JP2004082296A

JP2004082296A - Sucking device and molding taking-out device

Info

Publication number: JP2004082296A
Application number: JP2002248335A
Authority: JP
Inventors: Yoshiyuki Uchida; 内田　善幸; Eiji Takei; 武井　英治
Original assignee: Star Seiki Co Ltd
Current assignee: Star Seiki Co Ltd
Priority date: 2002-08-28
Filing date: 2002-08-28
Publication date: 2004-03-18
Anticipated expiration: 2022-08-28
Also published as: JP4046179B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sucking device and a molding taking-out device capable of reducing the cost for sucking a work by reducing the consumption of a compressed air by cutting and controlling the supply of the compressed air to a negative pressure generator in a case when the non-sucking state of the work by the sucking member is continued for more than a predetermined time. <P>SOLUTION: This sucking device is composed of a compressed air supply source, the negative pressure generating device generating the negative pressure by the supplied compressed air, and a member for sucking and holding the work by the negative pressure. The sucking device comprises a compressed air switching member for opening and closing a compressed air channel, and a control means mounted on the piping between the negative pressure generating device and the sucking member, keeping an opening state of the compressed air switching member by detecting the suction of the work by the sucking member in a case when the negative pressure detected by the negative pressure detecting member is more than a predetermined value, and cutting the supply of the compressed air to the negative pressure generating device by closing the compressed air switching member in a case where the negative pressure of less than the predetermined value is continued for more than a predetermined time. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明が属する技術分野】
本発明は、ワークを所定の位置へ移動したりする際に該ワークを吸着保持する吸着装置及び該吸着装置を備えた成型品取出機に関する。
【０００２】
【発明が解決しようとする課題】
例えば樹脂成形機により成形されたワークとしての成型品を樹脂成形機外の所定位置に取り出す成型品取出機にあっては、チャックユニットに設けられた吸着部材により成型品を吸着保持した状態でチャックユニットを二次元方向または三次元方向へ移動制御して成型品を取り出している。
【０００３】
そしてチャックユニットの吸着部材を負圧にして成型品を吸着させる吸着装置には、例えば供給される圧縮空気を通過させる際にベルヌーイの法則に基づいて負圧を発生させる負圧発生装置を採用している。従来の吸着装置にあっては、例えば成型品取出機の保守点検作業の場合や成型品の移動途中に成型品が落下してチャックの移動を非常停止させた場合等のように長時間にわたる成型品の非吸着状態が見込まれる場合であっても、負圧発生装置に対する圧縮空気の供給を継続して負圧発生状態を保っている。
【０００４】
このように負圧発生状態を継続するには、負圧発生装置に対する圧縮空気の供給、従って圧縮空気を発生させるためのエアーコンプレッサーの運転を継続する必要があるが、成型品の非吸着状態が継続している、従って負圧を発生させる必要がない場合であっても、電動モータを駆動してエアーコンプレッサーの運転を継続しなければならず、電力消費の観点から無駄であった。
【０００５】
この欠点は、吸着部材による成型品の非吸着状態が長く継続することが見込まれる事態においては、作業者はエアーコンプレッサーから負圧発生装置に至る配管に設けられたバルブを閉操作して圧縮空気の消費、従ってエアーコンプレッサーの運転を抑制することにより回避できるが、その際には、作業者がバルブを閉操作する必要があり、作業に手間がかかっていた。
【０００６】
上記した圧縮空気により負圧を発生させる方法以外にも、例えばロータリーポンプ等の排気ポンプにより排気して真空形成し、該真空圧によりワークを真空吸着する吸着装置が存在するが、この場合にあっても、ワークの非吸着状態が長時間にわたって継続する場合で、作業者が真空発生装置と吸着部材の真空開閉部材を閉鎖しない場合には、吸着部材自体、大気と連通して低真空状態になるため、真空発生装置の運転が継続されることになり、該真空発生装置を運転するための消費電力が増大する問題を有している。
【０００７】
本発明は、上記した従来の欠点を解決するために発明されたものであり、その課題とする処は、吸着部材によるワークの非吸着状態が所定時間以上継続する場合には負圧発生装置に対する圧縮空気の供給を遮断制御して圧縮空気の消費量を低減してワークの吸着コストを低減することができる吸着装置及び成型品取出機を提供することにある。
【０００８】
本発明の他の課題は、作業者の手間を省いてワークの吸着コストを確実に低減することができる吸着装置及び成型品取出機を提供することにある。
【０００９】
【課題を解決するための手段】
本発明の請求項１は、所定圧力の圧縮空気を供給する圧縮空気供給源と、供給される圧縮空気により負圧を発生させる負圧発生装置と、ワークを負圧により吸着保持する吸着部材とを配管にて接続した吸着装置において、圧縮空気供給源及び負圧発生装置間の配管に設けられ、圧縮空気流路を開閉する圧縮空気開閉部材と、負圧発生装置及び吸着部材間の配管に設けられ、該配管内の負圧を検出する負圧検出部材と、負圧検出部材により検出される負圧が所定値以上の場合には、吸着部材にワークが吸着されたことを検出して圧縮空気開閉部材の開状態を維持制御する一方、負圧検出部材により検出される所定値以下の負圧が予め設定された時間以上継続する場合には、圧縮空気開閉部材を閉作動制御して負圧発生装置に対する圧縮空気の供給を遮断する制御手段を備えたことを特徴とする。
