JP3430199B2

JP3430199B2 - Two-axis rotating device with one operation axis

Info

Publication number: JP3430199B2
Application number: JP20652898A
Authority: JP
Inventors: 大士藤山; 愿二岡田
Original assignee: Kubota Corp
Current assignee: Kubota Corp
Priority date: 1998-07-22
Filing date: 1998-07-22
Publication date: 2003-07-28
Anticipated expiration: 2018-07-22
Also published as: JP2000035154A

Description

【発明の詳細な説明】【０００１】【発明の属する技術分野】本発明は、副弁内蔵形バタフ
ライ弁の開閉装置などに好適な１つの操作軸による２軸
回転装置に関する。【０００２】【従来の技術】副弁内蔵形バタフライ弁は、図１０ない
し図１２に示すように、弁箱１と、この弁箱１に開閉自
在に収容された主弁体２と、主弁体２に開閉自在に収容
された副弁体３を備えている。主弁体２には上弁棒４と
下弁棒５が固着されている。上弁棒４は軸線Ｃ方向の貫
通孔６を設けた筒状のもので、弁箱１の上側軸支部７に
よって軸線Ｃまわりの回転自在、かつ気密に支持されて
上側軸支部７の上方に突出している。下弁棒５は弁箱１
の下側軸支部８によって軸線Ｃまわりの回転自在、かつ
気密に支持されており、上弁棒４および下弁棒５の軸線
Ｃまわりの正逆方向の回転によって、主弁体２が弁箱１
の通路を開閉する。【０００３】副弁体３には上弁棒９と下弁棒１０が固着
され、上弁棒９は主弁体２に設けた副弁箱１１の上側軸
支部１２によって軸線Ｃまわりの回転自在、かつ気密に
支持されて上側軸支部１２の上方に突出している。下弁
棒１０は副弁箱１１の下側軸支部１３によって軸線Ｃま
わりの回転自在、かつ気密に支持されている。【０００４】主弁体２の上弁棒４に設けた軸線Ｃ方向の
貫通孔６には、上端部を上弁棒４の上方に突出させた軸
１４が軸線Ｃまわりの回転自在に挿通され、この軸１４
の下端部と副弁体３の上弁棒９の上端部がカップリング
１５を介して同時回転可能に互いに連結されている。【０００５】弁箱１における上側軸支部７にはスタンド
１６を介して２軸回転装置１７が載置される。２軸回転
装置１７は、２つの操作軸１８、１９により、主弁体２
の上弁棒４と副弁体３側の軸１４との２軸を回転させる
ためのもので、前記軸線Ｃと同心の軸線を有する第１ギ
ヤケース２０と、この第１ギヤケース２０の一側に取付
けられた第２ギヤケース２１とを有し、第１ギヤケース
２０の下端部がスタンド１６に固定され、第１ギヤケー
ス２０の上端開口部はカバー２２によって着脱可能に閉
塞されている。【０００６】一方の操作軸１８は、主弁体２の上弁棒４
を軸線Ｃまわりの正逆方向に回転させるためのもので、
図１３および図１４に示すように、第２ギヤケース２１
の一端部に設けた軸支部２３によって軸線Ｃ１まわりの
回転自在、かつ気密に支持されて軸支部２３の上方に突
出しており、一方の操作軸１８の軸線Ｃ１まわりの回転
は、ベベルピニオン２４Ａ、ベベルギヤ２４Ｂ、ピニオ
ン２４Ｃ、スパーギヤ２４Ｄなどの歯車列２４を介して
水平方向のウオーム軸２５に伝達され、ウオーム軸２５
の回転は該ウオーム軸２５に設けたウオーム２６を介し
て、軸線Ｃと同心の軸線を有するウオームホイール２７
に伝達される。ウオームホイール２７は第１ギヤケース
２０とカバー２２によって軸線Ｃまわりに回転自在に支
持されたホイールボス２８に固着され、このホイールボ
ス２８の中心孔２８Ａに主弁体２における上弁棒４の上
端部を嵌合して、たとえばキー（図示省略）により同時
回転可能に結合している。【０００７】他方の操作軸１９は、軸１４およびカップ
リング１５を介して副弁体３の上弁棒９を軸線Ｃまわり
の正逆方向に回転させるためのもので、図１４に示すよ
うに、カバー２２の中心孔２２Ａを着脱可能に閉塞して
いるステムカバー２９によって軸線Ｃまわりの回転自
在、かつ気密に支持されてステムカバー２９の上方に突
出しており、他方の操作軸１９に設けた軸線Ｃ方向の盲
貫孔３０に軸１４の上端部を嵌合して、たとえばテーパ
ピン（図示省略）により同時回転可能に結合されてい
る。【０００８】前記構成において、主弁体２と副弁体３が
全閉されている副弁内蔵形バタフライ弁の弁閉状態から
主弁体２と副弁体３とを全開した、副弁内蔵形バタフラ
イ弁の弁開状態を得る手順について説明する。【０００９】まず、他方の操作軸１９を弁開方向（たと
えば、投影平面上で反時計まわり）に回転させる。この
回転は軸１４とカップリング１５を介して副弁体３の上
弁棒９に伝達され、該上弁棒９、副弁体３および下弁棒
１０を同時に弁開方向に回転させて、副弁体３を全開す
ることができる。【００１０】副弁体３の全開によって、弁箱１の上流側
と下流側の差圧が小さくなった時点で、一方の操作軸１
８を弁開方向（たとえば、投影平面上で反時計まわり）
に回転させる。この回転はベベルピニオン２４Ａ、ベベ
ルギヤ２４Ｂ、ピニオン２４Ｃ、スパーギヤ２４Ｄなど
の歯車列２４→ウオーム軸２５→ウオーム２６→ウオー
ムホイール２７→ホイールボス２８の経路で主弁体２の
上弁棒４に伝達され、該上弁棒４、主弁体２および下弁
棒５を同時に弁開方向に回転させて、主弁体２を全開す
ることができる。【００１１】つぎに、主弁体２と副弁体３が全開されて
いる副弁内蔵形バタフライ弁の弁開状態から主弁体２と
副弁体３とを全閉した、副弁内蔵形バタフライ弁の弁閉
状態を得る手順について説明する。【００１２】まず、一方の操作軸１８を弁閉方向（たと
えば、投影平面上で時計まわり）に回転させる。この回
転はベベルピニオン２４Ａ、ベベルギヤ２４Ｂ、ピニオ
ン２４Ｃ、スパーギヤ２４Ｄなどの歯車列２４→ウオー
ム軸２５→ウオーム２６→ウオームホイール２７→ホイ
ールボス２８の経路で主弁体２の上弁棒４に伝達され、
該上弁棒４、主弁体２および下弁棒５を同時に弁閉方向
に回転させて、主弁体２を全閉することができる。【００１３】主弁体２の全閉によって、弁箱１の上流側
から下流側への流体の通過を大幅に制限したのち、他方
の操作軸１９を弁閉方向（たとえば、投影平面上で時計
まわり）に回転させる。この回転は軸１４とカップリン
グ１５を介して副弁体３の上弁棒９に伝達され、該上弁
棒９、副弁体３および下弁棒１０を同時に弁閉方向に回
転させて、副弁体３を全閉状態することができる。【００１４】このように、副弁内蔵形バタフライ弁で
