Toner supplying device and image forming apparatus having a projection which interacts with a depression of a toner container to prevent adhering of toner to an interior of the toner container

Abstract

A toner supplying device includes: a toner container that is tubular, includes a spiral groove at an outer circumferential face, a toner discharge opening at one end in a longitudinal direction, and a depression at the other end in the longitudinal direction, and is rotationally driven to convey toner contained in the toner container along the spiral groove in the longitudinal direction to discharge the toner from the toner discharge opening; a rotational driving unit that engages with the one end of the toner container to rotationally drive the toner container to cause the toner container to discharge the toner; and a projection provided at an interior portion at which the toner container is installed, and having an inclination in which a projection amount increases toward downstream in a rotational direction of the toner container. The projection is formed to fall in the depression of the toner container.