| 摘要 |
PROBLEM TO BE SOLVED: To provide a metallic door in which a large warp in a thickness direction can be suppressed even when there is a temperature difference between both sides of the door in the thickness direction.SOLUTION: A metallic door of the present invention is constituted by including a framework 16 having a quadrangle shape in a front view and whose upper, lower, left and right side parts are formed of four metallic ribs 11-14, and by attaching two metallic surface members 17 on front and rear sides of the framework 16. The two surface members 17 are coupled to the rib that forms at least one side part among the upper, lower, left and right side parts of the framework 16, with coupling parts such as flat head screws 20, 22, 24, 26. The coupling parts each has a length not long enough for the length of one side part or has a point shape whose length is short.SELECTED DRAWING: Figure 2 |
