JP5886089B2 - Disaster prevention equipment - Google Patents

Description

  The present invention relates to disaster prevention equipment.

Conventionally, disaster prevention equipment has been installed in buildings. Disaster prevention equipment consists of fire detectors that detect fires, fire receivers that receive fire signals from fire detectors, and display fire locations, smoke prevention and smoke exhaust devices such as fire doors and smoke dampers. It is composed of
In the event of a fire, the staircase in the building becomes an evacuation route. In order to prevent smoke from entering the evacuation route, an open fire door (fire door) is usually provided at the entrance to the staircase on the floor, and a dedicated fire detector for the fire door is provided. When in operation, the fire door is closed by control from the fire receiver.

  If an obstacle such as cardboard is placed in the passage on the side where the fire door closes, the fire door may not close in the event of a fire. Moreover, if there is an obstacle, not only does the fire door not close, but also prevents evacuation in the event of a fire.

  Therefore, in the fire door device described in Patent Document 1, a human detector and an object detector are provided near the fire door, and when the human detector does not operate and the object detector operates, there is a fault before the fire door. As an object exists, an alarm is given on the spot so as to remove the object by a notification device.

JP-A-3-295568

  In the invention described in the prior art document, since a warning is given in a place where there is a fire door, it takes time for the manager of the disaster prevention center to notice that there is an obstacle in front of the fire door. In addition, the size of the obstacle cannot be confirmed. As described above, in the conventional disaster prevention equipment, when evacuating in the event of a fire, there is a problem that the obstacle for preventing the evacuation is not detected as the whole disaster prevention equipment, and the evacuation route is not confirmed.

The present invention provides a disaster prevention facility provided in a building and having a fire detector for detecting a fire and a fire receiver for receiving a fire signal from the fire detector. An obstacle detector for detecting existence is provided, and when the obstacle detector detects an obstacle, an obstacle alarm is given by a fire receiver.
In the above invention, an obstacle detector is provided on the signal line to which the fire detector is connected, and the obstacle detector is provided on the evacuation route and obstructs the operation of the smoke prevention device or evacuation device. When the obstacle detector detects an obstacle, an obstacle signal is sent to the signal line.
Further, in a preferred embodiment of the present invention, a disaster prevention facility is provided in the building, and has a guide indicator light whose display content is controlled by a control signal from the fire receiver, the obstacle detector is When it is detected that there is an obstacle on the evacuation route, it is determined whether the evacuation route is usable, and the determination result is transmitted to the fire receiver. The fire receiver receives the signal from the obstacle detector. A control signal is transmitted to the guide indicator lamps installed around the evacuation route that is determined to be unusable according to the determination result, and the display of the guide indicator light is a display that prompts the user to avoid using the evacuation route. It is characterized by controlling.
Further, in the disaster prevention facility according to a preferred embodiment of the present invention, the detection area of the obstacle detector is divided into a plurality of areas, and the obstacles by the obstacle detectors according to the necessity of obstacle removal in each area The detection mode is set.
Further, in the disaster prevention facility according to a preferred embodiment of the present invention, the detection area of the obstacle detector is divided into a plurality of areas, and the fire is determined according to the necessity of removing the obstacle in the area where the obstacle is detected. A feature of an obstacle alarm by the receiver is set.

  In the present invention, the presence of an obstacle on the evacuation route at the time of a fire is detected by an obstacle detector, and at the time of detection, an obstacle alarm is issued by a fire receiver. It is possible to confirm whether there are any obstacles on the evacuation route and to maintain the evacuation route of the building in an effective state.

In addition, the obstacle detector is provided in a place where not only obstacles on the evacuation route can be detected but also obstacles that prevent normal operation of the smoke prevention device can be detected. The operation can be ensured, so that evacuation can be surely performed.
Since the obstacle detector is provided on the signal line to which the fire detector is connected, the signal line for the obstacle detector is not required, and the wiring installation work is facilitated. Moreover, since the obstacle detector is composed of the monitoring camera and the image processing device, the size of the obstacle placed in front of the fire door can be confirmed on the fire receiver side.
In addition, the fire receiver transmits a control signal to the guidance indicator lamp installed around the evacuation route determined to be unusable by the judgment result from the obstacle detector, and displays the guidance indicator lamp. By controlling so that the display prompts the user to avoid the use of the evacuation route, it is possible to prevent the evacuee from trying to use the evacuation route that cannot be used.
Further, the detection area of the obstacle detector is divided into a plurality of areas, and according to the necessity of obstacle removal in each area, the obstacle detection mode by the obstacle detector is set, When an obstacle is detected in an area where it is necessary to remove the obstacle, the removal of the obstacle can be promoted promptly.
Further, the detection area of the obstacle detector is divided into a plurality of areas, and the manner of obstacle alarm by the fire receiver is set according to the necessity of obstacle removal in the area where the obstacle is detected. Therefore, when an obstacle is detected in an area where it is highly necessary to remove the obstacle, prompt removal of the obstacle can be promoted.

