Mold container device, and tire vulcanizer

A mold container device comprising:

• a plurality of segments that are disposed side by side in a ring shape about an axis, have an outer surface inclined in a radial direction around the axis in an axial direction in which the axis extends, and have a heat source;
• an outer ring that is formed in a ring shape around the axis, has an inner peripheral surface having an inclined surface slidable with respect to the outer surface of the plurality of segments, and is displaceable in the axial direction;
• and
• a conversion mechanism that connects the outer ring and the segment, moves the segment in the radial direction between a first position in which the segment is closed and a second position outside the first position in the radial direction, according to displacement of the outer ring in the axial direction, and swings one of a lower edge portion and an upper edge portion of the segment in the radial direction around a swinging shaft provided on the other of the lower edge portion and the upper edge portion of the segment disposed in the second position, according to displacement of the outer ring in the axial direction.