Intermediate transfer belt assembly with shutter structure

An image forming device comprising:

• a plurality of photosensitive drums on which toner images are to be formed;
• an intermediate transfer belt onto which the toner images are to be transferred;
• a plurality of intermediate transfer rollers respectively facing the plurality of photosensitive drums with the intermediate transfer belt interposed therebetween;
• a plurality of gap rings respectively coupled to end portions of the plurality of intermediate transfer rollers to be rotated to maintain intervals between the plurality of photosensitive drums and the plurality of intermediate transfer rollers;
• a frame provided with an accommodation portion to accommodate foreign matter and having a plurality of inlets located on lower portions of the plurality of gap rings, wherein the frame is to support the plurality of intermediate transfer rollers to be rotated;
• and
• a shutter to open or close the plurality of inlets,
• wherein the shutter is located in a closed position when an image-forming operation using the intermediate transfer belt is not performed.