| 摘要 |
PROBLEM TO BE SOLVED: To provide a safe crossing floor having no possibility of being inverted by locating a supporting frame for fixation or fixing floor above the upper limit of a design value for up-down motion of a seismic isolation floor, one end of a crossing board is linked to a supporting frame or fixed frame, and by placing the other end on the seismic isolation floor and by sliding it. SOLUTION: A crossing board 10 is linked by its linking means i3 and follows up its fluttering while sliding supported by the floor surface of the seismic isolation floor 30. The crossing floor is constituted by a set of numerous boards 10 the side of seismic floor side of the crossing floor 1 is sloped down ward to the front, the height of its upper end portion of the seismic isolation floor of the crossing floor 1 is positioned above the upper limit of the design value of the up-down motion of the seismic isolation floor 30. Then, the crossing floor 1 is linked to linking means 13 of freely ratable in up-down direction to a supporting frame 15 or fixed floor 20 at its upper end portion side. Also at its lower end portion side, it is placed in a freely sliceable manner on the seismic isolation floor 30. As a result, its seismic isolation floor moves to the side of supporting frame 15 and moves to the highest position and the crossing floor 1 is not jumped up even though it moves to the highest position.
|
