JP3771757B2 - Transfer device - Google Patents

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Publication number
JP3771757B2
JP3771757B2 JP27610999A JP27610999A JP3771757B2 JP 3771757 B2 JP3771757 B2 JP 3771757B2 JP 27610999 A JP27610999 A JP 27610999A JP 27610999 A JP27610999 A JP 27610999A JP 3771757 B2 JP3771757 B2 JP 3771757B2
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Prior art keywords
pair
transfer
perspective
vertical
workpiece
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JP27610999A
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Japanese (ja)
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JP2001096327A (en
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和彦 小澤
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Asahi Seiki Manufacturing Co Ltd
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Asahi Seiki Manufacturing Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、前後移動可能な1対のトランスファバーに開閉可能な複数対のフインガを各対ごとに対向して装着可能なトランスファスライド機構と、このトランスファスライド機構を前後往復移動させる前後駆動機構とをトランスファプレスに設けて、その上流工程のワークを下流工程に順次移送するトランスファ装置に関するものである。
【0002】
【従来の技術】
従来の技術としては、前後移動可能な1対のトランスファバーに,ばねなどで開閉可能な複数対のフィンガを装着したトランスファ装置(以下、従来技術Aという)、前後移動かつ遠近移動可能な1対のトランスファバーに、ばねなどで開閉可能な複数対のフィンガを装着したトランスファ装置(以下、従来技術Bという)、または、これらのトランスファ装置において、ワークの底面とダイの上面との間に空間を形成して把持するようにしたトランスファ装置(以下、従来技術Cという)が知られている。
【0003】
従来技術Aのトランスファ装置では、複数対のフィンガに把持されたワークを1対のトランスファバーの進退移動のみで下流工程に移送するものである。従来技術Bのトランスファ装置では、複数対のフィンガが、ワークを把持する時期に1対のトランスファバーを把持位置に接近移動させ、ワークを解放する時期に非把持位置に離隔移動させて、高速加工におけるフィンガの把持または解放を助け、そしてワークを把持した1対のトランスファバーを前進させることで、下流工程に移送するものである。また、従来技術Cのトランスファ装置では、ワークの底面とダイの上面との間に空間を形成するように把持することで、ワークの底面がダイの上面に摺接しないようにして移送するものである。
【0004】
【発明が解決しようとする課題】
しかしながら、従来技術Aのトランスファ装置においては、把持されたワークを下流工程に移送する際に、そのワークの底面がダイの上面に摺接して、その底面に擦疵が生じやすいという問題や、高速加工に対応できないという問題があった。従来技術Bのトランスファ装置においては、高速加工には対応しやすいが、ワークを移送する際に底面がダイの上面に摺接して、その底面に擦疵が生じやすいという問題があった。
【0005】
また、従来技術Cのトランスファ装置においては、ワークの底面がダイの上面に摺接することは回避できるが、それでも、ダイの上面との間に空間を形成する把持位置にワークを押し上げるノックアウトの上面と、そのワークの底面とが摺接することは回避できないという問題があった。請求項ごとの解決すべき課題は次の通りである。
【0009】
請求項の発明においては、ワークを移送する際に、トランスファスライド機構をそのフィンガとともに上昇させ、設定の把持時期または解放時期に1対のトランスファバーを遠近移動させて、ワーク底面の擦疵発生を回避し、1対のトランスファバーの遠近移動のタイミングを適正化しトランスファバーを遠近移動させ、簡素な構造とすることで高速加工が可能なトランスファ装置を構成することが課題である。
【0011】
請求項の発明においては、トランスファスライド機構が前進移動する間では上昇させ、次の前進開始までの間に下降させるように、かつ、設定の把持時期または解放時期に1対のトランスファバーを離隔移動させるように、正確なタイミングで上下遠近移動機構を駆動することが課題である。
【0012】
請求項の発明においては、トランスファスライド機構を高速度で上下移動させることは困難であり、この問題点を解決できる上下遠近移動機構を構成することが課題である。
【0013】
本発明は、上述のような問題点に鑑みてなされたものであり、その目的とするところは、把持されたワークを下流工程に移送する際に、そのワークの底面が、ダイの上面またはノックアウトの上面に摺接して、その底面に擦疵が生じやすいという問題や、高速加工ができないという問題などを解決することである。 そして、構造を簡素にして、安価なトランスファプレスのトランスファ装置を提供しようとするものである。
【0022】
【課題を解決するための手段】
上記目的を達成するために本請求項の発明は、前後移動可能な1対のトランスファバーに開閉可能な複数対のフインガを各対ごとに対向して装着可能なトランスファスライド機構と、このトランスファスライド機構を前後往復移動させる前後駆動機構とをトランスファプレスに設けて、その上流工程のワークを下流工程に順次移送する装置であって、前記トランスファスライド機構の1対のトランスファバーは、直列されたダイの上側位置でワークの移送中心軸線を挟んで平行かつ遠近移動可能に設けて前記前後駆動機構と上下移動自在に連結し、このトランスファスライド機構を上下移動させるとともに前記1対のトランスファバーを前記フィンガがワークを把持可能な把持実行位置と把持不可能な非把持実行位置とにワークの移送中心軸線を挟んで遠近移動させる上下遠近移動機構と、前記トランスファスライド機構を少なくとも後退端位置から前進端位置に前進移動する間では上昇させ次の前進開始までの間に下降させるように、かつ、前記1対のトランスファバーを少なくとも後退端位置で前記フィンガによってワークの把持を開始する把持開始時期までに把持実行位置に接近移動させ把持されたワークを前進端位置で前記フィンガから解放を開始する解放開始時期に非把持位置に離隔移動させるように前記上下遠近移動機構を駆動する上下遠近駆動機構とを備えて、前記トランスファスライド機構が後退端位置から前進端位置に前進移動する間は、このトランスファスライド機構をそのフィンガとともに上昇させることで、そのフィンガに把持されたワークの底面とダイの上面との間に空間を形成してワークを下流工程に移送するとともに、少なくとも後退端位置で把持開始時期までに把持実行位置と、前進端位置で解放開始時期に非把持位置とに前記1対のトランスファバーを関連的に遠近移動するようにしたトランスファ装置において、前記上下遠近移動機構は、前記1対のトランスファバーの各々を前後遠近移動自在であるように各々の下側位置に設けた少なくとも1対の前後遠近案内台ユニットと、この1対の前後遠近案内台ユニットをその上面で前後・遠近方向に移動自在なリニア軸受部材で構成し前記1対のトランスファバーを上下移動可能であるように下台の上側位置で上下移動可能な1対の昇降台と、この1対の昇降台を上下移動可能に各々案内する1対の上下案内部材と、前記1対の前後遠近案内台ユニットの遠近移動する対向端部に各々設けた1対の遠近カムフオロアと、上昇移動することで前記1対の昇降台を上昇させるようにこの1対の昇降台に各々掛止されて上下移動可能な昇降ロッドと、この昇降ロッドの上端部に設けられ下降移動することで前記1対の遠近カムフオロアを介して前記1対の昇降台を下台に当接するまで各々下降させ下台に当接した後もさらに下降移動することで前記1対の遠近カムフオロアを介して前記前後遠近案内台ユニットを押し拡げて各々離隔移動させる楔状カムと、この楔状カムに前記1対の遠近カムフオロアが各々当接するように前記1対の前後遠近案内台ユニットを付勢可能に前記1対の昇降台に各々設けられた1対の付勢部材とを含んでなり、前記昇降ロッドを前記上下遠近駆動機構により上昇移動させることで、前記1対の昇降台と前記1対の前後遠近案内台ユニットとを介して前記一対のトランスファバを上昇移動させるとともに前記付勢部材で接近移動させ、前記昇降ロッドを下降移動させることで、前記1対の遠近カムフオロアと前記1対の前後遠近案内台ユニットとを介して前記1対のトランスファバーを下降移動、かつ、離隔移動するようにしたものである。
【0023】
請求項の発明によれば、トランスファスライド機構が後退端位置から前進端位置に前進移動する間は、このトランスファスライド機構をそのフィンガとともに上昇させることで、そのフィンガに把持されたワークの底面とダイの上面との間に空間を形成してワークを下流工程に移送するとともに、少なくとも後退端位置で把持開始時期までに把持実行位置と、前進端位置で解放開始時期に非把持位置とに1対のトランスファバーを関連的に遠近移動することができ、ワークの移送に際して、ワーク底面の擦疵発生を防ぎ、スプレッダの併用をなくして1対のトランスファバーの遠近移動のタイミングが適正化できるので高速加工が可能となる効果に加えて、 上下遠近移動機構は、上述した1対の前後遠近案内台ユニットと、1対の昇降台と、1対の上下案内部材と、1対の遠近カムフオロアと、昇降ロッドと、楔状カムと、1対の付勢部材とを設けるようにしたので、昇降ロッドを上昇移動させることで、1対の昇降台と1対の前後遠近案内台ユニットとを介してトランスファスライド機構を簡素な構造で上昇移動させるとともに、昇降ロッドを下降移動させることで、1対の遠近カムフオロアと1対の前後遠近案内台ユニットとを介して1対のトランスファバーを簡素な構造で下降移動かつ遠近移動することができる。
【0024】
請求項の発明は、前記上下遠近駆動機構は、揺動可能に一端部がボルスタ部に枢支され端部が前記上下遠近移動機構の前記昇降ロッドの下端部と関節状に係着された揺動レバーと、この揺動レバーに回転可能に設けられた上下カムフオロアと、この上下カムフオロアと当接して前記揺動レバーを揺動可能なカム曲面が形成されて前記前後駆動機構と関連的に回転可能な上下駆動カムとを含んでなり、この上下駆動カムが前記前後駆動機構と関連的に回転することで、前記トランスファスライド機構を少なくとも後退端位置から前進端位置に前進移動する間では上昇させ、次の前進開始までの間に下降させるように、かつ、前記1対のトランスファバーを少なくとも後退端位置で前記フィンガによってワークの把持を開始する把持開始時期までに把持実行位置に接近移動させ、把持されたワークを前進端位置で前記フィンガから解放を開始する解放開始時期に非把持位置に離隔移動させるように前記上下遠近移動機構を駆動するようにしたものである。
【0025】
請求項の発明によれば、上下遠近駆動機構は、上述した揺動レバーと、上下カムフオロアと、上下駆動カムとを備えるようにしたので、この上下駆動カムが前後駆動機構と関連的に回転することで、トランスファスライド機構を少なくとも後退端位置から前進端位置に前進移動する間では上昇させ、次の前進開始までの間に下降させるように、かつ、1対のトランスファバーを少なくとも後退端位置でフィンガによってワークの把持を開始する把持開始時期までに把持実行位置に接近移動させ、把持されたワークを前進端位置でフィンガから解放を開始する解放開始時期に非把持位置に離隔移動させるように上下遠近移動機構を駆動することができる。従って、1対のトランスファバーをその前後移動に同期させて、上下移動および遠近移動させることができる。
【0026】
請求項の発明は、前記上下遠近移動機構には、一端は前記下台に掛止させ他端は前記1対の昇降台に各々掛止させて前記1対の昇降台を各々下方に常時付勢する1対の下降付勢ばねを設けて、この1対の下降付勢ばねによって前記1対の昇降台を常時下方に付勢することで、前記昇降ロッドを下降移動させて前記1対の遠近カムフオロアを介して前記1対のトランスファバーを下降移動させる際に、前記楔状カムによる前記1対のトランスファバーの下降移動に加勢するようにしたものである。
【0027】
請求項の発明によれば、上下遠近移動機構には、上述した1対の下降付勢ばねを設けるようにしたので、この1対の下降付勢ばねによって1対の昇降台を常時下方に付勢することで、昇降ロッドを下降移動させて1対の遠近カムフオロアを介して1対のトランスファバーを下降移動させる際に、楔状カムによる1対のトランスファバーの下降移動を加勢することができる。従って、1対のトランスファバーは、下降途中で楔状カムによって離隔されることなく、下降端に達してから楔状カムの作用で離隔され、加工速度の向上が図れる。また、下降付勢ばねのみで1対のトランスファバーを下降させ、楔状カムは、離隔移動させる作用のみにすることもできる。
【0028】
【発明の実施の形態】
本発明の実施の形態について、図面にもとづき説明する。
【0029】
図1は、トランスファ装置の全体を示す上面図、図2は、図1の前後移動軸線上のA−A矢視縦断面図、図3は、前後駆動機構、上下遠近移動機構、トランスファスライド機構を示す図1左側部の拡大上面図、図4は、図3の前後移動軸線上のB−B矢視縦断面図、図5は、上下遠近移動機構、上下遠近駆動機構を示す図1のC−C矢視縦断面図、図6は、上下遠近移動機構を示す図5上部の拡大縦断面図、図7は、図6に示す上下遠近移動機構の他の実施例を示す拡大縦断面図、図8は、プレススライドの上下移動と、1対のトランスファバーの前後移動、上下移動、遠近移動との関係を示す作動タイミング図である。
【0030】
図1,図2において、本例のトランスファ装置は、前後移動可能な1対のトランスファバー1A,1Bが、フレーム23A,23Bに橋設固定されたボルスタ4上の下台8の上側位置で平行、かつ、前後移動軸線方向に設けられ、この1対のトランスファバー1A,1Bに開閉可能な複数対のフィンガ2A,2Bが装着されたトランスファスライド機構110と、このトランスファスライド機構110を昇降台3A,3Bで案内され上下方向に移動させる上下遠近移動機構120,120と、この1対のトランスファバー1A,1Bが上下動する前後においてもトランスファスライド機構110の前後移動が可能に設けられた継手部材と図示しないプレススライドを駆動するプレス駆動カムを支承するプレス駆動カム軸と同期する前後駆動カム軸6の前後駆動カム7と往復移動体12とで構成する前後駆動機構130と、1対のトランスファバー1A,1Bを上下遠近移動させるために上下遠近移動機構120,120を駆動する上下遠近駆動機構140,140とで構成されている。
【0031】
図3は、図1の左側部の拡大図であって、1対のトランスファバー1A,1Bの上下遠近移動時にもこのトランスファバー1A,1Bの前後移動を可能にする往復移動体12と、トランスファバー1A,1Bとを連接する継手部材である頭付ボルト15,連結台16,ピン17A,17B,ホルダ18,ロッド19,掛止腕20,連結腕21A,21B,ロッド軸受22A,22Bを有する前後駆動機構130およびこの前後駆動機構130と上下遠近移動機構120,120を支える昇降台3A,3Bとの位置関係を示している。図4は、図3の拡大した縦断面図であり、前記継手部材、下台8に設けられているダイ9、ノックアウト10、昇降台3A,3B及びフィンガ2A,2Bが装備されたトランスファバー1A,1Bの位置関係を示している。
【0032】
次にトランスファスライド機構110、上下遠近移動機構120,120、前後駆動機構130、上下遠近駆動機構140,140の構成を図3,図4において説明する。トランスファスライド機構110は、1対のトランスファバー1A,1Bに開閉可能な複数対のフィンガ2A,2Bが装着され,トランスファバー1A,1Bの前端側と後端側とで下台8上の2か所に設けた昇降台3A,3Bで下面が支持されている。
