JP2005021904A

JP2005021904A - Mechanism for adjusting material feeding amount of press machine

Info

Publication number: JP2005021904A
Application number: JP2003187206A
Authority: JP
Inventors: Atsuhiro Kin; 厚博金; Masao Hayakawa; 真佐雄早川; Yohei Noguchi; 洋平野口
Original assignee: Asahi Seiki Manufacturing Co Ltd
Current assignee: Asahi Seiki Manufacturing Co Ltd
Priority date: 2003-06-30
Filing date: 2003-06-30
Publication date: 2005-01-27

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that an oscillation lever interferes with the other constituent element and a cam at a driving part must be replaced because a material feeding amount can not be adjusted in a wide range in a mechanism for adjusting the material feeding amount of a gripper feed device. <P>SOLUTION: A shaft hole 41a of the oscillation lever 41 is composed as follows. A slot hole, by which an insertion position of an oscillation shaft 42 can be adjusted, is formed on the axis of both arm parts 41b, 41c. A perpendicular female screw is engraved to the oscillation shaft 42 at a part inserted into a body part of the oscillation lever 41. A rotatable adjusting bolt 45, which is screwed to the female screw of the oscillation shaft 42, is provided to the body part of the oscillation lever 41. The oscillation lever 41 is moved along the slot hole to the oscillation shaft 42 by the adjusting bolt 45. Therefore, it is possible to adjust the material feeding amount by adjusting a lever ratio of the primary side and the secondary side of the oscillation lever 41. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、長尺板状の材料を挟持してプレス機械の加工部へ間欠的に順次給送するグリッパフィード装置の材料送り量調整機構に関するものである。
【０００２】
【従来の技術】
従来の技術として、例えば市販されているプレス機械に適用された、図９、図１０に示すグリッパフィード装置の材料送り量調整機構が知られている。この装置の給送基台１１２は、案内軸１１１に沿って図９の左右方向へ進退移動可能に設けられて、この給送基台１１２の上面には給送台１１３が一体的に取着されている。
【０００３】
その給送台１１３上の材料Ｍは、下連結板１１７を上下（矢印方向）移動させることで、給送台１１３と下連結板１１７に連動された押圧板１２１とで挟持させたり、挟持状態を解放したりすることができ、挟持した状態で給送基台１１２の（右方）前進移動によりプレス機械Ｐの加工部へ給送される。材料Ｍの給送時期はプレス加工時期と同期しなければならないので、プレス機械Ｐの回転動力により図示しないベルトを介してプーリ１２７を回転させて、給送基台１１２を進退移動させる。
【０００４】
プーリ１２７の回転運動を給送基台１１２の往復運動に変換するには、回転する側面カム１３２のカム面１３２ｆ，１３２ｂの軸方向への位置変移により往復移動体１３４を往復運動させ、一次側リンク１４６、揺動レバー１４１、二次側リンク１４８を介して給送基台１１２を往復移動させる。揺動レバー１４１は、偏心軸１４２により揺動可能に支承され、その偏心軸１４２の回動角度調整により、揺動レバー１４１の一次側と二次側とのレバー比を調整することで、材料Ｍの送り量を調整することができる。
【０００５】
図１０において、偏心軸１４２は、両端部のジャーナル部１４２ｋが軸心Ｏｋで、揺動レバー１４１の軸方向両側に設けられた図示しない軸受筒に各々回動可能に支承されている。これらジャーナル部１４２ｋに挟まれた中央部には、ジャーナル部１４２ｋの軸心Ｏｋに対して偏心量γだけ偏心した軸心Ｏｅで止着部１４２ｅが連設され、この止着部１４２ｅに揺動レバー１４１が一体的に止着されている。この装置において、材料Ｍの送り量を調整する際には、ジャーナル部１４２ｋの軸心Ｏｋを中心にして、半径が偏心量γの円周上で止着部１４２ｅの軸心Ｏｅを回動調整し、偏心軸１４２の止着部１４２ｅに揺動レバー１４１を止着する。
【０００６】
そして、揺動レバー１４１のレバー比を図１０（ａ）の最小レバー比Ｒａ＝二次側レバー長Ｃａ／一次側レバー長Ｂａにおける移動量Ｓａ＝Ａ×Ｒａと、図１０（ｂ）の最大レバー比Ｒｂ＝二次側レバー長Ｃｂ／一次側レバー長Ｂｂにおける移動量Ｓｂ＝Ａ×Ｒｂとの間で調整し、材料Ｍの送り量を調整することができる（一次側の移動量Ａは一定）。偏心量γが大きくなるにつれて、移動量Ｓａはより小さくなり、移動量Ｓｂはより大きくなる。したがって、側面カム１３２を交換することなく、材料Ｍの送り量を広範囲に調整するには、偏心軸１４２のジャーナル部１４２ｋと止着部１４２ｅとの偏心量γを大きくする必要がある。
【０００７】
【発明が解決しようとする課題】
しかしながら、上記の発明において、偏心軸１４２のジャーナル部１４２ｋと止着部１４２ｅとの偏心量γを大きくすると、偏心軸１４２の各軸径を大きくする必要があるので、揺動レバー１４１の胴径も大きくしなければならない。その上、ジャーナル部１４２ｋの軸心Ｏｋに対する止着部１４２ｅの軸心Ｏｅの回動半径が大きくなるので、揺動レバー１４１が図９に示す立板２Ｆ，２Ｇに干渉するという問題があった。この制約のために、偏心量γを小さくすると、材料Ｍの送り量を広範囲に調整する場合には、側面カム１３２を交換しなければならないので、多大な段取り工数を要するという問題があった。
【０００８】
例えば、図１０（ａ）の状態において、側面カム１３２の各カムライズを５ｍｍとすると、一次側リンク１４６の移動量Ａ＝５ｍｍである。また、揺動レバー１４１に連結される揺動ピン１４７と揺動ピン１４９との間を７６ｍｍとし、偏心軸１４２の回動調整位置をジャーナル部１４２ｋの軸心Ｏｋに対して、止着部１４２ｅの軸心Ｏｅを真下に偏心量γ＝１ｍｍの状態で揺動レバー１４１を止着し、レバー比Ｒａ＝二次側レバー長Ｃａ／一次側レバー長Ｂａ＝３７／３９＝０．９５とすると、二次側リンク１４８の移動量Ｓａ＝Ａ×Ｒａ＝５×０．９５＝４．７５ｍｍとなる。
【０００９】
これに対して、図１０（ｂ）において、側面カム１３２の各カムライズは常時一定であるから、一次側リンク１４６の移動量Ａ＝５ｍｍである。また、偏心軸１４２の回動調整位置をジャーナル部１４２ｋの軸心Ｏｋに対して、止着部１４２ｅの軸心Ｏｅを真上に偏心量γ＝１ｍｍの状態で揺動レバー１４１を止着し、レバー比Ｒｂ＝二次側レバー長Ｃｂ／一次側レバー長Ｂｂ＝３９／３７＝１．０５とすると、二次側リンク１４８の移動量Ｓｂ＝Ａ×Ｒｂ＝５×１．０５＝５．２５ｍｍとなる。すなわち、側面カム１３２による一次側の移動量５ｍｍに対して、材料Ｍの送り量が、４．７５〜５．２５ｍｍの間でしか調整できない。
【００１０】
本発明は、このような問題点に鑑みてなされたものであって、その目的とするところは、プレス機械の加工部へ材料を順次給送するグリッパフィード装置の材料送り量調整機構において、揺動レバーが他の構成要素と干渉するという問題や、材料の送り量が広範囲に調整できず駆動部のカムを交換するために多大な段取り工数を要するという問題などを解決しようとするものである。
【００１１】
【課題を解決するための手段】
