JP2006304220A - Intercom system for complex housing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable each housing unit and a simultaneous broadcast apparatus to execute a simultaneous broadcast. <P>SOLUTION: A housing unit 2 is provided with a trunk line interface 14 to be alternatively switched and connected to either of branch lines L2<SB>1</SB>and L2<SB>2</SB>, and separating communication lines La and video line Lb of the connected branch line L2<SB>1</SB>or L2<SB>2</SB>into a communication path and a video path. Accordingly, if the interface 14 of either of the housing units 2A is switched and connected to one trunk line L1<SB>1</SB>and the interface 14 of other housing units 2B and so forth is switched and connected to the other trunk line L1<SB>2</SB>, a voice signal for a simultaneous broadcast outputted from the housing unit 2a is transmitted to the other housing units 2B and so forth through the communication lines La of the trunk lines L1<SB>1</SB>and L1<SB>2</SB>of two systems. As a result, the housing unit 2A can execute the simultaneous broadcast to the other housing units 2B and so forth. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is an assembly that enables communication by alternatively establishing a communication path between a common unit device installed at a common entrance of an apartment house and any one of the dwelling units installed in each dwelling unit. With regard to residential intercom systems, in particular, in addition to individual calls in which a common unit device and one dwelling unit make a one-on-one call, a plurality of dwelling units are provided by a simultaneous broadcasting device installed in a common unit or a manager's room of an apartment house. The present invention relates to an intercom system for collective housing that can broadcast audio to the machine all at once.

Conventionally, a common unit (lobby intercom) installed at the common entrance of an apartment house and capable of voice input and output, and a common unit installed at each dwelling unit of an apartment house are connected via a transmission line and shared. A plurality of dwelling units (such as an interphone master unit and a housing information panel) that establish communication paths with the shared unit device when a visitor selects a selection means (such as a numeric keypad) that the unit device has. A doorphone handset installed in each dwelling unit of a housing complex and connected via a cordless handset connection line to a dwelling unit, and transmitted to each dwelling unit installed in a common area or a manager's room of a housing complex There is provided an intercom system for collective housing provided with a simultaneous broadcasting device that is connected via a track and broadcasts audio to all or some of the dwelling units at once (for example, see Patent Document 1). .
JP-A-6-14125

  However, in spite of the desire to broadcast simultaneously from the dwelling units installed in each dwelling unit, in the above conventional example, it is possible to broadcast all without using the broadcast device installed in the manager's room. There wasn't.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an intercom system for collective housing that can perform simultaneous broadcasting not only by a simultaneous broadcasting device but also by each dwelling unit.

  In order to achieve the above object, the first aspect of the present invention provides a common unit apparatus that is installed at a common entrance of an apartment house and capable of inputting and outputting audio, and a plurality of common unit apparatuses that are installed at each dwelling unit of the apartment house. A plurality of dwelling units that are connected via a transmission line of the system and that establish a communication path with the shared unit when a visitor selects the selection means of the shared unit A broadcasting device installed in a common part of a house or in a manager's room and connected to each dwelling unit through the transmission lines of the plurality of systems and simultaneously broadcasting audio to some or all dwelling units. The transmission line of each system consists of a control line that transmits at least a control signal that is generated in accordance with the operation of the selection means and instructs the start of an individual call, and a signal line that transmits an audio signal. Signal to / from shared unit A communication means for making a call via a communication line, a transmission line switching means for selectively switching to a transmission line of any system, a speaker for ringing at least a broadcast sound, and a signal line connected to the communication means An individual call / broadcast switching unit that selectively switches between a state of being connected to a speaker and a state of being connected to a speaker, a transmission line switching unit and an individual call / broadcast switching unit based on a control signal transmitted through a control line. And control means for controlling the individual call / broadcast switching means to connect the signal line and the transmission line to the speaker when a control signal instructing the start of the broadcast is received via the control line. When any control unit of the dwelling unit transmits a control signal instructing the start of simultaneous broadcasting to the other one or more dwelling units via the control line, The control unit of the dwelling unit of the present invention is configured such that the transmission line switching means is switched and connected to other transmission lines other than the transmission line that is selectively switched by the transmission line switching unit by the transmission unit that has transmitted the broadcast start control signal. Thus, the broadcast audio transmitted from the dwelling unit that has transmitted the broadcast start control signal is transmitted to other dwelling units via a plurality of systems of trunk lines and a simultaneous broadcasting device.

  According to a second aspect of the present invention, in the first aspect of the invention, each dwelling unit includes a notifying unit for notifying a caller that a control signal for starting a broadcast is received during a call with the shared unit, and a notifying unit. Operation means for the caller to selectively select continuation of the call with the shared device and reception of the broadcast in the event of a notification, and the control means of the dwelling unit is controlled by the operation means When reception is selected, the transmission line switching means is switched and connected to other transmission lines excluding the transmission line used for communication with the shared device.

