JP2015226239A5

JP2015226239A5 -

Info

Publication number: JP2015226239A5
Application number: JP2014110886A
Authority: JP
Filing date: 2014-05-29
Publication date: 2017-01-12
Anticipated expiration: 2034-05-29

Description

上記目的を達成するために、本発明は、原稿を載置する原稿台と、原稿を前記原稿台の表面に向けて押さえる原稿押さえ手段と、前記原稿押さえ手段の前記原稿台に対する開閉動作を検知する開閉検知手段と、光源から発した光を前記原稿台上の原稿に向けて照射しながら、前記原稿台の表面に沿った副走査方向に移動する移動照射手段と、前記移動照射手段を移動させる駆動力を発揮する駆動源と、原稿面での反射光を受光して原稿の画像を読み取る画像センサーと、前記移動照射手段の移動を制御する制御手段とを備え、前記制御手段が、所定の休止条件の成立に基づいて、前記移動照射手段を副走査方向における待機位置から原稿サイズ検知位置まで移動させてから、前記駆動源に対する電源供給を休止した状態でユーザーからの命令を待つ休止待機処理と、前記休止待機処理の実施中における前記開閉検知手段による開動作の検知に基づいて、前記駆動源への電源供給を再開して前記光源を点灯させながら、前記画像センサーによる読取結果に基づいて原稿の主走査方向における長さを特定する休止後原稿長さ特定処理とを実施するものである画像読取装置において、前記休止後原稿長さ特定処理を開始した時点における前記移動照射手段の副走査方向の位置を推定する位置推定手段を設け、前記位置推定手段による推定結果が副走査方向における前記原稿サイズ検知位置を含む検知可能領域内にない場合には、前記休止後原稿長さ特定処理における長さの特定を中止するか、あるいは、前記休止後原稿長さ特定処理における長さの特定結果を取り消すかする処理を実施するように、前記制御手段を構成したことを特徴とするものである。 To achieve the above object, the present invention detects a document table on which a document is placed, document pressing means for pressing the document toward the surface of the document table, and opening / closing operation of the document pressing means with respect to the document table. An open / close detecting means for moving, a moving irradiation means for moving in a sub-scanning direction along the surface of the original table while irradiating light emitted from a light source toward the original on the original table, and moving the moving irradiation means A drive source that exerts a driving force to be generated, an image sensor that receives reflected light from the document surface and reads an image of the document, and a control unit that controls the movement of the moving irradiation unit. instructions from users of on the basis of the establishment of quiescent conditions, state the moving irradiation means from moving to the standby position or Lagen draft size detection position in the sub-scanning direction, which has suspended the power supply to the drive source Based on detection of the waiting standby processing and the opening / closing operation by the opening / closing detection means during the execution of the standby standby processing, reading by the image sensor while resuming power supply to the drive source and turning on the light source In the image reading apparatus for performing post-pause document length specifying processing for specifying the length of the document in the main scanning direction based on the result, the moving irradiation at the time when the post-pause document length specifying processing is started Position estimating means for estimating the position of the means in the sub-scanning direction is provided, and when the estimation result by the position estimating means is not within the detectable region including the document size detection position in the sub-scanning direction, the post-pause document length The process of canceling the length specification in the length specification process or canceling the length specification result in the post-pause document length specification process is performed. As, it is characterized in that constitutes the control means.

