JP4068224B2

JP4068224B2 - Drive device for print switching device of sheet-fed rotary printing press with reversing mechanism

Info

Publication number: JP4068224B2
Application number: JP19038798A
Authority: JP
Inventors: 京太郎小沼
Original assignee: Komori Corp
Current assignee: Komori Corp
Priority date: 1998-07-06
Filing date: 1998-07-06
Publication date: 2008-03-26
Anticipated expiration: 2018-07-06
Also published as: JP2000015779A

Description

【０００１】
【発明の属する技術分野】
本発明は、両面刷時に紙尻を保持して移動する吸引部材やくわえ爪の移動を片面刷時に非作動状態とする反転機構付枚葉輪転印刷機の印刷切替装置の駆動装置に関する。
【０００２】
【従来の技術】
この種の反転機構付枚葉輪転印刷機においては、両面刷時に紙尻を保持する吸引部材は、反転胴の回転にともない吸引部材側に設けられたカムフォロアが第１のカムに対接することにより、移動して紙を反転させるように構成されている。一方、片面刷時には吸引部材の移動が不要になるので、アクチュエータを作動させて第２のカムを吸着部材に設けられた別のカムフォロアに対接させることにより、反転胴の回転にもかかわらず吸着部材の移動を非作動状態にしている。
【０００３】
この反転機構付枚葉輪転印刷機の印刷切替装置の駆動装置としては、特開平１０−５８６５４号公報に開示されたものがある。ここに開示されたものは、紙尻を吸着する吸口と、この吸口側に設けられたカムフォロアが対接することにより吸口を移動させる吸口移動カムと、反転胴のベアラの外側に設けられた吸口駆動レバーと、反転胴の端軸に回動自在に支持され吸口駆動レバーに設けられたカムフォロアが対接するロックカムとが備えられている。ロックカムはリンク部材によって連結され、リンク部材には揺動自在に支持されたレバーが軸着され、このレバーの両端がエアーシリンダーの駆動で進出する押圧部材で選択的に押圧されることにより、吸口駆動レバーのカムフォロアがロックカムに対接し、反転胴の回転にもかかわらず吸口が反転胴の周面内側に没入した状態を保持するものである。
【０００４】
【発明が解決しようとする課題】
しかしながら、上述した従来の反転機構付枚葉輪転印刷機の印刷切替装置の駆動装置では、レバーの両端をエアーシリンダーの駆動で進出する押圧部材によって選択的に押圧する構造としているので、反転胴の停止位置がずれたときに、押圧部材とレバーとの位置がずれることがある。押圧部材とレバーとの位置がずれると、押圧部材の所定量の進出にもかかわらず、レバーを所定量回動することができなくなり、ロックカムも所定量移動できなくなる。このため、片面刷に切り替えても吸口を反転胴の内周面側に没入した状態にすることができず、片面刷時に吸口が反転胴の周面から突出してしまい、くわえ爪にくわえられた紙が吸口によって破損し機械を故障させるおそれがある。
【０００５】
本発明は上記した従来の問題に鑑みなされたものであり、その目的とするところは、片面・両面刷の切替えが確実に行われて機械の故障を防止した反転機構付枚葉輪転印刷機の印刷切替装置の駆動装置を提供することにある。
【０００６】
【課題を解決するための手段】
この目的を達成するために、本発明に係る反転機構付枚葉輪転印刷機の印刷切替装置の駆動装置は、搬送胴から受け取ったシート状物を反転させる反転胴と、片面・両面印刷切替時にシート状物の保持状態を変更させるカム手段を備えた反転機構付枚葉輪転印刷機の印刷切替装置の駆動装置であって、前記カム手段に連結された第１のシャフト部材と、フレームの外側に支持された第１、第２のアクチュエータと、この第１のアクチュエータにより進退可能に、かつ第２のアクチュエータにより回動可能に支持された第２のシャフト部材と、この第２のシャフト部材を進出させることにより、この第１のシャフトと前記第２のシャフトとを連結する継手部材とを備え、これら第１のシャフトと第２のシャフトと継手部材とでオルダム継手を形成したものである。
したがって、両面刷から片面刷に切替えるためにカム手段を作動させる際に、第２のシャフト部材に対して第１のシャフト部材が位置ずれを起こしてもオルダム継手を介して位置ずれが吸収される。
【０００７】
【発明の実施の形態】
以下、本発明の実施の形態を図に基づいて説明する。図１は本発明に係る反転機構付枚葉輪転印刷機の両面刷状態を示す胴配列図、図２は同じく操作側から視た反転胴の側面図である。図３は同じく原動側から視た反転胴の側面図、図４は同じく吸口と反転爪との動作を説明するための反転胴近傍の側面図、図５は同じく駆動装置を展開し一部を破断して示した正面図である。図６は図５におけるVI矢視図、図７は同じく要部を分解して示す模式図である。
図１において、互いに隣接する印刷ユニット、例えば２番目の印刷ユニット２と３番目の印刷ユニット３とには、刷版が装着された版胴２ａ，３ａと、ブランケットが巻かれたゴム胴２ｂ，３ｂとが、互いに対接しており、印刷ユニット２のゴム胴２ｂには、倍径の第１圧胴２ｃが対接している。
【０００８】
また、印刷ユニット３のゴム胴３ｂには、前記第１圧胴２ｃの下流側に位置する倍径の第２圧胴３ｃが対接しており、第１圧胴２ｃと第２圧胴３ｃとの間には、倍径の反転胴４が互いにその周面を両圧胴２ｃ，３ｃに対接するように設けられている。第１圧胴２ｃの外周部を円周方向に２等分する箇所には、くわえ爪と爪台とからなりカム機構で開閉する複数組のくわえ爪装置５（以下、このようなくわえ爪装置を単にくわえ爪という）が、この第１圧胴２ｃの軸線方向に並設されている。また、第２圧胴３ｃの外周部を円周方向に２等分する箇所には、カム機構で開閉する複数組のくわえ爪６が、この第２圧胴３ｃの軸線方向に並設されている。
【０００９】
さらに、反転胴４の外周部を円周方向に２等分する箇所には、カム機構で開閉する反転爪７と、図示しないポンプなどの吸引エア源に接続された複数個の吸口８とが、互いに近接し反転胴４の軸線方向に並設されており、片面刷の場合には、このうちの反転爪７が、第１圧胴２ｃ，反転胴４，第２圧胴３ｃの回転により前記くわえ爪５と対応するとともに、くわえ爪６とも対応するように位置付けられている。また、図に示す両面刷の場合には、第１圧胴２ｃ，反転胴４，第２圧胴３ｃの回転によりくわえ爪５にくわえられた紙１０の紙尻が吸口８と対応し、かつ反転爪７とくわえ爪６とが対応するように位置付けられている。
【００１０】
このように構成されていることにより、図に示す両面刷の場合、第１圧胴２ｃ，反転胴４，第２圧胴３ｃが回転すると、くわえ爪５にくわえられて搬送される紙１０には、ゴム胴２ｂと第１圧胴２ｃとの間を通過するときに表面に印刷が施され、この紙１０は、くわえ端を反転爪７にくわえ替えられることなく第１圧胴２ｃ，反転胴４の対接点を通過し、第１圧胴２ｃの下側周面に巻付けられる。
【００１１】
巻付けられた紙１０の紙尻が第１圧胴２ｃ，反転胴４の対接点に達すると、この紙尻が吸口８で吸引されて搬送され、搬送途中においてくわえ端はくわえ爪５のくわえから解放される。吸口８に吸引されている紙１０の紙尻は、反転爪７にくわえ替えられて搬送されることにより反転されて裏返しになり、反転爪７から第２圧胴３ｃのくわえ爪６にくわえ替えられて第２圧胴３ｃによって搬送される。搬送される紙１０には、ゴム胴３ｂと第２圧胴３ｃとの間を通過するときに裏面に印刷が施される。
【００１２】