【００１０】
請求項２は、空気を排気して真空形成する真空発生源と、ワークを真空吸着する吸着部材とを配管にて接続した吸着装置において、真空発生源側の配管に設けられ、真空流路を開閉する開閉部材と、吸着部材側の配管に設けられ、該配管内の真空圧を検出する真空圧検出部材と、真空圧検出部材により検出される真空圧が所定値以上の場合には、吸着部材にワークが吸着されたことを検出して開閉部材の開状態を維持制御する一方、真空圧検出部材により検出される所定値以下の真空圧が予め設定された時間以上継続する場合には、開閉部材を閉作動制御して吸着部材の真空形成を遮断する制御手段を備えたことを特徴とする。
【００１１】
請求項５は、成型品を吸着して保持するチャックを移動制御して樹脂成形機から成型品を所定の解放位置に取り出す成型品取出機において、チャックに設けられる吸着部材と、所定圧力の圧縮空気を供給する圧縮空気供給源と、供給される圧縮空気により負圧を発生させる負圧発生装置とを配管にて接続すると共に圧縮空気供給源及び負圧発生装置間の配管に設けられ、圧縮空気流路を開閉する圧縮空気開閉部材と、負圧発生装置及び吸着部材間の配管に設けられ、該配管内の負圧を検出する負圧検出部材と、負圧検出部材により検出される負圧が所定値以上の場合には、吸着部材にワークが吸着されたことを検出して圧縮空気開閉部材の開状態を維持制御する一方、負圧検出部材により検出される所定値以下の負圧が予め設定された時間以上継続する場合には、圧縮空気開閉部材を閉作動制御して負圧発生装置に対する圧縮空気の供給を遮断する制御手段とからなる負圧吸着手段を設けたことを特徴とする。
【００１２】
請求項６は、成型品を真空吸着して保持するチャックを移動制御して樹脂成形機から成型品を所定の解放位置に取り出す成型品取出機において、チャックに設けられる吸着部材と、空気を排気して真空形成する真空発生源とを配管にて接続すると共に真空発生源側の配管に設けられ、真空流路を開閉する開閉部材と、吸着部材側の配管に設けられ、該配管内の真空圧を検出する真空圧検出部材と、真空圧検出部材により検出される真空圧が所定値以上の場合には、吸着部材にワークが吸着されたことを検出して開閉部材の開状態を維持制御する一方、真空圧検出部材により検出される所定値以下の真空圧が予め設定された時間以上継続する場合には、開閉部材を閉作動制御して吸着部材の真空形成を遮断する制御手段とからなる真空吸着手段を備えたことを特徴とする。
【００１３】
【発明の実施形態】
以下、本発明の吸着装置を備えた成型品取出機の実施形態に従って説明する。
実施形態１
先ず、本発明の吸着装置が採用される成型品取出機１の概略を説明すると、図１及び図２において、樹脂成形機の固定側取付盤３の上部には成型品取出機１の本体フレーム５の基部が固定される。該本体フレーム５は樹脂成形機の中心軸線（長手方向）と直交する方向で、金型上方と樹脂成形機外の操作側または反操作側へ延びる長さからなり、左右走行体７が軸線直交方向へ往復移動可能に支持される。
【００１４】
該左右走行体７には軸線方向へ延びる前後フレーム９が設けられ、前後フレーム９には前後走行体１１が軸線方向へ往復移動可能に支持される。前後走行体１１には昇降フレーム１３が上下方向へ移動可能に支持され、該昇降フレーム１３の下部には成型品を吸着する複数の吸着部材１５が設けられたチャック１７が取り付けられる。
【００１５】
本体フレーム５に対して左右走行体７、前後フレーム９に対して前後走行体１１及び前後走行体１１に対して昇降フレーム１３は、例えばサーボモータ等の電動モータ１９・２１・２３を駆動制御して往復移動される。電動モータ１９・２１・２３を使用した往復駆動機構としては、電動モータに連結されて回転する送りねじにナットを噛み合わせた送りねじ駆動機構、所定の長さからなる有端ベルトに電動モータの回転軸に設けられた歯付き回転体を噛み合わせた有端ベルト駆動機構、一方に電動モータが連結された一対の回転体に張設される無端ベルトの一部を可動部に固定した無端ベルト駆動機構の何れであってもよい。また、電動モータ１９・２１・２３自体を固定子と可動子から構成したリニアモータであってもよい。
【００１６】
上記した左右走行体７には負圧調整器２５、圧縮空気開閉弁２７、負圧発生装置２９、吸着圧検出器３１、噴射空気圧調整器３３、噴射空気開閉弁３５が設けられる。
【００１７】
その内、負圧調整器２５はダイヤフラム、吸気用電磁弁及び排気用電磁弁等で、入力される電気信号に比例して空気圧を無段階に制御可能な構造からなり、成型品取出機１に接続された圧縮空気配管から供給される、例えば空気圧：５ｋｇ／ｃｍ^２の圧縮空気を所望の圧力に可変調整する。
【００１８】
尚、該負圧調整器２５は、本発明を構成するものではなく、これを設けずに圧縮空気配管から供給される圧縮空気を直接、負圧発生装置２９に供給してもよい。また、上記した負圧調整器２５は、電気信号に基づいて制御する構成としたが、作業者が手作業により開閉度を調整する手動調整構造であってもよい。
【００１９】
圧縮空気開閉弁２７は負圧調整器２５と負圧発生装置２９を接続する配管に設けられる電磁ソレノイドバルブにより構成され、負圧発生装置２９に対して圧縮空気を供給したり、遮断したりする。
【００２０】
負圧発生装置２９は供給された圧縮空気が通過する際に、ベルヌーイの法則に基づいて負圧を発生させる構造からなる。該負圧発生装置２９により発生する負圧（吸着圧）は負圧調整器２５により可変された圧縮空気圧に応じて調整される。
【００２１】
吸着圧検出器３１は、負圧発生装置２９と吸着部材１５を接続する配管途中に設けられ、例えばダイヤグラムに、ピエゾ素子やバイモルフ素子等の圧電素子としての歪みゲージを設けた構成で、負圧変化に伴う歪みゲージの変形量に対応する電気信号を出力する。
【００２２】
尚、負圧調整器２５の前段側と吸着圧検出器３１の後段側には噴射用配管が分岐接続され、該噴射用配管には噴射空気圧調整器３３及び噴射空気開閉弁３５が直列に設けられる。そして噴射空気圧調整器３３は負圧調整器２５と同様な構造で、供給される圧縮空気圧を、吸着部材１５による成型品の吸着を解除する際に噴射される圧縮空気圧を所望の圧力に可変制御する。また、噴射空気開閉弁３５は電磁ソレノイドバルブ等により構成され、吸着部材１５に対して圧力調整された圧縮空気を供給したり、遮断したりする。
【００２３】
図４において、制御手段４１の中央演算処理装置（ＣＰＵ）４３はプログラムメモリ４５、作業メモリ４７及びタイマ４９を備えている。プログラムメモリ４５は成型品取出機１が成型品取出し動作を実行するためのプログラムデータ、成型品を吸着したり、所定条件において吸引を禁止するための吸引プログラムデータ等の各種プログラムデータを記憶する。タイマ４９は後述するように負圧発生装置２９に対する圧縮空気の供給を遮断させる際の所定時間を計時する。
【００２４】
作業メモリ４７は成型品取出し動作を実行するためのチャック１７を移動制御する各種位置データを記憶する位置記憶領域４７ａ、成型品の材質の硬柔、大きさや形状、重量等に応じて設定される最適吸着圧データを記憶する吸着圧領域４７ｂ、吸着部材１５による成型品の非吸着状態が継続する際に負圧発生を禁止するために設定される禁止時間データを記憶する禁止時間領域４７ｃ等を有している。
【００２５】
上記した禁止時間領域４７ｃに記憶される禁止時間データとしては、少なくとも成型品の取出しサイクル（時間）以上で、任意に設定される。
【００２６】
ＣＰＵ４３には設定装置５１及び吸着圧検出器３１がインターフェース５３を介して接続される。設定装置５１はチャック１７の各移動位置に関する位置データを設定入力するテンキーや実行キー等の位置設定手段５１ａ、各種成型品に応じた最適吸着圧データを設定入力するための吸着圧設定手段５１ｂ、成型品の非吸着状態が継続する際に負圧発生を禁止する禁止時間データを設定するための禁止時間設定手段５１ｃ、上記した各データの設定モードに切換えるモード切換手段５１ｄ及び各モードにおいて入力されるデータを表示するＬＣＤ等の表示部材５１ｅ等を有している。
【００２７】