It is a system diagram of the disaster prevention equipment of the present invention. It is drawing which shows the case where a surveillance camera is used as an obstacle detector. It is drawing explaining the difference process of an image processing apparatus. The system diagram which shows the disaster prevention equipment which concerns on the modification 1. FIG. The schematic diagram which shows an example at the time of dividing | segmenting a detection area into a some area | region. 10 is a flowchart showing an example of the operation of an obstacle detector according to Modification 3.

<Embodiment 1>
Hereinafter, the disaster prevention equipment of the present invention will be described with reference to FIG. In FIG. 1, 10 is a fire detector, which is provided in a building and detects a fire in the building. 10C is a fire detector dedicated to the fire door 20 provided in the vicinity of the fire door. Reference numeral 20 denotes a fire door which is an example of a smoke evacuation device, and is provided at an entrance / exit portion of a staircase serving as an evacuation route.
The fire door is normally locked in an open state by a release 21 and is closed when a dedicated fire sensor 10C for the fire door operates. Although not described in detail, the release 21 is provided on a wall surface, and latches a stopper member (not shown) to lock the fire door 20 in the open position. When a control signal is received from the fire receiver 30 during a fire, the built-in solenoid is energized to release the latch of the stopper member and move the fire door 20 to the closed position.

  A fire receiver 30 is connected to the fire detector 10 via a signal line (transmission line) L and receives fire signals from the fire detectors 10 and 10C. An obstacle detector 40 (to be described later) is also connected to the signal line L connecting the fire detector 10 and the fire receiver 30, and the signal line is shared. The fire receiver 30 is connected to the fire door 20 via a control line.

  Since the signal lines of the fire detector 10 and the obstacle detector 40 are shared, the fire receiver 30 can distinguish between the operation of the fire detector 10 and the operation of the obstacle detector 40. For example, in this disaster prevention facility that performs transmission between the receiver 30 and a terminal (for example, the fire detectors 10 and 10C and the obstacle detector 40), the fire detectors 10 and 10C and the relay of the obstacle detector 40 are used. 41 has a unique address. In addition, the fire receiver 30 includes a table in which this address and terminal type information are stored in association with each other. When collecting terminal state information by polling or the like, whether the terminal is the fire detector 10 or not. Whether or not the obstacle detector 40 is present can be identified.

  In the disaster prevention equipment of FIG. 1, each fire detector 10, 10C has a switching circuit, and when the fire detector 10, 10C detects the occurrence of a fire, the switching circuit is short-circuited so that the voltage of the signal line L is normal. It is good also as a facility called P type which notifies fire occurrence to the fire receiver 30 by making it lower. In such a P-type disaster prevention facility, the obstacle detector 40 may also have a switching circuit. In that case, the operation | movement of each terminal can be identified by making the value of the voltage of the signal line L which falls with respect to each operation | movement of the fire detectors 10 and 10C and the obstruction detector 40 differ.

  Next, the configuration of the obstacle detector 40 will be described. The obstacle detector 40 detects the presence of an obstacle that becomes an obstacle to the closing operation of the fire door 20. That is, the obstacle detector 40 is a sensor whose detection area is the rotation range of the fire door 20, and an object that obstructs the closing of the fire door 20 is within the rotation range of the fire door 20. This is detected and a predetermined operation such as generation of an alarm sound and notification to the fire receiver 30 is performed.

  The obstacle detector 40 is provided near the fire detector 10C dedicated to the fire door. The obstacle detector 40 is connected to the same signal line L as the fire detectors 10 and 10C via a repeater 41. As the obstacle detector 40, for example, a distance measuring reflection type sensor is used. The reflection type sensor is a sensor that emits light from a light emitting element toward a detection area and detects whether or not an object exists in the detection area according to a detection state of reflected light.