このような両面刷から片面刷に切替える場合には、第１圧胴２ｃのくわえ爪５が反転胴４の反転爪７に対応するように、第１圧胴２ｃを含む紙搬送方向に対して上流側に位置する胴群の位相を調節する。この状態で第１圧胴２ｃ，反転胴４，第２圧胴３ｃ等が回転すると、くわえ爪５にくわえられて搬送される紙１０には、印刷ユニット２のゴム胴２ｂと第１圧胴２ｃとの間を通過するときに２色目の印刷が施され、この紙１０のくわえ端がくわえ爪５から反転爪７にくわえ替えられて反転胴４の下側周面に巻付けられながら搬送される。巻付けられた紙１０は、反転爪７からくわえ爪６にくわえ替えられて搬送され、印刷ユニット３のゴム胴３ｂと第２圧胴３ｃとの間を通過するときに、前と同じ面に３色目の印刷が施される。
【００１３】
このように動作する倍径の圧胴２ｃ，３ｃと反転胴４とを備えた反転機構付枚葉輪転印刷機には、紙保持機構としての吸口８を作動位置と退避位置との間で移動させるカム機構が設けられており、両面刷と片面刷との反転切替え時には、これらのカム機構の作動位置を所定位置へ移動させなければならない。
【００１４】
以下、図２および図３に基づいて、吸口８を作動位置と退避位置との間で移動させるカム機構について説明する。
図示を省略したベアラに設けられた軸受に回動自在に支持された上下レバー駆動軸１１の両端突出部には、Ｌ字状に形成された一対の上下レバー１２が、それぞれ割締め固定されている。この一方の上下レバー１２の一方の揺動端に設けられたカムフォロア１３は、図示を省略したフレーム側に固定された吸口移動カム１４の大径部１４ａと小径部１４ｂに対接している。図示を省略したベアラに設けられた軸受に回動自在に支持された送りレバー駆動軸１５の両端突出部には、一対の送りレバー１６が、それぞれ割締め固定されている。この一方の送りレバー１６の一方の揺動端に設けられたカムフォロア１７は、フレーム側に固定された吸口回動カム１８の大径部１８ａと小径部１８ｂに対接している。
【００１５】
図３に示すように、反転胴４の一方のベアラの外方には、前記上下レバー１２の揺動端に図示を省略したリンク部材によって連結されたＬ字状の吸口駆動レバー２０が設けられている。この吸口駆動レバー２０の基部近傍と前記送りレバー１６の揺動端とが図示を省略したリンク部材で連結されている。図２に示すように、反転胴４の他方のベアラの外方には、前記上下レバー１２の他方の揺動端に連結ピン２１で回動自在に設けられた吸口駆動レバー２２とギアホルダ２３とが重なり合って設けられている。前記送りレバー１６の揺動端と前記吸口駆動レバー２２とは図示を省略したリンク部材で連結されている。
【００１６】
前記ギアホルダ２３の外周部には、円弧状のセグメントギア２４が固定されており、前記吸口駆動レバー２２の揺動端には、このセグメントギア２４と噛合う中間ギア２５が回動自在に設けられている。吸口駆動レバー２２の揺動端と、一方のベアラ側に設けられた吸口駆動レバー２０の揺動端との間には、両端が閉塞中空状の吸口軸２６が回動自在に軸支されている。この吸口軸２６の軸端部には、前記中間ギア２５と噛合うギア２７が軸端部に固定され、複数個の吸口８が反転爪７と軸線方向に位相を違えて並設されている。
【００１７】
このような構成において、反転胴４が回転して吸口回動カム１８の高低により両側の送りレバー１６が揺動すると、図示を省略したリンク部材に連結された吸口駆動レバー２０，２２が連結ピン２０ａ，２１を中心に揺動し、中間ギア２５がセグメントギア２４と噛合いながら転動する。したがって、中間ギア２５とギア２７との噛合により、吸口軸２６および吸口８が自転しながら反転胴４の周方向へ往復動するように構成されている。
【００１８】
そして、この吸口８の移動に際しては、両側の一対の上下レバー１２が吸口移動カム１４により揺動し、連結ピン２０ａ，２１が反転胴４の半径方向に上下動する。したがって、吸口駆動レバー２０，２２およびセグメントギア２４が吸口８を伴い一体となって上下動し、前記反転胴４の円周方向への移動との合成運動により、図２に実線と鎖線とで示すように、反転爪７と爪台７ａとを越えるような円弧運動をするように構成されている。
【００１９】
以下、このような構成において、図４に基づいて、両面刷時における吸口の動作を説明する。
第１圧胴２ｃ、反転胴４、第２圧胴３ｃが矢印方向に回転すると、紙１０は第１圧胴２ｃのくわえ爪５にくわえ端がくわえられて胴周面に巻付けられることにより搬送される。そして、紙１０のくわえ端が第１圧胴２ｃ，反転胴４の対接点に達したのちもくわえ爪５のくわえから解放されることなく第１圧胴２ｃの下側周面に巻付けられる。このようにして巻付けられる紙１０の紙尻が第１圧胴２ｃ，反転胴４の対接点に達したとき、すなわち吸口８が第１圧胴２ｃの中心と反転胴４の中心とを結ぶ線上に達したときに吸気口からの吸気により紙尻が吸口８に吸着される。
【００２０】
吸口８が紙尻を吸着した状態で反転胴４が回転を続け、反転胴４側のカムフォロア１７，１３を、吸口回動カム１８と吸口移動カム１４との外周カム面に圧接させながら周回する。吸口８は吸口回動カム１８の作用で回動しかつ反転胴４の円周方向へ移動するとともに、反転胴４の回転により吸口移動カム１４に対するカムフォロア１３の対接位置が移動する。したがって、上下レバー１２の揺動等を介して吸口８が反転胴４の半径方向に移動して反転胴４の周面から突出する。この結果、前記円周方向への移動との合成運動により、吸口８は図５に符号８Ａ〜８Ｇで示すように、図中反時計方向に自転しながら反転胴４の周面外側に沿って周回する。
【００２１】
このようにして吸口８が紙尻を保持して符号８Ｇで示す位置まで移動することにより紙１０は裏返しに反転される。なお、吸口８が第１圧胴２ｃ，反転胴４の対接点に位置して紙尻を吸着するまでは、第１圧胴２ｃのくわえ爪５は閉じていて紙１０をくわえから解放せず、吸口８が紙１０の紙尻を吸着すると同時にくわえ爪５が開いて紙１０をくわえから解放する。
【００２２】
反転胴４が回転し紙１０を吸着した吸口８が符号８Ｇで示す位置に達すると、ロータリバルブの作用で吸口８からのエアの吸引が断たれ、紙１０の吸着が解かれる。これと同時に、吸口８による吸着から解放された紙１０が反転爪７のくわえ面にくわえ替えられる。反転胴４がさらに回動して反転爪７が第２圧胴３ｃのくわえ爪６に対向すると、反転爪７と第２圧胴３ｃのくわえ爪６が開閉して紙１０のくわえ替えが行われ、紙１０は第２圧胴３ｃのくわえ爪６にくわえられて搬送されながら裏面に印刷が施される。一方、符号８Ｇで示す位置で反転爪７に紙１０を渡したのちの吸口８は、反転胴４，第２圧胴３ｃの対接点に達するまでの間に略９０°回動するとともに、反転胴４の周面から内部に没入するように半径方向へ移動するので、吸口８が第２圧胴３ｃの周面と干渉するというようなことがない。
【００２３】
さらに反転胴４が回動すると、吸口８は反転胴４，第２圧胴３ｃの対接点から両胴４，２ｃの対接点まで移動するが、この間において、吸口８は、吸口回動カム１８により略３６０°回動しながら反転胴４の円周方向に移動する。同時に、吸口移動カム１４による作用で反転爪７を乗り越え、反転胴４の周面に対し出没するように反転胴４の半径方向に移動する。
【００２４】
次に、片面刷時に、反転胴４の回転にもかかわらず、吸口８を反転胴４の周面内側に没入した状態で吸口８を作動可能状態から非作動状態とする切替装置を説明する。
図２に示すように、反転胴４の一方の端軸４ａには、リング部材２９が回動自在に設けられており、このリング部材２９には、前記上下レバー１２と送りレバー１６に対応して一対のロックカム２９ａ，２９ｂが固定されている。
【００２５】
これらロックカム２９ａ，２９ｂに対応して上下レバー１２および送りレバー１６のそれぞれの揺動端には、カムフォロア３０ａ，３０ｂが設けられている。図２に示すように、前記ロックカム２９ａ，２９ｂには、リンク部材３０ｃ，３０ｄ（リンク部材３０ｄは図示を省略）の一端が枢着され、これらリンク部材３０ｃ，３０ｄの他端には、リンク部材３１ａ，３１ｂ（リンク部材３１ｂは図示を省略）の一端が枢着されている。３２は後述するように、反転胴４の側端部に設けられた軸受部に回動自在に支持された第１のシャフト部材であって、リンク部材３１ａの他端が軸着されている。
【００２６】
