた揺動位置において、前記平面部を前記固定顎部の平面部に略平行に対向させる配置とされて揺動体に前記平面部の法線方向へ摺動自在に配設される可動顎部と、前記揺動体と可動顎部間に配設され、可動顎部を揺動体に対し変位させる一方、可動顎部に加わる外力による可動顎部の揺動体に対する動きは制限する位置決め機構と、前記工具本体の他端部に揺動可能に取付けられ、一端部から揺動中心位置までの寸法が他端部から揺動中心位置までの寸法に比べて小さい押圧レバーとを備え、当該押圧レバーの一端側が、前記工具本体一端部に最も近付いた揺動位置とされた揺動体の所定箇所に当接して前記揺動体の揺動動作を拘束する位置から、揺動体との干渉がない位置までの所定角度範囲で工具本体に対し揺動可能とされ、揺動体が工具本体一端部から遠ざかる場合の揺動体揺動中心に対する回り方向と同じ一の回り方向で押圧レバー揺動中心周りに揺動すると、前記揺動体の揺動動作を拘束する位置に向い、且つ前記一の回り方向とは逆向きの他の回り方向で押圧レバー揺動中心周りに揺動すると、前記揺動体との干渉がない位置に向う配置とされるものである。
【００１４】
このように本発明においては、工具本体一端部の固定顎部に対し間隔調整可能とした可動顎部を揺動体上に設けて揺動可能とする一方、この可動顎部及び揺動体の揺動を必要に応じて制限する押圧レバーを配設し、開口側から見てボルト又はナットを回転させたい方向の上手側に固定顎部、下手側に可動顎部が位置するようにして固定顎部と可動顎部との間にボルト又はナットを挟み、押圧レバーを前記ボルト又はナットを回転させたい所望の回転方向に動かすと、押圧レバーが揺動体に当接してこれを固定し、ボルトやナットを確実に保持して一体に回動させられる状態となる一方、押圧レバーを前記所望の回転方向とは逆方向へ動かすと、揺動体が拘束されず、押圧レバーの動きに伴うボルト又はナットからの反力の加わる向きと可動顎部及び揺動体の揺動可能な向きとが略一致して、この反力の大小によらず反力に対し可動顎部及び揺動体がスムーズに揺動し、ボルト又はナットの固定顎部と可動顎部間での相対回転を許容する状態となることにより、ラチェットレンチと同様、ボルト又はナットを所望方向へ回転させる中で、押圧レバーが作業空間における所望方向への回転操作限界に達したら押圧レバーを一旦戻して押圧レバーを繰返し操作でき、押圧レバーの戻し操作中におけるボルト又はナットの共回りもなく、ボルト又はナットに対し工具全体を確実に空転させられ、ボルト又はナットを所望の方向のみに繰返し回転させて締め作業や緩め作業が素早く行え、作業能率を向上させられると共に、固定顎部と可動顎部の間隔を調整して種々の二面幅のボルトやナットに問題なく対応でき、工具を取替える手間も不要となり、作業全体を速やかに実行できる。
【００１５】
また、本発明に係る工具は必要に応じて、前記揺動体が、前記工具本体一端部に最も近付いた揺動位置とされて前記押圧レバーにより揺動動作を拘束された状態における押圧レバーとの当接部位を、揺動体の揺動中心を通る直線上に位置させてなり、前記押圧レバーが、一端部における前記揺動体の揺動動作を拘束する位置での揺動体との当接部位を、押圧レバーの揺動中心を通る直線と直交する面とされてなるものである。
【００１６】
このように本発明においては、揺動体の拘束状態における押圧レバーとの当接部位が揺動体の揺動中心を通る直線上に位置すると共に、押圧レバー一端部における揺動体との当接部位が押圧レバーの揺動中心を通る直線と直交する面となっており、揺動体に押圧レバー一端部を当接させた場合に、揺動体と押圧レバーをずれ等なく密着させられることに加え、揺動体側から押圧レバー当接面に加わる力のベクトルの延長線上に押圧レバーの揺動中心を位置させられることにより、押圧レバーのぶれなど不要な動きを一切伴うことなく、当接状態にある押圧レバーのみで揺動体を強力に支持して揺動体の固定状態を確実に維持でき、揺動体の拘束に関して作業者が押圧レバーをこの当接位置に維持しようとする労力は一切必要なく、作業者は押圧レバーに加える力を全てボルト又はナットの回動に振向けられ、効率よく作業を行える。
【００１７】
また、本発明に係る工具は必要に応じて、前記揺動体が、前記押圧レバーにより揺動動作を拘束された状態における押圧レバーとの当接部位に対して揺動中心寄り側に隣接する所定範囲部分を、前記他の回り方向に揺動して前記当接部位から離れた押圧レバー一端部の揺動動作経路と少なくとも重ならない程度まで凹状に切り欠かれるものである。
【００１８】
このように本発明においては、揺動体の一部を切り欠いて揺動体拘束状態における揺動体の当接部位から離れた押圧レバーと揺動体とが揺動体の拘束解消直後から互いに干渉しない状態とし、押圧レバーの揺動体拘束解消後の揺動変位量を抑えられることにより、押圧レバーの工具本体に対する揺動角度範囲を小さく設定でき、各操作時に当初押圧レバーのみ工具本体に対し動く状態から押圧レバーを含む工具全体が動く状態になるまでの押圧レバーの変位を小さくできることとなり、実際の作業空間で、押圧レバーにより工具全体を一体に動かせる工具全体としての有効回転動作範囲を広げられ、作業効率を向上させられる。
【００１９】
【発明の実施の形態】
以下、本発明の一実施の形態に係る工具を図１〜図５に基づいて説明する。図１は本実施の形態に係る工具の正面図、図２は本実施の形態に係る工具の平面図及び一部省略左側面図、図３は本実施の形態に係る工具のナット締付け状態説明図、図４は本実施の形態に係る工具の戻し回転動作開始状態説明図、図５は本実施の形態に係る工具の戻し回転動作説明図である。
【００２０】
前記各図において本実施の形態の工具１は、六角ボルトの六角頭部側面又は六角ナットの側面に当接可能な固定顎部１１を一体に形成される工具本体１０と、この工具本体１０の固定顎部１１から所定寸法離れた箇所に揺動可能に取付けられる揺動体２０と、この揺動体２０にスライド可能に配設される可動顎部３０と、この可動顎部３０を前記揺動体２０に対しスライド駆動する一方、可動顎部３０に加わる外力による可動顎部３０の揺動体２０に対する動きを制限する位置決め機構４０と、前記工具本体１０の他端部に揺動可能に取付けられる押圧レバー５０とを備える構成である。
【００２１】
前記工具本体１０は、一端部に六角ボルトの六角頭部側面又は六角ナットの側面に当接させる平面部１１ａを有する先細状の固定顎部１１を一体に形成されてなり、この固定顎部１１近傍に前記揺動体２０を揺動可能に支持する支持部１２を備える一方、他端部には前記押圧レバー５０を揺動可能に支持する支持部１３を備える構成である。また、工具本体１０の他端部側には前記押圧レバー５０の揺動範囲を制限するピン１４が配設される。
【００２２】
前記揺動体２０は、工具本体１０の支持部１２に係合して工具本体１０の固定顎部１１寄り位置から工具本体１０の他端部寄り位置までの所定角度範囲揺動可能とされてなり、この揺動体２０上の可動顎部３０平面部を固定顎部１１平面部に平行に対向させる状態から各平面部同士が間隔を広げて互いに傾いた状態まで位置変化させる構成である。
【００２３】
この揺動体２０は、最も工具本体１０の固定顎部１１寄りに位置する状態で、揺動体２０揺動中心を通る直線上に位置する端部の被押圧部２１で押圧レバー５０の一端部と当接可能となっており（図１参照）、ボルト又はナットの締付け時など、必要に応じてこの被押圧部２１に押圧レバー５０一端部を当接させる場合に、揺動体２０と押圧レバー５０間で横方向へのずれ等を一切生じさせず確実に密着した状態を得ることができ、揺動体２０を揺動させようとする力を押圧レバー５０で無理なく受止めて揺動体２０を確実に拘束できるようにしている。
また、揺動体２０は、端部の被押圧部２１に対して揺動中心寄り側に隣接する所定範囲部分を、被押圧部２１から離れた押圧レバー５０一端部の揺動動作経路と重なって押圧レバー５０との干渉が起らないよう、凹状に切り欠かれる構成である。
【００２４】
前記可動顎部３０は、前記ボルト又はナットの側面に当接可能な平面部３１を有してなり、前記揺動体２０が最も固定顎部１１に接近した揺動位置において、前記平面部３１が固定顎部１１の平面部１１ａに平行に対向する状態を維持したまま固定顎部１１との間隔を調整可能となるよう揺動体２０に摺動自在に配設される構成である。この可動顎部３０が、ボルト又はナットの固定顎部１１に当接する側面の反対面に当接することで、ボルト又はナットを挟持可能となる。なお、揺動体２０と工具本体１０との間には、揺動体２０を支持部１２中心に固定顎部１１側へ近付くよう付勢する弱いばね（図示を省略）が配設されており、工具に一切外力の加わっていない場合にも、固定顎部１１と可動顎部３０を平行に対向させている状態が得られ、挟もうとするボルトやナットに対する固定顎部１１と可動顎部３０との間隔調整が行い易くなっている。
【００２５】
これら揺動体２０及び可動顎部３０の構造に対し、前記各特許文献記載の従来の工具は、ボルト又はナットに対して工具のみの空転を実現するために、開口幅を変化させる可動部分を固定部分に対し直線的にスライドさせたり所定の拘束された経路に沿って摺動させたりする構造であり、一時的に開口幅を広げた状態から前記可動部分が開口幅を狭める方へ戻る際に、ボルトやナット等から一部に力が加わると、可動部分に回転モーメントが発生して摺動部位で引っ掛かりを生じて中途停止し易く、この引っ掛かりへの対策として比較的強いばねを用いて戻り動作を強制する仕組みとなっていた。これらと比べて、本実施の形態の可動部分（揺動体２０と可動顎部３０）は支持部１２を中心として揺動する単純な構造であり、一部に力が加わるとそのまま支持部１２を中心とする回転モーメントとして受けて引っ掛かりを生じることもなく単に揺動するのみとなるため、動作を強制する強力なばねを用いずに済み、ばねの付勢力が開口幅を広げる際の大きな負荷抵抗とならず、共回り防止の点で有利である。
【００２６】
前記位置決め機構４０は、可動顎部３０の摺動方向に平行な回動軸を中心として揺動体２０に回動自在に配設されるウォーム部４１と、可動顎部３０の摺動方向に連続させて可動顎部３０に一体形成されるウォームラック部４２とからなる公知のウォームギヤ機構であり、詳細な説明を省略する。ウォーム部４１を回転させることで可動顎部３０を揺動体２０に対し適宜スライドさせられる一方、可動顎部３０に加わる外力に対してはウォームラック部４２側からウォーム部４１を駆動できないウォームギヤ機構特有の性質により可動顎部３０の揺動体２０に対する不要な動きを制限できる仕組みである。
【００２７】
