To miniaturize a facility and to save energy by providing a pallet drainage rotary means at the upper portion of a pallet-stopping position of a carrier conveyor and providing an air-blowing means at the rotary shaft.

A pallet drainage rotary means and a pallet supply means are provided with an air-blowing means 60 for blowing air to an area near the rotary center of a pallet 2. In this case, in the air-blowing means 60, a pallet draining rotary means 26 is provided as an air passage 65, a compression air supply pipe 62 is connected to the upper end part via an air rotary joint 61, a solenoid valve 63 that is provided at the compression air supply pipe 62 is turned on or off, and compression air from a supply source can be supplied to the air passage 65, thus achieving drying quickly and enabling a facility to save energy.