  Next, the operation during a fire will be described. The fire receiver 30 periodically collects information from terminals such as the fire detector 10 and the obstacle detector 40 via the signal line L. When a fire occurs in the building and the normal fire detector 10 detects the fire, a fire signal is sent to the fire receiver 30. The fire receiver 30 issues a fire alarm with a buzzer or the like and displays that a fire has occurred on the display unit.

  When the fire detector 10C of the fire door 20 whose sensitivity is lower than that of the normal fire detector 10 is operated after the normal fire detector 10 is operated and the fire signal is sent to the fire receiver 30, the fire reception is performed. The machine 30 sends a control signal to the control line. With this control signal, the solenoid of the release 21 is energized, the latch is released, and the fire door 20 is closed.

Next, an operation when an obstacle is placed in the rotation range of the fire door 20 will be described. The obstacle detector 40 monitors the front of the fire door 20 and determines that an obstacle is present when an obstacle such as cardboard is placed in front of the fire door 20 for a predetermined time.
When the obstacle detector 40 detects an obstacle, the obstacle detector 40 sends an obstacle signal to the inquiry from the fire receiver 30 via the repeater 41, and the fire receiver 30 issues an obstacle alarm. Thereby, the administrator of the disaster prevention center where the fire receiver 30 is installed can immediately know that an obstacle has been placed in front of the fire door 20. Moreover, since the obstacle detector 40 sends a signal to the fire receiver 30 using the signal line L to which the fire detector 10 is connected, the signal line can be shared. As an obstacle alarm, an alarm message such as “There is an obstacle in front of the fire door” is output as a voice from a speaker (not shown) or displayed on the display of the fire receiver. You may do it. Moreover, you may display on the display part the floor map which shows the position of the fire door where the obstruction was detected. The warning message output by voice when an obstacle is detected performs a predetermined operation such as the operator of the fire receiver 30 pressing an alarm stop button (not shown) until no obstacle is detected. Up to) may be output repeatedly.

In the above description, the detection of obstacles at the entrance / exit part of the staircase with a fire door has been described as an example of the detection of obstacles in the evacuation route, but the detection of the presence of the obstacle is not limited to the place with the fire door. Any place can be used as an evacuation route in the event of a fire.
For example, in a simple staircase or corridor used for evacuation, an obstacle detector may be provided, or an obstacle detector is provided around a window in the room to provide an obstacle detector detection area. When an obstacle is placed, the obstacle may be detected and an alarm may be given by a fire receiver using a signal line of a fire detector.
As described above, the obstacle detector only needs to be capable of detecting an obstacle that hinders evacuation in the evacuation route.

  In the first embodiment, an obstacle that is an obstacle to the normal operation of a smoke prevention device such as a fire door is detected by an obstacle detector and an alarm is given by a fire receiver. In addition, the obstacle detector may be used to detect obstacles that hinder the operation of evacuation devices (apparatuses) such as rescue bags and slow elevators provided on the veranda.

  As described above, in the above-described embodiment, both the detection of an obstacle that hinders the proper operation of a device (such as a smoke prevention device) constituting the disaster prevention facility and the detection of an obstacle that hinders evacuation during evacuation are performed. Therefore, the operation of the disaster prevention facility at the time of disaster can be ensured and evacuation can be surely performed at the time of disaster.

<Embodiment 2>
In the first embodiment, the case where a reflective sensor is used as the obstacle detector 40 has been described. However, a monitoring camera and an image processing apparatus may be used as the obstacle detector 40.

  When the monitoring camera 50 is used as the obstacle detector 40, the monitoring camera 50 is installed in front of the fire door 20 as shown in FIG. At this time, the monitoring camera 50 is installed so that the entire fire door 20 enters the monitoring field of view of the monitoring camera 50. An example of a monitoring image of the monitoring camera 50 at this time is shown in FIG.

When detecting an obstacle using the monitoring camera 50, the image processing apparatus 51 is connected to the monitoring camera 50, and the obstacle is detected by image processing. There are various methods for detecting obstacles by image processing. For example, obstacle detection is performed by differential processing.
In this case, a normal image (FIG. 3A) in a state where there is no obstacle ahead of the fire door 20 is stored in the first image memory of the image processing device 51 as a background image. Then, the latest image captured periodically is taken into the second image memory, and the background image in the first image memory and the latest image in the second image memory are differentially processed by the difference processing unit.

