Printing apparatus including a plurality of print heads for ejecting ink and a maintenance unit for performing maintenance on the print heads

A printing apparatus comprising:

• a plurality of print heads configured to eject liquid;
• a maintenance unit configured to perform maintenance on the plurality of printheads;
• detachable units provided in correspondence to the plurality of printheads and each including a negative pressure tank used for suction by the maintenance unit and a pump for generating negative pressure;
• a negative pressure application unit, included in the maintenance unit, communicating with the pump of a corresponding one of the detachable units and configured to perform suction cleaning while facing a nozzle formation surface of a corresponding one of the printheads;
• a second pump, included in each of the detachable units, configured to supply the maintenance unit with cleaning liquid used for the suction cleaning;
• a second storage tank configured to store the cleaning liquid to be supplied to the maintenance unit;
• and
• second tubes communicating with the second storage tank and connected to the detachable units,
• wherein, in a case when a direction in which the detachable units are detached from a main body of the printing apparatus is a front side, joints for connecting the second tubes to the detachable units are provided at locations except for the front side.

A printing apparatus comprising:

• a plurality of print heads configured to eject liquid;
• a maintenance unit configured to perform maintenance on the plurality of printheads;
• and
• detachable units provided in correspondence to the plurality of printheads and each including a negative pressure tank used for suction by the maintenance unit and a pump for generating negative pressure,
• wherein the maintenance unit has a cap support member configured to support a plurality of capping mechanisms configured to protect nozzle formation surfaces of the plurality of printheads, the cap support member including:
• a plurality of supply flow channels configured to supply liquid from a second storage tank respectively to the plurality of capping mechanisms using a third pump, the second storage tank configured to store cleaning liquid;
• three-way valves provided between the supply flow channels and the capping mechanisms and configured to switch between supplying the liquid to the capping mechanisms and allowing the capping mechanisms to communicate with an atmosphere;
• and
• a valve support member configured to support the plurality of three-way valves provided in correspondence to the capping mechanisms, and
• wherein the valve support member is disposed at one end of the cap support member.