JPH0370982B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides a fire prevention system that sequentially controls hanging walls and fire doors arranged in combination to partition fire prevention compartments along an evacuation route according to smoke concentration. The present invention relates to a control device.

(Prior art) Conventionally, in the case of disaster prevention equipment that separates fire compartments,
Fire doors are installed in corridors leading to evacuation exits such as emergency stairs, and the fire doors are closed manually or in conjunction with fire detection to form a fire prevention section and prevent the spread and spread of fire.

On the other hand, in large rooms such as department store sales floors or halls with few partition walls, hanging walls are installed to suppress the spread of smoke in the event of a fire. The walls are lowered to suppress the spread of smoke along the ceiling.

(Problems to be Solved by the Invention) However, in the case of such conventional disaster prevention equipment in which a fire door is provided to separate fire compartments, for example, in conjunction with the detection of a predetermined smoke concentration by a smoke detector, Since the fire door was set to be fully closed, the evacuation route would also be closed when the fire door operated, and in the unlikely event that someone was left in the area where the fire occurred, the closed fire door could be pushed open. Fire doors were relatively heavy, so if a large number of people rushed in, there was a risk of panic and increased human casualties.

In addition, for wide hallways with high ceilings,
As the fire door becomes larger, the structure of the fire door becomes more extensive, such as the need to further install a child door for evacuation inside the door, and it is difficult to prevent smoke from spreading until the fire door is closed. Nakatsuta.

(Means for Solving the Problems) The present invention has been made in view of such conventional problems, and effectively utilizes a facility configuration in which fire protection compartments are partitioned by a combination arrangement of hanging walls and fire doors. To provide a control device for fire prevention equipment, which suppresses the spread of smoke to an evacuation route without obstructing the evacuation route when the smoke concentration is low, and forms a fire prevention division only when the smoke density reaches a level dangerous for the evacuation route. The purpose is to

In order to achieve this objective, the present invention arranges hanging walls and fire doors in combination so as to form a fire prevention section in the middle of the evacuation route toward the emergency exit, etc., and also arranges hanging walls and fire doors in combination in the installation area A smoke concentration sensor is provided to detect smoke concentration, and when the detected smoke concentration reaches a predetermined first threshold, for example, a fire smoke concentration that allows evacuation, the hanging wall is driven downward to create an evacuation route. This system prevents smoke from dispersing to the evacuation route, and furthermore, when the detected smoke concentration reaches a second threshold that is higher than the first threshold, which is dangerous for the evacuation route, the fire door is closed to form a fire prevention zone. It was designed to do so.

(Embodiment) FIG. 1 is a block diagram showing an embodiment of the present invention.

First, to explain the configuration, 1 is a smoke concentration sensor, which detects smoke in an area where hanging walls and fire doors are installed in combination to form a fire prevention section in the middle of a corridor that serves as an evacuation route leading to an emergency staircase, etc. Detect concentration.

FIG. 2 is an explanatory diagram of a hallway serving as an evacuation route showing the installation state of the smoke concentration sensor 1 shown in FIG. 1. As shown in FIG. 3, a hanging wall 7 that is driven downward is installed, and, as an example, a double-opening fire door 9 is installed so that the evacuation route that is open when the hanging wall 7 is lowered as shown in FIG. 3 can be closed. By lowering the hanging wall 7 and closing the fire door 9, a fireproof compartment can be formed as a partition. The smoke concentration sensor 1 is installed on the ceiling surface 11 on the entrance side where the hanging wall 7 and the fire door 9 are installed in combination, as shown in the figure.

In addition, in the equipment shown in Fig. 2, the hanging wall 7 and the fire door 9
Another smoke concentration sensor 1a is also installed on the ceiling surface 11 on the exit side of the
The figure shows the case where .

Referring again to FIG. 1, the detection signal of the smoke concentration sensor 1 is detected by a comparator 2 provided as a smoke concentration determination means.
3 is input. A first threshold value is set in the comparator 2 by the reference voltage source 4, and this first threshold value is the fire smoke concentration, but the smoke concentration that allows safe evacuation, for example, 10%/m is the first threshold value. This is set as the first threshold.

