| 摘要 |
The formation of a ball throwing machine is facilitated and the accuracy of the direction in which balls are thrown by the ball throwing machine is improved. The ball throwing machine ( 1 ) comprises a support body ( 4 ) mountable on the ground ( 3 ), a pair of rotary shafts ( 6, 6 ) supported by the support body ( 4 ) so that they are rotatable around their own parallel axes ( 5 ), and a pair of rotary wheels ( 7, 7 ) fixed on the rotary shafts ( 6 ) concentrically with the latter. A ball ( 2 ) fed between the outer peripheral surfaces ( 10, 10 ) of the two rotary wheels ( 7, 7 ) rotating in opposite directions (C, D) is nipped between the outer peripheral surfaces ( 10, 10 ) and accelerated and thrown outward. The support body comprises a support body main body ( 15 ) mountable on the ground ( 3 ), and a support pipe ( 16 ) supported by the support body main body ( 15 ) to linearly extend so as to support the rotary shafts ( 6 ) in a state in which the rotary shafts ( 6 ) extend through the support pipe ( 16 ) in a direction orthogonal to the longitudinal direction of the support pipe ( 16 ).
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