CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on and claims priority under 35 USC 119 from Japanese Patent Application No. 2020-136477 filed Aug. 12, 2020.

BACKGROUND

(i) Technical Field

The present disclosure relates to a transfer device and an image forming apparatus.

(ii) Related Art

JP-A-58-005769 discloses a transfer device. The transfer device includes a transferred material transporting unit, a gripper piece, and a switch member. The gripper piece is attached to the transporting unit. The gripper piece is pivotally supported by a rotating shaft. The gripper piece rotates relative to a base member. The gripper piece holds a leading end side of the transferred material. The switch member is attached to a base member side. In order to detect whether the transferred material is in the gripper, a part of a switch member position in the gripper piece is cut out.

SUMMARY

Aspects of non-limiting embodiments of the present disclosure relate to providing a transfer device including: an annular transfer belt including an outer surface, a toner image being transferred to the outer surface of the annular transfer belt; a transfer unit including a transfer cylinder; and a facing roller member that is in contact with an inner surface of the transfer belt, in which the transfer cylinder includes a base material, and a surface layer wound around an outer circumference of the base material, the surface layer being replaceable with respect to the base material, the transfer cylinder has a transfer region where the toner image is transferred from the transfer belt to a recording medium in a state where the recording medium is sandwiched between the transfer cylinder and the outer surface of the transfer belt, and the facing roller member faces the transfer cylinder in the transfer region, the transfer device that can achieve both a replaceability of the surface layer and an image transferability of the surface layer in the transfer cylinder as compared to a case where the surface layer in the transfer cylinder includes an elastic layer and the surface layer has a surface roughness Rz of more than 25 μm, an Asker C hardness of less than 45° or more than 65°, a volume resistance of less than 6.0 (log Ω) or more than 8.5 (log Ω), or a thickness of more than 10 mm.

Also, aspects of non-limiting embodiments of the present disclosure relate to providing a transfer device including: an annular transfer belt including an outer surface, a toner image being transferred to the outer surface of the annular transfer belt; a transfer unit including a transfer cylinder; and a facing roller member that is in contact with an inner surface of the transfer belt, in which the transfer cylinder includes a base material, and a surface layer wound around an outer circumference of the base material, the surface layer being replaceable with respect to the base material, the transfer cylinder has a transfer region where the toner image is transferred from the transfer belt to a recording medium in a state where the recording medium is sandwiched between the transfer cylinder and the outer surface of the transfer belt, and the facing roller member faces the transfer cylinder in the transfer region, the transfer device that can achieve both a replaceability of the surface layer and an image transferability of the surface layer in the transfer cylinder as compared to a case where the surface layer in the transfer cylinder has a single-layer structure including a foamed conductive elastic layer.

Aspects of certain non-limiting embodiments of the present disclosure address the above advantages and/or other advantages not described above. However, aspects of the non-limiting embodiments are not required to address the advantages described above, and aspects of the non-limiting embodiments of the present disclosure may not address advantages described above.

According to an aspect of the present disclosure, there is provided a transfer device including: an annular transfer belt including an outer surface, a toner image being transferred to the outer surface of the annular transfer belt; a transfer unit including a transfer cylinder; and a facing roller member that is in contact with an inner surface of the transfer belt, in which the transfer cylinder includes a base material, and a surface layer wound around an outer circumference of the base material, the surface layer being replaceable with respect to the base material, the transfer cylinder has a transfer region where the toner image is transferred from the transfer belt to a recording medium in a state where the recording medium is sandwiched between the transfer cylinder and the outer surface of the transfer belt, the surface layer includes an elastic layer, the surface layer has a thickness of 6.0 mm or more and 10 mm or less and an Asker C hardness of 45° or more and 65° or less, and the facing roller member faces the transfer cylinder in the transfer region.

