Image forming apparatus

An image forming apparatus, comprising:

• a rotary member;
• a web in contact with the rotary member to remove toner on the rotary member;
• a display portion indicating a usage of the web;
• a moving unit replaceably supporting the web and configured to wind up the web to move a contact position of the web with the rotary member, the moving unit winding up the web every time when toner images are formed on a unit number of recording materials, if the toner images are formed on the recording materials each having the recording materials of a predetermined size;
• a detecting unit configured to detect that the web has been wound up to a predetermined position;
• and
• a control portion configured to indicate a usage of the web in the display portion,
• wherein the control portion indicates a first usage obtained by a number of times by which the web is wound by driving the moving unit and a unit wind-up amount of the web per one winding operation set in advance, until the predetermined position is detected, and
• wherein the control portion indicates a second usage obtained by a number of times by which the web has been wound and an actual moving amount per one winding operation after the predetermined position is detected, the actual moving amount per one winding operation being defined as an average wind-up amount per unit number of sheets by which the moving unit has wound up the web to the predetermined position.

An image forming apparatus, comprising:

• a rotary member;
• a web in contact with the rotary member to remove toner on the rotary member;
• a moving unit replaceably supporting the web and configured to wind up the web to move a contact position of the web with the rotary member, the moving unit winding up the web every time when toner images are formed on a unit number of recording materials, if the toner images are formed on the recording materials each having a predetermined size;
• a detecting unit configured to detect that the web has been wound up to a predetermined position;
• and
• a control portion configured to inform a replacement of the web if an actual moving amount per one wind-up amount defined as an average wind-up amount per unit number of sheets by which the moving unit has wound up the web to the predetermined position is not within a wind-up range of the web per one winding operation set in advance.

An image forming apparatus, comprising:

• a rotary member;
• a web in contact with the rotary member to remove toner on the rotary member;
• a moving unit replaceably supporting the web and configured to wind up the web to move a contact position of the web with the rotary member;
• a detecting unit configured to detect that the web has been wound up to a predetermined position;
• a control portion to which a unit wind-up amount of the web per unit rotation amount of the rotary member is set and which is configured to move the web by the moving unit corresponding to a rotation amount of the rotary member;
• and
• a storage portion configured to store the rotation amount of the rotary member,
• wherein in response to a detection of the predetermined position by the detecting unit, the control portion obtains an actual moving amount of the web per unit rotation amount from a rotation amount, stored in the storage portion, of the rotary member until the predetermined position is detected and a length of the web to the predetermined position, and informs a replacement of the web based on the actual moving amount and a remaining length of the web.