前記押圧レバー５０は、工具本体１０の支持部１３に係合してピン１４により拘束される所定角度範囲内で揺動可能とされてなり、揺動中心位置より固定顎部１１寄りに位置する一端部を、固定顎部１１に最も接近した位置となっている揺動体２０の被押圧部２１に当接して前記揺動体２０の揺動を制限する角度位置から、揺動体２０の動きと干渉しない角度位置まで揺動させられる構成である。
【００２８】
この押圧レバー５０一端部における揺動体２０の被押圧部２１との当接面は、この当接面における法線が押圧レバー５０の揺動中心を通るように形成されており（図１参照）、押圧レバー５０と揺動体２０とを当接させると、揺動体２０側から押圧レバー５０当接面に加わる力のベクトルの延長線上に押圧レバー５０の揺動中心が位置することとなり、揺動体２０から押圧レバー５０に力が加わっても、作業者の押圧レバー５０をこの当接位置に維持しようとする労力を一切必要とせず、押圧レバー５０の支持部１３周りの不要な動きを伴うことなく押圧レバー５０の存在のみで揺動体２０を強力に支持して揺動体２０の固定状態を確実に維持でき、作業者が押圧レバー５０に加える力を全てボルト又はナットの回動に振向けることができる。
【００２９】
また、この押圧レバー５０で揺動体２０の固定顎部１１に最も接近した状態を適切に維持させられることから、作業時に固定顎部１１と可動顎部３０とを平行状態に維持するのにばねによる揺動体２０の付勢が全く不要であり、揺動体２０を固定顎部１１側へ付勢するばね力を必要最小限とすることができ、開口幅を広げる際の負荷抵抗となるばねの付勢力を極めて小さく抑えて確実に共回り防止が図れる仕組みとなっている。
【００３０】
次に、前記構成に基づく工具の使用状態について説明する。まず、ナット６０を締付ける場合は、固定顎部１１と可動顎部３０との間隔を十分取った状態で、固定顎部１１と可動顎部３０のなす開口側から見てナット６０を回転させたい方向の上手側に固定顎部１１、下手側に可動顎部３が位置するように、すなわち、図３に示すように、締め側となる時計回り方向に回転させようとするナット６０の左側に固定顎部１１を、ナット６０の右側に可動顎部３０をそれぞれ位置させてナット６０を挟み、揺動体２０を最も固定顎部１１に近付けて固定顎部１１と可動顎部３０とを平行に対向させた状態で、位置決め機構４０のウォーム部４１を操作して可動顎部３０位置を調整し、固定顎部１１と可動顎部３０をナット６０側面に密着させる。
【００３１】
この状態で、押圧レバー５０を把持してナット６０を中心に押圧レバー５０を時計回りに回転させようとすると、はじめに押圧レバー５０が工具本体１０に対し時計回りに揺動して押圧レバー５０一端部が揺動体２０端部の被押圧部２１に当接し、揺動体２０の動きを拘束して揺動不能な固定状態とする（図３（Ａ）参照）。これにより、可動顎部３０の位置も固定状態となり、固定顎部１１と可動顎部３０の間隔が保持され、固定顎部１１と可動顎部３０がナット６０側面との当接状態を維持する。この後、押圧レバー５０のさらなる時計回りの回転操作に伴って工具１全体を回転させ、ナット６０を工具１と一体に回して締付けることができる。
【００３２】
一方、障害物等の存在で押圧レバー５０をそれ以上時計回りに回転させられない状況となり、ナット６０に対し逆の反時計回りに押圧レバー５０を回転させて押圧レバー５０を戻そうとすると、まず押圧レバー５０が工具本体１０に対して反時計回りに揺動し、押圧レバー５０一端部が揺動体２０の被押圧部２１から離れて揺動体２０の固定状態を解放し、揺動体２０は固定顎部１１から離隔する向きに揺動可能な状態となる。
【００３３】
押圧レバー５０のさらなる戻し回転操作に伴って押圧レバー５０は工具本体１０に対する揺動限界に達し（図４参照）、工具１全体を反時計回りに回転させる状態へ移行する。そして、ナット６０に対し反時計回りに回転しようとする固定顎部１１及び可動顎部３０に対し、ナット６０はそのまま停止した状態を維持しようとして時計方向に相対回転することとなる。
【００３４】
ここで、ナット６０の相対回転に伴うナット６０角部の相対移動方向（図４、図５（Ａ）中、破線矢印Ａ方向）と、このナット６０角部と接する可動顎部３０における揺動体２０の揺動に伴う動き方向がほぼ一致していることに加え、ナット６０と可動顎部３０の接触位置が揺動体２０の揺動中心から離れていることで、ナット６０の緩み等でナット６０角部から可動顎部３０へ伝わる反力が小さくても、揺動体２０を固定顎部１１側に付勢するばね（図示を省略）の付勢力に抗して可動顎部３０ごと揺動体２０を十分動かせることとなる。
【００３５】
こうして、相対回転しようとするナット６０の角部に接して開き側への反力を受ける可動顎部３０及び揺動体２０は固定顎部１１から離隔する向き（図５（Ａ）中、実線矢印Ｂ方向）にスムーズに動いて、固定顎部１１と可動顎部３０間でのナット６０の相対回転が許容され、ナット６０を工具１と共回りさせることなく、ナット６０に対し工具１全体が空転する（図５参照）。この工具１全体の空転中、ナット６０の相対回転に伴う角部位置の移動に伴い、可動顎部３０及び揺動体２０が固定顎部１１に近付く向きへ戻る際も、揺動体２０と可動顎部３０は引っ掛かり等、機構的に不具合を生じることなく支持部１２を中心としてスムーズに揺動でき、可動顎部３０がナット６０に接する状態を維持し、工具１全体の回転操作を工具１をナット６０から離すことなくスムーズに継続させられる。
【００３６】
このまま反時計回りの戻し回転操作で、時計回り方向への回転しろが十分確保できる状態まで押圧レバー５０を戻したら、再び前記同様にナット６０に対し押圧レバー５０を時計回りに回転させ、固定顎部１１と可動顎部３０をナット６０の対向する二側面にそれぞれ密着させた状態を維持しつつ、ナット６０を工具１と一体に回して締付けが行え、これ以降も前記同様の操作を繰返すことで、ナット６０の締付け作業が工具１をナット６０から完全に外すこともなく繰返し行える。
【００３７】
逆に、ナット６０を緩める場合は、工具１の表裏を前記と逆にし、固定顎部１１をナット６０の右側に、可動顎部３０をナット６０の左側に位置させてナット６０を挟み、押圧レバー５０を把持してナット６０に対し押圧レバー５０を緩め側となる反時計回りに回転させようとすると、前記締付け作業における締め動作の際と同様、押圧レバー５０による揺動体２０の拘束・固定により、固定顎部１１と可動顎部３０がナット６０との当接状態を維持し、ナット６０を一体に回して緩めることができる。そして、障害物等の存在で押圧レバー５０をそれ以上反時計回りに回転させられなくなり、ナット６０に対し逆の時計回りに押圧レバー５０を回転させて押圧レバー５０を戻そうとすると、前記締付け作業における戻し動作の際と同様、押圧レバー５０一端部が揺動体２０の被押圧部２１から離れて揺動体２０を解放し、停止状態を維持しようとして工具１に対し相対回転するナット６０の角部に接して開き側への反力を受ける可動顎部３０及び揺動体２０がスムーズに動くこととなり、ナット６０を工具１と共回りさせることなく、ナット６０に対し工具１全体が空転し、反時計回り方向への回転しろが十分得られる位置まで押圧レバー５０を戻して緩め作業を繰返せる。
【００３８】
このように、本実施の形態に係る工具においては、工具本体１０一端部の固定顎部１１に対し間隔調整可能とした可動顎部３０を揺動体２０上に設けて揺動可能とする一方、この可動顎部３０及び揺動体２０の揺動を必要に応じて制限する押圧レバー５０を配設し、開口側から見てナット６０を回転させたい方向の上手側に固定顎部１１、下手側に可動顎部３０を位置させて固定顎部１１と可動顎部３０との間にナット６０を挟み、押圧レバー５０をナット６０を回転させたい所望の回転方向に動かすと、押圧レバー５０が揺動体２０に当接してこれを固定し、ナット６０を確実に保持して一体に回転させられる状態となる一方、押圧レバー５０を所望の回転方向と逆方向へ動かすと、揺動体２０が拘束されず、押圧レバー５０の動きに伴うナット６０からの反力に対し可動顎部３０及び揺動体２０がスムーズに揺動してナット６０の固定顎部１１と可動顎部１２間での相対回転を許容する状態となることから、ナット６０に対する締付け又は緩め作業の中で、押圧レバー５０が作業空間における所望方向への回転操作限界に達したら押圧レバー５０を一旦戻して押圧レバー５０を繰返し操作でき、押圧レバー５０の戻し操作中におけるナット６０の共回りもなく、ナット６０を所望の方向のみに繰返し回転させて締め作業や緩め作業が素早く行え、作業能率を向上させられると共に、可動顎部３０の位置調整で種々の二面幅のボルトやナットに対応でき、工具を取替える手間が不要となる。
【００３９】
なお、前記実施の形態に係る工具においては、揺動体２０端部の被押圧部２１に対し揺動中心寄り側に隣接する所定範囲部分を、押圧レバー５０との干渉が起らないよう凹状に切り欠く構成としているが、これに限らず、図６及び図７に示すように、揺動体２０の拘束状態における押圧レバー５０との当接部位（被押圧部２１）が揺動体２０の揺動中心を通る直線上に位置すると共に、押圧レバー５０一端部における揺動体２０との当接部位が押圧レバー５０の揺動中心を通る直線と直交する面とされる特徴はそのままにしつつ、揺動体２０と押圧レバー５０の当接が生じる位置関係を変えて、揺動体２０に切り欠き部分を設けなくても押圧レバー５０との干渉が避けられる構成とすることもできる。前記いずれの形態においても、ナット６０角部と可動顎部３０の接触位置が揺動体２０の揺動中心から離れるほど、ナット６０角部から可動顎部３０へ加わる反力に基づいて揺動体２０を動かそうとする力が、揺動体２０を固定顎部１１側に付勢するばね力に比べて大きくなり、ナット６０からの反力が弱くても揺動体２０を動かせることとなる。このため、戻し操作時のボルトやナットの共回り防止の観点からは、工具本体１０における揺動体２０の揺動中心となる支持部１２位置はなるべく固定顎部１１から離して工具本体１０他端部寄りとするのが望ましい。
【００４０】
また、前記実施の形態に係る工具において、揺動体２０の拘束状態における押圧レバー５０との当接部位が揺動体２０の揺動中心を通る直線上に位置すると共に、押圧レバー５０一端部における揺動体２０との当接部位が押圧レバー５０の揺動中心を通る直線と直交する面となる構成としているが、これに限らず、揺動体２０の拘束状態における押圧レバー５０と揺動体２０との各当接部位を所望の位置関係となるように形成する構成とすることもでき、この場合には、作業者の押圧レバー５０に加える力の一部を、押圧レバー５０をこの当接状態に維持するために振向ける必要が生じ、作業者の押圧レバー５０へ加える力が同じ場合、揺動体２０における押圧レバー５０との当接位置が揺動体２０揺動中心から遠ざかるほど、押圧レバー５０一端側の押圧レバー５０揺動中心からの長さが押圧レバー５０他端側の押圧レバー５０揺動中心からの長さに比べ小さくなるほど、揺動体２０を固定顎部１１側へより強力に押付けた状態に保持できることとなる。