は、主弁体２と副弁体３の弁閉状態から弁開状態への操
作順序は、．他方の操作軸１９の回転操作による副弁
体３の弁開、．一方の操作軸１８の回転操作による主
弁体２の弁開によってなされ、主弁体２と副弁体３の弁
開状態から弁閉状態への操作順序は、．一方の操作軸
１８の回転操作による主弁体２の弁閉、．他方の操作
軸１９の回転操作による副弁体３の弁閉によってなされ
れる。【００１５】【発明が解決しようとする課題】このため、２つの操作
軸を有する従来の２軸回転装置では、主弁体と副弁体の
弁開と弁閉に際して、その都度、２つの操作軸を特定し
た順序で弁開または弁閉方向に回転操作しなければなら
ず、操作が煩わしい欠点を有しているとともに、操作順
序を誤ると弁開時および弁閉時の操作力が著しく増大し
て、スムーズな弁開と弁閉が妨げられる難点を有してい
る。【００１６】そこで、本発明は、操作順序を考慮するこ
となく、単に、１つの操作軸の回転方向を特定するだけ
で、自動的に適正な操作順序に基づいて２軸を回転させ
るようにして、操作を容易にするとともに操作順序の誤
りを避けることができる１つの操作軸による２軸回転装
置を提供することを目的としている。【００１７】【課題を解決するための手段】前記目的を達成するため
に、本発明に係る１つの操作軸による２軸回転装置は、
主軸と、この主軸の軸線に沿って該主軸に挿通された副
軸との２軸を、１つの操作軸の回転によって前記主軸の
軸線まわりに正逆方向のそれぞれに特定した順序で回転
させる２軸回転装置であって、前記主軸と同時回転可能
に設けられている主軸側旋回アームと、前記副軸に回転
を伝達する回転伝達機構と、この回転伝達機構の入力側
回転部材に回転を入力する副軸側旋回アームと、主軸お
よび副軸の軸線に交差する軸線を有して回転自在に支持
されているとともに、外周に雄ねじを設けた１つの操作
軸と、この１つの操作軸の外周の雄ねじに螺合する雌ね
じ部を有し、１つの操作軸の第１回転方向および第２回
転方向に追従して該１つの操作軸の軸線方向に進退移動
する雌ねじコマと、この雌ねじコマに設けた一方の連繋
部とを備え、前記主軸側旋回アームには、前記１つの操
作軸の第１回転方向の回転に追従して前記雌ねじコマが
前進開始位置から前進終了位置の途中まで前進する間は
前記一方の連繋部に干渉せず、前記雌ねじコマが前記前
進の途中から前記前進終了位置まで前進する間は前記一
方の連繋部に干渉して該主軸側旋回アームを旋回させる
とともに、前記１つの操作軸の第２回転方向の回転に追
従して前記雌ねじコマが前進終了位置から前進開始位置
の途中まで後退する間は前記一方の連繋部に干渉して該
主軸側旋回アームを逆旋回させ、前記雌ねじコマが前記
後退の途中から前記前進開始位置まで後退する間は前記
一方の連繋部に干渉しない他方の第１連繋部が設けら
れ、前記副軸側旋回アームには、前記１つの操作軸の第
１回転方向の回転に追従して前記雌ねじコマが前進開始
位置から前進終了位置の途中まで前進する間は前記一方
の連繋部に干渉して該副軸側旋回アームを旋回させ、前
記雌ねじコマが前記前進の途中から前記前進終了位置ま
で前進する間は前記一方の連繋部に干渉せず該副軸側旋
回アームを停止させるとともに、前記１つの操作軸の第
２回転方向の回転に追従して前記雌ねじコマが前進終了
位置から前進開始位置の途中まで後退する間は前記一方
の連繋部に干渉せず該副軸側旋回アームを停止させ、前
記雌ねじコマが前記後退の途中から前記前進開始位置ま
で後退する間は前記一方の連繋部に干渉して該副軸側旋
回アームを逆旋回させる他方の第２連繋部が設けられて
いることを特徴としている。【００１８】本発明によれば、１つの操作軸を第１回転
方向に回転させることで、雌ねじコマが前進する。雌ね
じコマが前進開始位置から前進終了位置の途中まで前進
している間は、一方の連繋部に主軸側旋回アームの他方
の第１連繋部は干渉しないので、主軸側旋回アームおよ
び主軸は停止している。また、雌ねじコマが前進開始位
置から前進終了位置の途中まで前進している間は、一方
の連繋部に副軸側旋回アームの他方の第２連繋部が干渉
して、副軸側旋回アームを旋回させ、回転伝達機構を介
して副軸を回転させる。【００１９】１つの操作軸の第１回転方向への回転を継
続することで、雌ねじコマが前進途中から前進終了位置
まで前進する。この時、一方の連繋部に主軸側旋回アー
ムの他方の第１連繋部が干渉して、主軸側旋回アームを
旋回させ、同時に主軸を回転させる。また、雌ねじコマ
が前進途中から前進終了位置まで前進している間は、一
方の連繋部に副軸側旋回アームの他方の第２連繋部は干
渉しないので、副軸側旋回アーム、回転伝達機構および
副軸は停止している。【００２０】前記の状態において、１つの操作軸を第２
回転方向に回転させることで、雌ねじコマが後退する。
雌ねじコマが前進終了位置から前進開始位置の途中まで
後退している間は、一方の連繋部に主軸側旋回アームの
他方の第１連繋部が干渉して、主軸側旋回アームを逆旋
回させて元の位置に復帰させるとともに、主軸は逆回転
して元の位置に復帰する。また、雌ねじコマが前進終了
位置から前進開始位置の途中まで後退している間は、一
方の連繋部に副軸側旋回アームの他方の第２連繋部は干
渉しないので、副軸側旋回アーム、回転伝達機構および
副軸は停止している。【００２１】さらに１つの操作軸の第２回転方向への回
転を継続することにより、雌ねじコマが後退途中から前
進開始位置まで後退する。この時、一方の連繋部に主軸
側旋回アームの他方の第１連繋部は干渉しないので、主
軸側旋回アームおよび主軸は停止している。また、雌ね
じコマが後退途中から前進開始位置まで後退している間
は、一方の連繋部に副軸側旋回アームの他方の第２連繋
部が干渉して、副軸側旋回アームを逆旋回させて元の位
置に復帰させるとともに、回転伝達機構を介して副軸を
逆回転して元の位置に復帰させる。【００２２】【発明の実施の形態】以下、本発明の一実施の形態を図
面に基づいて前記従来の技術と同様に副弁内蔵形バタフ
ライ弁の開閉装置に適用した形態で説明する。したがっ
て、弁箱１、主弁体２、副弁体３、上弁棒４，９、下弁
棒５，１０、軸１４などの構造は従来例と同一であるの
で、図示を省略し、かつ図１０ないし図１４の従来例と
同一もしくは相当部分には同一符号を付す。【００２３】図１は本発明の一実施の形態を示す平面
図、図２は図１のＡ−Ａ線に沿う部分断面図、図３は図
１のＢ−Ｂ線に沿う部分断面図である。これらの図にお
いて、２軸回転装置１７は、主軸側旋回アーム３１と、
回転伝達機構３２と、副軸側旋回アーム３３と、上弁棒
４および軸１４の軸線に交差する軸線を有してケーシン
グ４１に回転自在に支持されているとともに、外周に雄
ねじ４０Ａを設けた１つの操作軸４０とを備えている。【００２４】主軸側旋回アーム３１のボス状の基部３１
