Canon Kabushiki Kaisha

Seiji Nishizawa

Masaki Omori

An image reading apparatus includes a first opening/closing unit to openably and closeably support a sheet conveyance portion with respect to an image reading portion, and a second opening/closing unit to openably and closeably support the sheet conveyance portion with respect to the image reading portion. The first opening/closing unit includes a first spring to urge the sheet conveyance portion in a direction in which the sheet conveyance portion moves from a closed position toward an opened position, and the second opening/closing unit includes a second spring to urge the sheet conveyance portion in the direction in which the sheet conveyance portion moves from the closed position toward the opened position and an oil damper to attenuate vibration energy of the sheet conveyance portion. The first opening/closing unit does not include an oil damper.

Image reading apparatus and image forming apparatus

A document reading apparatus includes a document supporting portion, a conveyance portion, a driving motor, an image reading unit, and a control portion. The control portion is configured to execute a high speed mode in which the conveyance speed is set to a first conveyance speed and a low speed mode in which the conveyance speed is set to a second conveyance speed slower than the first conveyance speed. When the control portion executes the low speed mode, if the document has a first thickness, the control portion is configured to execute a first low speed mode where a first drive speed is set to the driving motor. If the document has a second thickness thicker than the first thickness, the control portion is configured to execute a second low speed mode where a second drive speed faster than the first drive speed is set to the driving motor.

Document reading apparatus and image forming apparatus

A sheet conveying apparatus includes: a feeding unit configured to feed a sheet member; a conveying roller that is provided downstream of the feeding unit in a conveying direction, and that is configured to convey the sheet member fed by the feeding unit downstream in the conveying direction; a motor configured to drive the conveying roller. In a state where the conveying roller is conveying a first sheet member that was fed by the feeding unit, if a value of a torque current component of a drive current flowing in a winding of the motor changes from a value greater than or equal to a predetermined value to a value less than the predetermined value, the feeding unit starts feeding of a second sheet member that is to be fed after the first sheet member.

Sheet conveying apparatus that feeds sheet members, and document reading apparatus and image forming apparatus that include the sheet conveying apparatus

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Toride, Japan

Seiji Nishizawa