JP4354053B2 - Printing device and drying device - Google Patents

Description

【００４１】
例えば、印刷速度が５速で、乾燥度合いが“強”の場合には、制御装置（給紙モード切替手段）８により切り替えられたスキップ給紙モードのスキップ回数は８回となる。
【００４２】
孔版印刷装置１の給紙モードがスキップ給紙モードに切り替えられ、例えば、スキップ回数がＮ回とされた場合には、排紙口１１から排紙される印刷済用紙９ａの排紙間隔時間（用紙先端検知センサ２２がＯＮになってから、用紙先端検知センサ２２が再びＯＮになるまでの時間：ＰＴ）が通常の給紙モードで給紙が行われたときのＮ倍となる。つまり、乾燥装置１６内での印刷済用紙９ａの搬送速度を、通常の給紙モードで給紙が行われたときの１／Ｎの速度で搬送させても、後続の印刷済用紙９ａがぶつかって紙詰まりすることが防止される。
【００４３】
したがって、孔版印刷装置１の給紙モードが制御装置（給紙モード切替手段）８によりスキップ給紙モードに切り替えられ、そのときのスキップ回数がＮ回に切り替えられた場合には、乾燥装置１６内の印刷済用紙９ａの搬送速度が、印刷速度とスキップ回数とに応じて後続の印刷済用紙９ａがぶつかって紙詰まりしない範囲で低速に制御装置（乾燥促進手段）２６により切り替えられる。このため、遠赤外線ヒータ２５による印刷済用紙９ａの乾燥時間が長くなり、印刷済用紙９ａの乾燥が促進される。しかも、この印刷済用紙９ａの乾燥促進を、乾燥装置１６を大型にすることなく行える。
【００４４】
表２は、印刷速度と、スキップ回数と、排紙間隔時間ＰＴとの具体例を示している。
【００４５】
【表２】

【００４６】
例えば、印刷速度が５速で、スキップ回数が５回の場合には、排紙間隔時間ＰＴが２.５秒となり、乾燥装置１６内での印刷済用紙９ａの乾燥時間を２.５秒弱確保することができ、乾燥装置１６内を通過する時間が２.５秒弱となる程度に印刷済用紙９ａの搬送速度を低速にすることができる。このため、従来例において説明したように、略同じ印刷速度で通常給紙モードで給紙しながら印刷した場合の乾燥時間が０.３秒程度である場合に比べて、乾燥時間を大幅に長くすることができ、印刷済用紙９ａの乾燥を促進させることができる。
【００４７】
なお、本実施の形態では、乾燥装置１６がＯＮ（より正確には、遠赤外線ヒータ２５がＯＮ）にされることに伴い制御装置８によりスキップ給紙モードに切り替えられる場合を例に挙げて説明したが、操作パネル２９上の給紙モード切替キーでスキップ給紙モードを選択することに伴い、制御手段として機能する制御装置８により乾燥装置１６をＯＮ（より正確には、遠赤外線ヒータ２５をＯＮ）にしてもよい。
【００４８】
また、本実施の形態では、乾燥装置１６の制御装置（乾燥促進手段）２６が、孔版印刷装置１内での印刷速度とスキップ給紙時のスキップ回数とに応じて、乾燥装置１６内での印刷済用紙９ａの搬送速度を低速に切り替える場合を例に挙げて説明したが、制御装置（乾燥促進手段）２６が、孔版印刷装置１内での印刷速度とスキップ回数とのいずれか一方に応じて印刷済用紙９ａの搬送速度を低速に切り替えるようにしてもよい。
【００４９】
つぎに、本発明の第２の実施の形態を図３に基づいて説明する。なお、本実施の形態は、外観上の構成、制御系の構成に関しては図１及び図２に示した第１の実施の形態と同じであり、これらの図１及び図２を援用して説明する。
【００５０】
本実施の形態が第１の実施の形態と異なる点は、制御装置２６が、孔版印刷装置１内での印刷速度とスキップ給紙時のスキップ回数とに応じて、印刷済用紙９ａを遠赤外線ヒータ２５に対向する位置で所定時間停止させる乾燥促進手段として機能する点である。
【００５１】
図３は、用紙先端検知センサ２２のＯＮ，ＯＦＦと、搬送ベルト１８の搬送速度との関係を示すタイミングチャートである。なお、搬送ベルト１８が印刷済用紙９ａを搬送しているときの搬送速度はＶ２であり、この搬送速度Ｖ２は、吸着搬送ユニット７の搬送速度Ｖ１に対して５０〜７０％の値に設定されている。
【００５２】
搬送ベルト１８の制御は、用紙先端検知センサ２２がＯＦＦになったタイミングでベルト駆動モータ２１への通電が遮断され、ベルト駆動モータ２１が所定時間（停止時間：Ｔ）停止された後に通電が再開される。この停止時間Ｔは、通電を再開してから用紙先端検知センサ２２がＯＮになるまでに微小時間ｔが得られるように設定されている。
【００５３】
この停止時間Ｔについては、印刷速度が５速で、スキップ回数が５回の場合には、排紙間隔時間ＰＴが２.５秒であることから（表２参照）、この排紙間隔時間ＰＴより少し短い時間、例えば約２秒となる。
【００５４】
このような構成において、乾燥装置１６内を搬送される印刷済用紙９ａが遠赤外線ヒータ２５に対向する位置で約２秒間停止されるので、十分な乾燥時間を確保することができ、印刷済用紙９ａの乾燥を促進させることができる。
【００５５】
なお、本実施の形態では、用紙先端検知センサ２２がＯＦＦになったタイミングでベルト駆動モータ２１への通電を遮断する場合を例に挙げて説明したが、用紙先端検知センサ２２がＯＮになった後、所定搬送距離に相当するパルス分だけベルト駆動モータ２１を駆動させ、その後にベルト駆動モータ２１への通電を遮断するようにしてもよい。
【００５６】
また、本実施の形態では、乾燥装置１６の制御装置（乾燥促進手段）２６が、孔版印刷装置１内での印刷速度とスキップ給紙時のスキップ回数とに応じて、印刷済用紙９ａを遠赤外線ヒータ２５に対向する位置で所定時間停止させる場合を例に挙げて説明したが、制御装置（乾燥促進手段）２６が、孔版印刷装置１内での印刷速度とスキップ回数とのいずれか一方に応じて印刷済用紙９ａを遠赤外線ヒータ２５に対向する位置で所定時間停止させるようにしてもよい。
【００５７】
つぎに、本発明の第３の実施の形態を図４に基づいて説明する。なお、図１及び図２において説明した部分と同じ部分は同じ符号で示し、説明も省略する（以下、同様）。本実施の形態の印刷装置である孔版印刷装置３４には、外装部材として本体ケース３５が設けられている。この本体ケース３５内には、版胴３、プレスローラ４、製版部６、ＣＰＵやＲＯＭ及びＲＡＭなどを備えて孔版印刷装置３４の各種動作を制御する制御装置３６等が設けられている。さらに、印刷済用紙９ａを乾燥させる乾燥ユニット３７が本体ケース３５内に設けられ、本体ケース３５の一方の側面部には排紙台２７が取り付けられている。
【００５８】
乾燥ユニット３７は、印刷済用紙９ａを搬送する搬送ベルト１８、搬送ベルト１８を支持する２個のローラ１９，２０、一方のローラ２０を回転駆動させベルト駆動モータ２１、印刷済用紙９ａを検知する用紙検知センサ３８、搬送ベルト１８で搬送される印刷済用紙９ａを搬送ベルト１８に吸着させるエア吸引器２４、搬送ベルト１８で搬送される印刷済用紙９ａを乾燥させる乾燥手段である遠赤外線ヒータ２５等により構成されている。
【００５９】
制御装置３６は、乾燥ユニット３７がＯＮ（より正確には、遠赤外線ヒータ２５がＯＮ）にされることに伴い給紙モードをスキップ給紙モードに切り替える給紙モード切替手段として機能し、給紙モード切替手段によりスキップ給紙モードに切り替えられた場合には、そのときの印刷速度や乾燥度合いに応じて異なるスキップ回数に切り替えられる。また、制御装置３６は、孔版印刷装置３４内での印刷速度とスキップ給紙時のスキップ回数とに応じて、印刷済用紙９ａの搬送速度を低速に切り替える乾燥促進手段として機能する。
【００６０】