【0033】
このトランスファバー1A,1Bは、昇降台3A,3Bとの間に、前後遠近案内台ユニットである遠近案内体50A,50B,敷台51A,51B,前後摺動子52A,52B,遠近摺動子53A,53B,前後案内体54A,54B,中敷台55A,55Bを挟むように設けたことにより、前後遠近方向に摺動可能に案内されている。
【0034】
図示しないプレス駆動カム軸と同期回転するように連結され、ボルスタ4に固定した軸受ブラケット5に前後駆動カム軸6が軸承されている。この前後駆動カム軸6に止着された前後駆動カム7の回転により、トランスファバー1A,1Bは、後述する継手部材を介して、前進端位置と後退端位置との間を往復移動する。
【0035】
上下遠近移動機構120,120は昇降台3A,3Bの中央部分に穿設された穴の周縁部下端面とボルスタ4に装着された下台8を貫通させて設けた縦穴に上下動可能に支承された昇降ロッド25A,25Bの段部係合面25aが係合しており、この昇降ロッド25A,25Bを上昇移動させたとき、昇降台3A,3Bも上昇移動するように係合している。また、この昇降ロッド25A,25Bの上下動に続く昇降ロッド25A,25Bの下降・上昇に対して楔状カムが作用してトランスファバー1A,1Bの遠近移動が操作される。
【0036】
前後駆動機構130は、前後駆動カム軸6の回転運動で往復移動体12を前後移動させる直線運動に変換する部分と、これをトランスファスライド機構110のトランスファバー1A,1Bに伝達する継手部材とで構成されている。
【0037】
本例の前後駆動機構130は、図3において、ボルスタ4に固定した軸受ブラケット5に、前後駆動カム軸6と直交する平面上でこの軸を中にして両軸端部を固定された平行な2本の前後案内軸11A,11Bに支承された往復移動体12は、この往復移動体12上に取着された前後カムフオロア13A,13Bに外接する前後駆動カム7の回転に従い前後方向の往復運転にされる。前後カムフオロア13Aは軸固定、前後カムフオロア13Bは軸芯位置を棒先ねじ14で調整し固定する。往復移動体12の後退端にはストッパ24が設けられている。
【0038】
次に往復移動体12の往復運動をトランスファバー1A,1Bに伝える前記継手部材の構成は、図4において、往復移動体12側には前進端側の中央上面に刻設された溝12aに係合する頭部を有する頭付ボルト15を固定した連結台16が固着されている。往復移動されるトランスファバー1A,1Bは、前後方向のほか遠近方向や、上下方向にも作動タイミングに従って移動する。遠近方向と上下方向の自在な移動に対し連結台16とトランスファバー1A,1Bとの間に滑り対偶が直交する継手部材を設けている。
【0039】
一つの滑り対偶は連結台16に穿孔された2個の平行穴と上下方向に滑動する2本のピン17A,17Bを植設固定したホルダ18とで形成し、他の滑り対偶は2本のピン17A,17Bの軸芯を通る平面と1対のトランスファバー1A,1Bの上面平行する方向に軸線を有するロッド19をホルダ18の前進側端面18aに当接させ、かぎ形突起部を持つ掛止腕20で挟持固定されたロッド19と1対のトランスファバー1A,1Bのそれぞれの後端側に固着した連結腕21A,21Bに孔設されたロッド軸受22A,22Bとがロッド19の両軸端でトランスファバー1A,1Bの遠近移動時に滑動するように形成されている。また、トランスファバー1A,1Bは、この前後駆動機構130に対して、ピン17A,17Bによって上下移動が自在である。
【0040】
図5は、1対のトランスファバー1A,1Bが設けられたトランスファスライド機構110,110と、その1対のトランスファバー1A,1Bを上下遠近移動させる上下遠近移動機構120,120と、この上下遠近移動機構120,120の上下移動機構部と遠近移動機構部とを関連的に駆動する上下遠近駆動機構140,140とを示す。
【0041】
本例の上下遠近駆動機構140,140は、図5において、2組の昇降台3A,3Bは下台8の上面に前記トランスファバー1A,1Bの前側と後側にそれぞれ設けられている。昇降台3A,3Bの上下案内部材は下台8の正確な位置決めと円滑な上下動可能に昇降台3A,3Bの各々の下面から垂直に突出させてこの昇降台3A,3Bに固定した2本ずつの上下案内軸34A,34Bを下台8に穿設した案内軸受35A,35Bを上下案内軸34A,34Bに対応して設けている。
【0042】
図示しないプレス駆動カム軸と連動して回転する上下駆動カム軸31に軸着された1対の上下駆動カム32A,32Bにより、昇降ロッド25A,25Bを上下動させる。上昇の後半に昇降台3A,3Bと係合して上昇させ、下降時の前半で昇降台3A,3Bを下台8の上面まで降下するようにカム曲線は設計されている。後半は昇降ロッド25A,25Bの先端の楔状カム33A,33Bでトランスファバー1A,1Bを遠近移動させる。
【0043】
次に上下遠近移動機構120,120について、昇降台3A,3Bを上下移動させる昇降ロッド25A,25Bとの前記係合を説明する。
【0044】
図において、昇降台3A,3Bは、下台8の上面に当接する位置から昇降ロッド25A,25Bの上部に形成された段状係合面25aと昇降台3A,3Bの穴周縁部下端面とが当接して隙間Sとなる位置を保持するよう形成された上下駆動カム32A,32Bのカム曲線に従い上昇する。
【0045】
上下移動される昇降ロッド25A,25Bは、下台8の案内穴8aで上部が案内され、案内板36A,36Bで下部が案内される。この案内板36A,36Bの上面と、昇降ロッド25A,25Bの段部との間には、上昇付勢ばね37A,37Bを外挿し、昇降ロッド25A,25Bを上方向に付勢している。続く遠近移動のためのリフト量が上下駆動カム32A,32Bのカム溝32aが続いて形成されている。
【0046】
このリフト量で案内される上下カムフオロア38A,38Bの動きは、ボルスタ4に固定したブラケット39A,39Bの先端部の揺動枢軸40A,40Bで軸承された揺動レバー41A,41Bの揺動角に変換される。最終的には昇降ロッド25A,25Bの下端に設けた連結駒42A,42Bと関節状に係合する点において上下方向の変位に拡大され昇降ロッド25A,25Bを上下方向に移動させる。
【0047】
昇降ロッド25A,25Bが降下して、この昇降ロッド25A,25Bの先端に固定された楔状カム33A,33Bが作用する。この楔状カム33A,33Bは、下端部が、昇降ロッド25A,25Bの外径と略同一の半径で、上方に向かうに従い、その半径が大きく傾斜する楔状カム面33a,33aを両側面に形成している。この楔状カム面33a,33aに前記上下案内部材に設けた遠近カムフオロア43A,43Bが接触し、生じた下方向分力を受けて下台8の上面まで昇降台3A,3Bは降下する。後述するように上下案内軸34A,34Bの下方向に下降付勢ばね60A,60Bで付勢して積極的に降下するようにすることもできる〔図7参照〕。
【0048】
図6は、1対のトランスファバー1A,1Bを上下遠近移動させる上下遠近移動機構120,120、その楔状カム33A,33Bと前後遠近案内台ユニットの係合関係、昇降ロッド25A,25Bと昇降台3A,3Bおよび上下案内部材との関係等を示している。図6において、1対のトランスファバー1A,1Bは、直列されたダイ9の上側位置で、ワークの移送中心軸線を挟んで平行かつ遠近移動可能に配設し、このトランスファバー1A,1Bと昇降台3A,3Bとの間には、トランスファバー1A,1Bを前後(図6紙面の表裏)方向と遠近(図6紙面の左右)方向とに移動案内する前後遠近案内台ユニットが設けられている。
【0049】
この上下遠近移動機構120,120の中央部には、上下移動可能に昇降ロッド25A,25Bが設けられ、その上端部には、楔状カム33A,33Bが取着されている。この楔状カム33A,33Bを上下方向に移動位置決めすることで、トランスファバー1A,1Bは上下および遠近移動する。
【0050】
図中、本例の上下遠近移動機構120,120は、1対のトランスファバー1A,1Bの下側位置に1対の前後遠近案内台ユニットを設け、上下案内部材の面側から支持する1対の昇降台3A,3Bと、この昇降台3A,3Bを押し上げる昇降ロッド25A,25Bの段状係合面25aを軸の上部に有し、上部軸端に取着した楔状カム33A,33Bの降下時に昇降台3A,3Bを下台8の上面まで降下させる。続いて前記前後遠近案内台ユニットの中敷台55A,55Bに取着した遠近カムフオロア43A,43Bに作用して1対のトランスファバー1A,1Bを離隔させる1対の昇降ロッド25A,25Bから構成されている。
【0051】
前記前後遠近案内台ユニットは、トランスファバー1A,1Bの前進・後退・送りと接近・離隔・移動の遠近送りが直交し且つ円滑な移動ができるように昇降台3A,3B上に前後・遠近方向に移動自在なリニア軸受部材を直交して構成されている。
【0052】
前記リニア軸受部材は、昇降台3A,3Bの各々上面にリニア軸受で支承された遠近案内体50A,50Bを対向して設け、トランスファバー1A,1Bの敷台51A,51Bのそれぞれの下面をリニア軸受で支承された前後摺動子52A,52Bで支え、前記遠近案内体50A,50Bの遠近摺動子53A,53Bと前記前後摺動子52A,52Bの前後案内体54A,54Bとの間にこれらの両案内を取着する中敷台55A,55Bが設けられている。中敷台55A,55Bのそれぞれの接近側端部には楔状カム33A,33Bと係合する遠近カムフオロア43A,43Bを軸承する突起片56A,56Bが対向して取着されている。
【0053】
また中敷台55A,55Bのそれぞれの外側端面からこの中敷台55A,55Bを接近する方向に押圧する押圧子57A,57Bとこれを付勢部材である空圧アクチュエータ58A,58Bが昇降台3A,3Bの外側端面に固定したブラケット59A,59Bに設けられている。それぞれの遠近カムフオロア43A,43Bは、昇降ロッド25A,25Bの上部軸端の楔状カム33A,33Bの楔状カム面33a,33aを対向するように押圧して当接している。昇降ロッド25A,25Bの上昇端にあるときは遠近カムフオロア43A,43Bは最も接近した位置に楔状カム33A,33Bの楔状カム面33a,33aにより位置決めされる。
【0054】
昇降ロッド25A,25Bが下降する初めの段階で、楔状カム33A,33Bの楔状カム面33a,33aが遠近カムフオロア43A,43Bに作用して、中敷台55A,55Bを下方に移動させて昇降台3A,3Bを下台8の上面に当接させ、昇降ロッド25A,25Bが下降することで、トランスファバー1A,1Bが離隔するように中敷台55A,55Bを移動させる。
【0055】
上下遠近駆動機構140,140は前述したように、昇降ロッド25A,25Bの上下動を駆動する上下駆動カム32A,32B、そのカム溝32aに嵌装する上下カムフオロア38A,38B、その変位量を昇降ロッド25A,25Bに伝える揺動レバー41A,41B等の構成を既に説明しているので説明を省略する。なお、上下駆動カム32A,32Bの各々のカム溝32aは、昇降台3A,3Bの上下移動とトランスファバー1A,1Bの遠近移動とを連続的に作動させるために、そのカム曲面は、上下移動作用部と遠近移動作用部とが1回転角度内で連続するように各々形成されている。
【0056】
昇降台3A,3Bを昇降ロッド25A,25Bが係合する軸の段部係合面25aで持ち上げて、昇降台3A,3Bと下台8との間に隙間Sが形成される。この状態でフィンガ2A,2Bがワークを把持して前進する。その後昇降ロッド25A,25Bが降下したとき、昇降台3A,3Bも楔状カム33A,33Bの下降に追従して降下するのは前述したとおりである。
【0057】
昇降ロッド25A,25Bが降下する際に、昇降台3A,3Bと昇降ロッド25A,25Bとの係合面が離反しないで昇降台3A,3Bが下台8の上面に着座するように下降付勢ばね60A,60Bで下方向に付勢した他の上下案内部材の例を図7に示している。図において案内軸受35A,35Bでそれぞれ支承される上下案内軸34A,34Bを下方向に付勢する下降付勢ばね60A,60Bを上下案内軸34A,34Bの下端に取着したボルト61A,61Bの頭部の段付面と下台8の穿設穴の底面との間で支持して昇降台3A,3Bの下降を積極的に行うものである。
【0058】
前述のように構成した本例の主な構成部の作用を次に説明する。本例の前後駆動機構130の継手部材の作用は、図3,図4において、前後移動軸線方向に移動する往復移動体12と前後・上下・遠近の三方向に移動するトランスファバー1A,1Bとを継手部材が連接している。上下方向は往復移動体12に固定の連結台16とホルダ18に固着した1対のピン17A,17Bとが摺動し、遠近方向は1対のトランスファバー1A,1Bのそれぞれの後端に固定した連結腕21A,21Bの穴に嵌装したロッド軸受22A,22Bの穴と、中央部分がホルダ18と掛止腕20とで挟持されたロッド19の両軸端が摺動可能に支承されピン17A,17Bとロッド19の二つの摺動軸芯の直交する方向に移動自在である。従ってトランスファバー1A,1Bの上下方向・遠近方向の移動は自在であることを示している。
【0059】
次にトランスファスライド機構110の上下遠近移動機構120,120の作用は、図5,図6において、昇降ロッド25A,25Bの上下移動と、空圧アクチュエータ58A,58Bによる付勢とで行われる。図示しないプレススライドを駆動するプレス駆動カムのプレス駆動カム軸と同期回転する1対の上下駆動カム32A,32Bに刻設されたカム溝32aに嵌装された上下カムフオロア38A,38Bの動きは揺動レバー41A,41Bの先端の自在連結子44A,44Bの動きに拡大される。
【0060】
この動き量は、昇降ロッド25A,25Bの下部軸端に螺着し位置決めされた連結駒42A,42Bを上下させ昇降ロッド25A,25Bの上下動き量となる。1対の昇降ロッド25A,25Bはそれぞれの上昇付勢ばね37A,37Bで上方向に付勢されている。トランスファスライド機構110と昇降台3A,3Bの重量が大きいので昇降ロッド25A,25Bの軸の段状係合面25aが昇降台3A,3Bの嵌装穴で掛け止めされている。従って1対の昇降ロッド25A,25Bが、上下駆動カム32A,32Bで上向きに駆動されたとき昇降台3A,3Bを段状係合面25aで隙間量Sだけ上昇させる。
【0061】
対向するフィンガ2A,2Bがワークを把持したまま前進送りするトランスファスライド機構110の後退端位置から前進端位置への移動の間はワーク下面とダイ9若しくはノックアウト10の上面との干渉による擦疵の発生を回避するために隙間Sを保持する。1対の昇降台3A,3Bの上下動を支える上下案内部材の作用は後退端側の昇降台3Aと前進端側の昇降台3Bのそれぞれの下側に設けられ、昇降台3A,3Bのそれぞれの下面に突出した2本の上下案内軸34A,34Bが下台8上に平行に穿孔した孔に嵌装した案内軸受35A,35Bに支承案内されて1対の昇降ロッド25A,25Bにより上下方向に滑らかに摺動させることである。
【0062】
次に上下遠近駆動機構140,140の作用は、図5,図6において、トランスファスライド機構110が上下遠近駆動機構140,140の駆動により上下移動し、続いてその1対のトランスファバー1A,1Bにそれぞれ対向して設けたフィンガ2A,2Bを把持実行位置と非把持位置とに遠近移動する二つの継続した動作を昇降ロッド25A,25Bに付与するため上下駆動カム32A,32Bのカム溝32aに所定のカム曲線を刻設する。トランスファスライド機構110が上昇した位置を保っている間に前進送りをし前進送り完了後にプレススライドが下降し下死点位置に達する前の近傍時期を選んでフィンガ2A,2Bをワーク把持位置から非把持位置へ離隔させるよう昇降ロッド25A,25Bを更に下降させるようにカム溝32aを刻設する。
【0063】
前述のようにトランスファスライド機構110の上下動とフィンガ2A,2Bの接近・離隔を1対の上下駆動カム32A,32Bで昇降ロッド25A,25Bを二段階に上下動させることにより実行する。この場合、昇降台3A,3B上に設けたトランスファバー1A,1Bは前後送りとこれに直交する遠近送りが自在な前後遠近案内台ユニットの機能で担保されている。
【0064】
前記前後遠近案内台ユニットにおいて、昇降台3A,3B上でトランスファバー1A,1Bを支える敷台51A,51Bの中間に、摺動可能なスライド軸受が直交するそれぞれの摺動面に嵌挿して設けられているので、円滑な昇降台3A,3Bの上下遠近駆動が可能となる。また、トランスファスライド機構110が前進送りされる前後にトランスファバー1A,1Bが上下送りされ、後退送りされる前後にトランスファバー1A,1Bが遠近送りされので、前後駆動カム7によるトランスファスライド機構110の前後送りを伝える継手部材には、トランスファバー1A,1Bの上下送りと遠近送り時に摺動して連結する自在継手が用いられておりトランスファバー1A,1Bの円滑な動きを担保している。