このような構成において、図２に示すように、第１のシャフト部材３２を反時計方向に回動させると、リンク部材３１ａ，３０ｃを介してロックカム２９ａが反転胴４の端軸４ａの周りを図中時計方向に回動するので、送りレバー１６のカムフォロア３０ｂに係合する。したがって、送りレバー１６はレバー駆動軸１５を回動中心として、図中時計方向に回動し、その状態をロックカム２９ａとカムフォロア３０ｂとの係合で保持される。このため、カムフォロア１７が吸口回動カム１８から離間した状態となり、反転胴４の回転にもかかわらず送りレバー１６が非作動状態となって、吸口８が回動せず静止状態を保つ。
【００２７】
ロックカム２９ａの時計方向の回動は、リング部材２９を介してロックカム２９ｂを時計方向に回動させるので、ロックカム２９ｂが上下レバー１２のカムフォロア３０ａに係合する。したがって、上下レバー１２はレバー駆動軸１１を回動中心として、図中時計方向に回動し、その状態がロックカム２９ｂとカムフォロア３０ａとの係合で保持されるので、カムフォロア１３が吸口移動カム１４から離間した状態となる。したがって、反転胴４の回転にもかかわらず上下レバー１２が非作動状態となって、吸口８が反転胴４の周面から内側に没入した状態を保ち、片面刷での印刷が可能状態となる。
以上説明した両面刷から片面刷への切替装置は、従来から広く使用されている反転機構付枚葉輪転印刷機の印刷切替装置と格別変わるところはない。
【００２８】
次に、図５ないし図７に基づいて、本発明の特徴である印刷切替装置の駆動装置を説明する。
図５において、上述した第１のシャフト部材３２は、反転胴４の側端に形成した凹部に設けられた軸受３４と、反転胴４の側端に固定されたブラケット３５に設けられた軸受３６とによって回動自在に支持されている。３７は第１のシャフト部材３２に軸着された位置規制レバーであって、端部に止めねじ３８が螺合し、止めねじ３８の先端に突出する方向に付勢された小球が設けられている。上述したブラケット３５の表面には、この小球が係入される凹部が、第１のシャフト部材３２の回動方向に一対設けられている。これら一対の凹部に小球が係入することにより、第１のシャフト部材３２の回動位置が規制され、片面刷と両面刷との位置が規制されるように構成されている。４０は円板状の係合部材であって、一端に形成した凹部が上述した第１のシャフト部材３２の先端に嵌合されて固定され、他端には径方向に延在する溝４０ａが形成されており、この溝４０ａの先端は、図７に示すように、面取部４０ｂが形成されている。
【００２９】
４２は貫通孔４２ａが形成されたフレームであって、この貫通孔４２ａは、後述するように片面・両面印刷切替時に反転胴４を回転させるときに、この回転に追従して回動する第１のシャフト部材３２の回動軌跡に対応した位置に形成されている。フレーム４２の外側には、ピン４５を介して第２のアクチュエータとして機能する第２のエアーシリンダー４４が枢着され、この第２のエアーシリンダー４４のロッド４６の先端には、レバー４７の一端が枢着されている。このレバー４７の他端部は、中空部４７ｂを有する円筒部４７ａが形成され、この円筒部４７ａがフレーム４２に穿設された貫通孔４２ａに回動自在に支持され、抜け止め部材４８によって貫通孔４２ａからの抜けが規制されている。
【００３０】
５０は第２のシャフト部材であって、図７に示すように、中央部に断面Ｄカット状の切欠き５０ａが形成され、一端にねじ穴５０ｃが設けられた凸条体５０ｂが形成され、他端にはねじ穴が設けられた円柱状のボス５０ｄが突設されている。この第２のシャフト部材５０は、一端が上述したレバー４７の中空部４７ｂに係入され、切欠き５０ａにレバー４７に固定された係合子５１が係合されている。したがって、レバー４７がフレーム４２の貫通孔４２を回動中心として回動すると、係合子５１を介してこの第２のシャフト部材５０も一体的に回動するように構成されている。また、この第２のシャフト部材５０の切欠き５０ａの矢印Ａ−Ｂ方向の長さは、係合子５１の厚さよりも大きく形成されており、この長さ分だけ第２のシャフト部材５０は矢印Ａ−Ｂ方向に移動自在になるように構成されている。
【００３１】
５３は略軸状に形成された継手部材であって、図７に示すように、一端に上述した係合部材４０の凹溝４０ａの幅Ｌよりもやや小さい幅ｌに形成され、端面の両側部に面取部５３ｄが形成された凸条体５３ａが突設されている。他端には上述した第２のシャフト部材５０の凸条体５０ｂの幅よりも僅かに大きい幅の凹溝５３ｂが形成され、軸線方向に貫通し大径部と小径部からなり断面が階段状に形成された取付孔５３ｃが穿設されている。この継手部材５３は、通しボルト５５を取付孔５３ｃに嵌挿させ、第２のシャフト部材５０のねじ穴５０ｃに螺合させることにより、凹溝５３ｂが第２のシャフト部材５０の凸条体５０ｂに係入し、第２のシャフト部材５０に支持される。
【００３２】
取付孔５３ｃの内径を通しボルト５５の外径よりもやや大きく形成することにより、取付孔５３ｃと通しボルト５５との間には隙間５６が形成され、継手部材５３は隙間５６だけ取付孔５３ｃ内を遊動可能となるように第２のシャフト部材５０に支持される。また、継手部材５３の径をレバー４７の中空部４７ｂの内径よりもやや小さく形成することにより、継手部材５３と中空部４７ｂとの間には隙間５４が形成され、継手部材５３は中空部４７ａ内を遊動可能となるように嵌装されている。これら継手部材５３、係合部材４０および第２のシャフト部材５０によってオルダム継手が構成されている。
【００３３】
６０は第１のアクチュエータとして機能する第１のエアーシリンダーであって、スタッドボルト５９を介してフレーム４２に取り付けられたブラケット５８に固定されている。この第１のエアーシリンダー６０のロッド６０ａには、有底円筒状の連結部材６１がボルト６２を介して取り付けられ、連結部材６１の底部に形成した孔には上述した第２のシャフト部材５０のボス５０ｄが係入されている。このボス５０ｄには、連結部材６１の底部との間に介装されたワッシャー部材６４を介してボルト６４が螺入されており、第２のシャフト部材５０は連結部材６１を介してロッド６０ａに回動自在となるように連結されている。
【００３４】
次に、このような構成の印刷切替装置の駆動装置において、両面刷から片面刷に切り替える動作を説明する。
まず、第１のシャフト部材３２がフレーム４２の貫通孔４２ａに対向するように反転胴４を所定の角度回動させ、第１のエアーシリンダー６０を作動させロッド６０ａを図５中矢印Ａ方向に進出させる。連結部材６１を介して第２のシャフト部材５０が矢印Ａ方向に移動するので、継手部材５３がフレーム４２の貫通孔４２ａからフレーム４２の内側に進出し、継手部材５３の凸条体５３ａが係合部材４０の凹溝４０ａに係入する。
【００３５】
ここで、第１のシャフト部材３２がフレーム４２の貫通孔４２ａに対向しないで位置ずれを起こしている場合、すなわち、図７において、第２のシャフト部材５０に対して第１のシャフト部材３２が反転胴４の円周方向であるＲ方向に位置ずれを起こしている場合には、第２のシャフト部材５０を矢印Ａ方向に移動させると、継手部材５３の凸条体５３ａと係合部材４０の凹溝４０ｂとが交差するような当接する。さらに第２のシャフト部材５０を矢印Ａ方向に移動させると、凸条体５３ａの面取部５３ｄが凹溝４０ａの面取部４０ｂを押圧しながら、継手部材５３が矢印ＸおよびＹ方向に微動する。凸条体５３ａの幅ｌが係合部材４０の凹溝４０ａの幅Ｌよりもやや小さく形成されているので、凸条体５３ａが凹溝４０ａ内に係入する。
このように、第１のシャフト部材３２がフレーム４２の貫通孔４２ａに対向しないで位置ずれが起きても、凸条体５３が凹溝４０ａに係入するように、継手部材５３によって位置ずれが吸収できる。
【００３６】
凸条体５３ａが凹溝４０ａ内に係入したら、第２のエアーシリンダー４４を作動させロッド４６を図６中矢印Ｄ方向に後退させると、レバー４７が反時計方向に回動するので、第２のシャフト部材５０が切欠き５０ａに係合している係合子５１を介して反時計方向に回動する。この第２のシャフト部材５０の反時計方向の回動は、継手部材５３および係合部材４０を介して第１のシャフト部材３２に伝達され、この第１のシャフト部材３２を図２中反時計方向に回動させる。この場合、継手部材５３と第１のシャフト部材３２の中心がずれた状態になっていても、継手部材５３の軸線と第１のシャフト部材３２の軸線が平行であり、係合部材４０、継手部材５３、第２のシャフト部材５０がオルダム継手を構成しているので、第２のシャフト部材５０の回動が確実に第１のシャフト部材３２に伝達される。