上記した位置設定手段５１ａ、吸着圧設定手段５１ｂ及び禁止時間設定手段５１ｃは、実質的には共通のテンキー及び実行キー等により構成し、モード切換手段５１ｄにより夫々のモードを切換えて各種データを入力するようにすればよい。また、吸着圧検出器３１は吸着部材１５における負圧に応じた電気信号をＣＰＵ４３に出力する。
【００２８】
ＣＰＵ４３にはバルブ駆動制御回路５５が接続され、該バルブ駆動制御回路５５には負圧調整器２５、圧縮空気開閉弁２７等が接続される。
【００２９】
バルブ駆動制御回路５５は吸着圧領域４７ｂに記憶された吸着圧データに基づいて負圧調整器２５を作動制御して負圧発生装置２９に供給される圧縮空気圧を変更調整させる。
【００３０】
バルブ駆動制御回路５５は、通常は圧縮空気開閉弁２７を開動作させて負圧調整器２５により圧力調整された圧縮空気を負圧発生装置２９へ供給して吸着部材１５に負圧を発生させる一方、吸着部材１５による成型品の非吸着状態が禁止時間領域４７ｃに記憶された所定時間の間、継続した際には、圧縮空気開閉弁２７を閉動作して負圧発生装置２９に対する圧縮空気の供給を遮断させる。
【００３１】
尚、ＣＰＵ４３にはチャック１７を左右方向、前後方向及び上下方向へ夫々移動させる電動モータ１９、２１及び２３の各サーボドライバー回路（図示せず）が接続され、位置記憶領域４７ａに記憶された各位置データに基づいてチャック１７を夫々の位置へ移動させるように駆動制御させる。
【００３２】
次に、吸着部材１５による成型品の吸着作用及び負圧発生禁止作用を説明する。
【００３３】
先ず、成型品の吸着処理について説明すると、例えば負圧調整器２５の一次側に供給される圧縮空気圧が５ｋｇ／ｃｍ^２の場合に、負圧発生装置２９の最大発生負圧：−６０ｋｐｓとすると、作業者は成型品の種類（硬柔、大きさ、重量、形状等）に応じて吸着部材１５による最適吸着圧を上記した−６０ｋｐｓ以内、例えば−４０ｋｐｓに設定して吸着圧領域４７ｂに記憶させる。
【００３４】
これによりバルブ駆動制御回路５５は吸着圧領域４７ｂに記憶された最適負圧データに基づいて負圧調整器２５を作動制御して負圧発生装置２９により発生する負圧が−４０ｋｐｓになるように圧縮空気圧を調整する。
【００３５】
そして樹脂成形機の金型間と、樹脂成形機の操作側（反操作側）との間でチャック１７を左右方向、前後方向及び上下方向へ夫々移動制御し、チャック１７の吸着部材１５に成型品を吸着保持させて取出し動作を実行させる。
【００３６】
その際、ＣＰＵ４３は吸着圧検出器３１により検出される吸着部材１５の負圧により吸着部材１５が成型品を吸着保持しているか否かを判断する。即ち、吸着部材１５が成型品を吸着保持している場合には吸着圧検出器３１により検出される負圧が−４０ｋｐｓに近くなり、反対に吸着部材１５が成型品を吸着保持していない場合には、吸着部材１５が大気に連通しているため、吸着圧検出器３１により検出される負圧が、例えば−１０ｋｐｓ以下になる。これにより吸着圧検出器３１により検出される吸着部材１５の負圧に基づいて吸着部材１５に成型品が吸着保持されているか否かを判断する。
【００３７】
尚、所定の開放位置で吸着部材１５に吸着保持された成型品を開放する際には、バルブ駆動制御回路５５は噴射空気開閉弁を開作動して噴射空気圧調整器３３により圧力調整された圧縮空気を吸着部材１５から噴射して成型品の吸着状態を強制的に解除させる。
【００３８】
上記した成型品の取出し動作時に、吸着部材１５から成型品が落下して取出し不良やチャック１７の動作を停止して保守点検を行う際には、以下のように負圧の発生を禁止処理させる。
【００３９】
即ち、図５に示すようにステップ６１により圧縮空気開閉弁２７が開作動して負圧発生装置２９に圧縮空気が供給されて吸着部材１５が負圧形成されているか否かを判断し、該ステップ６１がＮＯのとき、ステップ６２により圧縮空気開閉弁２７を開作動して負圧発生装置２９に圧縮空気を供給することにより吸着部材１５を負圧形成してステップ６１に戻る。
【００４０】
一方、負圧発生装置２９に圧縮空気が供給されて圧縮空気開閉弁２７の開度に応じた流量の圧縮空気に対応する負圧が発生してステップ６１がＹＥＳのとき、吸着部材１５による成型品の吸着保持が可能になる。
【００４１】
この状態でステップ６３において吸着圧検出器３１により検出される吸着部材１５の負圧が予め設定された−４０ｋｐｓの最適吸着圧付近に達しているか否かにより吸着部材１５が成型品を吸着保持しているか否かを判断する。
【００４２】
吸着圧検出器３１により検出される負圧が所定負圧以上になっているとき、吸着部材１５が成型品を吸着保持していると判断してステップ６１に戻る。
【００４３】
反対に、吸着圧検出器３１により検出される負圧が設定された最適負圧より低い場合には、上記ステップ６３がＮＯになり、次にステップ６４によりタイマ４９を起動して計時を開始させた後、ステップ６５により計測される時間が予め禁止時間領域４７ｃに記憶された所定の禁止時間に達したか否かを判断する。
【００４４】
今、タイマ４９により計測される時間が禁止時間に達せず、ステップ６４がＮＯのとき、ステップ６１に戻る。通常、成型品取出し動作が継続的に実行されている場合には、上記した所定時間以内に吸着部材１５が成型品を再び吸着保持することによりステップ６３の判定がＹＥＳまたはステップ６５の判定がＮＯになり、負圧発生装置２９に対して圧縮空気を継続的に供給して負圧発生状態を維持させる。このため、禁止時間は、少なくとも成型品の取出しサイクル（時間）以上に設定すればよい。
【００４５】
一方、例えば成型品取出し途中において吸着部材１５による吸着不良等により成型品が落下してチャック１７の移動を非常停止させた場合や保守点検作業によりチャック１７の移動を完全に停止させる場合には、タイマ４９により計測される時間が禁止時間以上になってステップ６５の判定がＹＥＳになる。
【００４６】
この場合にあっては、ステップ６６により圧縮空気開閉弁２７を閉動作制御して負圧発生装置２９に対する圧縮空気の供給を中断させる。これにより長時間にわたって成型品を吸着保持することが見込まれない状態においては、負圧発生装置２９に対する圧縮空気の供給を中断して負圧発生を規制することにより、圧縮空気の消費、従って圧縮空気を発生させるエアーコンプレッサーの運転を停止させる。
【００４７】
次に、ステップ６７において作業者が手動により吸着部材１５による成型品保持を解除する操作や成型品取出しの自動運転時に成型品保持解除動作を行うため、圧縮空気開閉弁２７を開作動させる指示信号が入力されたか否かを判断し、指示信号が入力された場合には成型品の吸着動作を実行するためにステップ６１に戻る。反対に、指示信号が入力されず、吸着部材１５による成型品の非吸着状態が継続している場合にはステップ６７に戻り、指示信号が入力されるまで負圧発生装置２９に対する圧縮空気の供給を中断させる。
【００４８】
実施形態２
実施形態１の吸着装置は、負圧発生装置２９に圧縮空気を供給して吸着部材１５に負圧を発生させる吸着装置に付いて説明したが、実施形態２は各吸着部材１５を真空形成して成型品を真空吸着する吸着装置に係る。
【００４９】
図６において、ロータリーポンプ等により排気して所定真空圧を発生する真空発生装置７１の排気管７３にはチャック１７に設けられた各吸着部材１５が接続され、排気管７３の真空発生装置７１側には真空開閉部材７５が設けられている。また、排気管７３の吸着部材１５側には真空圧検出部材７７が設けられ、吸着部材１５側における排気管７３内の真空圧に応じた電気信号を出力する。上記した真空発生装置７１は、常に所定の真空圧になるように排気ポンプを間欠駆動するように構成される。
【００５０】
真空開閉部材７５は電磁ソレノイドバルブにより構成され、入力される開閉信号により排気管７３を開閉している。更に、真空圧検出部材７７は歪みゲージ等からなり、排気管７３における吸着部材１５側の真空圧に応じた電気信号を出力する。
【００５１】
成型品取出機１の構成については、実施形態１と同様であるため、必要に応じて同一号を付して詳細な説明を省略する。
【００５２】
そして通常は、真空開閉部材７７を開作動して吸着部材１５を真空形成して成型品を真空吸着させる。このとき、吸着部材１５に成型品が真空吸着されている際には吸着部材１５の吸引口が成型品により塞がれて大気と非連通になっているため、真空圧検出部材７９により検出される排気管７３内が所定の真空圧以上の高真空状態になることに基づいて成型品の吸着保持を検出可能にさせる。
