alarm device

Abstract

To provide a warning device for urging evacuation or the like by detecting bringing-in of gasoline to a building so as to issue abnormality warning.SOLUTION: In a building which includes: a detection sensor 41 installed inside an elevator cage so as to detect gasoline; an elevator control device 34 for controlling elevating / lowering of the elevator cage; and a fire receiver 23 connected to a fire sensor, when the detection sensor detects gasoline inside the elevator cage, the fire receiver receives gasoline detection information so as to issue abnormality warning.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an alarm device that issues an abnormality alarm based on gasoline detection information. [Background technology]

[0002] In recent years, there have been cases of people bringing gasoline into buildings and setting them on fire. Gasoline burns rapidly and intensely after ignition, and the smoke spreads at a tremendous speed, making it difficult for people inside the building to evacuate. As a result, people are unable to escape in time, resulting in significant damage. Furthermore, it is difficult to regulate the sale of gasoline, making it difficult to prevent arsonists from obtaining it. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 5-52330 [Patent Document 2] Patent Publication No. 2021-143980 Summary of the Invention [Problem to be solved by the invention]

[0004] Known examples of gasoline alarms include an alarm device that sounds when gasoline is accidentally poured into a kerosene heater or the like that uses kerosene, as in the invention of Patent Document 1. Also, known flammable gas detectors are those that detect odorous substances such as methane gas, propane gas, and odorants (or odorants), as in Patent Document 2. However, it is believed that no alarm device is known that responds to the intrusion of a gasoline-using arsonist into a building.

[0005] An object of the present invention is to provide an alarm device that detects the bringing of gasoline into a building, issues an alarm, and prompts evacuation, etc. [Means for solving the problem]

[0006] An alarm device according to one embodiment of the present invention is provided in a building with a gasoline detection sensor installed in an elevator car, an elevator control device that controls the elevation of the elevator car, and a fire receiver connected to a fire detector, and when the gasoline detection sensor detects gasoline in the elevator car, the fire receiver receives gasoline detection information and A threshold reduction signal is sent to the fire detector, or a fire threshold in the fire receiver is reduced. It is characterized by: [Effects of the Invention]

[0007] The alarm system allows people in the building to evacuate and minimizes damage caused by gasoline arson. Because the inside of an elevator car is essentially a closed space, the gasoline concentration does not decrease easily and is easy to detect. Furthermore, the inside of the car is a place where arsonists tend to stop, and since they are not moving, the gas concentration does not decrease easily and is easy to detect. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram showing a building according to a first embodiment of the present invention. [Figure 2] 1 is a diagram showing the interior of an elevator car according to a first embodiment of the present invention. [Figure 3] FIG. 1 is a flow diagram of a first embodiment of the present invention. [Figure 4] FIG. 2 is a diagram showing the interior of an elevator car according to a first modified example of the present invention. [Figure 5] FIG. 10 is a diagram showing a building according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION [Example]

[0009] Figure 1 shows a building 1 and its internal configuration related to the alarm device of Example 1. The building 1 is a multi-story building, and its interior has an elevator shaft 12 along with each floor 11. It also has an entrance / exit 13 on the first floor and an elevator machine room 14 on the roof. The building 1 is equipped with a fire alarm system 2. A plurality of fire detectors 21 are installed on each floor 11, and are connected to a fire receiver 23 via sensing wiring 22. In this way, the fire alarm system 2 is composed of the fire detectors 21 installed on each floor, the fire receiver 23 installed in the building's management room or guardhouse, etc., and the sensing wiring 22 connecting the two.

[0010] The elevator system 3 has an elevator car 31 in an elevator shaft 12. A hoist 32 is provided in a machine room 14 above the elevator shaft 12, and the hoist 32 suspends the elevator car 31 in the elevator shaft 12 by a main rope 33. An elevator control device 34 is also provided in the machine room 14 to control the raising and lowering of the elevator car 31 in the elevator shaft 12, and controls the hoist 32. The elevator control device 34 is connected to the elevator car 31 in the elevator shaft 12 by a traveling cable 35. A car door 311 is provided on the elevator car 31, and landing doors 36 are provided on each floor 11.