【００３７】
リンク部材３１ａ，３０ｃを介してロックカム２９ａが反転胴４の端軸４ａの周りを図中時計方向に回動するので、送りレバー１６のカムフォロア３０ｂに係合する。送りレバー１６はレバー駆動軸１５を回動中心として、図中時計方向に回動し、その状態をロックカム２９ａとカムフォロア３０ｂとの係合で保持されるので、カムフォロア１７が吸口回動カム１８から離間した状態となる。したがって、反転胴４の回転にもかかわらず送りレバー１６が非作動状態となって、吸口８が回動せず静止状態を保ち、片面刷が可能な状態に切り替わる。
【００３８】
このように、ロックカム２９ａを回動させるのに、ロックカム２９ａの移動方向と直交する方向に延在する２本のシャフト部材３２，５０を介して行ったことにより、印刷切替装置を駆動させる第１および第２のエアーシリンダー６０，４４をフレーム４２の外側に設けることができる。したがって、小型の印刷機のようにフレームの内側に駆動装置を設置する空間がない場合にも適用することができる。
【００３９】
なお、本実施の形態では、片面・両面印刷切替時においてシート状物の保持状態を変更させる手段として、紙尻を吸着する吸口８を説明したが、吸口の替わりに紙尻をくわえて反転させるくわえ爪であってもよい。また、継手部材５３の両端を凸条体５３ａと凹溝５３ｂとしたが、これに限定されず、凸条体と凸条体あるいは凹溝と凹溝または凹溝と凸条体としてもよい。
【００４０】
【発明の効果】
以上説明したように本発明によれば、片面・両面刷の切替えが確実に行われるとともに、小型の印刷機にも設置が可能になる。
【図面の簡単な説明】
【図１】本発明に係る反転機構付枚葉輪転印刷機の両面刷状態を示す胴配列図である。
【図２】本発明に係る反転機構付枚葉輪転印刷機において操作側から視た反転胴の側面図である。
【図３】本発明に係る反転機構付枚葉輪転印刷機において反対側から視た反転胴の側面図である。
【図４】本発明に係る反転機構付枚葉輪転印刷機において、吸口と反転爪との動作を説明するための反転胴近傍の側面図である。
【図５】本発明に係る反転機構付枚葉輪転印刷機において、印刷切替装置の駆動装置を展開し一部を破断して示した正面図である。
【図６】図５におけるVI矢視図である。
【図７】本発明に係る反転機構付枚葉輪転印刷機の印刷切替装置の駆動装置において要部を分解して示す模式図である。
【符号の説明】
４…反転胴、８…吸口、１２…上下レバー、１３，１６…カムフォロア、１４…吸口移動カム、１６…送りレバー、１８…吸口回動カム、２９ａ，２９ｂ…ロックカム、３０ａ，３０ｂ…カムフォロア、３２…第１のシャフト部材、４０…係合部材、４４…第２のエアーシリンダー、５０…第２のシャフト部材、５３…継手部材、６０…第１のエアーシリンダー。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a driving device for a print switching device of a sheet-fed rotary printing press with a reversing mechanism that makes a movement of a suction member and a gripping claw that holds and moves the paper bottom during double-sided printing inactive during single-sided printing.
[0002]
[Prior art]
In this type of sheet-fed rotary printing press with a reversing mechanism, the suction member that holds the paper bottom during double-sided printing has a cam follower provided on the suction member side in contact with the first cam as the reversing cylinder rotates. It is configured to move and reverse the paper. On the other hand, since the movement of the suction member becomes unnecessary during single-sided printing, the actuator is operated to bring the second cam into contact with another cam follower provided on the suction member, so that suction is performed despite the rotation of the reversing cylinder. The movement of the member is deactivated.
[0003]
As a driving device of the print switching device of the sheet-fed rotary printing press with a reversing mechanism, there is one disclosed in Japanese Patent Laid-Open No. 10-58654. What has been disclosed here is a suction port that sucks the paper bottom, a suction port moving cam that moves the suction port by contacting a cam follower provided on the suction side, and a suction port drive that is provided outside the bearer of the reversing cylinder A lever and a lock cam that is rotatably supported by the end shaft of the reversing cylinder and that is in contact with a cam follower provided on the suction port driving lever are provided. The lock cam is connected by a link member, and a lever that is swingably supported is pivotally attached to the link member, and both ends of the lever are selectively pressed by pressing members that advance by driving of the air cylinder, thereby The cam follower of the drive lever comes into contact with the lock cam, and maintains the state that the suction port is immersed inside the circumferential surface of the reversing cylinder despite the rotation of the reversing cylinder.