【００５３】
そして成型品の取出し途中に吸着部材１５から成型品が落下してチャック１７の移動を非常停止させた場合や、チャック１７の移動を停止して成型品取出機１を保守点検する際には、吸着部材１５には成型品が吸着されていずに大気と連通しているため、排気管７３内が低真空状態になる。これにより吸着部材１５による成型品の非吸着状態を検出する。
【００５４】
そして吸着部材１５による成型品の非吸着状態が禁止時間領域４７ｃに記憶された禁止時間以上継続する場合には、真空開閉部材７５を閉動作制御して真空発生装置７１の排気管７３が吸着部材１５を介して大気と連通するのを規制して所定の真空状態に保つ。これにより真空発生装置７１を排気駆動し続ける必要がなく、そのための電力消費を低減することができる。
【００５５】
上記実施形態の成型品取出機は、吸着装置に接続される吸着部材が設けられるチャック１７を左右方向、前後方向及び上下方向の三次元方向へ移動制御して成型品を取出す構造としたが、成型品取出機としてはこれに限定されるものではなく、チャックを二次元方向、旋回移動させる形式であればよい。
【００５６】
また、実施形態２においては、真空発生装置は、常に所定の真空圧を発生するように排気ポンプを間欠的に駆動制御する構成としたが、実施形態１と同様に真空開閉部材７５の前段に、電気的または手動で調整可能な真空圧調整器を設け、該真空圧調整器により設定された所定の真空圧になるように真空発生装置の排気ポンプを間欠的に駆動する構成であってもよい。
【００５７】
【発明の効果】
本発明は、吸着部材によるワークの非吸着状態が所定時間以上継続する場合には負圧発生装置に対する圧縮空気の供給を遮断制御して圧縮空気の消費量を低減してワークの吸着コストを低減することができる。また、作業者の手間を省いてワークの吸着コストを確実に低減することができる。
【図面の簡単な説明】
【図１】本発明の吸着装置が採用される成型品取出機の概略を示す全体斜視図である。
【図２】左右走行体の背面側を示す略体斜視図である。
【図３】吸着系を示す説明図である。
【図４】吸着系の制御概略を示す電気的ブロック図である。
【図５】負圧発生禁止処理を示すフローチャートである。
【図６】真空吸引系のブロック図である。
【符号の説明】
１−成型品取出機、１５−吸着部材、１７−チャック、２７−圧縮空気開閉弁、２９−負圧発生装置、３１−吸着圧検出器[0001]
[Technical field to which the invention belongs]
The present invention relates to a suction device that sucks and holds a workpiece when the workpiece is moved to a predetermined position, and a molded product take-out machine including the suction device.
[0002]
[Problems to be solved by the invention]
For example, in a molded product take-out machine that takes out a molded product as a workpiece molded by a resin molding machine to a predetermined position outside the resin molding machine, the chuck is held in a state where the molded product is sucked and held by a suction member provided in the chuck unit. The molded product is taken out by controlling the movement of the unit in the two-dimensional direction or the three-dimensional direction.
[0003]
For the suction device that sucks the molded product by making the suction member of the chuck unit negative pressure, for example, a negative pressure generator that generates negative pressure based on Bernoulli's law when passing the supplied compressed air is adopted. ing. In the case of the conventional suction device, for example, in the case of maintenance inspection work of the molded product take-out machine or when the molded product falls during the movement of the molded product and the movement of the chuck is stopped, the molding takes a long time. Even when a non-adsorption state of the product is expected, the supply of compressed air to the negative pressure generator is continued to maintain the negative pressure generation state.
[0004]
In order to continue the negative pressure generation state in this way, it is necessary to continue the supply of compressed air to the negative pressure generator, and hence the operation of the air compressor for generating the compressed air. Even if it is continued and therefore it is not necessary to generate a negative pressure, the electric motor must be driven to continue the operation of the air compressor, which is wasteful from the viewpoint of power consumption.
[0005]
This disadvantage is that, in a situation where the non-adsorption state of the molded product by the adsorption member is expected to continue for a long time, the operator closes the valve provided in the pipe from the air compressor to the negative pressure generator to compress the compressed air. However, in this case, it is necessary for the operator to close the valve, which takes time and effort.