【0065】
昇降ロッド25A,25Bが上下駆動カム32A,32Bにより下降を始めると、この昇降ロッド25A,25Bの上端に取着した楔状カム33A,33Bが1対の遠近カムフオロア43A,43Bを押し拡げる。この遠近カムフオロア43A,43Bを固定した中敷台55A,55Bの外側から楔状カム33A,33Bの方向にそれぞれ押圧する空圧アクチュエータ58A,58Bを設けて楔状カム33A,33Bのカム形状に忠実に追従する。
【0066】
この楔状カム33A,33Bが降下してフィンガ2A,2Bがワークの把持位置から非把持位置に離隔される。昇降台3A,3Bの下降は楔状カム33A,33Bの下降により遠近カムフオロア43A,43Bを押すがこの際の下降力は垂直方向の分力として生ずる。図7に示すように昇降台3A,3Bの下面に突出する上下案内軸34A,34Bに下方向に積極的に下降付勢ばね60A,60Bで付勢するときは昇降ロッド25A,25Bの高速な上下動にも追従可能である。
【0067】
作動タイミング図を図8にもとづき説明する。図において、図示しないプレススライドを駆動するプレス駆動カムを基準としたトランスファバー1A,1Bの前後送り(前後駆動カム7)、上下送りと遠近送り(上下駆動カム32A,32B)のタイミングである。横軸はプレス駆動カムの回転角度を示し、0度はプレススライドが下死点位置から上昇を開始する角度位置、180度はプレススライドが上死点位置から下降を開始する角度位置である。
【0068】
本例ではトランスファスライド機構110が後退端位置から前進端位置に前進移動する間はフィンガ2A,2Bとともに若干寸法上昇させフィンガ2A,2Bに把持されるワークの底面とダイ9の上面との間に空間を形成してワークの底面はダイ9の上面またはノックアウト10の上面に摺接しないように上昇のタイミングを選定する点が重要なポイントである。
【0069】
トランスファスライド機構110の上下動は上下遠近駆動機構140,140で駆動され上昇してから前記トランスファスライド機構110が前進端へ移動をした後、前進端位置で原位置への降下を完了する。1対のフィンガ2A,2Bの遠近移動は単独でなく上下遠近移動機構120,120の駆動で行われる。フィンガ2A,2Bがワークから離れてワークの非把持位置に至る前にトランスファバー1A,1Bは前進端位置から後退端位置への後退を始め後退端に達する前にフィンガ2A,2Bがワークの把持位置に接近してワークを把持する。このようにしてトランスファスライド機構110の前進端位置から後退端位置復帰を完了させている。トランスファバー1A,1Bの上下・遠近の動作を前後駆動カム7と上下駆動カム32A,32Bとをプレス駆動カムのプレス駆動カム軸に連動させて作動タイミングを確実にしている。
【0070】
(1)0度≦プレス駆動カムの回転角度<90度
回転するプレス駆動カムが0度の角度位置は、プレススライドが下死点位置に達してから20度回転したプレス加工の完了位置であって、プレススライドとともにパンチが下死点位置から上昇を開始し、90度の角度位置で上昇中間位置に達する。このとき、ワークは、図示しないパンチとノックアウト10とで上昇される。この間、トランスファスライド機構110は、その遠近移動位置がトランスファバー1A,1Bの最も離隔した非把持位置、上下移動位置が下降端位置を各々維持した状態で、その前後移動位置は、後退途中位置からプレス駆動カムが35度の角度位置で後退端位置に達する。
【0071】
そして、トランスファバー1A,1Bは、プレス駆動カムが30度の角度位置で、昇降ロッド25A,25Bが上下駆動カム32A,32Bにより上昇を開始し、空圧アクチュエータ58A,58Bによって付勢されることで接近を開始する。その接近途中でフィンガ2A,2Bがワークに当接して、70度の角度位置で最も接近する把持実行位置に達し、ワークの把持は完了する。なお、この時点での昇降ロッド25A,25Bの上昇移動位置は、その段状係合面25aが、昇降台3A,3Bの穴周縁部下端面に当接する直前の位置であって、ワークを把持したトランスファバー1A,1Bは下降端位置を維持している。
【0072】
(2)90度≦プレス駆動カムの回転角度<180度
プレススライドは、上昇中間位置から、プレス駆動カムが160度の角度位置で上死点位置に達し、180度の角度位置で下降を開始する。この間、トランスファバー1A,1Bは、フィンガ2A,2Bでワークを継続的に把持している。その上下移動位置は、プレス駆動カムが100度の角度位置で、上昇を開始して120度の角度位置で上昇端位置に達する。
【0073】
すなわち、昇降ロッド25A,25Bが、上下駆動カム32A,32Bによってその段状係合面25aと、昇降台3A,3Bの穴周縁部下端面とが当接する上昇移動位置に達する。さらに昇降ロッド25A,25Bが上昇することで、昇降台3A,3Bとともにトランスファバー1A,1Bを上昇端位置まで上昇させる。
【0074】
このとき、ノックアウト10はフィンガ2A,2Bがワークを把持した上昇端位置に待機しているので、ワークの底面は、ダイ9の上面からはもとより、ノックアウト10の上面からも離隔された状態で継続的に把持されている。また、その前後移動位置は、プレス駆動カムが125度の角度位置で、前後駆動カム7によりワークを移送するための前進移動を開始し、180度の角度位置で前進中間位置に達する。
【0075】
(3)180度≦プレス駆動カムの回転角度<270度
プレススライドは、プレス駆動カムが180度の角度位置で下降を開始し、270度の角度位置で下降中間位置に達する。この間、トランスファバー1A,1Bは、ワークを継続的に把持した状態で、前進中間位置から、プレス駆動カムが215度の角度位置で前進端位置に達する。この前進端位置に達することでワークは1加工工程下流に設けられたダイ9の上面位置に移送される。
【0076】
その上下移動位置は、この直後のプレス駆動カムが220度の角度位置で、昇降ロッド25A,25Bが、上下駆動カム32A,32Bによって下降されて、楔状カム33A,33Bの楔状カム面33a,33aによって、昇降台3A,3Bとともにトランスファバー1A,1Bが下降を開始する。この昇降ロッド25A,25Bは継続的に下降され、240度の角度位置で、昇降台3A,3Bの下端面が下台8の上端面に当接する下降端位置に達する。
【0077】
その後、昇降ロッド25A,25Bの下降移動は一時停止され、プレス駆動カムが270度の角度位置で再び下降を開始する。そして、トランスファバー1A,1Bが下降端位置に達し、昇降ロッド25A,25Bの下降移動が一時停止している間に、把持されたワークにパンチが係合する。継続的に下降するパンチは、プレス駆動カムが略270度の角度位置で、その下端部がワークの底内面に達し、待機しているノックアウト10とでワークの底部を挟持する。このワークは、フィンガ2A,2Bによってまだ継続的に把持されている。
【0078】
(4)270度≦プレス駆動カムの回転角度<360度
プレススライドは、下降中間位置からさらに下降し、パンチによってワークをダイ9内に加圧して絞り、しごき加工などをし、プレス駆動カムが340度の角度位置で下死点位置に達し、360度=0度の角度位置で、パンチの加圧による加工は完了する。この間、トランスファバー1A,1Bは、前進端位置で下降端位置をまだ維持しており、プレス駆動カムが270度の角度位置で、一時停止していた昇降ロッド25A,25Bが、上下駆動カム32A,32Bの作動で再び下降を開始する。そして、トランスファバー1A,1Bは、楔状カム33A,33Bの楔状カム面33a,33aによって遠近カムフオロア43A,43Bが押し拡げられて、把持実行位置から離隔するように移動を開始し、310度の角度位置で最も離隔した非把持位置に達する。このようにトランスファバー1A,1Bが離隔しても、離隔開始当初はフィンガ2A,2Bの開閉付勢ばね26A,26Bでワークを付勢しているので、ワークはまだ把持されている。そして、トランスファバー1A,1Bが最も離隔した非把持位置に達するまでの間に、ワークはフィンガ2A,2Bから解放される。また、トランスファバー1A,1Bの前後移動位置は、遠近移動位置が最も離隔した非把持位置に達する直前のプレス駆動カムが305度の角度位置で、後退を開始し、360度の角度位置で後退途中位置に達する。これで、プレスの1加工サイクルは終了し、繰り返し継続的にプレス駆動カムが回転することで、連続的にプレス加工できる。
【0085】
【発明の効果】
本発明は、上述したとおり構成するようにしたので、以下に記載する効果を奏する。
【0090】
請求項の発明によれば、ワークの移送に際して、そのワークの底面は、ダイの上面またはノックアウトの上面に摺接せず、その底面に擦疵を付けないという効果を維持しつつ、また、1対のトランスファバーを把持実行位置と非把持位置とに遠近移動することにより、スプレッダの併用が不要になって高速加工が容易にできる効果も維持しつつ、上下遠近移動機構は、昇降ロッドを上下遠近駆動機構により上昇移動させることで、1対の昇降台と1対の前後遠近案内台ユニットとを介してトランスファスライド機構を上昇移動させるとともに、昇降ロッドを下降移動させることで、1対の遠近カムフオロアと1対の前後遠近案内台ユニットとを介して1対のトランスファバーを下降移動かつ離隔移動するようにしたので、高速加工に対応するトランスファ装置を構造が簡素で安価にできる効果を奏する。
【0091】
請求項の発明によれば、上下遠近駆動機構は、上下駆動カムが前後駆動機構と関連的に回転することで、トランスファスライド機構を少なくとも後退端位置から前進端位置に前進移動する間では上昇させ、次の前進開始までの間に下降させるように、かつ、1対のトランスファバーを少なくとも後退端位置でフィンガによってワークの把持を開始する把持開始時期までに把持実行位置に接近移動させ、把持されたワークを前進端位置でフィンガから解放を開始する解放開始時期に非把持位置に離隔移動させるように上下遠近移動機構を駆動するようにしたので、トランスファスライド機構の上下遠近移動を高速加工の際のプレス加工のタイミングと容易に合わせることができる。
【0092】
請求項の発明によれば、上下遠近移動機構には、1対の下降付勢ばねを設けるようにしたので、楔状カムによる1対のトランスファバーの下降移動を加勢するようにしたので、1対のトランスファバーは、下降途中で楔状カムによって離隔されることなく、下降端に達してから楔状カムの作用で離隔され、加工速度の向上が図れる。
【図面の簡単な説明】
本発明のトランスファ装置に係る実施の形態を以下のとおり図1乃至図8に示す。
【図1】トランスファ装置の全体を示す説明図であって、その上面図である。
【図2】トランスファ装置の上部全体を示す説明図であって、図1の前後移動軸線上のA−A矢視縦断面図である。
【図3】前後駆動機構、上下遠近移動機構、トランスファスライド機構を示す説明図であって、図1左側部の拡大上面図である。
【図4】前後駆動機構、上下遠近移動機構、トランスファスライド機構を示す説明図であって、図3の前後移動軸線上のB−B矢視縦断面図である。
【図5】上下遠近移動機構、上下遠近駆動機構を示す説明図であって、図1の前後移動軸線と直交する上下遠近移動機構中心線上のC−C矢視縦断面図である。
【図6】上下遠近移動機構を示す説明図であって、図5上部の拡大縦断面図である。
【図7】図6に示す上下遠近移動機構の他の実施例を示す説明図であって、その拡大縦断面図である。
【図8】プレススライドの上下移動と、1対のトランスファバーの前後移動、上下移動、遠近移動との関係を示す説明図であって、プレス駆動カムの回転角度を基準とした作動タイミング図である。
【符号の説明】
1A,1B トランスファバー
2A,2B フィンガ
3A,3B 昇降台
6 前後駆動カム軸
7 前後駆動カム
8 下台
9 ダイ
10 ノックアウト
12 往復移動体
25A,25B 昇降ロッド
26A,26B 開閉付勢ばね
32A,32B 上下駆動カム
32a カム溝
33A,33B 楔状カム
33a 楔状カム面
34A,34B 上下案内軸
35A,35B 案内軸受
38A,38B 上下カムフオロア
41A,41B 揺動レバー
43A,43B 遠近カムフオロア
44A,44B 自在連結子
50A,50B 遠近案内体
51A,51B 敷台
52A,52B 前後摺動子
53A,53B 遠近摺動子
54A,54B 前後案内体
55A,55B 中敷台
58A,58B 空圧アクチュエータ
60A,60B 下降付勢ばね
110 トランスファスライド機構
120 上下遠近移動機構
130 前後駆動機構
140 上下遠近駆動機構
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transfer slide mechanism capable of mounting a plurality of pairs of fingers that can be opened and closed to a pair of transfer bars that can move back and forth, and a front and rear drive mechanism that reciprocates the transfer slide mechanism back and forth. Is provided in a transfer press, and relates to a transfer device for sequentially transferring a workpiece in an upstream process to a downstream process.
[0002]
[Prior art]
As a conventional technique, a transfer device (hereinafter referred to as “prior art A”) in which a pair of transfer bars that can be moved back and forth is mounted with a plurality of pairs of fingers that can be opened and closed by a spring or the like, A transfer device in which a plurality of pairs of fingers that can be opened and closed by a spring or the like are mounted on the transfer bar (hereinafter referred to as Conventional Technology B), or in these transfer devices, a space is formed between the bottom surface of the workpiece and the top surface of the die. 2. Description of the Related Art A transfer device formed and gripped (hereinafter referred to as Conventional Technology C) is known.
[0003]
In the transfer device of the prior art A, the workpieces held by a plurality of pairs of fingers are transferred to a downstream process only by advancing and retracting a pair of transfer bars. In the transfer device of prior art B, a plurality of pairs of fingers move a pair of transfer bars closer to the gripping position when gripping the workpiece, and move apart to the non-grip position when releasing the workpiece, thereby performing high-speed machining. Gripping or releasing fingers Help Then, the pair of transfer bars holding the workpiece are moved forward to be transferred to the downstream process. Further, in the transfer device of the prior art C, the workpiece is held so as to form a space between the bottom surface of the workpiece and the upper surface of the die, so that the bottom surface of the workpiece is transferred so as not to be in sliding contact with the upper surface of the die. is there.
