Disaster prevention system

Abstract

To provide a disaster prevention system that enables a call between an emergency telephone master unit side and an emergency telephone slave unit side to be established easily.SOLUTION: A disaster prevention system includes an emergency telephone master unit 4, an emergency telephone slave unit 5 located in a monitored area, which emergency telephone slave unit 5 can talk to the emergency telephone master unit 4, and at least a disaster prevention display unit 3 that, in the event of a fire, displays information indicating a location of the fire on a map showing the monitored area. When a predetermined operation is performed to select a slave symbol image corresponding to the emergency telephone slave unit 5 that is a target of establishing a call with the emergency telephone master unit 4, the disaster prevention display unit 3 performs a process to establish a call between the emergency telephone slave unit 5 corresponding to the slave unit symbol image selected by the predetermined operation and the emergency telephone master unit 4.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a disaster prevention system.

Background Art

[0002] Conventionally, a disaster prevention system including an emergency telephone main unit and a plurality of emergency telephone sub-units for making calls in an emergency such as a fire has been known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the conventional disaster prevention system, when making a call from the emergency telephone main unit side to the emergency telephone sub-unit side, for example, the user checks the installation location of the emergency telephone sub-unit to be called using a paper map or the like, and then inputs information indicating the installation location (for example, information indicating the building, floor, area, and number) to the emergency telephone main unit side to establish the call.

[0005] And in this conventional disaster prevention system, there is room for improvement in terms of more easily establishing a call between the emergency telephone main unit side and the emergency telephone sub-unit side.

[0006] The present invention has been made in view of the above problems, and an object thereof is to provide a disaster prevention system capable of easily establishing a call between the emergency telephone main unit side and the emergency telephone sub-unit side.

Means for Solving the Problems

[0007] In order to solve the above-described problems and achieve the object, the disaster prevention system according to claim 1 includes an emergency telephone master unit and an emergency telephone slave unit disposed in a monitoring area, the emergency telephone slave unit being capable of communicating with the emergency telephone master unit, and at least a display device that displays information indicating the location of a fire that has occurred on a map showing the monitoring area. The display device displays symbol information corresponding to the emergency telephone slave unit at a position on the map corresponding to the position where the emergency telephone slave unit is disposed in the monitoring area, and displays symbol information corresponding to an emergency telephone slave unit whose call has ended after establishing a call with the emergency telephone master unit in a display form distinguishable from symbol information corresponding to other emergency telephone slave units.

[0008] Further, the disaster prevention system according to claim 2 is the disaster prevention system according to claim 1, wherein, after a fire has occurred, symbol information corresponding to an emergency telephone slave unit whose call has ended after establishing a call with the emergency telephone master unit is displayed in a display form distinguishable from symbol information corresponding to other emergency telephone slave units until the fire is restored.

[0009] Further, the disaster prevention system according to claim 3 includes an emergency telephone master unit and an emergency telephone slave unit disposed in a monitoring area, the emergency telephone slave unit being capable of communicating with the emergency telephone master unit, and at least a display device that displays information indicating the location of a fire that has occurred on a map showing the monitoring area. The display device displays symbol information corresponding to the emergency telephone slave unit at a position on the map corresponding to the position where the emergency telephone slave unit is disposed in the monitoring area, and displays symbol information corresponding to an emergency telephone slave unit that has been called from the emergency telephone master unit but for which a call has not been established in a display form distinguishable from symbol information corresponding to other emergency telephone slave units.

[0010] Further, the disaster prevention system according to claim 4 is the disaster prevention system according to claim 3, wherein, after a fire occurs, for symbol information corresponding to a dedicated phone handset that has been called from the dedicated phone main unit but for which a call could not be established, until the fire is restored, it is displayed in a display form distinguishable from symbol information corresponding to other dedicated phone handsets.

[0011] Further, the disaster prevention system according to claim 5 includes a dedicated phone main unit, a dedicated phone handset disposed in a monitoring area and capable of making a call with the dedicated phone main unit, information indicating the location where the fire has occurred when a fire occurs, and symbol information corresponding to the dedicated phone handset at the position where the dedicated phone handset in the monitoring area is disposed, which are displayed on a map, and an operation display unit that displays symbol information corresponding to the dedicated phone handset being called in a display form distinguishable from symbol information corresponding to other dedicated phone handsets. The disaster prevention system is configured such that when a predetermined operation for establishing a call between the dedicated phone main unit and the dedicated phone handset is performed, and the predetermined operation is an operation of selecting the symbol information corresponding to the dedicated phone handset that is the target of establishing a call with the dedicated phone main unit, a call is established between the dedicated phone handset corresponding to the symbol information selected by the predetermined operation and the dedicated phone main unit.

Advantages of the Invention

[0012] According to the disaster prevention systems described in claims 1, 3, and 5, the problems of the present application can be solved.

Brief Description of the Drawings

[0013]

Figure 1

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Figure 12

Embodiments for Carrying Out the Invention

[0014] Hereinafter, embodiments of the disaster prevention system according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited by these embodiments.

[0015] 〔Basic Concepts of the Embodiment〕 First, the basic concepts of this embodiment will be described. This embodiment is generally related to a disaster prevention system.

[0016] A "disaster prevention system" is a system used for disaster prevention, and includes, for example, an emergency phone master device, an emergency phone sub-device, and a display device.

[0017] An "emergency phone master device" is a device for making calls to the emergency phone sub-device side, and is, for example, a device used in an emergency (such as when a disaster such as a fire or an earthquake occurs).

[0018] An "emergency phone sub-device" is a device for making calls to the emergency phone master device side. Specifically, it is an emergency phone sub-device arranged in a monitoring area and capable of making calls to the emergency phone master device, and is, for example, a device used in an emergency.

[0019] The "display device" is at least a device that displays information indicating the location of a fire that has occurred on a map showing the monitoring area. Specifically, it is a device that displays symbol information corresponding to the extension phone on the position on the map corresponding to the position where the extension phone in the monitoring area is arranged. For example, it is a so-called disaster prevention display device.

[0020] The "monitoring area" is an area that is the object to be monitored by the display device. For example, it is a concept that includes an area inside a structure (building, tunnel, etc.), an area outside the structure, etc. The "symbol information corresponding to the extension phone" is a concept that includes, for example, image information indicating the extension phone.

[0021] The "display device" is, for example, a predetermined operation for establishing a call between the main extension phone and the extension phone, and when a predetermined operation of selecting the symbol information corresponding to the extension phone that is the object of establishing a call with the main extension phone is performed, it includes a device or the like that performs a process for establishing a call between the extension phone corresponding to the symbol information selected by the predetermined operation and the main extension phone.

[0022] The "display device" is, for example, a concept that includes means for specifying the state regarding the call between the main extension phone and the extension phone and displaying the symbol information in a display mode corresponding to the specified state.

[0023] The "state related to a call" refers to the various states regarding calls between the main emergency phone and the sub-emergency phone, and specifically, it is a concept that includes any state. In the present embodiment, for example, when the display device receives a predetermined operation from the user (a predetermined operation for instructing preparation for a call), a call instruction is given to the main emergency phone. After that, when the user goes off-hook on the main emergency phone side, a call is established between the main emergency phone side and the sub-emergency phone side, and the call is disconnected when going on-hook on either the main emergency phone side or the sub-emergency phone side. This case will be exemplified and explained. And in this exemplified case, the "state related to a call" may be interpreted as a concept including, for example, a normal state, a call waiting state, and a call state, etc.

[0024] The "normal state" refers to, for example, a state where call preparation and calls are not being made. Specifically, it is a state where the user has not yet performed a predetermined operation for instructing call preparation on the display device side. The "call waiting state" refers to, for example, a state where call preparation is being carried out. Specifically, it is a state where, after the user has performed a predetermined operation for instructing call preparation on the display device side, the main emergency phone side has not yet gone off-hook. The "call state" refers to, for example, a state where a call is being made. Specifically, it is a state where, after the user has performed a predetermined operation for instructing call preparation on the display device side, the main emergency phone side has gone off-hook.

[0025] The "display mode" refers to the appearance of the display, and is a concept that includes, for example, display color, display size, display period (constant display or blinking display, etc.).

[0026] And in the following embodiments, the case where the "monitoring area" is an area inside a building will be described.

[0027] [Specific content of the embodiment] Next, the specific content of the embodiment will be described.

[0028] (Configuration) First, the configuration of the disaster prevention system according to this embodiment will be described. FIG. 1 is a diagram showing a building to which the disaster prevention system according to this embodiment is applied, and FIG. 2 is a plan view of the third floor of the building in FIG. 1.

