MEDIUM LOADING DEVICE AND IMAGE FORMING SYSTEM

To provide a medium loading device capable of suppressing buckling of a medium even when slidability of the medium deteriorates below a level assumed from a recording density, and suppressing deterioration of productivity when the slidability of the medium does not deteriorate to such a degree as to be assumed from the recording density.SOLUTION: A medium loading device 11 comprises: a side end aligning member which is located at a standby position WP when a medium is discharged and aligns the side end of the medium; and a control unit. The control unit specifies a first position WP1 which overlaps with a medium M1 to be discharged this time in a width direction X as the standby position WP when a value based on the first information relating to a recording density of at least one medium of the medium M1 to be discharged this time and a medium discharged last time is equal to or larger than a threshold value, and specifies a second position WP2 which does not overlap with the medium M1 to be discharged this time in the width direction X as the standby position WP when the value based on the first information is less than the threshold value. The control unit adjusts the threshold value based on second information relating to at least one medium of the media recorded until the discharge of this time.SELECTED DRAWING: Figure 4 【課題】記録濃度からの想定よりも媒体の摺動性が低下しているときにおいても媒体の座屈を抑制でき、記録濃度からの想定ほど媒体の摺動性が低下していないときに生産性が低下することを抑制できる媒体積載装置を提供する。【解決手段】媒体積載装置１１は、媒体が排出される際は待機位置ＷＰに位置し、その後に媒体の側端を整合する側端整合部材と、制御部と、を備える。制御部は、今回排出される媒体Ｍ１及び前回排出された媒体のうち少なくとも一方の媒体の記録濃度に係る第１情報に基づく値が閾値以上の場合は、幅方向Ｘにおいて今回排出される媒体Ｍ１と重なる第１位置ＷＰ１を待機位置ＷＰに特定し、第１情報に基づく値が閾値未満の場合は、幅方向Ｘにおいて今回排出される媒体Ｍ１と重ならない第２位置ＷＰ２を待機位置ＷＰに特定し、制御部は、今回の排出までに記録された媒体のうち少なくとも１つの媒体に係る第２情報に基づいて、閾値を調整する。【選択図】図４