JP2010276930A5

JP2010276930A5 -

Info

Publication number: JP2010276930A5
Application number: JP2009130535A
Authority: JP
Filing date: 2009-05-29
Publication date: 2012-07-12
Anticipated expiration: 2029-05-29

Description

（１）シート材の位置を検知するための検知手段と、前記検知手段の検知結果に基づき、シート材の搬送不良の種類を判定する判定手段と、前記判定手段により判定した前記搬送不良の種類の情報を記憶する記憶手段と、前記搬送不良が発生した際に、前記搬送不良が発生したシート材の位置と前記記憶手段に記憶された前記搬送不良の種類の情報とに応じて、自動排紙動作を行うか否かを判断する制御手段と、を備えることを特徴とする画像形成装置。 (1) a detection means for detecting the position of the sheet material, the basis of the detection result of the detecting means, and determine the constant means you determine the type of conveyance failure of a sheet material, wherein it is determined by the previous SL-size constant means storage means for storing information on the type of conveyance failure, when the prior SL conveyance failure occurs, the said position and said storage means and said conveyance failure type of information stored in the conveyance failure has occurred sheet material in response, the image forming apparatus characterized by comprising a control means for determining whether to perform the self Dohai feed operation.

判定手段であるジャム種判定部３０２は、センサ入力部２０６から、トップセンサ１０６がシート材Ｓ１の先端を検知してから所定時間後に、排紙センサ１１５でシート材Ｓ１の先端を検知できないという情報を伝達された場合には、排紙遅延ジャムと判定する。また、連続印字中では図４に示すように後続紙であるシート材Ｓ２はすでに給紙を開始しており、実際に所定時間後にシート材Ｓ１のジャムを判定した際には、図５に示すような位置関係になる。前述した通り、この状態で画像形成装置外にシート材を自動で排紙する自動排紙動作をしてしまうと、図６のようにジャムとなったシート材Ｓ２（以降、ジャム紙ともいう）を除去するのが困難になるおそれがある。 That jam type determination unit 302 is determine constant means, the sensor input unit 206, the top sensor 106 after detecting the leading edge of the sheet material S1 is after a predetermined time, can not be detected the leading edge of the sheet material S1 is the discharge sensor 115 When the information is transmitted, it is determined as a paper discharge delay jam. Further, during continuous printing, as shown in FIG. 4, the sheet material S2, which is a subsequent sheet, has already started feeding, and when a jam of the sheet material S1 is actually determined after a predetermined time, it is shown in FIG. The positional relationship is as follows. As described above, if an automatic paper discharge operation for automatically discharging the sheet material to the outside of the image forming apparatus is performed in this state, the sheet material S2 jammed as shown in FIG. 6 (hereinafter also referred to as jammed paper). May be difficult to remove.

Claims

Detection means for detecting the position of the sheet material;
And determine the constant means you determine detection result based on the type of conveyance failure of the sheet material of the detecting means,
Storage means for storing the faulty conveyance of the type of information determined by the previous SL-size constant means,
When prior Symbol conveyance failure has occurred, in response to said the position of the conveying sheet material failure occurs and the storage means the conveyance failure of the type of information stored in, whether to perform self Dohai feeding operation Control means for determining
An image forming apparatus comprising: a.

The image forming apparatus according to claim 1.
Wherein if it is determined not to perform the automatic sheet discharging operation, the image forming apparatus and outputs the information to be notified to remove the sheet over preparative material.

The image forming apparatus according to claim 1, wherein
The image forming apparatus, wherein the storage unit is a volatile memory.

The image forming apparatus according to claim 1, wherein
The image forming apparatus, wherein the storage unit is a nonvolatile memory.