上記課題を解決するために請求項１の発明は、長尺板状の材料を挟持してプレス機械の加工部へ間欠的に順次給送するグリッパフィード装置の材料送り量調整機構であって、前記材料を上面に載置可能でかつ給送方向へ進退移動可能な給送台と、この給送台上で上下移動可能に設けられ下方へ付勢するコイルばねにより前記材料を前記給送台の上面との間に押圧して挟持可能な押圧板と、前記給送台を前記押圧板とともに前記材料の給送時期には前進させ停止時期には後退させる給送台駆動手段と、この給送台駆動手段と前記給送台との間で回動可能に支承された揺動軸と、胴部の軸対称位置に腕部が突設されその胴部に前記揺動軸が挿通される軸穴が形成された揺動レバーと、この揺動レバーの一方の腕部と前記給送台駆動手段とに連結され前記揺動レバーを揺動させる一次側リンクと、前記揺動レバーの他方の腕部と前記給送台とに連結され前記給送台を進退移動させる二次側リンクと、前記材料の停止時期には前記コイルばねの付勢力に抗して前記押圧板を上昇させ前記材料を挟持状態から解放する押圧板上昇手段と、前記給送台および前記押圧板が前記材料を解放して後退する際に当該材料を抑止可能な材料抑止手段とを含んでグリッパフィード装置を構成し、前記揺動レバーの軸穴は前記揺動軸を挿通位置調整可能な長穴を両腕部の軸線上に形成し、前記揺動レバーの胴部内に挿通された部分の前記揺動軸には直交する雌ねじを螺刻し、前記揺動レバーの胴部には前記揺動軸の雌ねじと螺合して回動可能な調整ボルトを設けてなり、この調整ボルトにより前記揺動軸に対して前記揺動レバーをその長穴に沿って移動させることで、前記揺動レバーの一次側と二次側とのレバー比を調整し前記材料の送り量を調整するようにしたものである。
【００１２】
この請求項１の発明によれば、揺動レバーの軸穴は両腕部の軸線上に長穴を形成し、その揺動レバーの胴部には揺動軸に直交して螺刻した雌ねじと螺合する調整ボルトを設けて、この調整ボルトにより揺動軸に対して揺動レバーをその長穴に沿って移動させることで、揺動レバーの一次側と二次側とのレバー比を調整し材料の送り量を調整するようにしたので、揺動軸に対する揺動レバーの移動量を大きくしても、揺動レバーが他の構成要素と干渉しないから、材料の送り量が広範囲に調整できるとともに、駆動部のカムを交換する必要もない。
【００１３】
次いで、請求項２の発明は、前記揺動レバーの一方の腕部と前記一次側リンクとを揺動可能に連結する一次側の揺動ピン、または、前記揺動レバーの他方の腕部と前記二次側リンクとを揺動可能に連結する二次側の揺動ピンの少なくとも１個の揺動ピンは、前記揺動レバーの腕部に回動位置調整可能に軸止めされるジャーナル部に対して、前記一次側リンクまたは前記二次側リンクを揺動可能に支承する偏心軸部を偏心させて、当該揺動ピンを回動位置調整することで、前記揺動レバーの一次側と二次側とのレバー比を調整し前記材料の送り量を調整するようにしたものである。
【００１４】
この請求項２の発明によれば、揺動レバーに一次側リンクを連結する一次側の揺動ピン、または、二次側リンクを連結する二次側の揺動ピンの少なくとも１個の揺動ピンは、揺動レバーの腕部に軸止めされるジャーナル部に対して、一次側リンクまたは二次側リンクを支承する偏心軸部を偏心させて、当該揺動ピンを回動位置調整することで、揺動レバーの一次側と二次側とのレバー比を調整し材料の送り量を調整するようにしたので、材料の送り量がさらに広範囲に調整できる。
【００１５】
次いで、請求項３の発明は、長尺板状の材料を挟持してプレス機械の加工部へ間欠的に順次給送するグリッパフィード装置の材料送り量調整機構であって、前記材料を上面に載置可能でかつ給送方向へ進退移動可能な給送台と、この給送台上で上下移動可能に設けられ下方へ付勢するコイルばねにより前記材料を前記給送台の上面との間に押圧して挟持可能な押圧板と、前記給送台を前記押圧板とともに前記材料の給送時期には前進させ停止時期には後退させる給送台駆動手段と、この給送台駆動手段と前記給送台との間で回動可能に支承されるジャーナル部に対して偏心した止着部を連設した偏心軸と、胴部の軸対称位置に腕部が突設されその胴部に前記偏心軸の止着部が挿通される軸穴が形成された揺動レバーと、この揺動レバーの一方の腕部と前記給送台駆動手段とに連結され前記揺動レバーを揺動させる一次側リンクと、前記揺動レバーの他方の腕部と前記給送台とに連結され前記給送台を進退移動させる二次側リンクと、前記材料の停止時期には前記コイルばねの付勢力に抗して前記押圧板を上昇させ前記材料を挟持状態から解放する押圧板上昇手段と、前記給送台および前記押圧板が前記材料を解放して後退する際に当該材料を抑止可能な材料抑止手段とを含んでグリッパフィード装置を構成し、前記揺動レバーの一方の腕部と前記一次側リンクとを揺動可能に連結する一次側の揺動ピン、または、前記揺動レバーの他方の腕部と前記二次側リンクとを揺動可能に連結する二次側の揺動ピンの少なくとも１個の揺動ピンは、前記揺動レバーの腕部に回動位置調整可能に軸止めされるジャーナル部に対して、前記一次側リンクまたは前記二次側リンクを揺動可能に支承する偏心軸部を偏心させて、当該揺動ピンを回動位置調整することで、前記揺動レバーの一次側と二次側とのレバー比を調整し前記材料の送り量を調整するようにしたものである。
【００１６】
この請求項３の発明によれば、揺動レバーに一次側リンクを連結する一次側の揺動ピン、または、二次側リンクを連結する二次側の揺動ピンの少なくとも１個の揺動ピンは、揺動レバーの腕部に軸止めされるジャーナル部に対して、一次側リンクまたは二次側リンクを支承する偏心軸部を偏心させて、当該揺動ピンを回動位置調整することで、揺動レバーの一次側と二次側とのレバー比を調整し材料の送り量を調整するようにしたので、従来技術の偏心軸による材料送り量調整機構に対して、揺動ピンを偏心させたものに取り替えるだけで、材料の送り量がさらに広範囲に調整できる。
【００１７】
【発明の実施の形態】
本発明のプレス機械の材料送り量調整機構に係る実施の形態について、図１〜図８を参照して以下のとおり説明する。
【００１８】
図１は本発明に係る材料送り量調整機構が組込まれているグリッパフィード装置を示す縦断面図、図２は図１のＡ−Ａ矢視断面図、図３は図１のＢ−Ｂ矢視断面図、図４は図１のＣ−Ｃ矢視断面図、図５は図１のＤ−Ｄ矢視断面図、図６は図１の材料送り量調整機構部の拡大図、図７は材料送り量調整機構部のレバー比を示す説明図、図８は第２実施例に係る図１のＡ−Ａ矢視断面図である。
【００１９】
材料送り量調整機構５が組込まれるグリッパフィード装置１は、プレス機械Ｐの側面に取着された枠体２内に設けられ、長尺板状の材料Ｍを給送台１３と押圧板２１とで挟持してプレス機械の加工部へ給送可能な材料挟持機構３と、この材料挟持機構３を材料Ｍの給送時期には前進させ停止時期には後退させる給送台駆動機構４と、この給送台駆動機構４からの動力を材料挟持機構３に伝達するとともに材料挟持機構３の進退移動量を調整する材料送り量調整機構５と、材料Ｍの停止時期に材料挟持機構３を挟持状態から解放する押圧板上昇機構６と、材料挟持機構３が材料Ｍを解放して後退する際に材料Ｍを抑止可能な材料抑止機構７とから構成されている。
【００２０】
まず、実施例１について説明する。枠体２は、図１に示すように、プレス機械Ｐの側面に右側板２Ａが取着されており、その下端に止着された底板２Ｂに左側板２Ｃが立設され、右側板２Ａと左側板２Ｃとの中段部には横板２Ｄが橋設されている。また、底板２Ｂと横板２Ｄとの間に立板２Ｅが立設され、横板２Ｄには、立板２Ｆと立板２Ｇとが平行に立設されている。
【００２１】
次いで、材料挟持機構３は、枠体２の立板２Ｆと右側板２Ａとに２本の案内軸１１，１１が図４のように並設されており、これらの案内軸１１，１１は給送基台１２に各々挿通され、この給送基台１２を図１の左右方向へ進退移動案内する。その給送基台１２の上面には、上面に材料Ｍを載置可能に形成された給送台１３が一体的に取着されている。
【００２２】
また、給送基台１２の図４に示す左右には、２本の案内支柱１６，１６が並列して上下移動可能に各々挿通され、これらは、下側の下連結板１７と上側の上連結板１８とにより連結されている。上連結板１８の下面には、給送台１３上に載置された材料Ｍを押圧可能に形成された押圧板２１が一体的に取着され、押圧板２１を挟む左右両側の上連結板１８には、ばね軸２２，２２が挿通され、その下端が給送基台１２に取着されている。
【００２３】
ばね軸２２，２２の上端部に各々取着された、ばね止め２３，２３と上連結板１８との間には、各々コイルばね２４，２４が介装されており、上連結板１８を介して押圧板２１により、給送台１３上の材料Ｍを常時下方へ押圧可能に各々付勢されている。したがって、給送台１３上の材料Ｍは、下連結板１７を上下移動させることで、給送台１３と押圧板２１とで挟持させたり、挟持状態を解放したりすることができる。
【００２４】
次いで、給送台駆動機構４は、図１に示す枠体２の底板２Ｂにプーリ軸２６が鉛直軸線上で回転可能に支承され、その下側にプーリ２７が軸着され、上側には原動傘歯車２８が軸着されている。また、枠体２の右側板２Ａと左側板２Ｃとには、カム軸２９が水平軸線上で回転可能に支承され、カム軸２９の左側に従動傘歯車３１が原動傘歯車２８と噛合可能に軸着され、この従動傘歯車３１の左側には側面カム３２が軸着されている。
【００２５】
