Inkjet recording apparatus capable of suppressing an influence of a change in belt speed during image recording

An inkjet recording apparatus, comprising:

• a line head including at least one recording head having a plurality of nozzles for ejecting ink;
• an endless conveyance belt that has a plurality of openings and carries thereon and conveys a recording medium;
• a driving roller that contacts an inner circumferential surface of the conveyance belt at a downstream side of the conveyance belt in a conveyance direction for conveying the recording medium and drives to rotate the conveyance belt;
• one or more stretching rollers that, together with the driving roller, stretch the conveyance belt over themselves;
• and
• a control portion that controls driving of the at least one recording head and the conveyance belt so as to execute flushing in which, at a timing different from a timing contributing to image recording, the ink is ejected through the plurality of nozzles of the at least one recording head to pass through any of the plurality of openings,
• wherein
• the conveyance belt has a plurality of opening groups each composed of a plurality of openings arranged in a width direction of the conveyance belt and in the conveyance direction, each being identical to each of the plurality of openings, and the opening groups are formed in plural locations on the conveyance belt at prescribed spacings in the conveyance direction,
• in a state where any one of the opening groups is in contact with the driving roller, at least one of others of the opening groups is positioned immediately below the line head, and
• the conveyance belt has a plurality of suction holes for sucking the recording medium from inside a loop of the conveyance belt so that the recording medium is held by absorption, and the suction holes are formed separately from the openings.

An inkjet recording apparatus, comprising:

• a line head including at least one recording head having a plurality of nozzles for ejecting ink;
• an endless conveyance belt that has a plurality of openings and carries thereon and conveys a recording medium;
• a driving roller that contacts an inner circumferential surface of the conveyance belt at a downstream side of the conveyance belt in a conveyance direction for conveying the recording medium and drives to rotate the conveyance belt;
• one or more stretching rollers that, together with the driving roller, stretch the conveyance belt over themselves;
• and
• a control portion that controls driving of the at least one recording head and the conveyance belt so as to execute flushing in which, at a timing different from a timing contributing to image recording, the ink is ejected through the plurality of nozzles of the at least one recording head to pass through any of the plurality of openings,
• wherein
• when, among the one or more stretching rollers, rollers disposed at an upstream end and a downstream end, in the conveyance direction, of a placement plane of the conveyance belt opposed to the at least one recording head are each referred to as a conveyance end roller, at least one of a plurality of opening groups is a particular opening group that is in such a positional relationship that, in a state where the particular opening group is in contact with the driving roller, all others of the opening groups are not in contact with the conveyance end roller, and
• the plurality of opening groups are formed not at equal spacings but at irregular spacings in the conveyance direction.