  According to a third aspect of the present invention, in the second aspect of the present invention, the shared unit device includes an imaging unit that images a visitor, and the transmission line includes a video line that transmits an image captured by the imaging unit. The unit is equipped with display means for displaying the video transmitted via the video line, and the control means of the dwelling unit transmits from the common unit device via the video line when reception of the broadcast is selected by the operation means. The displayed image is displayed on the display means.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, each dwelling unit notifies the caller that a control signal for starting an individual call has been received from the shared device during reception of the broadcast. A notification means, and an operation means for the caller to selectively select the continuation of simultaneous broadcast reception and the start of an individual call when notified by the notification means. When the individual call with the shared device is selected by the means, the transmission line switching means is switched and connected to the other transmission lines other than the transmission line used for receiving the broadcast.

  According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the shared device includes an imaging unit that images a visitor, and the transmission line includes a video line that transmits an image captured by the imaging unit. The machine is equipped with display means for displaying the video transmitted through the video line, and the control means of the dwelling unit is transmitted from the shared unit device via the video line when selected by the selection unit of the shared unit device. The video displayed on the display means is displayed and the video transmitted from the shared device via the video line is continuously displayed on the display means even when the continuous broadcast reception is selected by the operation means. To do.

  According to the invention of claim 1, when the control means of any dwelling unit transmits a control signal instructing the start of simultaneous broadcasting to the other one or more dwelling units via the control line, The control unit of the dwelling unit switches and connects the transmission line switching unit to the other transmission lines except the transmission line that the dwelling unit that has transmitted the broadcast start control signal is selectively connected by the transmission line switching unit. The broadcast audio transmitted from the dwelling unit that transmitted the broadcast start control signal is transmitted to other dwelling units via a plurality of trunk lines and a simultaneous broadcasting device. Broadcasting to dwelling units is possible.

  According to the invention of claim 2, when simultaneous broadcasting is started during an individual call with a shared unit device, the communication with the shared unit device is continued in the dwelling unit, or the call with the shared unit device is stopped. Then, the caller (resident) can select and switch whether to receive the broadcast simultaneously.

  According to the invention of claim 3, the resident confirms the visitor because the image picked up by the image pickup means of the shared device is displayed on the display means of the dwelling unit when the reception of the broadcast is selected. be able to.

  According to the invention of claim 4, when the broadcast unit is selected from the shared unit during the reception of the broadcast, the broadcast unit continues to receive the broadcast or cancels the broadcast and receives the broadcast with the shared unit. The resident can select and switch whether to start an individual call.

  According to the invention of claim 5, the resident visits because the video captured by the imaging means of the shared unit is continuously displayed on the display means of the dwelling unit even when the continuous broadcast reception is selected. The state of the person can be confirmed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The structural example of the intercom system for apartment houses of this embodiment is shown in FIG. In the present embodiment, a common unit device (lobby intercom) 1 installed at a common entrance of an apartment house and a plurality of dwelling units 2 installed in each dwelling unit are provided. It is connected via a transmission line. The transmission line includes trunk lines L1 ₁ and L1 ₂ distributed to a plurality of systems (two systems in the illustrated example) in the trunk line control device 3, and branch lines L2 ₁ and L2 ₂ connected to the dwelling units 2 respectively. As this transmission line, a multi-pair twisted pair cable having three or more pairs in the sheath is used. In the illustrated example, a communication line La that transmits an audio signal between the lobby intercom 1 and the dwelling unit 2; Control for transmitting a video signal Lb for transmitting a video signal picked up by the TV camera 67 provided in the lobby intercom 1 and a control signal for designating the dwelling unit 2 selected by the selection means (described later) of the lobby intercom 1 A pair line is used for each of the lines Lc. That is, the transmission line of the illustrated example uses three pairs of pair wires. Here, the video signal transmitted through the video line Lb is frequency-modulated by the lobby intercom 1 and is demodulated by the video processing unit 12 provided in each dwelling unit 2 and displayed on the monitor unit 13 as will be described later. . However, it is also possible to configure the transmission line with two pairs of lines by multiplexing audio signals and video signals having different frequencies and transmitting them through the same pair lines.

  The lobby intercom 1 includes a control unit 60 having a CPU as a main component, a control signal transmission / reception unit 61 serving as an interface between the control unit 60 and the control line Lc, a microphone 62 and a speaker 63 for inputting / outputting sound, and a microphone 62. And a speaker processing unit 65 connected to the speaker 63 via amplifiers 64a and 64b, respectively, and a communication line 65 connected to the call processing unit 65 via amplifiers 64c and 64d. A two-line four-line conversion unit 66 that converts the line La to two-line four-line, a TV camera 67 that images a visitor, and a video signal obtained by frequency-modulating an image captured by the TV camera 67 via a video line Lb The video processing unit 68 to be output to the control device 3 and the operation switches including number keys and call buttons are provided, and the operation input of each operation switch is output to the control unit 60. That includes an operation section 69, the visitor will be selected the dwelling unit 2 corresponding to the dwelling unit number by operating the call button after selecting the dwelling unit number of the visited by operating the number key. Here, a simultaneous broadcasting device (alarm monitoring panel) 5 is connected to the lobby intercom 1 via the communication line La and the control line Lc, and the dwelling unit number selected on the lobby intercom 1 is alerted via the control line Lc. When transmitted to the monitoring board 5, the alarm monitoring board 5 sends a control signal (call command) to the dwelling unit 2 corresponding to the dwelling unit number via the control line Lc.

