| 摘要 |
PURPOSE:To make it possible to connecting relatively in a simple manner a rear plate which is given enamel coating to a ceiling plate, side plates and bottom plate by overlapping a rear plate on the flange sections of a ceiling plate, side plates and a bottom plate and at the same time overlapping a receiving plate on to the section of the rear plate which is opposite to said flange sections and making the rear plate and receiving plate contact each other by pushing the flange section or the section opposite to through-holes to the other plate and connecting the contact parts with spot welding, etc. CONSTITUTION:In a cavity 3 a stainless steel plate is bent to form a ceiling plate 10, side plates 11 and 11, and bottom plate 12. At the rear end sections of those plates flange sections 10', 11' and 11' and 12' are formed by bending them so as to project to outside approximately at right angles, and at the flange sections a side plate 13 is connected. The rear plate 13 is given enamel coating and located opposite to the flange sections 10', 11' and 11', and 12' and has round through-holes 14, 14,... pierced with a specified distance among them. On the rear face of the rear plate 13 a receiving plate 15 which is made of a stainless steel plate is overlapped opposite to respective flange section, and in the receiving plate 15 through- holes 16, 16,... are also pierced opposite to respective through-holes in the receiving plate 15, and burring sections 17, 17,... are provided to have the rear plate 13 fixedly between the flange sections and receiving plate 15.
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