Abstract: An image forming apparatus includes a motor, a container detection sensor, and a controller. When a toner container is attached, the motor generates a driving force for rotating a toner conveying member in the toner container. The container detection sensor is arranged at a position where the container detection sensor comes into contact with an outer periphery of a cam connected to the toner conveying member when the toner container is attached. The controller distinguishes between at least three attachment states of the toner container based on a sensor signal of the container detection sensor.

Abstract: An image forming apparatus includes a motor, a container detection sensor, and a controller. When a toner container is attached, the motor generates a driving force for rotating a toner conveying member in the toner container. The container detection sensor is arranged at a position where the container detection sensor comes into contact with an outer periphery of a cam connected to the toner conveying member when the toner container is attached. The controller distinguishes between at least three attachment states of the toner container based on a sensor signal of the container detection sensor.

Abstract: Provided is an image forming apparatus in which a removable storage medium is used, and is an image forming apparatus that is capable of achieving both reduced power consumption and efficient operation. The image forming apparatus has a storage-medium-recognizing unit for recognizing whether or not the storage medium is connected. When the storage-medium-recognizing unit recognizes that the storage medium has been connected while the supply of electric power to a printing-executing unit is stopped in a standby state, electric power is supplied to an operation-receiving unit. After electric power is supplied to the operation-receiving unit, when there is an operation indicating that the printing-executing unit is used, electric power is supplied to the printing-executing unit.

Abstract: An image reading device includes a document sheet conveying portion, an imaging element, a reading processing portion, a detection processing portion, and a stop processing portion. The document sheet conveying portion sequentially conveys a plurality of document sheets placed on a document sheet placement portion. The imaging element is disposed at a document sheet conveyance path. The reading processing portion executes a reading process of reading image data from each of the document sheets placed on the document sheet placement portion. The detection processing portion detects an abnormal image from image data of a document sheet read in the reading process. The stop processing portion, when the detection processing portion has detected the abnormal image, stops the reading process and a power supply to the imaging element, and after an elapse of a predetermined wait time, resumes the power supply to the imaging element, and resumes the reading process.

Abstract: An image reading device includes a document sheet conveying portion, an imaging element, a reading processing portion, a detection processing portion, and a stop processing portion. The document sheet conveying portion sequentially conveys a plurality of document sheets placed on a document sheet placement portion. The imaging element is disposed at a document sheet conveyance path. The reading processing portion executes a reading process of reading image data from each of the document sheets placed on the document sheet placement portion. The detection processing portion detects an abnormal image from image data of a document sheet read in the reading process. The stop processing portion, when the detection processing portion has detected the abnormal image, stops the reading process and a power supply to the imaging element, and after an elapse of a predetermined wait time, resumes the power supply to the imaging element, and resumes the reading process.

Abstract: An image forming apparatus includes a humidity sensor element, a resistor, a clock supply section, a detection section and a determination section. The detection section detects a humidity on the basis of a divided voltage value obtained by the humidity sensor element and the resistor. The determination section acquires the divided voltage value at a first timing within a period from a rising edge to a falling edge of a first clock signal and at a second timing within a period from a falling edge to a rising edge of the first clock signal, and determines, on the basis of the divided voltage values thus acquired, whether or not the humidity detected by the detection section is normal.

Abstract: In a sheet conveying device, a first sensing portion is configured to output a first sense signal when a sheet is absent at a first sensing position determined in advance on a sheet placement portion, and output a second sense signal when the sheet is present at the first sensing position. A second sensing portion is configured to output the second sense signal when the sheet is absent at a second sensing position separated from the first sensing position in a width direction perpendicular to a conveying direction of the sheet, and output the first sense signal when the sheet is present at the second sensing position. A sensing control portion is configured to sense a plurality of states in accordance with a combination of the first sense signal and the second sense signal.

Abstract: In a sheet conveying device, a first sensing portion is configured to output a first sense signal when a sheet is absent at a first sensing position determined in advance on a sheet placement portion, and output a second sense signal when the sheet is present at the first sensing position. A second sensing portion is configured to output the second sense signal when the sheet is absent at a second sensing position separated from the first sensing position in a width direction perpendicular to a conveying direction of the sheet, and output the first sense signal when the sheet is present at the second sensing position. A sensing control portion is configured to sense a plurality of states in accordance with a combination of the first sense signal and the second sense signal.

Abstract: An image forming apparatus includes a humidity sensor element, a resistor, a clock supply section, a detection section and a determination section. The detection section detects a humidity on the basis of a divided voltage value obtained by the humidity sensor element and the resistor. The determination section acquires the divided voltage value at a first timing within a period from a rising edge to a falling edge of a first clock signal and at a second timing within a period from a falling edge to a rising edge of the first clock signal, and determines, on the basis of the divided voltage values thus acquired, whether or not the humidity detected by the detection section is normal.

Abstract: An image forming apparatus, includes an image reader with an original document table. An image reading part has a light source, a light-receiving part, a reflection part, and a carriage that supports the light source or the reflection part. A cover covers a replacement member and is opened/closed integrally with the image reader. A main body accommodates an operation part for performing operations based on image data. An axis connects the image reader to the main body and turnably supports the image reader and the cover in approaching/separating directions with respect to the main body. An open/close detector detects an open/closed state of the image reader and the cover and a movement controller moves the carriage in a sub-scanning direction. When the image reader and the cover are open, the movement controller moves the carriage to a retreat position that is outside the original document table.

Abstract: An image forming apparatus provided with an image forming section, including: a toner density detection section which detect a density of a toner image transferred onto an intermediate transfer member; a density correction section which executes density correction processing of the toner image forming in a case where a density value detected by the density detection section does not satisfy a predetermined condition; a toner remaining amount detector which detects a toner remaining amount of a toner accumulation section; and a determination section which determines that failure has occurred in the exposure section if the density value detected by the density detection section does not satisfy the predetermined condition after the density correction processing executed by the density correction section is terminated, and the toner remaining amount detected by the toner remaining amount detector is greater than a predetermined remaining amount.

Abstract: An image forming apparatus, includes an image reader with an original document table. An image reading part has a light source, a light-receiving part, a reflection part, and a carriage that supports the light source or the reflection part. A cover covers a replacement member and is opened/closed integrally with the image reader. A main body accommodates an operation part for performing operations based on image data. An axis connects the image reader to the main body and turnably supports the image reader and the cover in approaching/separating directions with respect to the main body. An open/close detector detects an open/closed state of the image reader and the cover and a movement controller moves the carriage in a sub-scanning direction. When the image reader and the cover are open, the movement controller moves the carriage to a retreat position that is outside the original document table.

Abstract: An image forming apparatus provided with an image forming section, including: a toner density detection section which detect a density of a toner image transferred onto an intermediate transfer member; a density correction section which executes density correction processing of the toner image forming in a case where a density value detected by the density detection section does not satisfy a predetermined condition; a toner remaining amount detector which detects a toner remaining amount of a toner accumulation section; and a determination section which determines that failure has occurred in the exposure section if the density value detected by the density detection section does not satisfy the predetermined condition after the density correction processing executed by the density correction section is terminated, and the toner remaining amount detected by the toner remaining amount detector is greater than a predetermined remaining amount.