JP2021080061A5

JP2021080061A5 -

Info

Publication number: JP2021080061A5
Application number: JP2019208333A
Authority: JP
Filing date: 2019-11-18
Publication date: 2022-11-16
Anticipated expiration: 2039-11-18

Description

上記課題を解決するために、本発明の一態様に係る画像読取装置は、原稿が載置される原稿トレイと、前記原稿トレイに載置された原稿を給送方向へ給送する給送ローラと、前記給送方向において前記給送ローラの下流に配置され、給送されるシートを１枚ずつ分離する分離手段と、前記分離手段により分離された原稿の画像を読み取る画像読取部と、前記給送ローラを、前記原稿トレイに載置された原稿の上面に当接する当接位置と、前記当接位置よりも上方であり且つ前記原稿から離間した離間位置との間で昇降させる昇降手段と、前記原稿トレイに載置された原稿の種類として、第１種類の原稿及び前記第１種類よりも坪量の小さい第２種類の原稿を選択するための選択手段と、原稿給送モードとして、前記給送方向に直交する幅方向の長さが同一である複数の原稿を給送する第１モードと、前記幅方向の長さが異なる複数の原稿を給送する第２モードと、を選択的に実行可能な制御手段であって、前記第１モードにおいて複数の原稿を給送する際に、原稿を１枚給送する度に前記給送ローラを前記当接位置と前記離間位置とに移動させ、前記第２モードにおいて複数の原稿を給送する際に、１枚目の原稿の給送開始から最終原稿の給送が完了するまでの期間、前記給送ローラを前記当接位置に保持するように前記昇降手段を制御する制御手段と、を有し、前記制御手段は、前記選択手段により前記第２種類の原稿が選択された場合、前記原稿給送モードに関わらず、原稿を１枚給送する度に前記給送ローラを前記当接位置と前記離間位置とに移動させることを特徴とする。 To solve the above problems, an image reading apparatus according to an aspect of the present invention includes a document tray on which a document is placed, and a feed roller for feeding the document placed on the document tray in a feeding direction. a separating means arranged downstream of the feeding roller in the feeding direction and separating the fed sheets one by one; an image reading section for reading an image of the document separated by the separating means; Lifting means for moving the feed roller between a contact position where the feed roller contacts the upper surface of the document placed on the document tray and a separation position above the contact position and separated from the document. a selection means for selecting a first type of document and a second type of document having a basis weight smaller than the first type as types of documents placed on the document tray; , a first mode for feeding a plurality of documents having the same length in the width direction orthogonal to the feeding direction, and a second mode for feeding a plurality of documents having different lengths in the width direction. Control means that can be selectively executed, wherein when a plurality of documents are fed in the first mode, the feeding roller is moved between the contact position and the separation position each time one document is fed. , and when feeding a plurality of documents in the second mode, the feeding roller is moved to the contact position for a period from the start of feeding the first document until the completion of feeding the last document. and a control means for controlling the elevating means so as to hold the lifting means at the same position, wherein the control means controls the document regardless of the document feeding mode when the second type of document is selected by the selecting means. The feeding roller is moved between the abutment position and the separation position every time one sheet is fed .

Claims

a document tray on which documents are placed;
a feeding roller for feeding the document placed on the document tray in a feeding direction ;
a separating means disposed downstream of the feeding roller in the feeding direction and separating the fed sheets one by one;
an image reading unit that reads an image of the document separated by the separating means;
Lifting means for moving the feed roller between a contact position where the feed roller contacts the upper surface of the document placed on the document tray and a separation position above the contact position and separated from the document. When,
selection means for selecting a first type of document and a second type of document having a basis weight smaller than that of the first type as types of documents placed on the document tray;
As document feeding modes, a first mode for feeding a plurality of documents having the same length in the width direction perpendicular to the feeding direction, and a second mode for feeding a plurality of documents having different lengths in the width direction. 2 mode, wherein when a plurality of documents are fed in the first mode, the feeding roller is moved to the contact position each time one document is fed. and the separated position, and when feeding a plurality of documents in the second mode, the feeding roller a control means for controlling the lifting means so as to hold the at the contact position ;
has
When the second type of document is selected by the selection means, the control means moves the feeding roller to the contact position and the above position every time one document is fed, regardless of the document feeding mode. An image reading device characterized in that it is moved to a separated position .

a document tray on which documents are placed;
a feeding roller for feeding the document placed on the document tray in a feeding direction;
a separating means disposed downstream of the feeding roller in the feeding direction and separating the fed sheets one by one;
an image reading unit that reads an image of the document separated by the separating means;
Lifting means for moving the feed roller between a contact position where the feed roller contacts the upper surface of the document placed on the document tray and a separation position above the contact position and separated from the document. When,
selection means for selecting a first type of document and a second type of document thinner than the first type as types of documents placed on the document tray;
As document feeding modes, a first mode for feeding a plurality of documents having the same length in the width direction perpendicular to the feeding direction, and a second mode for feeding a plurality of documents having different lengths in the width direction. 2 mode, wherein when a plurality of documents are fed in the first mode, the feeding roller is moved to the contact position each time one document is fed. and the separated position, and when feeding a plurality of documents in the second mode, the feeding roller a control means for controlling the lifting means so as to hold the at the contact position;
has
When the second type of document is selected by the selection means, the control means moves the feeding roller to the contact position and the above position every time one document is fed, regardless of the document feeding mode. An image reading device characterized in that it is moved to a separated position.

having an operation unit that accepts user instructions,
3. The image reading apparatus according to claim 1, wherein the document feeding mode is set via the operation section.

3. The image reading apparatus according to claim 1, wherein the document feeding mode is selected according to a detection result of the width of the document in the conveying path.

further comprising a separation sensor for detecting the document downstream of the separation means in the feeding direction;
5. The apparatus according to claim 1, wherein in the first mode, the control means raises the paper feed roller to the separated position based on detection of the leading edge of the document by the separation sensor. 2. The image reading device according to item 1.

6. The method according to claim 5, wherein in the first mode, the control means lowers the feed roller to the contact position based on detection of the trailing edge of the document by the separation sensor. image reader.

a pull-out roller arranged downstream of the separating means in the feeding direction for conveying the document;
a post-withdrawal sensor for detecting the document, disposed downstream of the withdrawing roller in the feeding direction;
has
3. In the first mode, the control means lowers the paper feed roller to the contact position when a predetermined time has elapsed since the leading edge of the document was detected by the post-pull-out sensor. 6. The image reading device according to 5.