Image forming system and image forming apparatus

An image forming system comprising:

• a first image forming apparatus comprising a first housing and a first fixing unit installable into and removable from the first housing;
• and
• a second image forming apparatus comprising a second housing and a second fixing unit installable into and removable from the second housing, wherein
• the first housing comprises:
• a first guide configured to guide the first fixing unit in a predetermined direction and to guide the second fixing unit in the predetermined direction;
• and
• a first housing contact portion,
• the second housing comprises:
• a second guide configured to guide the first fixing unit in the predetermined direction and to guide the second fixing unit in the predetermined direction;
• and
• a second housing contact portion, wherein
• the first fixing unit comprises a first unit contact portion that interferes with installation of the first fixing unit into the second housing, the first unit contact portion being configured to contact the second housing contact portion during the process in which the first fixing unit is guided by the second guide,
• the second fixing unit comprises a second unit contact portion that interferes with installation of the second fixing unit into the first housing, the second unit contact portion being configured to contact the first housing contact portion during the process in which the second fixing unit is guided by the first guide,
• the first unit contact portion is positioned at a position different from a position of the first housing contact portion in a longitudinal direction of the first fixing unit in a state where the first fixing unit is installed in the first housing, and
• the second unit contact portion is positioned at a position different from a position of the second housing contact portion in a longitudinal direction of the second fixing unit in a state where the second fixing unit is installed in the second housing.

An image forming system comprising:

• a first image forming apparatus comprising a first housing and a first fixing unit installable into and removable from the first housing;
• and
• a second image forming apparatus comprising a second housing and a second fixing unit installable into and removable from the second housing, wherein
• the first housing comprises:
• a first guide configured to guide the first fixing unit in a predetermined direction and to guide the second fixing unit in the predetermined direction;
• and
• a first housing contact portion,
• the second housing comprises:
• a second guide configured to guide the first fixing unit in the predetermined direction and to guide the second fixing unit in the predetermined direction;
• and
• a second housing contact portion, wherein
• the first fixing unit comprises a first unit contact portion that interferes with installation of the first fixing unit into the second housing, the first unit contact portion being configured to contact the second housing contact portion during the process in which the first fixing unit is guided by the second guide,
• the second fixing unit comprises a second unit contact portion that interferes with installation of the second fixing unit into the first housing, the second unit contact portion being configured to contact the first housing contact portion during the process in which the second fixing unit is guided by the first guide,
• a plurality of the first housing contact portions is provided on a first member elongated in a longitudinal direction of the first fixing unit,
• a plurality of the second housing contact portions is provided on a second member elongated in a longitudinal direction of the second fixing unit,
• the first fixing unit comprises a plurality of the first unit contact portions, each of the first unit contact portions being positioned at a position corresponding to each of the second housing contact portions, and
• the second fixing unit comprises a plurality of the second unit contact portions, each of the second unit contact portions being positioned at a position corresponding to each of the first housing contact portions.