| 摘要 |
PURPOSE:To suck the air from a side and to simply mount a front cover at a flange. CONSTITUTION:A front cover 12 can be rotated in the state that a hook receiver 36 of the cover 12 is engaged with a hook 24 of a flange 11b. Protrusions 22 formed on a rear surface side of the cover 12 are engaged with engaging recesses 23a of a plurality of poles 23 at a front surface side of the flange 11b by the rotation of the cover 12. A threaded inserting part 35 of the cover 12 is matched to a threaded mounting part 25 of the flange 11b in the engaged state (positioned state), and both can be fixed by a front cover mounting screw 29. |