[0004]
[Problems to be solved by the invention]
However, in the transfer device of the prior art A, when the gripped work is transferred to the downstream process, the bottom surface of the work is in sliding contact with the top surface of the die, and the bottom surface is easily rubbed. There was a problem that it could not cope with processing. In the transfer device of the prior art B, although it is easy to cope with high-speed machining, there is a problem that when the workpiece is transferred, the bottom surface is in sliding contact with the top surface of the die, and the bottom surface is easily rubbed.
[0005]
In addition, in the transfer device of the prior art C, it is possible to avoid the bottom surface of the workpiece from being in sliding contact with the top surface of the die, but the workpiece is still pushed to a gripping position that forms a space between the top surface of the die. increase There has been a problem that it is unavoidable that the top surface of the knockout and the bottom surface of the workpiece are in sliding contact with each other. Problems to be solved for each claim are as follows.
[0009]
Claim 1 In the invention of The When transferring the workpiece, the transfer slide mechanism is lifted along with its fingers. Let Move the pair of transfer bars in the distance at the set gripping or releasing time to avoid scratching the bottom surface of the workpiece, and optimize the timing of the pair of transfer bars in the distance Move the transfer bar up and down, and with a simple structure Thus, it is a problem to construct a transfer device capable of high-speed machining.
[0011]
Claim 2 In this invention, the transfer slide mechanism is raised during the forward movement and lowered until the next forward movement starts, and the pair of transfer bars are moved apart at the set gripping timing or release timing. In addition, it is a problem to drive the up-and-down perspective moving mechanism with accurate timing.
[0012]
Claim 3 In this invention, it is difficult to move the transfer slide mechanism up and down at high speed, and it is an object to construct a vertical and vertical movement mechanism that can solve this problem.
[0013]
The present invention has been made in view of the above-described problems. The object of the present invention is to transfer the gripped workpiece to the downstream process so that the bottom surface of the workpiece is the top surface of the die or knockout. This is to solve the problem that the bottom surface is easily rubbed and the bottom surface thereof is easily rubbed, and the problem that high-speed machining cannot be performed. Then, the structure is simplified and an inexpensive transfer press transfer device is provided.
[0022]
[Means for Solving the Problems]
To achieve the above objective This claim 1 The invention includes a transfer slide mechanism capable of mounting a plurality of pairs of fingers that can be opened and closed on a pair of transfer bars that can move back and forth, and a front and rear drive mechanism that reciprocally moves the transfer slide mechanism back and forth. Is provided in the transfer press and sequentially transfers the workpiece in the upstream process to the downstream process, and the pair of transfer bars of the transfer slide mechanism sets the transfer center axis of the workpiece at the upper position of the serially connected dies. A gripping execution position at which the pair of transfer bars can grip a workpiece while the transfer slide mechanism is moved up and down, and is provided so as to be movable in parallel with the front and rear drive mechanism. Up / down / perspective to move the workpiece to the non-grip execution position where gripping is not possible And at least the pair of transfer bars at least at the retracted end so as to be raised while moving forward from at least the retracted end position to the advanced end position, and to be lowered before starting the next advancement. The gripping work is moved close to the gripping execution position by the start of gripping of the work by the finger at the position, and the gripped work is moved away from the finger at the forward end position to the non-grip position at the start of release by the finger. And a vertical / distance drive mechanism for driving the vertical / horizontal movement mechanism, and while the transfer slide mechanism moves forward from the retracted end position to the advanced end position, the transfer slide mechanism is lifted together with the fingers. A space is formed between the bottom surface of the workpiece held by the finger and the top surface of the die. And the pair of transfer bars are moved relative to each other between a gripping execution position at least at the retracted end position by the gripping start timing and a non-gripping position at the release end timing at the forward end position. West T Lance device In The vertical movement mechanism includes at least one pair of front / rear perspective guides provided at lower positions of the pair of transfer bars so as to be movable in the front / rear direction. unit And this pair of front and rear perspective guide The unit is composed of linear bearing members that can move in the front / rear and perspective directions on the top surface. A pair of elevators that can move up and down at a position above the lower base so that the pair of transfer bars can be moved up and down, and a pair of vertical guide members that respectively guide the pair of elevator bars so as to be movable up and down. And the pair of front and rear perspective guides unit And a pair of perspective cam followers provided at opposite end portions that move in the near and far directions, respectively, and can be moved up and down by being hooked on the pair of lifts so as to lift the pair of lifts. The lift rod and the lift rod are provided at the upper end of the lift rod and moved downward so that the pair of lift stands are lowered until they come into contact with the lower base via the pair of perspective cam followers, and further after contacting the lower base. By moving downward, the front / rear perspective guide stand via the pair of perspective cam followers unit And a pair of front and rear perspective guides so that the pair of perspective cam followers abut each other. unit And a pair of urging members respectively provided on the pair of elevating bases so that the elevating rod is moved up and down by the up-and-down / perspective drive mechanism. And the pair of front / rear guides unit And through the above Pair of transfer bars As you move up The urging member is moved closer and the lifting rod is moved By moving downward, the pair of perspective cam followers and the pair of front and rear perspective guides unit And moving down the pair of transfer bars via Separation It is intended to move.
