JP4796528B2 - Paper transport control method and electrophotographic apparatus - Google Patents

Paper transport control method and electrophotographic apparatus Download PDF

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JP4796528B2
JP4796528B2 JP2007076760A JP2007076760A JP4796528B2 JP 4796528 B2 JP4796528 B2 JP 4796528B2 JP 2007076760 A JP2007076760 A JP 2007076760A JP 2007076760 A JP2007076760 A JP 2007076760A JP 4796528 B2 JP4796528 B2 JP 4796528B2
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paper
puller
roll
tractor
printing
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JP2008233770A (en
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剛史 長洲
定典 小橋
聡 藤田
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Ricoh Co Ltd
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Description

本発明は、レーザビームプリンタや複写機などの電子写真装置の用紙搬送機構における用紙搬送制御に関するものである。   The present invention relates to paper conveyance control in a paper conveyance mechanism of an electrophotographic apparatus such as a laser beam printer or a copying machine.

レーザビームプリンタ等の電子写真装置は、図４に示すように印刷用紙２０１をトラクタ２０３により感光ドラム２０２の周期と同速度で移動させ、転写器２０８により印刷用紙２０１に図示していないトナーを転写させた後、印刷用紙２０１に一定の張力を与える為のバッファ２０４を通り、用紙搬送ガイド２０５を通過後、熱ロール２０６及び加圧ロール２０７により図示していないトナー像を加圧・加熱し、印刷用紙２０１に溶融定着させ、プラー２１０で印刷用紙２０１を一定張力で引張り、印刷用紙２０１を折り畳むためのスゥィングフィン２１２で印刷用紙を折り畳んだ後、印刷用紙２０１を積載するスタッカ２１３へ印刷用紙２０１を搬送する。   In an electrophotographic apparatus such as a laser beam printer, as shown in FIG. 4, the printing paper 201 is moved by the tractor 203 at the same speed as the cycle of the photosensitive drum 202, and toner (not shown) is transferred to the printing paper 201 by the transfer device 208. Then, after passing through the buffer 204 for applying a constant tension to the printing paper 201, passing through the paper transport guide 205, a heat roll 206 and a pressure roll 207 pressurize and heat a toner image (not shown), After the printing paper 201 is melted and fixed on the printing paper 201, the printing paper 201 is pulled with a constant tension by the puller 210, the printing paper 201 is folded by the swing fin 212 for folding the printing paper 201, and then the printing paper 201 is fed to the stacker 213 on which the printing paper 201 is stacked. Transport.

非印刷中は、印刷用紙２０１は停止した状態であり、印刷用紙２０１と熱ロール２０６の接触による用紙の変色や変形を防止するために熱ロール２０６と加圧ロール２０７は非接触状態としている。用紙２０１は、印刷を停止した時の状態のままであるため、トラクタ２０３とプラー２１０間でたるみの無い状態となっている。   During non-printing, the printing paper 201 is in a stopped state, and the thermal roll 206 and the pressure roll 207 are in a non-contact state in order to prevent discoloration or deformation of the paper due to contact between the printing paper 201 and the thermal roll 206. Since the sheet 201 remains in the state when printing is stopped, there is no slack between the tractor 203 and the puller 210.

次に印刷時のプラー２１０の動作について、図２を用いて説明する。   Next, the operation of the puller 210 during printing will be described with reference to FIG.