  On the other hand, the dwelling unit 2 includes a microphone 21 and a speaker 22 that input and output audio, and the microphone 21 and the speaker 22 are connected to the call processing unit 24 via amplifiers 23a and 23b, respectively. Also connected to the call processing unit 24 is a two-wire / four-wire conversion unit 25 for converting the transmission paths on the reception side and the transmission side and the two-line communication line La into two-wire / four-wires through amplifiers 26a and 26b. ing. The call processing unit 24 compares the level of the voice signal (received signal) transmitted via the call line La and the level of the voice signal (transmitted signal) output from the microphone 21 to compare the call state (received state or transmitted state). When a call state is estimated, a loss is inserted into the transmission path of the transmission signal, and when a transmission state is estimated, a loss is inserted into the transmission path of the reception signal. And an echo canceler for eliminating acoustic echo generated by acoustic coupling between the microphone 21 and the speaker 22. However, since such voice switches and echo cancellers are well known in the art, detailed illustration and description of the configuration and operation are omitted. Therefore, an audio signal can be exchanged between the lobby intercom 1 and the dwelling unit 2 through the communication line La. A visitor uses the lobby intercom 1 and a resident uses the dwelling unit 2 so that the visitor and the residence Voice calls can be made with a person.

Also the dwelling unit 2, one of the branch lines L2 _1, L2 ₂ alternatively to switch connected to each speech signal connected branch lines L2 ₁ or L2 ₂ call line La and the video line Lb (the received signal And a transmission interface (hereinafter referred to as “speech path”) and a video signal transmission path (hereinafter referred to as “video path”). The video path is connected to the video processing unit 12, and the call path is connected to the call / broadcast switching unit 15. The call / broadcast switching unit 15 selectively switches between a state where the speech path connected to the trunk interface unit 14 is connected to the speech path switching unit 16 and a state where the speech path is connected to a volume correction unit 30 which will be described later. It is. Further, the communication path switching unit 16 is the same as the state in which the communication path connected to the two-wire / four-line conversion unit 25 is connected to the telephone / broadcast switching unit 15 and the state in which the communication path is connected to the handset interface unit 18 described later. It selectively switches between a state where it is connected to another dwelling unit (not shown) installed in the dwelling unit.

  The door phone slave unit 6 is connected to the slave unit interface unit 18 connected to the speech path switching unit 16 via the slave unit connection line L3. The door phone sub-unit 6 is disposed at the entrance of each dwelling unit of the apartment house and includes a microphone and a speaker. Therefore, when the communication path switching unit 16 switches the communication path connected to the two-wire / four-line conversion unit 25 to a state in which the communication path is connected to the sub unit interface unit 18, the intercom unit 6 and the dwelling unit 2 are connected. A call is possible. Also, the door phone slave unit 6 is provided with a television camera, and the slave unit interface unit 18 separates the audio signal and the video signal transmitted via the slave unit connection line L3, and transmits the separated video signal via the video path. It can be output to the video processing unit 12 and displayed on the monitor unit 13. Furthermore, the door phone sub unit 6 is provided with a call button, and has a function of sending a call signal to the sub unit connection line L3 when the call button is operated, and the dwell unit 2 has a notification sound when the call signal is detected. The ringing tone generated by the generation unit 27 is transmitted from the speaker 22.

  In the dwelling unit 2, a liquid crystal display or a CRT is used for the monitor unit 13. The video signal input to the dwelling unit 2 through the video line Lb is balanced-unbalanced converted by the main line interface unit 14, further amplified by an amplifier, and then frequency demodulated by the video processing unit 12. The video signal input to the dwelling unit 2 through the slave unit connection line L3 is also balanced-unbalanced converted by the slave unit interface unit 18, further amplified by an amplifier, and then frequency-demodulated by the video processing unit 12. The video signal output from the video processing unit 12 is input to the monitor unit 13, thereby displaying a video on the screen of the monitor unit 13. That is, since the image of the visitor imaged in the lobby intercom 1 or the TV camera 67 of the door intercom unit 6 is displayed on the monitor unit 13 of the dwelling unit 2, the resident in the dwelling unit can confirm the visitor. It is.

In addition, the notification sound generation unit 27 generates a notification sound for notification of a call from the lobby intercom 1 or the door phone slave unit 6 and outputs the generated notification sound to the speaker 5 via the amplifier 28a and the notification sound. Is output as a back tone to the branch lines L2 ₁ and L2 ₂ or the slave unit connection line L3. That is, the back tone transmission path switching section 17 is connected to the notification sound generation section 27 via the amplifier 28b, and the back tone transmission path switching section 17 determines the transmission destination of the back tone as branch lines L2 ₁ and L2 ₂ . It is switched alternatively to the slave unit connection line L3.

  The dwelling unit 2 includes a main control unit 10 that controls the internal circuit with a CPU as a main component. The main control unit 10 includes a control signal transmission / reception unit 11 serving as an interface with the control line Lc, and a response button (see FIG. And an operation unit 19 having a group of operation switches such as a broadcast button (not shown). The control signal transmission / reception unit 11 has a function of sending the control signal output from the main control unit 10 to the control line Lc and delivering the control signal received from the control line Lc to the main control unit 10.

Incidentally, the branch line L2 _1, L2 ₂ is branched via the splitter 7 from the mains L1 _1, L1 _2, in the trunk control apparatus 3 is directly connected to the mains L1 _1, L1 ₂ of each system. Therefore, the control signal sent from the lobby intercom 1 is transmitted to all the dwelling units 2 connected to the control line Lc. Here, an address (for example, a dwelling unit number) is individually set in the main control unit 10 of the dwelling unit 2. By selecting an address in the lobby intercom 1, a control signal (call command) for designating the address is sent. It is possible to transmit from the alarm monitoring panel 5 to all the dwelling units 2 via the control line Lc. If the address included in the control signal is its own address, the main control unit 10 of the dwelling unit 2 activates the video processing unit 12 and the monitor unit 13 to display the video of the visitor captured by the camera of the lobby intercom 1 The notification sound (calling sound) generated by the notification sound generation unit 27 is transmitted from the speaker 22 while being displayed on the monitor unit 13 of the machine 2. Then, the response buttons resident in response to the call tone has the operation unit 19 of the dwelling unit 2 if press operation, one of the main line L1 ₁ or L1 ₂ main control unit 10 controls the trunk interface unit 14 The connection is switched and the call / broadcast switching unit 15 is controlled to switch the communication path connected to the main line interface unit 14 to the state where the communication path switching unit 16 is connected, and the communication path switching unit 16 is controlled to control the two lines. The communication path connected to the four-wire conversion unit 25 is switched to a state in which it is connected to the call / broadcast switching unit 15 to establish a communication path via the trunk line L1 ₁ or L1 ₂ with the lobby intercom 1. By doing so, it is possible to make a call only between the lobby intercom 1 and the selected dwelling unit 2, and monitor visitors 1 captured by the TV camera only in the selected dwelling unit 2. It is possible to display on. When the dwelling unit 2 selected in the lobby intercom 1 establishes a communication path with the lobby intercom 1, the end of the call using an appropriate operation button is detected in the lobby intercom 1 or dwelling unit 2. Then it ends.

  When the call button of the door phone slave unit 6 is pressed and a call signal is sent to the slave unit connection line L3, the main control unit 10 of the dwelling unit 2 that has detected the call signal causes the video processing unit 12 and the monitor unit 13 to detect the call signal. Is displayed on the monitor unit 13 of the dwelling unit 2 and the notification sound (calling sound) generated by the notification sound generation unit 27 is output from the speaker 22. Send it out. When the resident presses the response button of the operation unit 19 of the dwelling unit 2 in response to the ringing tone, the main control unit 10 controls the speech path switching unit 16 to connect to the 2-wire 4-wire conversion unit 25. The communication path between the doorphone slave unit 6 and the dwelling unit 2 can be communicated by switching the communication path thus established to a state where it is connected to the slave unit interface unit 18 and establishing a communication path with the doorphone slave unit 6. It is possible to display the visitors imaged by the television camera on the monitor unit 13.

