JPH0938224A - Fire proof smoke proof equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent influence of the passing pressure of heat or smoke on a steel shutter and improve smoke proof performance by providing the steel shutter for interrupting a fire protecting section when a fire breaks out, exhaust fans arranged on both the sides thereof, and means for driving the exhaust fan on the fire area side. SOLUTION: When any one fire detector 34 detects a fire, a motor 14d is driven to lower a steel shutter 18, and the generating section 16a of a fire A is partitioned from non-generating section 16b. Only a control part 36a on the generating section 16a side is operated to drive an exhaust fan 22a in the generating section 16a, and a blower 24b on the non-generating section 16b side is driven. The generating section 16a is laid into negative pressure by this suction, and the non-generating section 16b is pressurized by the air blowing. Air is carried from the non-generating section 16b side to the generating section 16a side through a clearance in the joint part of the steel shutter 18 by this pressure difference so that the fire never directly wipes the surface of the steel shutter 18, an excessive temperature rise is thus prevented, and no smoke is carried to the non-generating section 16b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fireproof and smokeproof facility in which the interior of a fireproof compartment is blocked by a steel shutter.

[0002]

2. Description of the Related Art According to the Building Standards Law, a place where a fireproof section is required must be partitioned by a floor or wall of fireproof structure or a Class A fire door or a Class B fire door.

One of the fire and smoke doors is a steel shutter 1 shown in FIG. As shown in an enlarged view of a part of the drawing, the steel shutter 1 is formed by connecting a large number of steel slats 1a via a joint portion 1b in a bendable manner. Then, when a fire occurs, it is unrolled into the fire-prevention section and deployed to block the inside of the fire-prevention section into the fire-occurring area 2a and the non-occurrence area 2b.

[0004]

When the corresponding steel shutter 1 is closest to the origin of the flame, the heat generated by the flame 3 lowers the rigidity and creates a gap in the seam 1b between the slats 1a, and the flame 3 or the flame is generated. Non-generation area 2b from the gap due to smoke pressure
Smoke leaks to the side.

In particular, the wider the width of the steel shutter 1, the lower the rigidity of the seam 1b, and the higher the tendency of the smoke prevention performance due to heat becomes. For this reason, the maximum width of the steel shutter 1 is limited to 5 m. For example, in the case of a fireproof section having an extremely large opening width, such as a large space blow-through such as an atrium and a connecting portion with each floor, the steel shutter 1 Has to be divided into a plurality of parts in the width direction and the adjacent steel shutters 1 must be connected by the shutter rail guide, which has been an obstacle in automating opening and closing.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a fire and smoke preventive equipment in which the influence of heat and the distribution pressure of smoke and the like on a shutter made of steel is prevented and the smoke preventive performance is improved.

[0007]

According to the present invention, there is provided a steel shutter which is deployed in a fireproof compartment when a fire occurs and shuts off the fireproof compartment, and exhaust fans arranged on both sides of the steel shutter. And a means for driving an exhaust fan on the side of the fire occurrence area partitioned by the steel shutter when a fire occurs (claim 1).

Further, it is possible to further provide air blowing means on both sides of the steel shutter to drive the air blowing means on the side of the non-fire generating area in the event of a fire (claim 2).

Further, the fire / smoke-proof compartment is a fire-proof compartment on the boundary with the void space in the building such as an atrium, and the spacing between the guide pillars of the shutter rail of the steel shutter may be set larger than usual. Yes (Claim 3).

According to the first aspect of the present invention, a negative pressure is generated by the exhaust gas on the side of the fire generating area that sandwiches the steel shutter, and the air flow flows from the non-generating area side to the generating area through the steel shutter due to the pressure difference.

According to the second aspect of the present invention, in addition to the exhaust gas on the side of the fire occurrence area, the air is pressurized by the air blow on the side of the non-generation area, so that the air flow due to the pressure difference is surely generated from the side of the non-generation area. Can be formed toward.

According to the third aspect, the interval between the guide pillars of the shutter rail can be set to be sufficiently large, and the design design can be made to produce the scenery of the atrium as a magnificent space.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view showing a fire and smoke prevention equipment according to the present invention, 10 is a floor, 12 is a ceiling,
A winding device 14 is arranged behind the ceiling 12, and the winding device 1
A steel shutter 18 having the same structure as the conventional one, which partitions a fireproof compartment 16 surrounded by a floor 10 and a ceiling 12, is housed in the interior of the reel 4.

The winding device 14 is provided with a shutter case 14b having a slit 14a opened on the lower surface, a winding shaft 14c of a steel shutter 18, and a motor 14d for driving the winding shaft 14c in forward and reverse directions.

