Patent ID: 9670715
Date: 2017-06-06
CPC Classifications: E05D,E05Y,E06B

Claim:
1. A fire door comprising: a plate-shaped door body movable from an open position at which an opening is open to a closed position at which the opening is closed by the door body; a guide member for guiding movement of the door body; wherein the door body is disposed in an attitude in which the door body extends along a vertical direction of the opening and along a lateral direction of the opening, the door body being movable along the lateral direction from the open position to the closed position, wherein, with a direction perpendicular to the lateral direction as seen along the vertical direction being defined as a fore and aft direction, wherein the door body includes a door main body, an upper guided portion provided to an upper portion of the door main body, and a lower guided portion provided to a lower portion of the door main body, wherein the guide member includes an upper guide portion for guiding the upper guided portion along the lateral direction, a lower guide portion for guiding the lower guided portion along the lateral direction, and a restricting portion for restricting movement of the door main body along the fore and aft direction, wherein the upper guide portion supports the upper guided portion from below while restricting movement of the upper guided portion along the fore and aft direction, wherein the lower guide portion supports the lower guided portion from below while restricting movement of the lower guided portion along the fore and aft direction, wherein the door body is so dimensioned that the upper guided portion is moved upwardly away from the upper guide portion when in an expanded support state in which the lower guide portion is supporting the lower guided portion from below and in which the door main body has expanded from an initial form due to heat from a fire, wherein the restricting portion includes a first restricting portion and a second restricting portion, wherein, with one direction along the fore and aft direction being defined as a first direction and a direction along the fore and aft direction that is opposite from the first direction being defined as a second direction, wherein the first restricting portion includes a first contact portion which overlaps with an upper end portion of the door main body as seen along the fore and aft direction when in the expanded support state, wherein, when in the expanded support state, the first contact portion restricts movement of the door main body in the first direction by coming into contact with a surface of the upper end portion of the door main body that faces in the first direction, wherein the second restricting portion includes a second contact portion which overlaps with an upper end portion of the door main body as seen along the fore and aft direction when in the expanded support state, and wherein, when in the expanded support state, the second contact portion restricts movement of the door main body in the second direction by coming into contact with a surface of the upper end portion of the door main body that faces in the second direction.