Ａには、主弁体２における上弁棒４の上端部を嵌合し
て、キー３９により同時回転可能に互いに結合してい
る。【００２５】回転伝達機構３２は、軸１４の上端部を嵌
合してキー４２により同時回転可能に結合された出力側
小セクタ歯車３２Ａと、この出力側小セクタ歯車３２Ａ
に噛合する中間歯車３２Ｂおよび中間歯車３２Ｂに噛合
する入力側大セクタ歯車３２Ｃを備え、入力側大セクタ
歯車３２Ｃは、ケーシング４１に回転自在に立設した回
転軸４３に対してキー４４により結合されている。【００２６】副軸側旋回アーム３３のボス状の基部３３
Ａには、回転軸４３を嵌合して、キー４４により同時回
転可能に互いに結合している。【００２７】１つの操作軸４０の外周の雄ねじ４０Ａに
螺合する雌ねじ部３４Ａを有する雌ねじコマ３４が設け
られ、その両端部は１つの操作軸４０に平行に設けたガ
イド４５，４５を摺動自在に貫通している。したがっ
て、１つの操作軸４０の回転に追従して、雌ねじコマ３
４が１つの操作軸４０の軸線方向に進退移動する。ま
た、雌ねじコマ３４には、上下方向に突設したピンによ
ってなる一方の連繋部３５が設けられている。【００２８】主軸側旋回アーム３１のボス状の基部３１
Ａには、上下で対向する１対のアーム部３１Ｂ，３１Ｂ
が固着され、これらアーム部３１Ｂ，３１Ｂに一方の連
繋部３５を摺動自在に挿通するスリットによってなる他
方の第１連繋部３６が厚さ方向に貫通して設けられてい
る。他方の第１連繋部３６は、主軸側旋回アーム３１の
先端部側の第１部位３６Ａとこの第１部位３６Ａの後端
から折れ曲がってボス状の基部３１Ａの中心部に向かっ
て延びる第２部位３６Ｂを備えている。【００２９】副軸側旋回アーム３３には、一方の連繋部
３５を摺動自在に挿通するスリットによってなる他方の
第２連繋部３７が厚さ方向に貫通して設けられている。
他方の第２連繋部３７は、副軸側旋回アーム３３のボス
状の基部３３Ａの中心部に向かって延びる第１部位３７
Ａとこの第１部位３７Ａの先端端から折れ曲がって真直
に延びる第２部位３７Ｂを備えている。【００３０】前記構成において、主弁体２と副弁体３が
全閉している副弁内蔵形バタフライ弁の弁閉状態から主
弁体２と副弁体３とを全開する手順について説明する。【００３１】図１および図４に示す主弁体２と副弁体３
が全閉している状態では、雌ねじコマ３４の進退移動が
阻止され、雌ねじコマ３４の一方の連繋部３５が副軸側
旋回アーム３３の第２連繋部３７における第１部位３７
Ａに挿通されて副軸側旋回アーム３３の旋回および回転
伝達機構３２の回転を阻止する第１のセルフロック機能
により、軸１４および副弁体３が流体の負荷によって軸
まわりに揺動するのを防止するとともに、主軸側旋回ア
ーム３１の第１連繋部３６における第１部位３６Ａに雌
ねじコマ３４の一方の連繋部３５が挿通されて、主軸側
旋回アーム３１の旋回を阻止する第２のセルフロック機
能により上弁棒４および主弁体２が流体の負荷によって
軸まわりに揺動するのを防止している。この状態におい
て、図１の１つの操作軸４０を弁開方向Ｒ１に回転させ
ると、雌ねじコマ３４が矢印Ｘ１方向に前進する。雌ね
じコマ３４が図１の前進開始位置から図７の前進終了位
置の途中まで前進している間は、一方の連繋部３５に主
軸側旋回アーム３１の他方の第１連繋部３６は干渉しな
いので、主軸側旋回アーム３１および上弁棒４は停止し
ている。また、雌ねじコマ３４が前記前進終了位置の途
中まで前進している間は、一方の連繋部３５に副軸側旋
回アーム３３の他方の第２連繋部３７における第１部位
３７Ａが干渉して、副軸側旋回アーム３３を図７の位置
まで４５度旋回させる。この旋回は回転伝達機構３２を
介して軸１４に拡大して伝達され、軸１４を９０度旋回
させて図５のように副弁体３を弁開する。【００３２】図７および図５のように、副弁体３のみが
弁開している状態において、１つの操作軸４０の弁開方
向Ｒ１の回転を継続すると、雌ねじコマ３４が図８の前
進終了位置まで前進する。この時、一方の連繋部３５に
主軸側旋回アーム３１の他方の第１連繋部３６における
第２部位３６Ｂが干渉して、主軸側旋回アーム３１を９
０度旋回させ、同時に上弁棒４と主軸を９０度回転させ
て図６のように主弁体２を弁開する。また、雌ねじコマ
３４が前進終了位置まで前進している間は、一方の連繋
部３５に副軸側旋回アーム３３の他方の第２連繋部３７
は干渉しないので、副軸側旋回アーム３３、回転伝達機
構３２および軸１４は停止している。この状態でも、前
記第１のセルフロック機能と第２のロック機能が発揮さ
れ、副弁体３および主弁体２が流体の負荷によって軸ま
わりに揺動するのを防止する。【００３３】図６および図８のように、主弁体２と副弁
体３が弁開している状態において、１つの操作軸４０を
弁閉方向Ｒ２に回転させると、雌ねじコマ３４が矢印Ｘ
２方向に後退する。雌ねじコマ３４が前進終了位置から
図７の前進開始位置の途中まで後退している間は、一方
の連繋部３５に主軸側旋回アーム３１の他方の第１連繋
部３６における第２部位３６Ａが干渉して、主軸側旋回
アーム３１を９０度逆旋回させて図７の元の位置に復帰
させるとともに、上弁棒４は９０度逆回転して元の位置
に復帰し、図５のように主弁体２を弁閉する。また、雌
ねじコマ３４が図７の前進開始位置の途中まで後退して
いる間は、一方の連繋部３５に副軸側旋回アーム３３の
他方の第２連繋部３７は干渉しないので、副軸側旋回ア
ーム３３、回転伝達機構３２および軸１４は停止してい
る。【００３４】図７および図５のように、主弁体２のみが
弁閉している状態において、１つの操作軸４０の弁閉方
向Ｒ２の回転を継続すると、雌ねじコマ３４が図１の前
進開始位置まで後退する。この時、一方の連繋部３５に
主軸側旋回アーム３１の他方の第１連繋部３６は干渉し
ないので、主軸側旋回アーム３１および上弁棒４は停止
している。また、雌ねじコマ３４が前進開始位置まで後
退している間は、一方の連繋部３５に副軸側旋回アーム
３３の他方の第２連繋部３７における第１部位３７Ａが
干渉して、副軸側旋回アーム３３を４５度逆旋回させて
元の位置に復帰させるとともに、この逆旋回は回転伝達
機構３２を介して軸１４に拡大して伝達され、軸１４を
９０度逆旋回させて図４のように副弁体３を弁閉する。【００３５】このように、主弁体２と副弁体３の開閉操
作順序を考慮することなく、１つの操作軸４０の回転方
向を特定するだけで、自動的に開閉操作順序に基づいて
主弁体２の上弁棒４と軸１４を介して副弁体３の上弁棒
９の２軸を回転させて、特定した順序で主弁体２と副弁
体３を開閉させることができるので、従来の２つの操作
軸を有する２軸回転装置のように、主弁体２と副弁体３
の弁開と弁閉に際して、その都度、２つの操作軸を特定
した順序で弁開または弁閉方向に回転させる煩雑な操作
