Image forming apparatus and sheet feeding device

An image forming apparatus comprising:

• an image forming part configured to form an image on a sheet;
• a paper dust collecting roller configured to collect paper dust from the sheet conveyed along a conveying path toward the image forming part;
• a conveying roller, which is provided in a position opposed to the paper dust collecting roller, and which is configured to convey the sheet toward the image forming part;
• a paper dust removing member, which is provided upstream in a conveying direction of the sheet from the paper dust collecting roller and the conveying roller in the conveying path, and which is configured to contact the paper dust collecting roller for removing the paper dust collected onto the paper dust collecting roller;
• a supporting member extending in a direction parallel with a rotation axis of the paper dust collecting roller;
• a swing shaft, which is provided in parallel with the rotation axis of the paper dust collecting roller, and which supports the supporting member for allowing the supporting member to swing around the swing shaft;
• and
• a pressing member configured to apply a pressing force to the supporting member so as to rotate the supporting member around the swing shaft in a direction in which the paper dust removing member contacts the paper dust collecting roller,
• wherein the supporting member comprises:
• a guiding surface configured to contact the sheet conveyed along the conveying path for guiding the sheet toward the image forming part along the conveying path;
• a removing member attaching part, on which the paper dust removing member is provided, wherein the removing member attaching part is inclined at an acute angle relative to the guiding surface and extends from an end portion of the guiding surface at a downstream side in the conveying direction of the sheet toward an upstream side in the conveying direction of the sheet so as to face the paper dust collecting roller, the end portion of the guiding surface at the downstream side in the conveying direction being configured to be located on the conveying path;
• and
• a paper dust receiving part, which is provided inside the acute angle formed by the guiding surface and the removing member attaching part and upstream in the conveying direction of the sheet from the paper dust removing member, and which is configured to receive the paper dust removed by the paper dust removing member.