【００４１】
また、前記実施の形態に係る工具において、押圧レバー５０の一端部との干渉を避けるべく揺動体２０を一部凹状に切り欠いた構成としているが、この他、押圧レバー５０が、一端部の揺動体２０との当接部位近傍所定範囲部分を、拘束解除に伴って前記工具本体１０一端部から遠ざかる向きに揺動する揺動体２０の揺動動作経路と重ならない程度まで凹状に切り欠かれる構成とすることもでき、押圧レバー５０と揺動体２０との干渉を防いで、前記同様に押圧レバー５０の揺動体拘束解消後の揺動変位量を抑えられることから、押圧レバー５０の工具本体１０に対する揺動角度範囲を小さく設定でき、実際の作業空間で、押圧レバー５０により工具全体を一体に動かせる動作範囲を広げられ、作業効率を向上させられる。
【００４２】
また、前記実施の形態に係る工具において、揺動体２０に取付けられて位置決め機構４０をなすウォーム部４１は、前記各図中における工具表面側で上向きに進ませる回転操作により、可動顎部３０を固定顎部１１との間隔を広げる方向に移動させる構成としているが、この他、ウォーム部４１を逆向きに揺動体２０に配設し、ウォーム部４１に対する同じ操作で可動顎部３０を固定顎部１１との間隔を狭める方向に移動させるなど、ウォーム部４１の回転方向と可動顎部３０のスライド方向との関係はどのように設定してもかまわない。
【００４３】
また、前記実施の形態に係る工具において、固定顎部１１と可動顎部３０とが外力の加わらない通常状態で互いに平面部同士を平行に対向させる状態となる構成としているが、この他、外力の加わらない通常状態で固定顎部１１と可動顎部３０とが平行より若干開いた状態となるように、揺動体２０を固定顎部１１から離れる向きに付勢する所定の付勢手段を工具本体１０と揺動体２０間に配設する構成とすることもできる。この場合、さらに固定顎部１１と可動顎部３０の開口側に対する最奥部位に略波状断面をなす多数の微小凹凸を形成して、平行より開いた状態のこの固定顎部１１と可動顎部３０の各凹凸部分間に回転対象物を挟んで押圧レバー５０を回転操作すると、従来公知のいわゆるパイプレンチ同様の動作で回転対象物を回転させて締付け、緩め作業が行えることとなり、パイプレンチとしての機能を付加できる。
【００４４】
また、前記実施の形態に係る工具において、押圧レバー５０は工具本体１０に対し角度範囲を制限されつつ揺動可能に取付けられる構成としているが、この他、押圧レバー５０を必要に応じて工具本体１０に対し固定状態とするストッパーを配設し、工具本体１０に対する押圧レバー５０の揺動が起らない構成とすることもでき、工具を全回転させられる作業空間が得られ、工具をボルト又はナットに対し空転させる必要がない場合には、押圧レバー５０を揺動体２０に当接させて固定し、揺動体２０共々不要な揺動を抑えて従来公知のいわゆるモンキーレンチ同様に利用できる。
【００４５】
また、前記実施の形態に係る工具において、押圧レバー５０は、押圧レバー５０一端部と揺動体２０の被押圧部２１との当接状態で、押圧レバー５０他端部が工具本体１０の他端部とほぼ同じ方向に延長された状態となる位置関係で形成される構成としているが、この他、押圧レバー５０一端部と揺動体２０の被押圧部２１との当接状態で、押圧レバー５０他端側が工具本体１０他端部延長方向に対し、固定顎部１１に対する可動顎部３０の存在する向きへ大きくずれた状態となるよう押圧レバー５０形状を設定する構成とすることもでき、壁に挟まれたコーナ部分等、通常のレバー形状では押圧レバー５０の操作スペースが十分取れない箇所を作業空間としてボルト又はナットの締付け（又は緩め）作業を行う場合に、押圧レバー５０の締付け方向への回転しろをレバー他端側のずれている分だけ大きく広げられることとなり、工具全体の回動角度を最大限に確保して作業効率を高められる。
【００４６】
【発明の効果】
以上のように本発明によれば、工具本体一端部の固定顎部に対し間隔調整可能とした可動顎部を揺動体上に設けて揺動可能とする一方、この可動顎部及び揺動体の揺動を必要に応じて制限する押圧レバーを配設し、開口側から見てボルト又はナットを回転させたい方向の上手側に固定顎部、下手側に可動顎部が位置するようにして固定顎部と可動顎部との間にボルト又はナットを挟み、押圧レバーを前記ボルト又はナットを回転させたい所望の回転方向に動かすと、押圧レバーが揺動体に当接してこれを固定し、ボルトやナットを確実に保持して一体に回動させられる状態となる一方、押圧レバーを前記所望の回転方向とは逆方向へ動かすと、揺動体が拘束されず、押圧レバーの動きに伴うボルト又はナットからの反力の加わる向きと可動顎部及び揺動体の揺動可能な向きとが略一致して、この反力の大小によらず反力に対し可動顎部及び揺動体がスムーズに揺動し、ボルト又はナットの固定顎部と可動顎部間での相対回転を許容する状態となることにより、ラチェットレンチと同様、ボルト又はナットを所望方向へ回転させる中で、押圧レバーが作業空間における所望方向への回転操作限界に達したら押圧レバーを一旦戻して押圧レバーを繰返し操作でき、押圧レバーの戻し操作中におけるボルト又はナットの共回りもなく、ボルト又はナットに対し工具全体を確実に空転させられ、ボルト又はナットを所望の方向のみに繰返し回転させて締め作業や緩め作業が素早く行え、作業能率を向上させられると共に、固定顎部と可動顎部の間隔を調整して種々の二面幅のボルトやナットに問題なく対応でき、工具を取替える手間も不要となり、作業全体を速やかに実行できるという効果を奏する。
【００４７】
また、本発明によれば、揺動体の拘束状態における押圧レバーとの当接部位が揺動体の揺動中心を通る直線上に位置すると共に、押圧レバー一端部における揺動体との当接部位が押圧レバーの揺動中心を通る直線と直交する面となっており、揺動体に押圧レバー一端部を当接させた場合に、揺動体と押圧レバーをずれ等なく密着させられることに加え、揺動体側から押圧レバー当接面に加わる力のベクトルの延長線上に押圧レバーの揺動中心を位置させられることにより、押圧レバーのぶれなど不要な動きを一切伴うことなく、当接状態にある押圧レバーのみで揺動体を強力に支持して揺動体の固定状態を確実に維持でき、揺動体の拘束に関して作業者が押圧レバーをこの当接位置に維持しようとする労力は一切必要なく、作業者は押圧レバーに加える力を全てボルト又はナットの回動に振向けられ、効率よく作業を行えるという効果を有する。
【００４８】
また、本発明によれば、揺動体の一部を切り欠いて揺動体拘束状態における揺動体の当接部位から離れた押圧レバーと揺動体とが揺動体の拘束解消直後から互いに干渉しない状態とし、押圧レバーの揺動体拘束解消後の揺動変位量を抑えられることにより、押圧レバーの工具本体に対する揺動角度範囲を小さく設定でき、各操作時に当初押圧レバーのみ工具本体に対し動く状態から押圧レバーを含む工具全体が動く状態になるまでの押圧レバーの変位を小さくできることとなり、実際の作業空間で、押圧レバーにより工具全体を一体に動かせる工具全体としての有効回転動作範囲を広げられ、作業効率を向上させられるという効果を有する。
【図面の簡単な説明】
【図１】本発明の一実施の形態に係る工具の正面図である。
【図２】本発明の一実施の形態に係る工具の平面図及び一部省略左側面図である。
【図３】本発明の一実施の形態に係る工具のナット締付け状態説明図である。
【図４】本発明の一実施の形態に係る工具の戻し回転動作開始状態説明図である。
【図５】本発明の一実施の形態に係る工具の戻し回転動作説明図である。
【図６】本発明の他の実施形態に係る工具の正面図である。
【図７】本発明の他の実施形態に係る工具の戻し回転動作説明図である。
【符号の説明】
１工具
１０工具本体
１１固定顎部
１１ａ平面部
１２、１３支持部
１４ピン
２０揺動体
２１被押圧部
３０可動顎部
３１平面部
４０位置決め機構
４１ウォーム部
４２ウォームラック部
５０押圧レバー
６０ナット[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tool for tightening and loosening these bolts and nuts corresponding to various sizes of hexagon bolts and nuts, and in particular, the tightening and loosening operations corresponding to bolts and nuts of various sizes appropriately. It relates to a tool that can be surely and quickly performed.
[0002]
[Prior art]
Wrench (spanner), a tool that tightens or loosens hexagon bolts and nuts, has a one-to-one correspondence with the two-sided width of the bolt, and a flexible type that can be changed by adjusting the opening width corresponding to the two-sided width. In any of the above, when tightening or loosening work, if it cannot be turned beyond the specified angle range due to surrounding obstacles, etc., it can be removed from the engaged bolt or nut and then turned again. The procedure was to engage and resume the work. In order to save time and effort for mounting and dismounting, the ratchet mechanism transmits the rotational force from the input side (handle) to the bolt or nut in the specified rotational direction, while the rotational force is not transmitted in the reverse rotational direction. A so-called ratchet wrench is also used, which is configured to be able to idle only, and can perform tightening and loosening operations continuously.
