| 摘要 |
PURPOSE:To make a junction between a thin bottom plate and a circumferential side wall so as not to cause any bending moment there, by supporting a thick bottom plate with a hinge structure. CONSTITUTION:The peripheral edge of a thick bottom plate 4 is mounted on the top of an inner flange part 1a via a shoe 6. With this shoe 6 as a fulcrum, this thick bottom plate 4 is set down to a substantial hinge structure and supported. With this constitution, load merely causes bending moment to the thick bottom plate 4, causing no bending moment to a junction between a thin bottom plate 3 and a peripheral wall 1. Therefore, such a fear that harmful displacement might be entailed to an inner vessel 2 being held by the thin bottom plate 3 is brought to nothing. |