この側面カム３２は、外周面と直交する両側のカム面３２ｆ，３２ｂが、１回転する間の回転角度に対応して軸方向へ位置変移するカム曲面に形成されている。また、枠体２の左側板２Ｃと立板２Ｇとには、２本の案内軸３３が図１における水平位置に並設されており（図１は断面図であるため図示は１本）、これら２本の案内軸３３は往復移動体３４に各々挿通され、この往復移動体３４を図１の左右方向へ進退移動案内する。
【００２６】
その往復移動体３４の下側には垂下体３５が垂設され、その下面には回転可能な２個のカムフォロア３６，３６が、側面カム３２のカム面３２ｆ，３２ｂと外接可能に取着されている。したがって、プレス機械Ｐの回転動力を図示しないベルトを介してプーリ２７から側面カム３２に伝達される回転運動は、側面カム３２のカム面３２ｆ，３２ｂの位置変移により往復移動体３４を往復運動させることができる。
【００２７】
次いで、材料送り量調整機構５は、図６に示す給送基台１２と往復移動体３４との間で、揺動レバー４１の軸穴４１ａに挿通された揺動軸４２が、図２，図３に示す前側板２Ｈに取着された軸受筒４３と、後側板２Ｊに取着された軸受筒４４とに回動可能に支承されている。揺動レバー４１は、胴部内に揺動軸４２を挿通可能な幅の軸穴４１ａが、揺動軸４２を挿通可能な幅の長穴状に形成され、胴部外の図２に示す上側には、軸穴４１ａの長穴軸線上で軸対称位置にヨーク状の腕部４１ｂ，４１ｃが各々突設されている。
【００２８】
また、揺動レバー４１の両端部には軸穴４１ａの長穴軸線上に溝４１ｄ，４１ｄと溝４１ｅ，４１ｅとが各々形成され、そのうちの溝４１ｅ，４１ｅと連続する内側には、調整ボルト４５の小径部４５ａ，４５ｂを挿通可能な幅の溝４１ｆ，４１ｆが形成されている。揺動軸４２には、その軸線と直交する揺動レバー４１の溝４１ｆ，４１ｆの中心線上に、調整ボルト４５の雄ねじ部４５ｃと螺合可能な雌ねじ４２ａが螺刻されている。調整ボルト４５の図２に示す左右方向への移動は、その頭部と雄ねじ部４５ｃとの段差により規制されている。
【００２９】
また、揺動レバー４１の一方の腕部４１ｂには、一次側リンク４６が揺動ピン４７により揺動可能に支承され、この一次側リンク４６の他端は図６に示す往復移動体３４の右下部と連結されている。他方の腕部４１ｃには、二次側リンク４８が揺動ピン４９により揺動可能に支承され、この二次側リンク４８の他端は給送基台１２の左端部と連結されている。
【００３０】
また、揺動軸４２上の揺動レバー４１は、両端側の滑動環５１，５２により軸方向への移動ができないように設けられている。一方の滑動環５１の突部５１ａは揺動レバー４１の溝４１ｄ，４１ｄと滑合可能に形成され、他方の滑動環５２の突部５２ａは揺動レバー４１の溝４１ｅ，４１ｅと滑合可能に形成されている。この滑動環５２には、図３に示す並列位置に締着ボルト５３，５３を挿通可能で、揺動レバー４１の軸穴４１ａの長穴軸線と平行な長穴５２ｂ，５２ｂが形成され、滑動環５２は、締着ボルト５３，５３により揺動レバー４１に締め付けされる。
【００３１】
したがって、揺動レバー４１は、給送台駆動機構４の往復移動体３４からの動力を材料挟持機構３の給送基台１２に伝達するとともに、締着ボルト５３，５３を緩めた状態にして調整ボルト４５を回動させることにより、揺動軸４２に対して軸穴４１ａの長穴軸線に沿って移動させることで、揺動レバー４１の一次側と二次側とのレバー比を調整することができる。
【００３２】
すなわち、図７において、揺動レバー４１のレバー比を図７（ａ）のレバー比Ｒａ＝二次側レバー長Ｃａ／一次側レバー長Ｂａと、図７（ｂ）のレバー比Ｒｂ＝二次側レバー長Ｃｂ／一次側レバー長Ｂｂとの間で調整し、材料挟持機構３の進退移動量を調整することができる。
【００３３】
次いで、押圧板上昇機構６は、図１，図４に示すカム軸２９に、起伏カム面５５ａが外周に形成された外周カム５５が軸着され、外周カム５５の上部には、上下移動体５７の下端部に取着されたカムフォロア５６が回転可能に外接して上下移動可能に設けられている。上下移動体５７には２本の案内ピン５８，５８が下端張出し部の上面から突出して各々止着されている。これら案内ピン５８，５８の突出部は横板２Ｄの案内穴に上下移動可能に挿通され、上下移動体５７を案内する。
【００３４】
また、上下移動体５７の上端部にはカムフォロア５９が、材料挟持機構３の下連結板１７の下面と当接して回転可能に取着されている。したがって、カムフォロア５６と外接する外周カム５５の起伏カム面５５ａが、小径部から大径部に移り変わると、上下移動体５７の上昇により、カムフォロア５９、下連結板１７、案内支柱１６，１６、上連結板１８を介して、コイルばね２４，２４により給送台１３上の材料Ｍを下方へ押圧している押圧板２１を、コイルばね２４，２４の押圧力に抗して上昇させ、材料挟持機構３を挟持状態から解放することができる。
【００３５】
次いで、材料抑止機構７は図１，図５に示すように、案内軸１１，１１上の材料挟持機構３よりもプレス機械Ｐ側寄りに、抑止基台６２が、枠体２の前側板２Ｈと後側板２Ｊとに取着されている。その抑止基台６２の上面には、上面に材料Ｍを載置可能に形成された抑止台６３が一体的に取着されている。また、抑止基台６２の図５に示す左右には、２本の案内支柱６６，６６が並列して上下移動可能に各々挿通され、これらは、下側の下連結板６７と上側の上連結板６８とにより連結されている。
【００３６】
上連結板６８の下面には、抑止台６３上に載置された材料Ｍを押圧可能に形成された抑止押圧板７１が一体的に取着され、抑止押圧板７１を挟む左右両側の上連結板６８には、ばね軸７２，７２が挿通され、その下端が抑止基台６２に取着されている。ばね軸７２，７２の上端部に各々取着された、ばね止め７３，７３と上連結板６８との間には、各々コイルばね７４，７４が介装されており、上連結板６８を介して抑止押圧板７１により、抑止台６３上の材料Ｍを常時下方へ押圧可能に各々付勢されている。
【００３７】
また、図１，図５に示すカム軸２９に、起伏カム面７５ａが外周に形成された外周カム７５が軸着され、外周カム７５の上部には、下連結板６７の下面に取着されている上下移動体７７の下端部に取着されたカムフォロア７６が回転可能に外接して上下移動可能に設けられている。
【００３８】
したがって、カムフォロア７６と外接する外周カム７５の起伏カム面７５ａが、小径部から大径部に移り変わると、上下移動体７７の上昇により、下連結板６７、案内支柱６６，６６、上連結板６８を介して、コイルばね７４，７４により抑止台６３上の材料Ｍを下方へ押圧している抑止押圧板７１を、コイルばね７４，７４の押圧力に抗して上昇させ、材料抑止機構７を挟持状態から解放することができる。
【００３９】
引き続いて、プレス加工の１サイクル中における各部の作用について以下のとおり説明する。予め材料Ｍの送り量に合わせて揺動レバー比を調整しておく。
すなわち、図２、図６に示す調整ボルト４５を回動させて、揺動軸４２に対して揺動レバー４１を位置変移させることで、揺動レバー４１のレバー比を図７（ａ）のレバー比Ｒａ＝二次側レバー長Ｃａ／一次側レバー長Ｂａと、図７（ｂ）のレバー比Ｒｂ＝二次側レバー長Ｃｂ／一次側レバー長Ｂｂとの間で調整し、材料Ｍの送り量を調整することができる。
【００４０】
例えば、図７（ａ）において、側面カム３２の各カムライズを５ｍｍとすると、一次側リンク４６の移動量Ａ＝５ｍｍである。また、揺動レバー４１に連結される揺動ピン４７と揺動ピン４９との間を７６ｍｍとし、揺動軸４２に対して、揺動レバー４１を前記７６ｍｍの中間位置から一次側リンク４６側へ調整量γａ＝８ｍｍ変移させ、レバー比Ｒａ＝二次側レバー長Ｃａ／一次側レバー長Ｂａ＝３０／４６＝０．６５とすると、二次側リンク４８の移動量Ｓａ＝Ａ×Ｒａ＝５×０．６５＝３．２５ｍｍとなる。
【００４１】
これに対して、図７（ｂ）において、側面カム３２の各カムライズは常時一定であるから、一次側リンク４６の移動量Ａ＝５ｍｍである。また、揺動軸４２に対して、揺動レバー４１を前記７６ｍｍの中間位置から二次側リンク４８側へ調整量γｂ＝８ｍｍ（図７（ａ）の位置からの合計調整量γａ＋γｂ＝８＋８＝１６ｍｍ）変移させ、レバー比Ｒｂ＝二次側レバー長Ｃｂ／一次側レバー長Ｂｂ＝４６／３０＝１．５３とすると、二次側リンク４８の移動量Ｓｂ＝Ａ×Ｒｂ＝５×１．５３＝７．６５ｍｍとなる。
【００４２】
すなわち、材料Ｍの送り量が、３．２５〜７．６５ｍｍの間であれば、側面カム３２を取り替えることなく材料Ｍの送り量を調整することができる。この例では、揺動軸４２に対して、揺動レバー４１を合計調整量γａ＋γｂ＝１６ｍｍ変移させて実施したが、従来技術のように揺動軸４２は偏心していないので、揺動レバー４１が立板２Ｆや立板２Ｇに干渉することはない。
【００４３】
プレス機械Ｐにより材料Ｍに前回のプレス加工が終わる直前においては、材料挟持機構３は、図４に示す押圧板２１の上昇で材料Ｍが解放状態で、図１に示す左寄りの後退位置で待機しており、材料抑止機構７は、図５に示す抑止押圧板７１の押圧により材料Ｍが抑止状態で各々待機している。この状態から、カム軸２９が回転されることで、カムフォロア５６に外接する外周カム５５の起伏カム面５５ａが、大径部から小径部に転じて押圧板２１の下降により材料Ｍを給送台１３に押圧して挟持する。