[0029] The disaster prevention system 100 in FIG. 1 is at least a system for performing disaster prevention related to a fire in the building shown in FIG. 1 and is applied to the building. The building is, for example, a three-story commercial facility. In the third floor part of the building, as shown in FIG. 2, there are three stairways (the first stairway to the third stairway), five living rooms (Room No. 1 to Room No. 5), and three corridors (the first corridor to the third corridor). Note that stairways, living rooms, corridors, etc. are also appropriately provided in the first floor part and the second floor part of the building, but in this embodiment, the description will focus on the third floor part. Note that the installation positions of the disaster prevention receiver 2, the disaster prevention display device 3, and the emergency telephone main unit 4 are arbitrary, but for example, they will be described as being installed adjacent to each other in the living room corresponding to the disaster prevention room in the first floor part of the building in FIG. 1. Also, in FIG. 2, for convenience of explanation, the sensors 1 are illustrated as circles, and a plurality of them are provided, but only the sensors 131 and 132 among these sensors 1 are labeled.

[0030] The disaster prevention system 100 in FIG. 1 includes, for example, sensors 1, a disaster prevention receiver 2, a disaster prevention display device 3, an emergency telephone main unit 4, and emergency telephone sub-units 5. Note that a plurality of the sensors 1 and the emergency telephone sub-units 5 in FIG. 1 are provided on each floor, but in FIG. 1, for convenience of explanation, only one is illustrated on each floor. Also, for the telephone side transmission line L1, the telephone line L2, and the sensor side transmission line L3, for convenience of explanation, each line is illustrated as a single solid line. In the example of FIG. 1, the case where the telephone side transmission line L1 and the sensor side transmission line L3 are separated from each other is illustrated, but the telephone side transmission line L1 and the sensor side transmission line L3 may be configured as a common line.

[0031] (Configuration - Sensors) The detector 1 in FIG. 1 is a device that detects and notifies the occurrence of a fire in the section where it is installed. It is provided in each section on each floor and is also connected to the disaster prevention receiver 2 via the detector-side transmission line L3. For example, as shown in FIG. 2, it includes detectors 131 to 132 provided on the third floor of a building. The specific type and configuration of this detector 1 are arbitrary, but for example, it includes a communication unit, a recording unit, and a control unit (not shown). And in the recording unit of the detector 1, a facility ID for uniquely identifying itself is stored. In particular, it is assumed that "ID131" to "ID131" are stored as the facility IDs in the recording units of detectors 131 to 132. And when the control unit of the detector 1 detects the occurrence of a fire by a known method (for example, a method of detecting based on the smoke density), it generates a fire occurrence signal including the facility ID stored in its own recording unit, and transmits the generated fire occurrence signal to the disaster prevention receiver 2 via the detector-side transmission line L3 to notify the occurrence of a fire.

[0032] (Configuration - Disaster Prevention Receiver) The disaster prevention receiver 2 in FIG. 1 is a device that performs various disaster prevention-related processes when it receives a fire occurrence signal from the detector 1. The specific configuration of this disaster prevention receiver 2 is arbitrary, and a known configuration can be applied, so a detailed description is omitted.

[0033] (Configuration - Disaster Prevention Display Device) FIG. 3 is a block diagram showing the functions of the disaster prevention display device. The disaster prevention display device 3 in FIG. 1 is the aforementioned display device and is communicably connected to various devices of the disaster prevention system 100 (including various devices such as the disaster prevention receiver 2 and the master unit 4 of the emergency phone). The disaster prevention display device 3 includes, for example, a communication unit 31, a display unit 32, an operation unit 33, a recording unit 34, and a control unit 35, as shown in FIG. 3.

[0034] (Configuration - Disaster Prevention Display Device - Communication Unit) The communication unit 31 in FIG. 3 is a communication means for communicating with an external device (that is, each device included in the disaster prevention system 100, including various devices such as the disaster prevention receiver 2 and the main unit 4 of the emergency telephone). The specific type and configuration of this communication unit 31 are arbitrary. For example, it can be configured using a known communication circuit (the same applies to the communication units of other devices unless otherwise specified).

[0035] (Configuration - Disaster Prevention Display Device - Display Unit) The display unit 32 in FIG. 3 is a display means for displaying various information. The specific type and configuration of this display unit 32 are arbitrary. For example, it can be configured using a display such as a known liquid crystal display or an organic EL display.

[0036] (Configuration - Disaster Prevention Display Device - Operation Unit) The operation unit 33 in FIG. 3 is an operation means for inputting various information. The specific type and configuration of this operation unit 33 are arbitrary. For example, it can be configured using known operation buttons or the like. Note that the operation unit 33 may be configured using a touch pad, a keyboard, a mouse, or the like instead of or together with the operation buttons.

[0037] (Configuration - Disaster Prevention Display Device - Recording Unit) The recording unit 34 in FIG. 3 is a recording means for recording programs and various data necessary for the operation of the disaster prevention display device 3, and is configured using, for example, a flash memory or a hard disk. However, instead of or together with the flash memory or the hard disk, any other recording medium including a magnetic recording medium such as a magnetic disk, or an optical recording medium such as a DVD or a Blu-ray disk can be used (the same applies to the recording units of other devices).

[0038] For example, map information, facility information, and sub-unit information are stored in the recording unit 34.

[0039] (Configuration - Disaster Prevention Display Device - Recording Unit - Map Information) The "map information" is information that identifies, for example, a floor plan showing at least the compartments inside the building to which the disaster prevention system 100 is applied as a map, for example, information that identifies the floor plan of each floor as a map, for example, information that identifies a map such as the floor plan shown in FIG. 2. Also, in this embodiment, map information for each floor of the building is stored. That is, map information that identifies a map such as the floor plan of the first floor (hereinafter also referred to as "map information for the first floor"), map information that identifies a map such as the floor plan of the second floor (hereinafter also referred to as "map information for the second floor"), and map information that identifies a map such as the floor plan of the third floor (that is, the floor plan of FIG. 2) (hereinafter also referred to as "map information for the third floor") will be described. And although the specific storage method of such map information is arbitrary, for example, when map information is input to the disaster prevention display device 3 using an arbitrary method (for example, a method of inputting information using a recording medium such as a memory stick, or a method of a manager transmitting and inputting information from his / her own terminal, etc.), the control unit 35 will store the said map information (the same applies to the facility information and the slave unit information described later).

[0040] (Configuration - Disaster Prevention Display Device - Recording Unit - Facility Information) The "facility information" is information that identifies each facility (facility other than the emergency telephone slave unit 5) which is each device included in the disaster prevention system 100. FIG. 4 is a diagram illustrating the facility information. This facility information has, for example, as shown in FIG. 4, information corresponding to the item "facility ID", information corresponding to the item "facility type information", and information corresponding to the item "installation location information" mutually associated with each other.

[0041] The information corresponding to the item "Facility ID" is facility identification information (the identification information is also referred to as "ID") for uniquely identifying each facility. This facility ID is arbitrary. For example, it is assumed that the facility ID is set for Sensor 1 as described above, and this facility ID is recorded. In FIG. 4, for example, "ID131" to "ID132" for uniquely identifying Sensors 131 to 132 in FIG. 2 are stored. The information corresponding to the item "Facility type information" is facility type information for specifying the type of the facility (in FIG. 4, it is "Sensor" for specifying the type of Sensor 1). The information corresponding to the item "Installation location information" is installation location information for specifying the location where each facility is installed (in FIG. 4, it is assumed that information for specifying the floor on which each facility is installed and the location on the map specified by the above map information is stored. For example, it is "3rd floor, the first staircase" for specifying the first staircase on the 3rd floor).

[0042] Regarding the information at the topmost level of such facility information (the combined information of "ID131", "Sensor", and "3rd floor, the first staircase"), it is shown that the type of Sensor 131 (FIG. 2) identified by "Facility ID" = "ID131" is "Sensor" indicated by "Facility type information", and the location where the Sensor 131 is installed is "3rd floor, the first staircase" (that is, the first staircase on the 3rd floor of the building) indicated by "Installation location information".

[0043] (Configuration - Disaster prevention display device - Recording unit - Sub - machine information) "Sub - machine information" is information for specifying the emergency telephone sub - machines included in the disaster prevention system 100. FIG. 5 is a diagram illustrating the sub - machine information. This sub - machine information is, for example, as shown in FIG. 5, the information corresponding to the item "Sub - machine address information" and the information corresponding to the item "Installation location information" are associated with each other.