[0003]
However, because of the complexity of the ratchet mechanism part, it is difficult to make the ratchet wrench flexible. Conventionally, the ratchet wrench is individually compatible with each value that can be taken by the width of the two surfaces, or only the part that engages with the bolt or nut. There is only one that can be replaced with one that corresponds to the surface width, and if the size of the bolt or nut to be worked on changes, it will take time to replace or partially replace the tool itself.
[0004]
Under these circumstances, while the bolts and nuts can be adjusted to accommodate various widths of the two surfaces, the bolts or nuts are reliably moved in the desired direction to be tightened or loosened, but in the opposite direction. As a mechanism in which only the tool idles, various tools have been proposed that aim to be able to work continuously without being removed from the bolt or nut like the ratchet wrench. Examples of such conventional tools include those described in JP-A-11-207645 and JP-A-2003-25241.
[0005]
[Patent Document 1] JP-A-11-207645
[0006]
[Patent Document 2] Japanese Patent Laid-Open No. 2003-25241
[0007]
[Problems to be solved by the invention]
The conventional tool is configured as described above. In the former former tool disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 11-207645), the bolt or nut is loosened immediately before tightening or from the tightening position. In situations where a sufficient resistance reaction force is applied from the bolt or nut to the tool to be rotated, such as immediately after starting, the movable jaw of the tool is In response to the reaction force, it slides smoothly and widens the opening width, allowing the tool to slip on the bolt or nut.
[0008]
However, in this conventional tool, the directions of the fixed jaw and the movable jaw engaged with the bolt or nut are not changed at all, only the opening width is changed, and the movable jaw is biased in the direction of narrowing the opening width. As a result, the force required to move the movable jaw has increased. Therefore, in a situation where the bolt or nut is loosened and almost no resistance reaction force is applied to the tool side from which the bolt or nut is to be rotated, if the tool is returned to the opposite direction to the desired rotation direction, The reaction force from the bolt or nut accompanying the movement of the tool does not allow the movable jaw of the tool to slide in the direction to widen the opening width, and the relative rotation of the bolt or nut between the fixed jaw and the movable jaw is not allowed. Has a problem that it cannot be operated as a mechanism in which only the tool is idled.
[0009]
Further, in the conventional latter tool shown in Patent Document 2 (Japanese Patent Application Laid-Open No. 2003-25241), as described above, the bolt or nut is immediately before the bolt or nut is completely tightened or immediately after starting to loosen from the tightening position. When a sufficient resistance reaction force is applied to the tool side to rotate them, the lower jaw part of the tool is pushed against the bolt or nut when trying to return the tool in the direction opposite to the desired rotation direction. It slides smoothly in such a way as to widen the opening width, and allows the tool to idle relative to the bolt or nut.
[0010]
However, in order to ensure a sufficient holding force of the bolt or nut when the tool is moved in a desired rotation direction and the bolt or nut is tightened or loosened, the lower jaw is biased toward the upper jaw by a spring, In order to slide the lower jaw to the open side, a predetermined force against the biasing force of this spring is required, and since there are many contact points with each side of the bolt or nut in the tool, the tool side from the bolt or nut In a situation where almost no resistance reaction force is applied to the tool, if the tool is to be returned in the direction opposite to the desired rotation direction, the lower jaw of the tool will not open the opening width due to the reaction force from the bolt or nut accompanying the movement of the tool. The bolt or nut cannot be slid in the expanding direction, and the bolt or nut is in contact with the tool together without causing the space required for the relative rotation of the bolt or nut at the opening between the upper and lower jaws. It has been a problem that not operated as a mechanism for.