[0004]
[Problems to be solved by the invention]
However, in the drive device for the print switching device of the conventional sheet-fed rotary printing press with a reversing mechanism described above, both ends of the lever are configured to be selectively pressed by pressing members that advance by driving the air cylinder. When the stop position is shifted, the positions of the pressing member and the lever may be shifted. If the positions of the pressing member and the lever are shifted, the lever cannot be rotated by a predetermined amount and the lock cam cannot be moved by a predetermined amount even though the pressing member has advanced by a predetermined amount. For this reason, even if switching to single-sided printing, the suction port could not be immersed in the inner peripheral surface side of the reversing cylinder, and the suction port protruded from the peripheral surface of the reversing cylinder during single-sided printing, and was held by the gripper nail There is a risk that the paper will be damaged by the mouthpiece, causing the machine to malfunction.
[0005]
The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a sheet-fed rotary printing press with a reversing mechanism in which switching between single-sided printing and double-sided printing is reliably performed to prevent machine failure. It is to provide a drive device for a print switching device.
[0006]
[Means for Solving the Problems]
In order to achieve this object, a drive device for a print switching device of a sheet-fed rotary printing press with a reversing mechanism according to the present invention includes a reversing cylinder for reversing a sheet-like material received from a conveying cylinder, and a single-sided / double-sided printing switching A driving device for a print switching device of a sheet-fed rotary printing press with a reversing mechanism having a cam means for changing a holding state of a sheet-like material, the first shaft member connected to the cam means, and an outer side of the frame The first and second actuators supported by the first actuator, the second shaft member supported by the first actuator so as to be able to advance and retreat, and the second actuator to be rotatable, and the second shaft member A joint member that connects the first shaft and the second shaft by advancing is provided, and an Oldham joint is formed by the first shaft, the second shaft, and the joint member. One in which the.
Therefore, when the cam means is operated to switch from double-sided printing to single-sided printing, even if the first shaft member is displaced relative to the second shaft member, the displacement is absorbed via the Oldham coupling. .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cylinder arrangement diagram showing a double-sided printing state of a sheet-fed rotary printing press with a reversing mechanism according to the present invention, and FIG. 3 is a side view of the reversing cylinder as viewed from the driving side, FIG. 4 is a side view of the reversing cylinder for explaining the operation of the suction port and the reversing claw, and FIG. It is the front view shown fractured | ruptured. 6 is a view taken in the direction of arrow VI in FIG. 5, and FIG.
In FIG. 1, printing units adjacent to each other, for example, the second printing unit 2 and the third printing unit 3, include plate cylinders 2a and 3a on which printing plates are mounted, rubber cylinders 2b on which blankets are wound, 3b is in contact with each other, and the first pressure cylinder 2c having a double diameter is in contact with the rubber cylinder 2b of the printing unit 2.
[0008]
Also, the rubber cylinder 3b of the printing unit 3 is in contact with a second pressure cylinder 3c having a double diameter located on the downstream side of the first impression cylinder 2c, and the first impression cylinder 2c, the second impression cylinder 3c, and the like. In between, a double-diameter reversing cylinder 4 is provided so that its circumferential surface is in contact with both pressure cylinders 2c and 3c. A plurality of sets of gripping claw devices 5 (hereinafter referred to as such gripping claw devices), each of which includes a gripping claw and a claw base, and which is opened and closed by a cam mechanism, are divided into two parts in the circumferential direction of the outer periphery of the first impression cylinder 2c. Are simply arranged in the axial direction of the first impression cylinder 2c. In addition, a plurality of sets of gripping claws 6 that are opened and closed by a cam mechanism are juxtaposed in the axial direction of the second impression cylinder 3c at a location where the outer periphery of the second impression cylinder 3c is equally divided into two in the circumferential direction. Yes.
[0009]
Further, at a portion that divides the outer peripheral portion of the reversing cylinder 4 in the circumferential direction, a reversing claw 7 that is opened and closed by a cam mechanism and a plurality of suction ports 8 that are connected to a suction air source such as a pump (not shown). In the case of single-sided printing, the reverse claw 7 is rotated by the first pressure drum 2c, the reverse drum 4, and the second pressure drum 3c. It is positioned so as to correspond to the gripper claw 5 and also to correspond to the gripper claw 6. In the case of the double-sided printing shown in the figure, the paper bottom of the paper 10 held by the gripper nail 5 by the rotation of the first impression cylinder 2c, the reversing cylinder 4 and the second impression cylinder 3c corresponds to the suction mouth 8, and The reversing claw 7 and the gripping claw 6 are positioned so as to correspond to each other.
[0010]
With this configuration, in the case of the double-sided printing shown in the drawing, when the first impression cylinder 2c, the reversing cylinder 4 and the second impression cylinder 3c rotate, the paper 10 conveyed by the gripper nail 5 is conveyed. Is printed on the surface when passing between the rubber cylinder 2b and the first impression cylinder 2c, and the paper 10 has the first impression cylinder 2c, inversion without being replaced by the reversing claw 7, It passes through the contact point of the cylinder 4 and is wound around the lower peripheral surface of the first impression cylinder 2c.
[0011]
When the paper bottom of the wound paper 10 reaches the contact point between the first impression cylinder 2 c and the reversing cylinder 4, the paper bottom is sucked and conveyed by the suction port 8, and the grip end is held by the gripper nail 5 during the conveyance. Released from. The paper bottom of the paper 10 sucked into the suction port 8 is reversed and turned upside down by being transferred to the reversing claw 7, and is reversed from the reversing claw 7 to the holding claw 6 of the second impression cylinder 3 c. And conveyed by the second impression cylinder 3c. The paper 10 to be conveyed is printed on the back surface when passing between the rubber cylinder 3b and the second impression cylinder 3c.
[0012]
In the case of switching from such double-sided printing to single-sided printing, the gripping claw 5 of the first impression cylinder 2c corresponds to the reversing claw 7 of the reversing cylinder 4 with respect to the paper conveyance direction including the first impression cylinder 2c. The phase of the trunk group located upstream is adjusted. When the first impression cylinder 2c, the reversing cylinder 4, the second impression cylinder 3c, and the like rotate in this state, the rubber cylinder 2b of the printing unit 2 and the first impression cylinder are transferred to the paper 10 that is conveyed by the gripper nail 5. When passing between 2c, the second color is printed, and the gripping end of the paper 10 is transferred from the gripping claw 5 to the reversing claw 7 and conveyed while being wound around the lower peripheral surface of the reversing cylinder 4. Is done. The wound paper 10 is transferred from the reversing claw 7 to the holding claw 6 and conveyed, and when it passes between the rubber cylinder 3b and the second impression cylinder 3c of the printing unit 3, it is on the same surface as before. The third color is printed.
[0013]
In the sheet-fed rotary printing press with a reversing mechanism provided with the double-diameter impression cylinders 2c and 3c and the reversing cylinder 4 operating in this way, the suction port 8 as a paper holding mechanism is moved between the operating position and the retracted position. A cam mechanism is provided, and the operation position of these cam mechanisms must be moved to a predetermined position at the time of reverse switching between double-sided printing and single-sided printing.
[0014]
Hereinafter, a cam mechanism for moving the suction port 8 between the operating position and the retracted position will be described with reference to FIGS. 2 and 3.
A pair of upper and lower levers 12 formed in an L-shape are fixed to each of the protruding portions on both ends of the upper and lower lever drive shaft 11 rotatably supported by a bearing provided on a bearer (not shown). Yes. The cam follower 13 provided at one swinging end of the one upper / lower lever 12 is in contact with the large-diameter portion 14a and the small-diameter portion 14b of the suction port moving cam 14 fixed to the frame side (not shown). A pair of feed levers 16 are fixed to each other at the protruding portions at both ends of the feed lever drive shaft 15 rotatably supported by a bearing provided on a bearer (not shown). The cam follower 17 provided at one swinging end of the one feed lever 16 is in contact with the large-diameter portion 18a and the small-diameter portion 18b of the inlet rotation cam 18 fixed to the frame side.