が不要になって、容易に操作することができるととも
に、操作順序の誤りが生じることもない。【００３６】なお、図９に示す形状に副軸側旋回アーム
３３および他方の第２連繋部３７を短縮して構成し、ス
プリング４６のばね力により実線で示す位置に副軸側旋
回アーム３３を保持して、図５および図６のように副弁
体３の弁閉状態を維持し、スプリング４５のばね力に抗
して、仮想線で示す位置に副軸側旋回アーム３３を保持
して、図４のように副弁体３の弁閉状態を維持するよう
に構成してもよい。このように構成するこで、副軸側旋
回アーム３３を小型化できる。【００３７】また、前記実施の形態では、本発明に係る
１つの操作軸による２軸回転装置を副弁内蔵形バタフラ
イ弁の開閉装置に適用しているが、本発明の適用範囲は
副弁内蔵形バタフライ弁の開閉装置のみに限定されるも
のではなく、軸まわりに回転する２つの部材を特定した
順序で正方向および逆方向に回転させる装置に適用する
ことができる。【００３８】【発明の効果】以上説明したように、本発明は、主軸と
副軸との２軸の開閉操作順序を考慮することなく、１つ
の操作軸の回転方向を特定するだけで、自動的に適正な
開閉操作順序に基づいて２軸を回転させることができる
ので、従来の２つの操作軸を有する２軸回転装置のよう
に、２軸の回転に際して、その都度、２つの操作軸を特
定した順序で正方向または逆方向に回転させる煩雑な操
作が不要になって、容易に操作することができるととも
に、操作順序に誤りを生じないので、信頼性を向上させ
ることができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-axis rotating device having a single operating shaft suitable for an opening / closing device for a butterfly valve with a built-in auxiliary valve. 2. Description of the Related Art As shown in FIGS. 10 to 12, a butterfly valve with a built-in sub-valve includes a valve box 1, a main valve body 2 which is openably and closably housed in the valve box 1, and a main valve. A sub-valve body 3 is provided in the body 2 so as to be openable and closable. An upper valve rod 4 and a lower valve rod 5 are fixed to the main valve body 2. The upper valve stem 4 is a cylindrical member provided with a through hole 6 in the direction of the axis C, and is rotatably and air-tightly supported around the axis C by the upper shaft support 7 of the valve box 1 so as to be above the upper shaft support 7. It is protruding. Lower valve stem 5 is valve box 1
The main valve body 2 is rotatably and air-tightly supported around an axis C by a lower shaft support portion 8, and the main valve body 2 is rotated by the rotation of the upper valve stem 4 and the lower valve stem 5 in the forward and reverse directions around the axis C. 1
Open and close the passage. An upper valve rod 9 and a lower valve rod 10 are fixed to the sub-valve element 3, and the upper valve rod 9 is rotatable about an axis C by an upper shaft support 12 of an auxiliary valve box 11 provided on the main valve element 2. And is airtightly supported and protrudes above the upper shaft support 12. The lower valve stem 10 is rotatably and air-tightly supported around an axis C by a lower shaft support portion 13 of the sub-valve case 11. A shaft 14 having an upper end protruding above the upper valve rod 4 is inserted through a through hole 6 provided in the upper valve rod 4 of the main valve body 2 in the direction of the axis C so as to be rotatable about the axis C. , This axis 14
And the upper end of the upper valve rod 9 of the sub-valve 3 are connected to each other via a coupling 15 so as to be able to rotate simultaneously. [0005] A biaxial rotating device 17 is mounted on the upper shaft support 7 of the valve box 1 via a stand 16. The two-axis rotating device 17 uses the two operation shafts 18 and 19 to rotate the main valve body 2.