[0006]
In addition to the above-described method of generating a negative pressure with compressed air, there is an adsorption device in which a vacuum is formed by exhausting with an exhaust pump such as a rotary pump, and the workpiece is vacuum adsorbed by the vacuum pressure. However, when the non-adsorption state of the workpiece continues for a long time and the operator does not close the vacuum opening / closing member of the vacuum generation device and the adsorption member, the adsorption member itself communicates with the atmosphere to be in a low vacuum state. Therefore, the operation of the vacuum generator is continued, and there is a problem that power consumption for operating the vacuum generator increases.
[0007]
The present invention has been invented in order to solve the above-described conventional drawbacks, and a problem to be solved by the present invention is that a negative pressure generator is used when a non-adsorption state of a workpiece by an adsorption member continues for a predetermined time or more. An object of the present invention is to provide a suction device and a molded product take-out machine that can control the cut-off of the supply of compressed air to reduce the consumption of compressed air and reduce the suction cost of the workpiece.
[0008]
Another object of the present invention is to provide a suction device and a molded product take-out machine that can reduce the cost of suction of a workpiece reliably without the labor of an operator.
[0009]
[Means for Solving the Problems]
According to a first aspect of the present invention, a compressed air supply source that supplies compressed air having a predetermined pressure, a negative pressure generating device that generates a negative pressure with the supplied compressed air, and an adsorption member that adsorbs and holds a workpiece with a negative pressure are provided. In the adsorption device connected by piping, provided in the piping between the compressed air supply source and the negative pressure generating device, the compressed air opening and closing member for opening and closing the compressed air flow path, and the piping between the negative pressure generating device and the adsorption member A negative pressure detecting member that detects a negative pressure in the pipe and a negative pressure detected by the negative pressure detecting member is equal to or greater than a predetermined value; While maintaining and controlling the open state of the compressed air opening / closing member, when the negative pressure detected by the negative pressure detecting member continues for a preset time or longer, the compressed air opening / closing member is controlled to close. Supply of compressed air to the negative pressure generator Characterized by comprising a control means for blocking.
[0010]
The present invention provides a suction device in which a vacuum generation source that evacuates air to form a vacuum and an adsorption member that vacuum-sucks a workpiece are connected by piping. An open / close member that opens and closes, a vacuum pressure detection member that is provided in a pipe on the suction member side, detects a vacuum pressure in the pipe, and a vacuum pressure detected by the vacuum pressure detection member is higher than a predetermined value. While detecting that the workpiece has been attracted to the member and maintaining and controlling the open state of the opening and closing member, when the vacuum pressure below the predetermined value detected by the vacuum pressure detecting member continues for a preset time, Control means for controlling the closing operation of the opening / closing member to block vacuum formation of the suction member is provided.
[0011]
According to a fifth aspect of the present invention, there is provided a molded product take-out machine for controlling the movement of a chuck for adsorbing and holding a molded product and taking out the molded product from a resin molding machine to a predetermined release position, and an adsorption member provided on the chuck and compression at a predetermined pressure. A compressed air supply source that supplies air and a negative pressure generator that generates negative pressure by the supplied compressed air are connected by a pipe, and are provided in a pipe between the compressed air supply source and the negative pressure generator. A compressed air opening / closing member that opens and closes the air flow path, a negative pressure detection member that is provided in a pipe between the negative pressure generator and the adsorption member, and that detects a negative pressure in the pipe, and a negative pressure detected by the negative pressure detection member When the pressure is greater than or equal to a predetermined value, it detects that the workpiece has been adsorbed by the adsorbing member and maintains and controls the open state of the compressed air opening / closing member, while the negative pressure detected by the negative pressure detecting member is equal to or less than the predetermined value. Is less than the preset time To continue is characterized in that a negative pressure suction means comprising a compressed air opening and closing member and a control means for interrupting the supply of compressed air to the closing operation is controlled to a negative pressure generator.
[0012]
According to a sixth aspect of the present invention, there is provided a molded product take-out machine that controls the movement of a chuck that holds the molded product by vacuum suction and takes out the molded product from the resin molding machine to a predetermined release position. The vacuum generation source that forms the vacuum is connected by piping, and is provided in the piping on the vacuum generation source side, and is provided in the opening and closing member that opens and closes the vacuum flow path, and in the piping on the suction member side. When the vacuum pressure detecting member for detecting the pressure and the vacuum pressure detected by the vacuum pressure detecting member are equal to or higher than a predetermined value, it is detected that the workpiece is adsorbed to the adsorbing member and the open / close member is maintained open. On the other hand, when the vacuum pressure below the predetermined value detected by the vacuum pressure detection member continues for a preset time or longer, the control means for closing the vacuum formation of the suction member by controlling the opening / closing member to close Vacuum suction means Characterized by comprising.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, it demonstrates according to embodiment of the molded article extraction machine provided with the adsorption | suction apparatus of this invention.
Embodiment 1
First, the outline of the molded product take-out machine 1 in which the suction device of the present invention is adopted will be described. In FIGS. 1 and 2, the main body frame of the molded product take-out machine 1 is placed on the fixed side mounting plate 3 of the resin molding machine. The base of 5 is fixed. The main body frame 5 is formed in a direction orthogonal to the central axis (longitudinal direction) of the resin molding machine and has a length extending upward from the mold and to the operation side or the non-operation side outside the resin molding machine, and the left and right traveling bodies 7 are orthogonal to the axis. It is supported so that it can reciprocate in the direction.
[0014]
The left and right traveling bodies 7 are provided with front and rear frames 9 extending in the axial direction, and the front and rear traveling bodies 11 are supported on the front and rear frames 9 so as to be capable of reciprocating in the axial direction. A lift frame 13 is supported on the front and rear traveling body 11 so as to be movable in the vertical direction, and a chuck 17 provided with a plurality of suction members 15 for sucking a molded product is attached to the lower part of the lift frame 13.
[0015]
The left and right traveling bodies 7 with respect to the main body frame 5, the front and rear traveling bodies 11 with respect to the front and rear frames 9, and the lifting frame 13 with respect to the front and rear traveling bodies 11 drive and control electric motors 19, 21, and 23 such as servo motors, for example. Is reciprocated. The reciprocating drive mechanism using the electric motors 19, 21, and 23 includes a feed screw drive mechanism in which a nut is engaged with a feed screw that is connected to the electric motor and rotates, and an endless belt having a predetermined length is attached to an endless belt. An endless belt driving mechanism in which a toothed rotating body provided on a rotating shaft is meshed, and an endless belt in which a part of an endless belt stretched between a pair of rotating bodies connected to an electric motor is fixed to a movable portion. Any of driving mechanisms may be used. Moreover, the linear motor which comprised electric motor 19,21,23 itself from the stator and the needle | mover may be sufficient.