[0044] The information corresponding to the item "sub-unit address information" is the sub-unit address information that identifies the address set for each emergency phone sub-unit 5 for uniquely identifying the emergency phone sub-unit 5 in communication. This sub-unit address information is arbitrary. For example, it is assumed that the sub-unit address information that identifies the address set for each emergency phone sub-unit 5 is stored in the recording unit 55 (described later) of the corresponding emergency phone sub-unit 5, and that this sub-unit address information is stored. Here, for example, it is assumed that "ADr531" to "Adr533" are stored as sub-unit address information in the recording units 55 of the emergency phone sub-units 531 to 533 in FIG. 2, and that these "ADr531" to "Adr533", etc. are stored as the sub-unit address information in FIG. 5. The information corresponding to the item "installation location information" is the same as the information with the same name in FIG. 2. Specifically, it is the installation location information that identifies the location where the emergency phone sub-unit 5 is installed (in FIG. 5, it is assumed that the information that identifies the floor where the emergency phone sub-unit 5 is installed and the location on the map identified by the above-mentioned map information is stored, for example, "3rd floor, the first staircase" that identifies the first staircase on the 3rd floor).

[0045] For the topmost information of such sub-unit information (the combined information of "Adr531" and "3rd floor, the first staircase"), it is shown that the emergency phone sub-unit 531 with "sub-unit address information" = "Adr531" set is installed at the "3rd floor, the first staircase" (that is, the first staircase on the 3rd floor of the building) indicated by the "installation location information".

[0046] (Configuration - Disaster Prevention Display Device - Control Unit) The control unit 35 in FIG. 3 is also control means for controlling the disaster prevention display device 3. Specifically, it is a computer configured to include a CPU, various programs (including basic control programs such as an OS and application programs that are interpreted and executed on the CPU and realize specific functions on the OS) interpreted and executed on the CPU, and an internal memory such as a RAM for storing programs and various data (the control units of other devices are the same). In particular, the control program according to the embodiment is installed in the disaster prevention display device 3 via an arbitrary recording medium or network, thereby substantially constituting each part of the control unit 35 (the control units of other devices are the same). Note that the processing performed by this control unit 35 will be described later.

[0047] (Configuration - Master unit of emergency phone) FIG. 6 is a block diagram showing the functions of the master unit of the emergency phone. The master unit of the emergency phone 4 in FIG. 1 is communicably connected to various devices (including various devices such as the disaster prevention display device 3) of the disaster prevention system 100, and is also connected to each slave unit of the emergency phone 5 via the telephone side transmission line L1 and the telephone line L2.

[0048] Note that the telephone side transmission line L1 is a line through which various signals for performing various controls such as establishing or disconnecting a call via the telephone line L2 between the master unit of the emergency phone 4 side and the slave unit of the emergency phone 5 side are transmitted. The telephone line L2 is a line for making a call between the master unit of the emergency phone 4 side and the slave unit of the emergency phone 5 side, and is a line through which an audio signal in a predetermined frequency band is transmitted.

[0049] The master unit of the emergency phone 4 includes, for example, as shown in FIG. 6, a communication unit 41, a master side telephone unit 42, a display unit 43, an operation unit 44, an acoustic unit 45, a recording unit 46, and a control unit 47.

[0050] (Configuration - Master unit of emergency phone - Communication unit) The communication unit 41 in FIG. 6 is communication means for performing communication of various signals with the slave unit of the emergency phone 5 via the telephone side transmission line L1.

[0051] (Configuration - Master unit of emergency phone - Master side telephone unit) The parent-side telephone unit 42 in FIG. 6 is a calling means for realizing the function of making a call with the emergency telephone handset 5 side, and is a means for communicating voice signals via the telephone line L2. The configuration of this parent-side telephone unit 42 is arbitrary, and any configuration including a known configuration (for example, the configuration described in Japanese Patent Application Laid-Open No. 2019-129362) can be applied, so only an overview will be described. This parent-side telephone unit 42 can be configured to include, for example, a parent-side telephone 421, a parent-side switch circuit 422, and a parent-side hook switch 423.

[0052] The parent-side telephone 421 is a part held by the user when making a call, and includes, for example, a receiver, a transmitter, and a case for housing the receiver and the transmitter (for example, a known case that can be held by the user and applied from the user's ear to the mouth).

[0053] The parent-side switch circuit 422 is electrically connected between the parent-side telephone 421 and the telephone line L2, and is a switch circuit that electrically connects (that is, "turns on") the parent-side telephone 421 and the telephone line L2 to each other, or electrically disconnects (that is, "turns off") the parent-side telephone 421 and the telephone line L2 from each other.

[0054] The parent-side hook switch 423 is a switch for detecting whether the parent-side telephone 421 is held by a holding part (not shown) of the emergency telephone main unit 4 or removed from the holding part. For example, when the parent-side telephone 421 is removed from the holding part by the user for making a call (i.e., when it is off-hooked), this parent-side hook switch 423 is configured to detect the removal (i.e., detect off-hooking) and then output an off-hook signal (i.e., a signal indicating that the parent-side telephone 421 has been removed from the holding part) to the control unit 47. Also, for example, when the parent-side telephone 421 is returned to and held by the holding part by the user when the call ends (i.e., when it is on-hooked), this parent-side hook switch 423 is configured to detect the return and holding (i.e., detect on-hooking) and then output an on-hook signal (i.e., a signal indicating that the parent-side telephone 421 has been returned to and held by the holding part) to the control unit 47.

[0055] (Configuration - Emergency Telephone Main Unit - Display Unit) The display unit 43 in FIG. 6 is a display means for displaying various information. The specific type and configuration of this display unit 43 are arbitrary, but for example, it can be configured using various display lights that display information by emitting light, or any display (as an example, a 7-segment display, etc.).

[0056] (Configuration - Emergency Telephone Main Unit - Operation Unit) The operation unit 44 in FIG. 6 is an operation means for inputting various information. The specific type and configuration of this operation unit 44 are arbitrary, but for example, it can be configured using known operation buttons, etc.

[0057] (Configuration - Emergency Telephone Main Unit - Acoustic Unit) The acoustic unit 45 in FIG. 6 is an acoustic means for outputting various sound information. The specific type and configuration of this acoustic unit 45 are arbitrary, but for example, it can be configured using known speakers, etc.

[0058] (Configuration - Emergency Telephone Main Unit - Recording Unit) The recording unit 46 in FIG. 6 is a recording means for recording programs and various data necessary for the operation of the emergency telephone master unit 4.

[0059] (Configuration - Emergency Telephone Master Unit - Control Unit) The control unit 47 in FIG. 6 is also a control means for controlling the emergency telephone master unit 4. The processing performed by this control unit 47 will be described later.

[0060] (Configuration - Emergency Telephone Sub - Unit) FIG. 7 is a block diagram showing the functions of the emergency telephone sub - unit. The emergency telephone sub - unit 5 in FIG. 1 is connected to the emergency telephone master unit 4 via, for example, the telephone - side transmission line L1 and the telephone line L2.

[0061] The emergency telephone sub - unit 5 includes, for example, as shown in FIG. 7, a communication unit 51, a sub - side telephone unit 52, a display unit 53, an acoustic unit 54, a recording unit 55, and a control unit 56.

[0062] (Configuration - Emergency Telephone Sub - Unit - Communication Unit) The communication unit 51 in FIG. 7 is a communication means for performing communication of various signals with the emergency telephone master unit 4 via the telephone - side transmission line L1.

[0063] (Configuration - Emergency Telephone Sub - Unit - Sub - Side Telephone Unit) The sub - side telephone unit 52 in FIG. 7 is a call means for realizing the function of making a call with the emergency telephone master unit 4 side, and is a means for performing communication of voice signals via the telephone line L2. The configuration of this sub - side telephone unit 52 is arbitrary, and can be configured in the same manner as the master - side telephone unit 42 in FIG. 6. For example, it can be configured to include a sub - side telephone 521, a sub - side switch circuit 522, and a sub - side hook switch 523.

[0064] The sub - side telephone 521 is the part held by the user when making a call, and can be configured in the same manner as the master - side telephone 421 in FIG. 6, for example.

[0065] The sub - side switch circuit 522 can be configured in the same manner as the parent - side switch circuit 422 in FIG. 6. That is, it is electrically connected between the sub - side telephone 521 and the telephone line L2, and is a switch circuit that electrically connects (i.e., “turns on”) the sub - side telephone 521 and the telephone line L2 to each other, or electrically disconnects (i.e., “turns off”) the sub - side telephone 521 and the telephone line L2 from each other.