A first gear case 20 having an axis concentric with the axis C, and a first gear case 20 having an axis concentric with the axis C. A lower end of the first gear case 20 is fixed to the stand 16, and an upper end opening of the first gear case 20 is detachably closed by a cover 22. The one operating shaft 18 is connected to the upper valve rod 4 of the main valve body 2.
To rotate in the forward and reverse directions around the axis C,
As shown in FIGS. 13 and 14, the second gear case 21
Is rotatably and airtightly supported around an axis C1 by a shaft support portion 23 provided at one end thereof, and protrudes above the shaft support portion 23. The rotation of one operation shaft 18 around the axis C1 is performed by a bevel pinion 24A, It is transmitted to a horizontal worm shaft 25 via a gear train 24 such as a bevel gear 24B, a pinion 24C, a spur gear 24D, and the like.
Is rotated via a worm 26 provided on the worm shaft 25 through a worm wheel 27 having an axis concentric with the axis C.
Is transmitted to The worm wheel 27 is fixed to a wheel boss 28 rotatably supported around the axis C by the first gear case 20 and the cover 22, and a central hole 28 </ b> A of the wheel boss 28 is provided at an upper end of the upper valve rod 4 of the main valve body 2. And are coupled so as to be simultaneously rotatable by, for example, a key (not shown). The other operation shaft 19 is for rotating the upper valve stem 9 of the sub-valve 3 in the forward and reverse directions about the axis C via the shaft 14 and the coupling 15, as shown in FIG. , Which is rotatably and air-tightly supported around an axis C by a stem cover 29 which detachably closes a center hole 22A of the cover 22 and protrudes above the stem cover 29, and is provided on the other operation shaft 19. The upper end of the shaft 14 is fitted into the blind through-hole 30 in the direction of the axis C, and is coupled to be rotatable simultaneously by, for example, a taper pin (not shown). In the above construction, the main valve body 2 and the sub-valve element 3 are fully opened from the valve-closing state of the sub-valve built-in type butterfly valve in which the main valve element 2 and the sub-valve element 3 are fully closed. The procedure for obtaining the open state of the butterfly valve will be described. First, the other operation shaft 19 is rotated in the valve opening direction (for example, counterclockwise on the projection plane). This rotation is transmitted to the upper valve rod 9 of the sub-valve 3 via the shaft 14 and the coupling 15, and simultaneously rotates the upper valve rod 9, the sub-valve 3 and the lower valve rod 10 in the valve opening direction. The sub-valve 3 can be fully opened. When the differential pressure between the upstream side and the downstream side of the valve box 1 becomes small due to the full opening of the sub-valve element 3, the one operating shaft 1
8 is the valve opening direction (for example, counterclockwise on the projection plane)
Rotate to. This rotation is transmitted to the upper valve stem 4 of the main valve body 2 through a gear train 24 such as a bevel pinion 24A, a bevel gear 24B, a pinion 24C, a spur gear 24D, a worm shaft 25, a worm 26, a worm wheel 27, and a wheel boss 28. By rotating the upper valve stem 4, the main valve stem 2 and the lower valve stem 5 simultaneously in the valve opening direction, the main valve stem 2 can be fully opened. Next, the main valve body 2 and the sub-valve element 3 are fully closed from the valve-open state of the sub-valve-incorporated type butterfly valve in which the main valve element 2 and the sub-valve element 3 are fully opened. The procedure for obtaining the closed state of the butterfly valve will be described. First, one operation shaft 18 is rotated in a valve closing direction (for example, clockwise on a projection plane). This rotation is transmitted to the upper valve stem 4 of the main valve body 2 through a gear train 24 such as a bevel pinion 24A, a bevel gear 24B, a pinion 24C, a spur gear 24D, a worm shaft 25, a worm 26, a worm wheel 27, and a wheel boss 28. ,
The upper valve stem 4, the main valve body 2 and the lower valve stem 5 can be simultaneously rotated in the valve closing direction to fully close the main valve body 2. After the main valve body 2 is fully closed, the passage of fluid from the upstream side to the downstream side of the valve box 1 is greatly restricted, and then the other operation shaft 19 is moved in the valve closing direction (for example, clockwise on the projection plane). Around). This rotation is transmitted to the upper valve rod 9 of the sub-valve 3 via the shaft 14 and the coupling 15, and simultaneously rotates the upper valve rod 9, the sub-valve 3 and the lower valve rod 10 in the valve closing direction, The sub-valve 3 can be fully closed. As described above, in the butterfly valve with a built-in sub-valve, the operation order of the main valve body 2 and the sub-valve body 3 from the valve closed state to the valve open state is as follows. Opening of the sub-valve body 3 by rotating the other operation shaft 19,. The operation of the main valve 2 and the sub-valve 3 from the valve open state to the valve closed state is performed by opening the valve of the main valve body 2 by rotating one of the operation shafts 18. The valve closing of the main valve body 2 by the rotation operation of one operation shaft 18,. This is performed by closing the valve of the sub-valve body 3 by rotating the other operation shaft 19. [0015] Therefore, in the conventional two-shaft rotary device having two operating shafts, each time the main valve and the sub-valve are opened and closed, two operating shafts are required. The shaft must be rotated in the specified direction to open or close the valve, which has the disadvantage of cumbersome operation, and improper operation increases the operating force when opening and closing the valve significantly. Therefore, there is a problem that smooth opening and closing of the valve are hindered. Accordingly, the present invention provides a method of automatically rotating two axes based on an appropriate operation order simply by specifying the rotation direction of one operation axis without considering the operation order. It is an object of the present invention to provide a two-axis rotating device using one operation shaft, which can facilitate the operation and can avoid an erroneous operation sequence. In order to achieve the above object, a two-axis rotating device with one operating shaft according to the present invention is provided.
