| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball supply device by which a ball is not scattered by adopting a gravity drop system, there is no risk of squashing a ball by an opening and closing unit and further a change in the amount of ball supply can be flexibly responded. SOLUTION: The present invention adopts the following means in a ball supply device to solve problems. First, a lower portion inside a ball reserve unit is made narrow and a ball supply port is provided. Secondly, an opening and closing unit, which can be opened and closed, is provided at the ball support port. Thirdly, a negative pressure source is connected to the ball reserve unit.
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