JP2014052522A5

JP2014052522A5 -

Info

Publication number: JP2014052522A5
Application number: JP2012197072A
Authority: JP
Filing date: 2012-09-07
Publication date: 2015-10-29
Anticipated expiration: 2032-09-07

Description

シートＳの先端が、回転を停止しているレジストローラ対１４に突き当たって一旦シートＳの搬送が停止され、シートＳに撓みが生じる。これによって、シートＳの先端の斜行が矯正される。その後、後述する中間転写ベルト４ａの回転と画像書き出し位置とが同期するタイミングで、シートＳはレジストローラ対１４の回転によって、後述の駆動ローラ４ｂおよび二次転写ローラ４ｃで規定される二次転写部に搬送される。 The leading edge of the sheet S abuts against the registration roller pair 14 that has stopped rotating, and the conveyance of the sheet S is temporarily stopped, causing the sheet S to bend. As a result, the skew of the leading edge of the sheet S is corrected. Thereafter, at the timing when the rotation of the intermediate transfer belt 4a (described later) and the image writing position are synchronized, the sheet S is subjected to secondary transfer defined by the drive roller 4b and the secondary transfer roller 4c ( described later) by the rotation of the registration roller pair 14. It is conveyed to the part .

プロセスカートリッジ５ａ〜５ｄは印字タイミングに合わせて順次駆動し、その駆動に応じて感光ドラム６ａ〜６ｄが図中時計回り方向に回転する。レーザスキャナ９に備えられたポリゴンミラー（図示せず）が回転を始めると、帯電装置７ａ〜７ｄは感光ドラム６ａ〜６ｄの表面を一様に帯電する。 The process cartridges 5a to 5d are sequentially driven in accordance with the printing timing, and the photosensitive drums 6a to 6d are rotated in the clockwise direction in the drawing in accordance with the driving. When a polygon mirror (not shown) provided in the laser scanner 9 starts to rotate, the charging devices 7a to 7d uniformly charge the surfaces of the photosensitive drums 6a to 6d.

カラートナー像が転写されたシートＳは駆動ローラ４ｂによって分離されて定着器１５に搬送される。シートＳは定着器１５に備えられた定着ローラ対（図示せず）によって搬送されつつ、熱および圧力が加えられる。これによって、カラートナー像がシートＳの表面に定着される。 Sheet S on which the color toner image has been transferred is conveyed to the fixing unit 15 is thus separated into the driving roller 4 b. While the sheet S is conveyed by a pair of fixing rollers (not shown) provided in the fixing device 15, heat and pressure are applied. As a result, the color toner image is fixed on the surface of the sheet S.

なお、プリントおよび後処理をオンラインで行う際には、図示のように、シート後処理装置１Ｃがプリンタ本体１の横に並列して配置される。そして、プリンタ本体１の排出ローラ対１８とシート後処理装置１Ｃに備えられた搬入ローラ対２０を連絡する中継搬送装置３がプリンタ本体１の排出トレイ１７に対して略水平に装着される。 When printing and post-processing are performed online, the sheet post-processing apparatus 1C is arranged in parallel with the printer main body 1 as illustrated. The relay conveyance device 3 that connects the discharge roller pair 18 of the printer main body 1 and the carry-in roller pair 20 provided in the sheet post-processing apparatus 1C is mounted substantially horizontally on the discharge tray 17 of the printer main body 1.

中継搬送装置３は、第１および第２の搬送ガイド２０および２１を所定の距離だけ離間した状態に保って係止する係止機構（係止手段）を有している。そして、係止機構によって、後述するように第２の搬送ガイド２１の開閉操作が行われる。 The relay conveyance device 3 has a locking mechanism (locking means) that locks the first and second conveyance guides 20 and 21 while keeping them separated by a predetermined distance. Then, as described later, the opening / closing operation of the second transport guide 21 is performed by the locking mechanism.

いま、図５（ａ）に示すように、スライド板３０が図中左側に位置すると、金属ローラ２３はバネ（図示せず）による第１の押圧力のみでその位置が保持される。その結果、金属ローラ２３は、シートＳが通過する際に離間する離間方向に弾性ローラ２２から逃げることができる（第１の押圧状態）。 As shown in FIG. 5A, when the slide plate 30 is positioned on the left side in the drawing, the position of the metal roller 23 is held only by the first pressing force by a spring (not shown). As a result, the metal roller 23 can escape from the elastic roller 22 in the separating direction that separates when the sheet S passes (first pressing state).

一方、図５（ｂ）に示すように、スライド板３０が図中右側に移動すると、金属ローラ２３の下側に接触しているスライド板３０の付勢部４２によって、金属ローラ２３の位置が固定されることになる。この結果、金属ローラ２３は弾性ローラ２２から離間する離間方向に逃げることができなくなって、金属ローラ２３と弾性ローラ２２との軸間の距離が固定され、第１の押圧力よりも大きい第２の押圧力を保つことができる（第２の押圧状態）。 On the other hand, as shown in FIG. 5B, when the slide plate 30 moves to the right side in the figure, the position of the metal roller 23 is moved by the urging portion 42 of the slide plate 30 contacting the lower side of the metal roller 23. It will be fixed. As a result, the metal roller 23 cannot escape in the separating direction away from the elastic roller 22, and the distance between the axes of the metal roller 23 and the elastic roller 22 is fixed, and the second greater than the first pressing force. Can be maintained (second pressing state).