The alarm monitoring panel 5 includes a control unit 50 having a CPU as a main component, a control signal transmission / reception unit 51 serving as an interface between the control unit 50 and the control line Lc, a telephone handset (handset) 52, and a transmission Amplifiers 53a and 53b for amplifying signals and received signals, a two-wire four-wire converter 54 for converting two transmission lines and two transmission lines on the reception side and transmission side, and two communication lines La, and a handset 52 A state in which the transmission path is connected to the call line La via the 2-wire 4-line conversion unit 54, a state where the transmission path is connected to the call line La via the amplifier 56 without passing through the 2-wire 4-line conversion unit 54, and the call line La Either a call / broadcast switching unit 55 that switches to a disconnected state or a two-line communication line La connected to the main line control device 3 is selected as the two-wire / four-wire conversion unit 54 and the amplifier 56. Call line switching unit 57 for switching connection A broadcast call line switching unit 58 for selectively switching and connecting one of the two lines of the call line La connected to the main line control device 3 to the input side of the amplifier 56, and a call connected to the lobby intercom 1 There is provided a lobby call / broadcast switching unit 59 that selectively switches the line La between a state in which the line La is connected to one of the two communication lines La and a state in which the line La is not connected to any of the call lines La. Although not shown, the alarm monitoring panel 5 is provided with a number key for designating a dwelling unit number and a selection means having a call button, and an administrator operates the number key to select any dwelling unit number. If the dwell unit 2 corresponding to the dwelling unit number is selected by operating the call button after selection, a communication path is formed between the selected dwelling unit 2 and only the dwelling unit 2 is connected to the dwelling unit 2 by the handset 52. You can make a call. Controller 50 of the alarm monitoring panel 5 also includes trunk L1 ₁ of the two systems, L1 ₂ of usage constantly monitors the number for specifying the main line L1 ₁ or L1 ₂ to now used (hereinafter, "main line designated number Is included in the control signal (calling command) transmitted from the lobby intercom 1 and transmitted from the control signal transmitting / receiving unit 51 to the dwelling unit 2. Therefore, in the dwelling unit 2 selected as the lobby intercom 1, the main control unit 10 controls the trunk interface unit 14 to switch and connect to the trunk line L1 ₁ or L1 ₂ designated by the trunk designation number included in the control signal. Can do.

In addition, when broadcasting from the alarm monitoring panel 5 to all the dwelling units 2, a control signal (simultaneous broadcasting start command) instructing the start of the broadcasting from the alarm monitoring panel 5 is sent to each dwelling unit via the control line Lc. Sent to the machine 2. Further, in the alarm monitoring panel 5, the control unit 50 controls the call / broadcast switching unit 55 to connect the transmission path of the handset 52 to the call line La via the amplifier 56 without passing through the 2-wire 4-wire conversion unit 54. In addition, the communication line switching unit 57 is controlled to switch and connect to the communication line La of one of the trunk lines (for example, the trunk line L1 ₁ ). In each dwelling unit 2 that has received the control signal (broadcast start command), the main control unit 10 controls the main line interface unit 14 in accordance with the broadcast start command, and is designated by the main line designation number included in the broadcast start command. while switching connections to the main line L1 ₁ has, between the alarm monitoring panel 5 by switching the communication path which is connected to the trunk interface unit 14 controls the call / broadcast broadcasting switching unit 15 to a state that connects to the sound volume corrector 30 A broadcast channel audio signal (hereinafter referred to as a “broadcast audio signal”) transmitted from the alarm monitoring panel 5 is transmitted to each dwelling unit 2 via the communication line La. In each dwelling unit 2, the volume correction unit 30 automatically corrects the volume of the broadcast audio signal, and the volume-corrected broadcast audio signal is sent from the speaker 22.

  FIG. 2 is a block diagram showing a specific configuration of the volume correction unit 30. The volume correction unit 30 in the present embodiment includes a delay unit 31 that delays the broadcast audio signal, a variable amplifier 32 that amplifies the broadcast audio signal delayed by the delay unit 31, and a simultaneous input to the delay unit 31. An audio power estimation unit 33 that estimates the audio power (sound pressure level) of the broadcast audio signal, and an amplification degree G of the variable amplifier 32 according to the audio power of the broadcast audio signal estimated by the audio power estimation unit 33 And an amplification degree adjustment unit 34 that adjusts. The volume correction unit 30 in the present embodiment is realized by controlling the hardware of a DSP (digital signal processor) together with the call processing unit 24 and the notification sound generation unit 27 by software, but is not limited thereto. However, a CPU may be used instead of the DSP, or an analog circuit or a digital circuit may be used.

  The voice power estimation unit 33 is configured by an integration circuit or a digital filter having a characteristic that the rise is gradual and the fall is steep, and the initial (t = 0 to t1) simultaneous as shown in FIG. The long-term average value of the signal level of the broadcast audio signal is set as the audio power estimated value Pn. The amplification degree adjustment unit 34 is based on the difference between the voice power estimation value Pn output from the voice power estimation unit 33 and the voice power reference value, and the amplification degree G necessary to match the voice power estimation value Pn with the voice power reference value. And the amplification degree of the variable amplifier 32 is adjusted to the decided amplification degree G. Specifically, as shown in FIG. 3A, since the audio power of the broadcast broadcasting audio signal and the amplification degree G are in a proportional relationship (the proportionality factor is negative), the audio is based on a relational expression given in advance. The amplification degree G can be determined from the power estimated value Pn. Therefore, regardless of the transmission loss due to the wiring length from the alarm monitoring panel 5 to the individual dwelling units 2 or the number of dwelling units 2 to be broadcasted simultaneously, as shown in FIG. The volume of the broadcast audio signal can be corrected by the volume correction unit 30 to fall within the predetermined range X.

  Thus, depending on the size of the housing complex, the length of the transmission line from the simultaneous broadcasting device to each dwelling unit may range from several hundred meters to several kilometers, and the number of connected dwelling units and trunk line equipment (shared) As the number of mobile devices and broadcast equipment varies depending on the size of the housing complex, the transmission loss of the transmission line due to the impedance of the wiring, dwelling unit, and trunk line equipment also worsens, and the volume of the broadcast in the dwelling unit decreases. However, there is a risk that the volume of sound varies between the dwelling units. According to the present embodiment, each dwelling unit 2 includes the volume correction unit 30 that corrects the volume of the simultaneous broadcast to a value within a predetermined range. Therefore, without adjusting the amplification degree of the audio signal for broadcasting by the broadcasting device (alarm monitoring panel 5) according to the number of the housing units 2 to be broadcasted and the wiring length to each of the housing units 2, Multiple dwelling units It is possible to suppress the variation in the volume of simultaneous broadcast in between.

By the way, in this embodiment, simultaneous broadcasting can be performed not only from the alarm monitoring panel 5 but also from the dwelling unit 2. For example, a case where simultaneous broadcasting is performed from the dwelling unit 2A to a plurality of other dwelling units 2B,... Will be described. When the broadcast button of the operation unit 19 of the dwelling unit 2A is pressed, the main control unit 10 sends a control signal (broadcast start request command) including the dwell unit numbers of the dwelling units 2B,. The signal is transmitted from the control signal transmitting / receiving unit 11 to the alarm monitoring panel 5 via the control line Lc. The main control unit 10 controls the main line interface unit 14 to switch to one of the main lines (for example, the main line L1 ₁ ) and controls the call / broadcast switching unit 15 to connect to the main line interface unit 14. The communication path is switched to a state where it is connected to the communication path switching unit 16, and the communication path switching unit 16 is further controlled to transfer the communication path connected to the two-wire / four-line conversion unit 25 to the call / broadcast switching unit 15. Switch to the connected state.

On the other hand, in the alarm monitoring panel 5 that has received the control signal (broadcast start request command), the control unit 50 controls the call line switch unit 57 and the broadcast line switch unit 58 to switch the call line La of _one trunk line L11. the simultaneous broadcast call line switching unit 58, amplifier 56, through the call line switching section 57 is connected to the other main line L1 ₂ call line La.

Another dwelling unit 2B which has received the control signal (simultaneous broadcast start request command), the ..., with is switched for connection to the other of the main line L1 ₂ main control unit 10 controls the trunk interface unit 14, the call / broadcast The broadcast switching unit 15 is controlled to switch the communication path connected to the main line interface unit 14 to a state in which it is connected to the volume correction unit 30. As a result, a communication path is established between the dwelling unit 2A and the other dwelling units 2B,... Via the trunk line control device 3 and the alarm monitoring panel 5, and 2 broadcast broadcast audio signals are sent from the dwelling unit 2A. It is transmitted to the other dwelling units 2B,... Via the communication lines La of the trunk lines L1 ₁ and L1 ₂ of _one system. In the other dwelling units 2B,..., The volume of the broadcast broadcasting audio signal is automatically corrected by the volume correction unit 30, and the volume-corrected simultaneous broadcasting audio signal is transmitted from the speaker 22 and from the dwelling unit 2A. Simultaneous broadcasting is performed to the other dwelling units 2B,.

  In order to end the broadcast, it is only necessary to press the broadcast button on the operation unit 19 again with the dwelling unit 2A. When the broadcast button is pressed, a control signal (broadcast end command) instructing the end of the broadcast is transmitted to the other dwelling units 2B,... Via the control line Lc. In the other dwelling units 2B,... That have received the control signal, the main control unit 10 stops the operation of the volume correction unit 30 in response to the broadcast end command, and controls the call / broadcast switching unit 15 to control the trunk line interface. The speech path connected to the unit 14 is switched to a state where it is connected to the speech path switching means 16 and the standby state is returned.

Here, one of lines of the mains L1 ₁ or L1 ₂ simultaneously a plurality of dwelling units machine 2A, 2B, if ... are connected, other dwelling unit from dwelling unit 2A via the trunk line L1 ₁ or L1 ₂ It is also possible to broadcast to 2B,. However, if the alarm monitoring panel 5 is not involved in simultaneous broadcasting between the dwelling units ₂ , the probability that the main lines L1 ₁ and L1 ₂ will be occupied by the simultaneous broadcasting of each dwelling unit in the apartment house without permission. For example, there is a possibility of hindering an individual call with the lobby intercom 1 or an emergency broadcast by the alarm monitoring panel 5. Therefore, in the present embodiment, as described above, the simultaneous broadcasting between the dwelling units 2 is always performed via the alarm monitoring panel 5, and when performing emergency broadcasting or the like by the alarm monitoring panel 5, the telephone line The switching unit 57 and the broadcast broadcast line switching unit 58 are controlled to disconnect the trunk lines L1 ₁ and L1 _{2 so} that the broadcast between the dwelling units 2 can be forcibly stopped.

  Next, the operation in the case where the alarm monitoring panel 5 starts simultaneous broadcasting during an individual call between the dwelling unit 2 and the lobby intercom 1 will be described.

For example, through one of the trunk line L1 ₁ when receiving a control signal (simultaneous broadcasting starting command) from the alarm monitoring panel 5 when the lobby intercom 1 and dwelling unit 2 and are individually call, the control unit of the dwelling unit 2 10 controls the video processing unit 12 to display characters (for example, “broadcast”) on the monitor unit 13 to indicate that the broadcast is started, and also controls the notification sound generator 27 to start the broadcast. A notification sound for notifying that is generated and transmitted from the speaker 22. When the response button of the operation unit 19 is pressed, the control unit 10 ends the individual call with the lobby intercom 1 and enters a position to receive a broadcast from the alarm monitoring panel 5. Specifically, while switching connections to the control unit 10 is main line L1 ₂ other controls the trunk interface unit 14, the connected communication path and controls the call / broadcast broadcasting switching unit 15 to the trunk interface unit 14 The state is switched to a state in which the sound volume correction unit 30 is connected. The control unit 50 of the alarm monitoring panel 5 transmits a control signal (broadcast start command) and then controls the call / broadcast switching unit 55 to change the transmission path of the handset 52 to the two-wire / four-wire conversion unit 54. The main line L1 _{2 of the} other system that is not used for the individual call between the dwelling unit 2 and the lobby intercom 1 is controlled by switching to the state in which it is connected to the call line La via the amplifier 56 without being routed. To the call line La. As a result, a communication path is established between the lobby intercom 1 and the dwelling unit 2 and the alarm monitoring panel 5 that were in an individual call, and the broadcast broadcast audio signal sent from the alarm monitoring panel 5 is transmitted to one system. transmitted via the trunk line L1 ₂ call line La to each dwelling unit 2 is transmitted from the speaker 22 after being volume correction in sound volume corrector 30. If the response button is not pressed, the control unit 10 of the dwelling unit 2 continues the individual call with the lobby intercom 1, and when the response button is pressed, the alarm monitoring panel 5 already broadcasts. If the control signal (broadcast end command) has been received from the alarm monitoring panel 5, the process returns to the standby state.

Here, the trunk line interface unit 14 can individually switch and connect the call line La and the video line Lb for the trunk lines L1 ₁ and L1 ₂ of each system, and the alarm monitoring panel during the individual call with the lobby intercom 1 If 5 enters poised to receive the broadcast simultaneously by the control unit 10 of the dwelling unit 2 is switched for connection only call line La to the other main line L1 _2, used to separate call with the lobby intercom 1 for video line Lb and it remains connected to the main line L1 ₁ that was. As a result, in the dwelling unit 2, the broadcast broadcast sound from the alarm monitoring panel 5 is transmitted from the speaker 22, and the image captured by the television camera 67 of the lobby intercom 1 is continuously displayed on the monitor unit 13.

  Next, an operation when the dwelling unit 2 is called from the lobby intercom 1 during simultaneous broadcast reception by the alarm monitoring panel 5 will be described.

For example, when the dwelling unit number selected by the lobby intercom 1 is being transmitted to the alarm monitoring panel 5 via the control line Lc when the broadcast by the alarm monitoring panel 5 is received via _one trunk line L11. The alarm monitoring board 5 sends a control signal (call command) to the dwelling unit 2 corresponding to the dwelling unit number via the control line Lc. If the address included in the control signal (calling command) is its own address, the main control unit 10 of the dwelling unit 2 activates the video processing unit 12 and the monitor unit 13 and is captured by the TV camera 67 of the lobby intercom 1. The video of the visitor is displayed on the monitor unit 13 of the dwelling unit 2, and the notification sound (calling sound) generated by the notification sound generation unit 27 is transmitted from the speaker 22. The resident who has listened to the broadcast can know that the call has been called from the lobby intercom 1 with the ringing sound transmitted from the speaker 22 and can check the visitor from the video displayed on the monitor unit 13. And if the response button of the operation part 19 is pushed by the resident, the control part 10 of the dwelling unit 2 will end the reception of the broadcast by the alarm monitoring panel 5 and be ready to make an individual call with the lobby intercom 1. enter. Specifically, while switching connections to the control unit 10 is main line L1 ₂ other controls the trunk interface unit 14, the connected speech path controlling the call / broadcast broadcasting switching unit 15 to the trunk interface unit 14 The communication path switching unit 16 is switched to a state of connection, and the communication path switching unit 16 is further controlled to switch the communication path connected to the two-wire / four-line conversion unit 25 to a state of connection to the communication / broadcast switching unit 15. As a result, a communication path via the trunk line L1 ₂ is established between the dwelling unit 2 selected as the lobby intercom 1 and the lobby intercom 1, and communication is possible only between the lobby intercom 1 and the selected dwelling unit 2. In addition, it is possible to display on the monitor unit 13 visitors captured by the television camera 67 of the lobby intercom 1 only in the selected dwelling unit 2.