[0066] The sub - side hook switch 523 is a switch for detecting whether the sub - side telephone 521 is held by a holding part (not shown) of the emergency telephone handset 5 or removed from the holding part. This sub - side hook switch 523 can be configured in the same manner as the parent - side hook switch 423. That is, for example, when the sub - side telephone 521 is removed from the holding part by the user for making a call (i.e., when off - hook), after detecting the removal (i.e., after detecting off - hook), it is configured to output an off - hook signal (i.e., a signal indicating that the sub - side telephone 521 has been removed from the holding part) to the control unit 56. Also, for example, when the sub - side telephone 521 is returned to and held by the holding part by the user when the call ends (i.e., when on - hook), after detecting the return and holding (i.e., after detecting on - hook), it is configured to output an on - hook signal (i.e., a signal indicating that the sub - side telephone 521 has been returned to and held by the holding part) to the control unit 56.

[0067] (Configuration - Emergency Telephone Handset - Display Unit) The display unit 53 in FIG. 7 is a display means for displaying various information, and can be configured in the same manner as the display unit 43 in FIG. 6, for example.

[0068] (Configuration - Emergency Telephone Handset - Acoustic Unit) The acoustic unit 54 in FIG. 7 is an acoustic means for outputting various sound information, and can be configured in the same manner as the acoustic unit 45 in FIG. 6, for example.

[0069] (Configuration - Emergency Telephone Handset - Recording Unit) The recording unit 55 in FIG. 7 is a recording means for recording programs and various data necessary for the operation of the emergency telephone handset 5. As described above, for example, handset address information is stored in this recording unit 55.

[0070] (Configuration - Emergency Telephone Handset - Control Unit) The control unit 56 in FIG. 7 is also a control means for controlling the emergency telephone handset 5. The processing performed by this control unit 56 will be described later.

[0071] (Processing) Next, the fire location display process and the call process among the disaster prevention processes executed by the disaster prevention system 100 configured as described above will be described.

[0072] (Processing - Fire Location Display Process) First, the fire location display process will be described. FIG. 8 is a flowchart of the fire location display process (in the description of each of the following processes, steps are abbreviated as "S"). The "fire location display process" is generally a process performed by the disaster prevention display device 3. For example, it is a process for displaying information indicating the location of a fire that has occurred on a map showing the monitoring area when a fire occurs. The timing for executing this fire location display process is arbitrary. For example, when the power of each device of the disaster prevention system 100 is turned on, repeated execution is started, and the description will start from when the execution of the fire location display process is started. Here, for example, the case where a fire occurs on the first staircase (the part shown in the upper left of the drawing) on the third floor of the building shown in FIG. 2 will be illustrated and described.

[0073] In the SA1 of FIG. 8, the control unit 35 of the disaster prevention display device 3 determines whether a fire has occurred. Specifically, although it is arbitrary, for example, when the detector 1 detects a fire, a fire occurrence signal including the facility ID for identifying the detector 1 itself is transmitted to the disaster prevention receiver 2 via the detector side transmission line L3. When the disaster prevention receiver 2 receives the fire occurrence signal, it is configured to transmit fire occurrence information (information indicating that a fire has occurred) including the facility ID included in the fire occurrence signal to the disaster prevention display device 3. Then, when the control unit 35 of the disaster prevention display device 3 has not received the fire occurrence information, it determines that no fire has occurred (NO in SA1), and repeatedly executes SA1 until it determines that a fire has occurred. When the fire occurrence information is received, it determines that a fire has occurred (YES in SA1) and proceeds to SA2.

[0074] Note that the processing here may be arbitrarily changed. For example, after the control unit 35 of the disaster prevention display device 3 is configured to directly receive the fire occurrence signal from the detector 1, it may be configured to perform the processing of SA1 based on whether the fire occurrence signal has been received.

[0075] Here, for example, when a fire occurs on the first staircase (the part shown in the upper left of the drawing) on the third floor of the building shown in FIG. 2, the detector 131 detects the fire and then transmits a fire occurrence signal including its own facility ID "ID131" to the disaster prevention receiver 2. When the disaster prevention receiver 2 receives the fire occurrence signal, it transmits fire occurrence information including "ID131" included in the signal to the disaster prevention display device 3. In this case, the control unit 35 of the disaster prevention display device 3 receives the fire occurrence information including "facility ID" = "ID131" and determines that a fire has occurred (YES in SA1).

[0076] In SA2 of FIG. 8, the control unit 35 of the disaster prevention display device 3 identifies the location of the occurred fire (that is, the position where the fire occurred). Specifically, although it is arbitrary, for example, the equipment ID included in the fire occurrence information received by SA1 is acquired, and with reference to the equipment information in FIG. 4, the installation position information associated with the acquired equipment ID is acquired, and the position indicated by the acquired installation position information is identified as the location of the occurred fire.

[0077] Here, for example, the "equipment ID" = "ID131" included in the fire occurrence information received by SA1 is acquired, and with reference to the equipment information in FIG. 5, the "installation position information" = "3rd floor, the first staircase" associated with the aforementioned "equipment ID" = "ID131" is acquired, and the first staircase on the 3rd floor indicated by the acquired "3rd floor, the first staircase" is identified as the location of the occurred fire.

[0078] In SA3 of FIG. 8, the control unit 35 of the disaster prevention display device 3 displays a fire location display screen. FIG. 9 is a diagram illustrating the fire location display screen.

[0079] ===Fire Location Display Screen=== The "fire location display screen" is, for example, a screen that displays the position where the fire occurred, and is, for example, an image including a map image G500, a fire symbol image G501, and sub-unit symbol images G531 to G533. Regarding the sub-unit symbol images G531 to G533, it is desirable to include them in the "fire location display screen", but they may be omitted. The "map image" G500 is an image showing a map such as a floor plan of each floor of a building. The "fire symbol image" G501 is information indicating the location of the occurred fire, and is, for example, a symbol image showing an image of a flame displayed at a position corresponding to the position where the fire occurred. The "sub-unit symbol images" G531 to G533 are information displayed at positions corresponding to the installation positions of the emergency telephone sub-units 5, and are, for example, symbol images showing an image of a telephone.

[0080] ===Processing=== The processing of SA3 in FIG. 8 is optional. For example, first, obtain the map information corresponding to the floor indicated by the location specified in SA2 from among the "1st floor map information" to "3rd floor map information" stored as the map information in the recording unit 34 of FIG. 3. Also, refer to the slave unit information in FIG. 5 to identify the slave unit address information associated with the installation position information corresponding to the floor indicated by the location specified in SA2. Next, generate a map image corresponding to the obtained map information, and superimpose and display a fire symbol image at the position corresponding to the location specified in SA2 on the generated map image. Also, superimpose and display a slave unit symbol image at the position corresponding to the position indicated by the installation position information associated with the identified slave unit address information on the generated map image, thereby generating a fire location display screen and displaying the generated fire location display screen on the display unit 32.

[0081] In this case, for each slave unit symbol image, it shall be superimposed and displayed in a state where the slave unit address information installed at the position where each slave unit symbol image is displayed (that is, the aforementioned identified slave unit address information (FIG. 5)) is associated. Note that the state of associating the slave unit address information means, for example, that when the user clicks and selects a slave unit symbol image using the operation unit 33, the slave unit address information associated with the selected slave unit symbol image is configured to be input into the disaster prevention display device 3.

[0082] Here, for example, first, "3rd floor floor plan information" corresponding to the "3rd floor", which is the floor indicated by the "1st floor staircase on the 3rd floor" that is the location specified by SA2 among the "1st floor floor plan information" to "3rd floor floor plan information" stored as the floor plan information of the recording unit 34 in FIG. 3, is acquired. Also, with reference to the slave unit information in FIG. 5, the "slave unit address information" = "Adr531", "Adr532", and "Adr533" associated with the "installation location information" = "3rd floor, 1st staircase", "3rd floor, 2nd corridor", and "3rd floor, 3rd corridor", which correspond to the "3rd floor" that is the floor indicated by the location specified by SA2, is specified. Next, a map image 500 corresponding to the acquired "3rd floor floor plan information" is generated, and a fire symbol image G501 is superimposed and displayed at the position corresponding to the "1st floor staircase on the 3rd floor", which is the location specified by SA2, on the generated map image 500. Also, slave unit symbol images G531 to G533 are superimposed and displayed at the positions corresponding to the positions indicated by the "installation location information" = "3rd floor, 1st staircase", "3rd floor, 2nd corridor", and "3rd floor, 3rd corridor" associated with the specified slave unit address information on the generated map image 500, thereby generating the fire location display screen in FIG. 9, and the generated fire location display screen is displayed on the display unit 32.