電子写真装置は、図２に示すように図示しない上位装置からの印刷信号ＰＲＩＮＴ−Ｐが「１」となることで、印刷が開始され、ＰＲＩＮＴ−Ｐが「０」となると印刷が停止する。ＰＲＩＮＴ−Ｐが「１」となると、プラー駆動信号ＰＵＬＬＥＲ ＤＲＶ−Ｐ信号を「１」、プラー方向信号ＰＵＬＬＥＲ ＣＣＷ−Ｐを「１」とし、プラー駆動部２１１によりプラー２１０は用紙搬送方向に回転する。上位装置からの印刷信号ＰＲＩＮＴ−Ｐが「０」となると、プラー２１０の駆動信号ＰＵＬＬＥＲ ＤＲＶ−Ｐ信号を「０」としプラー２１０は停止する。   As shown in FIG. 2, the electrophotographic apparatus starts printing when the print signal PRINT-P from the host apparatus (not shown) becomes “1”, and stops printing when PRINT-P becomes “0”. When PRINT-P becomes “1”, the puller driving signal PULLER DRV-P signal is set to “1”, the puller direction signal PULLER CCW-P is set to “1”, and the puller driving unit 211 causes the puller 210 to rotate in the paper transport direction. . When the print signal PRINT-P from the host apparatus becomes “0”, the drive signal PULLER DRV-P signal of the puller 210 is set to “0”, and the puller 210 stops.

次にスタッカ２１３動作時のプラー２１０の動作について、図３を用いて説明する。スタッカ２１３は、印刷が終了した後にオペレータが印刷用紙２０１を取り出し易くするために、スタッカ上下スイッチ２１５により上昇・下降が可能な構成となっている。   Next, the operation of the puller 210 during the operation of the stacker 213 will be described with reference to FIG. The stacker 213 can be raised and lowered by a stacker up / down switch 215 so that an operator can easily take out the printing paper 201 after printing is completed.

図３に示すようにスタッカ上下スイッチ２１５押下によってスタッカスイッチ押下信号ＳＴ ＳＷ−Ｐが「１」となると、スタッカ駆動信号ＳＴ ＤＲＶ−Ｐを「１」とし、スタッカ駆動部２１４によりスタッカ２１３が動作する。オペレータが印刷用紙２０１を取り出す際の用紙弛みによる熱ロール２０６と印刷用紙２０１の接触を防止するため、スタッカスイッチ押下信号ＳＴ ＳＷ−Ｐが「１」となることで、プラー２１０の駆動信号ＰＵＬＬＥＲ ＤＲＶ−Ｐ信号を「１」、プラー方向信号ＰＵＬＬＥＲ ＣＣＷ−Ｐを「１」とし、プラー駆動部２１１にてプラー２１０を用紙搬送方向に駆動する。これにより、スタッカ２１３動作中はトラクタ２０３とプラー２１０間で用紙の弛みの無い状態としている。   As shown in FIG. 3, when the stacker switch pressing signal ST SW-P becomes “1” by pressing the stacker up / down switch 215, the stacker driving signal ST DRV-P is set to “1”, and the stacker driving unit 214 operates the stacker 213. . In order to prevent the heat roll 206 and the printing paper 201 from coming into contact with each other when the operator takes out the printing paper 201, the stacker switch press signal ST SW-P becomes “1”, so that the driving signal PULLER DRV of the puller 210 is set. The −P signal is set to “1”, the puller direction signal PULLER CCW-P is set to “1”, and the puller driving unit 211 drives the puller 210 in the paper transport direction. As a result, the paper is not loose between the tractor 203 and the puller 210 during the operation of the stacker 213.

また、特許文献１のような用紙装填時に搬送部２１６が開閉可能な機構の場合は、搬送部２１６を開閉時にもプラー２１０を駆動し、トラクタ２０３とプラー２１０間で用紙の弛みの無い状態としている。   Further, in the case of a mechanism that can open and close the conveyance unit 216 when paper is loaded as in Patent Document 1, the puller 210 is driven even when the conveyance unit 216 is opened and closed so that there is no looseness between the tractor 203 and the puller 210. Yes.

