Abstract: 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.

Abstract: A flying ball stopping net device having a plurality of legs arranged side by side one ht ground. The legs extend in one direction substantially horizontal with a frame extending upward away from the legs. The frame has supports that support lower portions of the frame body at longitudinally intermediate portions of the legs. A net surrounds the outer edge of the frame body to which it is attached. Each support includes a first support pipe projecting upward from the longitudinal intermediate portion of the leg. A second support pipe projects downwardly from the lower portion of the frame body and is removably fitted to the first support pipe for relative turning movement around the axis thereof. An elastic locking body having one end fitted in one of the first and second support pipes and is locked therein. The other end of the elastic body is removably fitted in the other one of the first and second support pipes to be pressed against the inner peripheral surface thereof.

Abstract: A pitcher protection net device in baseball practice having a frame installed on the ground to vertically extend to cover a pitcher from his front. A net closes a space surrounded by the outer edge of the frame and is attached to the frame. The frame includes a main frame forming one lateral portion on one widthwise side. An auxiliary frame projects from the lower portion of the main frame toward the other widthwise side to form the other lateral portion of the frame. The pitcher protection net device in baseball practice includes an extension net that closes a corner space surrounded by this side edge of the upper portion main frame on the other side and the upper edge of the auxiliary frame. The extension net is capable of deflecting downward. The pitcher protection net device also includes an adjusting means for adjusting the amount of deflection of the upper edge to the extension net.