A main shaft and a sub-shaft inserted into the main shaft along the main shaft are rotated in a specified order in the normal and reverse directions around the main shaft by rotation of one operation shaft. A shaft rotating device, comprising: a main shaft side revolving arm provided so as to be able to rotate simultaneously with the main shaft; a rotation transmission mechanism for transmitting rotation to the sub shaft; and rotation input to an input side rotation member of the rotation transmission mechanism. An operating shaft having a countershaft-side pivot arm, an axis crossing the axes of the main shaft and the countershaft, rotatably supported, and having an external thread provided on an outer periphery thereof; and an outer periphery of the one operating shaft. A female screw member having a female screw portion to be screwed into the male screw of the female screw member that moves in the axial direction of the one operation shaft following the first rotation direction and the second rotation direction of one operation shaft; And one connecting portion provided, The shaft-side pivot arm does not interfere with the one connecting portion while the female screw piece moves forward from the advance start position to halfway of the advance end position following the rotation of the one operation shaft in the first rotational direction. While the female screw top advances from the middle of the advance to the advance end position, it interferes with the one connecting portion to rotate the main shaft side swing arm and rotates the one operation shaft in the second rotation direction. While the female screw top retreats from the advancing end position to the middle of the advancing start position following the above, it interferes with the one connecting portion to reversely rotate the main spindle side revolving arm, and the female screw top is moved from the middle of the retreating. While retreating to the forward movement start position, the other first linking portion that does not interfere with the one linking portion is provided, and the countershaft-side turning arm follows the rotation of the one operation shaft in the first rotation direction. And the female While the top advances from the forward start position to the middle of the forward end position, it interferes with the one connecting portion and rotates the sub-shaft side turning arm, so that the female screw top advances from the middle of the advance to the forward end position. During this operation, the countershaft-side turning arm is stopped without interfering with the one connecting portion, and the female screw piece is moved from the forward end position to the forward start position following the rotation of the one operation shaft in the second rotational direction. While retracting halfway, the counter shaft side turning arm is stopped without interfering with the one connecting portion, and while the female screw piece is retracted from the middle of the retreat to the advance start position, the one connecting portion is connected to the one connecting portion. The other second linking portion that causes the counter shaft-side turning arm to turn in the reverse direction by interference is provided. According to the present invention, the female screw top advances by rotating one operation shaft in the first rotation direction. While the female screw piece is moving forward from the forward start position to the middle of the forward end position, the other first connecting portion of the spindle-side turning arm does not interfere with one connecting portion, so that the spindle-side turning arm and the main shaft stop. ing. In addition, while the female screw top is moving forward from the forward start position to the middle of the forward end position, the other second connecting portion of the counter shaft side turning arm interferes with one connecting portion, and the counter shaft side turning arm is moved. The sub-shaft is turned through the rotation transmission mechanism. By continuing rotation of one operation shaft in the first rotation direction, the female screw top advances from the middle of the advance to the advance end position. At this time, the other first connecting portion of the spindle-side turning arm interferes with one of the connecting portions, thereby turning the spindle-side turning arm and simultaneously turning the main shaft. In addition, while the female screw top is moving forward from the middle of the advance to the advance end position, the other second connecting portion of the counter shaft side turning arm does not interfere with one connecting portion, so that the counter shaft side turning arm, the rotation transmission mechanism And the counter shaft is stopped. In the above state, one operation shaft is
By rotating in the rotation direction, the female screw top retreats.
While the female screw top is retracted from the forward end position to the middle of the forward start position, the other first connecting portion of the spindle-side turning arm interferes with one connecting portion, and causes the main shaft-side turning arm to turn backward. When the spindle is returned to the original position, the main shaft rotates in the reverse direction and returns to the original position. Further, while the female screw top is retracted from the forward end position to the middle of the forward start position, the other second connecting portion of the counter shaft side turning arm does not interfere with one connecting portion, so that the counter shaft side turning arm, The rotation transmission mechanism and the countershaft are stopped. Further, by continuing to rotate the one operation shaft in the second rotation direction, the female screw top retreats from the middle of the retreat to the advance start position. At this time, since the other first connecting portion of the main shaft side turning arm does not interfere with one connecting portion, the main shaft side turning arm and the main shaft are stopped. In addition, while the female screw top is retreating from the middle of retreat to the advance start position, the other second connecting portion of the countershaft-side turning arm interferes with one connecting portion, and causes the countershaft-side turning arm to turn in the reverse direction. To return to the original position, and the counter shaft is reversely rotated via the rotation transmission mechanism to return to the original position. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings, in a form applied to an opening / closing device for a butterfly valve with a built-in sub-valve in the same manner as in the prior art. Therefore, the structure of the valve box 1, the main valve body 2, the sub-valve body 3, the upper valve rods 4, 9, the lower valve rods 5, 10, the shaft 14 and the like are the same as those of the conventional example. The same or corresponding parts as those in the conventional example of FIGS. 10 to 14 are denoted by the same reference numerals. FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a partial sectional view taken along line AA of FIG. 1, and FIG. 3 is a partial sectional view taken along line BB of FIG. is there. In these figures, the two-axis rotating device 17 includes a main-axis-side turning arm 31,
A rotation transmitting mechanism 32, a countershaft-side swivel arm 33, and an axis intersecting the axes of the upper valve rod 4 and the shaft 14 are rotatably supported by the casing 41, and are provided with external threads 40A on the outer periphery. One operating shaft 40 is provided. The boss-shaped base 31 of the main shaft side swing arm 31
A is fitted to the upper end of the upper valve rod 4 of the main valve body 2 and is connected to each other by a key 39 so as to be simultaneously rotatable. The rotation transmitting mechanism 32 has an output-side small sector gear 32A fitted with the upper end of the shaft 14 and rotatably coupled by a key 42, and an output-side small sector gear 32A.
And an input-side large sector gear 32C meshed with the intermediate gear 32B. The input-side large sector gear 32C is connected to a rotary shaft 43 rotatably mounted on the casing 41 by a key 44. ing. The boss-shaped base 33 of the counter-shaft-side swivel arm 33
A is fitted with a rotating shaft 43 and connected to each other by a key 44 so as to be simultaneously rotatable. A female screw top 34 having a female screw portion 34A screwed to a male screw 40A on the outer periphery of one operation shaft 40 is provided, and both ends thereof slide guides 45, 45 provided in parallel with one operation shaft 40. It penetrates freely. Therefore, following the rotation of one operating shaft 40, the female screw top 3
4 moves in the axial direction of one operation shaft 40. In addition, the female screw top 34 is provided with one connecting portion 35 formed by pins protruding vertically. The boss-shaped base 31 of the spindle-side swivel arm 31
A has a pair of upper and lower arms 31B, 31B facing each other.
