JP3640236B2

JP3640236B2 - Intermediate transfer device

Info

Publication number: JP3640236B2
Application number: JP15219798A
Authority: JP
Inventors: 小野豊; 阿部賢
Original assignee: Aida Engineering Ltd
Current assignee: Aida Engineering Ltd
Priority date: 1998-05-15
Filing date: 1998-05-15
Publication date: 2005-04-20
Anticipated expiration: 2018-05-15
Also published as: JPH11319997A

Description

【０００１】
【発明の属する技術分野】
本発明は、一定長さに切断されて受け台上に静止する板材を、板材の長さにかかわらず搬送装置への受け渡し位置と板材の移送方向の長さの中心とを常に合致するように、板材を移送する中間移送装置に関するものである。
【０００２】
【従来の技術】
材料供給装置と切断装置及び搬送装置とプレス機械とで構成されるプレスラインにあって、材料供給装置から送給されるコイル材を切断装置により一定長さに切断された板材を、ロボット等の搬送装置で吸着して次工程に供給する時、板材の長さに応じて、搬送装置への所定の受け渡し位置と板材の移送方向の長さの中心とを合致する（以下、センタリングと言う。）ことは、搬送装置の位置制御機能の簡素化のために中間移送装置の必須機能である。
【０００３】
【発明が解決しようとする課題】
切断された板材を、所定の受け渡し位置にセンタリングするに当たり、その幅方向は切断装置でセンタリングされて繰り出されるので不要であるが、長さ方向は常に変動するため、作業者が板材の長さ、板材の中心位置、掴み位置から受け渡し地点までの移動量等を算出し、それに応じてアクチュエータの移動量や各種センサの位置を調節しなければならず、煩雑な段取り作業を必要としている。
また、上述の作業を自動化させるには、各種のアクチュエータの移動量を規制するための位置決め機構や演算用の電気機器が必要となり、装置が複雑となり、高価なものとなる。
【０００４】
本発明の目的は、簡単な構造及び操作で、一定長さに切断された板材を、所定の位置にセンタリングすることの出来る中間移送装置を提供することにある。
【０００５】
【課題を解決するための手段】
上述の課題を解決するために、本発明は、一定長さに切断された板材をプレス機械に供給する中間移送装置において、移送用シリンダを長手方向に位置調整可能に設け、移送用シリンダのピストンロッドにブラケットを固定し、ブラケットに把持具を設け、ブラケットのストッパとしての第２移動体を移送用シリンダと同じ方向に位置調整可能に設け、第２移動体の位置調整量と移送用シリンダの位置調整量の比が２対１になるように位置調整手段を設け、把持具は受け台上の板材を把持して移送用シリンダによって一定量移動する構造とする。
【０００６】
上述の中間移送装置において、位置調整手段は、移送用シリンダが固設されている第１移動体にねじ込まれた第１調整ねじ、第２移動体にねじ込まれた第２調整ねじと、両調整ねじを回転させる構造とする。
【０００７】
また、上述の中間移送装置において、把持具に板材の存在を検出する第１センサを、移送用シリンダにピストンロッドの進退を検出する第２センサを、第２移動体にブラケットの進退を検出する第３センサをそれぞれ設ける。
【０００８】
【発明の実施の形態】
図１から図３に、本発明の中間移送装置の実施例を示す。図１は、本発明における中間移送装置の要部の構成図を示す。
図１に示すように、中間移送装置１は、例えば図示しない材料供給装置と切断装置及び搬送装置とプレス機械とで構成されるプレスラインにあって、材料供給装置から送給されるコイル材を切断装置の切断刃４により所要の一定長さＬに切断された板材５を、中間移送装置１に設けた架台２上方の受け台３上に静止する。
【０００９】
架台２の右側面側には、搬送装置への受け渡し位置と板材５の移送方向の長さＬの中心とを合致させる（以下、センタリングと言う。）ために移送する板材５の長さＬを設定するハンドル９と、ハンドル９により設定した板材５の長さＬを表示するインジケータ２７が設けられている。
このインジケータ２７に嵌合するとともに、一端部をハンドル９と連結して他端部を架台２に回転自在に駆動軸１０が支持され、この駆動軸１０には２列の同一歯部を設けた第１タイミングプーリ８（８Ａ、８Ｂ）が嵌合されている。
また、架台２には、板材５の移送方向に沿って、同一ねじピッチの第１調整ねじ６と第２調整ねじ７が回転自在に支持されている。
第１調整ねじ６の軸端部には、第１タイミングプーリ８Ａと２対１の回転比率で第１タイミングベルト２８を介して係合する第２タイミングプーリ１１が設けられ、第２調整ねじ７の軸端部には、第１タイミングプーリ８Ｂと同一回転比率で第２タイミングベルト２９を介して係合する第３タイミングプーリ１２が設けられている。
【００１０】
ブラケット１７は、基台部材３３と脚部材３２とで形成され、脚部材３２を移送用シリンダ１４のピストンロッド１５の先端部に連結し、基台部材３３に静止部材３４を立設する。
このブラケット１７の基台部材３３に固設する把持具１６は、フィンガ１９と把持用シリンダ１８とで構成する。
フィンガ１９は、中央部をブラケット１７の基台部材３３上の静止部材３４と支点ピン３６で揺動自在に連結する。
フィンガ１９の後端部は、この支点ピン３６を支点してブラケット１７の基台部材３３に立設する把持用シリンダ１８のピストンロッド１８Ａの先端部と連結して、フィンガ１９の先端の把持部３５で搬送装置への受け渡し位置まで板材５を移送するために受け台３上の板材５の先端部を把持／開放する。
なお、ブラケット１７の基台部材３３上には基台２０が設けられ、この基台２０上に設けた第１センサ２１により、受け台３上の板材５の有無を検出する。
【００１１】
第１調整ねじ６には、下方を第１ガイドロッド３０に軸方向に摺動自在に案内される第１移動体１３が螺合する。
この第１移動体１３上には、把持具１６を固設するブラケット１７の脚部材３２をピストンロッド１５の先端部に連結して、受け台３上の静止位置から搬送装置への受け渡し位置まで把持具１６に把持された板材５を移送する移送用シリンダ１４が設けられている。
移送用シリンダ１４のヘッド側には第２センサ２４が設けられ、板材５の搬送装置への受け渡し位置とセンタリングする移送用シリンダ１４のピストンロッド１５の出限位置を検出する。
【００１２】
また、第２調整ねじ７には、下方を第２ガイドロッド３１に軸方向に摺動自在に案内される第２移動体２２が螺合する。
この第２移動体２２には第３センサ２５が設けられ、受け台３上の板材５の長さＬに対応して、板材５の先端部からの常に一定した把持具１６の板材５の把持位置を検出する。
なお、第２移動体２２にはストッパ２３が設けられ、把持具１６が板材５の把持位置を検出する際のブラケット１７の脚部材３２と第２移動体２２との当接時の衝撃を緩衝する。
【００１３】
図２は、上述の中間移送装置に適用された空圧回路図を示す。
図１及び図２に示すように、あらかじめハンドル９によりインジケータ２７に設定された板材５の長さＬに対応して、第２移動体２２に設けた第３センサ２５で検出する位置で、把持具１６がフィンガ１９を開放して待機する状態において、図示しない材料供給装置から所要の長さＬのコイル材が送給される。
所要の長さＬのコイル材の先端部が受け台３上に静止して第１センサ２１が板材５の確認を検出すると、電磁弁４５を切り換えて把持具１６の把持用シリンダ１８の下室１８Ｂにエア源４１の圧力エアを所要の圧力に調整する減圧弁４２を介して圧力エアを供給するとともに、上室１８Ｃの圧力エアを排気して、把持具１６のフィンガ１９の把持部３５がコイル材の先端部を把持する。
フィンガ１９の把持部３５がコイル材の先端部を把持すると、電磁弁４５を切り換え信号を受けた図示しない切断装置に設けたタイマにより、コイル材が切断刃４により所要の一定長さＬに切断される。
【００１４】
コイル材が切断刃４により所要の一定長さＬに切断されると、あらかじめ設定した切断装置の切断刃４の位置信号を受けて、電磁弁４４を切り換えて移送用シリンダ１４の下室１８Ａに圧力エアを供給するとともに、上室１８Ｂの圧力エアを排気して、基台部材３３上に把持具１６を設けたブラケット１７の脚部材３２と連結した移送用シリンダ１４のピストンロッド１５をピストン２６が第２センサ２４で検出するまでの移送ストロークＳを移送して、板材５を図示しない搬送装置への受け渡し位置とセンタリングする。
