Fire protection apparatus and fire protection method

A fire protection method comprising:

• (a) adjusting a gap between a door frame and an installation surface of a building by using a position adjusting device to improve sealability of a sub-shutter device;
• (b) opening a main passage space between the door frame and a guide rail by using a main shutter device;
• (c) closing the main passage space between the door frame and the guide rail by using the main shutter device when a fire breaks out;
• and
• (d) closing an internal space of the guide rail by using the sub-shutter device associated with the main shutter device, when the main shutter device is closed.

A fire protection apparatus comprising:

• a door frame mounted in a vertical passage between an upper floor and a lower floor of a building or in a horizontal passage between a first compartment and a second compartment of the building;
• a guide rail provided at a side of the door frame to guide a lift to pass through the vertical passage or to guide a carriage to pass through the horizontal passage;
• a main shutter device mounted on the door frame to open or close a main passage space between the door frame and the guide rail;
• a sub-shutter device mounted on the main shutter device to close an internal space of the guide rail in association with the main shutter device when the main shutter device is closed;
• and
• a position adjusting device mounted between an installation surface of the building and the door frame to improve sealability of the sub-shutter device, and adjusting a position of the door frame,
• wherein the position adjusting device comprises:
• a base mounted on the installation surface of the building;
• a screw rod mounted on the base;
• and
• a nut member screw-coupled to the screw rod to move forward or backward so as to support the door frame,
• wherein the guide rail is provided, at a side, with a hollow part through which the sub-shutter device passes and which has a sufficient height greater than a maximum height of the sub-shutter device adjustable by the position adjusting device,
• wherein the sub-shutter device comprises:
• a housing fixed to the main shutter device and having a storage space;
• a push bar protruding from the housing and mounted on the housing to slide in a first direction;
• an expandable wing mounted in the storage space of the housing to slide in a second direction so as to be stretched out or retracted in;
• a power transmitter for converting first-direction motion into second-direction motion to stretch out the expandable wing in the second direction when the push bar is pressed in the first direction;
• and
• an elastic spring for applying elastic restoring force in a forward direction of the push bar,
• wherein the power transmitter comprises an inclined link having an end hinge-coupled to a bar hinge shaft provided at a side of the push bar, and another end hinge-coupled to a wing hinge shaft provided at a rear end of the expandable wing and penetrating through a guide hole formed in the housing along the second direction,
• wherein the housing is provided in a shape corresponding to the hollow part formed in the guide rail such that at least a portion of the housing penetrates through the hollow part to stretch out the expandable wing,
• wherein the main shutter device comprises:
• a first main shutter mounted at a side of a main shutter guide member mounted on the door frame, and moved along the main shutter guide member;
• a second main shutter mounted at another side of the main shutter guide member mounted on the door frame, and moved along the main shutter guide member;
• and
• a shutter driver for driving the first and second main shutters toward or away from each other by using a single motor,
• wherein the sub-shutter device comprises:
• a first sub-shutter mounted at a front end of the first main shutter;
• and
• a second sub-shutter mounted at a front end of the second main shutter to correspond to the first sub-shutter, and
• wherein the guide rail comprises:
• a first rail for guiding a side of the lift or the carriage;
• and
• a second rail for guiding another side of the lift or the carriage.