| 摘要 |
PROBLEM TO BE SOLVED: To provide a powder and grain screw conveyor with an automatic air washer capable of automatically air washing the powder and grain attached to an inner wall face of a casing without applying the manual operation at all during the conveying operation of the powder and grain. SOLUTION: Bearings 2a and 2b are mounted on left and right both ends of a main body casing 1, a rotary shaft 4 with a left hand blade 3 continuously spirally projected in an outer radial direction, is pivoted by the bearings, a geared motor 6 is connected to the outside of the bearing 2b, a rotary shaft 4 is rotated to spirally send the left hand blade 3 in the left direction, the rotary shaft 4 has a hollow pipe structure, shafts 7a and 7b bearings are inserted into both ends of the rotary shaft 4, tip parts of the shafts 7a and 7b are rotatably held by the bearings 2a and 2b at left and right both ends of the main body casing 1, plural short slits 8 penetrating to the inside of the rotary shaft 4 are formed on an outside cylindrical face of the rotary shaft 4 of the left hand blade 3, and the shaft 7b for the bearing has a through hole K at its central part to be connected with a rotary one-touch union joint 9 mounted on the rotary shaft 4.
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