[0011]
As described above, in these conventional tools, after all, the tool is once removed from the engaged bolts or nuts, and engaged again with the engagement relationship that allows the bolts or nuts to be rotated in a desired rotation direction, and tightened. Or, since it takes time to restart the loosening work, there is a problem that the degree of workability improvement accompanying the introduction is small, and the actual work efficiency cannot be improved.
[0012]
The present invention has been made to solve the above problems, and when the tool is temporarily returned in the direction opposite to the desired rotation direction during the work, only the tool is reliably idled with respect to the bolt or nut, and the desired An object of the present invention is to provide a tool that can perform a tightening or loosening operation in a rotational direction quickly and surely and has excellent usability.
[0013]
[Means for Solving the Problems]
A tool according to the present invention includes a tool main body formed at one end of a fixed jaw portion having a flat portion capable of abutting against a hexagon head side surface or a hexagon nut side surface of a hexagon bolt, and a fixed jaw portion of the tool main body. Mounted so as to be swingable around an axis parallel to the flat portion of the fixed jaw at a predetermined distance away from the predetermined position near the one end of the tool main body on the side facing the flat portion of the tool main body. A swing body that swings within a predetermined angle range close to a predetermined position near the other end of the tool body, and a flat portion that can come into contact with a hexagon head side surface or a hexagon nut side surface of the hexagon bolt, and the tool of the swing body At the swing position closest to one end of the main body, the flat portion is disposed so as to face the flat portion of the fixed jaw substantially parallel to the swing body, and is slidable in the normal direction of the flat portion. A movable jaw portion disposed between the swinging body and the movable jaw portion. A positioning mechanism for displacing the movable jaw relative to the rocking body while restricting the movement of the movable jaw with respect to the rocking body due to an external force applied to the movable jaw, and a swing mechanism attached to the other end of the tool body. A rocking position where one dimension of the pressure lever is closest to one end of the tool body. The rocking body can be swung with respect to the tool body in a predetermined angle range from a position where the rocking body abuts on a predetermined position of the rocking body and restrains the rocking motion of the rocking body to a position where there is no interference with the rocking body. When the moving body swings around the pressing lever swinging center in the same direction as the rotating direction with respect to the swinging body swinging center when moving away from one end of the tool body, the moving body is directed to a position for restraining the swinging motion of the swinging body, And the one-around direction , Upon swinging the pressing lever swings around the center in the other direction around the opposite, in which are disposed toward the interference no positions of the oscillator.
[0014]
As described above, in the present invention, the movable jaw portion that can adjust the distance with respect to the fixed jaw portion at one end portion of the tool body is provided on the swinging body so as to be swingable. If necessary, place a pressing lever to limit the fixed jaw so that the fixed jaw is positioned on the upper side and the movable jaw is positioned on the lower side in the direction in which the bolt or nut is to be rotated when viewed from the opening side. If a bolt or nut is sandwiched between the movable jaw and the movable jaw, and the pressure lever is moved in the desired rotation direction in which the bolt or nut is to be rotated, the pressure lever abuts on the rocking body and fixes it. When the pressing lever is moved in the direction opposite to the desired rotation direction, the rocking body is not restrained, and the bolt or nut accompanying the movement of the pressing lever Direction of reaction force and movable jaw The swinging direction of the swinging body is substantially the same, and the movable jaw and the swinging body swing smoothly with respect to the reaction force regardless of the magnitude of the reaction force, and move with the fixed jaw part of the bolt or nut. As the ratchet wrench is rotated by allowing the relative rotation between the jaws, while the bolt or nut is rotated in the desired direction, it is pressed when the pressing lever reaches the rotation operation limit in the desired direction in the work space. The lever can be returned once and the pressing lever can be operated repeatedly. There is no co-rotation of the bolt or nut during the returning operation of the pressing lever, and the entire tool can be reliably idled with respect to the bolt or nut. Rotating repeatedly to fasten and loosen quickly, improving work efficiency and adjusting the distance between the fixed jaw and the movable jaw to make various two-sided bolts and nuts Without problems can respond, time to replace the tool also becomes unnecessary, can quickly run the entire work.
[0015]
In addition, the tool according to the present invention is provided with a pressing lever in a state where the swinging body is positioned at the swinging position closest to the one end of the tool body and the swinging operation is restrained by the pressing lever as necessary. The contact portion is positioned on a straight line passing through the swing center of the swing body, and the contact portion with the swing body at a position where the pressing lever restrains the swing operation of the swing body at one end. The surface is perpendicular to the straight line passing through the swing center of the pressing lever.
[0016]
Thus, in the present invention, the contact portion with the pressing lever in the restrained state of the swinging body is located on a straight line passing through the swing center of the swinging body, and the contact portion with the swinging body at one end of the pressing lever is The surface is perpendicular to the straight line that passes through the center of swing of the pressing lever. When one end of the pressing lever is brought into contact with the swinging body, the swinging body and the pressing lever can be brought into close contact with each other without any deviation. By placing the pivot center of the pressure lever on the extension line of the force vector applied to the pressure lever contact surface from the moving object side, the pressure in the contact state without any unnecessary movement such as the movement of the pressure lever The rocking body is strongly supported by the lever alone, so that the fixed state of the rocking body can be reliably maintained, and there is no need for the worker to maintain the pressing lever in this contact position for restraining the rocking body. Push Is Fumuke force applied to the lever with the rotation of all the bolts or nuts, allows efficient work.
[0017]
In addition, the tool according to the present invention has a predetermined position adjacent to the side closer to the swing center with respect to the contact portion with the pressing lever in a state where the swinging body is restrained by the pressing lever, if necessary. The range portion is notched in a concave shape to the extent that it does not overlap at least the swinging movement path of one end of the pressing lever that swings in the other circumferential direction and is separated from the contact portion.
[0018]
Thus, in the present invention, a part of the oscillating body is notched so that the pressing lever and the oscillating body separated from the contact portion of the oscillating body in the oscillating body restrained state do not interfere with each other immediately after the restraint of the oscillating body is released. By suppressing the amount of rocking displacement after the rocking body restraint of the pressing lever is released, the rocking angle range of the pressing lever with respect to the tool body can be set small. The displacement of the pressing lever until the entire tool including the lever is moved can be reduced, and in the actual work space, the effective rotation operation range of the entire tool that can move the entire tool as a whole can be expanded by the pressing lever. Can be improved.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a tool according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view of a tool according to the present embodiment, FIG. 2 is a plan view and a partially omitted left side view of the tool according to the present embodiment, and FIG. 3 is an explanation of a nut tightening state of the tool according to the present embodiment. 4 and FIG. 4 are explanatory diagrams of the starting state of the return rotation operation of the tool according to this embodiment, and FIG. 5 is an explanatory view of the return rotation operation of the tool according to this embodiment.
[0020]
In each of the drawings, a tool 1 according to the present embodiment includes a tool body 10 integrally formed with a fixed jaw portion 11 that can come into contact with a hexagon head side surface or a hexagon nut side surface of a hexagon bolt, and the tool body 10. An oscillating body 20 that is slidably mounted at a position away from the fixed jaw 11 by a predetermined dimension, a movable jaw 30 that is slidably disposed on the oscillating body 20, and the movable jaw 30 that is connected to the oscillating body 20. A positioning mechanism 40 that restricts the movement of the movable jaw 30 with respect to the rocking body 20 by an external force applied to the movable jaw 30, and a pressure lever that is swingably attached to the other end of the tool body 10. 50.
[0021]
The tool body 10 is integrally formed with a tapered fixed jaw portion 11 having a flat surface portion 11a that is brought into contact with a hexagon head side surface or a hexagon nut side surface of a hexagon bolt at one end portion. A support portion 12 that supports the swinging body 20 in a swingable manner is provided in the vicinity, and a support portion 13 that supports the pressing lever 50 in a swingable manner is provided in the other end portion. A pin 14 that restricts the swing range of the pressing lever 50 is disposed on the other end side of the tool body 10.
[0022]
The oscillating body 20 engages with the support portion 12 of the tool body 10 and can oscillate within a predetermined angle range from a position near the fixed jaw 11 of the tool body 10 to a position near the other end of the tool body 10. The position of the movable jaw 30 on the rocking body 20 is changed from a state in which the movable jaw 30 is opposed to the plane of the fixed jaw 11 in parallel to a state in which the planar portions are inclined to each other with a wider interval.