特許第３６１７２１７号公報Japanese Patent No. 3617217

従来の電子写真装置は、非印刷中に熱ロール２０６と印刷用紙２０１の接触による用紙の変色や変形を防止するためにオペレータの操作を契機にプラー２１０を駆動してトラクタ２０３とプラー２１０間で用紙の弛みの無い状態としていた。しかし、オペレータがスタッカ２０３から印刷用紙２０１を取り出す際にスタッカ２０３の上昇・下降をせずに取り出しを行った場合、プラー２１０を駆動する契機が無いため、トラクタ２０３とプラー２１０間で用紙の弛みが生じて、熱ロール２０６の熱により、用紙が変形する場合があった。   In the conventional electrophotographic apparatus, in order to prevent discoloration or deformation of the paper due to the contact between the heat roll 206 and the printing paper 201 during non-printing, the puller 210 is driven by the operation of the operator, and the tractor 203 and the puller 210 are driven. There was no slack in the paper. However, when the operator takes out the printing paper 201 from the stacker 203 without taking the stacker 203 up and down, there is no opportunity to drive the puller 210, so the paper is loose between the tractor 203 and the puller 210. In some cases, the sheet is deformed by the heat of the heat roll 206.

本発明の目的は、非印刷中の装置内の用紙たるみ等による不具合を解消して、信頼性の高い用紙搬送制御方法を提供することにある。   SUMMARY OF THE INVENTION An object of the present invention is to provide a highly reliable paper transport control method that eliminates problems caused by paper slack in a non-printing apparatus.

上記目的を達成するため本発明は、感光体上に形成されたトナー像を用紙に転写させる転写器と、前記転写器に対し用紙搬送方向下流側に設けられた用紙搬送トラクタと、該トラクタに対し用紙搬送方向下流側に設けられ、用紙上に転写されたトナー像を加熱・加圧することにより定着するための熱ロール及び加圧ロールと、前記熱ロールと加圧ロールの用紙搬送方向下流側に設けられた搬送ローラ対と、前記用紙搬送トラクタ、前記熱ロールと加圧ロールおよび搬送ローラ対で長尺に連続した用紙を搬送させながら該用紙にトナー像を印刷する電子写真装置の用紙搬送制御方法において、非印刷中の用紙停止時に規定間隔で前記搬送ローラ対を用紙搬送方向へ駆動、停止させることを特徴とするものである。   In order to achieve the above object, the present invention provides a transfer device for transferring a toner image formed on a photoreceptor onto a paper, a paper transport tractor provided on the downstream side of the transfer device in the paper transport direction, A heat roll and a pressure roll that are provided on the downstream side in the paper transport direction and are fixed by heating and pressurizing the toner image transferred onto the paper, and a downstream side in the paper transport direction of the heat roll and the pressure roll. Paper transport of an electrophotographic apparatus that prints a toner image on the paper while transporting a continuous paper in a long length by the transport roller pair provided on the paper, the paper transport tractor, the heat roll, the pressure roll, and the transport roller pair In the control method, the conveyance roller pair is driven and stopped in the sheet conveyance direction at a predetermined interval when the sheet is stopped during non-printing.

本発明の用紙搬送制御方法は、オペレータの操作に関係無く非印刷中の装置内の用紙のたるみを無くすことができ、用紙の熱ロール接触による熱変形や変色を防止することができる。   The paper transport control method of the present invention can eliminate the slack of the paper in the non-printing apparatus regardless of the operation of the operator, and can prevent thermal deformation and discoloration due to the hot roll contact of the paper.

非印刷中の装置内の用紙たるみにより、用紙と熱ロールが接触し用紙の変色や変形となることを防止する目的を、プラーを規定の間隔で用紙搬送方向へ駆動することで、従来と同じ構成で実現した。   The purpose of preventing paper discoloration or deformation due to paper slack in the machine during non-printing and causing paper discoloration or deformation is the same as before by driving the puller in the paper transport direction at specified intervals. Realized by configuration.

本発明における実施例を図１、図４を用いて説明する。図１は、本発明における用紙搬送制御方法を示すタイムチャートである。   An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a time chart showing a paper conveyance control method according to the present invention.

電子写真装置は図示しない上位装置からの印刷信号ＰＲＩＮＴ−Ｐが「１」となると、プラー駆動信号ＰＵＬＬＥＲ ＤＲＶ−Ｐ信号を「１」、プラー方向信号ＰＵＬＬＥＲ ＣＣＷ−Ｐを「１」とし、プラー駆動部２１１によりプラー２１０は用紙搬送方向に駆動する。ＰＲＩＮＴ−Ｐが「０」となるとプラー２１０の駆動信号ＰＵＬＬＥＲ ＤＲＶ−Ｐ信号を「０」とし、プラー２１０は停止する。ＰＲＩＮＴ−Ｐ信号が「０」の期間は非印刷状態であり、印刷用紙２０１は停止している。非印刷中はプラー駆動信号ＰＵＬＬＥＲ ＤＲＶ−Ｐ信号を「０」としてから、Ｔ１時間経過後にプラー駆動信号ＰＵＬＬＥＲ ＤＲＶ−Ｐ信号を「１」、プラー方向信号ＰＵＬＬＥＲ ＣＣＷ−Ｐを「１」とし、Ｔ２時間経過後にプラー駆動信号ＰＵＬＬＥＲ ＤＲＶ−Ｐ信号を「０」とする。これによりプラー２１０はＴ１時間停止、Ｔ２時間駆動を繰り返し行うことで、間欠的な動作となり、トラクタ２０３とプラー２１０間で用紙の弛みを無くすことが出来る。停止時間Ｔ１は、印刷用紙２０１と熱ロール２０６が接触したケースにおいて、印刷用紙２０１が加熱されることによる熱変形や変色が発生しない程度に短くした時間に設定する。   When the print signal PRINT-P from the host device (not shown) becomes “1”, the electrophotographic apparatus sets the puller driving signal PULLER DRV-P to “1”, the puller direction signal PULLER CCW-P to “1”, and puller driving The puller 210 is driven in the paper transport direction by the unit 211. When PRINT-P becomes “0”, the driving signal PULLER DRV-P signal of the puller 210 is set to “0”, and the puller 210 stops. During the period when the PRINT-P signal is “0”, the printing paper 201 is in a non-printing state. During non-printing, the puller drive signal PULLER DRV-P signal is set to “0”, and after a lapse of T1, the puller drive signal PULLER DRV-P signal is set to “1”, the puller direction signal PULLER CCW-P is set to “1”, and T2 After a lapse of time, the puller driving signal PULLER DRV-P signal is set to “0”. Accordingly, the puller 210 is intermittently operated by repeatedly stopping for T1 time and driving for T2 time, and the slack of the paper between the tractor 203 and the puller 210 can be eliminated. The stop time T1 is set to a time that is short enough to prevent thermal deformation and discoloration due to heating of the printing paper 201 in the case where the printing paper 201 and the heat roll 206 are in contact.

上記に示すように、非印刷中は規定の間隔でプラー２１０を用紙搬送方向へ駆動させることで、トラクタ２０３とプラー２１０間で用紙の弛みが生じることにより印刷用紙２０１と熱ロール２０６が接触して、印刷用紙２０１が加熱されることによる用紙の熱変形や変色を防止することができる。   As described above, during non-printing, the puller 210 is driven in the paper transport direction at a predetermined interval, and the paper sag between the tractor 203 and the puller 210 causes the print paper 201 and the heat roll 206 to contact each other. Thus, thermal deformation and discoloration of the paper due to heating of the printing paper 201 can be prevented.

本発明における用紙搬送制御方法を示すタイムチャートである。6 is a time chart illustrating a paper conveyance control method according to the present invention. 従来の用紙搬送制御方法を示すタイムチャートである。It is a time chart which shows the conventional paper conveyance control method. 従来の用紙搬送制御方法を示すタイムチャートである。It is a time chart which shows the conventional paper conveyance control method. 電子写真装置の概略構成図である。1 is a schematic configuration diagram of an electrophotographic apparatus.