【００４４】
その直後には、カムフォロア７６に外接する外周カム７５の起伏カム面７５ａが、小径部から大径部に転じて抑止押圧板７１の上昇により材料Ｍを抑止状態から解放する。次に、側面カム３２のカム面３２ｆ，３２ｂが、図１に示す右寄りの後退位置から左寄りに位置変移することで、カムフォロア３６，３６、垂下体３５、往復移動体３４、一次側リンク４６を介して揺動レバー４１を時計方向に揺動させ、さらに、二次側リンク４８を介して給送基台１２を図１に示す左寄りの後退位置から右寄りに前進させる。
【００４５】
この給送基台１２の前進により、材料Ｍは、給送台１３と押圧板２１とで挟持された状態で設定の送り量だけプレス機械Ｐの加工部へ給送される。材料Ｍの送り量は、側面カム３２のカム面３２ｆ，３２ｂの各カムライズと、揺動レバー４１のレバー比とで設定される。そのうち、側面カム３２の各カムライズは常時一定であるから、送り量を調整することはできない。
【００４６】
次に、材料Ｍが設定の送り量だけプレス機械Ｐの加工部へ給送されると、外周カム７５の起伏カム面７５ａが、大径部から小径部に転じて抑止押圧板７１の下降により材料Ｍを抑止台６３に押圧して解放状態から抑止する。その直後には、外周カム５５の起伏カム面５５ａが、小径部から大径部に転じて押圧板２１の上昇により材料Ｍを挟持状態から解放する。
【００４７】
次に、側面カム３２のカム面３２ｆ，３２ｂが、左寄りの前進位置から図１に示す右寄りに位置変移することで、カムフォロア３６，３６、垂下体３５、往復移動体３４、一次側リンク４６を介して揺動レバー４１を反時計方向に揺動させ、さらに、二次側リンク４８を介して給送基台１２を右寄りの前進位置から図１に示す左寄りに後退させ、後退端位置で待機させる。上記の間において、材料Ｍへのプレス加工は、設定の送り量だけプレス機械Ｐの加工部へ給送された材料Ｍが抑止された直後から、後退端位置で待機している給送基台１２が前進を開始するまでの間に行われる。以上で、プレス加工の１サイクルが終わる。
【００４８】
引き続いて、実施例２について、図８を参照して以下のとおり説明する。なお、図８は第１実施例の図２に対して、揺動レバー４１に一次側リンク４６、二次側リンク４８を連結する揺動ピンのみが相違する構成であって、他は同一であるので図２と同一の符号を付して詳細な説明は省略する。
【００４９】
揺動レバー４１の腕部４１ｂに、一次側リンク４６を連結する揺動ピン４７Ａは、腕部４１ｂに回動位置調整可能に支承される大径軸部４７ａと、小径軸部４７ｃとは同一軸心であり、この軸心に対して、一次側リンク４６を揺動可能に支承する偏心軸部４７ｂを偏心量γｃだけ偏心させたものである。また、他方の腕部４１ｃに、二次側リンク４８を連結する揺動ピン４９Ａは、腕部４１ｃに回動位置調整可能に支承される大径軸部４９ａと、小径軸部４９ｃとは同一軸心であり、この軸心に対して、二次側リンク４８を揺動可能に支承する偏心軸部４９ｂを偏心量γｄだけ偏心させたものである。
【００５０】
そして、図８のように、揺動ピン４７Ａの偏心軸部４７ｂを揺動軸４２に近づけるように偏心量γｃだけ偏心させ、揺動ピン４９Ａの偏心軸部４９ｂを揺動軸４２から遠ざかるように偏心量γｄだけ偏心させた場合には、実施例１の図７（ｂ）におけるレバー比Ｒｂ＝二次側レバー長Ｃｂ／一次側レバー長Ｂｂに対して、本例ではレバー比Ｒｘ＝二次側レバー長（Ｃｂ＋γｄ）／一次側レバー長（Ｂｂ−γｃ）となる。したがって、実施例１よりもさらに大きなレバー比にして、材料の送り量がさらに広範囲に調整できる。
【００５１】
引き続いて、実施例３について以下のとおり説明する。この実施例３は、従来の技術による材料送り量調整機構に対して適用されるものであって、その揺動ピンの構成は実施例２の図８と同一であるので詳細な説明は省略する。例えば、図１０に示す揺動ピン１４７を揺動ピン４７Ａに、または、揺動ピン１４９を揺動ピン４９Ａに置き替えることで、従来技術の偏心軸による材料送り量調整機構よりもさらに大きなレバー比にして、材料の送り量がさらに広範囲に調整できる。
【００５２】
なお、本発明に係るプレス機械の材料送り量調整機構は、上述した実施の形態に何ら限定されるものではなく、本発明の要旨を逸脱しない範囲においてさまざまな形態に構成することができる。
【００５３】
【発明の効果】
本発明は、上述したように構成したので、以下に記載するような効果を奏する。
【００５４】
請求項１の発明によれば、揺動レバーの軸穴は両腕部の軸線上に長穴を形成し、その揺動レバーには揺動軸の雌ねじと螺合して回動可能な調整ボルトを設けて、この調整ボルトにより揺動軸に対して揺動レバーをその長穴に沿って移動させることで、揺動レバーの一次側と二次側とのレバー比を調整し材料の送り量を調整するようにしたので、揺動軸に対する揺動レバーの移動量を大きくしても、揺動レバーが他の構成要素と干渉しないから、材料の送り量が広範囲に調整できるとともに、駆動部のカムを交換する必要もない。その結果、多品種加工への対応が容易になるとともに、段取り時間の省力化を図ることができる。
【００５５】
次いで、請求項２の発明によれば、揺動レバーに一次側リンクを連結する一次側の揺動ピン、または、二次側リンクを連結する二次側の揺動ピンの少なくとも１個の揺動ピンは、揺動レバーの腕部に軸止めされるジャーナル部に対して、一次側リンクまたは二次側リンクを支承する偏心軸部を偏心させて、当該揺動ピンを回動位置調整することで、揺動レバーの一次側と二次側とのレバー比を調整し材料の送り量を調整するようにしたので、材料の送り量がさらに広範囲に調整できる。
【００５６】
次いで、請求項３の発明によれば、揺動レバーに一次側リンクを連結する一次側の揺動ピン、または、二次側リンクを連結する二次側の揺動ピンの少なくとも１個の揺動ピンは、揺動レバーの腕部に軸止めされるジャーナル部に対して、一次側リンクまたは二次側リンクを支承する偏心軸部を偏心させて、当該揺動ピンを回動位置調整することで、揺動レバーの一次側と二次側とのレバー比を調整し材料の送り量を調整するようにしたので、従来技術の偏心軸による材料送り量調整機構に対して、揺動ピンを偏心させたものに取り替えるだけで、材料の送り量がさらに広範囲に調整できる。
【図面の簡単な説明】
【図１】本発明に係る材料送り量調整機構が組込まれているグリッパフィード装置を示す説明図であって、その縦断面図である。
【図２】同じく、図１のＡ−Ａ矢視断面図である。
【図３】同じく、図１のＢ−Ｂ矢視断面図である。
【図４】同じく、図１のＣ−Ｃ矢視断面図である。
【図５】同じく、図１のＤ−Ｄ矢視断面図である。
【図６】同じく、図１の材料送り量調整機構部の拡大図である。
【図７】同じく、材料送り量調整機構部のレバー比を示す説明図である。
【図８】同じく、第２実施例に係る図１のＡ−Ａ矢視断面図である。
【図９】従来の技術に係る材料送り量調整機構が組込まれているグリッパフィード装置を示す説明図であって、その縦断面図である。
【図１０】同じく、材料送り量調整機構のレバー比を示す説明図である。
【符号の説明】
１グリッパフィード装置
３材料挟持機構
４給送台駆動機構
５材料送り量調整機構
６押圧板上昇機構
７材料抑止機構
１２給送基台
１３給送台
２１押圧板
２９カム軸
３２側面カム
４１揺動レバー
４１ａ軸穴
４２揺動軸
４５調整ボルト
４６一次側リンク
４８二次側リンク
５５外周カム
６３抑止台
７１抑止押圧板
Ａ移動量（一次側）
Ｍ材料
Ｐプレス機械
Ｒａ，Ｒｂレバー比
Ｓａ，Ｓｂ移動量（二次側）
γａ，γｂ調整量[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a material feed amount adjusting mechanism of a gripper feed device that sandwiches a long plate-like material and intermittently feeds it sequentially to a processing part of a press machine.
[0002]
[Prior art]
As a conventional technique, for example, a material feed amount adjusting mechanism of a gripper feed device shown in FIGS. 9 and 10 applied to a commercially available press machine is known. The feeding base 112 of this apparatus is provided so as to be movable back and forth in the left-right direction in FIG. 9 along the guide shaft 111, and the feeding base 113 is integrally attached to the upper surface of the feeding base 112. Has been.
