DISCHARGING HATCH

PROBLEM TO BE SOLVED: To provide a discharging hatch which can easily be disassembled and cleaned. SOLUTION: This discharging hatch 16 is equipped with a truncated conical discharging hatch external wall 21 which has a discharging port on the top section, and a flow plate 22 having air permeability which is arranged to have a specified gap to the external wall, and is equipped with an opening corresponding to the discharging port. The discharging hatch 16 discharges a powdery object remaining in a vicinity of the flow plate by fluidizing the remaining powdery object in such a manner that air which is fed into the gap between the external wall and the flow plate is made to jet out through the flow plate. In the discharging hatch 16, the external wall has a contact surface on the peripheral edge section of the discharging port of the internal wall. The flow plate is equipped with a contact section, a small flange section, a large flange section, a plurality of vertical ribs, and a plurality of concentric ribs which cross the vertical ribs. In this case, the contact section is installed on the peripheral edge section on the external side of the opening. The small flange section is formed on the peripheral edge section of the opening. The large flange section is formed on the opening end section on the opposite side from the opening. The plurality of vertical ribs are arranged with specified intervals on the truncated conical external wall of the flow plate which connects both flange sections. The discharging hatch has a structure that the contact section of the flow plate is brought into contact with the contact surface of the external wall through an O ring, and the external wall and the flow plate are combined with a plurality of traction bolts. COPYRIGHT: (C)2008,JPO&INPIT