NOZZLE DEVICE

A nozzle device includes a main body that is formed of a main-body first member and a main-body second member and that has an internal accommodation space in which members are accommodated, a movable nozzle portion that is accommodated in the accommodation space and a coil spring that is disposed between the movable nozzle portion and the main body When air is supplied to a main-body flow-path portion from below, the flow path of the air is changed by the Coanda effect in an air guiding portion such that the air flows along the air guiding portion and the air flows into a gap between an air receiving portion and the air guiding portion and is guided to the air receiving portion The air is pressurized in the air receiving portion and pushes up the movable nozzle portion