[0023]
The oscillating body 20 is positioned closest to the fixed jaw portion 11 of the tool body 10, and the oscillating body 20 has a pressed portion 21 at the end located on a straight line passing through the oscillating center of the oscillating body 20 and one end of the pressing lever 50. When the one end of the pressing lever 50 is brought into contact with the pressed portion 21 as necessary, for example, when tightening a bolt or a nut, the rocking body 20 and the pressing lever 50 can be contacted. It is possible to obtain a tight contact state without causing any lateral displacement or the like, and the force to swing the swinging body 20 is received by the pressing lever 50 without fail, so that the swinging body 20 can be reliably secured. Can be restrained.
Further, the swinging body 20 overlaps a swinging operation path at one end of the pressing lever 50 away from the pressed part 21 in a predetermined range adjacent to the pressed part 21 near the swinging center. In this configuration, the groove is cut into a concave shape so as not to interfere with the pressing lever 50.
[0024]
The movable jaw 30 has a flat surface portion 31 that can come into contact with the side surface of the bolt or nut, and the flat surface portion 31 is in a swing position where the swing body 20 is closest to the fixed jaw portion 11. It is configured to be slidably disposed on the rocking body 20 so that the distance from the fixed jaw portion 11 can be adjusted while maintaining the state of facing the flat portion 11a of the fixed jaw portion 11 in parallel. The movable jaw 30 comes into contact with the opposite side of the side that comes into contact with the fixed jaw 11 of the bolt or nut, so that the bolt or nut can be clamped. A weak spring (not shown) is provided between the oscillating body 20 and the tool body 10 to urge the oscillating body 20 toward the fixed jaw portion 11 toward the support portion 12 center. Even when no external force is applied, the fixed jaw portion 11 and the movable jaw portion 30 are parallelly opposed to each other, and the fixed jaw portion 11 and the movable jaw portion 30 with respect to the bolt or nut to be sandwiched are obtained. It is easy to adjust the interval.
[0025]
With respect to the structure of the oscillating body 20 and the movable jaw 30, the conventional tool described in each of the above-mentioned patent documents fixes a movable part that changes the opening width in order to realize idling of only the tool with respect to the bolt or nut. It is a structure that slides linearly with respect to the part or slides along a predetermined constrained path, and when the movable part returns to the direction of narrowing the opening width from a state where the opening width is temporarily expanded. When part of the force is applied from a bolt, nut, etc., a rotating moment is generated in the moving part, causing a catch at the sliding part and facilitating stopping, and as a countermeasure against this catch, return using a relatively strong spring It was a mechanism to force movement. Compared with these, the movable part (oscillator 20 and movable jaw 30) of the present embodiment has a simple structure that swings around the support part 12, and when a part of the force is applied, the support part 12 is moved as it is. Since it only swings without being caught as a rotation moment around the center, there is no need to use a powerful spring to force the operation, and a large load resistance when the biasing force of the spring widens the opening width This is advantageous in terms of preventing co-rotation.
[0026]
The positioning mechanism 40 continues in the sliding direction of the movable jaw 30 and the worm portion 41 rotatably disposed on the rocking body 20 around a rotation axis parallel to the sliding direction of the movable jaw 30. This is a known worm gear mechanism including a worm rack portion 42 that is integrally formed with the movable jaw portion 30 and will not be described in detail. By rotating the worm part 41, the movable jaw part 30 can be appropriately slid with respect to the rocking body 20. On the other hand, the worm part 41 cannot be driven from the worm rack part 42 side by an external force applied to the movable jaw part 30. This is a mechanism that can restrict unnecessary movement of the movable jaw 30 with respect to the rocking body 20 due to the above characteristics.
[0027]
The pressing lever 50 is capable of swinging within a predetermined angle range engaged with the support portion 13 of the tool body 10 and restrained by the pin 14, and is positioned closer to the fixed jaw portion 11 than the swing center position. The movement of the oscillating body 20 interferes with the movement of the oscillating body 20 from an angular position where one end of the oscillating body 20 comes into contact with the pressed portion 21 of the oscillating body 20 closest to the fixed jaw 11 and restricts the oscillation of the oscillating body 20. It is a structure that can be swung to an angular position that does not.
[0028]
The contact surface of the one end of the pressing lever 50 with the pressed portion 21 of the rocking body 20 is formed so that the normal line of the contacting surface passes through the center of swinging of the pressing lever 50 (see FIG. 1). When the pressing lever 50 and the rocking body 20 are brought into contact with each other, the rocking center of the pressing lever 50 is positioned on the extension line of the force vector applied to the pressing lever 50 contact surface from the rocking body 20 side. Even if a force is applied from 20 to the pressing lever 50, no effort is required to maintain the operator's pressing lever 50 in this contact position, and there is an unnecessary movement around the support portion 13 of the pressing lever 50. In addition, the oscillating body 20 can be strongly supported only by the presence of the pressing lever 50 and the fixed state of the oscillating body 20 can be reliably maintained, and all the force applied to the pressing lever 50 by the operator can be directed to the rotation of the bolt or nut. Can
[0029]
Further, since the pressing lever 50 can appropriately maintain the state closest to the fixed jaw portion 11 of the oscillating body 20, the spring can be used to maintain the fixed jaw portion 11 and the movable jaw portion 30 in a parallel state during the operation. The urging force of the oscillating body 20 is not required at all, the spring force for urging the oscillating body 20 toward the fixed jaw 11 can be minimized, and the spring serving as a load resistance when the opening width is widened. The urging force is extremely small, and it is a mechanism that can reliably prevent co-rotation.
[0030]
Next, the usage state of the tool based on the said structure is demonstrated. First, when tightening the nut 60, it is desired to rotate the nut 60 as viewed from the opening side formed by the fixed jaw portion 11 and the movable jaw portion 30 with a sufficient space between the fixed jaw portion 11 and the movable jaw portion 30. The fixed jaw 11 is positioned on the upper side of the direction and the movable jaw 3 is positioned on the lower side, that is, on the left side of the nut 60 to be rotated in the clockwise direction on the tightening side as shown in FIG. The movable jaw 30 is positioned on the right side of the nut 60 and the nut 60 is sandwiched between the fixed jaw 11 and the rocking body 20 closest to the fixed jaw 11 so that the fixed jaw 11 and the movable jaw 30 are parallel to each other. In the state of being opposed to each other, the position of the movable jaw 30 is adjusted by operating the worm portion 41 of the positioning mechanism 40, and the fixed jaw 11 and the movable jaw 30 are brought into close contact with the side surface of the nut 60.
[0031]
In this state, when the pressure lever 50 is gripped and the pressure lever 50 is rotated clockwise about the nut 60, the pressure lever 50 first swings clockwise with respect to the tool body 10 and one end of the pressure lever 50. The portion comes into contact with the pressed portion 21 at the end of the oscillating body 20, and the movement of the oscillating body 20 is constrained so that the oscillating body 20 cannot be oscillated (see FIG. 3A). Thereby, the position of the movable jaw part 30 is also fixed, the distance between the fixed jaw part 11 and the movable jaw part 30 is maintained, and the fixed jaw part 11 and the movable jaw part 30 are kept in contact with the side surface of the nut 60. . Thereafter, the entire tool 1 is rotated in accordance with the further clockwise rotation operation of the pressing lever 50, and the nut 60 can be rotated integrally with the tool 1 and tightened.
[0032]
On the other hand, when there is an obstacle or the like, the pressing lever 50 cannot be rotated further clockwise, and the pressing lever 50 is rotated counterclockwise with respect to the nut 60 to return the pressing lever 50. First, the pressing lever 50 swings counterclockwise with respect to the tool body 10, one end of the pressing lever 50 moves away from the pressed portion 21 of the swinging body 20 to release the fixed state of the swinging body 20. It will be in the state which can be rock | fluctuated in the direction away from the fixed jaw part 11. FIG.
[0033]
As the pressing lever 50 is further returned and rotated, the pressing lever 50 reaches the swing limit with respect to the tool body 10 (see FIG. 4), and shifts to a state in which the entire tool 1 is rotated counterclockwise. Then, relative to the fixed jaw portion 11 and the movable jaw portion 30 which are about to rotate counterclockwise with respect to the nut 60, the nut 60 rotates in a clockwise direction so as to maintain the stopped state.
[0034]
Here, the relative movement direction of the nut 60 corner portion along the relative rotation of the nut 60 (the direction of the broken line arrow A in FIGS. 4 and 5A) and the swinging body in the movable jaw 30 in contact with the nut 60 corner portion. In addition to the fact that the movement direction associated with the rocking of the nut 20 is substantially the same, the contact position between the nut 60 and the movable jaw 30 is away from the rocking center of the rocking body 20. Even if the reaction force transmitted from the 60 corners to the movable jaw 30 is small, the movable body 30 and the movable jaw 30 together with the movable jaw 30 against the biasing force of a spring (not shown) that biases the rocking body 20 toward the fixed jaw 11 side. 20 can be moved sufficiently.