[0011] A gasoline detection sensor 41 is provided inside the car door 311. The detection sensor 41 detects the presence of gasoline by detecting gasoline gas. Gasoline gas detection can be performed by a detection method using an odor sensor or a combustible gas detector, or by other gas sensors. The detection sensor 41 is connected to the elevator control device 34 via a traveling cable 35, and the elevator control device 34 is connected to the fire receiver 23 via a gasoline detection wiring 42. Furthermore, the fire receiver 23 is connected to an audio generator 44 via an abnormality alarm line 43, and the audio generator 44 is connected to an alarm speaker 46 via an audio wiring 45. The audio generator 44, the audio wiring 45, and the alarm speakers 46 provided on each floor of the building function as alarm devices.

[0012] FIG. 2 shows the state when a person is in elevator car 31 and facing car door 311. A car operation panel 312 is provided to the right of car door 311. A gasoline detection sensor 41 is also provided near the center of car door 311, at about the height of an adult's hand. If an arsonist were to bring gasoline into building 1, it is highly likely that the gasoline would approach the inside of car door 311 at about hand height.

[0013] Next, we will explain what happens when an arsonist brings gasoline into building 1, using Figures 1 to 3. It is believed that an arsonist who enters building 1 through entrance / exit 13 will often use elevator system 3 to get to his / her destination floor 11. When an arsonist carrying gasoline gets into elevator car 31 and car door 311 closes, gasoline gas is detected by detection sensor 41 (step S1). Gasoline detection information is then transmitted to elevator control device 34 via traveling cable 35 (step S2). The elevator control device 34 then sends the detection information to fire receiver 23 via gasoline detection wiring 42 (step S3). Upon receiving the detection information, fire receiver 23 generates an abnormality alarm (step S4), informing a manager in the control room that a predetermined level of gasoline or more has been detected in elevator car 31. Then, fire receiver 23 transmits an abnormality alarm, i.e., an abnormality signal as abnormality information, to audio generator 44 via abnormality alarm line 43 (step S5). Upon receiving the abnormality information, the voice generating device 44 creates voice information saying, "An emergency has occurred. Please evacuate to the building using the stairs." (Step S6), and sends this voice information to the notification speakers 46 on each floor via the voice wiring 45 (Step S7). The notification speakers 46 then issue the above voice information by voice (Step S8). This guides people inside the building 1 to evacuate. Considering that an audio alert about the possibility of arson may encourage an arsonist, in the first embodiment, the word "arson" is not used, and evacuation guidance is given by voice as an arson alarm, so as not to encourage an arsonist.

[0014] Furthermore, the fire receiver 23 that has received the detection information lowers the threshold at which the fire detector 21 determines that a fire has occurred. To do this, it generates a signal to lower the fire determination threshold (step S9). The lowering signal is transmitted to each fire detector 21 via the detection wiring 22 (step S10). The fire detector 21 that has received the lowering signal lowers the threshold at which it determines that a fire has occurred (step S11). As a result, in the event of arson, the fire detector 21 can quickly detect a fire caused by arson using gasoline and issue a fire alarm early.

[0015] Furthermore, upon receiving the detection information, the fire receiver 23 generates a stop signal (step S12) and transmits the stop signal to the elevator control device 34 via the gasoline detection wiring 42 (step S13). Upon receiving the stop signal, the elevator control device 34 moves the elevator car 31 to the set floor and stops it (step S14), displays a malfunction, and keeps the car door 311 and the landing door 36 closed. This traps the arsonist inside the elevator car 31, preventing him from using the stairs or the like to reach the destination floor 11, and makes it easier to apprehend the arsonist. The set floor can be the first floor, where it is easy to apprehend an arsonist, or the top floor, where damage is expected to be minimal if the arsonist sets fire inside the elevator car 31.

[0016] <Variation 1> Next, a first modification in which the mounting position of the detection sensor 41 is changed will be described with reference to Figure 4. Similar to Figure 2, Figure 4 shows the state when a person is in the elevator car 37 and facing the car door 371. In the first modification, the detection sensor 41 is provided at the bottom inside the elevator car 37. The detection sensor 41 is located below the car operating panel 372. Because gasoline gas has a high specific gravity and is heavier than air, providing the detection sensor 41 at the bottom inside the elevator car 37 also makes it easier to detect. [Example]