  FIG. 3B is an example of the latest image, and shows a state in which a plurality of cardboard boxes are placed in front of the fire door 20. FIG. 3C is a drawing of the difference image after the difference processing by the difference processing unit. Only the cardboard which is an obstacle is obtained by performing the difference processing on the images of FIG. 3A and FIG. 3B. Can be extracted from the image. By calculating the area of the area indicating the obstacle extracted by the difference processing and comparing it with a predetermined value, it is possible to detect an obstacle that may become an obstacle when the fire door 20 is closed. That is, when the area of the extracted region indicating the obstacle is larger than a predetermined value, it can be determined that there is an obstacle that can be an obstacle when the fire door 20 is closed. When the image processing apparatus 51 detects an obstacle that may become an obstacle when the fire door 20 is closed, the image processing apparatus 51 transmits an obstacle signal indicating the detection result to the fire receiver 30. In this case as well, when the obstacle is detected, the fire receiver 30 is not notified immediately, but, as in the first embodiment, when the obstacle is detected for a predetermined time, It may be determined that an obstacle has been left, and the fire receiver 30 may be notified.

  The monitoring camera 50 and the image processing device 51 may be connected to the fire receiver 30 through a video line (not shown), or the monitoring camera 50 and the image processing device 51 are used as an obstacle detector. In some cases, as in the first embodiment, the monitoring camera 50 and the image processing device 51, which are obstacle detectors, may be provided on the transmission line to which the fire detector is connected. Further, instead of sending only the detection result indicating that there is an obstacle as a failure signal to the fire receiver 30, the latest image or the difference image may be sent as a still image to the fire receiver 30. By displaying the image received by the fire receiver 30 on the display unit, the manager of the disaster prevention center can see not only the presence of the obstacle but also the size of the obstacle by himself. It becomes easy to cope with. Further, the image processing device 51 is provided in the fire receiver 30, and the presence or absence of an obstacle is determined by the image processing device 51 provided in the fire receiver 30 based on the image transmitted from the monitoring camera 50. Good. In this case, it can be said that a part of the function of the obstacle detector 40 (the function of the image processing device 51) is performed by the fire receiver 30.

<Modification>
The present invention is not limited to the above-described embodiment, and various modifications can be made. Hereinafter, some modifications will be described. Two or more of the following modifications may be used in combination.

(Modification 1)
In the above embodiment, the obstacle left on the evacuation route is detected by the obstacle detector, and the fire receiver 30 issues an alarm. However, the present invention is not limited to this. For example, the obstacle detector determines whether the evacuation route where the obstacle is placed can be used based on the size of the detected obstacle, etc., and based on the determination result, evacuation guidance is performed in the event of a fire. Also good.

  FIG. 4 is a system diagram illustrating the disaster prevention facility according to the first modification that can perform evacuation guidance. In this figure, parts common to those in FIG. The disaster prevention facility shown in FIG. 4 is different from the disaster prevention facility shown in FIG. 1 in that the guidance indicator lamp 60 is connected to the signal line L.

  The guide indicator lamp 60 is a display lamp whose display content is variable, such as a liquid crystal display device. The guidance indicator lamp 60 is provided, for example, in the upper part of the evacuation exit and is normally lit to indicate that the evacuation can be evacuated from the evacuation exit. An “x” or the like is displayed to indicate to the evacuee not to evacuate from the evacuation exit. The display content of the guidance indicator lamp 60 is controlled by a control signal supplied from the fire receiver via the signal line L. The guide indicator lamps 60 are usually installed at a plurality of locations in a facility (building) to be monitored. The fire receiver 30 has a storage unit (not shown) that stores the position of each guidance indicator lamp 60 and the position of the obstacle detector 40 (or an evacuation route monitored by the obstacle detector 40).

