| 摘要 |
PROBLEM TO BE SOLVED: To provide a belt-operated spray machine which is improved in adhesive efficiency by controlling forward/backward rotation of a motor so as to achieve optimum efficiency depending on the inclination of an ejection head. SOLUTION: The belt-operated spray machine is formed of the ejection head 1, a main pulley 2 rotatably borne by the ejection head 1, a plurality of auxiliary pulleys 3 rotatably arranged around the main pulley, a belt 4 wrap-connected to the main pulley 2 and the auxiliary pulleys 3 in a manner forming the letterΩ, so as to rotate the main pulley 2 upon driving of a motor 16, and an ejection guide 5 having a tapered tip and arranged on an upper central portion of the ejection head 1 with its base-side end located on the periphery of the main pulley 2. Then openings defined by the ejection guide 5 and the right and left auxiliary pulleys 3 function as a pair of ejection ports D, and concrete is ejected from one of the ejection ports D depending on a rotating direction of the motor 16. Then the motor 16 is driven forward/backward such that the belt 4 travels counterclockwise when the ejection guide 5 sets the ejection head 1 at an angle that is inclined counterclockwise from 90°, and that the belt 4 travels clockwise when the ejection guide 5 sets the ejection head 1 at an angle that is inclined clockwise from 90°. COPYRIGHT: (C)2004,JPO
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