【００１５】
板材５が搬送装置への受け渡し位置とセンタリングされて静止すると、第２センサ２４の検出信号を受けて、電磁弁４５を切り換えて把持具１６の把持用シリンダ１８の上室１８Ｃに圧力エアを供給するとともに、下室１８Ｂの圧力エアを排気して、把持具１６のフィンガ１９の把持部３５が板材５から開放される。
この電磁弁４５の切り換え信号を受けて、中間移送装置１と図示しないプレス機械との間にあって図示しない搬送装置、例えば搬送ロボットのアームが受け渡し位置側に移動して板材５を吸着し、把持具１６のフィンガ１９に干渉しないように板材５を上昇しながら、あらかじめ設定したクランク角度で停止するプレス機械の加工ステージへと板材５を搬送する。
【００１６】
板材５がプレス機械の加工ステージに搬送されると、搬送ロボットのアームは、図示しないプレス機械のスライド及びスライドに取り付けた上型と干渉しない位置まで後退して、待機する。
この状態で、プレス機械の加工ステージに搬送された板材５はプレス加工される
。
【００１７】
プレス運転信号、もしくは搬送ロボットのアームの待機位置検出信号を受けて、電磁弁４４を切り換えて移送用シリンダ１４の上室１４Ｂに圧力エアを供給するとともに、下室１４Ａの圧力エアを排気して、基台部材３３上に把持具１６を設けたブラケット１７の脚部材３２と連結した移送用シリンダ１４のピストンロッド１５は、第２移動体２２に設けた第３センサ２５がブラケット１７の脚部材３２を検出する位置、すなわち、把持具１６の待機位置まで移送ストロークＳを後退して、材料供給装置によりコイル材が送給されるまで待機する。
【００１８】
この行程を繰り返して、板材５は、順次プレス機械の加工ステージに搬送され、プレス加工される。
【００１９】
なお、移送用シリンダ１４の下室１４Ａ及び上室１４Ｂと把持用シリンダ１８の下室１８Ｂ及び上室１８Ｃのそれぞれ空圧管路には、速度制御弁４６、４６が設けられ、電磁弁４４、４５の切り換え時に生じるピストン作動の衝撃を緩衝している。
また、保守点検や板材５の移送異常時に、移送用シリンダ１４と把持用シリンダ及びその管路の圧力エアを排気するために、管路には手動切換弁４３が設けられている。
【００２０】
切断装置の切断刃（４）の位置から移送される板材５の搬送装置への受け渡し位置の配置は、板材５の最大仕様の長さＬにより設定される。
つまり、搬送装置への受け渡し位置に移送された最大仕様の長さＬの板材５が、切断装置のフレーム並びに把持具（１６）のフィンガ（１９）やプレス機械に干渉せずにプレス機械の加工ステージに搬送されるように、プレスラインの全長を抑えるために出来るだけ短く設定される。
【００２１】
図３は、長さの異なる板材の移送状態図を示す。
図３に示すように、搬送装置への受け渡し位置Ｐにおいて、受け渡し位置Ｐと移送された板材５Ａの移送方向の長さＬ１の中心位置Ｏ１とは合致するので、受け渡し位置Ｐに対してＬ１／２ずつの長さで振り分けて配置される。
同様に、移送される板材５Ａの長さＬ１がＦだけ変更されると、受け渡し位置Ｐと移送された板材５Ｂの移送方向の長さＬ１の中心位置Ｏ２とは合致するので、受け渡し位置Ｐに対して板材５Ａの時よりもＦ／２だけ長いＬ２／２ずつの長さで振り分けて配置される。
移送される板材５Ａの長さＬ１がＦだけ変更されると、板材５Ｂの移送方向の長さＬ２の中心位置は、板材５Ａの中心位置Ｏ１からＦ／２だけ変動したＯ２となる。
つまり、把持具（１６）は長さＦだけ変動した位置で待機するように、また移送ストロークＳを設定する移送用シリンダ１４に設けた第２センサ２４の位置は、変動長さＦの１／２に配設するように設定すればよい。
【００２２】
上述により設定された切断刃４の位置と搬送装置への受け渡し位置Ｐの配置を基準として、移送される板材５の長さＬにかかわらず、板材５を搬送装置への受け渡し位置Ｐにセンタリングするには、板材５の長さＬに対応して把持具１６の待機位置を設定する第３センサ（２５）及び第２移動体（２２）と、板材５の長さＬに対応して受け渡し位置Ｐまでの板材５の移送ストロークＳを設定する移送用シリンダ（１４）を設けた第１移動体（１３）との送り量比率は、２対１と設定すればよいことになる。
