| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce a risk of falling of a box body while improving workability by attaching an adaptor to a ventilation port of the box body easily.SOLUTION: A ventilation device has a configuration in which an engaging part 12 having a rib 11 on a box body side of the lower part of an adaptor 9 is provided, and an engaging opening is provided at the part facing the rib 11 of the box body. Thereby, the rib 11 of the engaging part 12 is engaged with the engaging opening by inserting the box body from below in the adaptor 9, so that the ventilation device can be acquired in which workability can be improved by easily attaching the adaptor 9 to a ventilation port of the box body, and a risk of falling of the box body can be reduced.</p> |