[0015]
As shown in FIG. 3, an L-shaped suction port drive lever 20 connected to the swinging end of the upper and lower lever 12 by a link member (not shown) is provided on the outer side of one bearer of the reversing cylinder 4. ing. The vicinity of the base of the suction port drive lever 20 and the swing end of the feed lever 16 are connected by a link member (not shown). As shown in FIG. 2, on the outside of the other bearer of the reversing cylinder 4, a suction port drive lever 22 and a gear holder 23 that are rotatably provided by a connecting pin 21 at the other swing end of the upper and lower lever 12. Are provided overlapping. The swing end of the feed lever 16 and the suction port drive lever 22 are connected by a link member (not shown).
[0016]
An arc-shaped segment gear 24 is fixed to the outer peripheral portion of the gear holder 23, and an intermediate gear 25 that meshes with the segment gear 24 is rotatably provided at the swing end of the suction port drive lever 22. ing. Between the swinging end of the suction port driving lever 22 and the swinging end of the suction port driving lever 20 provided on one bearer side, a suction shaft 26 having a closed hollow shape at both ends is rotatably supported. Yes. A gear 27 that meshes with the intermediate gear 25 is fixed to the shaft end portion of the suction shaft 26, and a plurality of suction ports 8 are arranged in parallel with the reversing claw 7 in the axial direction. .
[0017]
In such a configuration, when the reversing cylinder 4 rotates and the feed levers 16 on both sides swing due to the height of the suction pivot cam 18, the suction drive levers 20 and 22 connected to the link member (not shown) are connected to the connection pin. The intermediate gear 25 rolls while meshing with the segment gear 24. Therefore, the suction shaft 26 and the suction port 8 are configured to reciprocate in the circumferential direction of the reversing cylinder 4 while rotating by the meshing of the intermediate gear 25 and the gear 27.
[0018]
When the suction port 8 is moved, the pair of upper and lower levers 12 on both sides are swung by the suction port moving cam 14, and the connecting pins 20 a and 21 are moved up and down in the radial direction of the reversal cylinder 4. Accordingly, the suction port drive levers 20 and 22 and the segment gear 24 move up and down together with the suction port 8, and the combined movement with the movement of the reversing cylinder 4 in the circumferential direction results in a solid line and a chain line in FIG. As shown, it is configured to perform an arc motion that exceeds the reversing claw 7 and the claw base 7a.
[0019]
Hereinafter, the operation of the suction port in the double-sided printing in such a configuration will be described with reference to FIG.
When the first impression cylinder 2c, the reversing cylinder 4 and the second impression cylinder 3c are rotated in the direction of the arrow, the paper 10 is wound around the cylinder circumferential surface with the holding edge held by the holding claw 5 of the first impression cylinder 2c. Be transported. After the holding end of the paper 10 reaches the contact point of the first impression cylinder 2c and the reversing cylinder 4, the paper 10 is wound around the lower peripheral surface of the first impression cylinder 2c without being released from the holding of the holding claw 5. . When the paper bottom of the paper 10 wound in this way reaches the contact point of the first impression cylinder 2c and the reversing cylinder 4, that is, the suction port 8 connects the center of the first impression cylinder 2c and the center of the reversing cylinder 4. When reaching the line, the paper bottom is adsorbed to the suction port 8 by the intake air from the intake port.
[0020]
The reversing cylinder 4 continues to rotate with the suction port 8 adsorbing the paper bottom, and the cam followers 17 and 13 on the reversing cylinder 4 side circulate while being pressed against the outer peripheral cam surfaces of the suction rotation cam 18 and the suction moving cam 14. . The suction port 8 is rotated by the action of the suction port rotating cam 18 and moves in the circumferential direction of the reversing cylinder 4, and the contact position of the cam follower 13 with respect to the suction moving cam 14 is moved by the rotation of the reversing cylinder 4. Accordingly, the suction port 8 moves in the radial direction of the reversing cylinder 4 through the swinging of the upper and lower levers 12 and protrudes from the peripheral surface of the reversing cylinder 4. As a result, due to the combined movement with the movement in the circumferential direction, the suction port 8 rotates along the outer peripheral surface of the reversing cylinder 4 while rotating counterclockwise in the drawing as indicated by reference numerals 8A to 8G in FIG. Go around.
[0021]
In this way, the suction port 8 holds the paper bottom and moves to the position indicated by reference numeral 8G, so that the paper 10 is reversed upside down. Until the suction port 8 is located at the contact point between the first impression cylinder 2c and the reversing cylinder 4 and adsorbs the paper bottom, the holding claw 5 of the first impression cylinder 2c is closed and the paper 10 is not released from the holding. At the same time, the suction mouth 8 adsorbs the paper bottom of the paper 10 and the gripper 5 opens to release the paper 10 from the gripper.
[0022]
When the reversing cylinder 4 rotates and the suction port 8 that sucks the paper 10 reaches the position indicated by reference numeral 8G, the suction of the air from the suction port 8 is cut off by the action of the rotary valve, and the suction of the paper 10 is released. At the same time, the paper 10 released from the suction by the suction port 8 is replaced by the holding surface of the reversing claw 7. When the reversing cylinder 4 is further rotated and the reversing claw 7 is opposed to the holding claw 6 of the second impression cylinder 3c, the reversing claw 7 and the holding claw 6 of the second impression cylinder 3c are opened and closed, and the paper 10 is replaced. The paper 10 is printed on the back surface while being transported by the gripping claws 6 of the second impression cylinder 3c. On the other hand, the suction port 8 after passing the paper 10 to the reversing claw 7 at the position indicated by the reference numeral 8G rotates approximately 90 ° until it reaches the contact point between the reversing cylinder 4 and the second impression cylinder 3c, and reversing. Since it moves in the radial direction so as to be immersed from the circumferential surface of the cylinder 4, the suction port 8 does not interfere with the circumferential surface of the second impression cylinder 3c.
[0023]
When the reversing cylinder 4 further rotates, the suction port 8 moves from the contact point of the reversal cylinder 4 and the second pressure drum 3c to the contact point of the both cylinders 4 and 2c. Accordingly, the reversing cylinder 4 moves in the circumferential direction while rotating approximately 360 °. At the same time, the reversing claw 7 is overcome by the action of the suction port moving cam 14, and moves in the radial direction of the reversing cylinder 4 so as to appear and disappear from the peripheral surface of the reversing cylinder 4.
[0024]
Next, a description will be given of a switching device that changes the suction port 8 from the operable state to the non-operational state while the suction port 8 is immersed inside the peripheral surface of the reversal cylinder 4 in spite of the rotation of the reversal cylinder 4 during single-sided printing.
As shown in FIG. 2, a ring member 29 is rotatably provided on one end shaft 4 a of the reversing cylinder 4, and the ring member 29 corresponds to the upper and lower levers 12 and the feed lever 16. Thus, a pair of lock cams 29a and 29b are fixed.
[0025]
Corresponding to these lock cams 29a and 29b, cam followers 30a and 30b are provided at the swinging ends of the upper and lower levers 12 and the feed lever 16, respectively. As shown in FIG. 2, the lock cams 29a and 29b include link members. 30c, 30d (Link member 30d (Not shown) are pivotally attached to one end of these link members 30c, 30d One end of each of link members 31a and 31b (link member 31b is not shown) is pivotally attached to the other end. As will be described later, reference numeral 32 denotes a first shaft member rotatably supported by a bearing portion provided at a side end portion of the reversing cylinder 4, and the other end of the link member 31a is pivotally attached.
[0026]
In such a configuration, as shown in FIG. 2, when the first shaft member 32 is rotated counterclockwise, the link member 31a, 30c Since the lock cam 29a rotates around the end shaft 4a of the reversing cylinder 4 in the clockwise direction in the drawing, the lock cam 29a engages with the cam follower 30b of the feed lever 16. Therefore, the feed lever 16 rotates clockwise with the lever drive shaft 15 as the center of rotation, and this state is held by the engagement of the lock cam 29a and the cam follower 30b. For this reason, the cam follower 17 is separated from the inlet rotation cam 18, and the feed lever 16 is inactivated despite the rotation of the reversing cylinder 4, and the inlet 8 does not rotate and remains stationary.
[0027]
The clockwise rotation of the lock cam 29a causes the lock cam 29b to rotate clockwise via the ring member 29, so that the lock cam 29b engages with the cam follower 30a of the upper and lower levers 12. Therefore, the upper and lower levers 12 are rotated clockwise around the lever drive shaft 11 in the drawing, and the state is held by the engagement between the lock cam 29b and the cam follower 30a. It will be in the state separated from. Therefore, the upper and lower levers 12 are inactivated in spite of the rotation of the reversing cylinder 4, and the suction port 8 is kept inward from the peripheral surface of the reversing cylinder 4, so that single-sided printing is possible. .
The switching device from double-sided printing to single-sided printing described above is not particularly different from the printing switching device of a sheet-fed rotary printing press with a reversing mechanism that has been widely used conventionally.
[0028]
Next, based on FIG. 5 to FIG. 7, the drive device for the print switching device, which is a feature of the present invention, will be described.
In FIG. 5, the first shaft member 32 described above includes a bearing 34 provided in a recess formed at a side end of the reversing cylinder 4 and a bearing 36 provided on a bracket 35 fixed to the side end of the reversing cylinder 4. And is supported rotatably. Reference numeral 37 denotes a position restricting lever that is pivotally attached to the first shaft member 32, and a set screw 38 is screwed to the end portion, and a small ball that is biased in a direction protruding from the tip of the set screw 38 is provided. ing. On the surface of the bracket 35 described above, a pair of recesses into which the small balls are engaged are provided in the rotation direction of the first shaft member 32. By engaging small balls in the pair of recesses, the rotational position of the first shaft member 32 is restricted, and the positions of single-sided printing and double-sided printing are restricted. Reference numeral 40 denotes a disk-like engaging member, and a recess formed at one end is fitted and fixed to the tip of the first shaft member 32 described above, and a groove 40a extending in the radial direction is provided at the other end. As shown in FIG. 7, a chamfered portion 40b is formed at the tip of the groove 40a.
[0029]
Reference numeral 42 denotes a frame in which a through-hole 42a is formed. The through-hole 42a rotates in accordance with this rotation when the reversing cylinder 4 is rotated during single-sided / double-sided printing switching as will be described later. The shaft member 32 is formed at a position corresponding to the turning locus of the shaft member 32. A second air cylinder 44 functioning as a second actuator is pivotally attached to the outside of the frame 42 via a pin 45, and one end of a lever 47 is attached to the tip of a rod 46 of the second air cylinder 44. It is pivotally attached. A cylindrical portion 47 a having a hollow portion 47 b is formed at the other end portion of the lever 47. The cylindrical portion 47 a is rotatably supported by a through hole 42 a drilled in the frame 42, and is penetrated by a retaining member 48. Removal from the hole 42a is restricted.
[0030]
50 is a second shaft member, as shown in FIG. 7, a notch 50 a having a D-shaped cross section is formed at the center, and a protruding strip 50 b having a screw hole 50 c at one end is formed. A cylindrical boss 50d provided with a screw hole protrudes from the other end. One end of the second shaft member 50 is engaged with the hollow portion 47b of the lever 47 described above, and an engagement element 51 fixed to the lever 47 is engaged with the notch 50a. Therefore, when the lever 47 is rotated about the through hole 42 of the frame 42, the second shaft member 50 is also configured to rotate integrally through the engagement element 51. Further, the length of the notch 50a of the second shaft member 50 in the direction of the arrow AB is formed to be larger than the thickness of the engagement element 51, and the second shaft member 50 is moved by the arrow by this length. It is configured to be movable in the A-B direction.
[0031]
53 is a joint member formed in a substantially shaft shape, and as shown in FIG. 7, formed at one end with a width l slightly smaller than the width L of the concave groove 40a of the engaging member 40 described above. Chamfered part 53d A protruding strip body 53a is formed in a protruding manner. The other end is slightly smaller than the width of the protrusion 50b of the second shaft member 50 described above. large A concave groove 53b having a width is formed, and an attachment hole 53c that penetrates in the axial direction and has a large-diameter portion and a small-diameter portion and has a step-like cross section is formed. The joint member 53 is formed by fitting the through bolt 55 into the mounting hole 53 c and screwing the through bolt 55 into the screw hole 50 c of the second shaft member 50, so that the concave groove 53 b becomes the convex strip 50 b of the second shaft member 50. And is supported by the second shaft member 50.
[0032]
By forming the inner diameter of the mounting hole 53c slightly larger than the outer diameter of the through-bolt 55, a gap 56 is formed between the mounting hole 53c and the through-bolt 55, and the joint member 53 is within the mounting hole 53c only by the gap 56. Is supported by the second shaft member 50 so as to be movable. Further, the diameter of the joint member 53 is set to the hollow portion of the lever 47. 47b The coupling member 53 and the hollow part 47b A gap 54 is formed between the joint member 53 and the joint member 53 so as to be movable in the hollow portion 47a. The joint member 53, the engaging member 40, and the second shaft member 50 constitute an Oldham joint.
[0033]
A first air cylinder 60 functions as a first actuator and is fixed to a bracket 58 attached to the frame 42 via a stud bolt 59. A bottomed cylindrical connecting member 61 is attached to the rod 60a of the first air cylinder 60 via a bolt 62. The hole formed in the bottom of the connecting member 61 has the second shaft member 50 described above. A boss 50d is engaged. Bolts 64 are screwed into the bosses 50 d through the washer members 64 interposed between the bosses 50 d and the bottoms of the connecting members 61, and the second shaft members 50 are connected to the rods 60 a through the connecting members 61. It is connected so as to be rotatable.
[0034]
Next, an operation of switching from double-sided printing to single-sided printing in the drive device of the print switching apparatus having such a configuration will be described.
First, the inversion cylinder 4 is rotated by a predetermined angle so that the first shaft member 32 faces the through hole 42a of the frame 42, the first air cylinder 60 is operated, and the rod 60a is moved in the direction of arrow A in FIG. Advance. Since the second shaft member 50 moves in the direction of arrow A via the connecting member 61, the joint member 53 advances from the through hole 42a of the frame 42 to the inside of the frame 42, and the protrusion 53a of the joint member 53 is engaged. It engages in the concave groove 40 a of the joint member 40.
[0035]
Here, when the first shaft member 32 is displaced without facing the through hole 42 a of the frame 42, that is, in FIG. 7, the first shaft member 32 is relative to the second shaft member 50. When the position of the reversal cylinder 4 is displaced in the R direction, which is the circumferential direction, when the second shaft member 50 is moved in the direction of arrow A, the protrusions 53a of the joint member 53 and the engagement member 40 are moved. The concave groove 40b comes into contact with each other. When the second shaft member 50 is further moved in the direction of the arrow A, the joint member 53 is slightly moved in the directions of the arrows X and Y while the chamfered portion 53d of the ridge 53a presses the chamfered portion 40b of the concave groove 40a. To do. Since the width 1 of the ridge 53a is formed slightly smaller than the width L of the groove 40a of the engaging member 40, the ridge 53a engages in the groove 40a.