【００２３】
従って、上述の実施例で明らかなように、第１調整ねじ６の軸端部に設けた第２タイミングプーリ１１と第２調整ねじ７の軸端部に設けた第３タイミングプーリ１２との回転比率を２対１とすることで、第１調整ねじ６に螺合する第１移動体１３と第２調整ねじ７に螺合する第２移動体２２とが１対２の送り量比率で同軸方向に移動すると、移送する板材５の長さＬをハンドル９でインジケータ２７に設定するだけで、切断装置の切断刃４により所要の長さに切断されて受け台３上に静止する板材５の長さＬにかかわらず、搬送装置への受け渡し位置に移送される板材５のセンタリングが容易に出来る。
【００２４】
本実施例においては、駆動軸１０から第１調整ねじ６及び第２調整ねじ７への伝達部材をタイミングプーリ８、１１、１２及びタイミングベルト２８、２９としたが、スプロケットとチェーンやピニオンとギヤに置き換えてもよい。
また、同一回転比率の伝達部材として第１調整ねじ６と第２調整ねじ７とのリード比率を１対２とすることにより、第１移動体と第２移動体とが１対２の送り量比率で同軸方向に移動するように構成してもよい。
【００２５】
さらには、本実施例においては、第１タイミングプーリ８に２列の同一歯部を設けて、第１調整ねじ６の軸端部に設けた第２タイミングプーリ１１と第２調整ねじ７の軸端部に設けた第３タイミングプーリ１２とにタイミングベルト２８、２９で係合して伝達部材を構成したが、第１タイミングプーリ（８）の歯部を１列として、第３タイミングプーリ１２を介さず、この第１タイミングプーリ（８Ａ）を設けた駆動軸（１０）と第２調整ねじ７の軸端部とを直接連結して、第１調整ねじ６の軸端部に設けた第２タイミングプーリ１１とをタイミングベルト２８で係合して伝達部材を構成してもよい。
なお、タイミングプーリ８、１１、１２とタイミングベルト２８、２９以外の伝達部材を用いて構成する場合も、同様である。
【００２６】
【発明の効果】
以上の説明から明らかなように、本発明によれば、簡単な構造及び操作で、切断装置により所要の一定長さに切断される板材の長さにかかわらず、搬送装置への受け渡し位置に移送される板材のセンタリングが容易に出来る。
【図面の簡単な説明】
【図１】本発明の実施例における中間搬送装置の要部構成図
【図２】同じく、本実施例に適用された空圧回路図
【図３】同じく、長さの異なる板材の移送状態図
【符号の説明】
１は中間移送装置、２は架台、３は受け台、４は切断刃、５は板材、６は第１調整ねじ、７は第２調整ねじ、８、８Ａ、８Ｂは第１タイミングプーリ、９はハンドル、１０は駆動軸、１１は第２タイミングプーリ、１２は第３タイミングプーリ、１３は第１移動体、１４は移送用シリンダ、１４Ａは下室、１４Ｂは上室、１５はピストンロッド、１６は把持具、１７はブラケット、１８は把持用シリンダ、１８Ａはピストンロッド、１９はフィンガ、２０は基台、２１は第１センサ、２２は第２移動体、２３はストッパ、２４は第２センサ、２５は第３センサ、２６はピストン、２７はインジケータ，２８は第１タイミングベルト、２９は第２タイミングベルト、３０は第１ガイドロッド、３１は第２ガイドロッド、３２は脚部材、３３は基台部材、３４は静止部材、３５は把持部、３６は支点ピン、４１は空気供給源、４２は減圧弁、４３は手動切換弁、４４、４５は電磁弁、４６は速度制御弁、である。[0001]
BACKGROUND OF THE INVENTION
In the present invention, a plate material cut to a certain length and resting on a cradle is always aligned with the delivery position to the transport device and the center of the length in the plate material transfer direction regardless of the length of the plate material. The present invention relates to an intermediate transfer device for transferring a plate material.
[0002]
[Prior art]
In a press line composed of a material supply device, a cutting device, a conveying device, and a press machine, a plate material obtained by cutting a coil material fed from the material supply device into a certain length by a cutting device, such as a robot When adsorbed by the transport device and supplied to the next process, the predetermined delivery position to the transport device and the center of the length in the transport direction of the plate material coincide with each other according to the length of the plate material (hereinafter referred to as centering). This is an essential function of the intermediate transfer device in order to simplify the position control function of the transfer device.
[0003]
[Problems to be solved by the invention]
When centering the cut plate material to a predetermined delivery position, the width direction is centered by the cutting device and is fed out, which is unnecessary, but since the length direction always fluctuates, the operator can change the length of the plate material, The amount of movement of the plate material from the center position, the gripping position to the delivery point, and the like must be calculated, and the amount of movement of the actuator and the position of various sensors must be adjusted accordingly, which requires complicated setup work.
Further, in order to automate the above-described work, a positioning mechanism for restricting the movement amount of various actuators and an electric device for calculation are required, and the apparatus becomes complicated and expensive.
[0004]
An object of the present invention is to provide an intermediate transfer device capable of centering a plate material cut into a predetermined length at a predetermined position with a simple structure and operation.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides an intermediate transfer device for supplying a plate material cut to a predetermined length to a press machine, wherein a transfer cylinder is provided so that the position of the transfer cylinder can be adjusted in the longitudinal direction. The bracket is fixed to the rod, the holding tool is provided on the bracket, the second moving body as a bracket stopper is provided so that the position of the second moving body can be adjusted in the same direction as the transfer cylinder, the position adjustment amount of the second moving body and the transfer cylinder Position adjustment means is provided so that the ratio of the position adjustment amount is 2: 1, and the gripping tool is configured to grip the plate material on the cradle and move by a fixed amount by the transfer cylinder.
[0006]
In the above intermediate transfer device, the position adjusting means includes a first adjustment screw screwed into the first moving body on which the transfer cylinder is fixed, a second adjustment screw screwed into the second moving body, and both adjustments. A structure that rotates the screw.
[0007]
In the above-described intermediate transfer device, the first sensor that detects the presence of the plate material in the gripper, the second sensor that detects the advance / retreat of the piston rod in the transfer cylinder, and the advance / retreat of the bracket in the second moving body are detected. A third sensor is provided.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
1 to 3 show an embodiment of the intermediate transfer device of the present invention. FIG. 1 is a configuration diagram of a main part of an intermediate transfer device according to the present invention.
As shown in FIG. 1, the intermediate transfer device 1 is in a press line composed of, for example, a material supply device, a cutting device, a conveyance device, and a press machine (not shown), and a coil material fed from the material supply device is used. The plate material 5 cut to the required fixed length L by the cutting blade 4 of the cutting device is rested on the cradle 3 above the gantry 2 provided in the intermediate transfer device 1.
[0009]
On the right side surface side of the gantry 2, the length L of the plate 5 to be transferred in order to make the delivery position to the conveying device coincide with the center of the length L in the transfer direction of the plate 5 (hereinafter referred to as centering). A handle 9 to be set and an indicator 27 for displaying the length L of the plate 5 set by the handle 9 are provided.
The drive shaft 10 is fitted to the indicator 27, one end portion is connected to the handle 9, and the other end portion is rotatably supported by the mount 2. The drive shaft 10 is provided with two rows of identical teeth. The first timing pulley 8 (8A, 8B) is fitted.
Further, the first adjusting screw 6 and the second adjusting screw 7 having the same screw pitch are rotatably supported on the gantry 2 along the transfer direction of the plate material 5.
The shaft end portion of the first adjustment screw 6 is provided with a second timing pulley 11 that engages with the first timing pulley 8A through the first timing belt 28 at a rotation ratio of 2: 1. A third timing pulley 12 that is engaged via a second timing belt 29 at the same rotation ratio as that of the first timing pulley 8B is provided at the shaft end of the shaft.
[0010]
The bracket 17 is formed by a base member 33 and a leg member 32, and the leg member 32 is connected to the tip end portion of the piston rod 15 of the transfer cylinder 14, and a stationary member 34 is erected on the base member 33.
The gripping tool 16 fixed to the base member 33 of the bracket 17 includes a finger 19 and a gripping cylinder 18.
The finger 19 is pivotally connected at its center by a stationary member 34 on the base member 33 of the bracket 17 and a fulcrum pin 36.