[0023]
Claim 1 According to the invention, while the transfer slide mechanism moves forward from the retracted end position to the advanced end position, the transfer slide mechanism is lifted together with the finger so that the bottom surface of the work gripped by the finger and the top surface of the die A space is formed between the workpiece and a downstream process, and at least a pair of transfer between a gripping execution position at the retracted end position by the gripping start timing and a non-gripping position at the release end timing at the leading end position. You can move the bar relative Wa When transferring the workpiece, it is possible to prevent the occurrence of rubbing on the bottom surface of the workpiece and to optimize the timing of the pair of transfer bars to move far and near without the use of a spreader, thereby enabling high-speed machining. In addition to the effect The vertical and vertical movement mechanism is a pair of the front and rear perspective guides described above. unit And a pair of lifting platforms, a pair of vertical guide members, a pair of perspective cam followers, a lifting rod, a wedge-shaped cam, and a pair of biasing members. By moving, a pair of elevators and a pair of front / rear perspective guides unit The transfer slide mechanism is moved up and down with a simple structure, and the lifting rod is moved down to move the pair of perspective cam followers and the pair of front and rear perspective guides. unit Thus, the pair of transfer bars can be moved downward and close with a simple structure.
[0024]
Claim 2 According to the present invention, the up / down perspective drive mechanism can swing. One end is the bolster Pivoted other The end of the up / down movement mechanism Said A swing lever that is articulated with the lower end of the lift rod, a vertical cam follower rotatably provided on the swing lever, and a cam that can swing the swing lever in contact with the vertical cam follower A vertical drive cam having a curved surface and rotatable in relation to the front / rear drive mechanism. The vertical drive cam rotates in relation to the front / rear drive mechanism, so that the transfer slide mechanism is at least moved backward. The pair of transfer bars is lifted during the forward movement from the end position to the forward end position and lowered until the next forward start, and the gripping of the workpiece is started by the finger at least at the backward end position. The gripping work is moved closer to the gripping execution position by the gripping start time to be released, and the gripped work is not gripped at the release start time to start releasing from the finger at the forward end position. It is obtained so as to drive the upper and lower perspective moving mechanism so as to be spaced apart moved to location.
[0025]
Claim 2 According to the invention, the vertical / perspective drive mechanism is provided with the above-described swing lever, the vertical cam follower, and the vertical drive cam, so that the vertical drive cam rotates in association with the front / rear drive mechanism. The transfer slide mechanism is raised at least during the forward movement from the backward end position to the forward end position, and is lowered until the next forward start, and the pair of transfer bars are at least at the backward end position by the fingers. Move up and down and close to move to the gripping execution position by the gripping start time to start gripping the workpiece, and move the gripped workpiece to the non-grip position at the start of release to start releasing from the finger at the forward end position. The mechanism can be driven. Accordingly, the pair of transfer bars can be moved up and down and moved in the near and far direction in synchronization with the back and forth movement thereof.
[0026]
Claim 3 According to the present invention, one end of the up-and-down perspective moving mechanism is Said A pair of descending biasing springs are provided, the other ends of which are respectively latched on the pair of lifting platforms and the pair of lifting platforms are constantly biased downward. By urging the pair of lifting platforms downward by a biasing spring at all times, when the lifting rod is moved downward and the pair of transfer bars are moved downward via the pair of perspective cam followers, The pair of transfer bars are urged downward by the wedge cam.
[0027]
Claim 3 According to the present invention, since the above-mentioned pair of lowering biasing springs are provided in the up-and-down / far-moving mechanism, the pair of lowering and biasing springs always bias the pair of elevators downward. Thus, when the lifting rod is moved downward and the pair of transfer bars are moved downward via the pair of perspective cam followers, the pair of transfer bars are moved downward by the wedge cam. Support can do. Accordingly, the pair of transfer bars are not separated by the wedge-shaped cam in the middle of lowering, but are separated by the action of the wedge-shaped cam after reaching the lowered end, so that the machining speed can be improved. Further, the pair of transfer bars can be lowered only by the downward biasing spring, and the wedge-shaped cam can be operated only to move apart.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention Explanation based on drawings To do.
[0029]
1 is a top view showing the entire transfer device, FIG. 2 is a longitudinal sectional view taken along the line AA on the longitudinal movement axis of FIG. 1, and FIG. 3 is a longitudinal drive mechanism, a vertical movement mechanism, and a transfer slide mechanism. 1 is an enlarged top view of the left side of FIG. 1, FIG. 4 is a vertical sectional view taken along the line BB on the longitudinal axis of FIG. 3, and FIG. 5 is a vertical perspective movement mechanism and a vertical perspective drive mechanism of FIG. CC is a vertical cross-sectional view, FIG. 6 is an enlarged vertical cross-sectional view of the upper part of FIG. 5 showing the vertical perspective movement mechanism, and FIG. 7 is an enlarged vertical cross-sectional view showing another embodiment of the vertical perspective movement mechanism shown in FIG. FIGS. 8A and 8B are operation timing charts showing the relationship between the vertical movement of the press slide and the forward / backward movement, vertical movement, and perspective movement of the pair of transfer bars.
[0030]
1 and 2, the transfer device of the present example has a pair of transfer bars 1A and 1B that can move back and forth in parallel at the upper position of the lower base 8 on the bolster 4 that is bridged and fixed to the frames 23A and 23B. In addition, a transfer slide mechanism 110 is provided in the direction of the longitudinal axis of movement, and a plurality of pairs of fingers 2A, 2B that can be opened and closed are attached to the pair of transfer bars 1A, 1B. A vertical movement mechanism 120, 120 that is guided by 3B and moves in the vertical direction; and a joint member that is provided so that the transfer slide mechanism 110 can be moved back and forth even before and after the pair of transfer bars 1A and 1B move up and down. A front / rear drive shaft that synchronizes with a press drive cam shaft that supports a press drive cam that drives a press slide (not shown). A front / rear drive mechanism 130 composed of a front / rear drive cam 7 of the shaft 6 and a reciprocating moving body 12 and a vertical / perspective drive for driving the vertical / perspective movement mechanisms 120, 120 to move the pair of transfer bars 1A, 1B up / down. It is comprised with the mechanism 140,140.
[0031]
FIG. 3 is an enlarged view of the left side of FIG. 1, and a reciprocating body 12 that enables the transfer bars 1A and 1B to move back and forth even when the pair of transfer bars 1A and 1B move up and down, and the transfer bar. It has a head bolt 15 which is a joint member connecting the bars 1A and 1B, a connecting base 16, pins 17A and 17B, a holder 18, a rod 19, a latch arm 20, connecting arms 21A and 21B, and rod bearings 22A and 22B. The positional relationship between the front / rear drive mechanism 130 and the front / rear drive mechanism 130 and the elevating platforms 3A, 3B that support the vertical movement mechanisms 120, 120 is shown. FIG. 4 is an enlarged longitudinal sectional view of FIG. 3, wherein the joint member, the die 9 provided on the lower base 8, the knockout 10, the lifting bases 3A, 3B, and the transfer bars 1A, 2B, 2B equipped with fingers 2A, 2B, The positional relationship of 1B is shown.
[0032]
Next, the configuration of the transfer slide mechanism 110, the vertical perspective movement mechanisms 120 and 120, the longitudinal drive mechanism 130, and the vertical perspective drive mechanisms 140 and 140 will be described with reference to FIGS. In the transfer slide mechanism 110, a pair of transfer bars 1A and 1B are provided with a plurality of pairs of fingers 2A and 2B that can be opened and closed, and the transfer bar 1A and 1B have two locations on the lower base 8 on the front end side and the rear end side. The lower surface is supported by elevators 3A and 3B provided in
[0033]
The transfer bars 1A and 1B are provided between the elevator bases 3A and 3B, perspective guide bodies 50A and 50B, and a base 51, which are front and rear perspective guide units. A, 51B The front and rear sliders 52A and 52B, the perspective sliders 53A and 53B, the front and rear guide bodies 54A and 54B, and the insole bases 55A and 55B are provided so as to be slidable in the front and rear directions. Yes.
[0034]
A front and rear drive camshaft 6 is supported by a bearing bracket 5 which is connected to a press drive camshaft (not shown) so as to rotate synchronously and is fixed to the bolster 4. By the rotation of the front / rear drive cam 7 fixed to the front / rear drive cam shaft 6, the transfer bars 1A and 1B reciprocate between the forward end position and the reverse end position via a joint member described later.
[0035]
The vertical and vertical movement mechanisms 120 and 120 are supported so as to be movable up and down in a vertical hole provided through a lower end surface of a peripheral hole of a hole drilled in the central part of the lifting platforms 3A and 3B and a lower base 8 attached to the bolster 4. The step engaging surfaces 25a of the lifting rods 25A, 25B are engaged, and when the lifting rods 25A, 25B are moved up, the lifting platforms 3A, 3B are also engaged so as to move up. Further, the wedge-shaped cam acts on the lowering / raising of the lifting rods 25A, 25B following the vertical movement of the lifting rods 25A, 25B, and the movement of the transfer bars 1A, 1B is operated.
[0036]
The front / rear drive mechanism 130 includes a portion that converts the linearly moving body 12 back and forth by the rotational motion of the front / rear drive camshaft 6 and a joint member that transmits this to the transfer bars 1A and 1B of the transfer slide mechanism 110. It is configured.
[0037]
In FIG. 3, the front / rear drive mechanism 130 is parallel to the bearing bracket 5 fixed to the bolster 4 with both shaft ends fixed to the bearing bracket 5 fixed on the plane perpendicular to the front / rear drive cam shaft 6. The reciprocating body 12 supported by the two front and rear guide shafts 11A and 11B is reciprocated in the front-rear direction according to the rotation of the front and rear driving cams 7 circumscribed by the front and rear cam followers 13A and 13B mounted on the reciprocating body 12. To be. The front and rear cam followers 13 </ b> A are fixed to the shaft, and the front and rear cam followers 13 </ b> B are fixed by adjusting the shaft center position with the rod end screw 14. A stopper 24 is provided at the retracted end of the reciprocating body 12.
[0038]
Next, the structure of the joint member for transmitting the reciprocating motion of the reciprocating body 12 to the transfer bars 1A and 1B is related to the groove 12a formed on the central upper surface on the forward end side in FIG. A connecting base 16 to which a headed bolt 15 having a matching head is fixed is fixed. The reciprocating transfer bars 1A and 1B move according to the operation timing not only in the front-rear direction but also in the perspective direction and the vertical direction. A joint member is provided between the coupling base 16 and the transfer bars 1A and 1B so that the slip pair is orthogonal to the movement in the near and near directions and the vertical direction.
[0039]
One sliding pair is formed by two parallel holes perforated in the connecting base 16 and a holder 18 in which two pins 17A and 17B sliding vertically are fixed, and the other sliding pair has two A plane passing through the axis of the pins 17A and 17B and an upper surface of the pair of transfer bars 1A and 1B When In parallel A rod 19 having an axis in the direction to be moved is brought into contact with the forward end surface 18a of the holder 18, and each of the rod 19 and the pair of transfer bars 1A and 1B sandwiched and fixed by a latching arm 20 having a hook-shaped protrusion. The rod bearings 22A and 22B provided in the connecting arms 21A and 21B fixed to the rear end side are formed so as to slide at both shaft ends of the rod 19 when the transfer bars 1A and 1B are moved near and far. Further, the transfer bars 1A and 1B can be moved up and down by the pins 17A and 17B with respect to the front and rear drive mechanism 130.
