| 摘要 |
PROBLEM TO BE SOLVED: To facilitate a removing work of a casing member during maintenance. SOLUTION: An upper bent part 17 is formed at an upper end of a front plate 2, and a top plate inserting part 23 superposed from a lower side of the part 17 is formed at a front end of a top plate 4. A front end side is cut out at an upper inserting part 33 of a right side plate 3 superposed from an inside on a top plate bent part 22 of the plate 4 side. A rear side of the plate 4 is raised, inclined and drawn rearward so that the part 23 is formed capable of being drawn from a lower side of the part 17 of the plate 2. Thus, the plates 2, 4 can be individually removed. To maintain it, inspecting positions can be released only by removing the plate 2 or 4 in response to the inspecting position, and hence the work is facilitated. |