このような構成において、印刷が行われた印刷済用紙９ａを乾燥ユニット３７で乾燥させる場合には、乾燥ユニット３７の電源スイッチ（より正確には、遠赤外線ヒータ２５の電源スイッチ）をＯＮにする。すると、孔版印刷装置３４の給紙モードが制御装置（給紙モード切替手段）３６によりスキップ給紙モードに切り替えられる。さらに、そのスキップ給紙モードのスキップ回数がＮ回に切り替えられた場合には、制御装置（乾燥促進手段）３６により印刷速度とスキップ回数Ｎとに応じて印刷済用紙９ａの搬送速度が切り替えられ、遠赤外線ヒータ２５に対向して搬送される印刷済用紙９ａの搬送速度が、後続の印刷済用紙９ａがぶつかって紙詰まりしない範囲で低速になる。このため、遠赤外線ヒータ２５による印刷済用紙９ａの乾燥時間が長くなり、印刷済用紙９ａの乾燥が促進される。しかも、この印刷済用紙９ａの乾燥促進を、乾燥ユニット３７や孔版印刷装置３４を大型にすることなく行える。
【００６１】
なお、本実施の形態では、乾燥ユニット３７がＯＮ（より正確には、遠赤外線ヒータ２５がＯＮ）にされることに伴い制御装置３６によりスキップ給紙モードに切り替えられる場合を例に挙げて説明したが、操作パネル２９の給紙モード切替キーでスキップ給紙モードを選択することに伴い、制御手段として機能する制御装置３６により乾燥ユニット３７をＯＮ（より正確には、遠赤外線ヒータ２５をＯＮ）にしてもよい。
【００６２】
また、本実施の形態では、制御装置（乾燥促進手段）３６が、孔版印刷装置３４内での印刷速度とスキップ給紙時のスキップ回数とに応じて、孔版印刷装置３４内での印刷済用紙９ａの搬送速度を低速に切り替える場合を例に挙げて説明したが、制御装置（乾燥促進手段）３６が、孔版印刷装置３４内での印刷速度とスキップ回数とのいずれか一方に応じて印刷済用紙９ａの搬送速度を低速に切り替えるようにしてもよい。
【００６３】
つぎに、本発明の第４の実施の形態を説明する。本実施の形態は、外観上の構成に関しては図４に示した第３の実施の形態と同じであり、図４を援用して説明する。
【００６４】
本実施の形態が第３の実施の形態と異なる点は、制御装置（乾燥促進手段）３６の制御形態であり、印刷速度とスキップ給紙時のスキップ回数とに応じて、印刷済用紙９ａを遠赤外線ヒータ２５に対向する位置で所定時間停止させる点である。
【００６５】
印刷済用紙９ａが遠赤外線ヒータ２５に対向する位置で停止する停止時間Ｔは、第２の実施の形態の場合と略同じであり、例えば、印刷速度が５速で、スキップ回数が５回の場合には約２秒となる。
【００６６】
このような構成において、用紙検知センサ３８が印刷済用紙９ａの後端を検出したらすぐにベルト駆動モータ２１への通電が遮断され、印刷済用紙９ａが遠赤外線ヒータ２５に対向する位置で約２秒間停止される。このため、印刷済用紙９ａを乾燥させるための乾燥時間を十分に確保することができ、印刷済用紙９ａの乾燥を促進させることができる。
【００６７】
なお、本実施の形態では、制御装置（乾燥促進手段）３６が、孔版印刷装置３４内での印刷速度とスキップ給紙時のスキップ回数とに応じて、印刷済用紙９ａを遠赤外線ヒータ２５に対向する位置で所定時間停止させる場合を例に挙げて説明したが、制御装置（乾燥促進手段）３６が、孔版印刷装置３４内での印刷速度とスキップ回数とのいずれか一方に応じて印刷済用紙９ａを遠赤外線ヒータ２５に対向する位置で所定時間停止させるようにしてもよい。
【００６８】
つぎに、本発明の第５の実施の形態を図５に基づいて説明する。本実施の形態の基本的構造は図１に示した第１の実施の形態と略同じであり、孔版印刷装置１と、孔版印刷装置１の本体ケース２の側方であって排紙口１１に対向する位置に配置された乾燥装置３９とよりなる。乾燥装置３９の本体ケース４０内には、印刷済用紙９ａを搬送する搬送ベルト１８、ベルト駆動モータ２１、用紙先端検知センサ２２、搬送ベルト１８の裏面側に等ピッチで＋と−とが交互に配列された乾燥手段である多数の電極４１、高周波発生電源４２、ＣＰＵやＲＯＭ及びＲＡＭなどを備えて乾燥装置３９の各種動作を制御する制御装置４３等が設けられている。搬送ベルト１８は非導電性に形成され、電極４１は高周波誘電により印刷済用紙９ａ表面の水分を加熱することにより印刷済用紙９ａの乾燥を促進する。制御装置４３は、孔版印刷装置１内での印刷速度とスキップ給紙時のスキップ回数とに応じて、印刷済用紙９ａの搬送速度を低速に切り替える乾燥促進手段として機能する。
【００６９】
このような構成において、孔版印刷装置１内で印刷が行われた印刷済用紙９ａを乾燥装置３９内で乾燥させる場合には、乾燥装置３９の電源スイッチ（より正確には、電極４１の電源スイッチ）をＯＮにする。すると、孔版印刷装置１の給紙モードが制御装置（給紙モード切替手段）８によりスキップ給紙モードに切り替えられる。
【００７０】
さらに、孔版印刷装置１の給紙モードがスキップ給紙モードに切り替えられることにより、そのときの印刷速度とスキップ回数とにより制御装置（乾燥促進手段）４３により印刷済用紙９ａの搬送速度が切り替えられ、搬送ベルト１８上を搬送される印刷済用紙９ａの搬送速度が、後続の印刷済用紙９ａがぶつかって紙詰まりしない範囲で低速になる。このため、電極４１から発生する高周波誘電による印刷済用紙９ａの乾燥時間が長くなり、印刷済用紙９ａの乾燥が促進される。
【００７１】
なお、本実施の形態では、印刷済用紙９ａの乾燥促進のための制御装置（乾燥促進手段）４３による制御として、搬送速度を低速にする場合を例に挙げて説明したが、搬送ベルト１８上で所定時間停止させることにより乾燥を促進させるようにしてもよい。
【００７２】
また、上述した各実施の形態において、給紙モード切替手段と乾燥促進手段について、ソフトウェア上の処理により切り替える構造を例に挙げて説明したが、機械的にスイッチを切り替える構造としてもよい。
【００７３】
【発明の効果】
請求項１記載の発明の印刷装置によれば、乾燥装置により印刷済用紙を乾燥させる場合には、乾燥装置をＯＮにすると、給紙モードが給紙モード切替手段によりスキップ給紙モードに切り替えられ、印刷用紙の給紙間隔が長くなり、排紙口からの印刷済用紙の排紙間隔が長くなるので、乾燥装置内における印刷済用紙の搬送速度を、後続の印刷済用紙がぶつかって紙詰まりしない範囲で低速にすることができ、印刷済用紙の搬送速度を低速にすることにより乾燥装置を大型にすることなく印刷済用紙の乾燥時間を長くすることができ、印刷済用紙の乾燥促進を図ることができる。
【００７４】
請求項２記載の発明の印刷装置によれば、印刷装置の排紙口に対向する位置に乾燥装置を取り付けた後に印刷装置の給紙モードとしてスキップ給紙モードを選択すると、乾燥装置がＯＮになるので、印刷済用紙の乾燥促進を図ることができる。
【００７５】
請求項３記載の発明の印刷装置によれば、乾燥ユニットにより印刷済用紙を乾燥させる場合には、乾燥ユニットをＯＮにすると、給紙モードが給紙モード切替手段によりスキップ給紙モードに切り替えられ、印刷用紙の給紙間隔が長くなるので、乾燥ユニットで乾燥させるときの印刷済用紙の搬送速度を、後続の印刷済用紙がぶつかって紙詰まりしない範囲で低速にすることができ、印刷済用紙の搬送速度を低速にすることにより乾燥ユニットを大型にすることなく印刷済用紙の乾燥時間を長くすることができ、印刷済用紙の乾燥促進を図ることができる。
【００７６】
請求項４記載の発明の印刷装置によれば、印刷装置の給紙モードとしてスキップ給紙モードを選択すると、乾燥ユニットがＯＮになるので、印刷済用紙の乾燥促進を図ることができる。
【００７７】
請求項５記載の発明の印刷装置によれば、印刷速度が高速の場合にはスキップ回数が多くなるとともに印刷速度が低速の場合にはスキップ回数が少なくなるので、印刷速度が異なる場合でも印刷用紙の給紙間隔が同じになり、印刷速度が異なる場合でも乾燥装置又は乾燥ユニットによる乾燥時には印刷済用紙を同じように低速で搬送させることができ、印刷済用紙の乾燥促進を図ることができる。
【００７８】