[0003]
The material M on the feeding table 113 is moved between the feeding table 113 and the pressing plate 121 interlocked with the lower coupling plate 117 by moving the lower coupling plate 117 up and down (in the arrow direction). In the sandwiched state, the feed base 112 is fed to the processing section of the press machine P by the forward movement (rightward). Since the feeding timing of the material M must be synchronized with the pressing time, the pulley 127 is rotated via a belt (not shown) by the rotational power of the press machine P, and the feeding base 112 is moved forward and backward.
[0004]
In order to convert the rotational motion of the pulley 127 into the reciprocating motion of the feed base 112, the reciprocating body 134 is reciprocated by the axial displacement of the cam surfaces 132f and 132b of the rotating side cam 132, and the primary side The feed base 112 is reciprocated through the link 146, the swing lever 141, and the secondary side link 148. The swing lever 141 is supported by the eccentric shaft 142 so as to be swingable. By adjusting the rotation angle of the eccentric shaft 142, the lever ratio between the primary side and the secondary side of the swing lever 141 is adjusted. The feed amount of M can be adjusted.
[0005]
In FIG. 10, the eccentric shaft 142 is rotatably supported by bearing cylinders (not shown) provided on both sides in the axial direction of the swing lever 141 with the journal portions 142 k at both ends being the shaft center Ok. At the center portion between the journal portions 142k, a fastening portion 142e is continuously provided with an axial center Oe that is eccentric by an eccentric amount γ with respect to the axial center Ok of the journal portion 142k, and swings around the fastening portion 142e. The lever 141 is fixed integrally. In this apparatus, when adjusting the feed amount of the material M, the shaft center Oe of the fastening portion 142e is rotated and adjusted on the circumference of the eccentric amount γ with the center of the shaft center Ok of the journal portion 142k. Then, the swing lever 141 is fixed to the fixing portion 142e of the eccentric shaft 142.
[0006]
Then, the lever ratio of the oscillating lever 141 is set such that the minimum lever ratio Ra = secondary lever length Ca / movement amount Sa = A × Ra in the primary lever length Ba in FIG. 10A and the maximum in FIG. Lever ratio Rb = secondary lever length Cb / moving amount Sb = A × Rb in primary lever length Bb can be adjusted to adjust the feed amount of material M (primary moving amount A is Constant). As the amount of eccentricity γ increases, the amount of movement Sa becomes smaller and the amount of movement Sb becomes larger. Therefore, in order to adjust the feed amount of the material M over a wide range without replacing the side cam 132, it is necessary to increase the eccentric amount γ between the journal portion 142k and the fastening portion 142e of the eccentric shaft 142.
[0007]
[Problems to be solved by the invention]
However, in the above invention, when the eccentric amount γ between the journal portion 142k and the fastening portion 142e of the eccentric shaft 142 is increased, it is necessary to increase the diameter of each shaft of the eccentric shaft 142. Must also be larger. In addition, since the turning radius of the shaft center Oe of the fastening portion 142e with respect to the shaft center Ok of the journal portion 142k is increased, there is a problem that the swing lever 141 interferes with the standing plates 2F and 2G shown in FIG. . Due to this restriction, if the amount of eccentricity γ is reduced, the side cam 132 must be replaced when adjusting the feed amount of the material M over a wide range.
[0008]
For example, in the state of FIG. 10A, if each cam rise of the side cam 132 is 5 mm, the movement amount A of the primary side link 146 is 5 mm. Further, the distance between the swing pin 147 connected to the swing lever 141 and the swing pin 149 is 76 mm, and the rotational adjustment position of the eccentric shaft 142 is set to the fixed portion 142e with respect to the shaft center Ok of the journal portion 142k. When the swing lever 141 is fixed with the eccentric amount γ = 1 mm and the lever ratio Ra = secondary lever length Ca / primary side lever length Ba = 37/39 = 0.95. The amount of movement of the secondary side link 148 is Sa = A × Ra = 5 × 0.95 = 4.75 mm.
[0009]
On the other hand, in FIG. 10B, each cam rise of the side cam 132 is always constant, so that the movement amount A of the primary side link 146 is 5 mm. Further, the pivoting lever 141 is fixed with the eccentric amount γ = 1 mm with the rotational adjustment position of the eccentric shaft 142 set to the axial center Ok of the journal portion 142k and the axial center Oe of the fixing portion 142e right above. Assuming that the lever ratio Rb = secondary lever length Cb / primary lever length Bb = 39/37 = 1.05, the movement amount Sb = A × Rb = 5 × 1.05 = 5. 25 mm. That is, the feed amount of the material M can be adjusted only between 4.75 and 5.25 mm with respect to the primary side movement amount of 5 mm by the side cam 132.
[0010]
The present invention has been made in view of such problems, and an object of the present invention is to provide a material feed amount adjustment mechanism of a gripper feed device that sequentially feeds materials to a processing portion of a press machine. It is intended to solve the problem that the moving lever interferes with other components and the problem that the feed amount of the material cannot be adjusted in a wide range and the cam of the drive unit needs to be replaced, which requires a lot of setup man-hours. .
[0011]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention of claim 1 is a material feed amount adjustment mechanism of a gripper feed device that sandwiches a long plate-like material and intermittently feeds it sequentially to a processing part of a press machine, The material is placed on the feeding table by a feeding table that can be placed on the upper surface and can be moved back and forth in the feeding direction, and a coil spring that is movably moved up and down on the feeding table and biases downward. A pressing plate that can be pressed between the upper surface of the sheet and a feeding table driving means that moves the feeding table together with the pressing plate at the feeding time of the material and moves backward at the stopping time, and the feeding plate. An oscillating shaft that is rotatably supported between the feeding base driving means and the feeding base, and an arm portion projecting at an axially symmetric position of the trunk portion, and the oscillating shaft is inserted into the trunk portion. The swing lever formed with the shaft hole, one arm portion of the swing lever, and the feed base driving means are connected. A primary side link that swings the swing lever, a secondary link that is connected to the other arm of the swing lever and the feed base, and moves the feed base forward and backward, and a stop timing of the material Includes a pressing plate raising means for raising the pressing plate against the urging force of the coil spring to release the material from the clamping state, and when the feeding base and the pressing plate are retracted by releasing the material. And a material restraining means capable of restraining the material to form a gripper feed device, and the shaft hole of the swing lever is formed with an elongated hole on the axis of both arms so that the position of the swing shaft can be adjusted. Then, a female screw orthogonal to the rocking shaft of the portion inserted into the body of the rocking lever is threaded, and the body of the rocking lever is screwed with the female screw of the rocking shaft. A movable adjustment bolt is provided. It said rocking lever by moving along the elongated hole Te, in which adjusting the lever ratio between the primary side and the secondary side of the rocking lever to adjust the feeding amount of the material.
[0012]
According to the first aspect of the present invention, the shaft hole of the swing lever is formed with an elongated hole on the axis of both arms, and the internal thread of the swing lever is threaded perpendicularly to the swing shaft. And adjusting the lever ratio between the primary side and the secondary side of the rocking lever by moving the rocking lever along the slot with respect to the rocking shaft. Since the feed amount of the material is adjusted and adjusted, even if the amount of movement of the rocking lever relative to the rocking shaft is increased, the rocking lever does not interfere with other components, so the material feed amount is wide. It can be adjusted and there is no need to replace the cam of the drive unit.
[0013]
Next, the invention according to claim 2 is directed to a primary swing pin that slidably connects one arm portion of the swing lever and the primary link, or the other arm portion of the swing lever. At least one swing pin of the swing pin on the secondary side that slidably connects the secondary side link is a journal portion that is pivotally fixed to the arm portion of the swing lever so that the rotational position can be adjusted. With respect to the primary side of the rocking lever, the eccentric shaft portion that pivotably supports the primary side link or the secondary side link is decentered and the rocking pin is adjusted in the rotational position. The feed ratio of the material is adjusted by adjusting the lever ratio with the secondary side.
[0014]
According to the second aspect of the present invention, at least one swing of the swing pin on the primary side that connects the primary side link to the swing lever or the swing pin on the secondary side that connects the secondary side link. For the pin, the eccentric shaft part that supports the primary side link or the secondary side link is eccentric with respect to the journal part that is pivotally fixed to the arm part of the rocking lever, and the pivoting position of the rocking pin is adjusted. Thus, since the material feed amount is adjusted by adjusting the lever ratio between the primary side and the secondary side of the swing lever, the material feed amount can be adjusted in a wider range.
[0015]
Next, the invention of claim 3 is a material feed amount adjusting mechanism of a gripper feed device that sandwiches a long plate-like material and intermittently feeds it sequentially to a processing part of a press machine, and the material is placed on the upper surface. Between the feeding table that can be placed and can be moved back and forth in the feeding direction, and a coil spring that can be moved up and down on the feeding table and biased downward, the material is placed between the upper surface of the feeding table. A pressing plate that can be pressed and clamped, a feeding table driving means that moves the feeding table together with the pressing plate at a feeding time of the material and moves backward at a stopping time, and the feeding table driving means, An eccentric shaft continuously connecting an eccentric fixing portion with respect to the journal portion rotatably supported between the feeding base and an arm portion projecting at an axially symmetric position of the trunk portion. A swing lever having a shaft hole through which the fastening portion of the eccentric shaft is inserted, and one of the swing levers A primary side link that is connected to the arm part and the feed base driving means and swings the swing lever, and is connected to the other arm part of the swing lever and the feed base to move the feed base forward and backward. A secondary side link to be moved, a pressing plate raising means for raising the pressing plate against a biasing force of the coil spring at the time of stopping the material, and releasing the material from a sandwiched state; the feeding table; The gripper feed device includes a material restraining means capable of restraining the material when the pressing plate releases the material and moves backward, and includes one arm portion of the swing lever and the primary side link. At least one of a swing pin on the primary side that can be swingably connected, or a swing pin on the secondary side that can swingably connect the other arm portion of the swing lever and the secondary side link. The swing pin can be adjusted to the pivot position on the arm of the swing lever. The eccentric shaft portion that supports the primary side link or the secondary side link so as to be swingable with respect to the journal portion to be stopped is decentered, and the swing pin is adjusted by rotating the swing pin so that the swing is performed. The feed ratio of the material is adjusted by adjusting the lever ratio between the primary side and the secondary side of the lever.