[0083] In this case, the "slave unit address information" = "Adr531" is associated with the slave unit symbol image G531, the "slave unit address information" = "Adr532" is associated with the slave unit symbol image G532, and the "slave unit address information" = "Adr533" is associated with the slave unit symbol image G533. That is, in this case, when the user clicks and selects the slave unit symbol images G531 to G533 using the operation unit 33, the "slave unit address information" = "Adr531", "Adr532", and "Adr533" associated with the clicked slave unit symbol images G531 to G533 are input to the disaster prevention display device 3.

[0084] And by visually recognizing the fire location display screen thus displayed on the display unit 32, it becomes possible to recognize the location where the fire has occurred and take appropriate measures. With this, the fire location display process ends.

[0085] (Process - Call Process) Next, the call process will be described. FIGS. 10 and 11 are flowcharts of the call process. The "call process" is generally a process performed by the disaster prevention display device 3, the emergency telephone main unit 4, and the emergency telephone sub - unit 5. The timing for executing this call process is arbitrary. For example, when call process start information is input to the disaster prevention display device 3 by a user performing a predetermined operation via the operation unit 33 of the disaster prevention display device 3, it is activated, and the explanation will start from when the execution of the call process begins. Note that the "call process start information" is information corresponding to an instruction for starting the call process, and is, for example, information including floor information indicating the floor where the emergency telephone sub - unit 5 to be called with the emergency telephone main unit 4 side is installed.

[0086] Here, for example, the case where the emergency telephone main unit 4 side calls the emergency telephone sub - unit 531 in FIG. 2 and a call is made between these devices will be exemplified and described. That is, the case where the call process is activated when a user on the emergency telephone main unit 4 side inputs call process start information including "floor number information" = "3rd floor" (floor number information indicating the floor where the emergency telephone sub - unit 531 is installed) to the emergency telephone main unit 4 via the operation unit 33 of the disaster prevention display device 3 will be described. Also, at the start of the call process, it is described that the parent - side telephone 421 in FIG. 6 is held (i.e., on - hook) in the holding part (not shown) of the housing of the emergency telephone main unit 4, and similarly, each child - side telephone 521 in FIG. 7 is held (i.e., on - hook) in the holding part (not shown) of the housing of the emergency telephone sub - unit 5. Also, at the start of the call process, it is described that the parent - side switch circuit 422 in FIG. 6 is "off" and the parent - side telephone 421 and the telephone line L2 are electrically disconnected from each other, and the child - side switch circuit 522 in FIG. 7 is also "off" and the child - side telephone 521 and the telephone line L2 are electrically disconnected from each other.

[0087] In SB1 of FIG. 10, the control unit 35 of the disaster prevention display device 3 displays a sub-unit selection screen. FIG. 12 is a diagram illustrating a sub-unit selection image. The "sub-unit selection image" is, for example, an image for selecting a dedicated emergency phone sub-unit 5 that is the target of a call, and includes, for example, a map image G500 and sub-unit symbol images G531 to G533. The processing of SB1 is specifically optional. For example, part of it is the same as the processing of SA3 in FIG. 8. That is, first, among the "1st floor map information" to "3rd floor map information" stored as map information in the recording unit 34 of FIG. 3, the map information corresponding to the floor indicated by the floor information included in the "call processing start information" input at the start of call processing is acquired. Also, with reference to the sub-unit information in FIG. 5, the sub-unit address information associated with the installation position information corresponding to the floor indicated by the aforementioned floor information is specified. Next, a map image corresponding to the acquired map information is generated, and a sub-unit symbol image is superimposed and displayed at a position corresponding to the position indicated by the installation position information associated with the specified sub-unit address information on the generated map image, thereby generating a sub-unit selection image, and the generated sub-unit selection image is displayed on the display unit 32.

[0088] In this case, similar to the previous case, for each sub-unit symbol image, the sub-unit address information installed at the position where each sub-unit symbol image is displayed (that is, the aforementioned specified sub-unit address information (FIG. 5)) is associated and superimposed and displayed. Also, in this case, since the "predetermined operation for instructing preparation for outgoing call" has not been performed yet, the aforementioned "normal state" is specified, and the sub-unit symbol images in the sub-unit selection image are displayed in "cyan" as the display mode corresponding to the "normal state".

[0089] Here, for example, first, among the "1st floor floor plan information" to "3rd floor floor plan information" stored as the map information in the recording unit 34 of FIG. 3, the "floor number information" = "3rd floor" included in the "call processing start information" input at the start of call processing is used to obtain the "3rd floor floor plan information" as the map information corresponding to the 3rd floor indicated. Also, referring to the handset information in FIG. 5, the "handset address information" = "Adr531", "Adr532", and "Adr533" associated with the "installation position information" = "3rd floor, 1st staircase", "3rd floor, 2nd corridor", and "3rd floor, 3rd corridor" corresponding to the 3rd floor indicated by the aforementioned "floor number information" = "3rd floor" is specified. Next, a map image G500 corresponding to the obtained "3rd floor floor plan information" is generated, and handset symbol images G531 to G533 are superimposed and displayed at positions corresponding to the positions indicated by the "installation position information" = "3rd floor, 1st staircase", "3rd floor, 2nd corridor", and "3rd floor, 3rd corridor" associated with the specified handset address information on the generated map image G500, thereby generating the handset selection image in FIG. 12, and the generated handset selection image is displayed on the display unit 32. In this case, the "normal state" is specified, and the handset symbol images G531 to G533 are displayed in "cyan".

[0090] In SB2 of FIG. 10, the control unit 35 of the disaster prevention display device 3 determines whether to instruct call preparation. Specifically, although it is arbitrary, for example, the operation unit 33 is monitored to determine whether a "predetermined operation for instructing call preparation" has been performed, and the determination is made based on the determination result. The "predetermined operation for instructing call preparation" is, for example, a predetermined operation for establishing a call between the emergency telephone master unit 4 and the emergency telephone handset 5. As an example, it is an operation of clicking and selecting the handset symbol image G531 on the handset selection screen in FIG. 12. And when it is determined that the "predetermined operation for instructing call preparation" has not been performed, it is determined not to instruct call preparation (NO in SB2), and SB2 is repeatedly executed until it is determined to instruct call preparation. On the other hand, when it is determined that the "predetermined operation for instructing call preparation" has been performed, it is determined to instruct call preparation (YES in SB2), and the process proceeds to SB3.

[0091] Here, for example, when the user clicks and selects the handset symbol image G531 in FIG. 12 via the operation unit 33, it is determined that a "predetermined operation for instructing call preparation" has been performed, and then it is determined that call preparation is to be instructed (YES for SB2).

[0092] In SB3 of FIG. 10, the control unit 35 of the disaster prevention display device 3 changes the display mode of the handset symbol image in the handset selection image. Specifically, although it is arbitrary, for example, the above-mentioned "call standby state" is specified, and the handset symbol image selected by SB2 in the handset selection image is displayed in "yellow" as the display mode corresponding to the "call standby state".

[0093] Here, for example, the "call standby state" is specified, and the handset symbol image G531 selected by SB2 in the handset selection image is displayed in "yellow". In this case, the handset symbol images G532 to G533 remain in the state of being displayed in "cyan".

[0094] In SB4 of FIG. 10, the control unit 35 of the disaster prevention display device 3 transmits a call preparation signal to the emergency telephone main unit 4. The "call preparation signal" is a signal for instructing preparation for a call, and is, for example, a signal including the sub-unit address information of the emergency telephone sub-unit 5 of the call destination (that is, the emergency telephone sub-unit 5 that is the target to be called and establish a call). Specifically regarding the process of SB3, for example, as described above, the sub-unit symbol image displayed on the sub-unit selection screen is associated with the sub-unit address information. Paying attention to the fact that when the sub-unit symbol image is selected, the sub-unit address information associated with the selected sub-unit symbol image is input, the following process is performed. Specifically, by performing a "predetermined operation for instructing preparation for a call" (an operation of clicking and selecting the sub-unit symbol image), the sub-unit address information input to the disaster prevention display device 3 (the sub-unit address information associated with the clicked sub-unit symbol image) is acquired, a call preparation signal including the acquired sub-unit address information is generated, and the generated call preparation signal is transmitted to the emergency telephone main unit 4. Note that this process of SB4 may be interpreted as corresponding to the process for establishing a call between the emergency telephone sub-unit 5 and the emergency telephone main unit 4.

[0095] Here, for example, in the "predetermined operation for instructing preparation for a call" of SB2, since the sub-unit symbol image G531 in FIG. 12 is selected, the "sub-unit address information" = "Adr531" associated with the sub-unit symbol image G531 is input to the disaster prevention display device 3, and a call preparation signal including this "sub-unit address information" = "Adr531" is generated and transmitted.

