To provide a sheet shutter preventing the flexure of a winding shaft and preventing a fire resistant sheet from being wrinkled and loosened.
Shaft receiving rollers are installed in a plurality of parts of the bottom face of a case 1 enclosing a winding shaft 4, to support the load of the winding shaft 4. The flexure of the winding shaft 4 can therefore be prevented to hold linearity. An auxiliary sheet 15 is further interposed at a contact part between the shaft receiving roller and the winding shaft 4 to prevent the degradation of fire resistant cloth caused by wear, and a fire resistant sheet can be smoothly lowered by the energizing force of a spring equipped at an auxiliary winder 16. The winding shaft 4 is journalled to moving plates 10a, 10b, and the moving plates 10a, 10b are fixed in a vertically movable manner to brackets 3. The diameter change of the winding shaft 4 due to winding can therefore be coped with, while preventing excessive force from being applied to the winding shaft 4.
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KIDO OSAMU
OBA ATSUSHI
SUZUKI SHUTTER MFG