On the other hand, the comparator 3 is supplied with a second voltage by the reference voltage source 5.
A threshold value is set, and this second threshold value is set to a smoke density that is dangerous for an evacuation route, for example, 20%/m. Therefore, the comparator 2 produces an H level output when the detected smoke concentration exceeds the first threshold by the reference voltage source 4, and the comparator 3 produces an H level output when the detected smoke concentration exceeds the second threshold by the reference voltage source 5. When the smoke density is obtained, an H level output is generated.

The output of the comparator 2 is given to the hanging wall control section 6,
When the hanging wall control unit 6 receives the H level output from the comparator 2, it controls the hanging wall 7 installed on the ceiling side of the hallway 10, which is an evacuation route, to descend as shown in FIG. Further, the output of the comparator 3 is given to the fire door control section 8, and the fire door control section 8 receives the H from the comparator 3.
When a level output is obtained, the fire door 9, which is kept open in both directions, is unlatched so as to close the open position below the hanging wall 7, and the fire door 9 is controlled to be fully closed, as shown in Fig. 4. do.

Next, the operation of the above embodiment will be explained.

If a fire breaks out in a certain place in the building, the smoke from the fire will spread along the ceiling surface 11 of the hallway 10 shown in FIG.
The smoke density is detected by a smoke density sensor 1 provided in front of the installation position of the smoke sensor 1, and a smoke detection signal is given to the comparators 2 and 3 shown in FIG. When the smoke detection signal from the smoke concentration sensor 1 reaches a first threshold value determined by the reference voltage source 4, for example 10%/m, the comparator 2 produces an H level output, and the signal drops in response to the H level output of the comparator 2. The wall control unit 6 lowers the hanging wall 7 from the ceiling surface 11 as shown in FIG.

When the detected smoke concentration reaches the first threshold, the hanging wall 7 is lowered, and the fire smoke that has spread along the ceiling surface 11 of the hallway 10, which is an evacuation route, is moved toward the emergency exit by the lowered hanging wall 7. The spread of the virus is suppressed. Furthermore, even if the hanging wall 7 is lowered, the height of the hanging wall 7 at the time of descent is high enough for a person to pass through, so the evacuation route to the emergency stairs or emergency exit is not obstructed, and the hanging wall 7 By lowering the roof, an evacuation route can be secured while suppressing the spread of smoke.

Furthermore, as the smoke density increases as the fire progresses,
The smoke detection signal of the smoke concentration sensor 1 is set to a second threshold value based on the reference voltage source set in the comparator 3, for example 20
%/m, the comparator 3 produces an H level output, and the fire door control section 8 operates to release the latch of the fire door 9 which is in the open state, and the fire door is opened as shown in FIG. 9 is fully closed, and the hallway 10, which has reached a dangerous smoke concentration as an evacuation route, is completely closed by the hanging walls 7 and the fire door 9, thereby forming a fireproof compartment to prevent the spread and spread of fire.

FIG. 5 is a block diagram showing another embodiment of the present invention. In this embodiment, since the hanging wall 7 and the fire door 9 are installed in the fire prevention equipment shown in FIG. 2, the smoke concentration sensors 1 and 1a are installed in front and behind the ceiling surface. A feature is that hanging walls and fire doors are controlled based on the detected smoke concentration in step 1a.

That is, the detection output of the smoke concentration sensor 1 installed in front of the installation location of the hanging wall 7 and the fire door 9 is given to the comparators 2 and 3 as in the embodiment shown in FIG. First and second thresholds are set by the reference voltage sources 4 and 5, as in the embodiment shown in FIG. It operates to lower the hanging wall 7.

On the other hand, the detection output of the smoke concentration sensor 1a installed outside the installation area of the hanging wall 7 and the fire door 9 is given to the comparator 12, and the comparator 12 is supplied with a third threshold is set. As this third threshold, for example, the first threshold
15%/m between 10%/m and the second threshold 20%/m
The smoke density of m is set, and the smoke density sensor 1a
When the detected smoke concentration exceeds the third threshold value of 15%/m, the comparator 12 produces an H level output.