請求項６記載の発明の印刷装置によれば、乾燥度合いを強くした場合にはスキップ回数が多くなって印刷用紙の給紙間隔が長くなり、乾燥度合いを弱くした場合にはスキップ回数が少なくなって印刷用紙の給紙間隔が短くなるので、乾燥度合いを強くした場合には乾燥装置又は乾燥ユニットによる乾燥時の印刷済用紙の搬送速度を低速にすることができ、乾燥度合いを弱くした場合には乾燥装置又は乾燥ユニットによる乾燥時の印刷済用紙の搬送速度を高速にすることができ、これにより、乾燥度合いを強くした場合には乾燥時間を長くすることができ、乾燥度合いを弱くした場合には乾燥時間を短くすることができ、印刷済用紙を希望する乾燥度合いに乾燥させることができる。
【００７９】
請求項７記載の発明の印刷装置によれば、印刷箇所を通過した印刷済用紙が乾燥ユニットに到達する時間的間隔は、印刷速度とスキップ回数との少なくともいずれか一方に応じて決まるので、乾燥手段に対向する位置での印刷済用紙の搬送速度を、印刷速度やスキップ回数に応じて後続の印刷済用紙がぶつかって紙詰まりしない範囲で低速に乾燥促進手段で切り替えることにより、乾燥手段による印刷済用紙の乾燥時間が長くなり、乾燥ユニットを大型にすることなく印刷済用紙の乾燥を促進させることができる。
【００８０】
請求項８記載の発明の印刷装置によれば、印刷箇所を通過した印刷済用紙が乾燥ユニットに到達する時間的間隔は、印刷速度とスキップ回数との少なくともいずれか一方に応じて決まるので、印刷速度やスキップ回数に応じて後続の印刷済用紙がぶつかって紙詰まりしない範囲の所定時間、印刷済用紙を乾燥手段に対向する位置で乾燥促進手段によって停止させることにより、印刷済用紙の乾燥時間が長くなり、乾燥ユニットを大型にすることなく印刷済用紙の乾燥を促進させることができる。
【００８１】
請求項９記載の発明の乾燥装置によれば、印刷装置の排紙口から乾燥装置内へ排紙される印刷済用紙の時間的間隔は、印刷速度とスキップ回数との少なくともいずれか一方に応じて決まるので、乾燥装置内での印刷済用紙の搬送速度を、印刷速度やスキップ回数に応じて後続の印刷済用紙がぶつかって紙詰まりしない範囲で低速に乾燥促進手段で切り替えることにより、乾燥装置内での印刷済用紙の乾燥時間が長くなり、乾燥装置を大型にすることなく印刷済用紙の乾燥を促進させることができる。
【００８２】
請求項１０記載の発明の乾燥装置によれば、印刷装置の排紙口から乾燥装置内へ排紙される印刷済用紙の時間的間隔は、印刷速度とスキップ回数との少なくともいずれか一方に応じて決まるので、印刷速度やスキップ回数に応じて後続の印刷済用紙がぶつかって紙詰まりしない範囲の所定時間、印刷済用紙を乾燥装置内で乾燥促進手段によって停止させることにより、乾燥装置内での印刷済用紙の乾燥時間が長くなり、乾燥装置を大型にすることなく印刷済用紙の乾燥を促進させることができる。
【図面の簡単な説明】
【図１】本発明の第１の実施の形態における孔版印刷装置と乾燥装置とを示す縦断正面図である。
【図２】孔版印刷装置と乾燥装置との制御系を示すブロック図である。
【図３】本発明の第２の実施の形態における、用紙先端検知センサのＯＮ，ＯＦＦと、搬送ベルトの搬送速度との関係を示すタイミングチャートである。
【図４】本発明の第３の実施の形態の孔版印刷装置を示す縦断正面図である。
【図５】本発明の第５の実施の形態における孔版印刷装置と乾燥装置とを示す縦断正面図である。
【符号の説明】
１，３４ 印刷装置
２ 本体ケース
８ 給紙モード切替手段、制御手段
９ 印刷用紙
９ａ 印刷済用紙
１１ 排紙口
１５ 印刷箇所
１６，３９ 乾燥装置
２５，４１ 乾燥手段
２６，４３ 乾燥促進手段
３５ 本体ケース
３６ 給紙モード切替手段、制御手段、乾燥促進手段
３７ 乾燥ユニット[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a printing apparatus that promotes drying of ink on a printing surface of printed paper, and a drying apparatus that is used by being attached to the printing apparatus.
[0002]
[Prior art]
Conventionally, an emulsion ink is used in a printing apparatus such as a stencil printing apparatus, and this emulsion ink has a characteristic that it is difficult to dry. For this reason, when printed paper printed using this emulsion ink (hereinafter simply referred to as ink) is discharged and stacked on a paper discharge tray, the ink on the printing surface is superimposed on the printed paper. A “show-through” occurs that transfers to the back of another printed sheet. Further, when the operator removes and aligns the printed sheets immediately after being discharged, “hand-rubbing stains” that stain the fingers with the ink on the printing surface occur. In addition, when double-sided printing or multi-color printing is performed again on printed paper, ink adheres to the paper feed roller or transport roller, and the ink is transferred onto the printed surface of the printed paper. “Rolling stains” occur.
[0003]
In view of this, it has been considered that a drying device is connected online to the printing device, or a drying unit is provided in the printing device, and the ink on the printed paper is dried by the drying device or the drying unit.
[0004]
[Problems to be solved by the invention]
However, the printing speed of the printing apparatus is high, printing is performed on a maximum of 120 sheets / minute on A3 size printing paper, and the discharge speed of printed paper is about 80 m / min. For this reason, when the drying area (for example, the length of the heater) of the drying apparatus or the drying unit is set to 400 mm, the printed paper passes through the drying area in 0.3 seconds. It cannot be dried.
