Sheet conveying roller, sheet conveying apparatus, and image forming apparatus

A sheet conveying roller comprising:

• a shaft supported by bearings at both ends thereof;
• and
• an elastic frictional member provided on an outer circumference of the shaft, wherein the shaft is a pipe shaft, the both ends of the pipe shaft are formed into small-diameter portions, and a mount portion on which the frictional member is mounted is formed into a large-diameter portion having a diameter larger than a diameter of the both ends, wherein
• the sheet conveying roller conveys a sheet in contact with an outer periphery of the frictional member,
• at least one hole in the large-diameter portion extending through the large-diameter portion to form a passage between an inner side of the pipe shaft and an outer side of the pipe shaft,
• at least one projection is formed on an inner surface of the frictional member, and
• the at least one projection formed on the frictional member is insertable into the at least one hole in the large-diameter portion to be engaged with the at least one hole so that the frictional member is locked with the pipe shaft, wherein
• the frictional member is mounted on the large-diameter portion in a C-shaped cross section, while the at least one projection formed on the frictional member is detachably attached to the at least one hole in the large-diameter portion, wherein
• a chevron portion and a valley portion are formed on opposite ends of the C-shaped cross section of the frictional member so that the chevron portion and the valley portion intermesh with each other.