JP2021080089A5

JP2021080089A5 -

Info

Publication number: JP2021080089A5
Application number: JP2019211144A
Authority: JP
Filing date: 2019-11-22
Publication date: 2022-11-16

Description

上記目的を達成するための本発明に係るシート給送装置の代表的な構成は、シートが積載される積載部と、前記積載部に積載されたシートをピックアップするピックアップローラと、前記ピックアップローラによりピックアップされたシートを給送する給送部材と、前記給送部材に圧接してニップ部を形成し、前記ニップ部において前記給送部材により給送されるシートを一枚ずつに分離する分離ローラと、前記分離ローラを回転可能に軸支する軸と、前記ピックアップローラによりピックアップされたシートを前記ニップ部に案内する案内部と、前記軸を保持する保持部と、を含む分離ローラユニットと、回動可能に設けられ、前記分離ローラユニットを着脱可能に支持する装着部と、前記装着部を付勢する付勢部材と、を備え、前記分離ローラは、前記付勢部材が前記装着部を付勢することによって、前記給送部材に押圧されることを特徴とする。 A representative configuration of the sheet feeding apparatus according to the present invention for achieving the above object is a stacking section on which sheets are stacked, a pickup roller for picking up the sheets stacked on the stacking section, and the pickup roller. a feeding member that feeds the picked -up sheet; and a separation roller that presses against the feeding member to form a nip portion, and separates the sheets fed by the feeding member one by one at the nip portion. a separation roller unit including a shaft that rotatably supports the separation roller, a guide portion that guides the sheet picked up by the pickup roller to the nip portion, and a holding portion that holds the shaft; A mounting portion that is rotatably provided and detachably supports the separation roller unit ; It is characterized by being pressed against the feeding member by urging .

Claims

a stacking unit on which sheets are stacked;
a pickup roller that picks up the sheets stacked on the stacking unit;
a feeding member that feeds the sheet picked up by the pickup roller ;
a separation roller that presses against the feeding member to form a nip portion and separates the sheets fed by the feeding member one by one in the nip portion; and a shaft that rotatably supports the separation roller. a separation roller unit including : a guide portion that guides the sheet picked up by the pickup roller to the nip portion; and a holding portion that holds the shaft;
a mounting portion that is rotatably provided and detachably supports the separation roller unit ;
a biasing member that biases the mounting portion;
with
The sheet feeding device , wherein the separating roller is pressed against the feeding member by the biasing member biasing the mounting portion .

2. The sheet feeding device according to claim 1, wherein the mounting portion is formed with a groove into which the shaft is fitted.

3. The sheet feeding apparatus according to claim 1, wherein the separation roller unit has a positioning portion for positioning with respect to the mounting portion.

4. The mounting section according to any one of claims 1 to 3, wherein the mounting section includes a guide member arranged upstream of the separation roller mounted on the mounting section in the feeding direction and guiding the sheet to the nip section. 1. A sheet feeding device according to claim 1.

5. The sheet feeding device according to claim 4 , wherein the guide member has an inclined surface that is inclined so that the position thereof becomes higher toward the downstream side in the feeding direction.

6. The sheet feeding device according to claim 1, wherein a torque limiter is attached to a position adjacent to the separation roller on the shaft in the direction of the rotation axis of the shaft.

7. The sheet feeding device according to claim 1, wherein the guide portion is a sheet-like member.

The sheet feeding apparatus according to any one of claims 1 to 7, wherein the separation roller unit includes a gripping portion to be gripped by an operator.

an image reading unit for reading an image of a sheet;
The sheet feeding device according to any one of claims 1 to 8 , which feeds the sheet toward the image reading unit;
An image reading device comprising:

an image forming unit that forms an image;
The sheet feeding device according to any one of claims 1 to 8 , which feeds sheets toward the image forming unit;
An image forming apparatus comprising: