Patent ID: 7389807
Filing Date: 2008-06-24
Classification: E06B

Abstract:
1. A sheet shutter device comprising: fitting pieces that are provided at both a right-and-left side portions of a sheet-shaped shutter curtain so as to be spaced from one another at a predetermined distance in a vertical direction and made to run while engagedly fitted in right-and-left rail grooves of guide rails provided at both right-and-left side portions of an opening portion, thereby opening/closing the opening portion, wherein the rail grooves are designed so that the fitting pieces detach from the rail grooves under an excessive load imposed on the shutter curtain; a posture holding bar that is provided horizontally to at least the lower end portion of the shutter curtain, such that a width of the posture holding bar is shorter than a width of the shutter curtain, so that the shutter curtain extends laterally between the fitting pieces and end portions of the posture holding bar, wherein shutter curtain portions that are fitted in the rail grooves of the guide rails are set to be right-and-left edge portions of the shutter curtain to which the posture holding bar does not extend; a first guide body that is provided at a upper side of each of the right-and-left rail grooves and are provided for guiding the posture holding bar in a horizontal line between the right-and-left rails grooves; and a second guide body that is provided for guiding the right-and-left edge portions of the shutter curtain, to which the posture holding bar does not extend toward an upper direction in the rail groove, wherein when the fitting pieces detach from the rail grooves, fitting pieces that are positioned below the posture holding bar are guided by the second guide body so as to be moved upward in the rail grooves, based on that the posture holding bar is guided by the first guide body in a horizontal line between the right-and-left rail grooves in the process of opening/closing operation of the shutter curtain.