In this example, the obstacle detector 40 includes the monitoring camera 50 and the image processing device 51 illustrated in FIG. 2, and the image processing device 51 only detects an obstacle based on the video of the monitoring camera 50. Instead, it is determined whether the evacuation route on which the obstacle is placed can be used from the size of the detected obstacle. When an obstacle is detected, the image processing device 51 notifies the fire receiver 30 of information indicating whether or not the evacuation route can be used in addition to notifying that there is an obstacle. The fire receiver 30 associates identification information for identifying each monitored evacuation route with information indicating whether each evacuation route can be used, and stores the information in a storage device (not shown).
Here, the availability of the evacuation route will be described. Even if the route can be evacuated, if it is not suitable for evacuation, such as when there is an obstacle and it takes a long time to evacuate, it is determined that the route is not used.

  The fire receiver 30 displays “x” indication of the guidance indicator lamp 60 installed around the evacuation route that cannot be used when a fire occurs (that is, when a fire is detected by the fire detector 10 or 10C). For example, a control signal is transmitted to each guidance indicator lamp 60 so as to make a display prompting avoidance of use of the evacuation route so that the evacuation person does not go to the evacuation route or the exit. In addition, the fire detectors 10 and 10C that have detected the occurrence of a fire are identified, and the guidance indicator lamp 60 installed around the fire occurrence place is indicated on each guidance indicator lamp 60 in order to display “x” or the like. Send control signals to keep evacuees away from the fire. In addition, you may make it turn off the lighting state of a guide light instead of "x" display in a guide light.

In this way, when there is an evacuation route that cannot be used because an obstacle is left unattended, the indication of the guidance indicator light 60 installed in the vicinity of the evacuation route should be a display prompting to avoid the use of the evacuation route, such as “×” Thus, it is possible to prevent the evacuees from trying to use an evacuation route that cannot be used.
It should be noted that a human body sensor or the like may be provided on the evacuation route instead of the obstacle detector to detect the congestion state on the evacuation route. An evacuation route that is crowded with evacuees is a route that is not suitable for evacuation. In this case, “x” may be displayed with a guide indicator. In this way, compared with the case where a specific evacuation route is guided by an arrow display of a guidance indicator lamp, the possibility that a person rushes into one evacuation route is reduced.

(Modification 2)
In the above embodiment, the obstacle detector 40 determines the presence or absence of an obstacle in the detection area and notifies the fire receiver 30 when an obstacle is detected. However, the present invention is not limited to this. The detection area may be divided into a plurality of regions, and the manner of detecting an obstacle and the manner of operation when an obstacle is detected may be set according to the region.

  FIG. 5 is a schematic diagram illustrating an example when a detection area (that is, a monitoring image) is divided into a plurality of areas when the monitoring camera 50 is used as the obstacle detector 40. In the example shown in FIG. 5, the monitoring image acquired by the monitoring camera 50 is divided into 32 rectangular areas R11 to R48 arranged in 4 rows × 8 columns.

  The fire door 20 is located in the center of the image. If there are obstacles in the regions R24, R25, R34, R35, R44, and R45 that overlap the fire door 20, the opening and closing operation of the fire door 20 is hindered. Therefore, in these regions R24, R25, R34, R35, R44, and R45, there is a high degree of necessity for obstacle removal, and it is necessary to quickly cope with the obstacle being left. In addition, if an obstacle is left in the areas R23, R26, R33, R36, R43, and R46 adjacent to the fire door 20, the opening and closing of the fire door 20 is not immediately disturbed. May be prevented from evacuating through. In addition, if an obstacle is left in these areas R23, R26, R33, R36, R43, R46, it will cause an obstacle to be placed in the areas R24, R25, R34, R35, R44, R45 that overlap the fire door 20 The likelihood of doing so may increase. Therefore, the areas R23, R26, R33, R36, R43, and R46 adjacent to the fire door 20 are next to the areas R24, R25, R34, R35, R44, and R45 that overlap the fire door 20, and the necessity for removing the obstacles is high. it is conceivable that.

  Therefore, in this example, the higher the necessity of obstacle detection in each region, the shorter the predetermined time value used for determining whether or not an obstacle has been left. That is, a predetermined time set for the regions R24, R25, R34, R35, R44, and R45 overlapping with the fire door 20 is T1, and regions R23, R26, R33, R36, R43 adjacent to the fire door 20 are set. When T2 is a predetermined time set for R46 and T3 is a predetermined time set for the remaining region, T1, T2, and T3 are set such that T1 <T2 <T3. Set. As a result, in areas where it is highly likely that leaving an obstacle will affect the opening and closing of the fire door 20 (that is, areas where there is a high degree of necessity for removing the obstacle), the obstacle is quickly dealt with and removed. On the other hand, frequent obstruction notifications are prevented in areas where it is unlikely that obstructions will affect the opening and closing of the fire door 20.