[0016]
According to the third aspect of the invention, at least one swing of the swing pin on the primary side that connects the primary side link to the swing lever or the swing pin on the secondary side that connects the secondary side link. For the pin, the eccentric shaft part that supports the primary side link or the secondary side link is eccentric with respect to the journal part that is pivotally fixed to the arm part of the rocking lever, and the pivoting position of the rocking pin is adjusted. Therefore, the lever ratio between the primary side and the secondary side of the swing lever is adjusted to adjust the material feed amount, so the swing pin is attached to the conventional material feed amount adjustment mechanism using the eccentric shaft. The material feed rate can be adjusted over a wider range simply by replacing it with an eccentric one.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment according to a material feed amount adjusting mechanism of a press machine of the present invention will be described as follows with reference to FIGS.
[0018]
1 is a longitudinal sectional view showing a gripper feed device in which a material feed amount adjusting mechanism according to the present invention is incorporated, FIG. 2 is a sectional view taken along arrow AA in FIG. 1, and FIG. 3 is an arrow BB in FIG. 4 is a cross-sectional view taken along the line CC of FIG. 1, FIG. 5 is a cross-sectional view taken along the line DD of FIG. 1, and FIG. 6 is an enlarged view of the material feed amount adjusting mechanism of FIG. Is an explanatory view showing the lever ratio of the material feed amount adjusting mechanism, and FIG. 8 is a cross-sectional view taken along the line AA of FIG. 1 according to the second embodiment.
[0019]
A gripper feed device 1 in which a material feed amount adjusting mechanism 5 is incorporated is provided in a frame 2 attached to a side surface of a press machine P, and a long plate-like material M is fed to a feed table 13 and a press plate 21. A material clamping mechanism 3 that can be sandwiched between and fed to the processing section of the press machine, a feed base drive mechanism 4 that moves the material clamping mechanism 3 forward at the feeding timing of the material M and reverses it at the stopping timing, The power from the feed base driving mechanism 4 is transmitted to the material clamping mechanism 3 and the material feed amount adjusting mechanism 5 that adjusts the amount of movement of the material clamping mechanism 3 and the material clamping mechanism 3 are clamped when the material M is stopped. The pressing plate raising mechanism 6 that releases from the state and the material restraining mechanism 7 that can restrain the material M when the material clamping mechanism 3 releases the material M and moves backward.
[0020]
First, Example 1 will be described. As shown in FIG. 1, the frame 2 has a right side plate 2A attached to the side surface of the press machine P, and a left side plate 2C erected on a bottom plate 2B fixed to the lower end thereof. A horizontal plate 2D is bridged in the middle step with the left side plate 2C. Further, a standing plate 2E is erected between the bottom plate 2B and the horizontal plate 2D, and a vertical plate 2F and a vertical plate 2G are erected in parallel on the horizontal plate 2D.
[0021]
Next, the material clamping mechanism 3 includes two guide shafts 11 and 11 arranged in parallel on the upright plate 2F and the right side plate 2A of the frame 2 as shown in FIG. Each of the feed bases 12 is inserted into the feed base 12, and the feed base 12 is guided to move forward and backward in the left-right direction in FIG. On the upper surface of the feeding base 12, a feeding base 13 formed on the upper surface so that the material M can be placed is integrally attached.
[0022]
In addition, two guide columns 16 and 16 are inserted in parallel on the left and right sides of the feed base 12 shown in FIG. 4 so as to be vertically movable. They are connected to the connecting plate 18. On the lower surface of the upper connecting plate 18, a pressing plate 21 formed so as to be able to press the material M placed on the feeding table 13 is integrally attached, and the left and right upper connecting plates sandwiching the pressing plate 21. In 18, spring shafts 22, 22 are inserted, and the lower ends thereof are attached to the feeding base 12.
[0023]
Coil springs 24, 24 are interposed between the spring stoppers 23, 23 and the upper connecting plate 18, which are respectively attached to the upper ends of the spring shafts 22, 22. The pressing plate 21 urges the material M on the feeding table 13 so as to be always pressed downward. Therefore, the material M on the feeding table 13 can be sandwiched between the feeding table 13 and the pressing plate 21 or can be released from the clamping state by moving the lower connecting plate 17 up and down.
[0024]
Next, the feed stand driving mechanism 4 includes a pulley shaft 26 that is rotatably supported on a vertical axis on the bottom plate 2B of the frame 2 shown in FIG. A bevel gear 28 is axially attached. Further, the cam shaft 29 is rotatably supported on the horizontal axis on the right side plate 2A and the left side plate 2C of the frame body 2, and the driven bevel gear 31 on the left side of the cam shaft 29 can be engaged with the driving bevel gear 28. A side cam 32 is pivotally attached to the left side of the driven bevel gear 31.
[0025]
The side cam 32 is formed as a cam curved surface in which the cam surfaces 32f and 32b on both sides orthogonal to the outer peripheral surface are displaced in the axial direction corresponding to the rotation angle during one rotation. In addition, two guide shafts 33 are juxtaposed in the horizontal position in FIG. 1 on the left side plate 2C and the upright plate 2G of the frame body 2 (FIG. 1 is a cross-sectional view, so one is shown). These two guide shafts 33 are respectively inserted into reciprocating bodies 34 and guide the reciprocating bodies 34 to move back and forth in the left-right direction in FIG.
[0026]
A hanging body 35 is suspended below the reciprocating body 34, and two rotatable cam followers 36, 36 are attached to the lower surface of the hanging body 35 so as to be externally connected to the cam surfaces 32f, 32b of the side cam 32. ing. Therefore, the rotational motion transmitted from the pulley 27 to the side cam 32 via the belt (not shown) through the rotational force of the press machine P causes the reciprocating moving body 34 to reciprocate due to the displacement of the cam surfaces 32f and 32b of the side cam 32. be able to.
[0027]
Next, the material feed amount adjusting mechanism 5 includes a swing shaft 42 inserted into the shaft hole 41a of the swing lever 41 between the feed base 12 and the reciprocating body 34 shown in FIG. The bearing cylinder 43 attached to the front side plate 2H shown in FIG. 3 and the bearing cylinder 44 attached to the rear side plate 2J are rotatably supported. In the swing lever 41, a shaft hole 41a having a width through which the swing shaft 42 can be inserted is formed in an elongated hole shape having a width through which the swing shaft 42 can be inserted. Are provided with yoke-like arm portions 41b and 41c projecting at axially symmetrical positions on the long hole axis of the shaft hole 41a.
[0028]
Further, grooves 41d and 41d and grooves 41e and 41e are formed on both ends of the swing lever 41 on the long hole axis of the shaft hole 41a, respectively, and an adjustment bolt is provided on the inner side continuous with the grooves 41e and 41e. Grooves 41f and 41f having a width through which the 45 small-diameter portions 45a and 45b can be inserted are formed. On the swing shaft 42, a female screw 42 a that can be screwed with the male thread portion 45 c of the adjustment bolt 45 is threaded on the center line of the grooves 41 f and 41 f of the swing lever 41 orthogonal to the axis. The movement of the adjustment bolt 45 in the left-right direction shown in FIG. 2 is restricted by a step between the head and the male screw portion 45c.
[0029]
Further, a primary side link 46 is supported on one arm portion 41b of the swing lever 41 so as to be swingable by a swing pin 47, and the other end of the primary side link 46 is connected to the reciprocating body 34 shown in FIG. It is connected to the lower right. A secondary side link 48 is swingably supported by a swing pin 49 on the other arm portion 41 c, and the other end of the secondary side link 48 is connected to the left end portion of the feed base 12.
[0030]
The swing lever 41 on the swing shaft 42 is provided so that it cannot be moved in the axial direction by the sliding rings 51 and 52 on both ends. The protrusion 51a of one slide ring 51 is formed to be slidable with the grooves 41d and 41d of the swing lever 41, and the protrusion 52a of the other slide ring 52 is slidable with the grooves 41e and 41e of the swing lever 41. Is formed. In this sliding ring 52, fastening bolts 53, 53 can be inserted in the parallel position shown in FIG. 3, and long holes 52b, 52b parallel to the long axis of the shaft hole 41a of the swing lever 41 are formed. The ring 52 is fastened to the swing lever 41 by fastening bolts 53 and 53.
[0031]
Therefore, the swing lever 41 transmits the power from the reciprocating body 34 of the feed base drive mechanism 4 to the feed base 12 of the material clamping mechanism 3 and loosens the fastening bolts 53 and 53. By rotating the adjustment bolt 45, the lever ratio between the primary side and the secondary side of the swing lever 41 is adjusted by moving the adjustment bolt 45 along the long hole axis of the shaft hole 41a with respect to the swing shaft 42. be able to.