[0035]
In this way, the movable jaw 30 and the swinging body 20 that are in contact with the corner of the nut 60 to be rotated relative to each other and receive the reaction force toward the opening side are separated from the fixed jaw 11 (the solid arrow in FIG. 5A). B) smoothly moving in the direction B), and the relative rotation of the nut 60 between the fixed jaw portion 11 and the movable jaw portion 30 is allowed, and the entire tool 1 is moved relative to the nut 60 without rotating the nut 60 together with the tool 1. It idles (see FIG. 5). During the idling of the entire tool 1, the swinging body 20 and the movable jaw are also moved when the movable jaw 30 and the swinging body 20 return to approach the fixed jaw 11 with the movement of the corner position associated with the relative rotation of the nut 60. The portion 30 can be smoothly swung around the support portion 12 without causing mechanical problems such as catching, and the movable jaw portion 30 can be kept in contact with the nut 60, and the tool 1 can be rotated as a whole. It is continued smoothly without being separated from the nut 60.
[0036]
If the pressing lever 50 is returned to a state where a sufficient amount of clockwise rotation can be secured by the counterclockwise return rotation operation as it is, the pressing lever 50 is rotated clockwise with respect to the nut 60 again in the same manner as described above, and the fixed jaw While maintaining the state in which the portion 11 and the movable jaw 30 are in close contact with the opposing two side surfaces of the nut 60, the nut 60 can be rotated integrally with the tool 1 to perform tightening, and thereafter the same operation is repeated. Thus, the tightening operation of the nut 60 can be repeated without completely removing the tool 1 from the nut 60.
[0037]
Conversely, when loosening the nut 60, the front and back of the tool 1 are reversed, the fixed jaw 11 is positioned on the right side of the nut 60 and the movable jaw 30 is positioned on the left side of the nut 60, and the nut 60 is sandwiched and pressed. When the lever 50 is gripped and the pressure lever 50 is rotated counterclockwise on the loose side with respect to the nut 60, the rocking body 20 is restrained and fixed by the pressure lever 50 as in the tightening operation in the tightening operation. Thereby, the fixed jaw part 11 and the movable jaw part 30 can maintain the contact state with the nut 60, and the nut 60 can be rotated integrally and can be loosened. Then, the pressure lever 50 can no longer be rotated counterclockwise due to the presence of an obstacle or the like, and when the pressure lever 50 is rotated counterclockwise with respect to the nut 60 and the pressure lever 50 is returned, the tightening is performed. As in the returning operation in the work, one end of the pressing lever 50 is separated from the pressed portion 21 of the oscillating body 20 to release the oscillating body 20, and the corner of the nut 60 that rotates relative to the tool 1 to maintain the stopped state. The movable jaw 30 and the oscillating body 20 receiving the reaction force to the opening side in contact with the portion move smoothly, and the entire tool 1 rotates with respect to the nut 60 without rotating the nut 60 together with the tool 1. The pressing lever 50 can be returned to the position where a sufficient amount of rotation in the counterclockwise direction is obtained, and the loosening operation can be repeated.
[0038]
Thus, in the tool according to the present embodiment, the movable jaw 30 is provided on the swinging body 20 so as to be swingable while the distance can be adjusted with respect to the fixed jaw 11 at one end of the tool body 10. A pressing lever 50 that restricts the swinging of the movable jaw 30 and the swinging body 20 is provided as necessary, and the fixed jaw 11 and the lower side are positioned on the upper side in the direction in which the nut 60 is to be rotated as viewed from the opening side. When the movable jaw 30 is positioned on the nut 60 and the nut 60 is sandwiched between the fixed jaw 11 and the movable jaw 30 and the pressing lever 50 is moved in the desired rotation direction to rotate the nut 60, the pressing lever 50 is swung. The moving body 20 contacts and is fixed, and the nut 60 is securely held and rotated integrally. On the other hand, when the pressing lever 50 is moved in the direction opposite to the desired rotation direction, the rocking body 20 is restrained. Without the movement of the pressing lever 50 Since the movable jaw 30 and the swinging body 20 swing smoothly with respect to the reaction force from the nut 60, the relative rotation between the fixed jaw 11 and the movable jaw 12 of the nut 60 is allowed. During the tightening or loosening operation on the nut 60, when the pressing lever 50 reaches the rotation operation limit in the desired direction in the work space, the pressing lever 50 can be returned once and the pressing lever 50 can be operated repeatedly. The nut 60 can be rotated in only a desired direction and the tightening and loosening operations can be quickly performed by rotating the nut 60 only in a desired direction, and the work efficiency can be improved. Can handle wide bolts and nuts, eliminating the need to replace tools.
[0039]
In the tool according to the embodiment, a predetermined range portion adjacent to the side closer to the swing center with respect to the pressed portion 21 at the end of the swing body 20 is formed in a concave shape so that interference with the press lever 50 does not occur. However, the present invention is not limited to this, and as shown in FIGS. 6 and 7, the contact portion (the pressed portion 21) with the pressing lever 50 in the restrained state of the rocking body 20 is the rocking of the rocking body 20. While being located on a straight line passing through the center, the feature that the contact portion with the rocking body 20 at one end of the pressing lever 50 is a plane orthogonal to the straight line passing through the rocking center of the pressing lever 50 is left as it is. It is also possible to change the positional relationship in which the contact between the pressure lever 20 and the pressing lever 50 occurs so that interference with the pressing lever 50 can be avoided without providing a notch portion in the oscillator 20. In any of the above forms, the oscillating body 20 is based on the reaction force applied to the movable jaw 30 from the corner of the nut 60 as the contact position of the nut 60 corner and the movable jaw 30 is further away from the center of oscillation of the oscillating body 20. The force to move the rocking body 20 is larger than the spring force that urges the rocking body 20 toward the fixed jaw 11, and the rocking body 20 can be moved even if the reaction force from the nut 60 is weak. For this reason, from the viewpoint of preventing co-rotation of the bolts and nuts during the return operation, the position of the support portion 12 serving as the swing center of the swing body 20 in the tool body 10 is separated from the fixed jaw portion 11 as much as possible. It is desirable to be close to the department.
[0040]
Further, in the tool according to the embodiment, the contact portion with the pressing lever 50 in the restrained state of the oscillating body 20 is located on a straight line passing through the oscillating center of the oscillating body 20, and the oscillating portion at one end of the pressing lever 50 is. The contact portion with the moving body 20 is configured to be a surface orthogonal to a straight line passing through the swing center of the pressing lever 50. However, the present invention is not limited to this, and the pressing lever 50 and the swinging body 20 are in a restrained state. Each contact portion may be formed to have a desired positional relationship. In this case, a part of the force applied to the operator's press lever 50 is used to bring the press lever 50 into this contact state. If the force applied to the pressing lever 50 by the operator is the same, the pressing lever 5 is moved further away from the center of swinging of the rocking body 20 when the force applied to the pressing lever 50 is the same. As the length from the rocking center of the pressing lever 50 on one end side becomes smaller than the length from the rocking center of the pressing lever 50 on the other end of the pressing lever 50, the rocking body 20 is pressed more strongly against the fixed jaw 11 side. It will be possible to hold it in the state.
[0041]
Further, in the tool according to the above-described embodiment, the swinging body 20 is partially cut out in a concave shape so as to avoid interference with one end portion of the pressing lever 50. A predetermined range in the vicinity of the contact portion with the rocking body 20 is cut out in a concave shape to the extent that it does not overlap with the rocking motion path of the rocking body 20 that rocks in a direction away from one end of the tool body 10 when the constraint is released. Since it is possible to prevent the interference between the pressing lever 50 and the swinging body 20 and to suppress the swing displacement amount after the restraint of the swinging lever of the pressing lever 50 is released, the tool body of the pressing lever 50 can be suppressed. The swing angle range with respect to 10 can be set small, and in the actual work space, the operation range in which the entire tool can be moved integrally by the pressing lever 50 can be expanded, and work efficiency can be improved.
[0042]
Further, in the tool according to the embodiment, the worm portion 41 which is attached to the rocking body 20 and forms the positioning mechanism 40 causes the movable jaw 30 to be moved upward by rotating the tool surface side in the drawings. In addition to this, the worm part 41 is arranged on the rocking body 20 in the opposite direction, and the movable jaw part 30 is fixed to the fixed jaw by the same operation with respect to the worm part 41. The relationship between the rotation direction of the worm part 41 and the sliding direction of the movable jaw part 30 may be set in any way, for example, by moving it in the direction of narrowing the gap with the part 11.
