JP2002272866A - Fire preventing door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire preventing door by which refuge is rapidly taken, burden on a refugee is relieved and also the promotion of fire is suppressed to restrict damage to the minimum. SOLUTION: The fire preventing door A is constituted by arranging an opening/closing louver 3 for mitigating a pressure difference between front and rear parts in the opening/closing direction of a door main body 1 in the hinged door type door main body 1 which is unlocked and opened by turning a knob 2 energized at a lock side. The knob 2 and the louver 3 are mutually linked so as to close the louver 3 when the knob 2 is locked and to open the louver 3 when the knob 2 is unlocked.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is used, for example, in an apartment building where a pressurized smoke prevention system is installed.
Regarding fire doors.

[0002]

2. Description of the Related Art For example, in a high-rise office building or a commercial building or the like, it is essential to evacuate safely and promptly in the event of a fire. In addition, pressurized smoke prevention systems have been widely introduced. 2. Description of the Related Art Conventionally, a pressurized smoke prevention system is configured to increase the pressure of each adjacent section so that smoke from a room where a fire has occurred (fire room) does not flow out to the surroundings. In other words, air is forcibly blown into corridors and emergency stairs by a pressurized fan, etc., while in a fire room,
It operates to operate the smoke exhaust system to discharge smoke out of the building. For this reason, the smoke cannot diffuse into a high-pressure corridor, an emergency stair, or the like, and almost all the smoke is sucked into the smoke exhaust device.

In order to maintain a pressure difference between the front and rear of the fire door, a fire door used for such an apartment building is closed in the event of a flame to increase airtightness. To secure airflow while holding,
Two types are widely used, one in which a predetermined opening degree is maintained at the time of a flame and a slight amount is opened.

[0004]

In the former fire door, an excessive pressure difference may be generated between the front and rear of the fire door depending on the air flow from a pressurizing fan or the like and other door opening / closing conditions. . In such a case, a very large force is required to open the fire door to the high pressure side, and for a weak disaster weak person such as an old man or a child, a great deal of trouble is posed during evacuation. Also, in the latter fire door, the pressure difference is reduced because it is not completely closed, but on the other hand, it allows air to flow into the fire room, and consequently supplies oxygen to the flame In other words, there is a problem that the fire may be promoted.

The present invention has been made in view of the above circumstances, and aims to speed up evacuation in the event of a fire and to reduce the labor of evacuees, and to minimize the damage by suppressing the promotion of fire. The purpose is to provide a door.

[0006]

According to the first aspect of the present invention, there is provided a fire door, which is unlocked by twisting a knob biased to a locking side and can be opened. An openable / closing gallery for reducing a pressure difference between front and rear directions of opening and closing the door, wherein the knob and the gallery are closed when the knob is locked, and the gallery is opened when the knob is unlocked. Are interlocked with each other.

As described above, since the knob and the gull are interlocked with each other, the gull is normally closed, and the gull is opened only when the knob is twisted, so that the pressure difference between the front and rear of the fire door is reduced. Can be alleviated.

According to a second aspect of the present invention, there is provided the fire door according to the first aspect, wherein each of the gulls is a plurality of movable blades which are rotatably supported and arranged adjacent to each other, and each of the movable blades is movable. Pulleys are provided on the blades and rotate integrally with the respective movable blades, and the pulleys and the knob are connected to each other via wires.

As described above, since the knob and the rattle are interlocked by the wire, the number of parts constituting the fire door can be reduced, the weight can be reduced, and the structure can be simplified.

According to a third aspect of the present invention, there is provided the fire door according to the second aspect, wherein each of the movable blades has a piece projecting in a rotating direction, and these pieces are provided when the rag is closed. The portions are pressed by the adjacent movable blades, respectively, so that the space between the movable blades is sealed.

