| 摘要 |
A shutter comprising a shutter panel and a pair of guide rails including curved portions and holding both end portions of the shutter panel slidably. Each of the guide rails includes straight members comprised of parallel tie plates and interval plate connecting central portions thereof mutually to have a H-shaped section and corner members comprising curved plates succeeding to said tie plates. The both end portions of the shutter panel are inserted slidably between inner half portions of the tie plates partitioned by the interval plates, and outer half portions of the tie plates are mounted to a fixing portions to thereby enable smooth sliding movement of the shutter panel within the guide rails.
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