The fire door control unit 8a controls the closing of the fire door based on the output of the comparator 3 in which the second threshold value is set and the output of the comparator 12 in which the third threshold value is set. 12, the fire door is controlled to close when H level outputs are obtained from both.

According to the embodiment of FIG. 5, the hanging wall 7
After descending, the smoke concentration detected by the smoke concentration sensor 1 installed on the ceiling in front of the hanging wall 7 reaches the second threshold value 20
%/m, and the smoke concentration detected by the smoke concentration sensor 1a installed on the outer ceiling surface of the hanging wall reaches the third threshold value 15.
%/m, the fire doors are driven to close, and the smoke concentration is not limited to the area in front of the hanging wall 7 that has been lowered to suppress the spread of smoke, but also to the outside of the hanging wall 7, such as the emergency stairs and When the smoke concentration on the emergency exit side of the evacuation route reaches a dangerous level, the fire door will be closed and a fire prevention zone will be created. Therefore, the fire door should be closed until the smoke concentration on the emergency exit and emergency staircase side reaches the dangerous level. It is possible to secure an evacuation route without any problems, and to extend the time during which the evacuation route can be secured.

Of course, the third threshold value of the comparator 12 in FIG. By setting the same smoke density, the time required to secure an evacuation route can be further extended.

Furthermore, smoke concentration sensors 1, 1a installed at the entrance/exit
The hanging wall and the fire door may be operated sequentially based on the higher detected smoke concentration.

Note that the numerical values of the threshold values shown in the above embodiments are shown as examples, and these values can be set to appropriate values as necessary.

(Effects of the Invention) As explained above, according to the present invention, a hanging wall that is lowered to a predetermined height is installed at a ceiling position in the middle of an evacuation route toward an emergency exit, etc., and when the hanging wall is in a lowered state, A fire prevention system is provided with a fire door installed to close an opening passageway of an evacuation route, and a smoke concentration sensor detects the smoke concentration at the location where the fire prevention system is installed, and the detected smoke concentration reaches a predetermined first threshold value. When the smoke concentration reaches the second threshold, which is higher than the first threshold, the fire door is closed, so the hanging wall lowers when the smoke concentration is low. By lowering the hanging wall, the evacuation route is not obstructed, and by lowering the hanging wall, the evacuation route can be secured while suppressing the spread of smoke.

Furthermore, when the smoke concentration rises to a level that is dangerous for use as an evacuation route after the hanging wall has been lowered, the fire door is closed, and in combination with the hanging wall, it forms a partition to prevent the spread of fire and provides an emergency exit. It is possible to prevent smoke from entering the building, etc., and to secure an evacuation route from floors other than the floor where the fire occurred.

In addition, by combining hanging walls and fire doors,
Even if the fire door is located in a wide hallway with a high ceiling, the fire door can be made smaller and the structure can be simplified since there is no need to further provide a child door for evacuation to the fire door.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is an explanatory diagram showing an example of fire protection equipment controlled by the invention, and Figs. 3 and 4 show operating states of the fire protection equipment according to the invention. FIG. 5 is a block diagram showing another embodiment of the present invention. 1a, 1b: smoke concentration sensor, 2, 3, 12: comparator, 4, 5, 14: reference voltage source, 6: hanging wall control section, 7: hanging wall, 8: fire door control section, 9: fire door , 10: Corridor (evacuation route), 11: Ceiling surface.

Claims (1)

[Claims] 1. Fire protection consisting of installing a hanging wall that is lowered to a predetermined height on the ceiling in the middle of the evacuation route toward an emergency exit, etc., and installing a fire door to close the opening passage of the evacuation route when the hanging wall is in the lowered state. a smoke concentration sensor that detects the smoke concentration in the area where the hanging wall and fire door are installed; and driving the hanging wall downward when the detected smoke concentration of the smoke concentration sensor reaches a predetermined first threshold value. and a fire door control means for driving the fire door to close when the smoke concentration detected by the smoke concentration sensor reaches a second threshold value that is larger than the first threshold value. Control device for fire protection equipment.