JP3085142B2 - Fire and smoke protection systems - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire and smoke control system for blocking the inside of a fire protection zone by a roll screen.

[0002]

2. Description of the Related Art According to the Building Standards Law, a place where a fire section is required must be separated by a floor or wall of a fireproof structure, a class A fire door or a class B fire door.
For this reason, when partitioning a space that is used as an integrated space on a daily basis, it is necessary to partition with a fireproof shutter or a fireproof smokeproof shutter.

[0003] In the fire door of this structure, once closed, no one can enter or exit, causing another problem of safety.
In addition, in order to increase the storage volume in the normal storage state, it has recently been proposed to substitute a roll screen as a smokeproof hanging wall.

[0004] This roll screen is of a non-combustible type in which a resin is coated on a glass cloth substrate, but cannot maintain the same fire resistance as a fireproof shutter.

Therefore, as shown in FIG. 4, a pair of watering heads 3 are provided on the ceiling surfaces 2 on both sides of the roll screen 1, and the partitions 4 on both sides of the roll screen 1.
It is proposed that when a fire 5 occurs on one of the sides a and 4b, the roll screen 1 is erected and water is sprayed from both spray heads 3 onto both sides of the roll screen 1 or the fire surface. By spraying water, the temperature rise on the surface of the roll screen 1 is suppressed, and by keeping the temperature below the ignition or melting temperature, the cutoff state by the roll screen 1 can be maintained, and the spread of fire from the fire section 4a to the non-fire section 4b side can be prevented. . Even if a gap is provided at the lower portion of the roll screen 1, the water film flowing down the lower portion maintains the blocking effect, so that the visibility can be secured.

[0006]

Considering the nature of the smoke, when a fire 5 occurs in a room, the smoke stays in a layer at the lower portion of the ceiling surface to form a smoke layer 5a, and the thickness of the layer is gradually increased. It has been elucidated from this fact that a space where humans can survive is secured below it for a certain period of time.

However, when water is sprayed from the fire compartment 4a toward the roll screen 1, the smoke layer 5a is disturbed by the strong downward water force and diffuses throughout the fire compartment 4a.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fire and smoke control system which can prevent ignition of a roll screen and keep the temperature at or below a melting temperature while preventing the diffusion of layered smoke in a fire generating section. It is.

[0009]

According to the present invention, there is provided a roll screen which is housed in a ceiling in a fire protection compartment, is suspended in the fire protection compartment when a fire occurs, and partitions the fire protection compartment, and sandwiches the roll screen. A pair of watering heads arranged on the ceiling surface and facing the watering surface to the screen surface of the roll screen, and when a fire occurs, only the watering head located on the non-fire occurrence area side performs the watering operation.

[0010]

[Function] Since the water spraying operation of the water spray head on the fire occurrence side is not performed, smoke in the fire occurrence section remains in a layered manner. On the other hand, the surface on the non-fire occurrence side of the roll screen has no rise in surface temperature due to water spray.

[0011]

FIG. 1 is an explanatory view showing a fire and smoke control system according to the present invention, in which 10 is a floor, 12 is a ceiling, and 1 is a ceiling.
The retractor 14 is disposed in the space above the ceiling 2 and the floor 10
A roll screen 18 that partitions a fire protection section 16 surrounded by the ceiling 12 and the left and right sides is housed in a wound state.
The retractor 14 includes a retractor housing 14b having a slit 14a opened on the lower surface, a winding shaft 14c of the roll screen 18, and a motor 14d for the winding shaft 14c.

A fire extinguishing pipe 20 is disposed in the space above the ceiling, and branch pipes 22a and 22b are connected to the pipe 20 on the left and right sides of the retractor 14, and electromagnetic valves 26a are provided to watering heads 24a and 24b provided on the ceiling 12, respectively. , 26b
Is communicated through.

The water spray heads 24a and 24b are mounted on the front and back surfaces of the roll screen 18 at positions where water can be sprayed.

[0014] Fire detectors 28 are arranged at a plurality of locations on the ceiling surface, and their detection outputs are input to the control units 3030a and 30b. The control units 30a and 30b are the roll screen 1
8 are separated into two systems. In each case, the motor 14d is driven by the detection output of the fire detector 28, or the stopper of the automatic descent device (not shown) is removed.
Lower the roll screen 18 as shown in FIG.
6 is divided into a fire A outbreak section 16a and a non-fire outbreak section 16b.

At the same time, the control unit 30a of the fire occurrence section 16a
Is a solenoid valve 26b connected to the branch pipe 22b in the opposite section.
As shown in FIG. 3, the solenoid valve 26a on the fire occurrence section 16a side is also opened with a predetermined time delay via the timer 32a. The other control unit 30b performs the same control. The set time of the timer 32a is set in consideration of the evacuation time of the victim.

As a result, in the initial stage of the fire occurrence, as shown in FIG.
Only the side surface is sprinkled W. In addition, even if the lower end of the roll screen 18 does not contact the floor 10, the water flowing down the screen surface forms a water film W1 to obtain a blocking effect. In addition, the disaster victims have a good view ahead, and firefighters have an advantage in firefighting activities.

When the fire A becomes intense as time elapses from this state, the timer 32a times out after a predetermined time elapses, and the water W is also sprayed on the surface of the roll screen 18 on the fire occurrence section 16a side as shown in FIG. Made and enhances the cooling effect. In this state, the smoke layer B is disturbed in the same manner as before, but since the evacuation has been completed by this time, the roll screen 18 is more disturbed than the disturbance.
Weight will be placed on ensuring the cut-off state.

When the fire is extinguished from the fire occurrence state shown in FIG. 2, the sprinkling valve is closed automatically or in response to a manual return operation, and further, the roll screen 18 is wound up by operating the motor 14d or manually. It returns to the normal state shown in FIG. 1 again.

In this embodiment, the timer is used to spray water from the roll screen to the fire generating section 16a. However, the roll screen is included in the fire detector on the fire generating section 16a side, or a heat sensor (not shown) provided separately. The detection may be performed when a sensor (such as a fuse of a watering head) detects a predetermined temperature (a temperature higher than the initial temperature).

[0020]

In the fire and smoke prevention system according to the present invention, since the water spraying head on the fire occurrence side does not perform water spraying operation, the smoke in the fire occurrence section remains in a layered state.
The lower part can be secured as a space where humans can survive.In addition, since the surface of the roll screen on the non-fire occurrence side is sprinkled and the surface temperature does not rise, the roll screen is kept at the ignition or melting temperature or less, and it is shut off Can be maintained.

[Brief description of the drawings]

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

FIG. 2 is an explanatory diagram showing an initial operation state of the fire and smoke prevention system.

FIG. 3 is an explanatory diagram showing an operation state of the fire and smoke prevention system after a predetermined time has elapsed.

FIG. 4 is an explanatory diagram showing an operation state of a conventional fire and smoke prevention system.

[Explanation of symbols]

 10 Ceiling 14 Retractor 16 Fire protection section 18 Roll screen 24a, 24b Sprinkling head

Claims (1)

(57) [Claims] 1. A roll screen which is housed in a ceiling in a fire protection compartment, is suspended in the fire protection compartment when a fire occurs and partitions the fire protection compartment, and is disposed on a ceiling surface with the roll screen interposed therebetween. A fire and smoke prevention system comprising a pair of water spray heads having a water spray surface directed to a screen surface of a roll screen, and when a fire occurs, only a water spray head located on a non-fire occurrence area side performs water spray operation.