Auxiliary member

An auxiliary member configured to be mounted to a platen, the platen being configured to be conveyed between a set position and a print position, the set position being a position where a print surface of a print medium is placed on a placement surface that is an upper surface of the platen, the print position being a position where the placement surface of the platen faces, in an up-down direction, a nozzle surface of an inkjet head, with the print surface of the print medium between the placement head of the platen and the nozzle surface of the inkjet head, the auxiliary member comprising:

• a sheet extending in a plane intersecting a first direction;
• a first support member extending in a second direction intersecting the first direction, the first support member being disposed at an end of the sheet in a third specific direction, the third specific direction being one of a third direction intersecting the first direction and the second direction, the first support member supporting the sheet and having a higher rigidity than the sheet;
• a second support member extending in the second direction, the second support member being disposed at an end of the sheet in a third opposite direction, the third opposite direction being opposite to the third specific direction in the third direction, the third support member supporting the sheet and having a higher rigidity than the sheet;
• and
• a third support member extending toward a single point in the third direction from both the first support member and the second support member, the single point being disposed between the first support member and the second support member, the third support member supporting the sheet and having a higher rigidity than the sheet, wherein
• the auxiliary member is configured to be mounted to the platen with the first direction oriented along the up-down direction,
• the sheet is disposed between the placement surface of the platen and the print surface of the print medium in the up-down direction, in a state where the auxiliary member is mounted to the platen, and
• the first support member, the second support member, and the third support member are positioned below the sheet, in the state where the auxiliary member is mounted to the platen.