[0032]
That is, in FIG. 7, the lever ratio of the swing lever 41 is the lever ratio Ra in FIG. 7A = secondary lever length Ca / primary side lever length Ba, and the lever ratio Rb in FIG. 7B = secondary. It is possible to adjust the amount of forward / backward movement of the material clamping mechanism 3 by adjusting between the side lever length Cb / primary side lever length Bb.
[0033]
Next, the pressing plate raising mechanism 6 has a cam shaft 29 shown in FIGS. 1 and 4 and an outer peripheral cam 55 having an undulating cam surface 55a formed on the outer periphery thereof. A cam follower 56 attached to the lower end of 57 is circumscribed in a rotatable manner and is provided so as to be vertically movable. Two guide pins 58, 58 protrude from the upper surface of the lower end overhanging portion and are fixed to the vertical moving body 57. The protruding portions of the guide pins 58, 58 are inserted into the guide holes of the horizontal plate 2D so as to be vertically movable, and guide the vertically movable body 57.
[0034]
Further, a cam follower 59 is attached to the upper end portion of the vertical moving body 57 so as to be in contact with the lower surface of the lower connecting plate 17 of the material clamping mechanism 3 and to be rotatable. Therefore, when the undulating cam surface 55a of the outer peripheral cam 55 that circumscribes the cam follower 56 is changed from the small diameter portion to the large diameter portion, the cam follower 59, the lower connecting plate 17, the guide posts 16, 16, The pressing plate 21 that presses the material M on the feeding table 13 downward by the coil springs 24 and 24 via the connecting plate 18 is lifted against the pressing force of the coil springs 24 and 24 to hold the material. The mechanism 3 can be released from the clamping state.
[0035]
Next, as shown in FIGS. 1 and 5, the material restraining mechanism 7 is located closer to the press machine P than the material clamping mechanism 3 on the guide shafts 11, 11, and the restraining base 62 is disposed on the front plate 2 </ b> H of the frame 2. And the rear plate 2J. On the upper surface of the suppression base 62, a suppression base 63 formed on the upper surface so that the material M can be placed is integrally attached. In addition, two guide posts 66, 66 are inserted in parallel on the right and left sides of the restraining base 62 shown in FIG. 5 so as to be movable in the vertical direction. The plate 68 is connected.
[0036]
On the lower surface of the upper connecting plate 68, a depressing pressing plate 71 formed so as to be able to press the material M placed on the suppressing stand 63 is integrally attached, and the upper connecting portions on both the left and right sides sandwiching the suppressing pressing plate 71 are attached. Spring plates 72, 72 are inserted through the plate 68, and the lower ends thereof are attached to the suppression base 62. Coil springs 74, 74 are interposed between the spring stoppers 73, 73 and the upper connecting plate 68, which are respectively attached to the upper ends of the spring shafts 72, 72. The depressing pressing plate 71 urges the material M on the deterring base 63 so as to be always pressed downward.
[0037]
The cam shaft 29 shown in FIGS. 1 and 5 is mounted with an outer peripheral cam 75 having an undulating cam surface 75 a formed on the outer periphery thereof, and is attached to the lower surface of the lower connecting plate 67 on the upper portion of the outer peripheral cam 75. A cam follower 76 attached to the lower end portion of the up-and-down moving body 77 is provided so as to be able to move up and down in a circumscribed manner.
[0038]
Therefore, when the undulating cam surface 75a of the outer peripheral cam 75 that circumscribes the cam follower 76 is changed from the small diameter portion to the large diameter portion, the lower connecting plate 67, the guide columns 66 and 66, and the upper connecting plate 68 are moved by the upward and downward moving body 77. The restraining pressing plate 71 that presses the material M on the restraining table 63 downward by the coil springs 74 and 74 is raised against the pressing force of the coil springs 74 and 74, and the material restraining mechanism 7 is It can be released from the pinched state.
[0039]
Subsequently, the operation of each part during one cycle of press working will be described as follows. The swing lever ratio is adjusted in advance according to the feed amount of the material M.
That is, by rotating the adjustment bolt 45 shown in FIGS. 2 and 6 to shift the position of the swing lever 41 with respect to the swing shaft 42, the lever ratio of the swing lever 41 is changed as shown in FIG. Lever ratio Ra = secondary lever length Ca / primary side lever length Ba and lever ratio Rb = secondary lever length Cb / primary side lever length Bb in FIG. The feed amount can be adjusted.
[0040]
For example, in FIG. 7A, if each cam rise of the side cam 32 is 5 mm, the movement amount A of the primary side link 46 is 5 mm. Further, the distance between the swing pin 47 and the swing pin 49 connected to the swing lever 41 is 76 mm, and the swing lever 41 is moved from the intermediate position of 76 mm to the primary link 46 side with respect to the swing shaft 42. When the lever ratio Ra = secondary lever length Ca / primary side lever length Ba = 30/46 = 0.65, the amount of movement Sa = A × Ra = 5 × 0.65 = 3.25 mm.
[0041]
On the other hand, in FIG. 7B, each cam rise of the side cam 32 is always constant, so that the movement amount A of the primary side link 46 is 5 mm. Further, with respect to the swing shaft 42, the swing lever 41 is adjusted from the intermediate position of 76 mm to the secondary link 48 side by an adjustment amount γb = 8 mm (total adjustment amount γa + γb = 8 + 8 = from the position of FIG. 7A). 16 mm) and the lever ratio Rb = secondary lever length Cb / primary side lever length Bb = 46/30 = 1.53, the movement amount Sb = A × Rb = 5 × 1. 53 = 7.65 mm.
[0042]
That is, if the feed amount of the material M is between 3.25 and 7.65 mm, the feed amount of the material M can be adjusted without replacing the side cam 32. In this example, the swing lever 41 is displaced by a total adjustment amount γa + γb = 16 mm with respect to the swing shaft 42. However, since the swing shaft 42 is not eccentric as in the prior art, the swing lever 41 is There is no interference with the standing plate 2F or the standing plate 2G.
[0043]
Immediately before the last press processing of the material M by the press machine P, the material clamping mechanism 3 waits in the retracted position on the left side shown in FIG. 1 while the material M is released by the ascent of the pressing plate 21 shown in FIG. The material deterrence mechanism 7 stands by in a state where the material M is deterred by the depressing pressing plate 71 shown in FIG. When the cam shaft 29 is rotated from this state, the undulating cam surface 55a of the outer peripheral cam 55 that circumscribes the cam follower 56 turns from the large diameter portion to the small diameter portion, and the material M is fed by the lowering of the pressing plate 21. 13 is pressed and held.
[0044]
Immediately thereafter, the undulating cam surface 75a of the outer peripheral cam 75 circumscribing the cam follower 76 turns from the small diameter portion to the large diameter portion and releases the material M from the deterred state by the ascent of the depressing press plate 71. Next, the cam surfaces 32f and 32b of the side cam 32 are shifted from the rightward retracted position shown in FIG. 1 to the left, so that the cam followers 36 and 36, the hanging body 35, the reciprocating body 34, and the primary side link 46 are moved. Then, the swing lever 41 is swung clockwise, and the feeding base 12 is further moved to the right from the retracted position on the left side shown in FIG.
[0045]
As the feed base 12 advances, the material M is fed to the processing portion of the press machine P by a set feed amount while being sandwiched between the feed base 13 and the pressing plate 21. The feed amount of the material M is set by the cam rises of the cam surfaces 32 f and 32 b of the side cam 32 and the lever ratio of the swing lever 41. Of these, the cam rises of the side cams 32 are always constant, so the feed amount cannot be adjusted.
[0046]
Next, when the material M is fed to the processing portion of the press machine P by the set feed amount, the undulating cam surface 75a of the outer peripheral cam 75 turns from the large diameter portion to the small diameter portion, and the restraining press plate 71 descends. The material M is pressed against the restraining table 63 and restrained from the released state. Immediately thereafter, the undulating cam surface 55a of the outer peripheral cam 55 turns from the small diameter portion to the large diameter portion, and the material M is released from the sandwiched state by the upward movement of the pressing plate 21.
[0047]
Next, the cam surfaces 32f and 32b of the side cam 32 are shifted from the left-side advance position to the right-hand side shown in FIG. 1, so that the cam followers 36 and 36, the hanging body 35, the reciprocating body 34, and the primary side link 46 are moved. The swing lever 41 is swung counterclockwise, and the feed base 12 is moved backward from the rightward advance position via the secondary side link 48 to the left as shown in FIG. Let During the above, the pressing process to the material M is a feeding base that is waiting at the retracted end position immediately after the material M fed to the processing part of the press machine P is suppressed by the set feed amount. This is done until 12 starts moving forward. This completes one cycle of press working.
[0048]
Subsequently, Example 2 will be described as follows with reference to FIG. FIG. 8 is different from FIG. 2 of the first embodiment in that only the swinging pin for connecting the primary side link 46 and the secondary side link 48 to the swinging lever 41 is different. Therefore, the same reference numerals as those in FIG.