As described above, since each movable blade is provided with a piece pressed against the adjacent movable blade when the rag is closed, the space between the movable blades is sealed by the two pieces. , The airtightness at the time of closing the rag can be made very high.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fire door according to the present invention will be described below with reference to FIGS. In the present embodiment, a building provided with the fire door is assumed to be a collective building in which a pressurized smoke prevention system is introduced. As shown in FIGS. 1 to 3, the fire door A is
A hinged door body (door) 1 is provided with a knob 2 and a rattle 3. The fire door A is rotatably supported by a wall plate (not shown) on the left end side in the drawing, that is, on the side opposite to the side where the knob 2 is provided. Has become. 2 and 3, the front side in the opening and closing direction of the fire door A is indicated by F, and the rear side in the opening and closing direction is indicated by R. The back is a room, the front is a corridor or other room.

The knob 2 is rotatably supported by the door body 1 and is interlocked with a lock (not shown) that can be protruded from the right end of the door body 1 in the drawing. When the fire door A is closed, the lock piece is fitted into a lock hole formed in the wall plate, and the fire door A is locked and cannot rotate. Knob 2
Is turned in the direction of the arrow in the figure, that is, when twisted, the lock piece is buried in the door main body 1, the fire door A is unlocked and can be turned,
That is, it can be opened. The knob 2 is normally urged to the side opposite to the arrow, that is, the locking side, by the action of a spring s described later.

The knob 2 is provided with a wire support 2a which rotates integrally with the knob 2, and one end of a wire w described later is fixed. That is, when the knob 2 is twisted, the wire w is pulled up.

The gallery 3 includes a substantially rectangular outer frame 31 which is opened so as to penetrate between the front and rear of the door body 1, a plurality of movable blades 32 each rotatably supported in the outer frame 31, and A pulley 33 provided on each of the movable blades 32 is provided. The pulleys 33 are provided on the movable blades 32 so as to rotate integrally with the respective movable blades 32. A wire w having one end fixed to the wire support 2a is wound around these pulleys 33. That is, each pulley 33 is connected to the knob 2 via the wire w, and each movable blade 32 rotates in conjunction with the movement of the knob 2.

The other end of the wire w is connected and fixed to one end of a spring s as shown in FIGS. 2 and 3, and the other end of the spring s is connected and fixed to the door body 1. Have been. That is, by the spring s, the knob 2 is urged in the direction opposite to the direction of the arrow in FIG. 1, that is, toward the locking side, and the movable blade 32 is urged to close.

As shown in FIG. 4, each movable blade 32
Has a long flat plate-shaped blade main body 32a, and a piece 32b protruding from the blade main body 32a in the rotation direction. These pieces 32b are pressed by the blade bodies 32a of the adjacent movable blades 32 when the louver 3 is closed, thereby closing the space between the movable blades 32-32. That is, the movable blade 3
The space between 2 and 32 is tightly sealed by the two pieces 32b and 32b.

When a fire occurs in the room behind the fire door A, the pressurized smoke prevention system operates to pressurize the front side of the fire door A as shown in FIG. At this time, the fire door A is closed and locked, and the louver 3 linked to the knob 2 is also closed. That is, the space between the movable blades 32 and 32 in the louver 3 is tightly sealed by the two pieces 32b, 32b, and high airtightness in the fire room is maintained. At this time, since the pressure difference between the front and rear of the fire door A is very large, a great force is required to open the fire door A while maintaining this pressure state.

When an evacuee from the fire room twists knob 2,
The fire door A is unlocked and can be opened. With this,
As shown in FIG. 3, when the wire w is pulled upward, the spring s is extended and the wire w moves. With the movement of the wire w, the pulley 33 and the movable blade 32 are rotated, and the gull 3 is opened. Rattle 3
Is opened, air can flow from the front side to the rear side of the fire door A, and the pressure difference between the front and rear of the fire door A is greatly reduced. Thereby, the fire door A can be opened with a small force.

When the hand is released from the knob 2, the wire w is pulled down by the urging force of the spring s to retract, and moves in the direction opposite to the previous direction. With the movement of the wire w, the pulley 33 and the movable blade 32 are also rotated in the opposite direction to the previous direction, and the gallery 3 is closed again. At the same time, the knob 2 also returns to the locked state. Therefore, if the fire door A is closed and locked, high airtightness in the fire room can be maintained again.