[0016]
The left and right traveling bodies 7 are provided with a negative pressure regulator 25, a compressed air opening / closing valve 27, a negative pressure generator 29, an adsorption pressure detector 31, an injection air pressure regulator 33, and an injection air opening / closing valve 35.
[0017]
Among them, the negative pressure regulator 25 is a diaphragm, an intake solenoid valve, an exhaust solenoid valve, etc., and has a structure capable of steplessly controlling the air pressure in proportion to the input electric signal. For example, compressed air supplied from a connected compressed air pipe, for example, air pressure: 5 kg / cm ² is variably adjusted to a desired pressure.
[0018]
The negative pressure regulator 25 does not constitute the present invention, and the compressed air supplied from the compressed air pipe may be directly supplied to the negative pressure generator 29 without providing the negative pressure regulator 25. Moreover, although the above-described negative pressure regulator 25 is configured to be controlled based on an electrical signal, it may be a manual adjustment structure in which the operator manually adjusts the degree of opening and closing.
[0019]
The compressed air opening / closing valve 27 is constituted by an electromagnetic solenoid valve provided in a pipe connecting the negative pressure regulator 25 and the negative pressure generator 29, and supplies or blocks compressed air to the negative pressure generator 29. .
[0020]
The negative pressure generator 29 is configured to generate a negative pressure based on Bernoulli's law when supplied compressed air passes. The negative pressure (adsorption pressure) generated by the negative pressure generator 29 is adjusted according to the compressed air pressure varied by the negative pressure regulator 25.
[0021]
The adsorption pressure detector 31 is provided in the middle of a pipe connecting the negative pressure generating device 29 and the adsorption member 15, for example, a configuration in which a strain gauge as a piezoelectric element such as a piezo element or a bimorph element is provided in a diagram, An electric signal corresponding to the deformation amount of the strain gauge accompanying the change is output.
[0022]
An injection pipe is branchedly connected to the upstream side of the negative pressure regulator 25 and the downstream side of the adsorption pressure detector 31, and an injection air pressure regulator 33 and an injection air on-off valve 35 are provided in series on the injection pipe. It is done. The injection air pressure regulator 33 has the same structure as that of the negative pressure regulator 25, and variably controls the supplied compressed air pressure to a desired pressure when the compressed air pressure injected when the suction of the molded product by the suction member 15 is released. To do. The blast air opening / closing valve 35 is constituted by an electromagnetic solenoid valve or the like, and supplies or blocks compressed air whose pressure is adjusted to the adsorbing member 15.
[0023]
In FIG. 4, the central processing unit (CPU) 43 of the control means 41 includes a program memory 45, a work memory 47 and a timer 49. The program memory 45 stores various program data such as program data for the molded product take-out machine 1 to execute a molded product take-out operation, suction program data for sucking a molded product and prohibiting suction under a predetermined condition. As will be described later, the timer 49 measures a predetermined time when the supply of compressed air to the negative pressure generator 29 is shut off.
[0024]
The work memory 47 is set in accordance with a position storage area 47a for storing various position data for controlling the movement of the chuck 17 for executing the molded product take-out operation, the hardness of the molded product material, the size, shape, weight, and the like. An adsorption pressure area 47b for storing optimum adsorption pressure data, a prohibition time area 47c for storing prohibition time data set to prohibit the generation of negative pressure when the non-adsorption state of the molded product by the adsorption member 15 continues, and the like. Have.
[0025]
The prohibition time data stored in the prohibition time region 47c is arbitrarily set at least in the molded product take-out cycle (time) or more.
[0026]
A setting device 51 and an adsorption pressure detector 31 are connected to the CPU 43 via an interface 53. The setting device 51 is a position setting means 51a such as a numeric keypad and an execution key for setting and inputting position data relating to each movement position of the chuck 17, an adsorption pressure setting means 51b for setting and inputting optimum adsorption pressure data according to various molded products, The prohibition time setting means 51c for setting the prohibition time data for prohibiting the generation of negative pressure when the non-adsorption state of the molded product continues, the mode switching means 51d for switching to the above-described data setting mode, and the respective modes are input. A display member 51e such as an LCD for displaying data to be displayed.
[0027]
The position setting means 51a, the adsorption pressure setting means 51b, and the prohibition time setting means 51c are substantially constituted by a common numeric keypad and execution key, and various modes are input by switching each mode by the mode switching means 51d. You just have to do it. Further, the adsorption pressure detector 31 outputs an electric signal corresponding to the negative pressure in the adsorption member 15 to the CPU 43.
[0028]
A valve drive control circuit 55 is connected to the CPU 43, and a negative pressure regulator 25, a compressed air on-off valve 27, etc. are connected to the valve drive control circuit 55.
[0029]
The valve drive control circuit 55 controls the operation of the negative pressure regulator 25 based on the adsorption pressure data stored in the adsorption pressure region 47b to change and adjust the compressed air pressure supplied to the negative pressure generator 29.
[0030]
The valve drive control circuit 55 normally opens the compressed air opening / closing valve 27 and supplies the compressed air pressure-adjusted by the negative pressure regulator 25 to the negative pressure generator 29 to generate a negative pressure in the adsorption member 15. On the other hand, when the non-adsorption state of the molded product by the adsorbing member 15 continues for a predetermined time stored in the prohibition time region 47 c, the compressed air on / off valve 27 is closed and the compressed air to the negative pressure generating device 29 is closed. Shut off the supply.
[0031]
The CPU 43 is connected to servo driver circuits (not shown) of the electric motors 19, 21 and 23 for moving the chuck 17 in the left-right direction, the front-rear direction, and the up-down direction, and is stored in the position storage area 47a. Based on the position data, drive control is performed to move the chuck 17 to each position.
[0032]
Next, the adsorption action of the molded product and the negative pressure generation inhibition action by the adsorption member 15 will be described.
[0033]
First, the adsorption process of the molded product will be described. For example, when the compressed air pressure supplied to the primary side of the negative pressure regulator 25 is 5 kg / cm ² , the maximum generated negative pressure of the negative pressure generator 29 is −60 kps. The operator sets the optimum adsorption pressure by the adsorption member 15 within the above −60 kps, for example, −40 kps according to the type (hardness, size, weight, shape, etc.) of the molded product and stores it in the adsorption pressure area 47b. Let
[0034]
Thus, the valve drive control circuit 55 controls the operation of the negative pressure regulator 25 based on the optimum negative pressure data stored in the adsorption pressure region 47b so that the negative pressure generated by the negative pressure generator 29 becomes −40 kps. Adjust the compressed air pressure.
[0035]
The chuck 17 is controlled to move in the left-right direction, the front-rear direction, and the up-down direction between the molds of the resin molding machine and the operation side (reverse operation side) of the resin molding machine. The product is picked up and held and the removal operation is executed.