The rear end portion of the finger 19 is connected to the distal end portion of the piston rod 18A of the gripping cylinder 18 standing on the base member 33 of the bracket 17 with the fulcrum pin 36 as a fulcrum. In order to transfer the plate material 5 to the delivery position to the transfer device at 35, the front end portion of the plate material 5 on the cradle 3 is gripped / released.
A base 20 is provided on the base member 33 of the bracket 17, and the presence or absence of the plate material 5 on the cradle 3 is detected by a first sensor 21 provided on the base 20.
[0011]
A first moving body 13, which is guided downward in the axial direction by the first guide rod 30, is screwed into the first adjustment screw 6.
On the first moving body 13, the leg member 32 of the bracket 17 for fixing the gripping tool 16 is connected to the tip of the piston rod 15, and from the rest position on the cradle 3 to the delivery position to the transport device. A transfer cylinder 14 for transferring the plate material 5 held by the holding tool 16 is provided.
A second sensor 24 is provided on the head side of the transfer cylinder 14 to detect the delivery position of the plate 5 to the conveying device and the limit position of the piston rod 15 of the transfer cylinder 14 to be centered.
[0012]
The second adjustment screw 7 is screwed with a second moving body 22 that is guided downward in the axial direction by the second guide rod 31.
The second moving body 22 is provided with a third sensor 25, which grips the plate material 5 of the gripping tool 16 that is always constant from the tip of the plate material 5 corresponding to the length L of the plate material 5 on the cradle 3. Detect position.
The second moving body 22 is provided with a stopper 23 to buffer an impact when the leg member 32 of the bracket 17 contacts the second moving body 22 when the gripping tool 16 detects the gripping position of the plate material 5. To do.
[0013]
FIG. 2 shows a pneumatic circuit diagram applied to the intermediate transfer device described above.
As shown in FIGS. 1 and 2, the gripping is performed at the position detected by the third sensor 25 provided on the second moving body 22 corresponding to the length L of the plate member 5 set in advance on the indicator 27 by the handle 9. In a state where the tool 16 opens the finger 19 and stands by, a coil material having a required length L is fed from a material supply device (not shown).
When the tip of the coil material having a required length L rests on the cradle 3 and the first sensor 21 detects the confirmation of the plate material 5, the electromagnetic valve 45 is switched to lower the lower chamber of the gripping cylinder 18 of the gripping tool 16. 18B is supplied with the pressure air via the pressure reducing valve 42 for adjusting the pressure air of the air source 41 to a required pressure, and the pressure air in the upper chamber 18C is exhausted, so that the grip portion 35 of the finger 19 of the gripper 16 is Hold the tip of the coil material.
When the gripping portion 35 of the finger 19 grips the tip end portion of the coil material, the coil material is cut to the required fixed length L by the cutting blade 4 by a timer provided in a cutting device (not shown) that receives the switching signal of the electromagnetic valve 45. Is done.
[0014]
When the coil material is cut to the required fixed length L by the cutting blade 4, the position signal of the cutting blade 4 of the cutting device set in advance is received and the electromagnetic valve 44 is switched to the lower chamber 18A of the transfer cylinder 14. While supplying the pressure air, the pressure air in the upper chamber 18B is exhausted, and the piston rod 15 of the transfer cylinder 14 connected to the leg member 32 of the bracket 17 having the grip 16 on the base member 33 is connected to the piston 26. Until the second sensor 24 detects the transfer stroke S, the plate 5 is centered with a delivery position to a transfer device (not shown).
[0015]
When the plate 5 is centered with the delivery position to the transfer device and is stationary, the detection signal of the second sensor 24 is received, the electromagnetic valve 45 is switched, and the pressure air is supplied to the upper chamber 18C of the gripping cylinder 18 of the gripping tool 16. At the same time, the pressure air in the lower chamber 18 </ b> B is exhausted, and the gripping portion 35 of the finger 19 of the gripping tool 16 is released from the plate material 5.
In response to the switching signal of the electromagnetic valve 45, a transfer device (not shown) between the intermediate transfer device 1 and a press machine (not shown), for example, an arm of a transfer robot moves to the delivery position side to adsorb the plate material 5, The plate material 5 is transported to a processing stage of a press machine that stops at a preset crank angle while raising the plate material 5 so as not to interfere with the 16 fingers 19.
