Fibrous body processing apparatus

A fibrous body processing apparatus, comprising:

• a coarsely-crushed-pieces reservoir unit that stores coarsely crushed pieces made of a material that contains fibers;
• a humidifying unit that generates humidified air and supplies the humidified air to the coarsely-crushed-pieces reservoir unit;
• a weight measurement unit that measures a weight of the coarsely crushed pieces let out of the coarsely-crushed-pieces reservoir unit;
• a fixed amount supplying unit that supplies a fixed amount of the coarsely crushed pieces measured by the weight measurement unit;
• a defibrating unit that defibrates the coarsely crushed pieces supplied from the fixed amount supplying unit;
• a first transportation portion through which the coarsely crushed pieces are sent from the coarsely-crushed-pieces reservoir unit to the weight measurement unit;
• a second transportation portion through which the coarsely crushed pieces are sent from the fixed amount supplying unit to the defibrating unit;
• and
• a humidified air supplying passage which includes an upstream-side end portion and a downstream-side end portion and through which humidified air generated at the humidifying unit is supplied to the defibrating unit while bypassing the weight measurement unit.