[0096] On the other hand, in SC1 of FIG. 10, the control unit 47 of the emergency telephone main unit 4 receives the call preparation signal transmitted in SB4. Here, for example, a call preparation signal including "sub-unit address information" = "Adr531" is received.

[0097] In SC2 of FIG. 10, the control unit 47 of the emergency telephone main unit 4 displays that it has received a call preparation signal. Here, for example, by blinking the display lamp of the display unit 43 or displaying information on a seven-segment display, it is displayed that the call preparation signal has been received and the unit is waiting for a call (that is, waiting for off-hook). In this case, the users around the emergency telephone main unit 4 can recognize that the emergency telephone main unit 4 is waiting for a call by visually checking the display unit 43.

[0098] In SC3 of FIG. 10, the control unit 47 of the emergency telephone main unit 4 determines whether to make a call (that is, determines whether to make a phone call). Specifically, although it is arbitrary, for example, it is determined based on whether the parent-side telephone 421 in FIG. 6 has been removed from the holding unit. And if the parent-side telephone 421 has not been removed from the holding unit (that is, the user has not yet held the parent-side telephone 421) and the parent-side hook switch 423 is not outputting an off-hook signal, it is determined not to make a call (NO in SC3), and SC3 is repeatedly executed until it is determined to make a call. On the other hand, if the parent-side telephone 421 has been removed from the holding unit (that is, the user is holding the parent-side telephone 421) and the parent-side hook switch 423 has output an off-hook signal, it is determined to make a call (YES in SC3), and the process proceeds to SC4.

[0099] Here, for example, when a user around the emergency telephone main unit 4 holds the parent-side telephone 421 to make a call, the parent-side hook switch 423 detects off-hook and then outputs an off-hook signal. In this case, it is determined to make a call (YES in SC3).

[0100] In SC4 of FIG. 10, the control unit 47 of the emergency telephone master unit 4 transmits a call signal to the emergency telephone slave unit 5. The "call signal" is a signal for establishing a call, and for example, it is a signal including the slave unit address information of the emergency telephone slave unit 5 of the call destination (that is, the emergency telephone slave unit 5 to be called to establish a call). Specifically regarding the processing of SC3, for example, the slave unit address information included in the call preparation signal received at SC1 is acquired, a call signal including the acquired slave unit address information is generated, and the generated call signal is transmitted to the emergency telephone slave unit 5 via the telephone-side transmission line L1 (FIG. 1).

[0101] Here, for example, the "slave unit address information" = "Adr531" included in the call preparation signal received at SC1 is acquired, a call signal including the acquired "slave unit address information" = "Adr531" is generated, and the generated call signal is transmitted to the emergency telephone slave unit 5 via the telephone-side transmission line L1. In this case, the call signal will reach all the emergency telephone slave units 5.

[0102] On the other hand, in SD1 of FIG. 10, the control unit 56 of the emergency telephone slave unit 5 receives the call signal transmitted at SC4 via the telephone-side transmission line L1. Here, for example, a call signal including the "slave unit address information" = "Adr531" is received.

[0103] In SD2 of FIG. 10, the control unit 56 of the emergency phone sub-unit 5 determines whether to connect a call. Specifically, although it is arbitrary, for example, it determines based on whether the incoming call signal received at SD1 is an incoming call signal for establishing a call with itself. Then, it acquires the sub-unit address information included in the incoming call signal received at SD1, and mutually compares the acquired sub-unit address information with the sub-unit address information recorded in its own recording unit 55. If the sub-unit address information does not match each other, since the incoming call signal received at SD1 is not an incoming call signal for establishing a call with itself, it is determined not to connect the call (NO in SD2), and SD2 is executed again. On the other hand, if the mutually compared sub-unit address information matches each other, since the incoming call signal received at SD1 is an incoming call signal for establishing a call with itself, it is determined to connect the call (YES in SD2), and the process proceeds to SD3.

[0104] Here, for example, the emergency phone sub-unit 531 in FIG. 2 acquires the "sub-unit address information" = "Adr531" included in the incoming call signal received at SD1, and mutually compares the acquired "sub-unit address information" = "Adr531" with the "sub-unit address information" = "Adr531" recorded in its own recording unit 55. Since the sub-unit address information matches each other, since the incoming call signal received at SD1 is an incoming call signal for establishing a call with itself, it is determined to connect the call (YES in SD2). On the other hand, for example, the emergency phone sub-units 532 to 533 in FIG. 2 and the emergency phone sub-units 5 on the first and second floors are determined not to connect the call (NO in SD2).

[0105] In SD3 of FIG. 10, the control unit 56 of the emergency phone sub-unit 5 transmits a response signal to the emergency phone main unit 4 via the phone-side transmission line L1 (FIG. 1). The "response signal" is a signal for notifying the emergency phone main unit 4 side that it has received an incoming call signal for establishing a call with itself. Here, for example, the emergency phone sub-unit 531 in FIG. 2 transmits a response signal.

[0106] In SD4 of FIG. 10, the control unit 56 of the emergency telephone sub-unit 5 establishes a call. Specifically, although it is arbitrary, for example, by turning on the child-side switch circuit 522 in FIG. 7, the child-side telephone 521 and the telephone line L2 are electrically connected to each other. Here, for example, the emergency telephone sub-unit 531 in FIG. 2 electrically connects its own child-side telephone 521 and the telephone line L2 to each other by turning on its own child-side switch circuit 522.

[0107] On the other hand, in SC5 of FIG. 10, the control unit 47 of the emergency telephone main unit 4 receives the response signal transmitted in SD3 via the telephone-side transmission line L1. Here, for example, it receives the response signal transmitted from the child-side telephone 521.

[0108] In SC6 of FIG. 10, the control unit 47 of the emergency telephone main unit 4 establishes a call. Specifically, it is arbitrary and the same as SD4. For example, by turning on the parent-side switch circuit 422 in FIG. 6, the parent-side telephone 421 and the telephone line L2 are electrically connected to each other. In this case, in the aforementioned SD4, the child-side telephone 521 of the emergency telephone sub-unit 531 in FIG. 2 is connected to the telephone line L2, and the parent-side telephone 421 of the emergency telephone main unit 4 is connected to the telephone line L2. Therefore, the emergency telephone main unit 4 and the emergency telephone sub-unit 531 are connected to each other via the telephone line L2, and a call between the emergency telephone main unit 4 and the emergency telephone sub-unit 531 is established. That is, the user on the emergency telephone main unit 4 side and the user on the emergency telephone sub-unit 531 side can communicate with each other using the emergency telephone main unit 4 and the emergency telephone sub-unit 531.

[0109] In SC7 of FIG. 10, the control unit 47 of the emergency telephone main unit 4 transmits an establishment notification signal to the disaster prevention display device 3. The "establishment notification signal" is a signal for notifying the disaster prevention display device 3 side that a call has been established.

[0110] On the other hand, in SB5 of FIG. 11, the control unit 35 of the disaster prevention display device 3 receives the establishment notification signal transmitted in SC7.

[0111] In SB6 of FIG. 11, the control unit 35 of the disaster prevention display device 3 changes the display mode of the sub-device symbol image in the sub-device selection image. Specifically, although it is arbitrary, for example, the above-mentioned "call state" is specified, and the sub-device symbol image selected by SB2 in the sub-device selection image is displayed in "green" as the display mode corresponding to the "call state". Here, for example, the "call state" is specified, and the sub-device symbol image G531 selected by SB2 in the sub-device selection image is displayed in "green".

[0112] On the other hand, in SC8 of FIG. 11, the control unit 47 of the emergency telephone master unit 4 determines whether to disconnect the call. Specifically, although it is arbitrary, for example, it is determined based on whether the master telephone 421 in FIG. 6 has been returned to the holding unit and held. And when the master telephone 421 has not been returned to the holding unit and held (that is, the user still holds the master telephone 421) and the master hook switch 423 is not outputting an on-hook signal, it is determined that the call is not disconnected (NO in SC8), and SC8 is executed again. On the other hand, when the master telephone 421 has been returned to the holding unit and held (that is, the user has returned the master telephone 421 to the holding unit) and the master hook switch 423 has output an on-hook signal, it is determined that the call is to be disconnected (YES in SC8), and the process proceeds to SC9.

[0113] Here, for example, when the user who was on the phone on the emergency telephone master unit 4 side returns the master telephone 421 to the holding unit of the emergency telephone master unit 4 to cut off the call, the master hook switch 423 detects on-hook and then outputs an on-hook signal. In this case, it is determined that the call is to be disconnected (YES in SC8).