The other first connecting portion 36 formed of a slit for slidably inserting one connecting portion 35 into the arm portions 31B, 31B is provided so as to penetrate in the thickness direction. The other first linking portion 36 is a first portion 36A on the tip end side of the main spindle side turning arm 31 and a second portion bent from the rear end of the first portion 36A and extending toward the center of the boss-shaped base 31A. 36B. The other pivoting arm 33 is provided with a second connecting portion 37 formed by a slit through which one connecting portion 35 is slidably inserted so as to penetrate in the thickness direction.
The other second linking portion 37 is a first portion 37 extending toward the center of the boss-shaped base 33 </ b> A of the counter-shaft-side turning arm 33.
A and a second portion 37B that is bent from the tip end of the first portion 37A and extends straight. A procedure for fully opening the main valve body 2 and the sub-valve element 3 from the closed state of the butterfly valve with a built-in sub-valve in which the main valve element 2 and the sub-valve element 3 are fully closed will be described. . The main valve body 2 and the auxiliary valve body 3 shown in FIGS.
Is fully closed, the forward / backward movement of the female screw top 34 is prevented, and one connecting portion 35 of the female screw top 34 is connected to the first portion 37 of the second connecting portion 37 of the counter shaft side turning arm 33.
The shaft 14 and the sub-valve 3 are swung around the shaft by the load of the fluid by the first self-locking function which is inserted into the shaft A to prevent the rotation of the sub shaft side turning arm 33 and the rotation of the rotation transmission mechanism 32. And the second connecting portion 35 of the female screw top 34 is inserted into the first portion 36A of the first connecting portion 36 of the main shaft side turning arm 31 to prevent the main shaft side turning arm 31 from turning. The lock function prevents the upper valve stem 4 and the main valve body 2 from swinging around the axis due to the load of the fluid. In this state, when one operation shaft 40 in FIG. 1 is rotated in the valve opening direction R1, the female screw top 34 advances in the direction of arrow X1. While the female screw top 34 is moving forward from the forward start position in FIG. 1 to the middle of the forward end position in FIG. 7, the other first connecting portion 36 of the main shaft side turning arm 31 does not interfere with one connecting portion 35. The main shaft-side swivel arm 31 and the upper valve stem 4 are stopped. In addition, while the female screw top 34 is advancing halfway to the advancing end position, the first portion 37A of the other second connecting portion 37 of the countershaft-side turning arm 33 interferes with one connecting portion 35, The counter shaft-side turning arm 33 is turned 45 degrees to the position shown in FIG. The turning is enlarged and transmitted to the shaft 14 via the rotation transmitting mechanism 32, and the shaft 14 is turned 90 degrees to open the sub-valve 3 as shown in FIG. As shown in FIGS. 7 and 5, when the rotation of one operating shaft 40 in the valve opening direction R1 is continued in a state where only the sub-valve 3 is opened, the female screw top 34 moves forward in FIG. Move forward to end position. At this time, the second portion 36 </ b> B of the other first connecting portion 36 of the main shaft side turning arm 31 interferes with one connecting portion 35, and the main shaft side turning arm 31
The main valve body 2 is turned by 0 degrees, and at the same time, the upper valve rod 4 and the main shaft are rotated by 90 degrees to open the main valve body 2 as shown in FIG. Also, while the female screw top 34 is moving forward to the forward end position, one connecting portion 35 is connected to the other second connecting portion 37 of the counter shaft side turning arm 33.
Do not interfere with each other, the counter-shaft-side turning arm 33, the rotation transmission mechanism 32, and the shaft 14 are stopped. Even in this state, the first self-locking function and the second locking function are exhibited, and the auxiliary valve body 3 and the main valve body 2 are prevented from swinging around the axis due to the load of the fluid. As shown in FIGS. 6 and 8, when one operating shaft 40 is rotated in the valve closing direction R2 in a state where the main valve body 2 and the sub-valve body 3 are open, the female screw top 34 is turned into an arrow. X
Retreat in two directions. While the female screw top 34 is retracted from the forward end position to halfway of the forward start position in FIG. 7, the second portion 36 </ b> A of the other first connecting portion 36 of the main shaft side turning arm 31 interferes with one connecting portion 35. Then, the main shaft side turning arm 31 is turned 90 degrees in reverse to return to the original position in FIG. 7, and the upper valve rod 4 is rotated 90 degrees in reverse to return to the original position, and as shown in FIG. The valve body 2 is closed. Also, while the female screw top 34 is retracted halfway to the advance start position in FIG. 7, the other second linking portion 37 of the counter shaft side turning arm 33 does not interfere with one linking portion 35, The turning arm 33, the rotation transmission mechanism 32, and the shaft 14 are stopped. As shown in FIGS. 7 and 5, when the rotation of one operating shaft 40 in the valve closing direction R2 is continued while only the main valve body 2 is closed, the female screw top 34 moves forward in FIG. Move backward to the starting position. At this time, since the other first connecting portion 36 of the main shaft side turning arm 31 does not interfere with one connecting portion 35, the main shaft side turning arm 31 and the upper valve stem 4 are stopped. Also, while the female screw top 34 is retracted to the forward start position, the first portion 37A of the other second connecting portion 37 of the counter shaft side turning arm 33 interferes with one connecting portion 35, and the The turning arm 33 is turned 45 degrees in reverse to return to the original position, and this reverse turning is enlarged and transmitted to the shaft 14 via the rotation transmission mechanism 32, and the shaft 14 is turned 90 degrees in the reverse direction to rotate the shaft 14 in FIG. Valve valve 3 is closed as described above. As described above, the rotation direction of one operating shaft 40 is specified simply without considering the opening / closing operation sequence of the main valve body 2 and the sub-valve body 3, and the main valve body 2 and the sub-valve body 3 are automatically determined based on the opening / closing operation sequence. By rotating the two axes of the upper valve stem 9 of the sub-valve element 3 via the upper valve stem 4 and the shaft 14 of the valve element 2, the main valve element 2 and the sub-valve element 3 can be opened and closed in a specified order. Therefore, the main valve body 2 and the sub-valve body 3 are arranged like a conventional two-axis rotating device having two operation shafts.
