| 摘要 |
PROBLEM TO BE SOLVED: To present an improved view to a batter standing in a batter's box, not to obstruct ball collection and to prevent the irregular rebound of a hit ball. SOLUTION: This arrangement structure of a projector 9 for performing projection at a screen part S provided in front of a pitching device P is provided with an upper stage ball gathering floor surface 4 lowered and inclined from the side of the batter box A to the side of the screen part S, a lower stage ball gathering floor part 6 connected through a step part 5 to the upper stage ball gathering floor surface 4, a projector burying space 2 formed at a part of the step part 5 and a ceiling part 7 provided on the upper part of the projector burying space 2 for which an upper surface is lowered and inclined with the same inclination as the upper stage ball gathering floor surface 4 or by the gradient steeper than the upper stage ball gathering floor surface 4. Inside the projector burying space 2, the video projection part 9b of the projector 9 is arranged in the state of being turned to the screen part S.
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