INCORPORATION BY REFERENCE

This application is based on and claims the benefit of priority from Japanese Patent application No. 2019-165569 filed on Sep. 11, 2019, which is incorporated by reference in its entirety.

TECHNICAL FIELD

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

BACKGROUND

In an image forming apparatus, such as a printer, a conveyance path for a sheet is formed by conveyance members, such as various conveyance rollers and conveyance belts. During the conveyance of the sheet by the conveyance members, if sheet powder adheres on the conveyance face of the conveyance member, a conveyance failure may occur. Thereby, the image forming apparatus is known, in which a cleaning device to remove the sheet powder from a surface of a pair of resist rollers as the conveyance member is provided. The cleaning device cleans the conveyance member by bringing a web sequentially delivered from a belt shaped web roll into pressure-contact with the conveyance surface of the conveyance member.

The cleaning device includes a delivery roller supporting the web roll, a pressure roller bringing the web delivered from the web roll into pressure-contact with the conveyance member and a winding roller which winds the web passed the conveyance member into a roll. The delivery roller delivers the web from the web roll, the pressure roller brings the unused portion of the web into pressure-contact with the conveyance face of the conveyance member, and the winding roller collects the used portion of the web. By delivering the unused portion of the web to the conveyance member continuously, a cleaning performance of the cleaning device is kept constant.

SUMMARY OF THE INVENTION

In accordance with one aspect of the present disclosure, a cleaning device cleans a conveyance face of a conveyance member conveying a sheet. The cleaning device includes a delivery roller, a pressure roller, a fixed roller and a winding roller. The delivery roller supports a web roll that a belt shaped web is wound into a roll. The pressure roller brings the web delivered from the web roll into pressure-contact with the conveyance face. The fixed roller keeps an extending angle of the web passed from between the conveyance member and the pressure roller constant. The winding roller winds the used web passed the fixed roller into a roll.

In accordance with one aspect of the present disclosure, an image forming apparatus includes an image forming part forming an image on the sheet; and the cleaning device.

The above and other objects, features, and advantages of the present disclosure will become more apparent from the following description when taken in conjunction with the accompanying drawings in which a preferred embodiment of the present disclosure is shown by way of illustrative example.