[0040]
FIG. 5 shows transfer slide mechanisms 110 and 110 provided with a pair of transfer bars 1A and 1B, vertical and vertical movement mechanisms 120 and 120 for moving the pair of transfer bars 1A and 1B up and down, and the up and down directions. The vertical movement mechanism mechanisms 140 and 140 for driving the vertical movement mechanism section and the perspective movement mechanism section of the movement mechanisms 120 and 120 in a related manner are shown.
[0041]
In the vertical perspective drive mechanism 140, 140 of this example, in FIG. 5, two sets of lifting platforms 3A, 3B are provided on the upper surface of the lower platform 8, respectively, on the front side and the rear side of the transfer bars 1A, 1B. Two vertical guide members for the lift platforms 3A and 3B are fixed to the lift platforms 3A and 3B by vertically projecting from the lower surfaces of the lift platforms 3A and 3B so that the lower base 8 can be accurately positioned and smoothly moved up and down. Guide bearings 35A and 35B provided with the upper and lower guide shafts 34A and 34B in the lower base 8 are provided corresponding to the upper and lower guide shafts 34A and 34B.
[0042]
The lift rods 25A and 25B are moved up and down by a pair of vertical drive cams 32A and 32B attached to a vertical drive cam shaft 31 that rotates in conjunction with a press drive cam shaft (not shown). The cam curve is designed so that the lifts 3A and 3B engage with the lifts 3A and 3B in the latter half of the rise, and the lifts 3A and 3B are lowered to the upper surface of the lower stand 8 in the first half of the lowering. In the latter half, the transfer bars 1A and 1B are moved far and near by the wedge-shaped cams 33A and 33B at the tips of the lifting rods 25A and 25B.
[0043]
Next, the engagement of the up-and-down / far-and-far moving mechanisms 120 and 120 with the up-and-down rods 25A and 25B for moving up and down the up-and-down tables 3A and 3B will be described.
[0044]
In the figure, the lifting platforms 3A and 3B have a stepped engagement surface 25a formed on the top of the lifting rods 25A and 25B from a position where they abut on the upper surface of the lower platform 8 and the lower end surfaces of the peripheral edges of the holes of the lifting platforms 3A and 3B. Ascending according to the cam curves of the vertical drive cams 32A and 32B formed so as to be in contact with each other and hold the position where the gap S is formed.
[0045]
The upper and lower rods 25A and 25B that are moved up and down are guided at the upper part by the guide hole 8a of the lower base 8, and are guided at the lower part by the guide plates 36A and 36B. Ascending biasing springs 37A and 37B are extrapolated between the upper surfaces of the guide plates 36A and 36B and the step portions of the lifting rods 25A and 25B, and the lifting rods 25A and 25B are biased upward. The cam groove 32a of the vertical drive cams 32A and 32B is formed continuously for the lift amount for the subsequent distance movement.
[0046]
The movements of the upper and lower cam followers 38A, 38B guided by the lift amount are caused by the swing angles of the swing levers 41A, 41B supported by the swing pivots 40A, 40B at the tips of the brackets 39A, 39B fixed to the bolster 4. Converted. Eventually, it is enlarged to the vertical displacement at the point where it is engaged with the connecting pieces 42A, 42B provided at the lower ends of the lifting rods 25A, 25B, and the lifting rods 25A, 25B are moved vertically.
[0047]
The elevating rods 25A and 25B are lowered, and wedge-shaped cams 33A and 33B fixed to the tips of the elevating rods 25A and 25B act. The wedge-shaped cams 33A and 33B have wedge-shaped cam surfaces 33a and 33a having lower ends at substantially the same radius as the outer diameters of the lifting rods 25A and 25B. ing. The perspective cam followers 43A and 43B provided on the upper and lower guide members come into contact with the wedge-shaped cam surfaces 33a and 33a, and the lifting platforms 3A and 3B are lowered to the upper surface of the lower table 8 by receiving the generated downward component force. As will be described later, it is possible to urge the lower guide shafts 34A, 34B downward by the lower urging springs 60A, 60B to positively lower them (see FIG. 7).
[0048]
FIG. 6 shows the vertical and vertical movement mechanisms 120 and 120 that move the pair of transfer bars 1A and 1B up and down, the engagement relationship between the wedge-shaped cams 33A and 33B and the front and rear perspective guide unit, the lifting rods 25A and 25B, and the lifting table. The relationship between 3A, 3B and the upper and lower guide members is shown. In FIG. 6, a pair of transfer bars 1A, 1B are arranged at the upper position of the series-connected die 9 so as to be movable in parallel and near each other across the transfer center axis of the workpiece, and move up and down with the transfer bars 1A, 1B. Between the bases 3A and 3B, there is provided a front / rear perspective guide base unit for moving and guiding the transfer bars 1A and 1B in the front and rear (front and back of FIG. 6 paper) direction and the perspective (left and right of FIG. 6 paper). .
[0049]
The up-and-down / perspective movement mechanism 120, 120 Center Elevating rods 25A and 25B are provided at the upper part so as to be movable up and down, and wedge-shaped cams 33A and 33B are attached to upper ends thereof. By moving and positioning the wedge cams 33A and 33B in the vertical direction, the transfer bars 1A and 1B move up and down and near and far.
[0050]
In the figure, the vertical and vertical movement mechanisms 120 and 120 of this example are provided with a pair of front and rear perspective guide base units at a lower position of the pair of transfer bars 1A and 1B, and are supported from the surface side of the vertical guide members. Lowering of the wedge-shaped cams 33A, 33B attached to the end of the upper shaft having the stepped engagement surfaces 25a of the lifting rods 25A, 25B for pushing up the lifting platforms 3A, 3B at the upper part of the shaft. Sometimes the elevators 3A, 3B are lowered to the upper surface of the lower base 8. Subsequently, it is composed of a pair of elevating rods 25A, 25B that act on the perspective cam followers 43A, 43B attached to the insole bases 55A, 55B of the front / rear distance guide base unit to separate the pair of transfer bars 1A, 1B. ing.
[0051]
The front / rear / front / rear guide table unit is arranged on the lift tables 3A, 3B in the front / rear / perspective directions so that the forward / reverse / feed of the transfer bars 1A, 1B and the near / far / forward of the approach / separation / movement are perpendicular to each other and can move smoothly. A linear bearing member that is freely movable is configured orthogonally.
[0052]
The linear bearing member is provided with opposed guide bodies 50A and 50B supported by linear bearings on the upper surfaces of the lift platforms 3A and 3B, and the lower surfaces of the bases 51A and 51B of the transfer bars 1A and 1B are linearly provided. It is supported by front and rear sliders 52A and 52B supported by bearings, and is located between the perspective sliders 53A and 53B of the perspective guides 50A and 50B and the front and rear guides 54A and 54B of the front and rear sliders 52A and 52B. Insole bases 55A and 55B for mounting both guides are provided. Protrusion pieces 56A and 56B bearing bearings of the perspective cam followers 43A and 43B that engage with the wedge-shaped cams 33A and 33B are attached to the approaching side end portions of the insole bases 55A and 55B, respectively.
[0053]
Further, the pressers 57A and 57B for pressing the insole bases 55A and 55B from the outer end surfaces of the insole bases 55A and 55B and the pneumatic actuators 58A and 58B as biasing members are provided on the lift base 3A. , 3B are provided on brackets 59A, 59B fixed to the outer end face. Each of the perspective cam followers 43A and 43B presses and contacts the wedge cam surfaces 33a and 33a of the wedge cams 33A and 33B at the upper shaft ends of the lifting rods 25A and 25B so as to face each other. When the lift rods 25A and 25B are at the rising ends, the perspective cam followers 43A and 43B are positioned at the closest positions by the wedge cam surfaces 33a and 33a of the wedge cams 33A and 33B.
[0054]
At the initial stage when the elevating rods 25A and 25B are lowered, the wedge-shaped cam surfaces 33a and 33a of the wedge-shaped cams 33A and 33B act on the perspective cam followers 43A and 43B, thereby moving the insole bases 55A and 55B downward. 3A and 3B are brought into contact with the upper surface of the lower base 8 and the elevating rods 25A and 25B are moved down to move the insole bases 55A and 55B so that the transfer bars 1A and 1B are separated from each other.
[0055]
As described above, the vertical and perspective drive mechanisms 140 and 140 move the vertical drive cams 32A and 32B that drive the vertical movements of the vertical rods 25A and 25B, the vertical cam followers 38A and 38B that are fitted in the cam grooves 32a, and the displacement amount thereof. Since the configuration of the swing levers 41A, 41B and the like transmitted to the rods 25A, 25B has already been described, the description thereof will be omitted. The cam grooves 32a of the vertical drive cams 32A and 32B are moved vertically to continuously operate the vertical movements of the lifting platforms 3A and 3B and the perspective movements of the transfer bars 1A and 1B. The action part and the perspective movement action part are formed so as to be continuous within one rotation angle.
[0056]
The lifts 3A and 3B are lifted by the step engaging surface 25a of the shaft with which the lift rods 25A and 25B engage, and a gap S is formed between the lifts 3A and 3B and the lower base 8. In this state, the fingers 2A and 2B move forward while gripping the workpiece. After that, when the lifting rods 25A and 25B are lowered, the lifting platforms 3A and 3B are also lowered following the lowering of the wedge cams 33A and 33B as described above.
[0057]
When the lifting rods 25A, 25B are lowered, the lowering biasing springs so that the engaging surfaces of the lifting platforms 3A, 3B and the lifting rods 25A, 25B are not separated and the lifting platforms 3A, 3B are seated on the upper surface of the lower platform 8. An example of another vertical guide member biased downward by 60A and 60B is shown in FIG. In the drawing, bolts 61A and 61B are attached to lower ends of the upper and lower guide shafts 34A and 34B by lowering biasing springs 60A and 60B for urging the upper and lower guide shafts 34A and 34B supported respectively by the guide bearings 35A and 35B. Supporting between the stepped surface of the head and the bottom surface of the drilled hole of the lower base 8, the elevating bases 3A and 3B are actively lowered.
[0058]
Next, the operation of the main components of the present example configured as described above will be described. The action of the joint member of the front / rear drive mechanism 130 of this example is as follows. In FIG. 3 and FIG. 4, the reciprocating moving body 12 that moves in the front-rear movement axis direction and the transfer bars 1A, 1B that move in the three directions The joint members are connected. In the vertical direction, the connecting base 16 fixed to the reciprocating body 12 and a pair of pins 17A and 17B fixed to the holder 18 slide, and in the perspective direction, fixed to the rear ends of the pair of transfer bars 1A and 1B. The holes of the rod bearings 22A and 22B fitted into the holes of the connecting arms 21A and 21B and the shafts of the rod 19 sandwiched between the holder 18 and the latching arm 20 at the center are slidably supported. 17A, 17B and the rod 19 are movable in the direction orthogonal to the two sliding shaft cores. Therefore, it is shown that the transfer bars 1A and 1B can move freely in the vertical direction and the perspective direction.
[0059]
Next, in FIG. 5 and FIG. 6, the operation of the vertical movement mechanisms 120 and 120 of the transfer slide mechanism 110 is performed by vertical movement of the lifting rods 25A and 25B and urging by the pneumatic actuators 58A and 58B. The movements of the upper and lower cam followers 38A and 38B fitted in the cam grooves 32a formed in the pair of upper and lower drive cams 32A and 32B that rotate in synchronization with the press drive cam shaft of a press drive cam that drives a press slide (not shown) are shaken. The movement of the universal connectors 44A and 44B at the tips of the moving levers 41A and 41B is enlarged.
[0060]
This amount of movement is the amount of vertical movement of the lifting rods 25A and 25B by moving the connecting pieces 42A and 42B screwed and positioned on the lower shaft ends of the lifting rods 25A and 25B up and down. The pair of elevating rods 25A, 25B is urged upward by the respective upward urging springs 37A, 37B. Since the weights of the transfer slide mechanism 110 and the lifting platforms 3A and 3B are large, the stepped engagement surfaces 25a of the shafts of the lifting rods 25A and 25B are latched by the fitting holes of the lifting platforms 3A and 3B. Therefore, when the pair of elevating rods 25A and 25B is driven upward by the vertical drive cams 32A and 32B, the elevating platforms 3A and 3B are raised by the gap amount S on the stepped engagement surface 25a.
[0061]
During the movement from the retracted end position of the transfer slide mechanism 110 to which the opposing fingers 2A and 2B move forward while gripping the workpiece from the retracted end position to the advanced end position, friction between the lower surface of the workpiece and the upper surface of the die 9 or the knockout 10 occurs. The gap S is held in order to avoid the occurrence. The action of the vertical guide member that supports the vertical movement of the pair of elevators 3A and 3B is provided below the elevator table 3A on the retracted end side and the elevator table 3B on the advanced end side, respectively. Two upper and lower guide shafts 34A and 34B projecting from the lower surface of the base are supported and guided by guide bearings 35A and 35B fitted in holes drilled in parallel on the lower base 8, and are vertically moved by a pair of lift rods 25A and 25B. It is to slide smoothly.
