| 摘要 |
PROBLEM TO BE SOLVED: To suppress deformation of a transom and an adverse effect to other members when the transom has expanded/contracted due to an effect of heat.SOLUTION: A mullion 2 has a fixed mullion member 11 and a movable mullion member 12 disposed opposite each other leaving an interval k, the fixed mullion member being fixed on a building frame 5 and connected to a transom 3, and the movable mullion member being connected to the transom 3 and held movably in a longer-side direction of the transom 3. A support angle 30 is provided on the movable mullion member 12, the support angle covering the movable mullion member 12 and the fixed mullion member 11 on an indoor side. A T-shaped part 13 having a roughly T-shaped cross-section is provided on an outdoor side of the fixed mullion member 11, and a movable base part 17 of the movable mullion member 12 is disposed on the indoor side of a tip surface 13a of the T-shaped part 13. A fixed joint sleeve 27 having a roughly L-shaped cross-section is fixed on a fixed mullion frame part 14, and a movable joint sleeve 28 having a roughly L-shaped cross-section and fixed on a movable mullion frame part 18 is engaged with the fixed joint sleeve 27, thus restricting a movement range of the movable mullion part 12.SELECTED DRAWING: Figure 3 |