[0036]
At that time, the CPU 43 determines whether or not the suction member 15 holds the molded product by suction based on the negative pressure of the suction member 15 detected by the suction pressure detector 31. That is, when the suction member 15 holds the molded product by suction, the negative pressure detected by the suction pressure detector 31 is close to −40 kps, and conversely, the suction member 15 does not hold the molded product by suction. Since the adsorption member 15 communicates with the atmosphere, the negative pressure detected by the adsorption pressure detector 31 is, for example, −10 kps or less. Thus, it is determined whether or not the molded product is sucked and held on the suction member 15 based on the negative pressure of the suction member 15 detected by the suction pressure detector 31.
[0037]
When opening the molded product adsorbed and held by the adsorbing member 15 at a predetermined opening position, the valve drive control circuit 55 opens the injection air on-off valve and compresses the pressure adjusted by the injection air pressure regulator 33. Air is ejected from the adsorbing member 15 to forcibly release the adsorbed state of the molded product.
[0038]
When taking out the molded product as described above, the molded product falls from the adsorbing member 15 so that the removal failure or the operation of the chuck 17 is stopped and maintenance inspection is performed. .
[0039]
That is, as shown in FIG. 5, it is determined whether or not the compressed air opening / closing valve 27 is opened by step 61 and compressed air is supplied to the negative pressure generating device 29 so that the suction member 15 is formed with negative pressure. When step 61 is NO, the compressed air opening / closing valve 27 is opened by step 62 and compressed air is supplied to the negative pressure generating device 29 to form a negative pressure on the adsorbing member 15 and the process returns to step 61.
[0040]
On the other hand, when the compressed air is supplied to the negative pressure generating device 29 and a negative pressure corresponding to the compressed air having a flow rate corresponding to the opening degree of the compressed air opening / closing valve 27 is generated and the step 61 is YES, the molding by the adsorption member 15 is performed. The product can be held by suction.
[0041]
In this state, the adsorbing member 15 adsorbs and holds the molded product depending on whether or not the negative pressure of the adsorbing member 15 detected by the adsorbing pressure detector 31 in step 63 has reached the vicinity of a preset optimum adsorption pressure of −40 kps. Judge whether or not.
[0042]
When the negative pressure detected by the adsorption pressure detector 31 is equal to or higher than the predetermined negative pressure, it is determined that the adsorption member 15 is adsorbing and holding the molded product, and the process returns to step 61.
[0043]
On the other hand, when the negative pressure detected by the adsorption pressure detector 31 is lower than the set optimum negative pressure, the above step 63 becomes NO, and then the timer 49 is started at step 64 to start the time measurement. After that, it is determined whether or not the time measured in step 65 has reached a predetermined prohibition time stored in advance in the prohibition time area 47c.
[0044]
If the time measured by the timer 49 has not reached the prohibition time and step 64 is NO, the process returns to step 61. Normally, when the molded product removal operation is continuously performed, the determination in step 63 is YES or the determination in step 65 is NO because the suction member 15 again holds the molded product by suction within the predetermined time described above. The compressed air is continuously supplied to the negative pressure generating device 29 to maintain the negative pressure generating state. For this reason, the prohibition time may be set to at least the removal cycle (time) of the molded product.
[0045]
On the other hand, for example, when the molded product falls due to an adsorption failure by the adsorption member 15 in the middle of taking out the molded product and the movement of the chuck 17 is stopped urgently, or when the movement of the chuck 17 is completely stopped by maintenance and inspection work, The time measured by the timer 49 becomes equal to or longer than the prohibited time, and the determination in step 65 is YES.
[0046]
In this case, the compressed air opening / closing valve 27 is controlled to be closed in step 66 to interrupt the supply of compressed air to the negative pressure generator 29. As a result, in a state where it is not expected that the molded product is adsorbed and held for a long time, the supply of compressed air to the negative pressure generating device 29 is interrupted to restrict the generation of negative pressure, thereby reducing the consumption of compressed air and hence the compression. Stop the operation of the air compressor that generates air.
[0047]
Next, in step 67, an instruction signal for opening the compressed air on-off valve 27 in order to perform an operation of manually releasing the holding of the molded product by the suction member 15 or an operation of releasing the molded product during automatic operation of taking out the molded product. Is input, and if an instruction signal is input, the process returns to step 61 in order to execute a molded product suction operation. On the contrary, when the instruction signal is not input and the non-adsorption state of the molded product by the adsorption member 15 continues, the process returns to step 67, and the compressed air is supplied to the negative pressure generator 29 until the instruction signal is input. Interrupt.
[0048]
Embodiment 2
The suction device according to the first embodiment has been described with respect to the suction device that supplies the negative pressure generating device 29 with compressed air to generate the negative pressure on the suction member 15, but the second embodiment forms each suction member 15 in a vacuum. The present invention relates to a suction device that vacuum-sucks molded products.
[0049]
In FIG. 6, each suction member 15 provided on the chuck 17 is connected to an exhaust pipe 73 of a vacuum generator 71 that generates a predetermined vacuum pressure by being exhausted by a rotary pump or the like, and the vacuum generator 71 side of the exhaust pipe 73 is connected. Is provided with a vacuum switching member 75. A vacuum pressure detection member 77 is provided on the suction member 15 side of the exhaust pipe 73 and outputs an electrical signal corresponding to the vacuum pressure in the exhaust pipe 73 on the suction member 15 side. The vacuum generator 71 is configured to intermittently drive the exhaust pump so that a predetermined vacuum pressure is always obtained.
[0050]
The vacuum opening / closing member 75 is configured by an electromagnetic solenoid valve, and opens / closes the exhaust pipe 73 by an input opening / closing signal. Further, the vacuum pressure detecting member 77 is composed of a strain gauge or the like, and outputs an electric signal corresponding to the vacuum pressure on the suction member 15 side in the exhaust pipe 73.
[0051]
About the structure of the molded product extraction machine 1, since it is the same as that of Embodiment 1, the same code | symbol is attached | subjected as needed and detailed description is abbreviate | omitted.
[0052]
Normally, the vacuum opening / closing member 77 is opened to form the suction member 15 in a vacuum, and the molded product is vacuum-sucked. At this time, when the molded product is vacuum-adsorbed to the suction member 15, the suction port of the suction member 15 is blocked by the molded product and is not in communication with the atmosphere. Based on the fact that the inside of the exhaust pipe 73 becomes a high vacuum state equal to or higher than a predetermined vacuum pressure, the adsorption holding of the molded product can be detected.
[0053]
When the molded product falls from the adsorption member 15 during the removal of the molded product and the movement of the chuck 17 is stopped, or when the movement of the chuck 17 is stopped and the molded product take-out machine 1 is maintained and inspected, Since the molded product is not adsorbed by the adsorption member 15 and communicates with the atmosphere, the inside of the exhaust pipe 73 is in a low vacuum state. Thereby, the non-adsorption state of the molded product by the adsorption member 15 is detected.