[0005]
Although it is possible to increase the drying effect of printed paper by increasing the output of the drying device or drying unit or extending the drying area, the drying device or drying unit becomes larger and expensive, Power consumption increases.
[0006]
On the other hand, if the printing speed is reduced, the time for the printed paper to pass through the dry area can be lengthened. However, if the printing speed is greatly reduced, the amount of ink transferred to the printed paper at the time of printing increases. It becomes difficult to dry.
[0007]
Therefore, the present invention provides a printing apparatus and a drying apparatus that can promote drying of printed paper without increasing the size of a drying apparatus provided in the printing apparatus or a drying unit installed in the printing apparatus. Objective.
[0008]
[Means for Solving the Problems]
According to the first aspect of the present invention, a drying device that dries printed paper discharged from a paper discharge port formed in the main body case can be attached at a position facing the paper discharge port, and the printing paper can be attached to a printing location. In the printing apparatus having the skip sheet feeding mode as the sheet feeding mode for feeding toward the paper, the sheet feeding mode is automatically set when the drying device attached to the position facing the sheet discharge port is turned on. Paper feed mode switching means for switching to the skip paper feed mode is provided.
[0009]
Here, the skip paper feed mode is a paper feed mode in which the number of paper feeds is less than the number of rotations of the plate cylinder. In the normal sheet feeding mode, one sheet feeding is performed per one rotation of the plate cylinder, whereas in the skip sheet feeding mode in which the number of skips is N, one sheet feeding is performed every N rotations of the plate cylinder. Done.
[0010]
Therefore, when drying the printed paper by the drying device, when the drying device is turned on, the paper feeding mode is switched to the skip paper feeding mode by the paper feeding mode switching means, and the paper feeding interval of the printing paper becomes longer, The paper discharge interval of the printed paper from the paper discharge port becomes longer. For this reason, the conveyance speed of the printed paper in the drying device can be reduced within a range where the subsequent printed paper does not collide with the printed paper, and the drying device can be reduced by reducing the conveyance speed of the printed paper. The drying time of the printed paper can be extended without increasing the size, and drying of the printed paper can be promoted.
[0011]
According to a second aspect of the present invention, a drying device for drying printed paper ejected from a paper ejection port formed in the main body case is attachable to a position facing the paper ejection port, and the printing paper is printed at a printing location. In the printing apparatus having the skip sheet feeding mode as the sheet feeding mode for feeding toward the printer, the drying apparatus attached to the position facing the sheet discharge port is turned on when the skip sheet feeding mode is selected. Control means.
[0012]
Therefore, if the skip paper feed mode is selected as the paper feed mode of the printing apparatus after the drying apparatus is attached at a position facing the paper discharge port of the printing apparatus, the drying apparatus is turned on to promote drying of printed paper. Can do.
[0013]
According to a third aspect of the present invention, there is provided a drying unit for drying printed paper after printing is provided in the main body case, and printing having a skip paper feeding mode as a paper feeding mode for feeding the printing paper toward a printing location. The apparatus includes a paper feed mode switching unit that automatically switches the paper feed mode to the skip paper feed mode when the drying unit is turned on.
[0014]
Accordingly, when the printed paper is dried by the drying unit, when the drying unit is turned on, the paper feed mode is switched to the skip paper feed mode by the paper feed mode switching means, and the paper feed interval of the print paper is lengthened. For this reason, the transport speed of the printed paper when drying with the drying unit can be reduced within a range where the subsequent printed paper does not collide with the printed paper, and the transport speed of the printed paper is reduced. The drying time of the printed paper can be extended without increasing the size of the drying unit, and the drying of the printed paper can be promoted.
[0015]
According to a fourth aspect of the present invention, there is provided a drying unit for drying printed paper after printing is provided in the main body case, and printing having a skip paper feeding mode as a paper feeding mode for feeding the printing paper toward a printing location. The apparatus includes a control unit that turns on the drying unit when the skip sheet feeding mode is selected.
[0016]
Therefore, when the skip paper feed mode is selected as the paper feed mode of the printing apparatus, the drying unit is turned on, and drying of the printed paper can be promoted.
[0017]
According to a fifth aspect of the present invention, in the printing apparatus according to the first or third aspect, the printing speed when printing on the printing paper can be switched, and when the printing speed is high, the skip count is increased. When the printing speed is low, the number of skips is switched by the paper feed mode switching means so as to reduce the number of skips.
[0018]
Accordingly, when the printing speed is high, the number of skips increases, and when the printing speed is low, the number of skips decreases. Therefore, even when the printing speed is different, the printing paper feed interval is the same. For this reason, even when the printing speed is different, the printed paper can be conveyed at the same low speed when drying by the drying device or the drying unit, and drying of the printed paper can be promoted.
[0019]
According to a sixth aspect of the present invention, in the printing apparatus according to the first or third aspect, the degree of drying of the printed paper by the drying apparatus or the drying unit can be switched, and when the degree of drying is strong, the skip count is increased. When the degree of drying is weak, the skip count is switched by the paper feed mode switching means so as to reduce the skip count.
[0020]
Accordingly, when the degree of drying is increased, the number of skips is increased and the printing paper feed interval is increased, and when the degree of drying is decreased, the number of skips is decreased and the printing paper feeding interval is shortened. For this reason, when the paper feed interval becomes longer due to the increased degree of drying, the transport speed of the printed paper during drying can be reduced accordingly, and the paper feed interval becomes shorter due to the lower degree of dryness. If this happens, the transport speed of the printed paper during drying can be increased accordingly. As a result, when the degree of drying is increased, the drying time can be lengthened, and when the degree of drying is decreased, the drying time can be shortened, and the printed paper can be dried to a desired degree of drying. it can.
[0021]
According to the seventh aspect of the present invention, a drying unit including a drying unit that dries the printed paper facing the printed paper that has been printed is provided in the main body case, and the printing paper is fed toward the printing location. In a printing apparatus that has a skip paper feed mode as a paper feed mode, and the printing speed can be switched when printing on the printing paper, the printing speed and the number of skips when feeding in the skip paper feed mode In accordance with at least one of them, there is provided a drying accelerating unit that switches a conveyance speed of the printed paper at a position facing the drying unit to a low speed.
[0022]
Therefore, the time interval at which the printed paper that has passed through the printing portion reaches the drying unit is determined according to at least one of the printing speed and the number of skips, so that the printed paper at the position facing the drying means By switching the transport speed to a low speed within the range where the subsequent printed paper hits and does not clog according to the printing speed and skip count, the drying time of the printed paper becomes longer and the drying unit becomes larger. The drying of the printed paper can be promoted without doing so.
[0023]
According to the eighth aspect of the present invention, a drying unit including a drying unit that dries the printed paper facing the printed paper that has been printed is provided in the main body case, and the printing paper is fed toward the printing location. In a printing apparatus that has a skip paper feed mode as a paper feed mode, and the printing speed can be switched when printing on the printing paper, the printing speed and the number of skips when feeding in the skip paper feed mode In accordance with at least one of the above, there is provided a drying promoting means for stopping the printed paper at a position facing the drying means for a predetermined time.
[0024]
Therefore, the time interval for the printed paper that has passed through the printing location to reach the drying unit is determined according to at least one of the printing speed and the number of skips. By stopping the printed paper by the drying promoting means at a position facing the drying means for a predetermined time in a range where the paper does not collide with the paper, the drying time of the printed paper becomes longer, and the drying unit is not enlarged. Drying of printed paper can be promoted.
[0025]
According to a ninth aspect of the present invention, there is provided a drying device which is attached to a position facing a paper discharge port formed in a main body case of the printing apparatus and which dries printed paper discharged from the paper discharge port. Drying promoting means for switching the transport speed of the printed paper to a low speed according to at least one of the printing speed in the printer and the number of skips at the time of skip feeding in the printing apparatus.
[0026]
Therefore, the time interval of the printed paper discharged from the discharge port of the printing device into the drying device is determined according to at least one of the printing speed and the number of skips. The drying time of the printed paper in the drying device is increased by switching the paper conveyance speed to a low speed within the range where the subsequent printed paper collides with the printing speed and the number of skips so that it does not clog. Thus, drying of printed paper can be promoted without increasing the size of the drying device.
[0027]
According to a tenth aspect of the present invention, the printed paper is attached to a position facing the paper discharge port formed in the main body case of the printing apparatus, and the printed paper is dried facing the printed paper discharged from the paper discharge port. In the drying apparatus having a drying means for causing the printing paper to face the drying means in accordance with at least one of a printing speed in the printing apparatus and a skip count at the time of skip feeding in the printing apparatus A drying accelerating means for stopping at a position for a predetermined time.
[0028]
Therefore, the time interval between the printed sheets discharged from the discharge port of the printing apparatus into the drying apparatus is determined according to at least one of the printing speed and the number of skips. If the printed paper is stopped by the drying promoting means in the drying device for a predetermined time in the range where the subsequent printed paper does not collide, the drying time of the printed paper in the drying device will be longer and dry. Drying of printed paper can be promoted without increasing the size of the apparatus.
[0029]
DETAILED DESCRIPTION OF THE INVENTION
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a longitudinal front view showing a stencil printing apparatus and a drying apparatus. A stencil printing apparatus 1 as a printing apparatus is provided with a main body case 2 as an exterior member. In the main body case 2, there are a porous cylindrical plate cylinder 3 that is driven to rotate about an axis, a press roller 4 that is movable to a position close to and away from the outer peripheral surface of the plate cylinder 3, and an outer peripheral surface of the plate cylinder 3. There are provided a plate making unit 6 for making a master 5 wound around, a suction conveyance unit 7, a control device 8 for controlling various operations of the stencil printing apparatus 1 including a CPU, a ROM and a RAM. Further, a paper feed tray 10 on which the printing paper 9 is loaded is attached to one side surface portion of the main body case 2, and a paper discharge port 11 is formed on the other side surface portion of the main body case 2.
[0030]
Inside the plate cylinder 3, there is a minute gap between the ink pipe 12 serving as a support shaft that is positioned on the axis of the plate cylinder 3 and rotatably supports the plate cylinder 3, and the inner peripheral surface of the plate cylinder 3. An ink roller 13 that is rotationally driven in the same direction as the plate cylinder 3, a doctor roller 14 that is disposed with a small gap between the outer peripheral surface of the ink roller 13, and the like are disposed. In this stencil printing apparatus 1, W / O type emulsion ink (hereinafter simply referred to as ink) is used in which an aqueous phase is emulsified in an oil phase in which a pigment is uniformly dispersed in a non-drying oil or a non-volatile oil. This ink does not contain any special components for promoting drying after printing. This is to prevent the ink in the plate cylinder 3 from drying and clogging due to leaving it for a long period of time. This ink is apparently dried by penetrating into the fibers of the printing paper 9 after printing.
[0031]
A portion where the plate cylinder 3 and the press roller 4 are in contact with each other is a printing portion 15, and printing is performed at the printing portion 15 on the printing paper 9 fed from the paper supply platform 10. The printed paper 9 a on which printing has been performed is sucked and transported by the suction transport unit 7, and is discharged out of the main body case 2 from the paper discharge port 11.
[0032]
A drying device 16 is disposed on the side of the main body case 2 and facing the paper discharge port 11, and the drying device 16 is provided with a main body case 17 as an exterior member. In the main body case 17, a conveyor belt 18 that conveys the printed paper 9a, two rollers 19 and 20 that support the conveyor belt 18, a belt drive motor 21 that rotationally drives one of the rollers 20, and a printed paper 9a. A paper leading edge detection sensor 22 that detects that the leading edge of the paper has reached the conveying belt 18, and a paper trailing edge that confirms that the trailing edge of the printed paper 9a has passed the conveying belt 18 and no jam has occurred. The edge detection sensor 23, the air suction device 24 that adsorbs the printed paper 9a conveyed by the conveying belt 18 to the conveying belt 18, and the far infrared heater 25 that is a drying unit that dries the printed paper 9a conveyed by the conveying belt 18. A control device 26 that includes a CPU, a ROM, a RAM, and the like and controls various operations of the drying device 16 is provided. Further, on one side surface of the main body case 17, there are a paper discharge tray 27 on which the printed paper 9 a is stacked and a jump plate 28 for sitting the printed paper 9 a on the paper discharge tray 27. It is attached.
[0033]
FIG. 2 is a block diagram showing a control system for the stencil printing apparatus 1 and the drying apparatus 16. The stencil printing apparatus 1 and the drying apparatus 16 are connected online. The control device 8 of the stencil printing apparatus 1 includes an operation panel 29 provided with various keys (not shown) and various display units (not shown), a plate cylinder rotation motor 30 that rotates the plate cylinder 3, and a feed A paper feed motor 31 for feeding the printing paper 9 on the paper board 10, a press roller moving motor 32 for moving the press roller 4 to and away from the plate cylinder 3, and the plate making unit 6 are connected. Various keys provided on the operation panel 29 include a numeric keypad for inputting the number of prints, a printing speed switching key for switching the printing speed, a drying degree switching key for switching the degree of drying in the drying device 16, and a feed for switching the paper feeding mode. There is a paper mode switch key.
[0034]
When the drying device 16 is turned on (more precisely, the far-infrared heater 25 is turned on), the control device 8 switches the paper feeding mode from the normal paper feeding mode to the skip paper feeding mode on the software. It functions as a paper mode switching means. Also, when the skip paper feed mode is switched by the paper feed mode switching means, the number of skips is changed according to the printing speed and the degree of drying at that time.
[0035]
In the skip sheet feeding mode, the sheet feeding is performed once per rotation of the plate cylinder 3 in the normal sheet feeding mode, whereas the sheet feeding is performed a number of times less than the number of rotations of the plate cylinder 3. For example, when the number of skips in the skip sheet feeding mode is N, sheet feeding is performed once per N rotations of the plate cylinder 3. As the number of skips increases, the paper feed interval becomes longer. The sheet feeding mode can be switched manually by operating a sheet feeding mode switching key provided on the operation panel 29.
[0036]
Further, by operating a printing speed switching key provided on the operation panel 29, the printing speed can be changed by changing the number of rotations of the plate cylinder 3. As shown in Tables 1 and 2 to be described later, printing is performed at 60 sheets / minute when the printing speed is 1st speed, 90 sheets / minute when the printing speed is 3rd, and 120 sheets / minute when the printing speed is 5th. Done.
[0037]
Further, by operating a drying degree switching key provided on the operation panel 29, the supply voltage to the far infrared heater 25 of the drying device 16 can be changed to change the degree of drying of the printed paper 9a. As shown in Table 1 described later, the heater supply voltage is 100 V when the drying degree is “strong”, the heater supply voltage is 75 V when the drying degree is “medium”, and the drying degree is “weak”. The heater supply voltage is 50V.
[0038]
Connected to the control device 26 of the drying device 16 are a paper leading edge detection sensor 22, a paper trailing edge detection sensor 23, a belt drive motor 21, a far infrared heater 25, a suction motor 33 for driving the air suction device 24, and the like. . This control device 26 functions as a drying promoting means for switching the transport speed of the printed paper 9a to a low speed on the software according to the printing speed in the stencil printing apparatus 1 and the number of skips at the time of skip feeding.
[0039]
In such a configuration, when the printed paper 9a that has been printed in the stencil printing apparatus 1 is dried in the drying apparatus 16, the power switch of the drying apparatus 16 (more precisely, the far-infrared heater 25 Turn on the power switch. Then, the paper feed mode of the stencil printing apparatus 1 is switched to the skip paper feed mode by the control device (paper feed mode switching means) 8, and the skip count of the skip paper feed mode is set by a key operation on the operation panel 29. Can be switched according to the printing speed and the degree of drying. Specific examples are shown in Table 1.
[0040]
[Table 1]

[0041]
For example, when the printing speed is 5th and the degree of drying is “strong”, the skip number of skip sheet feeding modes switched by the control device (sheet feeding mode switching unit) 8 is 8.
[0042]
When the paper feeding mode of the stencil printing apparatus 1 is switched to the skip paper feeding mode, for example, when the number of skips is N, the paper discharge interval time of the printed paper 9a discharged from the paper discharge port 11 ( The time from when the paper leading edge detection sensor 22 is turned on to when the paper leading edge detection sensor 22 is turned on again (PT) is N times that when the paper is fed in the normal paper feeding mode. In other words, even if the transport speed of the printed paper 9a in the drying device 16 is transported at a speed of 1 / N when the paper is fed in the normal paper feed mode, the subsequent printed paper 9a collides. Prevents paper jams.
[0043]
Therefore, when the paper feeding mode of the stencil printing apparatus 1 is switched to the skip paper feeding mode by the control device (paper feeding mode switching means) 8 and the skip count at that time is switched to N times, the inside of the drying device 16 The transport speed of the printed paper 9a is switched to a low speed by the control device (drying promoting means) 26 in a range where the subsequent printed paper 9a collides with the printing speed and the number of skips so as not to be jammed. For this reason, the drying time of the printed paper 9a by the far-infrared heater 25 becomes longer, and the drying of the printed paper 9a is promoted. Moreover, drying of the printed paper 9a can be promoted without increasing the size of the drying device 16.
[0044]
Table 2 shows specific examples of the printing speed, the number of skips, and the paper discharge interval time PT.
[0045]
[Table 2]

[0046]
For example, when the printing speed is 5 and the skip count is 5, the paper discharge interval time PT is 2.5 seconds, and the drying time of the printed paper 9a in the drying device 16 is less than 2.5 seconds. The transport speed of the printed paper 9a can be reduced to such an extent that the time required to pass through the drying device 16 is less than 2.5 seconds. For this reason, as described in the conventional example, the drying time is significantly longer than when the drying time is approximately 0.3 seconds when printing is performed while feeding in the normal paper feeding mode at substantially the same printing speed. And the drying of the printed paper 9a can be promoted.
[0047]
In the present embodiment, the case where the controller 8 is switched to the skip sheet feeding mode by turning on the drying device 16 (more precisely, the far-infrared heater 25 is turned on) will be described as an example. However, when the skip paper feed mode is selected by the paper feed mode switching key on the operation panel 29, the drying device 16 is turned on by the control device 8 functioning as a control means (more precisely, the far infrared heater 25 is turned on). ON).
[0048]
Further, in the present embodiment, the control device (drying acceleration means) 26 of the drying device 16 is controlled in the drying device 16 according to the printing speed in the stencil printing device 1 and the number of skips at the time of skip feeding. Although the case where the conveyance speed of the printed paper 9a is switched to a low speed has been described as an example, the control device (drying acceleration unit) 26 responds to either the printing speed or the skip count in the stencil printing apparatus 1. Thus, the conveyance speed of the printed paper 9a may be switched to a low speed.
[0049]
Next, a second embodiment of the present invention will be described with reference to FIG. The present embodiment is the same as the first embodiment shown in FIGS. 1 and 2 with respect to the external configuration and control system configuration, and will be described with reference to FIGS. 1 and 2. To do.
[0050]
The present embodiment is different from the first embodiment in that the control device 26 removes the printed paper 9a from the far infrared according to the printing speed in the stencil printing apparatus 1 and the number of skips at the time of skip feeding. It is a point that functions as a drying promoting means for stopping at a position facing the heater 25 for a predetermined time.
[0051]
FIG. 3 is a timing chart showing the relationship between ON / OFF of the paper leading edge detection sensor 22 and the conveyance speed of the conveyance belt 18. The transport speed when the transport belt 18 is transporting the printed paper 9a is V2, and this transport speed V2 is set to a value of 50 to 70% with respect to the transport speed V1 of the suction transport unit 7. ing.
[0052]
As for the control of the conveyor belt 18, the energization to the belt drive motor 21 is cut off at the timing when the paper leading edge detection sensor 22 is turned off, and the energization is resumed after the belt drive motor 21 is stopped for a predetermined time (stop time: T). Is done. This stop time T is set so that a minute time t is obtained from when the energization is resumed until the paper leading edge detection sensor 22 is turned on.
[0053]
Regarding the stop time T, when the printing speed is 5 and the skip count is 5, the discharge interval time PT is 2.5 seconds (see Table 2). A slightly shorter time, for example, about 2 seconds.
[0054]
In such a configuration, the printed paper 9a conveyed in the drying device 16 is stopped for about 2 seconds at a position facing the far-infrared heater 25, so that a sufficient drying time can be ensured, and the printed paper The drying of 9a can be promoted.
[0055]
In this embodiment, the case where the energization to the belt drive motor 21 is cut off at the timing when the paper leading edge detection sensor 22 is turned off is described as an example. However, the paper leading edge detection sensor 22 is turned on. Thereafter, the belt drive motor 21 may be driven by a pulse corresponding to a predetermined conveyance distance, and then the energization to the belt drive motor 21 may be cut off.
[0056]
Further, in the present embodiment, the control device (drying acceleration means) 26 of the drying device 16 moves the printed paper 9a away according to the printing speed in the stencil printing device 1 and the number of skips at the time of skip feeding. The case of stopping for a predetermined time at the position facing the infrared heater 25 has been described as an example. However, the control device (drying acceleration means) 26 sets the printing speed in the stencil printing apparatus 1 or the number of skips to one of them. Accordingly, the printed paper 9a may be stopped at a position facing the far infrared heater 25 for a predetermined time.
[0057]
Next, a third embodiment of the present invention will be described with reference to FIG. The same parts as those described in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof is omitted (the same applies hereinafter). A stencil printing apparatus 34, which is a printing apparatus according to the present embodiment, is provided with a main body case 35 as an exterior member. In the main body case 35, there are provided a control device 36 that includes a plate cylinder 3, a press roller 4, a plate making unit 6, a CPU, a ROM, a RAM, and the like and controls various operations of the stencil printing device 34. Further, a drying unit 37 for drying the printed paper 9 a is provided in the main body case 35, and a paper discharge table 27 is attached to one side surface portion of the main body case 35.
[0058]
The drying unit 37 detects the belt driving motor 21 and the printed paper 9a by rotating and driving the conveying belt 18 that conveys the printed paper 9a, the two rollers 19 and 20 that support the conveying belt 18, and one of the rollers 20. The paper detection sensor 38, the air suction unit 24 that adsorbs the printed paper 9a conveyed by the conveying belt 18 to the conveying belt 18, and the far infrared heater 25 that is a drying unit that dries the printed paper 9a conveyed by the conveying belt 18. Etc.
[0059]
The control device 36 functions as a paper feed mode switching unit that switches the paper feed mode to the skip paper feed mode when the drying unit 37 is turned on (more precisely, the far infrared heater 25 is turned on). When the mode is switched to the skip paper feeding mode by the mode switching means, the number of skips is changed according to the printing speed and the degree of drying at that time. Further, the control device 36 functions as a drying accelerating unit that switches the conveyance speed of the printed paper 9a to a low speed in accordance with the printing speed in the stencil printing apparatus 34 and the number of skips at the time of skip feeding.
[0060]
In such a configuration, when the printed paper 9a on which printing has been performed is dried by the drying unit 37, the power switch of the drying unit 37 (more precisely, the power switch of the far infrared heater 25) is turned on. . Then, the paper feed mode of the stencil printing device 34 is switched to the skip paper feed mode by the control device (paper feed mode switching means) 36. Further, when the number of skips in the skip sheet feeding mode is switched to N times, the control device (drying promotion means) 36 switches the transport speed of the printed paper 9a according to the printing speed and the skip count N. The transport speed of the printed paper 9a that is transported facing the far-infrared heater 25 is low as long as the subsequent printed paper 9a does not collide with the printed paper 9a. For this reason, the drying time of the printed paper 9a by the far-infrared heater 25 becomes longer, and the drying of the printed paper 9a is promoted. Moreover, drying of the printed paper 9a can be promoted without increasing the size of the drying unit 37 and the stencil printing device 34.
[0061]
In the present embodiment, the case where the control unit 36 switches to the skip sheet feeding mode as the drying unit 37 is turned on (more precisely, the far infrared heater 25 is turned on) will be described as an example. However, when the skip paper feed mode is selected with the paper feed mode switching key of the operation panel 29, the drying unit 37 is turned on by the control device 36 functioning as a control means (more precisely, the far infrared heater 25 is turned on). ).
[0062]
Further, in the present embodiment, the control device (drying acceleration means) 36 prints the printed paper in the stencil printing device 34 according to the printing speed in the stencil printing device 34 and the number of skips at the time of skip feeding. The case where the transport speed of 9a is switched to a low speed has been described as an example, but the control device (drying acceleration means) 36 has been printed according to either the printing speed or the skip count in the stencil printing device 34. The conveyance speed of the paper 9a may be switched to a low speed.
[0063]
Next, a fourth embodiment of the present invention will be described. This embodiment is the same as the third embodiment shown in FIG. 4 with respect to the configuration on the appearance, and will be described with reference to FIG.
[0064]
The present embodiment is different from the third embodiment in the control form of the control device (drying acceleration means) 36. The printed paper 9a is changed according to the printing speed and the number of skips at the time of skip feeding. The point is to stop at a position facing the far infrared heater 25 for a predetermined time.
[0065]
The stop time T at which the printed paper 9a stops at the position facing the far-infrared heater 25 is substantially the same as in the second embodiment. For example, the printing speed is 5th and the number of skips is 5 times. In this case, it takes about 2 seconds.
[0066]
In such a configuration, as soon as the paper detection sensor 38 detects the trailing edge of the printed paper 9 a, the energization to the belt drive motor 21 is cut off, and the printed paper 9 a is approximately 2 at a position facing the far infrared heater 25. Paused for seconds. For this reason, a sufficient drying time for drying the printed paper 9a can be secured, and drying of the printed paper 9a can be promoted.
[0067]
In the present embodiment, the control device (drying acceleration means) 36 transfers the printed paper 9a to the far-infrared heater 25 in accordance with the printing speed in the stencil printing device 34 and the number of skips at the time of skip feeding. The case of stopping at a facing position for a predetermined time has been described as an example, but the control device (drying acceleration means) 36 has been printed according to either the printing speed or the number of skips in the stencil printing device 34 The sheet 9a may be stopped at a position facing the far infrared heater 25 for a predetermined time.
[0068]
Next, a fifth embodiment of the present invention will be described with reference to FIG. The basic structure of this embodiment is substantially the same as that of the first embodiment shown in FIG. 1, and is located on the side of the stencil printing apparatus 1 and the main body case 2 of the stencil printing apparatus 1 and at the paper discharge port 11. And a drying device 39 disposed at a position facing the surface. In the main body case 40 of the drying device 39, + and-are alternately arranged at equal pitches on the back side of the conveying belt 18, the belt driving motor 21, the sheet leading edge detection sensor 22, and the conveying belt 18 that convey the printed paper 9a. There are provided a control device 43 and the like which are provided with a large number of electrodes 41, which are arranged drying means, a high-frequency generating power source 42, a CPU, a ROM, a RAM, and the like and which control various operations of the drying device 39. The conveyor belt 18 is formed non-conductive, and the electrode 41 promotes drying of the printed paper 9a by heating moisture on the surface of the printed paper 9a by high frequency dielectric. The control device 43 functions as a drying accelerating unit that switches the conveyance speed of the printed paper 9a to a low speed according to the printing speed in the stencil printing apparatus 1 and the number of skips at the time of skip feeding.
[0069]
In such a configuration, when the printed paper 9a that has been printed in the stencil printing apparatus 1 is dried in the drying apparatus 39, the power switch of the drying apparatus 39 (more precisely, the power switch of the electrode 41) ) Is turned ON. Then, the paper feed mode of the stencil printing apparatus 1 is switched to the skip paper feed mode by the control device (paper feed mode switching means) 8.
[0070]
Further, when the paper feeding mode of the stencil printing apparatus 1 is switched to the skip paper feeding mode, the transport speed of the printed paper 9a is switched by the control device (drying acceleration means) 43 according to the printing speed and the number of skips at that time. The transport speed of the printed paper 9a transported on the transport belt 18 is low in a range where the subsequent printed paper 9a does not collide with the printed paper 9a. For this reason, the drying time of the printed paper 9a by the high frequency dielectric generated from the electrode 41 becomes longer, and the drying of the printed paper 9a is promoted.
[0071]
In the present embodiment, the case where the conveyance speed is set to be low has been described as an example of the control by the control device (drying acceleration means) 43 for promoting the drying of the printed paper 9a. The drying may be accelerated by stopping for a predetermined time.
[0072]
In each of the above-described embodiments, the structure in which the paper feed mode switching unit and the drying promoting unit are switched by processing on software has been described as an example. However, a structure in which switches are mechanically switched may be used.
[0073]
【The invention's effect】
According to the printing apparatus of the first aspect, when the printed paper is dried by the drying device, when the drying device is turned on, the paper feeding mode is switched to the skip paper feeding mode by the paper feeding mode switching means. Since the paper feeding interval of the printing paper becomes longer and the paper ejection interval of the printed paper from the paper outlet becomes longer, the transport speed of the printed paper in the drying device hits the subsequent printed paper and the paper is jammed. It is possible to reduce the speed of the printed paper, and by lowering the transport speed of the printed paper, the drying time of the printed paper can be lengthened without increasing the size of the drying device, thereby promoting the drying of the printed paper. Can be planned.
[0074]
According to the printing apparatus of the second aspect of the present invention, if the skip feeding mode is selected as the feeding mode of the printing apparatus after the drying apparatus is attached at a position facing the discharge port of the printing apparatus, the drying apparatus is turned on. Therefore, drying of printed paper can be promoted.
[0075]
According to the third aspect of the present invention, when the printed unit is dried by the drying unit, when the drying unit is turned on, the sheet feeding mode is switched to the skip sheet feeding mode by the sheet feeding mode switching unit. Since the printing paper feed interval becomes longer, the transport speed of the printed paper when drying with the drying unit can be reduced so long as the subsequent printed paper does not collide with the printed paper. By lowering the conveying speed, the drying time of the printed paper can be lengthened without increasing the size of the drying unit, and the drying of the printed paper can be promoted.