続いて、ＣＰＵ３０１は予め定められた時間以内にカール補正制御ＨＰセンサ４０がＯＮしたか否かを判定する（Ｓ１１０３）。この予め定められた時間とは、カム３５が１周する時間にマージンを加えた時間である。カール補正制御ＨＰセンサ４０がＯＮしていると（Ｓ１１０３において、ＹＥＳ）、ＣＰＵ３０１は弾性ローラ２２と金属ローラ２３とが正常に当接したと判断し、故障が発生していないとしてカール補正制御モータ２００を停止する（Ｓ１０１４）。シートが中継搬送装置へ到達してもカール補正制御モータ２００は停止したままとなる。そして、ＣＰＵ３０１は画像形成部３２０を制御してプリント処理を行って（Ｓ１１０５）、プリントを終了する。 Subsequently, the CPU 301 determines whether or not the curl correction control HP sensor 40 is turned on within a predetermined time (S1103). The predetermined time is a time obtained by adding a margin to the time that the cam 35 makes one round. When the curl correction control HP sensor 40 is ON (YES in S1103), the CPU 301 determines that the elastic roller 22 and the metal roller 23 are in normal contact, and determines that no failure has occurred and the curl correction control motor. 200 is stopped ( S1014 ). Even when the sheet reaches the relay conveyance device, the curl correction control motor 200 remains stopped. Then, the CPU 301 controls the image forming unit 320 to perform print processing (S1105), and ends printing.

続いて、ＣＰＵ３０１は所定の時間以内にカール補正制御ＨＰセンサ４０がＯＦＦとなったか否かを判定する（Ｓ１２０３）。この所定の時間とは、カム３５が１周する時間にマージンを加えた時間である。カール補正制御ＨＰセンサ４０がＯＦＦとなると（Ｓ１２０３において、ＹＥＳ）、ＣＰＵ３０１はカール補正制御モータ２００を停止して（Ｓ１２０４）、処理を終了する。 Subsequently, the CPU 301 determines whether or not the curl correction control HP sensor 40 is turned off within a predetermined time (S1203). This predetermined time is the time obtained by adding a margin to the time the cam 35 rotates one round. When curl correction control HP sensor 40 is turned off (YES in S1203), CPU 301 stops curl correction control motor 200 (S1204) and ends the process.

押圧機構がロック状態であると（Ｓ１３０３において、ＹＥＳ）、ＣＰＵ３０１は、ジャムの発生とは別に、押圧機構の故障により画像形成の再開ができず、押圧機構の故障修理を行うべきである旨の通知を操作部３３０に画面表示する（Ｓ１３０４）。そして、ＣＰＵ３０１はその後の画像形成動作（プリントジョブなど）を禁止して、処理を終了する。 If the pressing mechanism is in the locked state (YES in S1303), the CPU 301 indicates that, apart from the occurrence of a jam, the image formation cannot be restarted due to the failure of the pressing mechanism, and the pressing mechanism should be repaired. The notification is displayed on the screen of the operation unit 330 (S1304). Then, the CPU 301 prohibits the subsequent image forming operation (print job or the like) and ends the processing.

Claims

Image forming means for forming an image on a sheet;
Jam detecting means for detecting a jam of a sheet in a conveyance path along which a sheet on which an image is formed by the image forming means is conveyed;
A cover that is opened and closed to remove a sheet when a jam occurs in the conveyance path;
Locking means for locking the cover in a closed state;
An anomaly detecting means for detecting an anomaly that is not unlocked by the locking means;
A control unit that permits execution of image formation in which a sheet is conveyed along the conveyance path if an abnormality that the lock is not released is detected by the abnormality detection unit and a jam is not detected by the jam detection unit;
An image forming apparatus comprising:

When the abnormality that the unlocking is not released by the abnormality detecting unit is detected and the jam is detected by the jam detecting unit, the control unit notifies that the image formation cannot be resumed because the lock is not released. The image forming apparatus according to claim 1.

A first pressing state that is arranged in the conveyance path and causes the first correction roller and the second correction roller to contact each other with a first pressing force or a second pressing force that is larger than the first pressing force. A curl correcting unit that includes a pressing unit configured to be in a second pressing state to be brought into contact, and corrects curl generated on the sheet by setting the first correction roller and the second correction roller to the second pressing state. Have
The locking means locks the cover in a closed state when the first correction roller and the second correction roller are in the second pressing state, and the first correction roller and the second correction roller. The image forming apparatus according to claim 1, wherein the lock is released when a roller is in the first pressing state.