In this way, even if the first shaft member 32 is displaced without being opposed to the through hole 42a of the frame 42, the displacement is caused by the joint member 53 so that the protrusion 53 is engaged with the recessed groove 40a. Can be absorbed.
[0036]
When the ridge 53a is engaged in the groove 40a, the lever 47 is rotated counterclockwise by operating the second air cylinder 44 and retracting the rod 46 in the direction of arrow D in FIG. The second shaft member 50 is rotated counterclockwise via the engaging member 51 engaged with the notch 50a. The counterclockwise rotation of the second shaft member 50 is transmitted to the first shaft member 32 via the joint member 53 and the engaging member 40, and the first shaft member 32 is counterclockwise in FIG. Rotate in the direction. In this case, even if the center of the joint member 53 and the first shaft member 32 is shifted, the axis of the joint member 53 and the axis of the first shaft member 32 are parallel to each other. Since the member 53 and the second shaft member 50 constitute an Oldham joint, the rotation of the second shaft member 50 is reliably transmitted to the first shaft member 32.
[0037]
Link member 31a, 30c Since the lock cam 29a rotates around the end shaft 4a of the reversing cylinder 4 in the clockwise direction in the drawing, the lock cam 29a engages with the cam follower 30b of the feed lever 16. The feed lever 16 pivots in the clockwise direction in the figure with the lever drive shaft 15 as the pivot center, and the state is held by the engagement of the lock cam 29a and the cam follower 30b. It is in a separated state. Accordingly, the feed lever 16 is inactivated in spite of the rotation of the reversing cylinder 4, so that the suction port 8 does not rotate and remains stationary, so that the single-sided printing is possible.
[0038]
As described above, the rotation of the lock cam 29a is performed through the two shaft members 32 and 50 extending in the direction orthogonal to the moving direction of the lock cam 29a, thereby driving the print switching device. The second air cylinders 60 and 44 can be provided outside the frame 42. Therefore, the present invention can also be applied to a case where there is no space for installing the driving device inside the frame as in a small printing machine.
[0039]
In the present embodiment, the suction port 8 that adsorbs the paper bottom has been described as means for changing the holding state of the sheet-like material at the time of switching between single-sided and double-sided printing. However, instead of the suction port, the paper bottom is added and reversed. A claw may be used. Moreover, although the both ends of the joint member 53 were made into the protruding item | line body 53a and the recessed groove 53b, it is not limited to this, It is good also as a protruding item | line and a protruding item | line or a ditch | groove and a ditch | groove or a ditch | groove and a protruding item | line.
[0040]
【The invention's effect】
As described above, according to the present invention, switching between single-sided printing and double-sided printing can be performed reliably, and installation on a small printing machine is also possible.
[Brief description of the drawings]
FIG. 1 is a cylinder arrangement diagram showing a duplex printing state of a sheet-fed rotary printing press with a reversing mechanism according to the present invention.
FIG. 2 is a side view of a reversing cylinder viewed from the operation side in a sheet-fed rotary printing press with a reversing mechanism according to the present invention.
FIG. 3 is a side view of a reversing cylinder viewed from the opposite side in a sheet-fed rotary printing press with a reversing mechanism according to the present invention.
FIG. 4 is a side view of the vicinity of the reversing cylinder for explaining the operation of the suction port and the reversing claw in the sheet-fed rotary printing press with a reversing mechanism according to the present invention.
FIG. 5 is a front view of a sheet-fed rotary printing press with a reversing mechanism according to the present invention, in which a drive device of a print switching device is developed and a part thereof is broken away.
6 is a view taken along arrow VI in FIG.
FIG. 7 is a schematic diagram showing an essential part in an exploded manner in a drive device of a print switching device of a sheet-fed rotary printing press with a reversing mechanism according to the present invention.
[Explanation of symbols]
4 ... Reverse barrel, 8 ... Suction port, 12 ... Vertical lever, 13, 16 ... Cam follower, 14 ... Suction moving cam, 16 ... Feed lever, 18 ... Suction rotation cam, 29a, 29b ... Lock cam, 30a, 30b ... Cam follower, 32 ... 1st shaft member, 40 ... Engagement member, 44 ... 2nd air cylinder, 50 ... 2nd shaft member, 53 ... Joint member, 60 ... 1st air cylinder.

Claims

搬送胴から受け取ったシート状物を反転させる反転胴と、
片面・両面印刷切替時にシート状物の保持状態を変更させるカム手段を備えた反転機構付枚葉輪転印刷機の印刷切替装置の駆動装置において、
前記カム手段に連結された第１のシャフト部材と、
フレームの外側に支持された第１、第２のアクチュエータと、
この第１のアクチュエータにより進退可能に、かつ第２のアクチュエータにより回動可能に支持された第２のシャフト部材と、
この第２のシャフト部材を進出させることにより、この第２のシャフト部材と前記第１のシャフト部材とを連結する継手部材とを備え、
これら第１のシャフト部材と第２のシャフト部材と継手部材とでオルダム継手を形成したことを特徴とする反転機構付枚葉輪転印刷機の印刷切替装置の駆動装置。An inversion cylinder for inverting the sheet-like material received from the conveyance cylinder;
In the driving device of the printing switching device of the sheet-fed rotary printing press with a reversing mechanism provided with a cam means for changing the holding state of the sheet-like material when switching between single-sided and double-sided printing,
A first shaft member coupled to the cam means;
First and second actuators supported on the outside of the frame;
A second shaft member supported by the first actuator so as to be able to advance and retreat and to be rotatable by the second actuator;
A joint member for connecting the second shaft member and the first shaft member by advancing the second shaft member;
An Oldham coupling is formed by the first shaft member, the second shaft member, and the coupling member, and a drive device for a print switching device of a sheet-fed rotary printing press with a reversing mechanism.

搬送胴から受け取ったシート状物を反転させる吸着部材を備えた反転胴と、
前記吸着部材側に設けたカムフォロアが対接することにより吸着部材を移動させる第１のカムと、
片面・両面印刷切替時に前記吸着部材の移動を非作動にさせる第２のカムとを備えた反転機構付枚葉輪転印刷機の印刷切替装置の駆動装置において、
前記第２のカムにレバーを介して連結された第１のシャフト部材と、
フレームの外側に支持された第１、第２のアクチュエータと、
この第１のアクチュエータにより進退可能に、かつ第２のアクチュエータにより回動可能に支持された第２のシャフト部材と、
この第２のシャフト部材を進出させることにより、この第２のシャフト部材と前記第１のシャフト部材とを連結する継手部材とを備え、
これら第１のシャフト部材と第２のシャフト部材と継手部材とでオルダム継手を形成したことを特徴とする反転機構付枚葉輪転印刷機の印刷切替装置の駆動装置。A reversing cylinder having a suction member that reverses the sheet-like material received from the conveying cylinder;
A first cam that moves the suction member by contacting a cam follower provided on the suction member side;
In a drive device for a print switching device of a sheet-fed rotary printing press with a reversing mechanism, comprising a second cam that deactivates the movement of the suction member when switching between single-sided and double-sided printing,
A first shaft member coupled to the second cam via a lever;
First and second actuators supported on the outside of the frame;
A second shaft member supported by the first actuator so as to be able to advance and retreat and to be rotatable by the second actuator;
A joint member for connecting the second shaft member and the first shaft member by advancing the second shaft member;
An Oldham coupling is formed by the first shaft member, the second shaft member, and the coupling member, and a drive device for a print switching device of a sheet-fed rotary printing press with a reversing mechanism.