[0049]
The swing pin 47A for connecting the primary side link 46 to the arm portion 41b of the swing lever 41 is the same as the large-diameter shaft portion 47a and the small-diameter shaft portion 47c that are supported on the arm portion 41b so that the rotational position can be adjusted. An eccentric shaft portion 47b that supports the primary side link 46 so as to be swingable is eccentric with respect to this axial center by an eccentric amount γc. The swing pin 49A that connects the secondary side link 48 to the other arm portion 41c is the same as the large diameter shaft portion 49a and the small diameter shaft portion 49c that are supported by the arm portion 41c so that the rotational position can be adjusted. An eccentric shaft portion 49b that supports the secondary side link 48 so as to be able to swing is eccentric with respect to this axial center by an eccentric amount γd.
[0050]
Then, as shown in FIG. 8, the eccentric shaft portion 47b of the swing pin 47A is decentered by an eccentric amount γc so as to approach the swing shaft 42, and the eccentric shaft portion 49b of the swing pin 49A is moved away from the swing shaft 42. Is eccentric by an eccentric amount γd, the lever ratio Rb = secondary lever length Cb / primary side lever length Bb in FIG. The secondary lever length (Cb + γd) / primary lever length (Bb−γc). Therefore, the feed ratio of the material can be adjusted in a wider range by using a larger lever ratio than in the first embodiment.
[0051]
Subsequently, Example 3 will be described as follows. The third embodiment is applied to a material feed amount adjusting mechanism according to the prior art, and the configuration of the swing pin is the same as that of FIG. . For example, by replacing the swing pin 147 shown in FIG. 10 with the swing pin 47A or the swing pin 149 with the swing pin 49A, a lever that is larger than the material feed amount adjustment mechanism using the eccentric shaft of the prior art. In comparison, the material feed rate can be adjusted over a wider range.
[0052]
The material feed amount adjusting mechanism of the press machine according to the present invention is not limited to the above-described embodiment, and can be configured in various forms without departing from the gist of the present invention.
[0053]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
[0054]
According to the first aspect of the present invention, the shaft hole of the swing lever is formed with an elongated hole on the axis of both arms, and the swing lever is screwed with the female screw of the swing shaft so as to be rotatable. A bolt is provided, and the lever is moved along the elongated hole with respect to the rocking shaft by this adjusting bolt, thereby adjusting the lever ratio between the primary side and the secondary side of the rocking lever and feeding the material. Since the amount is adjusted, even if the amount of movement of the rocking lever relative to the rocking shaft is increased, the rocking lever does not interfere with other components. There is no need to replace the cams. As a result, it is possible to easily cope with multi-product processing and to save labor for setup time.
[0055]
According to the second aspect of the present invention, at least one swing of the primary swing pin that connects the primary link to the swing lever or the secondary swing pin that connects the secondary link. The moving pin eccentrically adjusts the position of the swing pin by decentering the eccentric shaft portion supporting the primary side link or the secondary side link with respect to the journal portion pivotally fixed to the arm portion of the swing lever. Thus, since the material feed amount is adjusted by adjusting the lever ratio between the primary side and the secondary side of the swing lever, the material feed amount can be adjusted in a wider range.
[0056]
Next, according to the third aspect of the present invention, at least one swing of the swing pin on the primary side that connects the primary side link to the swing lever or the swing pin on the secondary side that connects the secondary side link. The moving pin is eccentric with the eccentric shaft portion supporting the primary side link or the secondary side link with respect to the journal portion fixed to the arm portion of the rocking lever, and the rotation position of the rocking pin is adjusted. As a result, the material feed amount is adjusted by adjusting the lever ratio between the primary side and the secondary side of the swing lever. Therefore, the swing pin is different from the conventional material feed amount adjustment mechanism using the eccentric shaft. The material feed rate can be adjusted over a wider range simply by replacing it with one that is eccentric.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a gripper feed device incorporating a material feed amount adjusting mechanism according to the present invention, and is a longitudinal sectional view thereof.
2 is a cross-sectional view taken along the line AA in FIG.
3 is a cross-sectional view taken along arrow BB in FIG.
4 is a cross-sectional view taken along the line CC in FIG.
5 is a cross-sectional view taken along the line DD in FIG.
6 is an enlarged view of the material feed amount adjusting mechanism portion of FIG. 1 as well. FIG.
FIG. 7 is also an explanatory view showing a lever ratio of the material feed amount adjusting mechanism.
8 is a cross-sectional view taken along arrow AA of FIG. 1 according to the second embodiment.
FIG. 9 is an explanatory view showing a gripper feed device incorporating a material feed amount adjusting mechanism according to a conventional technique, and is a longitudinal sectional view thereof.
FIG. 10 is also an explanatory view showing a lever ratio of the material feed amount adjusting mechanism.
[Explanation of symbols]
1 Gripper feed device
3 Material clamping mechanism
4 Feeding table drive mechanism
5 Material feed adjustment mechanism
6 Pressing plate lifting mechanism
7 Material deterrence mechanism
12 Feeding base
13 Feeding table
21 Press plate
29 Camshaft
32 Side cam
41 Swing lever
41a Shaft hole
42 Oscillating shaft
45 Adjustment bolt
46 Primary link
48 Secondary link
55 Perimeter cam
63 Deterrence stand
71 Depressing pressure plate
A Travel distance (primary side)
M material
P press machine
Ra, Rb Lever ratio
Sa, Sb Travel distance (secondary side)
γa, γb Adjustment amount

Claims

It is a material feed amount adjustment mechanism of a gripper feed device that sandwiches a long plate-like material and intermittently feeds it sequentially to a processing part of a press machine,
The material is placed on the feeding table by a feeding table that can be placed on the upper surface and can be moved back and forth in the feeding direction, and a coil spring that is movably moved up and down on the feeding table and biases downward. A pressing plate that can be pressed between the upper surface of the sheet and a feeding table driving means that moves the feeding table together with the pressing plate at the feeding time of the material and moves backward at the stopping time, and the feeding plate. An oscillating shaft that is rotatably supported between the feeding base driving means and the feeding base, and an arm portion projecting at an axially symmetric position of the trunk portion, and the oscillating shaft is inserted into the trunk portion. A swing lever formed with a shaft hole, a primary link that is connected to one arm of the swing lever and the feed base driving means and swings the swing lever, and the other of the swing lever A secondary link that is connected to the arm and the feed table and moves the feed table forward and backward, and when the material stops A pressing plate raising means for raising the pressing plate against the urging force of the coil spring to release the material from the sandwiched state; and when the feeding base and the pressing plate move backward by releasing the material Comprising a material restraining means capable of restraining the material to constitute a gripper feed device;
The shaft hole of the swing lever is formed with an elongated hole on the axis of both arms that can adjust the insertion position of the swing shaft, and the swing shaft of the portion inserted into the body of the swing lever has An orthogonal female screw is threaded, and an adjustment bolt that can be rotated by being screwed to the female screw of the rocking shaft is provided on the body of the rocking lever. By moving the rocking lever along the elongated hole, the lever ratio between the primary side and the secondary side of the rocking lever is adjusted, and the feed amount of the material is adjusted. Material feed amount adjustment mechanism for press machines.

A swing pin on the primary side that pivotably connects one arm portion of the swing lever and the primary link, or the other arm portion of the swing lever and the secondary link swings. At least one swing pin of the swing pin on the secondary side that can be connected is connected to the primary link or the journal portion that is pivotally fixed to the arm portion of the swing lever so that the rotational position can be adjusted. Adjusting the lever ratio between the primary side and secondary side of the rocking lever by adjusting the pivot position of the rocking pin by decentering the eccentric shaft that supports the secondary side link so as to be rockable 2. A material feed amount adjusting mechanism for a press machine according to claim 1, wherein the material feed amount is adjusted.

It is a material feed amount adjustment mechanism of a gripper feed device that sandwiches a long plate-like material and intermittently feeds it sequentially to a processing part of a press machine,
The material is placed on the feeding table by a feeding table that can be placed on the upper surface and can be moved back and forth in the feeding direction, and a coil spring that is movably moved up and down on the feeding table and biases downward. A pressing plate that can be pressed between the upper surface of the sheet and a feeding table driving means that moves the feeding table together with the pressing plate at the feeding time of the material and moves backward at the stopping time, and the feeding plate. An eccentric shaft in which an eccentric fixing portion is continuously provided with respect to a journal portion that is rotatably supported between a feeding base driving means and the feeding base, and an arm portion projects at an axially symmetrical position of the trunk portion. The swinging lever is formed with a shaft hole in which the fastening portion of the eccentric shaft is inserted, and one swinging arm part of the swinging lever and the feeding base driving means are connected to the swinging lever. The feed base connected to the primary side link for swinging the lever, the other arm of the swing lever, and the feed base A secondary link that moves forward and backward, a pressing plate lifting means that lifts the pressing plate against the biasing force of the coil spring at the time of stopping the material, and releases the material from the sandwiched state; and the feeding base And a material restraining means capable of restraining the material when the pressing plate retreats by releasing the material, and constitutes a gripper feed device,
A swing pin on the primary side that pivotably connects one arm portion of the swing lever and the primary link, or the other arm portion of the swing lever and the secondary link swings. At least one swing pin of the swing pin on the secondary side that can be connected is connected to the primary link or the journal portion that is pivotally fixed to the arm portion of the swing lever so that the rotational position can be adjusted. Adjusting the lever ratio between the primary side and secondary side of the rocking lever by adjusting the pivot position of the rocking pin by decentering the eccentric shaft that supports the secondary side link so as to be rockable A material feed amount adjusting mechanism for a press machine, wherein the material feed amount is adjusted.