Paper sheet takeout device with air supply port directed differently than negative pressure chamber opening

A paper sheet takeout device comprising:

• a supply mechanism to move a plurality of accumulated paper sheets in an accumulation direction to supply the accumulated paper sheets to a takeout position sequentially from one of the paper sheets positioned at an end of the accumulation direction;
• a takeout belt having a plurality of adsorption holes, the takeout belt running along a surface of a paper sheet to the takeout position;
• a negative pressure chamber having an opening, the opening being arranged so as to directly face a surface of the takeout belt opposing an adsorption surface of the takeout belt facing the takeout position, which is opposite to a surface of a paper sheet supplied to the takeout belt;
• a suction unit to suck air existing at the takeout position via the opening and the adsorption holes by evacuating the negative pressure chamber, and to adsorb each of the paper sheets sequentially supplied to the takeout position onto the adsorption surface of the takeout belt by causing a negative pressure to act on each of the paper sheets;
• and
• an air supply tube connected to the negative pressure chamber and the suction unit, wherein
• the negative pressure chamber has an air supply port to supply air into the negative pressure chamber through the air supply tube and to return the negative pressure to atmospheric pressure, the air supply port being arranged so that the air supplied via the air supply port is directed to a position and in a direction different from those of the opening of the negative pressure chamber, and
• the air supply tube is disposed so that a virtually extended portion of an inner wall of the air supply tube is arranged at a position and in a direction where the virtually extended portion does not substantially intersect the opening of the negative pressure chamber, and so that an extended line of a center of the air supply tube is arranged at a position and in a direction where the extended line passes through substantially a center point of the negative pressure chamber.