[0043]
In the tool according to the embodiment, the fixed jaw portion 11 and the movable jaw portion 30 are configured to face each other in parallel with each other in a normal state where no external force is applied. A predetermined urging means for urging the oscillating body 20 in a direction away from the fixed jaw 11 so that the fixed jaw 11 and the movable jaw 30 are slightly opened from parallel in a normal state in which no tool is applied. It can also be set as the structure arrange | positioned between the main body 10 and the rocking | swiveling body 20. FIG. In this case, the fixed jaw 11 and the movable jaw 30 in a state opened from parallel are formed by forming a large number of minute irregularities having a substantially wave-like cross section at the innermost part with respect to the opening side of the fixed jaw 11 and the movable jaw 30. When the pressing lever 50 is rotated with the rotating object sandwiched between the concavo-convex portions of 30, the rotating object can be rotated and tightened and loosened in the same manner as a conventionally known so-called pipe wrench. Can be added.
[0044]
In the tool according to the above-described embodiment, the pressing lever 50 is configured to be swingably attached to the tool body 10 while limiting the angle range. A stopper that is fixed to the tool body 10 can be arranged so that the pressing lever 50 does not swing with respect to the tool body 10, and a work space in which the tool can be fully rotated is obtained. When it is not necessary to idle the nut, the pressing lever 50 is fixed in contact with the oscillating body 20, and both the oscillating body 20 can be used in the same manner as a conventionally known monkey wrench while suppressing unnecessary oscillation.
[0045]
In the tool according to the embodiment, the pressing lever 50 is in a contact state between one end of the pressing lever 50 and the pressed portion 21 of the rocking body 20, and the other end of the pressing lever 50 is the other end of the tool body 10. However, in addition, the pressing lever 50 is in a contact state between one end of the pressing lever 50 and the pressed portion 21 of the rocking body 20. The shape of the pressing lever 50 can also be set so that the other end side is largely displaced in the direction in which the movable jaw 30 is present with respect to the fixed jaw 11 with respect to the extension direction of the other end of the tool body 10. When the bolt or nut is tightened (or loosened) in a place where the operation space of the pressing lever 50 is not sufficient in the normal lever shape, such as a corner portion sandwiched between the bolts, the tightening (or loosening) of the pressing lever 50 is performed. Only becomes be spread largely by the amount that displacement of the lever end side white rotation direction is enhanced work efficiency by securing the rotation angle of the entire tool to the maximum.
[0046]
【The invention's effect】
As described above, according to the present invention, the movable jaw portion that can adjust the distance with respect to the fixed jaw portion at one end portion of the tool body is provided on the swinging body to be swingable. A pressing lever that restricts swinging as necessary is provided, and fixed so that the fixed jaw is positioned on the upper side and the movable jaw is positioned on the lower side in the direction in which the bolt or nut is to be rotated when viewed from the opening side. When a bolt or nut is sandwiched between the jaw part and the movable jaw part and the pressing lever is moved in the desired rotation direction in which the bolt or nut is to be rotated, the pressing lever comes into contact with the rocking body and fixes it. The nut and the nut can be securely held and rotated integrally. On the other hand, if the pressing lever is moved in the direction opposite to the desired rotation direction, the rocking body is not restrained, and the bolt or Direction of reaction force from the nut and movable jaw The swinging direction of the swinging body is substantially the same, and the movable jaw and the swinging body swing smoothly with respect to the reaction force regardless of the magnitude of the reaction force, and move with the fixed jaw part of the bolt or nut. As the ratchet wrench is rotated by allowing the relative rotation between the jaws, while the bolt or nut is rotated in the desired direction, it is pressed when the pressing lever reaches the rotation operation limit in the desired direction in the work space. The lever can be returned once and the pressing lever can be operated repeatedly. There is no co-rotation of the bolt or nut during the returning operation of the pressing lever, and the entire tool can be reliably idled with respect to the bolt or nut. Rotating repeatedly to fasten and loosen quickly, improving work efficiency and adjusting the distance between the fixed jaw and the movable jaw to make various two-sided bolts and nuts Without problem can handle, trouble of replacing the tool also becomes unnecessary, there is an effect that can quickly perform the entire task.
[0047]
According to the present invention, the contact portion with the pressing lever in the restrained state of the swinging body is located on a straight line passing through the swing center of the swinging body, and the contact portion with the swinging body at one end of the pressing lever is The surface is perpendicular to the straight line that passes through the center of swing of the pressing lever. When one end of the pressing lever is brought into contact with the swinging body, the swinging body and the pressing lever can be brought into close contact with each other without any deviation. By placing the pivot center of the pressure lever on the extension line of the force vector applied to the pressure lever contact surface from the moving object side, the pressure in the contact state without any unnecessary movement such as the movement of the pressure lever The rocking body is strongly supported by the lever alone, so that the fixed state of the rocking body can be reliably maintained, and there is no need for the worker to maintain the pressing lever in this contact position for restraining the rocking body. Is pressing lever Is Fumuke the force applied to the rotation of all the bolts or nuts, having the effect of efficiently perform the task.
[0048]
Further, according to the present invention, a part of the oscillating body is notched so that the pressing lever and the oscillating body separated from the contact portion of the oscillating body in the oscillating body restraint state do not interfere with each other immediately after the restraint of the oscillating body is released. By suppressing the amount of rocking displacement after the rocking body restraint of the pressing lever is released, the rocking angle range of the pressing lever with respect to the tool body can be set small. The displacement of the pressing lever until the entire tool including the lever is moved can be reduced, and in the actual work space, the effective rotation operation range of the entire tool that can move the entire tool as a whole can be expanded by the pressing lever. It has the effect of improving.
[Brief description of the drawings]
FIG. 1 is a front view of a tool according to an embodiment of the present invention.
FIG. 2 is a plan view and a partially omitted left side view of a tool according to an embodiment of the present invention.
FIG. 3 is an explanatory diagram of a nut tightening state of a tool according to an embodiment of the present invention.
FIG. 4 is an explanatory diagram of a starting state of return rotation operation of a tool according to an embodiment of the present invention.
FIG. 5 is an explanatory diagram of a return rotation operation of a tool according to an embodiment of the present invention.
FIG. 6 is a front view of a tool according to another embodiment of the present invention.
FIG. 7 is an explanatory view of a return rotation operation of a tool according to another embodiment of the present invention.
[Explanation of symbols]
1 Tool
10 Tool body
11 Fixed jaw
11a Plane part
12, 13 Support part
14 pin
20 Oscillator
21 Pressed part
30 Movable jaw
31 Flat part
40 Positioning mechanism
41 Worm part
42 Warm rack
50 Pressing lever
60 nuts

Claims

A tool body formed at one end with a fixed jaw portion having a flat portion capable of coming into contact with the hexagon head side surface of the hexagon head bolt or the side surface of the hexagon nut;
The tool body is mounted on the side of the tool body facing the flat surface, and is swingably mounted about an axis parallel to the flat surface of the fixed jaw portion at a predetermined distance from the fixed jaw portion of the tool body. A swinging body that swings within a predetermined angle range from a predetermined position near the one end of the tool to a predetermined position near the other end of the tool body;
A flat portion capable of abutting against a hexagonal head side surface of the hexagon head bolt or a side surface of the hexagon nut, and at the swing position closest to the one end portion of the tool body of the swing body, the flat portion of the fixed jaw portion A movable jaw that is disposed substantially parallel to the planar portion and is slidably disposed in the normal direction of the planar portion on the oscillator;
A positioning mechanism that is disposed between the rocking body and the movable jaw, and that displaces the movable jaw relative to the rocking body, while restricting the movement of the movable jaw with respect to the rocking body due to an external force applied to the movable jaw;
A pressing lever attached to the other end of the tool main body so as to be swingable, and having a small dimension from one end to the swing center position compared to the dimension from the other end to the swing center position;
From the position where one end side of the pressing lever abuts a predetermined position of the rocking body which is the rocking position closest to the one end of the tool body and restrains the rocking motion of the rocking body, there is interference with the rocking body. It is possible to oscillate with respect to the tool body in a predetermined angle range up to a position where there is no position, and when the oscillating body moves away from one end of the tool body, it is the same rotation direction as the oscillating body oscillating center around the pressing lever oscillating center. Swinging around the center of the pressing lever in another rotational direction opposite to the one direction of rotation, A tool characterized by being arranged toward a position where there is no interference.

The tool according to claim 1, wherein
The rocking body passes through the rocking center of the rocking body through a contact portion with the pressing lever in a state where the rocking position is closest to one end of the tool body and the rocking operation is restrained by the pressing lever. On a straight line,
The pressing lever has a contact portion with the rocking body at a position that restrains the rocking motion of the rocking body at one end, and is a plane orthogonal to a straight line passing through the rocking center of the pressing lever. A tool.

In the tool according to claim 1 or 2,
The rocking body rocks a predetermined range portion adjacent to the side closer to the rocking center with respect to the contact portion with the pressing lever in a state where the rocking motion is restrained by the pressing lever in the other rotation direction. The tool is cut out in a concave shape to the extent that it does not overlap at least with the swinging movement path of one end of the pressing lever away from the contact portion.