A case can include a front cover and a back cover. The leading ends of the bags on an adjustment conveyor are abutted by a bumper to reorient the bags 90\xb0 on the adjustment conveyor. The CCU is configured to include a resistance value-voltage value conversion section, an analog-digital conversion section, voltage value-temperature table conversion section, a control voltage calculation section, an digital-analog conversion section, a voltage amplification section, a switch control section, and a switch.