JPH08299484A - Fire-proof and smoke-proof system - Google Patents

Abstract

PURPOSE: To prevent laminated smoke staying in a fire breakout area from diffusion and hold a roll screen below firing or fusing temperature. CONSTITUTION: This system comprises a roll screen 18 received in a ceiling 10 within a fire-proof area 16 and suspended in the fire-proof area 16 by fire breakout to define the fire-proof area 16 and a pair of sprinkler heads 24a, 24b disposed on the ceiling 10 surface to sandwich the roll screen 18 and direct the sprinkling surfaces to the screen surface. In the fire-breakout, only the sprinkler head 24b located on non-fire breakout area side is operated to sprinkle.

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 prevention system in which the inside of a fire prevention compartment is blocked by a roll screen.

[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, a Class A fire door or a Class B fire door.
Therefore, when partitioning a space used as an integrated space on a daily basis, it is necessary to partition the space with a fireproof shutter or a fireproof smokeproof shutter.

In the fire door of this structure, once it is closed, no one can enter or exit, which causes another problem of safety.
Further, in order to secure a large storage volume in the normal storage state, it has recently been proposed to replace it with a roll screen which is a smoke-proof hanging wall.

This roll screen is usually of a non-combustible type in which a glass cloth base material is coated with resin, but it cannot maintain the same fire resistance as a fireproof shutter.

Therefore, as shown in FIG. 4, a pair of sprinkling heads 3 are provided on the ceiling surfaces 2 on both sides of the roll screen 1, and the compartments 4 on both sides of the roll screen 1 are arranged.
When a fire 5 occurs on one of a and 4b, it is proposed that the roll screen 1 be hung vertically and at the same time water be sprinkled on both sides of the roll screen 1 or on the fire surface from both sprinkling heads 3. By suppressing the temperature rise on the surface of the roll screen 1 by spraying water, and keeping the temperature below the ignition or melting temperature, the cutoff state by the roll screen 1 can be maintained, and the spread of the fire from the fire section 4a to the non-fire section 4b can be prevented. . Even if a gap is provided in 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 properties of smoke, when a fire 5 occurs in a room, the smoke stays in layers at the lower part of the ceiling surface to form a smoke layer 5a, and the layer thickness is gradually increased. Therefore, it has been clarified that a space where humans can survive is secured under the certain time.

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

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a fire and smoke prevention system capable of keeping the roll screen igniting or keeping the temperature below the melting temperature while preventing the diffusion of smoke accumulated in layers in the fire generating compartment. Is.

[0009]

According to the present invention, there is provided a roll screen which is housed in a ceiling in a fireproof compartment and vertically installed in the firebreak compartment to partition the fireproof compartment, and a roll screen sandwiched between the roll screen. Is provided on the ceiling surface and has a pair of water sprinkling heads whose water sprinkling surfaces face the screen surface of the roll screen. When a fire occurs, only the water sprinkling heads located on the non-fire area are operated for water sprinkling.

[0010]

[Operation] Since the water spray head on the fire generating side does not perform the water spraying operation, the smoke in the fire generating compartment remains accumulated in layers. On the other hand, the surface of the roll screen on the non-fire occurrence side does not rise in surface temperature due to water spray.

[0011]

1 is an explanatory view showing a fire and smoke prevention system according to the present invention. 10 is a floor, 12 is a ceiling, and 1 is a ceiling.
The retractor 14 is arranged in the space above the ceiling 2 and the floor 10
A roll screen 18 for partitioning the fireproof section 16 surrounded by the ceiling 12 and the ceiling 12 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 of the winding shaft 14c.

In addition, a fire extinguishing pipe 20 is arranged in the space above the ceiling, branch pipes 22a and 22b are connected to the pipes 20 on the left and right of the retractor 14, and water spray heads 24a and 24b provided on the ceiling 12 respectively have solenoid valves 26a. , 26b
Through the.

The sprinkling heads 24a and 24b are attached to the front and back surfaces of the roll screen 18 at positions where water can be sprinkled.

Fire detectors 28 are arranged at a plurality of positions on the ceiling surface, and the detection outputs are input to the control units 3030a and 30b. The control units 30a and 30b are the roll screen 1
8 are sandwiched between the two systems, each of which drives the motor 14d by the detection output of the fire detector 28 or removes the stopper of the automatic lowering device (not shown).
The roll screen 18 is lowered as shown in FIG.
6 is divided into a fire A generation section 16a and a non-generation section 16b.

At the same time, the control section 30a of the fire generating section 16a
Is a solenoid valve 26b connected to the branch pipe 22b in the opposite section
Is opened, and as shown in FIG. 3, the solenoid valve 26a on the side of the fire occurrence section 16a is also opened with a predetermined time delay via the timer 32a. The other side control unit 30b also performs similar 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 fire occurrence, as shown in FIG. 2, the non-fire occurrence section 16b of the roll screen 18 is shown.
Only the surface on the side is watered W. Even if the lower end of the roll screen 18 does not come into contact with the floor 10, the water flowing down the screen surface forms a water film W1 to obtain a blocking effect. In addition, it is possible for the disaster victims to have a forward view, which is advantageous for firefighters in fire fighting activities.

When the fire A becomes more intense with the passage of time from this state, the timer 32a expires after a lapse of a predetermined time, and as shown in FIG. 3, the water W is sprinkled on the surface of the roll screen 18 on the side where the fire is generated 16a. Made to enhance the cooling effect. In this state, the smoke layer B is disturbed as in the conventional case, but by this time the victim has completed the evacuation, so the roll screen 18 is more disturbed than the disturbance.
The importance will be placed on securing the cutoff state.

When the fire is extinguished from the state shown in FIG. 2, the water spray valve is closed automatically or in response to a manual return operation, and the roll screen 18 is wound up by the operation of the motor 14d or manually. The normal state shown in FIG. 1 is restored again.

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

[0020]

In the fire and smoke prevention system according to the present invention, since the water spray head of the fire generating side does not perform the water spraying operation, the smoke in the fire generating compartment remains accumulated in layers,
The lower part of the roll screen can be secured as a space where humans can survive.Since the surface of the roll screen on the non-fire occurrence side is sprinkled with water and the surface temperature does not rise, the roll screen is kept below the ignition or melting temperature and is in the cutoff state. Can be maintained.

[Brief description of drawings]

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

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

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

FIG. 4 is an explanatory diagram showing an operating 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)

[Claims] 1. A roll screen housed in the ceiling of the fireproof compartment and vertically installed in the fireproof compartment to partition the fireproof compartment when a fire occurs, and the roll screen is disposed on the ceiling surface with the roll screen interposed therebetween. A fire and smoke prevention system, which comprises a pair of water spraying heads with the water spraying surface facing the screen surface of the roll screen, and in the event of a fire only the water spraying heads located on the non-fire area are operated.