  Moreover, you may change the mode of operation | movement when an obstruction is detected according to the area | region where the obstruction was detected. In this example, when the obstacle detector 40 notifies the fire receiver 30 that an obstacle has been detected, the obstacle detector 40 sends area information indicating which area the obstacle has been detected to the fire receiver 30, and fire In the receiver 30, the content of the obstacle alarm is changed according to the necessity of obstacle removal in each area. Specifically, when an obstacle is detected in the areas R24, R25, R34, R35, R44, and R45 that overlap with the fire door 20, the fire receiver 30 indicates that an obstacle is placed in front of the fire door. If an obstacle is detected in other areas, an alarm message such as "There are obstacles around the fire door" is output. The message is output by voice and / or display. In addition, the fire receiver 30 may repeatedly output the alarm message by voice when an obstacle is detected, but the repetition interval may be changed according to the area where the obstacle is detected. That is, the repetition interval of the sound output of the alarm message when an obstacle is detected in the regions R24, R25, R34, R35, R44, R45 overlapping the fire door 20 is P1, the regions R23, R26, adjacent to the fire door 20, The repetition interval of the voice output of the alarm message when an obstacle is detected in R33, R36, R43, and R46 is P2, and the repetition interval of the voice output of the alarm message when an obstacle is detected in the remaining region is P3. Then, P1, P2, and P3 may be set so that P1 <P2 <P3. Accordingly, the urgency of removing the obstacle can be notified, and prompt removal of the obstacle is promoted in a region where leaving the obstacle is likely to affect the opening and closing of the fire door 20.

(Modification 3)
In the above embodiment, when the obstacle detector 40 detects an obstacle, it sends an obstacle signal indicating that the obstacle has been detected to the fire receiver 30, and accordingly, the obstacle alarm is issued by the fire receiver 30. However, the present invention is not limited to this. The obstacle detector 40 is provided with a speaker device and a storage device that stores voice data indicating one or more predetermined alarm messages, and an alarm message selected from the speaker device when an obstacle is detected. May be output.

  FIG. 6 is a flowchart illustrating an example of the operation of the obstacle detector 40 according to the third modification. In step S1, the obstacle detector 40 determines whether there is an obstacle in the detection area. For example, when the obstacle detector 40 includes the monitoring camera 50 and the image processing device 51 as in the second modification, the determination as to whether there is an obstacle is detected from the image of the detection area acquired by the monitoring camera 50. The image processing device 51 determines whether or not there is a stationary object not included in the background image in the area. If it is determined that there is a stationary object not included in the background image, it is determined that an obstacle is placed. You can do that. If an obstacle is detected (step S1; YES), the process proceeds to step S2. If an obstacle is not detected (step S1; NO), the process returns to step S1 to repeat the determination of whether there is an obstacle. The period of repeating this determination may be a period longer than a few seconds, for example, a predetermined period such as 60 seconds.

  In step S2, the obstacle detector 40 determines whether there is a person in the detection area. For example, when the obstacle detector 40 is configured by the monitoring camera 50 and the image processing device 51 as in Modification 2, the determination of whether there is a person is within the detection area from the image of the detection area acquired by the monitoring camera 50. The image processing device 51 determines whether there is a moving object. If it is determined that there is a moving object, it may be determined by determining that there is a person. When a person is detected (step S2; YES), the process proceeds to step S3, and an alarm message is output from the speaker device of the obstacle detector 40. At this time, an alarm message issued from the speaker device of the obstacle detector 40 is, for example, to a person in the detection area such as “It is prohibited to place objects around the fire door. The content may be urged not to place an object in the detection area. If no person is detected (step S2; NO), the process proceeds to step S4.

  In step S4, the obstacle detector 40 determines whether the state in which the obstacle is detected continues for a predetermined time. When the state where the obstacle is detected continues for a predetermined time (step S4; YES), the process proceeds to step S5, and the obstacle detector 40 notifies the fire receiver 30 that the obstacle is left unattended. Against. At this time, not only the fire receiver 30 that monitors the inside of the facility but also an external organization such as a fire department in charge may be notified. When the state in which the obstacle is detected does not continue for a predetermined time (step S4; NO), the process returns to step S1.