[0054]
When the non-adsorption state of the molded product by the adsorbing member 15 continues for the prohibition time stored in the prohibition time region 47c, the vacuum opening / closing member 75 is controlled to close and the exhaust pipe 73 of the vacuum generator 71 is connected to the adsorbing member. A predetermined vacuum state is maintained by restricting communication with the atmosphere via 15. As a result, it is not necessary to continue exhaust driving of the vacuum generator 71, and power consumption for that purpose can be reduced.
[0055]
The molded product take-out machine of the above embodiment has a structure in which the chuck 17 provided with the suction member connected to the suction device is controlled to move in the three-dimensional direction of the left-right direction, the front-rear direction, and the vertical direction to take out the molded product. The molded product take-out machine is not limited to this, and any type may be used as long as the chuck is rotated in a two-dimensional direction.
[0056]
In the second embodiment, the vacuum generator is configured to intermittently drive and control the exhaust pump so as to always generate a predetermined vacuum pressure. Even if the vacuum pressure regulator that can be adjusted electrically or manually is provided, and the exhaust pump of the vacuum generator is intermittently driven so that the predetermined vacuum pressure set by the vacuum pressure regulator is obtained. Good.
[0057]
【The invention's effect】
In the present invention, when the non-adsorption state of the workpiece by the adsorption member continues for a predetermined time or more, the supply of compressed air to the negative pressure generator is cut off to reduce the consumption of compressed air, thereby reducing the adsorption cost of the workpiece. can do. In addition, it is possible to reliably reduce the cost of picking up the workpiece without the labor of the operator.
[Brief description of the drawings]
FIG. 1 is an overall perspective view showing an outline of a molded product take-out machine in which an adsorption device of the present invention is adopted.
FIG. 2 is a schematic perspective view showing the back side of the left and right traveling bodies.
FIG. 3 is an explanatory view showing an adsorption system.
FIG. 4 is an electrical block diagram showing an outline of control of the adsorption system.
FIG. 5 is a flowchart showing a negative pressure generation prohibition process.
FIG. 6 is a block diagram of a vacuum suction system.
[Explanation of symbols]
1-molded product take-out machine, 15-adsorption member, 17-chuck, 27-compressed air on-off valve, 29-negative pressure generator, 31-adsorption pressure detector

Claims

A suction device in which a compressed air supply source that supplies compressed air of a predetermined pressure, a negative pressure generating device that generates a negative pressure by the supplied compressed air, and a suction member that sucks and holds the workpiece by a negative pressure are connected by piping. In the pipe between the compressed air supply source and the negative pressure generating device, provided in the compressed air opening / closing member for opening and closing the compressed air flow path, and the pipe between the negative pressure generating device and the adsorbing member. When the negative pressure detection member for detecting the pressure and the negative pressure detected by the negative pressure detection member are equal to or greater than a predetermined value, it is detected that the work has been adsorbed by the adsorption member and the compressed air opening / closing member is opened. On the other hand, when the negative pressure below the predetermined value detected by the negative pressure detecting member continues for a preset time or longer, the compressed air opening / closing member is controlled to be closed to control the compressed air to the negative pressure generating device. Control means to cut off supply Suction device provided.

In a suction device in which a vacuum generation source that evacuates air to form a vacuum and a suction member that vacuum-sucks a workpiece are connected by piping, an opening / closing member that is provided in the vacuum generation source side piping and opens and closes the vacuum flow path; A vacuum pressure detection member that is provided in a pipe on the suction member side and detects the vacuum pressure in the pipe; and when the vacuum pressure detected by the vacuum pressure detection member is equal to or greater than a predetermined value, the workpiece is sucked to the suction member. When the vacuum pressure below the predetermined value detected by the vacuum pressure detection member continues for a preset time while the open / close member is maintained and controlled by detecting this, the opening / closing member is closed. A suction device comprising a control means for controlling and blocking vacuum formation of the suction member.

The adsorption device according to claim 1, wherein a compressed air flow rate adjusting member is provided in a pipe between the compressed air supply source and the negative pressure generating device, and the amount of compressed air supplied to the negative pressure generating device is variable to control the negative pressure.

The suction device according to claim 2, wherein a vacuum pressure adjusting member is provided in a pipe between the vacuum generation source and the vacuum pressure detecting member so that the vacuum pressure in the suction member can be varied.

In a molded product take-out machine that takes out a molded product from a resin molding machine to a predetermined release position by controlling movement of a chuck that holds and holds the molded product, compression that supplies an adsorption member provided on the chuck and compressed air of a predetermined pressure An air supply source and a negative pressure generator that generates negative pressure by the supplied compressed air are connected by a pipe, and the compressed air flow path is opened and closed by a pipe between the compressed air supply source and the negative pressure generator. A compressed air opening and closing member, a negative pressure detecting member that is provided in a pipe between the negative pressure generating device and the adsorbing member, and that detects a negative pressure in the pipe, and the negative pressure detected by the negative pressure detecting member is a predetermined value or more In this case, it is detected that the workpiece is adsorbed by the adsorbing member, and the open state of the compressed air opening / closing member is maintained and controlled, while a negative pressure equal to or lower than a predetermined value detected by the negative pressure detecting member is preset. When it lasts for more than an hour The compressed air closing member molded article take-out machine provided with a negative pressure suction means comprising a control means for interrupting the supply of compressed air to the closing operation is controlled to a negative pressure generating device.

In a molded product take-out machine that moves and controls a chuck that holds the molded product by vacuum suction and holds the molded product from a resin molding machine to a predetermined release position, the suction member provided on the chuck and air are exhausted to form a vacuum. A vacuum source is connected to the vacuum source and provided on the vacuum source side pipe, and an open / close member that opens and closes the vacuum flow path, and a vacuum provided on the suction member side pipe for detecting the vacuum pressure in the pipe. When the vacuum pressure detected by the pressure detection member and the vacuum pressure detection member is equal to or greater than a predetermined value, it is detected that the workpiece has been sucked by the suction member, and the open / close member is maintained open and controlled. A vacuum suction means comprising a control means for controlling the closing operation of the opening / closing member to shut off the vacuum formation of the suction member when the vacuum pressure detected by the detection member continues for a preset time or longer. Molding provided Take-out machine.

6. The molded product takeout machine according to claim 5, wherein a compressed air flow rate adjusting member is provided in a pipe between the compressed air supply source and the negative pressure generator, and the negative pressure is controlled by making the amount of compressed air supplied to the negative pressure generator variable.

The molded product takeout machine according to claim 6, wherein a vacuum pressure adjusting member is provided in a pipe between the vacuum generation source and the vacuum pressure detecting member so that the vacuum pressure in the adsorption member can be varied.