[0076]
According to the printing apparatus of the fourth aspect of the present invention, when the skip sheet feeding mode is selected as the sheet feeding mode of the printing apparatus, the drying unit is turned on, so that drying of printed sheets can be promoted.
[0077]
According to the printing apparatus of the fifth aspect of the invention, the number of skips increases when the printing speed is high, and the number of skips decreases when the printing speed is low. Even when the paper feed intervals are the same and the printing speed is different, the printed paper can be conveyed at the same low speed when drying by the drying device or the drying unit, and drying of the printed paper can be promoted.
[0078]
According to the printing apparatus of the sixth aspect of the invention, when the degree of drying is increased, the number of skips is increased and the feeding interval of the printing paper is increased, and when the degree of drying is decreased, the number of skips is decreased. Since the printing paper feed interval is shortened, when the degree of drying is increased, the transport speed of the printed paper during drying by the drying device or drying unit can be reduced, and when the degree of drying is reduced. Can increase the transport speed of printed paper during drying by a drying device or drying unit, so that when the degree of drying is increased, the drying time can be lengthened, and when the degree of drying is decreased The drying time can be shortened and the printed paper can be dried to a desired degree of drying.
[0079]
According to the printing apparatus of the seventh aspect of the invention, the time interval for the printed paper that has passed through the printing location to reach the drying unit is determined according to at least one of the printing speed and the number of skips. Print by the drying means by switching the transport speed of the printed paper at the position facing the means to a low speed within the range where the subsequent printed paper hits and does not clog according to the printing speed and the number of skips. The drying time of the finished paper becomes longer, and drying of the printed paper can be promoted without increasing the size of the drying unit.
[0080]
According to the printing apparatus of the eighth aspect of the invention, the time interval for the printed paper that has passed through the printing location to reach the drying unit is determined according to at least one of the printing speed and the number of skips. Depending on the speed and number of skips, the printing time of the printed paper is stopped by the drying promoting means at a position facing the drying means for a predetermined time in a range where the subsequent printed paper does not collide with the printing paper. It becomes long, and drying of printed paper can be promoted without increasing the size of the drying unit.
[0081]
According to the drying device of the ninth aspect, the time interval of the printed paper discharged from the discharge port of the printing device into the drying device depends on at least one of the printing speed and the number of skips. By changing the conveyance speed of the printed paper in the drying device to a low speed with the drying promoting means within the range where the subsequent printed paper hits and does not clog according to the printing speed and the number of skips, the drying device The drying time of the printed paper in the printer becomes longer, and drying of the printed paper can be promoted without increasing the size of the drying device.
[0082]
According to the drying device of the tenth aspect, the time interval of the printed paper discharged from the discharge port of the printing device into the drying device depends on at least one of the printing speed and the number of skips. Therefore, depending on the printing speed and the number of skips, the printed paper is stopped in the drying device by the drying promotion means for a predetermined time in a range where the subsequent printed paper hits and does not jam. The drying time of the printed paper becomes longer, and drying of the printed paper can be promoted without increasing the size of the drying device.
[Brief description of the drawings]
FIG. 1 is a longitudinal front view showing a stencil printing apparatus and a drying apparatus according to a first embodiment of the present invention.
FIG. 2 is a block diagram showing a control system of the stencil printing apparatus and the drying apparatus.
FIG. 3 is a timing chart showing a relationship between ON / OFF of a paper leading edge detection sensor and a conveyance speed of a conveyance belt in a second embodiment of the present invention.
FIG. 4 is a longitudinal front view showing a stencil printing apparatus according to a third embodiment of the present invention.
FIG. 5 is a longitudinal front view showing a stencil printing apparatus and a drying apparatus according to a fifth embodiment of the present invention.
[Explanation of symbols]
1,34 Printing device
2 Body case
8. Paper feed mode switching means, control means
9 Printing paper
9a Pre-printed paper
11 Paper exit
15 Print location
16,39 Drying device
25, 41 Drying means
26, 43 Drying promotion means
35 Body case
36 Paper feed mode switching means, control means, drying promoting means
37 Drying unit

Claims (10)

A drying device that dries printed paper ejected from a paper ejection port formed in the main body case can be attached to a position facing the paper ejection port, and feeds the printing paper toward a printing location. In a printing apparatus having a skip feeding mode as a mode,
A printing apparatus, comprising: a paper feed mode switching unit that automatically switches a paper feed mode to a skip paper feed mode when the drying device attached at a position facing the paper discharge port is turned on. . A drying device that dries printed paper ejected from a paper ejection port formed in the main body case can be attached to a position facing the paper ejection port, and feeds the printing paper toward a printing location. In a printing apparatus having a skip feeding mode as a mode,
A printing apparatus comprising: a control unit that turns on the drying device attached at a position facing the paper discharge port when the skip paper feed mode is selected. In a printing apparatus having a drying unit for drying printed paper after printing is provided in the main body case, and having a skip paper feeding mode as a paper feeding mode for feeding the printing paper toward a printing location,
A printing apparatus, comprising: a paper feed mode switching unit that automatically switches a paper feed mode to a skip paper feed mode when the drying unit is turned on. In a printing apparatus having a drying unit for drying printed paper after printing is provided in the main body case, and having a skip paper feeding mode as a paper feeding mode for feeding the printing paper toward a printing location,
A printing apparatus comprising control means for turning on the drying unit when the skip paper feed mode is selected. The paper feeding mode is capable of switching the printing speed when printing on the printing paper, and increasing the number of skips when the printing speed is high and decreasing the number of skips when the printing speed is low. 4. The printing apparatus according to claim 1, wherein the skip number is switched by the switching means. The degree of drying of the printed paper by the drying device or the drying unit can be switched, and when the degree of drying is high, the number of skips is increased, and when the degree of drying is weak, the number of skips is decreased. 4. A printing apparatus according to claim 1, wherein the skip count is switched by the mode switching means. A drying unit provided with a drying means for drying the printed paper facing the printed paper that has been printed is provided in the main body case, and skip feeding as a paper feed mode for feeding the printed paper toward the printing location. In a printing apparatus having a paper mode and capable of switching a printing speed when printing on the printing paper,
A drying accelerating unit that switches the conveyance speed of the printed paper at a position facing the drying unit to a low speed according to at least one of a printing speed and a skip count at the time of paper feeding in the skip paper feeding mode; A printing apparatus characterized by the above. A drying unit provided with a drying means for drying the printed paper facing the printed paper that has been printed is provided in the main body case, and skip feeding as a paper feed mode for feeding the printed paper toward the printing location. In a printing apparatus having a paper mode and capable of switching a printing speed when printing on the printing paper,
The image forming apparatus includes a drying accelerating unit that stops the printed sheet at a position facing the drying unit for a predetermined time according to at least one of a printing speed and a skip count at the time of sheet feeding in the skip sheet feeding mode. Printing device to do. In a drying device that is attached to a position facing a paper discharge port formed in a main body case of the printing apparatus and dries printed paper discharged from the paper discharge port.
Drying promotion means for switching the transport speed of the printed paper to a low speed in accordance with at least one of the printing speed in the printing apparatus and the number of skips at the time of feeding in the skip feeding mode in the printing apparatus A drying apparatus comprising: In a drying apparatus having a drying unit attached to a position facing a paper discharge port formed in a main body case of the printing apparatus, and drying the printed paper facing the printed paper discharged from the paper discharge port. ,
Drying in which the printed paper is stopped at a position facing the drying unit for a predetermined time in accordance with at least one of a printing speed in the printing apparatus and a skip count at the time of skip feeding in the printing apparatus. A drying apparatus having a promoting means.

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