| 摘要 |
PROBLEM TO BE SOLVED: To properly constitute a lightweight and simple panel body having a hollow part inside, using a face plate comprising a sheet-metal material and the like.SOLUTION: In constituting a box-shaped panel body having a hollow part inside by combining an exterior plate 3 and an interior plate 4 having a pair of faceplates 34 and 44 in the plate thickness direction, a tongue piece 60 is provided on the faceplate 34 of the exterior plate 3, and a slit 50 is provided at a position corresponding to the tongue piece 60 of the face plate 44 of the interior plate 4. By combining both faceplates 34 and 44, a separation control part Y for controlling a behavior of expanding the distance between the faceplates 34 and 44 in the plate thickness direction, is formed between the tongue piece 60 and the slit 50 in the hollow part. |