  Thus, in this example, when it is determined by the obstacle detector 40 that monitors the detection area that there is a person in the detection area and there is an obstacle in the detection area, the obstacle detector 40 Since the alarm message is output from the speaker device, it is possible to effectively prompt the person in the detection area to remove the obstacle. In addition, when the obstacle is detected for a predetermined time, the fire receiver 30 is notified. Appropriate responses such as awareness and removal of obstacles can be taken.

(Modification 4)
In the said embodiment, you may change the aspect of an alarm according to the time when the state in which the obstruction was detected continued. For example, when the time when the state in which the obstacle is detected continues reaches the first predetermined time, the obstacle detector 40 outputs an alarm message from the speaker device, and the state in which the obstacle is detected continues. When the time reaches a second predetermined time that is longer than the first predetermined time, the fire receiver 30 may be notified.

(Modification 5)
In the above embodiment, the fire door that is normally open is detected by the obstacle detector that the fire door operates in a fire and cannot be properly closed by the obstacle, but the present invention is not limited to this.

  There are two types of fire doors, the type that is normally opened and the type that is normally closed, as described in the embodiment. The obstacle detector of the present invention can also detect a fire door of the type normally closed. A fire door of a type that is normally closed may be used by a resident of a building or the like while being always open using a wedge or the like. This method of use is not an appropriate method of use, and a wedge or the like is used, so that it is not closed even in the event of a fire, and smoke will enter the evacuation route.

  Therefore, in order to detect such misuse, the position detector of the fire door is memorized by the obstacle detector by the image processing device, that is, the image of the fire door with the fire door closed is used as the background. It may be stored as an image, a state where the fire door is opened by differential processing, and an alarm may be issued.

  Also, instead of an image processing device, a normally closed fire door is kept open by using a reflection sensor to set the fire door portion as a divided detection area and monitoring the fire door status. It may be possible to detect that it has been set.

DESCRIPTION OF SYMBOLS 10 ... Fire detector, 20 ... Fire door, 30 ... Fire receiver, 40 ... Obstacle detector, 50 ... Surveillance camera, 51 ... Image processing apparatus, 60 ... Guidance indicator lamp

Claims (5)

A fire sensor for detecting a fire, an obstacle detector for detecting the presence of an obstacle on an evacuation route at the time of a fire, a fire signal from the fire sensor and receiving the fire signal In disaster prevention facilities with fire receivers that perform obstacle alarms when obstacle detectors detect obstacles,
The detection area of the obstacle detector is divided into a plurality of areas, and the manner of obstacle detection by the obstacle detector is set according to the necessity of obstacle removal in each area. disaster prevention equipment that. A fire sensor for detecting a fire, an obstacle detector for detecting the presence of an obstacle on an evacuation route at the time of a fire, a fire signal from the fire sensor and receiving the fire signal In disaster prevention facilities with fire receivers that perform obstacle alarms when obstacle detectors detect obstacles,
The detection area of the obstacle detector is divided into a plurality of areas, and the manner of obstacle alarm by the fire receiver is set according to the necessity of obstacle removal in the area where the obstacle is detected. disaster prevention equipment you, characterized in that. The obstacle detector is provided on an evacuation route, detects the presence of an obstacle that hinders the operation of a fire door, smoke evacuation device or evacuation device, and when the obstacle detector detects an obstacle The disaster prevention equipment according to claim 1 or 2 , wherein an obstacle signal is sent to the fire receiver . The obstacle detector is composed of a surveillance camera and an image processing device, and the image processing device stores a normal image in a state where there is no obstacle as a background image, and is periodically imaged. The disaster prevention equipment according to any one of claims 1 to 3, wherein an obstacle is detected by performing differential processing between the latest image to be performed and the background image. Provided in the building, having a guide indicator lamp whose display content is controlled by a control signal from the fire receiver,
When the obstacle detector detects that there is an obstacle on the evacuation route, the obstacle detector determines whether the evacuation route is usable, and transmits the determination result to the fire receiver.
The fire receiver transmits a control signal to the guidance display lamp installed on the periphery of the determined escape route can not be used by the determination result from the obstruction detector, the display of the guidance display lamp wherein The disaster prevention equipment according to any one of claims 1 to 4, wherein the disaster prevention equipment is controlled so as to prompt the user to avoid using the evacuation route.

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