Claims

A document table on which the document is placed; document pressing means for pressing the document toward the surface of the document table; opening / closing detection means for detecting an opening / closing operation of the document pressing means with respect to the document table; and light emitted from a light source. A moving irradiation means that moves in the sub-scanning direction along the surface of the original table while irradiating the original on the original table, a driving source that exerts a driving force for moving the moving irradiation means, and an original surface An image sensor that receives the reflected light from the image and reads an image of the document, and a control unit that controls the movement of the moving irradiation unit, and the control unit performs the moving irradiation based on the establishment of a predetermined pause condition. after moving the unit to the standby position or Lagen draft size detection position in the sub-scanning direction, and the rest waiting process to wait for instructions from the user in a state of suspended power supply to the drive source, the pause waits punished Based on the detection of the opening operation by the open / close detection means during the execution of the document, the power supply to the drive source is resumed and the light source is turned on, and the document is scanned in the main scanning direction based on the reading result by the image sensor In the image reading apparatus for performing the post-pause document length specifying process for specifying the length,
A position estimating unit for estimating a position in the sub-scanning direction of the moving irradiation unit at the time when the document length specifying process after the pause is started;
If the estimation result by the position estimating means is not within the detectable region including the document size detection position in the sub-scanning direction, stop specifying the length in the post-pause document length specifying process, or An image reading apparatus, wherein the control means is configured to perform a process of canceling a length specification result in a document length specifying process after a pause.

The image reading apparatus according to claim 1.
A reference position sensor that detects the moving irradiation means that has moved to a reference position that exists between the standby position and the document size detection position in the sub-scanning direction, and a white solid image for shading correction to the image sensor. In order to read, a white member disposed between the reference position in the sub-scanning direction and the document size detection position is provided,
In the post-pause document length specifying process, the process of acquiring the reading result by the image sensor while moving the moving irradiation unit from the document size detection position toward the standby position is performed. An image reading apparatus comprising a control means.

The image reading apparatus according to claim 2.
The moving irradiation means required until the moving irradiation means is detected by the reference position sensor after the movement irradiation means starts moving toward the standby position in the document length specifying process after the pause. The position estimation unit is configured to perform a process of estimating the position of the moving irradiation unit in the sub-scanning direction at the time when the post-pause document length specifying process is started based on the movement amount of An image reading apparatus.

The image reading apparatus according to claim 3.
When the movement amount is not within a predetermined range, a process of estimating that the position of the moving irradiation unit in the sub-scanning direction at the time when the post-pause document length specifying process is started is not within the detectable region is performed. Thus, an image reading apparatus comprising the control means.

The image reading apparatus according to claim 4.
As the minimum value within the predetermined range, the distance from the reference position to the end of the white member on the side of the document size detection position, and the moving range of the moving irradiation means during the post-pause document length specifying process An image reading apparatus characterized by adopting a value equal to or greater than the total.

The image reading apparatus according to claim 4 or 5,
Based on the detection of the opening operation by the open / close detection means, an opening movement process for moving the moving irradiation means at the standby position to the document size detection position;
Based on the detection of the opening operation by the open / close detection means when the pause / standby process is not being performed, the moving irradiation means is moved from the document size detection position toward the standby position while moving the document in the main scanning direction. A non-pause document length specifying process for specifying the length of the image based on the reading result of the image sensor,
In addition, when the document length specification process is stopped in the post-pause document length specification process, or the length specification result in the post-pause document length specification process is canceled, the reference position sensor detects the document length specification process. An image reading apparatus characterized in that the control means is configured to perform a process of moving the moving irradiation means to the standby position with reference to a detection timing of the moving irradiation means.

The image reading apparatus according to claim 6.
When the document length specification process is stopped in the post-pause document length specification process, or the length specification result in the post-pause document length specification process is canceled, the moving irradiation unit is moved to the standby position. An image reading apparatus characterized in that the control means is configured to execute a process of notifying a message prompting the user to open and close the document pressing means after the movement to the position.

The image reading apparatus according to claim 6 .
In the post-pause document length specifying process, the control is performed so that the moving irradiation unit is moved toward the standby position at a slower speed than in the non-pause document length specifying process. An image reading apparatus comprising means.

An image forming apparatus comprising: an image reading unit that reads an image of a document; and an image forming unit that forms an image on a recording member based on a result of reading the image by the image reading unit.
An image forming apparatus using the image reading apparatus according to claim 1 as the image reading unit.