Fire alarm system

Abstract

To provide a fire alarm system that can reduce an area for installation of fire receivers and emergency telephone devices.SOLUTION: A fire alarm system 1 includes: a fire receiver 10 connected to a fire detector 2 via a transmission line 5 and having a telephone master unit 14 for emergency telephones; and a telephone repeater 40 connected to the fire receiver 10 via a first telephone line 7 and the transmission line 5, and connected to a telephone slave unit 4 via a second telephone line 9. The telephone repeater 40 includes: a first telephone circuit 45 connected to the first telephone line 7; a second telephone circuit 51 connected to the second telephone line 9; and a call line switching circuit 50 connecting the second telephone circuit 51 to the first telephone circuit 45 when a call is received from the telephone slave unit 4.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a fire alarm system in which a call is made between an emergency telephone master unit and a telephone handset. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there is an emergency telephone device that has a telephone base unit and is capable of communicating between the telephone base unit and telephone handsets for emergency calls that are installed separately (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 5-20585 Summary of the Invention [Problem to be solved by the invention]

[0004] The emergency telephone device described in Patent Document 1 is installed near the fire receiver as a separate device from the fire receiver. Therefore, in order to install the fire receiver and the emergency telephone device, a space is required to install these two devices. For this reason, depending on the size of the room in which the fire receiver is installed, it may be necessary to abandon the installation of the emergency telephone device. Although it is possible to install the emergency telephone device in a room separate from the fire receiver, it becomes difficult for one person to operate the fire receiver and the emergency telephone device.

[0005] The present invention has been made in view of the above-mentioned problems, and provides a fire alarm system capable of reducing the area required for installing a fire receiver and an emergency telephone device. [Means for solving the problem]

[0006] The fire alarm system of the present invention comprises a fire receiver connected to a fire detector via a transmission line and having an emergency telephone master unit, and a telephone repeater connected to the fire receiver via a first telephone line and the transmission line and connected to a telephone handset by a second telephone line, the telephone repeater comprising a first telephone circuit connected to the first telephone line, a second telephone circuit connected to the second telephone line, and a call line switching circuit which connects the second telephone circuit to the first telephone circuit when an incoming call is received from the telephone handset. The fire alarm system of the present invention comprises a fire receiver connected to a fire detector via a transmission line and having an emergency telephone master unit, and a telephone repeater connected to the fire receiver via a first telephone line and the transmission line and connected to a telephone handset by a second telephone line, the telephone repeater having a call line switching circuit that connects the second telephone line to the first telephone line when an incoming call is received from the telephone handset. The fire alarm system of the present invention comprises a fire receiver having a telephone base unit for an emergency telephone, and a telephone repeater to which a telephone handset is connected, the fire receiver and the telephone repeater being connected via a telephone line, and when an incoming call is received from the telephone handset, the telephone repeater transmits information identifying the telephone handset that has received the incoming call to the fire receiver, and the telephone repeater is equipped with a break detection circuit that detects a break in the telephone line. Effect of the Invention

[0007] According to the present invention, it is not necessary to install an emergency telephone device separately from a fire control device, and therefore it is possible to install a device having the functions of a fire control device and an emergency telephone device in a smaller installation area than in the past. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram illustrating a configuration of a fire alarm system 1 according to a first embodiment. [Diagram 2] 1 is a diagram illustrating the configuration of a fire receiver according to a first embodiment. [Diagram 3] FIG. 2 is a diagram illustrating a database 261 according to the first embodiment. [Figure 4] 2 is a diagram illustrating a configuration of a telephone repeater 40 according to the first embodiment. FIG. [Diagram 5] 3A to 3C are diagrams illustrating an example of display on an operation display unit 12 according to the first embodiment. [Figure 6] FIG. 11 is a system configuration diagram of a distributed fire alarm system 100 according to a second embodiment. [Figure 7] FIG. 11 is a diagram illustrating the configuration of a fire receiver 10 according to a second embodiment. [Figure 8] FIG. 11 is a diagram illustrating a configuration of a main repeater 80 according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiment, and various modifications can be made without departing from the spirit of the present invention. The present invention also includes any combination of possible configurations among the configurations shown in the following embodiments. The device shown in the drawings is an example of the device of the present invention, and the device shown in the drawings does not limit the device of the present invention. In each drawing, the same reference numerals are used to denote the same or equivalent objects, and this is common throughout the entire specification. In each drawing, the relative dimensional relationship or shape of each component may differ from the actual ones.

[0010] Embodiment 1 (System configuration of fire alarm system 1) FIG. 1 is a diagram for explaining the configuration of a fire alarm system 1 according to the first embodiment. The fire alarm system 1 includes a fire receiver 10 and a telephone repeater 40. The fire receiver 10 is provided with a telephone master unit 14 for emergency calls, and a call can be made between the telephone master unit 14 and a telephone handset 4 connected to the telephone repeater 40. A fire detector 2 is installed in the fire receiver 10 via a transmission line 5. In the example of FIG. 1, a plurality of transmission lines 5 are connected to the fire receiver 10, and a fire detector 2 is connected to each of the transmission lines 5. Furthermore, a detector repeater 3 that detects a fire by a so-called P-type fire detector such as a contact type (not shown) and transmits a fire signal to the fire receiver 10 may be connected to the transmission line 5. When the fire detector 2 detects a physical change associated with a fire, it transmits a fire signal indicating that there is a fire to the transmission line 5. The fire signal includes information (e.g., an address number) that can identify the fire detector 2, and the fire receiver 10 can identify the location of the fire. Furthermore, the fire receiver 10 that receives the fire signal outputs a signal to notify terminal devices such as alarm devices such as buzzers or lights, smoke control devices such as fire doors or shutters, or fire extinguishing equipment, to notify the terminal devices of the occurrence of a fire, thereby operating the terminal devices. Furthermore, an emergency broadcast system 60 is connected to the fire receiver 10 of this embodiment. The emergency broadcast system 60 is a device that issues an emergency broadcast within the building when the fire detector 2 is activated, when the occurrence of a fire is confirmed by the fire receiver 10, etc.

[0011] The housing 11 constituting the outer shell of the fire receiver 10 is provided with an operation display unit 12, operation buttons 13, and a telephone master unit 14. The operation display unit 12 is, for example, a liquid crystal display equipped with a touch panel, and functions as a screen display device that accepts operations by an operator and displays information notifying the occurrence of a fire using characters or figures. The operation buttons 13 are an input device and are used to operate the fire receiver 10. Note that instead of the operation display unit 12, a screen display device such as a liquid crystal display without a touch panel may be provided in the fire receiver 10. The telephone master unit 14 is used by being connected to a telephone jack, which is a connection terminal provided in the housing 11.

[0012] The fire receiver 10 of this embodiment is connected to the emergency broadcast equipment 60 via a communication line 8. The fire receiver 10 has connection terminals F and T that are connected to this communication line 8. The connection terminals F and T are provided in the same number as the types of signals to be transmitted to the emergency broadcast equipment 60. For example, when the fire receiver 10 monitors a multi-story building, the same number of connection terminals F and T as the number of floors can be provided to output information for each floor to the emergency broadcast equipment 60. The connection terminal F outputs a fire detection signal, and the connection terminal T outputs an incoming emergency call signal.

[0013] The fire receiver 10 and the telephone repeater 40 are connected via a transmission line 5 and a telephone line 7. In FIG. 1, two transmission lines 5 are connected to the fire receiver 10, and only one telephone repeater 40 is connected to each transmission line 5, but it is possible to connect multiple telephone repeaters 40 to one transmission line 5. In addition, a pair of telephone lines 7 consisting of two connection lines is connected to the fire receiver 10, and this telephone line 7 is branched into the same number as the number of telephone repeaters 40, and each branched line is connected to a telephone repeater 40. In other words, even if multiple telephone repeaters 40 are provided in the fire alarm system 1, only one pair of telephone lines 7 is drawn out from the fire receiver 10. A voice call is made between the telephone handset 4 connected to the telephone repeater 40 and the telephone master unit 14 of the fire receiver 10 via the telephone line 7.

[0014] The telephone repeater 40 is a device that is disposed between the telephone base unit 14 and the telephone handset 4 to relay calls. A plurality of telephone handsets 4 can be connected to the telephone repeater 40. The telephone repeater 40 and the telephone handset 4 are connected by a telephone line 9 consisting of two connection lines.

[0015] (Configuration of fire control receiver 10) Fig. 2 is a diagram for explaining the configuration of the fire receiver according to the embodiment 1. The fire receiver 10 includes an operation display unit 12, an operation button 13, a telephone master unit 14, a first emergency broadcast cutoff switch 15, a second emergency broadcast cutoff switch 16, a control circuit 20, a transmission circuit 21, a telephone circuit 23, a short circuit detection circuit 24, a report transfer circuit 25, and a storage device 26. The circuits and the like constituting the fire receiver 10 shown in Fig. 2 are housed or installed in a housing 11 (see Fig. 1).

[0016] The control circuit 20 is composed of dedicated hardware, or a microcomputer having a memory and a CPU (Central Processing Unit). The control circuit 20 is provided with input / output ports connected to the operation display unit 12, the operation button 13, the first emergency broadcast cutoff switch 15, the second emergency broadcast cutoff switch 16, the transmission circuit 21, the telephone circuit 23, the short circuit detection circuit 24, the report transfer circuit 25, and the storage device 26. The control circuit 20 controls each circuit via the input / output ports.

[0017] The transmission circuit 21 is connected to the transmission line 5, and acquires a fire signal transmitted to the transmission line 5 in response to the fire detection by the fire detector 2. The transmission circuit 21 then outputs the fire signal to the control circuit 20. The fire detector 2 continues to transmit the fire signal when it detects a fire, and stops transmitting the fire signal when it detects that the fire has been eliminated. The transmission circuit 21 continues to output the fire signal to the control circuit 20 while detecting the fire signal. In addition, the transmission circuit 21 of this embodiment detects an emergency call signal, a busy signal, and a hold signal transmitted from the telephone repeater 40 to the transmission line 5, and outputs the detected signal to the control circuit 20. Each signal includes information (hereinafter, referred to as an address number) that can identify the telephone repeater 40 that transmitted the signal, and information (hereinafter, referred to as a call number) that can identify the telephone handset 4 connected to the telephone repeater 40, and the fire receiver 10 can identify which telephone handset 4 transmitted the signal. In addition, when calling the telephone handset 4, the transmission circuit 21 transmits a handset call signal to the telephone repeater 40. This signal also contains the address number of the telephone repeater 40 and the serial number of the telephone handset 4 so that the called telephone handset 4 can be identified in the same manner as above.

[0018] The telephone circuit 23 is a circuit that enables voice communication between the telephone base unit 14 and the telephone handset 4 connected to the telephone repeater 40. The telephone circuit 23 is connected to a telephone jack provided in the fire control device 10 and functioning as a connection terminal for the telephone base unit 14, and to the telephone line 7. The telephone line 7 is composed of two connection lines and connects the telephone circuit 23 to the telephone repeater 40. The telephone circuit 23 is a circuit that detects that the telephone base unit 14 has been picked up. In addition, the telephone circuit 23 converts the voice input from the telephone base unit 14 into a voice signal and outputs it to the telephone line 7, and also converts the voice signal input from the telephone line 7 into voice and outputs it to the telephone base unit 14. Note that the voice may be converted into a voice signal and the voice signal may be converted into voice on the telephone base unit 14 and telephone handset 4 side.

[0019] The short circuit detection circuit 24 is a circuit that detects a short circuit in the telephone line 7 via the telephone circuit 23. The short circuit detection circuit 24 monitors the voltage of the telephone line 7, and detects a change in voltage due to a short circuit in the telephone line 7, thereby detecting a short circuit in the telephone line 7.

[0020] The report transfer circuit 25 is a circuit that transmits a report transfer signal to the emergency broadcast equipment 60. The report transfer circuit 25 has a fire report transfer circuit 251 and an emergency telephone report transfer circuit 252. The fire report transfer circuit 251 is connected to the connection terminal F, and when the fire receiver 10 receives a fire report from the fire detector 2, outputs a report transfer signal to notify the emergency broadcast equipment 60 of a fire. The emergency telephone report transfer circuit 252 is connected to the connection terminal T, and when there is an incoming call from the telephone handset 4, outputs a report transfer signal to notify the emergency broadcast equipment 60 of an incoming emergency call.

[0021] The storage device 26 is a rewritable memory such as an electrically erasable programmable read-only memory (EEPROM), etc. The storage device 26 stores a database 261 in addition to the programs executed by the control circuit 20.

[0022] The first emergency broadcast cutoff switch 15 is a switch for switching between on and off the output of a transfer signal to the emergency broadcast equipment 60 by the fire broadcast transfer circuit 251. The second emergency broadcast cutoff switch 16 is a switch for switching between on and off the output of a transfer signal to the emergency broadcast equipment 60 by the emergency telephone broadcast transfer circuit 252. The first emergency broadcast cutoff switch 15 and the second emergency broadcast cutoff switch 16 are switched on and off by an operator. For example, when testing the fire alarm system 1, the first emergency broadcast cutoff switch 15 and the second emergency broadcast cutoff switch 16 are turned off to prevent unnecessary emergency broadcasts from being made within the building.

[0023] 3 is a diagram for explaining the database 261 according to the first embodiment. The database 261 stores information (T1, T2, T3 in FIG. 3) for identifying the connection terminal T connected to the emergency broadcast equipment 60, an address number (C1, C2 in FIG. 3) for identifying the telephone repeater 40, and a serial number (D11, D12, D21 in FIG. 3) for identifying the telephone handset 4 connected to the telephone repeater 40, in association with each other. In the example of FIG. 3, the telephone repeater C1 and the telephone handset D11 are associated with the connection terminal T1. In this example, when an incoming call is received from the telephone handset D11, a transfer signal is output from the connection terminal T1 to the emergency broadcast equipment 60.

[0024] (Configuration of telephone repeater 40) 4 is a diagram illustrating the configuration of the telephone repeater 40 according to the embodiment 1. The telephone repeater 40 includes a control circuit 41, a sound generating circuit 42, a transmission circuit 43, a telephone circuit 45, a disconnection detection circuit 46, a contact input detection circuit 48, a signal input circuit 47, a plurality of telephone jacks 49, a call line switching circuit 50, a telephone circuit 51, and a contact 52.

[0025] The control circuit 41 is composed of dedicated hardware or a microcomputer having a memory and a CPU (Central Processing Unit). The control circuit 41 is provided with a sound generating circuit 42, a transmission circuit 43, a telephone circuit 45, a disconnection detection circuit 46, a contact input detection circuit 48, a signal input circuit 47, a call line switching circuit 50, and an input / output port connected to the contact 52. The control circuit 41 controls each circuit via the input / output port.

[0026] The sound generating circuit 42 is a circuit that generates a call sound output to the telephone handset 4 to call the telephone handset 4, a busy sound output to the telephone handset 4 when the telephone base unit 14 is busy, and a hold sound output when a call is put on hold. The busy sound and the hold sound may be a common sound as appropriate. Also, a call sound output to the telephone base unit 14 while the telephone handset 4 is being called may be generated. The sound generating circuit 42 is connected to a connection line that connects the telephone circuit 45 and the call line switching circuit 50 via a contact 52. When the contact 52 is turned on, the sound generated by the sound generating circuit 42 is output to the telephone circuit 51 connected by the telephone circuit 45 and the call line switching circuit 50.

[0027] The transmission circuit 43 is connected to the transmission line 5, and when there is an incoming call from the telephone handset 4, it transmits an incoming call signal indicating the incoming call to the transmission line 5. As shown in Figures 1 and 2, the fire control device 10 is connected to this transmission line 5, and the incoming call signal is transmitted from the telephone repeater 40 to the fire control device 10. The incoming call signal includes information identifying the telephone handset 4 that has received the incoming call, as described above.

[0028] The telephone circuit 45 is connected to the fire receiver 10 via the telephone line 7 (see FIG. 2), and is a circuit that enables voice communication between the telephone handset 4 and the telephone base unit 14 of the fire receiver 10. One of the connection lines drawn from the telephone circuit 45 is connected to the communication line switching circuit 50. The other of the connection lines drawn from the telephone circuit 45 is connected to telephone circuits 51 corresponding to each of the multiple telephone jacks 49. The telephone circuit 45 is a circuit that enables voice communication between the telephone handset 4 and the telephone base unit 14 of the fire receiver 10. The telephone circuit 45 converts the voice output from the telephone handset 4 and input via the telephone line 9 into a voice signal and outputs it to the telephone line 7, and also converts the voice signal input from the telephone line 7 into voice and outputs it to the telephone circuit 51. Note that, as described above, when the voice is converted into a voice signal and the voice signal is converted into voice in the telephone handset 4, the telephone circuit 45 does not have to perform the conversion.

[0029] The disconnection detection circuit 46 is a circuit that detects whether or not the telephone line 7 is disconnected, and is connected to the telephone line 7 via the telephone circuit 45. The disconnection detection circuit 46 illustrated in Fig. 4 includes a contact 461 and a current detection circuit 462. When the contact 461 is closed, it is detected whether or not the telephone line 7 is disconnected, depending on whether or not the current detection circuit 462 detects the current flowing through the telephone line 7.

[0030] The signal input circuit 47 is a circuit that is connected to the facility equipment 70 via a power line 71 and inputs and outputs control signals between the facility equipment 70. Here, the facility equipment 70 is a device that is linked to the fire control panel 10 via the telephone repeater 40. Examples of the facility equipment 70 include smoke control devices such as fire doors or shutters, and fire extinguishing devices such as fire pumps.

[0031] The contact input detection circuit 48 is a circuit that detects that the contact of the equipment 70 connected to the power line 71 has been turned on, i.e., that the equipment 70 has been electrically connected to the telephone repeater 40.

[0032] The telephone jack 49 is a connection terminal for the telephone handset 4. The telephone repeater 40 is provided with a plurality of telephone jacks 49. The telephone circuits 51 are provided in the same number as the telephone jacks 49. The telephone circuit 51 is a circuit that detects when the handset 4 is picked up. The telephone circuit 51 is also a circuit that relays voice and audio signals between the telephone handset 4 and the telephone circuit 45. Like the telephone circuit 45, the telephone circuit 51 does not need to perform conversion of voice and audio signals if the conversion is performed by the telephone handset 4.

[0033] The call line switching circuit 50 is a circuit that selectively connects one of a plurality of telephone circuits 51 to the telephone circuit 45. The call line switching circuit 50 has contacts 501, 502, and 503 that are connected to the telephone circuits 51, respectively. When any of the contacts 501, 502, and 503 is closed, the telephone circuit 51 corresponding to the closed contact is connected to the telephone circuit 45.

[0034] (Fire alarm system 1 operation) First, an example of one-to-one call between one handset 4 and base unit 14 is shown. Assume that handset 4 is connected to one of a plurality of telephone jacks 49 of telephone repeater 40. When the handset of handset 4 connected to telephone repeater 40 is picked up, telephone circuit 51 to which handset 4 is connected detects and outputs to control circuit 41. The call line switching circuit 50, which receives a control output from control circuit 41, connects telephone circuit 51 corresponding to handset 4 whose handset has been picked up to telephone circuit 45. Then, an incoming call signal indicating an incoming call is sent to transmission line 5 via transmission circuit 43. In addition, contact 52 is turned on, and a hold tone generated by sound generating circuit 42 is output to handset 4.

[0035] When the fire receiver 10 detects an incoming call signal from the telephone repeater 40 via the transmission circuit 21, it displays information indicating the incoming call on the operation display unit 12 and outputs a sound indicating the incoming call from a speaker or the like. This allows the monitor of the fire receiver 10 to know that an emergency call has been received from the telephone handset 4. At this time, the operation display unit 12 displays information identifying the telephone handset 4 that has received the call, such as the building, floor, area, and address of the building in which the telephone handset 4 is installed. When the monitor picks up the receiver of the telephone base unit 14, a voice call is made between the telephone base unit 14 and the telephone handset 4 via the telephone line 7. When an incoming call from the telephone handset 4 is detected via the transmission circuit 21, the transfer circuit 25 outputs a transfer signal to the emergency broadcast equipment 60 from the connection terminal T corresponding to the telephone handset 4 that has received the call. The emergency broadcast equipment 60 that has received the emergency call transfer signal makes a specified emergency broadcast.

[0036] In the above operation, the connection between the telephone base unit 14 and the telephone handset 4 is automatically established by simply picking up the receiver, but the connection may also be established when the operation display unit 12 of the fire receiver 10 is operated. Specifically, the connection between the telephone circuit 51 and the telephone circuit 45 by the call line switching circuit 50 is established when the information portion indicating an incoming call displayed on the operation display unit 12 of the fire receiver 10 that has received an incoming call signal is operated, and a connection control signal is sent from the fire receiver 10 to the telephone repeater 40, and the connection is established when the signal is received. In this manner, when the receivers of multiple telephone handsets 4 are picked up, it is possible to select which telephone handset 4 to talk to.

[0037] Next, an operation when calling the handset 4 from the base station 14 will be described. It is assumed that the handset 4 is connected to the telephone jack 49 of the telephone repeater 40. The operation display unit 12 of the fire receiver 10 displays information on all the handset 4 connected to the fire alarm system 1. The information on the handset 4 may be displayed on the operation display unit 12 using the building, floor, area, and address of the building in which each handset 4 is installed. In this way, the operator can intuitively select the handset 4 to be called using the information displayed on the operation display unit 12. When the handset 4 is identified by the operation display unit 12 and the handset of the base station 14 is picked up, a call signal including information identifying the handset 4 to be called is sent from the transmission circuit 21 through the transmission line 5 to the telephone repeater 40 to which the specific handset 4 is connected. This call signal is received by the transmission circuit 43 of the telephone repeater 40.

[0038] In the telephone repeater 40 that receives the outgoing signal, if the called telephone handset 4 is not busy, a ring tone is generated by the sound generation circuit 42. In addition, the telephone circuit 51 of the called telephone handset 4 is connected to the telephone circuit 45 by the call line switching circuit 50. Furthermore, the contact 52 is turned on, and the ring tone generated by the sound generation circuit 42 is output to the telephone handset 4. When the operator who hears the ring tone picks up the receiver of the telephone handset 4, a voice call is made between the telephone handset 4 and the telephone base unit 14.

[0039] In telephone repeater 40 which receives the outgoing signal, if the handset of called telephone handset 4 is picked up, a busy signal is generated by control circuit 41, and the generated busy signal is transmitted to fire control device 10 via transmission circuit 43. Fire control device 10 which receives the busy signal displays on operation display unit 12 information indicating that a call is in progress or that the handset of telephone handset 4 has been picked up.

[0040] Next, the operation when a call is made between the telephone base unit 14 and two telephone handsets 4 connected to one telephone repeater 40 will be described. First, it is assumed that a call is being made between one telephone handset 4 and the telephone base unit 14. The call line switching circuit 50 of the telephone repeater 40 is in a state in which the telephone handset 4 in the call is connected to the telephone circuit 45. At this time, when the handset of the other telephone handset 4 is picked up, the call line switching circuit 50 closes the contact corresponding to the other telephone handset 4 whose handset has been picked up, and connects the telephone circuit 45 to the telephone circuit 51 corresponding to the other telephone handset 4. As a result, a voice call is made between the two telephone handsets 4 and the telephone base unit 14. Note that, as described above, a voice call may be made between the two selected telephone handsets 4 and the telephone base unit 14 based on the operation of the operation display unit 12 of the fire control device 10.

[0041] Next, the operation when the telephone base unit 14 of the fire control device 10 is in a call with the telephone handset 4 connected to one telephone repeater 40 (referred to as telephone repeater 40A for distinction) and the handset of the telephone handset 4 of the other telephone repeater 40 (referred to as telephone repeater 40B for distinction) is picked up will be described. Assume that the handset of the telephone handset 4 connected to the telephone repeater 40B is picked up while the telephone handset 4 connected to the telephone repeater 40A is in a call with the telephone base unit 14. The telephone repeater 40B connects the telephone circuit 45 to the telephone circuit 51 of the telephone handset 4 whose handset has been picked up by the call line switching circuit 50. In addition, the telephone repeater 40B notifies the fire control device 10 of an incoming emergency call via the transmission circuit 43 and the transmission line 5. Since the telephone base unit 14 is in a call with the telephone handset 4 of the telephone repeater 40A, the fire control device 10 sends a busy signal to the telephone repeater 40B via the transmission line 5. When the sound generating circuit 42 of the telephone repeater 40B receives the busy signal, it generates a busy tone, and the generated busy tone is output to the telephone handset 4 via the ON contact 52. This allows a person who picks up the handset of the telephone handset 4 connected to the telephone repeater 40B to hear the busy tone and understand that the telephone base unit 14 is busy.

[0042] Next, an operation when an emergency call is put on hold will be described. It is assumed that a call is being made between the telephone master 14 and the telephone handset 4. When the telephone master 14 puts a call on hold, the operator presses a hold button (not shown) provided on the fire control device 10 or the telephone master 14. When the hold button is pressed, a hold signal is transmitted from the transmission circuit 21 of the fire control device 10 to the transmission line 5. In the telephone repeater 40 that receives the hold signal via the transmission line 5, a hold tone is generated by the sound generating circuit 42, and this hold tone is output to the telephone handset 4 via the contact 52 in the ON state. This allows the operator of the telephone handset 4 to know that the telephone master 14 is on hold. Also, when the telephone handset 4 puts a call on hold, the operator presses a hold button provided on the telephone repeater 40 or the telephone handset 4. When the hold button is pressed, a hold signal is transmitted from the transmission circuit 43 of the telephone repeater 40 to the transmission line 5. The operation display unit 12 of the fire control device 10 that receives the hold signal via the transmission line 5 displays information indicating that the telephone handset 4 is on hold.

[0043] Next, the operation when a fire is detected and an emergency call is made at the same time will be described. When the fire detector 2 detects a fire, a fire signal is sent to the transmission line 5, and the fire signal is transmitted to the fire receiver 10. Upon receiving the fire signal, the fire receiver 10 outputs information to the operation display unit 12 informing the user of the occurrence of a fire and the location of the fire detector 2 that detected the fire, and also outputs an alarm sound. This allows the person monitoring the fire receiver 10 to know that a fire has occurred. Subsequently, when the handset 4 is picked up, the handset 4 and the base unit 14 of the fire receiver 10 are connected as described above, and voice communication between the handset 4 and the base unit 14 becomes possible.

[0044] FIG. 5 is a diagram for explaining a display example of the operation display unit 12 according to the first embodiment. FIG. 5(a) is a display example of the operation display unit 12 in a state where a fire alert has been received but an incoming call from the telephone handset 4 has not been received. Information informing of the occurrence of a fire is displayed in the first area 121, which is a part of the display screen of the operation display unit 12. In this state, when an incoming call is further received from the telephone handset 4, information informing of the occurrence of a fire is displayed in a part of the first area 121, and information informing of the incoming call from the telephone handset 4 is displayed in the remaining part of the first area 121, as shown in FIG. 5(b). In this way, the information received by the fire receiver 10 is displayed in the first area 121, which is a specified area, and when there is a plurality of pieces of information received, the first area 121 is divided to display the plurality of pieces of information. Therefore, the monitor can obtain information from the monitoring area by focusing on the first area 121, which is a specified area. When the fire receiver 10 receives a plurality of pieces of information, the plurality of pieces of information are displayed in the first area 121, so that the monitor can grasp the plurality of pieces of information at the same time.

[0045] Unlike the example of FIG. 5, when a fire is detected after an emergency call is received, information notifying the reception of the emergency call is displayed in the first area 121. When a fire is subsequently detected, the emergency call is displayed in a part of the first area 121, and information notifying the occurrence of a fire is displayed in the rest. When a terminal device such as a smoke control device or a fire extinguishing device is connected to the fire alarm system 1 and the terminal device is activated, information indicating that the terminal device has been activated may be displayed in the first area 121 following the example of FIG. 5. When a gas leak detector is connected to the fire alarm system 1 and a gas leak is detected, information indicating that the terminal device has been activated may be displayed in the first area 121 following the example of FIG. 5. When the fire receiver 10 receives a plurality of pieces of information exemplified here, for example, four or more pieces of information, the first area 121 may be divided into four areas, and information may be displayed in each of the areas.

[0046] Next, a method of setting when increasing or decreasing the number of telephone repeaters 40 or telephone cordless handsets 4 constituting the fire alarm system 1 will be described. As shown in FIG. 3, the database 261 is stored in the storage device 26 of the fire receiver 10. When increasing or decreasing the number of either or both of the telephone repeaters 40 and the telephone cordless handsets 4, the operator rewrites the database 261. The database 261 is rewritten, for example, using a personal computer or a dedicated terminal connected to the fire receiver 10. By rewriting the database 261 of the fire receiver 10, the connection terminal F connected to the emergency broadcast equipment 60 can be associated with the telephone repeater 40 and the telephone cordless handsets 4. For this reason, it is easy to add telephone repeaters 40 and telephone cordless handsets 4 to the existing fire alarm system 1. In addition, the fire receiver 10 of this embodiment can accommodate both a small number of lines and a large number of lines by rewriting the database 261.

[0047] Next, the operation when detecting a break in the telephone line 7 will be described. The detection of a break in the telephone line 7 is performed by an instruction from the fire receiver 10. The fire receiver 10 transmits a break detection signal to the telephone repeater 40 connected to the fire receiver 10 via the transmission line 5, which instructs the telephone repeater 40 to detect a break. The fire receiver 10 periodically transmits the break detection signal to the telephone repeater 40. When multiple telephone repeaters 40 are connected to the fire receiver 10, the break detection signal is transmitted to each telephone repeater 40 at a timing that does not overlap. The telephone repeater 40 that receives the break detection signal closes the contact 461 of the break detection circuit 46, and determines whether or not there is a break based on the value of the current detected by the current detection circuit 462 at this time. Then, information regarding the presence or absence of a break in the telephone line 7 is transmitted to the fire receiver 10 via the transmission line 5.

[0048] The short circuit of the telephone line 7 is monitored, for example, by the fire receiver 10. The fire receiver 10 monitors the voltage applied to the telephone line 7, and detects that the telephone line 7 is short circuited when the voltage falls below a threshold value.

[0049] As described above, according to the present embodiment, since the fire control device 10 has the function of an emergency telephone device, there is no need to install an emergency telephone device separately from the fire control device 10. Therefore, the area in which the device having the functions of the fire control device and the emergency telephone device is installed can be made smaller than in the past. Therefore, the degree of freedom in the size of the room in which the fire control device 10 is installed is increased.

[0050] Furthermore, only one set of telephone lines 7 consisting of two connection lines is drawn from the fire control device 10 functioning as an emergency telephone device and connected to the telephone repeater 40. Even if there are multiple telephone handsets 4, only one set of telephone lines 7 is connected to the fire control device 10. This prevents the wiring around the fire control device 10 from becoming complicated, and reduces the cost associated with the wiring.

[0051] Furthermore, the telephone repeater 40 of this embodiment includes a sound generating circuit 42, and the sound generated by the sound generating circuit 42 is output to the telephone handset 4. Sounds such as busy tones or hold tones to be output to the telephone handset 4 are generated by the sound generating circuit 42 of the telephone repeater 40, and the fire receiver 10 does not need to generate sounds for each telephone repeater 40. Therefore, even if multiple telephone repeaters 40 are provided in the fire alarm system 1, the processing load of the fire receiver 10 does not increase. Furthermore, sounds such as busy tones or hold tones do not flow through the telephone line 7 connecting the fire receiver 10 and the telephone repeater 40, so that noise generated during a call using the telephone line 7 can be suppressed.

[0052] Embodiment 2 In this embodiment, a description will be given of a distributed fire alarm system 100. In this embodiment, differences from the first embodiment will be mainly described.

[0053] (System configuration of distributed fire alarm system 100) FIG. 6 is a system configuration diagram of a distributed fire alarm system 100 according to the second embodiment. The distributed fire alarm system 100 includes a fire receiver 10 and a main repeater 80, and the fire receiver 10 and the main repeater 80 are connected by a communication network. Specifically, the fire receiver 10 and the main repeater 80 are connected by a communication line 90 and an audio signal line 91. The fire receiver 10 has the same configuration as the fire receiver 10 described in the first embodiment, except for the configuration related to the connection with the communication line 90 and the audio signal line 91. In this embodiment, for the sake of distinction, the transmission line connected to the fire receiver 10 is referred to as the first transmission line 5A, and the transmission line connected to the main repeater 80 is referred to as the second transmission line 5B. Note that FIG. 6 shows an example in which one main repeater 80 is connected to the distributed fire alarm system 100, but multiple main repeaters 80 may be connected. 6, for the sake of distinction, the telephone repeater connected to the fire control device 10 is indicated by the reference symbol 40A, and the telephone repeater connected to the main repeater 80 is indicated by the reference symbol 40B. The telephone repeater 40A and the telephone repeater 40B have the same configuration as the telephone repeater 40 described in the first embodiment.

[0054] The main repeater 80 is connected to the fire detector 2 and the telephone repeater 40 via the second transmission line 5B. When the main repeater 80 receives a fire signal from the fire detector 2 connected to the second transmission line 5B, it transmits a signal notifying the occurrence of a fire to the fire receiver 10 via the communication line 90. The main repeater 80 also relays voice calls between the telephone handset 4 connected to the telephone repeater 40B and the telephone master unit 14 of the fire receiver 10.

[0055] The communication line 90 is, for example, a metal wiring or an optical wiring, and transmits a communication signal between the fire receiver 10 and the main repeater 80. The audio signal line 91 is made up of two connection lines, and transmits an audio signal between the fire receiver 10 and the main repeater 80. The audio signal line 91 may also be a single optical wiring.

[0056] (Configuration of fire control receiver 10) FIG. 7 is a diagram for explaining the configuration of the fire receiver 10 according to the second embodiment. In addition to the configuration explained in the first embodiment, the fire receiver 10 includes a first signal conversion circuit 27 and a second signal conversion circuit 28. The first signal conversion circuit 27 is a circuit that converts an audio signal corresponding to the voice input from the telephone base unit 14 to the telephone circuit 23 into a signal corresponding to a communication protocol applied to communication using the audio signal line 91, and sends the converted signal to the audio signal line 91. The second signal conversion circuit 28 is a circuit that converts information acquired via the first transmission line 5A into a signal corresponding to a communication protocol applied to communication using the communication line 90, and sends the converted signal to the communication line 90.

[0057] (Configuration of main repeater 80) 8 is a diagram illustrating the configuration of a main repeater 80 according to embodiment 2. The main repeater 80 includes a control circuit 81, a storage device 82, a transmission circuit 83, a telephone circuit 85, a short circuit detection circuit 86, a first signal conversion circuit 87, and a second signal conversion circuit 88.

[0058] The control circuit 81 is composed of dedicated hardware, or a microcomputer having a memory and a CPU (Central Processing Unit). The control circuit 81 is provided with input / output ports connected to a storage device 82, a transmission circuit 83, a telephone circuit 85, a short circuit detection circuit 86, a first signal conversion circuit 87, and a second signal conversion circuit 88. The control circuit 81 controls each circuit via the input / output ports.

[0059] The transmission circuit 83, the telephone circuit 85, and the short circuit detection circuit 86 have the same functions as the transmission circuit 21, the telephone circuit 23, and the short circuit detection circuit 24 of the fire receiver 10 described in the first embodiment and FIG. 7. The first signal conversion circuit 87 and the second signal conversion circuit 88 have the same functions as the first signal conversion circuit 27 and the second signal conversion circuit 28 of the fire receiver 10 described in FIG. 7. As can be seen by comparing FIG. 7 and FIG. 8, the main repeater 80 does not have the operation display unit 12 and the operation button 13 of the fire receiver 10, the configuration for connecting to the emergency broadcast equipment 60 (see FIG. 1), and the telephone master unit 14. The main function of the main repeater 80 is to transmit various signals from the fire detector 2 and the telephone repeater 40 connected to the second transmission line 5B connected to the main repeater 80 to the fire receiver 10.

[0060] (Telephone repeater 40) The telephone repeaters 40A and 40B connected to the distributed fire alarm system 100 of this embodiment have the same basic functions as the telephone repeater 40 described in the first embodiment.

[0061] (Operation of the distributed fire alarm system 100) The operation of a call between the handset 4 of the telephone repeater 40B connected to the main repeater 80 and the base unit 14 of the fire control device 10 will be described. When the handset of the handset 4 connected to the telephone repeater 40B is picked up, as described in the first embodiment, an incoming call signal indicating an incoming call is sent from the telephone repeater 40B to the main repeater 80 via the second transmission line 5B. The main repeater 80, which receives the incoming call signal from the handset 4, converts the incoming call signal into a signal corresponding to the communication protocol of the communication line 90 by the second signal conversion circuit 88 and sends it to the communication line 90. When the fire control device 10 receives the incoming call signal received via the communication line 90, it displays information indicating an incoming call on the operation display unit 12 and outputs a sound indicating an incoming call. This allows the monitor of the fire control device 10 to know that an emergency call is coming from the handset 4. When the monitor picks up the handset of the base unit 14, a voice call is made between the base unit 14 and the handset 4 via the audio signal line 91 and the telephone line 7. When the emergency broadcast equipment 60 (see FIG. 1) is connected to the fire receiving device 10, an emergency broadcast signal is transmitted from the fire receiving device 10 to the emergency broadcast equipment 60 as described in the first embodiment.

[0062] Next, the operation when a call is made between the telephone base unit 14 and two telephone handsets 4 connected to one telephone repeater 40B will be described. First, assume that a call is in progress between one telephone handset 4 connected to the telephone repeater 40B and the telephone base unit 14. At this time, if the handset of the other telephone handset 4 is picked up, the telephone repeater 40B connects the other telephone handset 4 whose handset has been picked up to the main repeater 80 via the telephone line 7. As a result, a voice call is made between the two telephone handsets 4 and the telephone base unit 14 via the telephone line 7 and the audio signal line 91.

[0063] Next, the operation when the telephone base unit 14 of the fire control device 10 is in a call with the telephone handset 4 connected to the telephone repeater 40A and the handset 4 of the other telephone repeater 40B is picked up will be described. First, it is assumed that the telephone handset 4 connected to the telephone repeater 40A and the telephone base unit 14 are in a call. The telephone repeater 40B connects the telephone handset 4 whose handset has been picked up to the main repeater 80 via the telephone line 7. The telephone repeater 40B also notifies the main repeater 80 of an incoming emergency call via the second transmission line 5B. The main repeater 80 transmits an incoming call signal to the fire control device 10 via the communication line 90. Since the telephone base unit 14 is in a call with the telephone handset 4 of the telephone repeater 40A, the fire control device 10 sends a busy signal to the main repeater 80 via the communication line 90. The main repeater 80 sends a busy signal to the telephone repeater 40B via the second transmission line 5B. When the telephone repeater 40B receives the busy signal, it generates a busy tone, and the generated busy tone is output to the telephone handset 4. As a result, a person who picks up the handset of the telephone handset 4 can hear the busy tone and can understand that the telephone base unit 14 is busy.

[0064] As described above, according to this embodiment, the same effects as those of the first embodiment can be obtained in the distributed fire alarm system 100. Note that in the distributed fire alarm system 100, the operation related to an emergency call made between the telephone master 14 of the fire receiver 10 and the telephone handset 4 connected to the telephone repeater 40A is the same as that described in the first embodiment.

[0065] (Modification) 1, it has been described that the fire receiver 10 is provided with a plurality of connection terminals F and T for connecting to the emergency broadcast equipment 60. Instead of providing a plurality of connection terminals F and T in the fire receiver 10, a repeater for adding connection terminals F and T may be disposed between the emergency broadcast equipment and the fire receiver 10. [Explanation of symbols]

[0066] 1 fire alarm system, 2 fire detector, 3 detector repeater, 4 telephone handset, 5 transmission line, 5A first transmission line, 5B second transmission line, 7 telephone line, 8 communication line, 9 telephone line, 10 fire receiver, 11 housing, 12 operation display unit, 13 operation button, 14 telephone base unit, 15 first emergency broadcast cutoff switch, 16 second emergency broadcast cutoff switch, 20 control circuit, 21 transmission circuit, 23 telephone circuit, 24 short circuit detection circuit, 25 report transfer circuit, 26 memory device, 27 first signal conversion circuit, 28 second signal conversion circuit, 40 telephone repeater, 40A telephone repeater, 40B telephone repeater, 41 control circuit, 42 sound generation circuit, 43 transmission circuit, 45 telephone circuit, 46 break detection circuit, 47 signal input circuit, 48 contact input detection circuit, 49 telephone jack, 50 Call line switching circuit, 51 telephone circuit, 52 contact, 60 emergency broadcast equipment, 70 facility equipment, 71 power line, 80 main repeater, 81 control circuit, 82 memory device, 83 transmission circuit, 85 telephone circuit, 86 short circuit detection circuit, 87 first signal conversion circuit, 88 second signal conversion circuit, 90 communication line, 91 audio signal line, 100 distributed fire alarm system, 121 first area, 251 fire alarm transfer circuit, 252 emergency telephone alarm transfer circuit, 261 database, 461 contact, 462 current detection circuit, 501 contact, 502 contact, 503 contact, F connection terminal, T connection terminal.

Claims

1. a fire receiver connected to the fire detector via a transmission line and having an emergency telephone master unit; a telephone repeater connected to the fire receiver via a first telephone line and the transmission line, and connected to a telephone handset via a second telephone line; The telephone repeater includes: a first telephone circuit connected to the first telephone line; and a second telephone circuit connected to the second telephone line; a call line switching circuit that connects the second telephone circuit to the first telephone circuit when an incoming call is received from the handset; Fire alarm system.

2. a fire receiver connected to the fire detector via a transmission line and having an emergency telephone master unit; a telephone repeater connected to the fire receiver via a first telephone line and the transmission line, and connected to a telephone handset via a second telephone line; The telephone repeater includes: A call line switching circuit is provided for connecting the second telephone line to the first telephone line when an incoming call is received from the handset. Fire alarm system.

3. a fire receiver having an emergency telephone master unit; a telephone repeater to which the telephone handset is connected; The fire control device and the telephone repeater are connected via a telephone line, In a fire alarm system, the telephone repeater transmits information identifying the telephone handset that has received the call to the fire receiver when the telephone repeater receives a call from the telephone handset, The telephone repeater is provided with a disconnection detection circuit that detects a disconnection of the telephone line. Fire alarm system.

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