To open a door member when a tray is brought into contact with a contact member so as to prevent a bobbin yarn from being caught in a door and prevent damage of the bobbin yarn and the door member by arranging the contact member to be brought into contact with the tray in the door member.

When doors d1, d2 are closed, a pedestal part t2 whose diameter is smaller than that of a flange part in a tray (t) is brought into contact with lower horizontal rotational plates d9, d11 constituting a contact member with the tray (t) if the tray (t), which is conveyed by means of a driving member P arranged along a guide path h31, approaches a double doors type door member D1. Then, the lower horizontal rotational plates d9, d11 are shifted while rotated retractively around vertical shafts d5, d7 so as to be opened to both sides. In this constitution, contact of a bobbin yarn with the doors d1, d2 is prevented and no damage caused in the bobbin yarn, and as the lengths of the lower horizontal rotational plates d9, d11 supporting the lower end parts of the doors d1, d2 are longer than the widths of the door d1, d3, rotational radii of the lower horizontal rotating plates d9, d11 are large, and the doors d1, d2 can be widely opened further.