Ricoh Company, Ltd.

Ryohhei Ohya

Yuuki Shiga

Yu Wakabayashi

Yasuhide Fukushima

Kenji Tomita

A sheet conveying device includes a conveyor, a curved conveyance passage, a conveyance sensor, and processing circuitry. The conveyor conveys a sheet. The sheet is conveyed by the conveyor along the curved conveyance passage. The conveyance sensor detects a presence of the sheet and is disposed at a curved position of the conveyance passage. The processing circuitry determines clogging of the sheet from an output result of the conveyance sensor. When a specific type of the sheet is conveyed, the processing circuitry stops determination of clogging of the sheet for a period of time from when the conveyance sensor detects passage of a leading end of the sheet to when a trailing end of the sheet passes the conveyance sensor.

Sheet conveying device and image forming apparatus incorporating the same

A drive transmission device includes a drive train including a plurality of drive transmitters, and a container. The plurality of drive transmitters of the drive train transmit a driving force of a drive source to a rotator rotatable around a shaft and a swing member rotatable around a shaft different from the shaft of the rotator. The container contains the drive train.

Drive transmission device, drive unit, and image forming apparatus

A sheet conveying device includes a pair of rollers, a biasing member, a guide member, a biasing support, and a biasing force changer. The pair of rollers includes a first roller and a second roller disposed in contact with the first roller. The pair of rollers is configured to hold a sheet between the first roller and the second roller. The biasing member is configured to bias the first roller toward the second roller. The biasing support is configured to support the biasing member and has a guide target member configured to slide along the guide member to move the biasing support. The biasing force changer is configured to change a biasing force of the biasing member along with movement of the biasing support. The guide target member has a portion projecting into a sheet conveyance passage through which the sheet is conveyed by the pair of rollers.

Sheet conveying device and image forming apparatus incorporating the sheet conveying device

A sheet conveying device includes a pair of rollers including a first roller and a second roller to hold a sheet conveyed between the first and second rollers; a biasing member to bias the first roller toward the second roller; a biasing force changer to change a biasing force of the biasing member; control circuitry to, when a predetermined changing condition is met, cause the changer to change the biasing force and cause the rollers to convey the sheet; an operation detector to detect a changing operation of the changer; and a notification device to notify an abnormality of the changing operation when the operation detector detects the abnormality. When the operation detector detects the abnormality, the control circuitry performs sheet conveyance control to cause the rollers to convey the sheet without causing the changer to change the biasing force, regardless of whether the predetermined changing condition is met.

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Kanagawa, Japan

Ryohhei Ohya