JP2006018241A5

JP2006018241A5 -

Info

Publication number: JP2006018241A5
Application number: JP2005157959A
Authority: JP
Filing date: 2005-05-30
Publication date: 2008-04-10
Anticipated expiration: 2025-05-30

Claims

第１の感光体及び第２の感光体と、
前記第１の感光体に駆動力を与える第１駆動部及び前記第２の感光体に駆動力を与える第２駆動部と、
前記第１の感光体と前記第２の感光体間に配置されるベルト及び該ベルトを駆動するベルト駆動部と、
前記第１の感光体が回転すると位置が変化する第１マーク及び前記第２の感光体が回転すると位置が変化する第２マークと、
前記第１マークを検知する第１検知部及び前記第２マークを検知する第２検知部と、
前記第１マークが前記第１検知部を通過するタイミングと前記第２マークが前記第２検知部を通過する時間差を求め、前記第１駆動部を停止してから前記第２駆動部を停止するまでの時間を決定するとともに、前記ベルト駆動部の停止タイミングを前記第１駆動部を停止してから前記第２駆動部が停止するまでの間に停止する制御部と、を含むことを特徴とする画像形成装置。 A first photoreceptor and a second photoreceptor;
A first driving unit that applies driving force to the first photoconductor and a second driving unit that applies driving force to the second photoconductor;
A belt disposed between the first photosensitive member and the second photosensitive member, and a belt driving unit for driving the belt;
A first mark whose position changes when the first photoconductor rotates, and a second mark whose position changes when the second photoconductor rotates;
A first detector for detecting the first mark and a second detector for detecting the second mark;
The timing at which the first mark passes through the first detection unit and the time difference between the second mark passing through the second detection unit are obtained, and the first drive unit is stopped and then the second drive unit is stopped. And a control unit that stops the stop timing of the belt drive unit between the time when the first drive unit is stopped and the time when the second drive unit is stopped. Image forming apparatus.

請求項１に記載の画像形成装置において、
前記第１の感光体は前記第１駆動部から駆動力を受ける第１感光体ギヤを有し、
前記第２の感光体は前記第２駆動部から駆動力を受ける第２感光体ギヤを有し、
前記第１マークは前記第１感光体ギヤの回転に同期して位置が回転移動し、
前記第２マークは前記第２感光体ギヤの回転に同期して位置が回転移動する、ことを特徴とする画像形成装置。 The image forming apparatus according to claim 1 .
The first photosensitive member has a first photosensitive member gear that receives a driving force from the first driving unit,
The second photosensitive member has a second photosensitive member gear that receives a driving force from the second driving unit,
The position of the first mark rotates in synchronization with the rotation of the first photoconductor gear,
2. The image forming apparatus according to claim 1, wherein the position of the second mark rotates in synchronization with the rotation of the second photoconductor gear.

請求項１に記載の画像形成装置において、
前記制御部は、前記第１駆動部の停止とともに前記ベルト駆動部を停止し、その後に前記第２駆動部を停止することを特徴とする画像形成装置。 The image forming apparatus according to claim 1 .
The image forming apparatus, wherein the control unit stops the belt drive unit together with the stop of the first drive unit, and then stops the second drive unit.

請求項１に記載の画像形成装置において、
前記第１マークを持ち、前記第１駆動部から駆動力を受けて前記第１の感光体を回転する第１感光体駆動ギヤと、
前記第２マークを持ち、前記第２駆動部から駆動力を受けて前記第２の感光体を回転する第２感光体駆動ギヤとを持つことを特徴とする画像形成装置。 The image forming apparatus according to claim 1 .
A first photosensitive member driving gear that has the first mark and rotates the first photosensitive member by receiving a driving force from the first driving unit;
An image forming apparatus comprising: a second photosensitive member driving gear which has the second mark and rotates the second photosensitive member by receiving a driving force from the second driving unit.

請求項４に記載の画像形成装置において、
前記制御部は、前記第１駆動部の停止とともに、前記ベルト駆動部を停止し、その後に前記第２駆動部を停止することを特徴とする画像形成装置。 The image forming apparatus according to claim 4 .
The image forming apparatus, wherein the control unit stops the belt driving unit together with the first driving unit, and then stops the second driving unit.

複数の感光体及び該各感光体をそれぞれ回転駆動する複数の駆動部と、
前記複数の感光体に接触するベルトを駆動するベルト駆動部と、
前記各感光体の回転に伴って回転変位する複数の被検出部と、
前記回転変位する各被検出部と同一の定位置で対向すべくそれぞれ配され、該回転変位する各被検出部を対向位置で検出すると検出信号を出力する複数の検出部と、
前記複数の感光体を同時に回転開始させるべく前記複数の駆動部を同時的に駆動制御すると共に前記ベルト駆動部を駆動制御する駆動制御部と、
前記各検出部から検出信号を受信する毎に受信時間差に基づいて前記各感光体の回転位相差を判定し、該回転位相差に対応させて前記各感光体の駆動部を順に停止させる停止制御部と、
停止順が最初の前記駆動部を停止させてから停止順が最後の駆動部を停止させる前に前記ベルト駆動部を停止させるベルト駆動停止部と、
を含むことを特徴とする画像形成装置。 A plurality of photoconductors and a plurality of drive units that respectively rotate and drive the photoconductors;
A belt driving unit that drives a belt that contacts the plurality of photoconductors;
A plurality of detected portions that are rotationally displaced in accordance with the rotation of the respective photoconductors;
A plurality of detectors that are arranged to face each rotationally displaced detected portion at the same fixed position and that output a detection signal when each rotationally displaced detected portion is detected at the opposing position;
A drive control unit that simultaneously drives and controls the plurality of drive units and simultaneously drives and controls the belt drive unit to start rotation of the plurality of photoconductors;
A stop control that determines a rotational phase difference of each photoconductor based on a reception time difference every time a detection signal is received from each detection unit, and sequentially stops the driving unit of each photoconductor in accordance with the rotational phase difference. And
A belt drive stop unit that stops the belt drive unit before stopping the last drive unit after stopping the first drive unit in the stop order; and
An image forming apparatus comprising:

搬送部に配置される複数個の感光体のそれぞれの基準位置を前記感光体の回転中に基準位置検出部によって検出し、該検出結果に基づいて、前記複数個の感光体の回転駆動と前記搬送部の搬送駆動とをそれぞれ所定の時間に停止させて、前記複数個の感光体毎の回転位相差を所定の値に設定する、感光体の位置設定方法であって、
前記基準位置検出部の検出結果に基づいて前記複数個の感光体それぞれの回転駆動停止時間と前記搬送部の搬送駆動停止時間とを設定するドラム・ベルト駆動時間算出手順と、
該ドラム・ベルト駆動時間算出手順の算出結果に基づいて前記いずれかの感光体の駆動停止タイミングに対応させて前記搬送部の搬送駆動を停止させる駆動停止手順とを備えることを特徴とする感光体の位置設定方法。 A reference position detection unit detects a reference position of each of the plurality of photoconductors arranged in the transport unit, and the rotation of the plurality of photoconductors is detected based on the detection result. and a transfer drive of the transport unit, respectively is stopped during the time of predetermined, set the rotational phase difference of the plurality of photoreceptor each to a predetermined value, a position setting method of the photosensitive member,
And the drum-belt drive time calculating procedure for setting a between time transport driving stop of the transport section and during the time of the plurality of photoreceptor respective rotary drive stopped based on the detection result of the reference position detection unit,
And a drive stop procedure for stopping the transport drive of the transport unit in accordance with the drive stop timing of any of the photoconductors based on the calculation result of the drum / belt drive time calculation procedure. Position setting method.

請求項７に記載の感光体の位置設定方法に於いて、
前記ドラム・ベルト駆動時間算出手順は、
前記基準位置検出部が最初に前記基準位置を検出した感光体を基準回転駆動停止時間に設定し、続いて基準位置を検出した感光体の順番に回転駆動停止時間を設定することを特徴とする感光体の位置設定方法。 In the photoconductor position setting method according to claim 7 ,
The drum belt driving time calculation procedure is as follows:
Wherein the reference position detecting section initially detects said reference position photoreceptor set between the time of reference rotation driving stop, followed by set between during rotation drive stop in the order of the detected photoconductor reference position A method for setting the position of the photosensitive member.

請求項７に記載の感光体の位置設定方法に於いて、
前記ドラム・ベルト駆動時間算出手順は、
前記基準回転駆動停止時間を設定する感光体を、位相差設定の度毎に変更し、回転駆動停止時間を設定することを特徴とする感光体の位置設定方法。 In the photoconductor position setting method according to claim 7 ,
The drum belt driving time calculation procedure is as follows:
The photoreceptor for setting between the time the reference rotational driving stop, change each time the phase difference setting, position setting method of the photosensitive body and sets between the time of rotation driving stop.

請求項７に記載の感光体の位置設定方法に於いて、
前記ドラム・ベルト駆動時間算出手順は、
前記複数個の感光体の内、最も累積回転数の少ない感光体を選択し、前記基準回転駆動停止時間を設定することを特徴とする感光体の位置設定方法。 In the photoconductor position setting method according to claim 7 ,
The drum belt driving time calculation procedure is as follows:
Wherein among the plurality of photoreceptors, and select the most accumulated rotation number less photoconductor positioning method of the photosensitive body and sets between the reference rotation drive stop.

請求項７から請求項１０までの何れか一項に記載の感光体の位置設定方法に於いて、
前記ドラム・ベルト駆動時間算出手順は、
前記複数個の感光体の回転駆動停止時間の中で、最も早い回転駆動停止時間と最も遅い回転停止時間とを除いた回転駆動停止時間の中で、最も早い回転駆動停止時間と最も遅い回転停止時間との間に前記搬送部の停止時間を設定することを特徴とする感光体の位置設定方法。 The method for setting the position of a photoconductor according to any one of claims 7 to 10 ,
The drum belt driving time calculation procedure is as follows:
In between the time of rotation driving stop of the plurality of photosensitive body, in between the rotary drive stopped except for a while at the slowest rotation and stopping during the earliest rotary drive stopped, while the earliest rotation drive stop When the slowest rotational position setting method of the photosensitive body and sets between the stop of the conveying section between the stop between.

請求項７に記載の感光体の位置設定方法に於いて、
前記ドラム・ベルト駆動時間算出手順の算出結果に基づいて、
前記複数個の感光体の回転量（回転速度×回転時間）を算出し、前記複数個の感光体毎に、それぞれの回転量を維持しながら前記回転速度を変更するドラム速度変更手順、及び、前記搬送部の移動量（移動速度×移動時間）を算出し、該移動量を維持しながら、前記移動速度を変更するベルト速度変更手順の少なくとも一方を更に備えることを特徴とする感光体の位置設定方法。 In the photoconductor position setting method according to claim 7 ,
Based on the calculation result of the drum belt driving time calculation procedure,
A drum speed changing procedure for calculating a rotation amount (rotation speed × rotation time) of the plurality of photoconductors and changing the rotation speed while maintaining the rotation amount for each of the plurality of photoconductors, and The position of the photosensitive member further comprising at least one of a belt speed changing procedure for calculating a moving amount (moving speed × moving time) of the transport unit and changing the moving speed while maintaining the moving amount. Setting method.