符号の説明Explanation of symbols

２０１は印刷用紙、２０２は感光ドラム、２０３はトラクタ、２０４はバッファ、２０５は用紙搬送ガイド、２０６は熱ロール、２０７は加圧ロール、２０８は転写器、２１０はプラー、２１１はプラー駆動部、２１２はスウィングフィン、２１３はスタッカ、２１４はスタッカ駆動部、２１５はスタッカ上下スイッチ、２１６は搬送部。   201, printing paper, 202, photosensitive drum, 203, tractor, 204, buffer, 205, paper conveyance guide, 206, heat roll, 207, pressure roll, 208, transfer device, 210, puller, 211, puller drive unit, 212 is a swing fin, 213 is a stacker, 214 is a stacker drive unit, 215 is a stacker up / down switch, and 216 is a transport unit.

Claims (2)

感光体上に形成されたトナー像を用紙に転写させる転写器と、前記転写器に対し用紙搬送方向下流側に設けられた用紙搬送トラクタと、該トラクタに対し用紙搬送方向下流側に設けられ、用紙上に転写されたトナー像を加熱・加圧することにより定着するための熱ロール及び加圧ロールと、前記熱ロールと加圧ロールの用紙搬送方向下流側に設けられた搬送ローラ対と、前記用紙搬送トラクタ、前記熱ロールと加圧ロールおよび搬送ローラ対で長尺に連続した用紙を搬送させながら該用紙にトナー像を印刷する電子写真装置の用紙搬送制御方法において、非印刷中の用紙停止時に規定間隔で前記搬送ローラ対を用紙搬送方向へ駆動、停止させ、該停止の時間を、用紙が前記熱ロールにより加熱されることで熱変形する時間より短くしたことを特徴とする電子写真装置の用紙搬送制御方法。 A transfer device for transferring the toner image formed on the photosensitive member to the paper, a paper transport tractor provided downstream of the transfer device in the paper transport direction, and provided downstream of the tractor in the paper transport direction; A heat roll and a pressure roll for fixing the toner image transferred on the paper by heating and pressing; a pair of transport rollers provided on the downstream side of the heat roll and the pressure roll in the paper transport direction; and In a paper conveyance control method of an electrophotographic apparatus that prints a toner image on a sheet while conveying a long continuous sheet of paper by using a sheet conveyance tractor, the heat roll, a pressure roll, and a conveyance roller pair, stopping the sheet during non-printing sometimes driven at a specified interval the pair of conveying rollers to the paper transport direction, is stopped, the time of the stop, that the paper is shorter than the time that heat deformation by being heated by the heat roll Sheet transport controlling method of an electrophotographic apparatus according to symptoms. 感光体上に形成されたトナー像を用紙に転写させる転写器と、前記転写器に対し用紙搬送方向下流側に設けられた用紙搬送トラクタと、該トラクタに対し用紙搬送方向下流側に設けられ、用紙上に転写されたトナー像を加熱・加圧することにより定着するための熱ロール及び加圧ロールと、前記熱ロールと加圧ロールの用紙搬送方向下流側に設けられた搬送ローラ対と、前記用紙搬送トラクタ、前記熱ロールと加圧ロールおよび搬送ローラ対で長尺に連続した用紙を搬送させながら該用紙にトナー像を印刷する電子写真装置において、非印刷中の用紙停止時に規定間隔で前記搬送ローラ対を用紙搬送方向へ駆動、停止させ、該停止の時間を、用紙が前記熱ロールにより加熱されることで熱変形する時間より短くしたことを特徴とする電子写真装置。 A transfer device for transferring the toner image formed on the photosensitive member to the paper, a paper transport tractor provided downstream of the transfer device in the paper transport direction, and provided downstream of the tractor in the paper transport direction; A heat roll and a pressure roll for fixing the toner image transferred on the paper by heating and pressing; a pair of transport rollers provided on the downstream side of the heat roll and the pressure roll in the paper transport direction; and defining the paper conveying tractor, the heat roll and the pressure roll and the transport roller pair Oite electrophotographic equipment for printing a toner image on the paper while conveying the continuous sheet to the long, when the paper stop in the non-printing driving the conveying roller pair spacing the sheet conveying direction, stopping, electrophotographic the time of the stop, characterized in that the paper is shorter than the time you heat deformation by being heated by the heat roll Location.
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