Inorganic fire-resisting rolling shutter which can be large span lifted

Abstract

The large span fireproof roller shutter is suitable for large span frame and for partitioning fireproof areas. It includes rolling shaft and curtain, and the curtain includes curtain fabric and longitudinally arranged raising strips. On the curtain fabric, there are position limiter to fix the raising strips and horizontal pressing strips. Each of the raising strips has one end fixed to the bottom of the curtain fabric for folding and moving the fabric and the other end fixed onto the rolling shaft support by one or several bearings in the middle part. Owing to the support in the middle part, the roller shutter may have large span and greatly lowered rolling resistance being favorable to manual operation.

Description

technical field [0001] The invention relates to a fire-proof rolling door, in particular to a large-span lifting inorganic fire-proof rolling door, which is especially suitable for the fire-proof rolling door with a large-span frame or space as a partition of a fire-proof area. Background technique [0002] Existing rolling doors or fire-proof rolling doors are structurally designed to lift or lower the curtain through the rotation of the shaft. There can be no gaps or holes, so that the entire shaft is completely covered by winding on the shaft. Except for the support at both ends of the shaft, the rest of the shaft cannot be supported. Due to the heavy fire door curtain, it is not suitable for large-span spaces. Setting the rolling shutter will lead to insufficient load bearing of the shaft; now a solution is to use a thicker shaft, as a result, the use of materials increases, and a high-power motor has to be used, but the thickening of the shaft is limited, which is often...

AI Technical Summary

Problems solved by technology

[0004] The present invention is to provide a large-span lifting inorganic fireproof rolling door to solve the technical problem of setting a large-span rolling door

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