[0017] In the second embodiment, the sensing wiring 22 of the fire alarm system 2 is used to connect the elevator control device 34 and the fire receiver 23. As shown in FIG. 5, in the second embodiment, the elevator control device 34 is connected to the sensing wiring 22 of the nearest floor. The machine room 14 is often installed on the rooftop, while the fire receiver 23 is installed on a lower floor. In such cases, connecting the elevator control device 34 and the fire receiver 23 with the sensing wiring 22 eliminates the need for a separate, long gasoline detection wiring 42. Because the sensing wiring 22 is generally installed on each floor, it can be extended relatively close to the elevator control device 34 installed on the rooftop, etc. This is particularly advantageous when installing a gasoline alarm system during renovations of an existing building, as it eliminates the need to lay new, long wiring, making installation easier. While FIG. 5 shows a direct connection between the sensing wiring 22 from the fire receiver 23 and the elevator control device 34, the sensing wiring 22 may also be connected to the elevator control device 34 via, for example, a repeater. In this case, the fire receiver 23 periodically sends an inquiry signal to the terminal device on the sensing wiring 22, and when detection information is generated that gasoline has been detected in the elevator car 31, the detection information is transmitted in response to the inquiry signal from the fire receiver 23 via a repeater.

[0018] In the first and second embodiments, the detection information, abnormality information, and stop signals are transmitted and received via wired communication. However, wireless communication is also possible. In particular, when wireless communication is used, the detection information from the gasoline sensor in the elevator car may be received by a fire detector or fire receiver without going through the elevator control device. Furthermore, instead of providing evacuation guidance via audio as in the first embodiment, the arson alarm may be issued via audio notification of an arsonist's intrusion or a warning that a large amount of gasoline has been brought into the building and may cause an arson attack. Furthermore, instead of audio notification via the alarm speaker 46, an alarm device may be used that provides an audible alarm or a visual notification. Furthermore, for notification purposes, abnormality information may be transmitted wirelessly to a registered mobile device, and the mobile device may issue an arson alarm via audio, vibration, display, or the like. In the first embodiment, the fire detector 21 lowered the fire detection threshold upon receiving a lowering signal. However, the accumulation time may be shortened upon receiving an accumulation time lowering signal. In addition, in a fire alarm system called Type R, which determines whether a fire has occurred based on a fire threshold on the fire receiver side, the fire threshold may be lowered within the fire receiver when gasoline detection information is received.

[0019] Although the embodiment shows an elevator using a machine room, the present invention can also be implemented in an elevator without a machine room. Furthermore, the content of the arson alarm may be different depending on whether the elevator car is at a stopping floor where the button on the car control panel is pressed and the car's detection sensor has detected gasoline, or other floors, and the content of the alarm may be different for floors above the stopping floor of the elevator car and floors below the stopping floor. The lowering of the fire judgment threshold and the shortening of the accumulation time may also be different for stopping floors and other floors, and for floors above the stopping floor and floors below the stopping floor.

[0020] Furthermore, the specific configuration is not limited to the embodiments, and the present invention includes design changes within the scope of the gist of the present invention. Furthermore, the above-mentioned embodiments can be combined by utilizing each other's technology as long as there are no particular contradictions or problems in the purpose, configuration, etc. [Explanation of symbols]

[0021] 1 building, 11 floors, 12 elevator shaft, 13 entrance / exit, 14 machine room, 2 Fire alarm equipment, 21 Fire detector, 22 Detector wiring, 23 Fire receiver, 3 Elevator equipment, 31 elevator car, 311 car door, 312 car operation panel, 32 hoisting machine, 33 main rope, 34 elevator control device, 35 traveling cable, 36 landing door, 37 elevator car, 371 car door, 372 car operation panel, 41 detection sensor, 42 gasoline detection wiring, 43 abnormality alarm wire, 44 voice generator, 45 voice wiring, 46 alarm speaker.

Claims

1. a gasoline detection sensor provided in the elevator car; an elevator control device that controls the elevation and lowering of the elevator car; A fire detector and a fire receiver connected to the fire detector are installed in the building. An alarm device characterized in that when the detection sensor detects gasoline inside the elevator car, the fire receiver receives gasoline detection information and sends a threshold reduction signal to the fire detector or reduces the fire threshold within the fire receiver.

2. An alarm device as described in Claim 1, characterized in that the fire receiver issues an abnormality alarm when it receives gasoline detection information.

3. When the fire receiver receives gasoline detection information, it transmits an abnormality alarm to the alarm device, 3. The alarm device according to claim 2, wherein the alarm device issues an arson alarm without using the word "arson" in response to the abnormality alarm.

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