[0114] In the SC9 of FIG. 11, the control unit 47 of the emergency telephone master unit 4 performs a process of disconnecting a call. Specifically, although it is arbitrary, for example, by turning off the master side switch circuit 422 in FIG. 6, the master side telephone 421 and the telephone line L2 are electrically disconnected from each other. Further, a disconnection notification signal is transmitted to the disaster prevention display device 3. The "disconnection notification signal" is a signal for notifying the disaster prevention display device 3 side that the call has been disconnected. Also, although not shown, a process is performed to electrically disconnect the slave side telephone 521 and the telephone line L2 from each other in the emergency telephone slave unit 5 that was the call target. Regarding this process in detail, a slave side disconnection signal (a signal for electrically disconnecting the slave side telephone 521 and the telephone line L2 from each other) is transmitted to the emergency telephone slave unit 5 via the telephone side transmission line L1. On the other hand, the control unit 56 of the emergency telephone slave unit 5 that has received the slave side disconnection signal turns off the slave side switch circuit 522 in FIG. 7 to electrically disconnect the slave side telephone 521 and the telephone line L2 from each other.

[0115] Here, for example, by turning off the master side switch circuit 422 in FIG. 6, the master side telephone 421 and the telephone line L2 are electrically disconnected from each other, a disconnection notification signal is transmitted to the disaster prevention display device 3, and a slave side disconnection signal is transmitted to the emergency telephone slave unit 5. On the other hand, the emergency telephone slave unit 531 that has received the slave side disconnection signal turns off its own slave side switch circuit 522 to electrically disconnect the slave side telephone 521 and the telephone line L2 from each other. On the other hand, for the emergency telephone slave units 532 to 533 in FIG. 2 and the emergency telephone slave units 5 on the first and second floors, since their own slave side switch circuits 522 are not turned on and remain turned off, it may be considered that no control is performed.

[0116] On one hand, in SD5 of FIG. 11, the control unit 56 of the emergency phone sub-device 5 determines whether to disconnect the call. Specifically, it is arbitrary and similar to SC8. For example, it determines based on whether the sub-phone 521 in FIG. 7 has been returned to and held by the holding unit. If the sub-phone 521 has not been returned to and held by the holding unit (that is, the user still holds the sub-phone 521) and the sub-hook switch 523 is not outputting an off-hook signal, it is determined not to disconnect the call (NO in SD5), and SD5 is executed again. On the other hand, if the sub-phone 521 has been returned to and held by the holding unit (that is, the user has returned the sub-phone 521 to the holding unit) and the sub-hook switch 523 outputs an off-hook signal, it is determined to disconnect the call (YES in SD5), and the process proceeds to SD6.

[0117] Here, for example, when the user who was on a call on the emergency phone sub-device 5 side returns the sub-phone 521 to the holding unit of the emergency phone sub-device 5 to cut off the call, the sub-hook switch 523 detects off-hook and then outputs an off-hook signal. In this case, it is determined to disconnect the call (YES in SD5).

[0118] On one hand, in SD6 of FIG. 11, the control unit 56 of the emergency phone sub-device 5 performs a process of disconnecting the call. Specifically, it is arbitrary and similar to SC9. For example, by turning off the sub-switch circuit 522 in FIG. 7, the sub-phone 521 and the phone line L2 are electrically disconnected from each other. Also, although not shown in the figure, a process is performed to electrically disconnect the parent phone 421 and the phone line L2 in the emergency phone main device 4 that was the call target from each other. For details of this process, a parent-side disconnection signal (a signal for electrically disconnecting the parent phone 421 and the phone line L2 from each other) is transmitted to the emergency phone main device 4 via the phone-side transmission line L1. On the other hand, the control unit 47 of the emergency phone main device 4 that has received the parent-side disconnection signal turns off the parent-side switch circuit 422 in FIG. 6 to electrically disconnect the parent phone 421 and the phone line L2 from each other. Also, in this case, the control unit 47 of the emergency phone main device 4 transmits a disconnection notification signal to the disaster prevention display device 3 in the same manner as in the case of SC9.

[0119] Here, for example, the normal telephone handset 531 electrically disconnects the handset telephone 521 and the telephone line L2 from each other by turning off the handset side switch circuit 522 in FIG. 7, and also transmits a parent cut-off signal to the emergency telephone main unit 4. On the other hand, the emergency telephone main unit 4 that has received the cut-off signal electrically disconnects the parent side telephone 421 and the telephone line L2 from each other by turning off its own parent side switch circuit 422, and in this case, transmits a disconnection notification signal to the disaster prevention display device 3.

[0120] On the other hand, in SB7 of FIG. 11, the control unit 35 of the disaster prevention display device 3 receives the disconnection notification signal transmitted by SC9 or SD6.

[0121] In SB8 of FIG. 11, the control unit 35 of the disaster prevention display device 3 changes the display mode of the handset symbol image in the handset selection image. Specifically, although it is arbitrary, for example, the above-mentioned "normal state" is specified, and the handset symbol image selected by SB2 in the handset selection image is displayed in "cyan" as the display mode corresponding to the "normal state". Here, for example, the "normal state" is specified, and the handset symbol image G531 selected by SB2 in the handset selection image is displayed in "cyan". That is, in this case, the handset symbol images G531 to G533 are all displayed in "cyan". Thus, the call process is terminated.

[0122] (Effects of the Embodiment) As described above, according to this embodiment, by displaying the handset symbol image (symbol information) corresponding to the emergency telephone handset 5, for example, without checking the installation position of the emergency telephone handset using a paper map, the installation position of the emergency telephone handset can be grasped, so that a call between the emergency telephone main unit 4 side and the emergency telephone handset 5 side can be easily established.

[0123] In addition, by the disaster prevention display device 3 (display device) performing a process for establishing a call between the cordless phone handset 5 and the cordless phone base unit 4 corresponding to the handset symbol image selected by a predetermined operation, for example, without inputting information indicating the building, floor, area, and number as information indicating the installation position of the cordless phone handset 5 that is the target of the call with respect to the cordless phone base unit 4, a call can be established, so it becomes possible to easily establish a call between the cordless phone base unit 4 side and the cordless phone handset 5 side.

[0124] In addition, by displaying the handset symbol image in a display mode corresponding to the state regarding the call, for example, it becomes possible to recognize the state regarding the call by visually recognizing the handset symbol image.

[0125] [Modifications to the Embodiment] As described above, the embodiments according to the present invention have been described. However, the specific configurations and means of the present invention can be arbitrarily modified and improved within the scope of the technical idea of each invention described in the claims. Hereinafter, such modifications will be described.

[0126] [Regarding the problems to be solved and the effects of the invention] First, the problems to be solved by the invention and the effects of the invention are not limited to the above-described content, and may vary depending on the implementation environment and details of the configuration of the invention. There may be cases where only some of the above-described problems are solved or only some of the above-described effects are achieved.

[0127] [Regarding dispersion and integration] In addition, the above-described configuration is a functional concept, and it is not necessarily physically configured as illustrated. That is, the specific form of dispersion and integration of each part is not limited to that illustrated, and all or part of it can be configured by functionally or physically dispersing or integrating it in any unit.

[0128] [Regarding the selection of the handset symbol image] In the above-described embodiment, the case where the slave unit symbol image is selected on the slave unit selection screen of FIG. 12 has been described, but the present invention is not limited to this. For example, on the fire location display screen of FIG. 9, the slave unit symbol image may be configured to be selectable. That is, when the slave unit symbol image displayed on the fire location display screen of FIG. 9 is clicked and selected via the operation unit 33, it may be configured to determine that a call preparation instruction is given at SB2 in FIG. 10 (YES of SB2).

[0129] (Regarding other features) In addition to the above-described embodiment, on the fire location display screen of FIG. 9 and the slave unit selection screen of FIG. 12, the slave unit symbol image corresponding to the emergency telephone slave unit related to the fire alarm may be displayed in a display mode distinguishable from other slave unit symbol images. For example, the sensor and the emergency telephone slave unit may be set in a related relationship in advance to identify the emergency telephone slave unit related to the fire alarm based on the sensor that has issued a fire alarm. Further, without setting a related relationship in advance between the sensor and the emergency telephone slave unit, the emergency telephone slave unit corresponding to the emergency telephone slave unit symbol within a predetermined range from the fire symbol image 501 in the fire location display screen may be identified as the emergency telephone slave unit related to the fire alarm. For example, the slave unit symbol image corresponding to the emergency telephone slave unit related to the fire alarm may blink. By doing so, it is possible to assist the user of the disaster prevention display device 3 in making a call to the emergency telephone slave unit near the sensor that has issued a fire alarm.

