A yarn winding equipment comprising: a plurality of winding units each of which being configured to unwind a yarn from a pre-supply bobbin (Bs) and to wind the yarn on a winding bobbin (Bw); a tray transport device including a plurality of individual paths each capable of discharging from a corresponding one of the winding units a tray on which the pre-supply bobbin (Bs) has been mounted; and a first discharge path configured to merge with the individual paths; a bobbin processing device including a second discharge path connected to a downstream end of the first discharge path in a transport direction in which the trays are transported and capable of processing a discharged bobbin (Bd) that is the pre-supply bobbin (Bs) that is discharged from the winding unit; and a control section, wherein the tray transport device includes a first conveyor mechanism configured to transport the tray along the first discharge path; and a first drive source configured to drive the first conveyor mechanism, the bobbin processing device includes a second conveyor mechanism configured to transport the tray along the second discharge path; and a second drive source configured to drive the second conveyor mechanism, the yarn winding equipment further includes a tray detecting section configured to detect the trays that are being transported along the second discharge path; characterized in that the yarn winding equipment further includes a determining section configured to determine whether the tray stays on the second discharge path based on a detection result obtained in the tray detecting section, and the control section is configured to, when the determining section determines that the tray has stayed on the second discharge path, stop operation of the first conveyor mechanism in a state that the second conveyor mechanism is operating. a plurality of winding units each of which being configured to unwind a yarn from a pre-supply bobbin (Bs) and to wind the yarn on a winding bobbin (Bw); a tray transport device including a plurality of individual paths each capable of discharging from a corresponding one of the winding units a tray on which the pre-supply bobbin (Bs) has been mounted; and a first discharge path configured to merge with the individual paths; a plurality of individual paths each capable of discharging from a corresponding one of the winding units a tray on which the pre-supply bobbin (Bs) has been mounted; and a first discharge path configured to merge with the individual paths; a bobbin processing device including a second discharge path connected to a downstream end of the first discharge path in a transport direction in which the trays are transported and capable of processing a discharged bobbin (Bd) that is the pre-supply bobbin (Bs) that is discharged from the winding unit; and a control section, wherein the tray transport device includes a first conveyor mechanism configured to transport the tray along the first discharge path; and a first drive source configured to drive the first conveyor mechanism, a first conveyor mechanism configured to transport the tray along the first discharge path; and a first drive source configured to drive the first conveyor mechanism, the bobbin processing device includes a second conveyor mechanism configured to transport the tray along the second discharge path; and a second drive source configured to drive the second conveyor mechanism, a second conveyor mechanism configured to transport the tray along the second discharge path; and a second drive source configured to drive the second conveyor mechanism, the yarn winding equipment further includes a tray detecting section configured to detect the trays that are being transported along the second discharge path; characterized in that the yarn winding equipment further includes a determining section configured to determine whether the tray stays on the second discharge path based on a detection result obtained in the tray detecting section, and a tray detecting section configured to detect the trays that are being transported along the second discharge path; characterized in that the yarn winding equipment further includes a determining section configured to determine whether the tray stays on the second discharge path based on a detection result obtained in the tray detecting section, and the control section is configured to, when the determining section determines that the tray has stayed on the second discharge path, stop operation of the first conveyor mechanism in a state that the second conveyor mechanism is operating.