In the fire door A according to the present embodiment, the pressure between the front and rear in the opening and closing direction is applied to the door body 1 of the opening door type which can be unlocked and opened by twisting the knob 2 biased to the locking side. An openable / closing gallery 3 for reducing the difference is provided, and the knob 2 and the gallery 3 are linked to each other so that the gallery 3 is closed when the knob 2 is locked and the gallery 3 is opened when the knob 2 is unlocked. I have. Because of this, the gallery 3 is normally closed, and the gallery 3 is opened only when the knob 2 is twisted, so that the pressure difference between the front and rear of the fire door A can be reduced. Therefore, the fire door A can be opened with a small force. For example, even a weak disaster weak person such as an old man or a child can easily open the fire door A, thereby enabling quick evacuation. At the same time, labor at the time of evacuation can be reduced.

The gallery 3 is composed of a plurality of movable blades 32, each of which is rotatably supported and disposed adjacent to each other, and a pulley provided on each of the movable blades 32 and integrally rotating with each of the movable blades 32. 33, the pulley 33 and the knob 2
And are connected to each other via a wire w. Thus, the knob 2 and the gull 3 using the wire w
Are interlocked with each other, so that the number of components constituting the fire door A can be reduced, the weight can be reduced, and the configuration can be simplified. Therefore, occurrence of troubles such as failures can be suppressed, maintenance can be facilitated, and high durability and reliability can be secured.

Further, each movable blade 32 is provided with a blade main body 3.
2a, which protrude in the direction of rotation from the movable blade 3a when the louver 3 is closed.
Each of the movable blades 32-32 is pressed by the second blade main body 32 a so as to be in a sealed state. Because of this, the space between the movable blades 32 and 32 is sealed by the two pieces 32b, 32b, and the airtightness when the gallery 3 is closed can be made extremely high. Therefore, if the fire door A is immediately closed after the evacuees have evacuated from the flame chamber, the promotion of the fire in the flame chamber is suppressed, the fire extinguishing work can be speeded up, and damage can be minimized.

In the above embodiment, the knob and the gull are connected to each other via a wire so that they are linked to each other. However, the present invention is not limited to this. For example, a so-called rack and pinion type in which a rod formed with a rack is connected to the bulging side and a pinion gear meshing with the rack is provided to the knob side may be used. Needless to say, any other configuration may be adopted without departing from the spirit of the present invention.

[0025]

As described above, the fire door according to the present invention employs the above-described configuration, so that evacuation at the time of a fire can be expedited and the labor of evacuees can be reduced, and the fire force can be reduced. It is possible to provide a fire door capable of suppressing the promotion and minimizing the damage.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional front view showing an embodiment of a fire door according to the present invention.

FIG. 2 is a side sectional view of the fire door shown in FIG. 1;

FIG. 3 is a side sectional view of the fire door shown in FIG. 1;

FIG. 4 is an enlarged view showing a part of FIG. 2;

[Explanation of symbols]

 A fire door 1 door body (door) 2 knob 3 rattle 32 movable blade 32a blade body 32b one piece 33 pulley w wire s spring

Claims (3)

[Claims] 1. An opening / closing rattle for reducing a pressure difference between front and rear directions of opening and closing of a door which can be opened by being unlocked by twisting a knob biased to a locking side. A fire door, wherein the knob and the louver are interlocked so that the louver is closed when the knob is locked and the louver is opened when the knob is unlocked. 2. The gallery has a plurality of movable blades, each of which is rotatably supported and arranged adjacent to each other, and a pulley provided on each of the movable blades and rotating integrally with each of the movable blades. The fire door according to claim 1, wherein the pulley and the knob are connected to each other via a wire. 3. Each of the movable blades has a piece protruding in a rotating direction, and when the rag is closed, these pieces are pressed by the adjacent movable blades to seal between the movable blades. The fire door according to claim 2, wherein the fire door is in a state.