| 摘要 |
PROBLEM TO BE SOLVED: To efficiently collect fiber-form dust and dirt and other dust and dirt. SOLUTION: The inside of a dust collecting box 1 which is attached to the upper section of a polishing machine K, is partitioned by a partition 4 into an air sucking chamber 2 and an air discharging chamber 3. In this case, the polishing machine K side of the air sucking chamber 2 is formed into an opening 5 communicating with the polishing machine main body Ka. Also, a discharging port 6 for pachinko balls P which are polished by the polishing machine main body Ka is formed on the sidewall side. At the discharging port, a shutter 7 comprising a plurality of shielding plates 7a, which can open/close the discharging port is provided rotatably with a supporting shaft 8 as the rotation center. In the air discharging chamber 3, an air discharging port 13 which communicates with an air sucking means is provided. On the partition 4, a first ventilation hole 10 which connects the air sucking chamber 2 with the air discharging chamber 3, and a second ventilation hole 11 which is arranged in the vicinity of the discharging port for pachinko balls are respectively formed.
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