In the space above the ceiling, a pair of exhaust fans 22a and 22b and blowers 24a and 24b are arranged on the left and right sides of the winding device 14, and the ducts 26 are respectively provided.
Air inlets 30a, 30b and air outlets 32a, 32 with one end opened to the ceiling surface via a, 26b, 28a, 28b
b, and the other end is connected to the outside of the building (not shown).

Fire detectors 34 are provided at a plurality of locations on the ceiling 12 surface.
The detection outputs of these are input to the control units 36a and 36b as a pair of driving means arranged behind the ceiling with the steel shutter 18 interposed therebetween.

The output ends of both control units 36a and 36b are connected to the motor 14d, and the motor 14d is driven by the detection output of one of the fire detectors 34 to drive the steel shutter 18 as shown in FIG. Lower the space 16 into the flame A generation area 1
6a and a non-generation area 16b.

The output end of the control section 36a on the side of the generation area 16a is connected to the exhaust fan 22a of the same area 16a, and is cross-connected to the blower 24b of 16b in the opposite area.

Similarly, the output end of the non-generation area 16b side control section 36b is connected to the exhaust fan 22b of the area 16b,
Further, the blower 24a of 16b in the opposite area is connected to cross.

Therefore, in this case, only the control section 36a on the side of the generation area operates to drive the exhaust fan 22a of the generation area 16a and at the same time drive the blower 24b on the side of the opposite side, and as a result, suction on the side of the generation area 16a. Then, a negative pressure is generated, and the non-generation area 16b is pressurized by blowing air.

Due to this pressure difference, the air is caused by the steel shutter 18
The flame A flows from the non-fire occurrence area 16b side to the fire occurrence area 16a side through the gap of the seam, and the flame A does not directly lick the surface of the steel shutter 18 due to this air flow, preventing an excessive temperature rise. At the same time, smoke is also non-fire area 1
There is no flow on the 6b side, and the cutoff state is maintained.

In this embodiment, the fire-proof and smoke-proof compartment between the same floors in the building is used. However, when it is used as a fire-proof compartment at the boundary with the void space in the building such as an atrium, the guide pillar of the shutter rail is used. The space between the two can be made large enough, and the design can be designed to produce a magnificent view of the landscape of the atrium.

Further, in the present embodiment, the drive device of the winding device is the motor 14d for forward and reverse rotation drive, but it may be a normal motor with an automatic lowering control stopper or a manual hoisting device to automatically control the lowering in case of fire. The stopper may be released automatically or manually to lower it.Furthermore, the air supply fan of the air supply / exhaust means used as the air supply means is operated to forcibly supply air and pressurize. However,
Only exhaust may be used.

It is also possible to use all or part of the air supply / exhaust means also as a duct of an ordinary air conditioning equipment.

When the fire occurrence area is opposite to that shown in the figure, only the control section 36b on the opposite side operates to drive the exhaust fan 22b and the blower 24a on the opposite side.

[0026]

The fireproof and smokeproof equipment according to the invention of claim 1 is
Negative pressure is created by suction on the side of the fire generating area that sandwiches the steel shutter, and the pressure difference causes the air flow to flow from the non-generating area side to the generating area through the steel shutter. It is possible to maintain the cutoff state.

According to the second aspect of the present invention, since the non-fire generating area side is pressurized by the blown air, the shut-off state can be reliably maintained.

According to the third aspect of the invention, the width of the steel shutter can be made sufficiently wide even in a fireproof section having an extremely large opening width such as a connecting portion with each floor of a large space such as an atrium. It is suitable for automating opening and closing work and quick response in case of fire.
It can be designed to create a magnificent view of the landscape of the atrium.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a normal state of the fire and smoke prevention equipment of the present invention.

FIG. 2 is an explanatory diagram showing a moving state of the fire and smoke prevention equipment.

FIG. 3 is an explanatory diagram showing an operating state of a conventional fire and smoke prevention facility.

[Explanation of symbols]

 10 Ceiling 16 Fireproof Section 16a Fire Occurrence Area 16b Non-Fire Occurrence Area 18 Steel Shutters 22a, 22b Exhaust Fans 24a, 24b Blowers 36a, 36b Control Unit (Drive Means)

Claims (3)

[Claims] 1. A steel shutter that is deployed in a fireproof compartment when a fire occurs and shuts off the fireproof compartment, and exhaust fans that are arranged on both sides of the steel shutter and are partitioned by the steel shutter.
A fire and smoke prevention equipment, comprising means for driving an exhaust fan on the side of the fire occurrence area defined by the steel shutter when a fire occurs. 2. The fire and smoke preventive device according to claim 1, wherein air blowers are further provided on both sides of the steel shutter to drive the blowers on the side of the non-fire area in the event of a fire. 3. The fire / smoke-proof compartment is a fire-proof compartment on the boundary with a void space in a building such as an atrium, and the spacing between guide pillars of the shutter rail of the steel shutter is set larger than usual. The fire and smoke proof device according to claim 1 or 2.