| 摘要 |
PROBLEM TO BE SOLVED: To provide a dirt removing device for facilitating handling of replacement work or the like at low cost by simplifying a structure and reducing the number of members.SOLUTION: The dirt removing device 20 which partially configures a conveyance mechanism 15 for conveying a game ball B to a ball hitting position and removes dirt attached on the game ball B includes a screw 28, a screw housing part 23, and a polishing cloth 32. The screw 28 is constituted of a rod-like rotating body with a spiral groove 28a formed on an outer peripheral surface and allows the conveyance of the game ball B by being rotated in an axial direction as a center, and the screw housing part 23 performs supporting so that the game ball B is along the spiral groove 28a. Then, the polishing cloth 32 is brought into contact with the game ball B to polish the game ball B, and is formed in a disk shape to be rotated according to the movement of the game ball B. |