  On the other hand, if the response button of the operation unit 19 is not pressed by a resident, the control unit 10 of the dwelling unit 2 continues to receive the broadcast by the alarm monitoring panel 5, but the video processing unit 12 also receives the broadcast. Since the video captured by the TV camera 67 of the lobby intercom 1 is continuously displayed on the monitor unit 13 for a certain period of time, the resident can view the video displayed on the monitor unit 13 while listening to the broadcast by the alarm monitoring panel 5. You can continue to check the state of visitors.

It is a system configuration figure showing an embodiment of the present invention. It is a block diagram of the sound volume correction | amendment part in the same as the above. (A)-(c) is operation | movement explanatory drawing of the sound volume correction | amendment part in the same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lobby intercom 2 Dwelling unit 3 Trunk line control device 5 Alarm monitoring panel 10 Control part 14 Trunk line interface part L1 ₁ , L1 ₂ trunk line L2 ₁ , L2 ₂ branch line La Call line

Claims (5)

The common unit installed at the common entrance of the apartment and capable of voice input and output, and the shared unit installed in each dwelling unit of the apartment and connected to each other via multiple transmission lines. When a visitor selects a selection means having a plurality of dwelling units that establish a communication path with a common unit device, and each dwelling unit installed in a common unit or a manager room of an apartment house Is connected via the transmission lines of the plurality of systems and is provided with a simultaneous broadcasting device that broadcasts audio to all or some of the dwelling units at once,
The transmission line of each system consists of a control line that transmits at least a control signal that is generated in accordance with the operation of the selection means and instructs the start of an individual call, and a signal line that transmits an audio signal.
The dwelling unit has a communication means for making a call with a common unit device via a signal line, a transmission line switching means for selectively switching and connecting to a transmission line of any system, and at least a broadcast sound. Based on the control signal transmitted via the control line, the individual call / broadcast switching means for selectively switching the state in which the signal line is connected to the call means and the state in which the signal line is connected to the speaker, Control means for controlling the transmission line switching means and the individual call / broadcast switching means, and the control means receives the control signal for instructing the start of the broadcast via the control line. To switch to a state in which the signal line and the transmission line are connected to the speaker,
When the control means of any dwelling unit transmits a control signal instructing the start of simultaneous broadcasting to the other one or more dwelling units via the control line, the control means of the other dwelling unit The transmission unit switching unit is connected to the other transmission lines except the transmission line that is selectively connected by the transmission line switching unit by the dwelling unit that has transmitted the start control signal, and the broadcast start control signal is transmitted. An intercom system for collective housing, in which broadcast audio transmitted from a dwelling unit is transmitted to other dwelling units via a plurality of systems of trunk lines and a simultaneous broadcasting device.   Each dwelling unit has a notification means for notifying the caller that the broadcast start control signal has been received during a call with the shared device, and a call continuation with the shared device when there is a notification by the notification means. Operation means for the caller to select broadcast reception alternatively, and the control unit of the dwelling unit can communicate with the common unit device when the broadcast reception is selected by the operation means. The intercom system for an apartment house according to claim 1, wherein the transmission line switching means is switched and connected to other transmission lines excluding the transmission line being used.   The shared device includes an imaging unit that images a visitor, the transmission line includes a video line that transmits a video captured by the imaging unit, and each dwelling unit displays a video transmitted via the video line. And a control unit of the dwelling unit displays the video transmitted from the shared device through the video line when the broadcast is selected by the operation unit. The intercom system for collective housing according to claim 2.   Each dwelling unit has a notification means for notifying the caller that a control signal for starting an individual call has been received from the shared device during the reception of the broadcast, and a continuous broadcast reception when there is a notification by the notification means. Operating means for the caller to selectively select the start of the individual call, and the control unit of the dwelling unit receives the broadcast when the individual call with the shared device is selected by the operation means The intercom system for an apartment house according to any one of claims 1 to 3, wherein the transmission line switching means is switched and connected to other transmission lines other than the transmission line used for the housing.   The shared device includes an imaging unit that images a visitor, the transmission line includes a video line that transmits a video captured by the imaging unit, and each dwelling unit displays a video transmitted via the video line. The control unit of the dwelling unit displays the video transmitted from the shared unit device via the video line on the display unit when selected by the selection unit of the shared unit device, and simultaneously displays the video transmitted from the shared unit device by the operating unit. 5. The collective housing intercom system according to claim 4, wherein the video transmitted from the shared device via the video line is continuously displayed on the display means even when continuation of broadcast reception is selected.

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