Each time the valve is opened and closed, the complicated operation of rotating the two operation axes in the specified direction in the valve opening or valve closing direction is not required, and the operation can be easily performed. No errors occur. The countershaft-side swing arm 33 and the other second connecting portion 37 are shortened to the shape shown in FIG. 9, and the countershaft-side swing arm 33 is moved to the position shown by the solid line by the spring force of the spring 46. 5 and 6, the sub-valve 3 is maintained in the closed state, and the counter-shaft-side swing arm 33 is held at a position indicated by a virtual line against the spring force of the spring 45. As shown in FIG. 4, the sub-valve body 3 may be configured to maintain the valve closed state. With this configuration, the counter-shaft-side turning arm 33 can be downsized. Further, in the above-described embodiment, the two-axis rotating device with one operation shaft according to the present invention is applied to the opening / closing device of the butterfly valve with a built-in sub-valve. The present invention is not limited to only the opening and closing device for the butterfly valve, but can be applied to a device for rotating two members rotating around an axis in a specified order in a forward direction and a reverse direction. As described above, according to the present invention, an automatic opening and closing operation of only one operation axis is specified only by specifying the rotation direction of one operation axis without considering the opening / closing operation order of the main axis and the auxiliary axis. Since the two axes can be rotated based on a proper opening / closing operation sequence, the two operating axes are rotated each time the two axes are rotated as in a conventional two-axis rotating device having two operating axes. This eliminates the need for a complicated operation of rotating in the specified direction in the forward or reverse direction, allows easy operation, and improves the reliability because no error occurs in the operation order.

【図面の簡単な説明】【図１】本発明の一実施の形態を示す縦断側面図であ
る。【図２】図１のＡ−Ａ線に沿う部分断面図である。【図３】図１のＢ−Ｂ線に沿う断面図である。【図４】主弁体および副弁体の弁閉状態を示す説明図で
ある。【図５】副弁体のみの弁開状態を示す説明図である。【図６】主弁体の弁開状態を示す説明図である。【図７】副軸側旋回アームの旋回状態を示す説明図であ
る。【図８】主軸側旋回アームの旋回状態を示す説明図であ
る。【図９】副軸側旋回アームの変形例を示す図７相当図で
ある。【図１０】副弁内蔵形バタフライ弁に適用した従来例の
正面図である。【図１１】図１０の平面図である。【図１２】図１０の側面図である。【図１３】図１１のＤ−Ｄ線に沿う拡大断面図である。【図１４】図１１のＥ−Ｅ線に沿う拡大断面図である。【符号の説明】４上弁棒（主軸）１４軸（副軸）１７２軸回転装置３１主軸側旋回ア−ム３２回転伝達機構３３副軸側旋回ア−ム３４雌ねじコマ３５ピン（一方の連繋部）３６他方の第１連繋部３７他方の第２連繋部４０操作軸４０Ａウオーム（駆動歯車）Ｒ１弁開方向（第１回転方向）Ｒ２弁閉方向（第２回転方向）BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional side view showing an embodiment of the present invention. FIG. 2 is a partial sectional view taken along line AA of FIG. FIG. 3 is a sectional view taken along line BB of FIG. 1; FIG. 4 is an explanatory diagram showing a closed state of a main valve body and a sub-valve body. FIG. 5 is an explanatory diagram showing a valve open state of only a sub-valve element. FIG. 6 is an explanatory diagram showing a valve open state of a main valve body. FIG. 7 is an explanatory diagram showing a turning state of a countershaft-side turning arm. FIG. 8 is an explanatory view showing a turning state of a main-axis-side turning arm. FIG. 9 is a view corresponding to FIG. 7 showing a modification of the countershaft-side swivel arm. FIG. 10 is a front view of a conventional example applied to a butterfly valve with a built-in sub-valve. FIG. 11 is a plan view of FIG. 10; FIG. 12 is a side view of FIG. 10; FIG. 13 is an enlarged sectional view taken along the line DD in FIG. 11; FIG. 14 is an enlarged sectional view taken along line EE of FIG. 11; [Description of Signs] 4 Upper valve stem (main shaft) 14 shaft (sub shaft) 17 2-axis rotating device 31 main shaft side turning arm 32 rotation transmission mechanism 33 sub shaft side turning arm 34 female screw top 35 pin (one of (Linking portion) 36 The other first linking portion 37 The other second linking portion 40 Operating shaft 40A Worm (drive gear) R1 Valve opening direction (first rotation direction) R2 Valve closing direction (second rotation direction)

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.⁷，ＤＢ名) F16K 31/44 - 31/60 F16K 1/16 - 1/226 ──────────────────────────────────────────────────続き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16K 31/44-31/60 F16K 1/16-1/226

Claims

(57) Claims 1. A main shaft and a sub shaft inserted through the main shaft along the axis of the main shaft are rotated around one axis of the main shaft by rotation of one operation shaft. A two-axis rotating device that rotates in the order specified in each of the forward and reverse directions, a main spindle side turning arm provided so as to be able to rotate simultaneously with the main shaft, and a rotation transmission mechanism that transmits rotation to the sub shaft. A countershaft-side swivel arm for inputting rotation to an input-side rotating member of the rotation transmission mechanism; and a rotatable arm having an axis intersecting the axes of the main shaft and the subshaft, and having an external thread provided on the outer periphery. A single operating shaft, and a female screw portion screwed into a male screw on the outer periphery of the one operating shaft, the first operating direction of the one operating shaft following the first rotating direction and the second rotating direction of the one operating shaft. A female screw top that moves back and forth in the axial direction, and this female screw The main shaft side revolving arm, the female screw piece moves from the forward start position to the middle of the forward end position following the rotation of the one operation shaft in the first rotational direction. While the female screw top does not interfere with the one connecting portion during the forward movement, and interferes with the one connecting portion while the female screw piece advances from the middle of the forward movement to the forward end position, the main shaft side turning arm is turned. While the female screw piece follows the rotation of the one operation shaft in the second rotation direction and retreats from the forward end position to halfway of the forward start position, the female screw piece interferes with the one connecting portion and causes the main shaft side turning arm to move. When the female screw top is retracted from the middle of the retreat to the advance start position while the female screw top is retracted, the other first connecting portion that does not interfere with the one connecting portion is provided. One operating axis While the female screw piece moves forward from the forward start position to the middle of the forward end position following the rotation in the first rotational direction, the female screw piece interferes with the one connecting portion to rotate the sub-shaft side turning arm, and While the top advances from the middle of the advance to the advance end position, the counter shaft-side turning arm is stopped without interfering with the one connecting portion, and follows the rotation of the one operation shaft in the second rotation direction. Then, while the female screw top is retracted from the forward end position to halfway of the forward start position, the sub shaft side turning arm is stopped without interfering with the one connecting portion, and the female screw top is moved forward during the backward movement. While retreating to the start position, there is provided another second connecting portion which interferes with the one connecting portion and reversely rotates the sub-shaft-side turning arm in a reverse direction. apparatus.