The abnormality detecting means further detects an abnormality that cannot be locked by the locking means,
When the abnormality detecting unit detects an abnormality that cannot be locked by the locking unit, if the jam detecting unit does not detect a jam, the control unit executes image formation in which the sheet is conveyed on the conveyance path. The image forming apparatus according to claim 1, further comprising:

In the case where an abnormality that cannot be locked by the locking means is detected by the abnormality detecting means, and a jam is detected by the jam detecting means, the control means may not be able to solve the abnormality that cannot be locked by the locking means. 3. The image forming apparatus according to claim 2, wherein when the jam is resolved, execution of image formation in which the sheet is conveyed along the conveyance path is permitted.

A change unit that changes the first correction roller and the second correction roller from the second pressing state to the first pressing state when the image forming job is completed;
The image forming apparatus according to claim 3, wherein the abnormality detecting unit detects whether or not an abnormality that the lock by the locking unit is not released occurs when the image forming job is completed.

The abnormality detecting means further detects an abnormality that cannot be locked by the locking means,
When a jam is detected by the jam detection means, if an abnormality that the lock by the lock means is not released is detected by the abnormality detection means, it is notified that the lock means has failed, and the abnormality detection means The image forming apparatus according to claim 1, further comprising a notifying unit that notifies the occurrence of a jam if an abnormality that cannot be locked by the locking unit is detected.

Image forming means for forming an image on a sheet;
The first pressing state in which the first correction roller and the second correction roller are brought into contact with the first pressing force or the first correction roller is disposed in a conveyance path along which the sheet on which an image is formed by the image forming unit is conveyed. A pressing unit configured to be in a second pressing state that is brought into contact with a second pressing force that is greater than the pressing force of 1, and the first correction roller and the second correction roller are set to the second pressing state. Curl correcting means for correcting the curl generated in the sheet,
A jam detecting means for detecting a jam of the sheet in the conveyance path;
An abnormality detection means for detecting an abnormality in which the first correction roller and the second correction roller do not change from the second pressing state to the first pressing state;
Control that permits execution of image formation in which a sheet is conveyed on the conveyance path when an abnormality that does not cause the first pressing state is detected by the abnormality detection unit and a jam is not detected by the jam detection unit Means,
An image forming apparatus comprising:

When the abnormality that does not become the first pressing state is detected by the abnormality detection unit and a jam is detected by the jam detection unit, the control unit notifies that the image formation cannot be resumed due to the abnormality. 9. The image forming apparatus according to claim 8, wherein:

The abnormality detection means further detects an abnormality in which the first correction roller and the second correction roller do not change from the first pressing state to the second pressing state,
When the abnormality detection unit detects an abnormality that does not result in the second pressing state, the control unit executes image formation in which a sheet is conveyed on the conveyance path if the jam detection unit does not detect a jam. 9. The image forming apparatus according to claim 8, wherein the image forming apparatus is permitted.

When the abnormality that does not enter the second pressing state is detected by the abnormality detecting unit and the jam is detected by the jam detecting unit, the control unit does not eliminate the abnormality that does not enter the second pressing state. The image forming apparatus according to claim 10, wherein when the jam is resolved, execution of image formation in which the sheet is conveyed along the conveyance path is permitted.

The abnormality detection means further detects an abnormality in which the first correction roller and the second correction roller do not enter the second pressing state from the first pressing state,
When a jam is detected by the jam detection means, if an abnormality that does not result in the first pressing state is detected by the abnormality detection means, it is notified that the curl correction means is faulty, and the abnormality detection means The image forming apparatus according to claim 8, further comprising a notifying unit that notifies the occurrence of a jam if an abnormality that does not cause the second pressing state is detected.

A change unit that changes the first correction roller and the second correction roller from the second pressing state to the first pressing state when the image forming job is completed;
9. The image forming apparatus according to claim 8, wherein the abnormality detection unit detects whether or not an abnormality that does not result in the first pressing state occurs when an image forming job is completed.

An image forming apparatus comprising: a cover that is opened and closed to remove a sheet when a sheet jam occurs on a conveyance path through which a sheet on which an image is formed is conveyed; and a lock unit that locks the cover in a closed state. In the control method,
An abnormality detection step of detecting an abnormality in which the lock by the locking means is not released;
A storage step of storing in the storage means that an abnormality has been detected by the abnormality detection step;
If it is detected that an abnormality has been detected in the storage means when a sheet jam is detected, the occurrence of a jam is informed and the storage means stores an abnormality detected. An informing step for informing a failure of the locking means;
A control method for an image forming apparatus, comprising:

From a first pressing state in which the first correction roller and the second correction roller are brought into contact with the first pressing force, or the first pressing force, which is disposed in the transport path on which the sheet on which the image is formed is transported. Pressing means for bringing the second correction state into contact with the second pressing force having a larger second pressing force, and bringing the first correction roller and the second correction roller into the second pressing state to the sheet. In a control method of an image forming apparatus having a curl correction unit for correcting a generated curl,
An abnormality detection step of detecting an abnormality in which the first correction roller and the second correction roller do not change from the second pressed state to the first pressed state;
A storage step of storing in the storage means that an abnormality has been detected by the abnormality detection step;
If it is detected that an abnormality has been detected in the storage means when a sheet jam is detected, the occurrence of a jam is informed and the storage means stores an abnormality detected. An informing step for informing a failure of the curl correcting means;
A control method for an image forming apparatus, comprising: