Transport device and image-formation device

An image-formation device comprising:

• an image-formation part that forms an image on a recording medium;
• and
• a transport device
• wherein the transport device including:
• a driving gear rotatable about a fixed first axis;
• an intermediate gear rotatable about a second axis, the second axis being arranged so that the second axis can be displaced around the first axis, the intermediate gear including a first gear part and a second gear part, the first gear part meshing with said driving gear, the second gear part integrally rotating with said first gear part;
• a driven gear rotatable about a fixed third axis, the driven gear receiving a driving force from said intermediate gear by meshing with the second gear part;
• a roller that receives the driving force transmitted via said driving gear, said intermediate gear and said driven gear, the roller rotating in order to transfer the recording medium, and
• a frame including a first groove and a second groove, the first groove supporting the second axis on a first side of said intermediate gear, the first side being where the first gear part is formed, the second groove supporting the second axis on a second side of said intermediate gear, the second side being where the second gear part is formed,
• wherein the first groove includes a first receiving surface that receives the load that acts on said second axis, the first receiving surface being extended so that said first receiving surface approximately follows the direction of rotation of said driving gear so that the distance between the first axis of said driving gear and the first receiving surface remains approximately constant;
• and
• the second groove includes a second receiving surface that receives the load that acts on said second axis, on the side of said driven gear with respect to said second receiving surface, the second receiving surface extending in the direction of rotation of said driving gear so that the farther the second receiving surface is away from said driven gear the distance between the first axis of said driving gear and the second receiving surface increases.