[0062]
5 and 6, the transfer slide mechanism 110 moves up and down by driving the vertical perspective drive mechanisms 140 and 140, and then the pair of transfer bars 1A and 1B. Are provided in the cam grooves 32a of the vertical drive cams 32A and 32B in order to give the lifting rods 25A and 25B two continuous operations of moving the fingers 2A and 2B provided opposite to each other to the gripping execution position and the non-grip position. A predetermined cam curve is engraved. While the transfer slide mechanism 110 is kept in the raised position, forward feeding is performed, and after the forward feeding is completed, the press slide is lowered and the vicinity time before reaching the bottom dead center position is selected to move the fingers 2A and 2B from the workpiece gripping position. A cam groove 32a is formed so as to further lower the elevating rods 25A and 25B so as to be separated to the gripping position.
[0063]
As described above, the vertical movement of the transfer slide mechanism 110 and the approaching / separation of the fingers 2A and 2B are performed by moving the lifting rods 25A and 25B up and down in two stages by the pair of vertical driving cams 32A and 32B. In this case, the transfer bars 1A and 1B provided on the lifting platforms 3A and 3B are secured by the function of a front / rear distance guide base unit that can freely perform front / rear feed and far / near feed orthogonal thereto.
[0064]
In the front / rear / perspective guide unit, sliding slide bearings are provided in the middle of the pedestals 51A and 51B that support the transfer bars 1A and 1B on the lifts 3A and 3B, respectively, by being fitted to the respective sliding surfaces. Therefore, the vertical lift 3A, 3B can be driven smoothly. Further, since the transfer bars 1A and 1B are fed up and down before and after the transfer slide mechanism 110 is forwardly fed, and the transfer bars 1A and 1B are fed forward and backward before and after the backward feed, the transfer slide mechanism 110 by the front and rear drive cam 7 is moved. A universal joint that slides and connects when the transfer bars 1A and 1B are moved up and down is used as a joint member for transmitting the front and rear feeds to ensure smooth movement of the transfer bars 1A and 1B.
[0065]
When the elevating rods 25A and 25B begin to descend by the vertical drive cams 32A and 32B, the wedge cams 33A and 33B attached to the upper ends of the elevating rods 25A and 25B expand the pair of perspective cam followers 43A and 43B. Pneumatic actuators 58A and 58B are provided to press in the direction of the wedge cams 33A and 33B from the outside of the insole bases 55A and 55B to which the perspective cam followers 43A and 43B are fixed, and faithfully follow the cam shapes of the wedge cams 33A and 33B. To do.
[0066]
The wedge cams 33A and 33B are lowered to separate the fingers 2A and 2B from the gripping position of the workpiece to the non-grip position. The lowering of the lifting platforms 3A and 3B pushes the perspective cam followers 43A and 43B by the lowering of the wedge-shaped cams 33A and 33B, but the lowering force at this time is generated as a vertical component force. As shown in FIG. 7, when the lower guide springs 60A and 60B are positively biased downward by the vertical guide shafts 34A and 34B protruding from the lower surfaces of the lift platforms 3A and 3B, the high speed of the lift rods 25A and 25B is high. It can also follow up and down movements.
[0067]
An operation timing diagram will be described with reference to FIG. In the figure, there are timings of forward / backward feed (front / rear drive cam 7), up / down feed and far / forward feed (up / down drive cams 32A, 32B) of the transfer bars 1A, 1B based on a press drive cam for driving a press slide (not shown). The horizontal axis indicates the rotation angle of the press drive cam, 0 degrees is the angular position at which the press slide starts to rise from the bottom dead center position, and 180 degrees is the angular position at which the press slide starts to descend from the top dead center position.
[0068]
In this example, while the transfer slide mechanism 110 moves forward from the retracted end position to the advanced end position, the dimension is slightly increased together with the fingers 2A and 2B, and the gap between the bottom surface of the work gripped by the fingers 2A and 2B and the upper surface of the die 9 is increased. It is important to select the rising timing so that the space is formed and the bottom surface of the workpiece does not slide on the top surface of the die 9 or the top surface of the knockout 10.
[0069]
The vertical movement of the transfer slide mechanism 110 is driven and moved up by the vertical and perspective drive mechanisms 140 and 140, and after the transfer slide mechanism 110 moves to the forward end, the lowering to the original position is completed at the forward end position. The pair of fingers 2 </ b> A and 2 </ b> B are moved not by themselves but by driving the vertical and perspective movement mechanisms 120 and 120. Before the fingers 2A and 2B move away from the work and reach the non-grip position of the work, the transfer bars 1A and 1B start to retreat from the forward end position to the retreat end position and before the fingers reach the retreat end, the fingers 2A and 2B grasp the work. Grab the workpiece close to the position. In this way, the return end position return from the forward end position of the transfer slide mechanism 110 is completed. The front and rear drive cams 7 and the vertical drive cams 32A and 32B are interlocked with the press drive cam shaft of the press drive cam to ensure the operation timing of the vertical and perspective operations of the transfer bars 1A and 1B.
[0070]
(1) 0 degree ≦ rotation angle of press drive cam <90 degrees
The angle position where the rotating press drive cam is 0 degrees is the completion position of the press work that has been rotated 20 degrees after the press slide reaches the bottom dead center position, and the punch starts to rise from the bottom dead center position together with the press slide. Then, the intermediate position is reached at an angular position of 90 degrees. At this time, the workpiece is raised by a punch and a knockout 10 (not shown). During this time, the transfer slide mechanism 110 maintains a position where the distance of the transfer bar 1A, 1B is the most distant non-gripping position and a position where the vertical movement position is the lower end position. The press drive cam reaches the retracted end position at an angular position of 35 degrees.
[0071]
In the transfer bars 1A and 1B, when the press drive cam is at an angular position of 30 degrees, the lifting rods 25A and 25B start to rise by the vertical drive cams 32A and 32B, and are energized by the pneumatic actuators 58A and 58B. To start approaching. During the approach, the fingers 2A and 2B come into contact with the workpiece and reach the gripping execution position that is closest to the 70-degree angle position, and the gripping of the workpiece is completed. Note that the ascending movement position of the lifting rods 25A and 25B at this point is the position immediately before the stepped engagement surface 25a comes into contact with the lower end surface of the peripheral edge of the lifting platform 3A or 3B, and grips the workpiece. The transfer bars 1A and 1B maintain the lower end position.
[0072]
(2) 90 degrees ≦ rotation angle of press drive cam <180 degrees
In the press slide, the press drive cam reaches the top dead center position at an angular position of 160 degrees from the intermediate position of the ascent, and starts to descend at an angular position of 180 degrees. During this time, the transfer bars 1A and 1B continuously hold the workpiece with the fingers 2A and 2B. As for the vertical movement position, the press drive cam starts to rise at an angular position of 100 degrees and reaches the rising end position at an angular position of 120 degrees.
[0073]
That is, the elevating rods 25A and 25B reach the ascending movement position where the stepped engagement surface 25a abuts the lower end surfaces of the peripheral edges of the elevating platforms 3A and 3B by the vertical drive cams 32A and 32B. Further, when the lifting rods 25A and 25B are lifted, the transfer bars 1A and 1B are lifted to the lifted end position together with the lifting platforms 3A and 3B.
[0074]
At this time, since the knockout 10 stands by at the rising end position where the fingers 2A and 2B grip the workpiece, the bottom surface of the workpiece continues from the top surface of the die 9 as well as from the top surface of the knockout 10. Is gripped. Further, the forward / backward movement position is such that the press drive cam starts the forward movement for transferring the workpiece by the forward / backward drive cam 7 at the angular position of 125 degrees, and reaches the forward intermediate position at the angular position of 180 degrees.
[0075]
(3) 180 degrees ≦ rotation angle of press drive cam <270 degrees
In the press slide, the press driving cam starts to descend at an angular position of 180 degrees, and reaches a descending intermediate position at an angular position of 270 degrees. During this time, the transfer bars 1A, 1B reach the forward end position at the angular position of 215 degrees from the forward intermediate position in a state where the workpieces are continuously gripped. By reaching this forward end position, the workpiece is transferred to the upper surface position of the die 9 provided downstream of one machining step.
[0076]
The vertical movement position is such that the press drive cam immediately after this is at an angular position of 220 degrees, and the lifting rods 25A, 25B are lowered by the vertical drive cams 32A, 32B, and the wedge cam surfaces 33a, 33a of the wedge cams 33A, 33B. As a result, the transfer bars 1A and 1B together with the lifting platforms 3A and 3B start to descend. The elevating rods 25A and 25B are continuously lowered and reach the lowered end position where the lower end surfaces of the elevating platforms 3A and 3B abut on the upper end surface of the lower platform 8 at an angular position of 240 degrees.
[0077]
Thereafter, the descending movement of the lifting rods 25A, 25B is temporarily stopped, and the press drive cam starts to descend again at an angular position of 270 degrees. Then, while the transfer bars 1A and 1B reach the lower end position and the lowering movement of the elevating rods 25A and 25B is temporarily stopped, the punch is engaged with the gripped work. The punch that is continuously lowered has the press drive cam at an angular position of approximately 270 degrees, the lower end of the press cam reaches the bottom inner surface of the workpiece, and clamps the bottom of the workpiece with the waiting knockout 10. This work is still gripped by the fingers 2A and 2B.
[0078]
(4) 270 degrees ≦ rotation angle of press drive cam <360 degrees
The press slide further descends from the lower intermediate position, presses the workpiece into the die 9 by punching, squeezes and performs ironing, and the press drive cam reaches the bottom dead center position at an angular position of 340 degrees, and 360 degrees The processing by pressurizing the punch is completed at the angle position of 0 degrees. During this time, the transfer bars 1A and 1B still maintain the lower end position at the forward end position, and the lift rods 25A and 25B that have been temporarily stopped at the angular position of 270 degrees are the vertical drive cams 32A. , 32B starts to descend again. Then, the transfer bars 1A and 1B start moving so that the perspective cam followers 43A and 43B are pushed apart by the wedge-shaped cam surfaces 33a and 33a of the wedge-shaped cams 33A and 33B so as to be separated from the gripping execution position. The most distant non-gripping position is reached. Thus, even if the transfer bars 1A and 1B are separated from each other, since the work is urged by the opening and closing urging springs 26A and 26B of the fingers 2A and 2B at the beginning of the separation, the work is still gripped. The work is released from the fingers 2A and 2B until the transfer bars 1A and 1B reach the most separated non-grip position. Further, the forward and backward movement positions of the transfer bars 1A and 1B are set such that the press drive cam immediately before reaching the non-grip position where the distance movement position is the most separated starts to move backward at an angular position of 305 degrees, and moves backward at an angular position of 360 degrees. It reaches a halfway position. Thus, one press processing cycle is completed, and the press drive cam rotates continuously and repeatedly, so that press processing can be performed continuously.
[0085]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
[0090]
Claim 1 According to the invention of When transferring the workpiece, the bottom surface of the workpiece does not slidably contact the top surface of the die or the top surface of the knockout, and the bottom surface of the workpiece is not rubbed. While moving to and from the non-grip position, the need for using a spreader becomes unnecessary, while maintaining the effect of facilitating high-speed machining, The up / down / distance movement mechanism is configured to move the elevating rod up and down by the up / down / distance driving mechanism, thereby providing a pair of elevating platforms and a pair of front / rear perspective guides. unit The transfer slide mechanism is moved upward and downward, and the lifting rod is moved downward, whereby a pair of perspective cam followers and a pair of front and rear perspective guides unit And move down a pair of transfer bars via Separation Since it moves, there is an effect that the structure of the transfer device corresponding to high-speed machining can be simplified and inexpensive.
[0091]
Claim 2 According to the invention, the vertical / perspective drive mechanism raises the transfer slide mechanism at least during the forward movement from the backward end position to the forward end position by rotating the vertical drive cam in association with the forward / backward drive mechanism. The pair of transfer bars are moved closer to the gripping execution position at the start of gripping of the workpiece by the finger at least at the retracted end position so that the workpiece is gripped. Because the vertical movement mechanism is driven so that the vertical movement of the transfer slide mechanism is moved to the non-grip position at the release start time when the movement is started from the finger at the forward end position, the transfer slide mechanism is pressed during high-speed machining. It can be easily matched with the processing timing.
[0092]
Claim 3 According to the present invention, since the vertical movement mechanism is provided with the pair of downward biasing springs, the pair of transfer bars are moved downward by the wedge cam. Support As a result, the pair of transfer bars are not separated by the wedge-shaped cam in the middle of lowering, but are separated by the action of the wedge-shaped cam after reaching the lowered end, so that the machining speed can be improved.
[Brief description of the drawings]
Embodiments according to the transfer device of the present invention are shown in FIGS. 1 to 8 as follows.
FIG. 1 is an explanatory view showing the entire transfer device, and is a top view thereof.
FIG. 2 is an explanatory view showing the entire upper part of the transfer device, and is a longitudinal sectional view taken along the line AA on the longitudinal axis of FIG.
3 is an explanatory view showing a front-rear drive mechanism, a vertical movement mechanism, and a transfer slide mechanism, and is an enlarged top view of the left side of FIG.
4 is an explanatory view showing a front-rear drive mechanism, a vertical perspective movement mechanism, and a transfer slide mechanism, and is a vertical cross-sectional view taken along the line B-B on the front-rear movement axis in FIG.
5 is an explanatory view showing a vertical perspective moving mechanism and a vertical perspective driving mechanism, and is a vertical cross-sectional view taken along the line CC of the vertical perspective moving mechanism center line perpendicular to the longitudinal axis of FIG.
6 is an explanatory view showing a vertical perspective moving mechanism, and is an enlarged vertical sectional view of the upper part of FIG.
7 is an explanatory view showing another embodiment of the up / down / near-displacement moving mechanism shown in FIG. 6, and is an enlarged vertical sectional view thereof. FIG.
FIG. 8 is an explanatory diagram showing the relationship between the vertical movement of the press slide and the back-and-forth movement, vertical movement, and perspective movement of a pair of transfer bars, and an operation timing chart based on the rotation angle of the press drive cam. is there.
[Explanation of symbols]
1A, 1B transfer bar
2A, 2B finger
3A, 3B lifting platform
6 Front / rear drive camshaft
7 Front / rear drive cam
8 Lower platform
9 die
10 Knockout
12 Reciprocating body
25A, 25B Lifting rod
26A, 26B Open / close bias spring
32A, 32B Vertical drive cam
32a Cam groove
33A, 33B Wedge cam
33a wedge-shaped cam surface
34A, 34B Vertical guide shaft
35A, 35B Guide bearing
38A, 38B Upper and lower cam followers
41A, 41B Swing lever
43A, 43B Perspective cam follower
44A, 44B Universal connector
50A, 50B Perspective guide
51A, 51B base
52A, 52B Front and rear slider
53A, 53B Perspective slider
54A, 54B Front and rear guide
55A, 55B insole
58A, 58B Pneumatic actuator
60A, 60B Lowering spring
110 Transfer slide mechanism
120 Vertical movement mechanism
130 Front-rear drive mechanism
140 Vertical Perspective Drive Mechanism

Claims (3)

前後移動可能な1対のトランスファバーに開閉可能な複数対のフインガを各対ごとに対向して装着可能なトランスファスライド機構と、このトランスファスライド機構を前後往復移動させる前後駆動機構とをトランスファプレスに設けて、その上流工程のワークを下流工程に順次移送する装置であって、前記トランスファスライド機構の1対のトランスファバーは、直列されたダイの上側位置でワークの移送中心軸線を挟んで平行かつ遠近移動可能に設けて前記前後駆動機構と上下移動自在に連結し、このトランスファスライド機構を上下移動させるとともに前記1対のトランスファバーを前記フィンガがワークを把持可能な把持実行位置と把持不可能な非把持実行位置とにワークの移送中心軸線を挟んで遠近移動させる上下遠近移動機構と、前記トランスファスライド機構を少なくとも後退端位置から前進端位置に前進移動する間では上昇させ次の前進開始までの間に下降させるように、かつ、前記1対のトランスファバーを少なくとも後退端位置で前記フィンガによってワークの把持を開始する把持開始時期までに把持実行位置に接近移動させ把持されたワークを前進端位置で前記フィンガから解放を開始する解放開始時期に非把持位置に離隔移動させるように前記上下遠近移動機構を駆動する上下遠近駆動機構とを備えて、前記トランスファスライド機構が後退端位置から前進端位置に前進移動する間は、このトランスファスライド機構をそのフィンガとともに上昇させることで、そのフィンガに把持されたワークの底面とダイの上面との間に空間を形成してワークを下流工程に移送するとともに、少なくとも後退端位置で把持開始時期までに把持実行位置と、前進端位置で解放開始時期に非把持位置とに前記1対のトランスファバーを関連的に遠近移動するようにしたトランスファ装置において、前記上下遠近移動機構は、前記1対のトランスファバーの各々を前後遠近移動自在であるように各々の下側位置に設けた少なくとも1対の前後遠近案内台ユニットと、この1対の前後遠近案内台ユニットをその上面で前後・遠近方向に移動自在なリニア軸受部材で構成し前記1対のトランスファバーを上下移動可能であるように下台の上側位置で上下移動可能な1対の昇降台と、この1対の昇降台を上下移動可能に各々案内する1対の上下案内部材と、前記1対の前後遠近案内台ユニットの遠近移動する対向端部に各々設けた1対の遠近カムフオロアと、上昇移動することで前記1対の昇降台を上昇させるようにこの1対の昇降台に各々掛止されて上下移動可能な昇降ロッドと、この昇降ロッドの上端部に設けられ下降移動することで前記1対の遠近カムフオロアを介して前記1対の昇降台を下台に当接するまで各々下降させ下台に当接した後もさらに下降移動することで前記1対の遠近カムフオロアを介して前記前後遠近案内台ユニットを押し拡げて各々離隔移動させる楔状カムと、この楔状カムに前記1対の遠近カムフオロアが各々当接するように前記1対の前後遠近案内台ユニットを付勢可能に前記1対の昇降台に各々設けられた1対の付勢部材とを含んでなり、前記昇降ロッドを前記上下遠近駆動機構により上昇移動させることで、前記1対の昇降台と前記1対の前後遠近案内台ユニットとを介して前記一対のトランスファバを上昇移動させるとともに前記付勢部材で接近移動させ、前記昇降ロッドを下降移動させることで、前記1対の遠近カムフオロアと前記1対の前後遠近案内台ユニットとを介して前記1対のトランスファバーを下降移動、かつ、離隔移動するようにしたことを特徴とするトランスファ装置。The transfer press includes a transfer slide mechanism capable of mounting a plurality of pairs of fingers that can be opened and closed on a pair of transfer bars that can be moved back and forth, and a front and rear drive mechanism that reciprocates the transfer slide mechanism back and forth. And a pair of transfer bars of the transfer slide mechanism are parallel to each other across the transfer center axis of the workpiece at the upper position of the serially connected dies. It is provided so as to be movable in the distance and is connected to the front and rear drive mechanism so as to be movable up and down. The transfer slide mechanism is moved up and down, and the pair of transfer bars are held at a gripping execution position where the fingers can grip a workpiece and cannot be gripped. A vertical and vertical movement mechanism that moves the workpiece to the non-gripping execution position with the transfer center axis in between. The transfer slide mechanism is lifted at least during the forward movement from the retracted end position to the advanced end position, and is lowered until the next forward start, and the pair of transfer bars is at least at the retracted end position. To move the gripping workpiece closer to the gripping execution position by the gripping start time to start gripping the workpiece, and move the gripped workpiece to the non-grip position at the release start timing to start releasing from the finger at the forward end position. A vertical / distance drive mechanism that drives the perspective movement mechanism, and while the transfer slide mechanism moves forward from the retracted end position to the advanced end position, the transfer slide mechanism is lifted together with the finger so that the finger Create a space between the bottom surface of the gripped workpiece and the top surface of the die to work the workpiece downstream With transport, and to be associated to distance moved at least a grip running position until the grip start time in backward end position, the pair of transfer bars and a non-gripping position to the release start timing in the forward end position bets on In the transfer device , the vertical movement mechanism includes at least one pair of front / rear perspective guide table units provided at lower positions of the pair of transfer bars so as to be movable in the front / rear direction. The front / rear / perspective guide unit is composed of a linear bearing member that is movable in the front / rear / perspective direction on its upper surface, and a pair of vertically movable upper and lower positions so that the pair of transfer bars can be moved vertically. and the elevation frame, respectively the lifting platform of the pair and the upper and lower guide members of a pair of each guide vertically movably, at opposite ends of perspective movement of the front and rear perspective guide table unit of the pair A provided pair of perspective cam followers, a lifting rod which is respectively hooked on the pair of lifting platforms so as to be lifted to move up the pair of lifting platforms, and an upper end of the lifting rod The pair of lifting and lowering bases are moved down through the pair of perspective cam followers until they come into contact with the lower base, and further moved down after coming into contact with the lower base by moving downward. A wedge-shaped cam that pushes and expands the front / rear perspective guide base unit via a perspective cam follower and moves each of them apart from each other, and the pair of front / rear perspective guide base units are attached so that the pair of perspective cam followers abut each other. A pair of urging members respectively provided on the pair of lifting platforms so as to be capable of being biased, and by moving the lifting rod up and down by the vertical perspective drive mechanism, the pair of lifting platforms Wherein is moved closer by the biasing member along with the increasing moving the pair of transfer bars via a pair of front and rear perspective guide table unit, by downward movement of the elevating rods, the said pair of perspective cam follower downward movement of said pair of transfer bars through the front and rear perspective guide table unit pair, and wherein the to belt attempt to transfer apparatus that was set to away movement. 前記上下遠近駆動機構は、揺動可能に一端部がボルスタ部に枢支され端部が前記上下遠近移動機構の前記昇降ロッドの下端部と関節状に係着された揺動レバーと、この揺動レバーに回転可能に設けられた上下カムフオロアと、この上下カムフオロアと当接して前記揺動レバーを揺動可能なカム曲面が形成されて前記前後駆動機構と関連的に回転可能な上下駆動カムとを含んでなり、この上下駆動カムが前記前後駆動機構と関連的に回転することで、前記トランスファスライド機構を少なくとも後退端位置から前進端位置に前進移動する間では上昇させ、次の前進開始までの間に下降させるように、かつ、前記1対のトランスファバーを少なくとも後退端位置で前記フィンガによってワークの把持を開始する把持開始時期までに把持実行位置に接近移動させ、把持されたワークを前進端位置で前記フィンガから解放を開始する解放開始時期に非把持位置に離隔移動させるように前記上下遠近移動機構を駆動するようにしたことを特徴とする請求項に記載のトランスファ装置。The vertical distance drive mechanism includes a swing lever which other end one end swingably is pivotally supported on the bolster portion is engaged with the lower end and articulated of the elevating rod of the vertical distance movement mechanism, this An upper and lower cam follower rotatably provided on the swing lever, and a vertical drive cam that is in contact with the upper and lower cam follower and has a cam curved surface that can swing the swing lever and is rotatable in relation to the front and rear drive mechanism The vertical drive cam rotates in association with the front-rear drive mechanism, so that the transfer slide mechanism is raised at least during the forward movement from the backward end position to the forward end position, and the next forward start is started. The gripping execution position by the gripping start time at which the pair of transfer bars starts gripping the workpiece by the finger at least at the retracted end position. The vertical movement mechanism is driven so that the workpiece is moved closer and moved to a non-gripping position at a release start timing at which the gripped workpiece starts to be released from the finger at the forward end position. Item 4. The transfer device according to Item 1 . 前記上下遠近移動機構には、一端は前記下台に掛止させ他端は前記1対の昇降台に各々掛止させて前記1対の昇降台を各々下方に常時付勢する1対の下降付勢ばねを設けて、この1対の下降付勢ばねによって前記1対の昇降台を常時下方に付勢することで、前記昇降ロッドを下降移動させて前記1対の遠近カムフオロアを介して前記1対のトランスファバーを下降移動させる際に、前記楔状カムによる前記1対のトランスファバーの下降移動に加勢するようにしたことを特徴とする請求項またはに記載のトランスファ装置。Wherein the vertical distance movement mechanism, one end with the descent of the pair and the other end is hooked to the lower stand is that each always urged downward elevation frame of the pair and is hooked each lifting table of said pair A biasing spring is provided, and the pair of lowering and urging springs are always biased downward by the pair of lowering biasing springs, whereby the lifting rod is moved downward and the first and second cam followers are used to when lowering moves the pair of transfer bars, the transfer device according to claim 1 or 2, characterized in that so as to helping the downward movement of the pair of transfer bars by the wedge cam.
JP27610999A 1999-09-29 1999-09-29 Transfer device Expired - Fee Related JP3771757B2 (en)

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