[0016]
When the plate 5 is transferred to the processing stage of the press machine, the arm of the transfer robot moves back to a position where it does not interfere with the slide of the press machine (not shown) and the upper mold attached to the slide, and waits.
In this state, the plate 5 conveyed to the processing stage of the press machine is pressed.
[0017]
In response to the press operation signal or the standby position detection signal of the arm of the transfer robot, the solenoid valve 44 is switched to supply pressure air to the upper chamber 14B of the transfer cylinder 14 and exhaust the pressure air in the lower chamber 14A. The piston rod 15 of the transfer cylinder 14 connected to the leg member 32 of the bracket 17 provided with the gripping tool 16 on the base member 33 is connected to the leg member of the bracket 17 by the third sensor 25 provided on the second moving body 22. The transfer stroke S is retracted to the position where 32 is detected, i.e., the standby position of the gripping tool 16, and the coil material is fed by the material supply device.
[0018]
By repeating this process, the plate 5 is sequentially conveyed to the processing stage of the press machine and pressed.
[0019]
In addition, speed control valves 46 and 46 are provided in the pneumatic lines of the lower chamber 14A and the upper chamber 14B of the transfer cylinder 14 and the lower chamber 18B and the upper chamber 18C of the holding cylinder 18, respectively, and electromagnetic valves 44 and 45 are provided. The shock of the piston operation that occurs when switching between is buffered.
Further, a manual switching valve 43 is provided in the pipe line in order to exhaust the pressure air in the transfer cylinder 14 and the gripping cylinder and the pipe line at the time of maintenance inspection or abnormal transfer of the plate material 5.
[0020]
The arrangement of the delivery position of the plate material 5 transferred from the position of the cutting blade (4) of the cutting device to the conveying device is set by the length L of the maximum specification of the plate material 5.
In other words, the plate material 5 having the maximum specification length L transferred to the delivery position to the transfer device is processed by the press machine without interfering with the frame of the cutting device, the finger (19) of the gripping tool (16), and the press machine. In order to reduce the overall length of the press line, it is set as short as possible so as to be conveyed to the stage.
[0021]
FIG. 3 shows a transfer state diagram of plate members having different lengths.
As shown in FIG. 3, at the delivery position P to the transport device, the delivery position P and the center position O1 of the length L1 of the transported plate 5A in the transport direction coincide with each other. They are arranged with a length of 2 each.
Similarly, when the length L1 of the transferred plate material 5A is changed by F, the delivery position P and the center position O2 of the length L1 in the transfer direction of the transferred plate material 5B coincide with each other. On the other hand, they are distributed and arranged at a length of L2 / 2 which is F / 2 longer than that of the plate 5A.
When the length L1 of the plate material 5A to be transferred is changed by F, the center position of the length L2 in the transfer direction of the plate material 5B becomes O2 changed by F / 2 from the center position O1 of the plate material 5A.
That is, the position of the second sensor 24 provided on the transfer cylinder 14 for setting the transfer stroke S is set to 1 / of the change length F so that the gripping tool (16) stands by at a position changed by the length F. 2 may be set.
[0022]
Based on the position of the cutting blade 4 set as described above and the arrangement of the delivery position P to the transfer device, the plate material 5 is centered at the transfer position P to the transfer device regardless of the length L of the transferred plate material 5. The third sensor (25) and the second moving body (22) for setting the standby position of the gripping tool 16 corresponding to the length L of the plate material 5, and the delivery position corresponding to the length L of the plate material 5 The feed rate ratio to the first moving body (13) provided with the transfer cylinder (14) for setting the transfer stroke S of the plate material 5 up to P may be set to 2: 1.
[0023]
Therefore, as is clear from the above-described embodiment, the rotation of the second timing pulley 11 provided at the shaft end portion of the first adjustment screw 6 and the third timing pulley 12 provided at the shaft end portion of the second adjustment screw 7. By setting the ratio to 2: 1, the first moving body 13 screwed to the first adjusting screw 6 and the second moving body 22 screwed to the second adjusting screw 7 are coaxial at a feed ratio of 1: 2. When the plate 5 is moved in the direction, the length L of the plate 5 to be transferred is simply set to the indicator 27 by the handle 9, and the plate 5 is cut to a required length by the cutting blade 4 of the cutting device and rests on the cradle 3. Regardless of the length L, it is possible to easily center the plate material 5 transferred to the delivery position to the transport device.
