Kyocera Document Solutions Patente

A sheet conveying device includes a motor (27A), a first determination processing portion (52), and a first restriction processing portion (53). The motor (27A) is used to convey a sheet. The first determination processing portion (52) determines, each time a predetermined determination timing arrives during drive of the motor (27A), whether or not a total drive time of the motor (27A) in a predetermined determination period (Z10) up to the arrival of the determination timing exceeds a predetermined first time (X1). The first restriction processing portion (53) restricts the drive of the motor (27A) when the first determination processing portion (52) determines that the total drive time exceeds the first time (X1).

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A sheet conveying device (10) includes: a conveying roller pair (23A, 23B); a resist roller pair (80); a sheet sensor (61); a resist control unit (95) that controls rotational driving of the resist roller pair, and a conveying speed control unit (96). The conveying speed control unit controls, on the basis of an elapsed time from predetermined writing timing at which light scanning on a photoreceptor drum included in an image forming unit (14) starts to leading edge detection timing at which the sheet sensor detects a leading edge of a sheet, a rotational speed of the conveying roller pair such that a feeding amount of the sheet after the leading edge detection timing is a predetermined reference conveying amount.

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A sheet conveying device (10) includes: a first conveying roller (91A); a second conveying roller (92A); a sheet sensor (51); and a speed control unit (106) that controls a conveying speed of a sheet by each of the first conveying roller and the second conveying roller, the speed control unit being configured to change, where a leading edge of a second sheet has not been detected at a reference time point, the conveying speed by the first conveying roller from an initial speed to a high speed faster than the initial speed, maintain the conveying speed by the second conveying roller at the initial speed, determine return timing on the basis of a second elapsed amount, and return the conveying speed by the first conveying roller from the high speed to the initial speed at the determined return timing.

A consumables ordering system (20) includes a communication device (23), a storage device (24), and a control device (25). The communication device (23) communicates with an external device. In the storage device (24), a predetermined destination is stored. The control device (25) includes a processor, and acts as an automatic ordering device (25A) that places an order for consumables to be used in an electronic device (30, 40), when the processor executes a consumables ordering program (24A). The automatic ordering device (25A) sends, when ordering of the consumables has failed, ordering failure information indicating that the ordering of the consumables has failed, to a predetermined destination via the communication device (23).

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An image forming apparatus (1) includes a body housing (3), an opening and closing unit 821), an image carrier (15B), a transfer roller (152), a power supply line (23), a power supply line side contact (23C), and a transfer roller side contact (21C). The body housing (3) has an opening (3A). The opening and closing unit (21) can be opened and closed in the opening (3A) . The image carrier (15B) is provided in the body housing (3). The transfer roller (152) is provided in the opening and closing unit (21) . The power supply line (23) includes a first contact (231), and a second contact (232). The opening and closing unit (21) includes a contact portion (21T) which comes into contact with the second contact (232) and moves the second contact (232). The contact portion (21T) makes the second contact (232) come into contact with the first contact (231) when the opening and closing unit (21) is closed, and makes the second contact (232) separate from the first contact (231) when the opening and closing unit (21) is opened.

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A developing device (40) includes a developer container (50), a conveying member (42), and a developer carrying member (44). The conveying member (42) has a rotation shaft (42a), a conveying blade (42b), a cut portion (42c), and a dispersing portion (42e). In the cut portion (42c), the conveying blade (42b) is partly cut off along the longitudinal direction of the developer container (50). The dispersing portion (42e) is formed on an outer circumferential part of the rotation shaft (42a), so as to face the cut portion (42c), and extends along the radial direction of the rotation shaft (42a). The dispersing portion (42e) has a dispersing surface (42f) having an area larger than the sectional area of the conveying blade (42b).

A fixing device (20) includes: an endless fixing belt (21); a pressure roller (22) capable of being brought into tight contact against the fixing belt (21); a heater (23) which is provided on an inside of the fixing belt (21), receives through the fixing belt (21) a pressure due to tight contact against the pressure roller (22), and heats the fixing belt (21); a support sheet metal (25) which is provided in an interior of the fixing belt (21) and supports the heater (23); a first conductive member (33), a second conductive member (34), and a resistive element (35). The first conductive member (33) contacts an end of the support sheet metal (25) projecting laterally beyond an edge of the fixing belt (21). The second conductive member (34) contacts an end of the pressure roller (22). The first conductive member (33) is engaged and connected to the second conductive member (34) and the second conductive member (34) is connected through the resistive element (35) to a body (2) to which the fixing device (20) is mounted.

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