| 摘要 |
PURPOSE:To make possible maintenance without removing a top heater portion so as to improve serviceability, and reduce cost by fixing a fixing brim to a top heater case, and arrange a frame over the top face of a top board. CONSTITUTION:A fixing brim 11 is formed in the vicinity of a back portion edge 10, and the brim 11 is fixed to a top heater case 13 with vises. The front portion of a frame 7 is engaged with the engaging pieces 14 of the case 13 via an engaging portion 15, and the back portion thereof is fixed to a case 13 with the vises via the brim 11. A top plate 1 and a fixing portion, to which the frame 7 and a metal fitting 21 are to be fitted, are arranged at an upper position over the top face of a top board 18. Thereby, if only the vises, fixing the brim 11 to the case 13, are removed, the plate 1 can be removed, and accordingly a top heater portion is easily served, and the size of the plate 1 can be secured so that workability can be increased. Further, a frame wall portion 4 and a fixing portion 6 are spot welded mutually so that cost can be reduced. |