[0130] Also, the display form of the slave unit symbol image may be changed based on the record of establishing a call between the emergency telephone slave unit and the emergency telephone master unit from the fire alarm until the fire recovery based on the fire alarm is performed. For example, regarding the handset symbol image corresponding to a handset of an emergency phone for which a call has ended after establishing a call with the emergency phone master unit, a display form distinguishable from other emergency phone handset symbols may be adopted, for example, by superimposing a round image. Also, regarding the handset symbol image corresponding to a handset of an emergency phone that has been called from the emergency phone master unit but for which a call has not been established, a display form distinguishable from other emergency phone handset symbols may be adopted, for example, by superimposing an "x" image. By doing so, it becomes possible to assist the user of the disaster prevention display device 3 when selecting an emergency phone handset when wishing to make a call again after the call with the emergency phone handset has ended, or to assist in avoiding calling the same emergency phone handset repeatedly when sequentially making calls to the emergency phone handset until a call is established.

[0131] (Emergency phone handset) Also, in the above embodiment, the case of making a call from the emergency phone master unit 4 side has been described, but the configuration may be such that a call is made from the emergency phone handset 5 side to the emergency phone master unit 4. In such a configuration, the disaster prevention display device 3 specifies the floor where the calling emergency phone handset 5 is installed, and in the map image corresponding to the specified floor, the handset symbol image is displayed at the position corresponding to the installation position of the emergency phone handset 5 installed on the floor where the calling emergency phone handset 5 is installed. In this case, the handset symbol image corresponding to the calling emergency phone handset 5 may be displayed in a blinking manner to make it prominent.

[0132] (Others) Various other functions may be implemented. For example, incoming calls, outgoing calls, and disconnections may be recorded in a history, and redialing may be configured to be possible by selecting from the history. Also, for example, a plurality of disaster prevention display devices may be network-connected, all of which are equipped with a handset, and configured such that call voices can be transferred between the disaster prevention display devices so that incoming calls, outgoing calls, and disconnection operations can be performed in the same way on all disaster prevention display devices. Also, for example, after being configured to display symbols such as sensors, when the symbol is clicked, the nearby emergency telephone sub-unit may be configured to be highlighted (such as flashing). Also, for example, the disaster prevention display device and the handset of the emergency telephone main unit may be integrally configured. Note that it may also be integrally configured with the emergency telephone main unit itself. Also, when the disaster prevention display device and the emergency telephone main unit are installed in separate locations such as separate buildings, a configuration may be adopted in which a communication line is extended and a handset is installed near the disaster prevention display device.

[0133] (Regarding features) Also, the features of the above-described embodiments and the features of the modification examples may be arbitrarily combined.

[0134] (Supplementary note) The disaster prevention system of Supplementary Note 1 includes an emergency telephone main unit and an emergency telephone sub-unit arranged in a monitoring area, the emergency telephone sub-unit being capable of communicating with the emergency telephone main unit, and at least a display device that displays information indicating the location where a fire has occurred on a map showing the monitoring area. The display device displays symbol information corresponding to the emergency telephone sub-unit at a position on the map corresponding to the position where the emergency telephone sub-unit in the monitoring area is arranged.

[0135] The disaster prevention system of Supplementary Note 2 is the disaster prevention system according to Supplementary Note 1, wherein when a predetermined operation for establishing a call between the emergency telephone main unit and the emergency telephone sub-unit, which is a predetermined operation of selecting the symbol information corresponding to the emergency telephone sub-unit that is the target of establishing a call with the emergency telephone main unit, is performed, a process for establishing a call between the emergency telephone sub-unit corresponding to the symbol information selected by the predetermined operation and the emergency telephone main unit is performed.

[0136] In the disaster prevention system of Supplementary Note 3, in the disaster prevention system described in Supplementary Note 1 or 2, the display device specifies the state regarding the call between the emergency telephone main unit and the emergency telephone sub-unit, and displays the symbol information in a display mode corresponding to the specified state.

[0137] (Effect of Supplementary Note) According to the disaster prevention system described in Supplementary Note 1, by displaying the symbol information corresponding to the emergency telephone sub-unit, for example, the installation position of the emergency telephone sub-unit can be grasped without checking the installation position of the emergency telephone sub-unit using a paper map, so that a call between the emergency telephone main unit side and the emergency telephone sub-unit side can be easily established.

[0138] According to the disaster prevention system described in Supplementary Note 2, by the display device performing a process for establishing a call between the emergency telephone sub-unit corresponding to the symbol information selected by a predetermined operation and the emergency telephone main unit, for example, the user does not need to input information indicating the building, floor, area, and number as information indicating the installation position of the emergency telephone sub-unit to be the call target for the emergency telephone main unit, and the call can be established, so that a call between the emergency telephone main unit side and the emergency telephone sub-unit side can be easily established.

[0139] According to the disaster prevention system described in Supplementary Note 3, by displaying the symbol information in a display mode corresponding to the state regarding the call, for example, the state regarding the call can be recognized by visually recognizing the symbol information.

Explanation of Reference Signs

[0140] 1 Sensor 2 Disaster prevention receiver 3 Disaster prevention display device 4 Emergency telephone main unit 5 Emergency telephone sub-unit 31 Communication unit 32 Display unit 33 Operation unit 34 Recording unit 35 Control unit 41 Communication unit 42 Main unit side telephone unit 43 Display unit 44 Operation unit 45 Audio unit 46 Recording unit 47 Control unit 51 Communication unit 52 Sub - side telephone unit 53 Display unit 54 Audio unit 55 Recording unit 56 Control unit 100 Disaster prevention system 131 Sensor 132 Sensor 421 Parent - side telephone 422 Parent - side switch circuit 423 Parent - side hook switch 521 Sub - side telephone 522 Sub - side switch circuit 523 Sub - side hook switch 531 Emergency telephone handset 532 Emergency telephone handset 533 Emergency telephone handset G531 Handset symbol image G532 Handset symbol image G533 Handset symbol image G500 Map image G501 Fire symbol image L1 Telephone - side transmission line L2 Telephone line L3 Sensor - side transmission line

Claims

1. Emergency telephone base station, an emergency telephone handset arranged in a monitoring area, the emergency telephone handset being capable of communicating with the emergency telephone base unit; a display device that displays, when a fire occurs, information indicating the location of the fire on a map indicating the monitoring area; Equipped with the display device displays symbol information corresponding to the emergency telephone handset at a position on the map corresponding to a position in the monitoring area where the emergency telephone handset is located; Regarding symbol information corresponding to an emergency telephone handset that has established a call with the emergency telephone base unit and then terminated the call, Display in a format that can be distinguished from the symbol information corresponding to other emergency telephone handsets A disaster prevention system comprising:

2. After the fire broke out, Regarding symbol information corresponding to an emergency telephone handset that has established a call with the emergency telephone base unit and then terminated the call, Until the fire is resolved, the symbol information will be displayed in a format that can be distinguished from that of other emergency telephone handsets.

2. The disaster prevention system according to claim 1.

3. Emergency telephone base station, an emergency telephone handset arranged in a monitoring area, the emergency telephone handset being capable of communicating with the emergency telephone base unit; a display device that displays, when a fire occurs, information indicating the location of the fire on a map indicating the monitoring area; Equipped with the display device displays symbol information corresponding to the emergency telephone handset at a position on the map corresponding to a position in the monitoring area where the emergency telephone handset is located; Regarding the symbol information corresponding to the emergency telephone handset that was called from the emergency telephone base unit but the call was not established, Display in a format that can be distinguished from the symbol information corresponding to other emergency telephone handsets A disaster prevention system comprising:

4. After the fire broke out, Regarding symbol information corresponding to an emergency telephone handset that was called from the emergency telephone base unit but to which a call was not established, Until the fire is resolved, the symbol information will be displayed in a format that can be distinguished from that of other emergency telephone handsets.

4. The disaster prevention system according to claim 3.

5. Emergency telephone base station, an emergency telephone handset arranged in a monitoring area, the emergency telephone handset being capable of communicating with the emergency telephone base unit; In the event of a fire, information indicating the location of the fire; symbol information corresponding to the emergency telephone handset at a position where the emergency telephone handset is located in the monitoring area; Display on the map, an operation display unit that displays symbol information corresponding to the calling emergency telephone handset in a display form that can be distinguished from symbol information corresponding to other emergency telephone handset; A disaster prevention system comprising: With respect to the operation display unit, A predetermined operation for establishing a call between the emergency telephone base unit and the emergency telephone handset, When the predetermined operation is performed to select the symbol information corresponding to the emergency telephone handset that is to be connected to the emergency telephone base unit, establishing a call between the emergency telephone handset corresponding to the symbol information selected by the predetermined operation and the emergency telephone base unit; Disaster prevention system.

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