[0024]
In this embodiment, the transmission members from the drive shaft 10 to the first adjustment screw 6 and the second adjustment screw 7 are the timing pulleys 8, 11, 12 and the timing belts 28, 29. However, the sprocket and the chain, the pinion and the gear are used. May be replaced.
In addition, by setting the lead ratio of the first adjustment screw 6 and the second adjustment screw 7 as 1: 2 as a transmission member having the same rotation ratio, the first moving body and the second moving body have a feed amount of 1: 2. You may comprise so that it may move to a coaxial direction by a ratio.
[0025]
Furthermore, in this embodiment, the first timing pulley 8 is provided with two rows of identical teeth, and the shafts of the second timing pulley 11 and the second adjustment screw 7 provided at the shaft end of the first adjustment screw 6 are provided. The transmission member is configured by engaging with the third timing pulley 12 provided at the end by the timing belts 28 and 29, but the third timing pulley 12 is arranged with the teeth of the first timing pulley (8) in one row. Without being interposed, the drive shaft (10) provided with the first timing pulley (8A) and the shaft end of the second adjustment screw 7 are directly connected to each other, and a second provided at the shaft end of the first adjustment screw 6 is provided. The transmission member may be configured by engaging the timing pulley 11 with the timing belt 28.
The same applies to the case where the transmission members other than the timing pulleys 8, 11 and 12 and the timing belts 28 and 29 are used.
[0026]
【The invention's effect】
As is apparent from the above description, according to the present invention, with a simple structure and operation, regardless of the length of the plate material to be cut to a required fixed length by the cutting device, it is transferred to the delivery position to the conveying device. This makes it easy to center the plate material.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a main part of an intermediate transfer device according to an embodiment of the present invention. FIG. 2 is a pneumatic circuit diagram similarly applied to the present embodiment. FIG. [Explanation of symbols]
1 is an intermediate transfer device, 2 is a frame, 3 is a cradle, 4 is a cutting blade, 5 is a plate, 6 is a first adjustment screw, 7 is a second adjustment screw, 8, 8A and 8B are first timing pulleys, 9 Is a handle, 10 is a drive shaft, 11 is a second timing pulley, 12 is a third timing pulley, 13 is a first moving body, 14 is a transfer cylinder, 14A is a lower chamber, 14B is an upper chamber, 15 is a piston rod, 16 is a gripping tool, 17 is a bracket, 18 is a gripping cylinder, 18A is a piston rod, 19 is a finger, 20 is a base, 21 is a first sensor, 22 is a second moving body, 23 is a stopper, and 24 is a second. Sensor, 25 is a third sensor, 26 is a piston, 27 is an indicator, 28 is a first timing belt, 29 is a second timing belt, 30 is a first guide rod, 31 is a second guide rod, 32 is a leg member, 33 Is the base Members, 34 stationary member, 35 is the grip portion, the fulcrum pins 36, 41 supply air, 42 pressure reducing valve 43 is manual switching valve, 44 and 45 the solenoid valve 46 is a speed control valve is.

Claims

In the intermediate transfer device for supplying the plate material (5) cut to a certain length to the press machine, the transfer cylinder (14) is provided so as to be adjustable in the longitudinal direction, and the piston rod (15) of the transfer cylinder (14) is provided. ) brackets (17) fixed to the grasper to the bracket (17) provided (16), said transfer cylinder and the second moving member as the stopper bracket (17) (22) and (14) Position adjustment means is provided so that the position adjustment is possible in the same direction, and a position adjustment means is provided so that the ratio of the position adjustment amount of the second moving body (22) and the position adjustment amount of the transfer cylinder (14) is 2: 1. The intermediate transfer device characterized in that the gripping tool (16) is structured to grip the plate (5) on the cradle (3) and move by a certain amount by the transfer cylinder (14).

The position adjusting means is screwed into the first adjusting screw (6) screwed into the first moving body (13) to which the transfer cylinder (14) is fixed and the second moving body (22). The intermediate transfer device according to claim 1, characterized in that the second adjusting screw (7) and the two adjusting screws are rotated.

A first sensor (21) that detects the presence of the plate (5) in the gripping tool (16), and a second sensor (24) that detects the advance and retreat of the piston rod (15) in the transfer cylinder (14). The intermediate transfer device according to claim 2, wherein a third sensor (25) for detecting advance and retreat of the bracket (17) is provided on the second moving body (22).