| 摘要 |
PROBLEM TO BE SOLVED: To provide a toner storage container that can supply toner to a developing device even when the remaining amount of toner in the toner storage container is reduced.SOLUTION: A toner storage container 32 includes a conveyance part 614 that conveys toner to the other end where a container opening 33a is provided, and a pumping part 304 that brings up the toner conveyed by the conveyance part from a lower part to an upper part of the container body and moves the toner toward a toner receiving port of a conveyance tube. An interparticle force (Fp) of the toner when compressed at 160kN/msatisfies 8nN≤Fp≤110nN; the container body includes a projection projecting from the inside of the container body ar the container opening toward one end; the pumping part includes a pumping wall surface 304f extending from a wall surface in the container body toward the projection and a curved part curved along the projection; and when the toner storage container is attached to the toner conveyance device, the projection is provided to be present between the curved part and the toner receiving port of the inserted conveyance tube. |
