JP2002218073A - Television interphone brancher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a television interphone brancher capable of constructing a television interphone system by installing a small number of branchers per floor. SOLUTION: A main body 1 is constituted by an input terminal block 12 for inputting a call line, a picture line, and a signal line; an output terminal block 13 for wiring the call line, the picture line, and the signal line to transmit; a branch circuit which contains three pieces or over in each of the call line, the picture line, and the signal line in order to branch each of the call line, the picture line, and the signal line input from an input terminal in three directions or over; and a plurality of branch terminal blocks 14 which are connected to each branch circuit, and are provided for connecting the call line, the picture line, and the signal line input from the input terminal to a television interphone through the branch circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in a television intercom system for connecting and sending and connecting a telephone line, a video line, and a signal line which are installed in an apartment house, a building, or the like and are configured as a pair line. It relates to a turnout.

[0002]

2. Description of the Related Art Conventionally, when a TV intercom system is constructed in an apartment house or a building, a switch is used to connect a telephone line, a video line, and a signal line, which are configured as a pair line, and to send and wire the line. used.

In such a branching device, a one-way branching device for branching a connected communication line, video line, and signal line in one direction,
A two-way splitter that branches in the direction is used. For example, when a two-way splitter is used, a television intercom system as shown in FIG. 5 can be constructed.

In this apparatus, one trunk line L1 (communication line, video line, signal line) derived from a video control panel (not shown) and formed as a pair line is connected to a branching device 100 provided at an appropriate place in a building. Send wiring sequentially, and in each branching device 100,
Two branch lines L2 (communication line, video line, signal line) configured as a pair line are connected, and a television interphone 200 is connected to each branch line L2. In addition,
In the figure, reference numeral 300 denotes a video amplifier for amplifying the level of a video signal transmitted from a video control panel, whereby a video signal is transmitted to an upper floor without lowering the level. be able to.

FIG. 6 shows the structure of a branch circuit for branching a video line in two directions.
0 are built in, and a contact r is provided between each output terminal.
And a dummy terminator 111 composed of a resistor R and a capacitor C are connected in series. When the television unit 210 (included in the television intercom 200) is not connected to the output terminal of the contact r, the terminal r is turned on by operating a dip switch (not shown) to perform termination processing.

[0006]

In many cases, a building in which a system is to be constructed has 4 to 8 dwelling units per floor. It is necessary to install 2 to 4 units on one floor, and as the number of floors in a building increases, the number of installations increases, making it difficult to construct a system, and equipment and construction costs for system construction. There was also a problem in terms of cost.

[0007] Further, since it is necessary to install 2 to 4 units per floor, there is a problem that it is difficult to secure a mounting space in a pipe shaft in a building or a distribution board.

Further, since the above-mentioned termination processing is performed by manual operation of the dip switch, the termination processing has been forgotten. Further, when only the branch line is connected to the branch unit and the TV interphone is not connected to the end of the branch unit, the branch unit cannot determine the non-connection and does not know the necessity of the termination processing.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and enables a TV intercom system to be constructed with a small number of installations per floor, and for automatically terminating a branch circuit for a video line. It is intended to provide a turnout.

[0010]

According to a first aspect of the present invention, there is provided a branching unit for a television intercom according to the first aspect of the present invention, in which a communication line, a video line, and a signal line are input to a main body thereof. An input terminal block, an output terminal block for sending and wiring a communication line, a video line, and a signal line, and a communication line for branching each of the communication line, the video line, and the signal line input from the input terminal into three or more directions. A branch circuit which has three or more built-in lines each for lines, video lines and signal lines, and a telephone line, a video line and a signal line which are connected to each branch circuit and input from an input terminal through the branch circuit. And a plurality of branch terminal blocks provided for connection to the intercom.

In the branching device for a television intercom according to the second aspect of the present invention, four branch circuits are provided for each of the communication line, the video line, and the signal line, so that each of the branch circuits is provided with an input terminal. , Video lines, and signal lines are configured as four-branch devices that branch in four directions.

According to a third aspect of the present invention, at least one of the video line branch circuits has a contact and a dummy terminator connected in series between output terminals thereof, A configuration is provided in which a contact control means for turning on and off a contact is detected by detecting an energized state on the output side of the branch circuit for the video line.

According to a fourth aspect of the present invention, the contact control means includes a normally closed light M.
It was composed of OSFET.

According to a fifth aspect of the present invention, in the branch unit for a television intercom, a drain hole is provided at an appropriate position on a lower surface of the main body.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration example of a main body of a television intercom branch device of the present invention.

The main unit 1 includes an input terminal block 12 for inputting a communication line, a video line, and a signal line, an output terminal block 13 for sending and wiring a communication line, a video line, and a signal line. A plurality of branch terminal blocks 14 which are connected to a built-in branch circuit (described later) and are provided for connecting a communication line, a video line, and a signal line input from an input terminal to a television interphone (described later) through the branch circuit. (# 1- #
4) and dummy resistance switches SW1 to SW3. The functions of the dummy resistance switches SW1 to SW3 will be described later.

The branching circuit branches the communication line, video line and signal line input from the input terminal of the input terminal block 12 in three or more directions. In this case, the branch circuit 10 is used for video lines.
, A branch circuit 15 for a communication line, and a branch circuit 16 for a signal line, respectively.
# 4) are built in each of them. That is, the branching device of the present invention is configured to function as a four-way branching device that branches each of the communication line, video line, and signal line input from the input terminal in four directions.

Each of these branch circuits 10, 15, 16 has a configuration as shown in FIG. In the branch circuit 10 for video lines, T is a transformer for obtaining impedance matching between the output impedance of the video line branch terminal of the corresponding branch terminal block 14 and the video line terminal of the TV interphone. Is a resistor for improving noise resistance, C1 is a capacitor for attenuating DC power supplied together with a video signal from the video line input terminal of the input terminal block 12, and CO1 is
Reference numeral 1 denotes a coil for removing a noise component superimposed on a DC power supply.

In the branch circuit 15 for the communication line,
CO2 denotes a so-called video crosstalk preventing coil for preventing a video signal from a video line from being mixed into a communication line.

Here, there are four branch circuits 10 for video lines. Of these, the branch circuit 10 corresponding to the branch circuits 14 (# 1 to # 3) has a contact r between its output terminals.
And a dummy terminator 11 composed of a resistor R and a capacitor C are connected in series, and a contact r is a normally-closed type optical MOSFET constituting contact control means.
(M).

The contact r is connected to the dummy resistance switch S described above.
It is turned on and off in conjunction with the operation of W1 to SW3, and termination processing is performed when the contact r is closed. Further, the contact r is automatically turned on and off. That is, since the optical MOSFET (M) is a normally closed type, it is in a closed state in a non-energized state, but when the energization of the DC power supply DC on the output side of the branch circuit 10 is detected, that is, when the energized state is reached, It is determined that the television unit 21 (described later) is connected to the output terminal, and the contact r is turned on to open. As a result, even if the terminal processing is forgotten or a processing error occurs, the terminal processing can be accurately performed depending on the energized state of the output side of the branch circuit 10.

The main body 1 is usually used by attaching a protective cover. FIG. 3 shows a state in which the protective cover 17 is attached to the main body 1 as viewed from below. Main unit 1
Is fixed with screws so that the front surface (the surface on which the input terminal block 12 and the like are present) is oriented vertically with respect to the mounting surface such as a wooden board. The protective cover 17 is mounted so as to cover the front of the main body 1.
The locking claws N provided on the lower surface of the main body 1 are locked in two locking holes H provided on the lower surface of the main body 1, and then the upper side of the protective cover 17 is pressed toward the mounting surface. Snap-in mounting that does not use etc. is done. Reference numeral 18 denotes a through hole provided on the lower surface of the protective cover 17, and the through hole 18 allows six pair wires connected to the terminal blocks 12 to 14 to pass without difficulty. It is large. In addition, “h” indicates a drain hole provided on the lower surface of the main body 1, and here, one is provided at each of right and left locations. The water drain hole h prevents the inside of the main body 1 from being flooded even if dew condensation or water intrusion along the mounting surface occurs, and the branch circuits 10 and 15 built in the main body 1 are provided. , 16 and the like can be prevented from being damaged by flooding.

FIG. 4 shows an example of a main configuration of a television intercom system constructed using the television intercom branch device of the present invention. In this case, the branch unit A is the one in which the protective cover 17 is attached to the main body 1.

This is a switch A provided at an appropriate place in a building.
, One main line L1 (communication line, video line, signal line) derived from the video control panel 4 and configured as a pair line is sequentially sent and wired, and each branch A is connected to a branch configured as a pair line. Four lines L2 (communication lines, video lines, signal lines) are connected, and a television interphone 2 is connected to each branch line L2.

The TV intercom 2 comprises a TV unit 21 and an intercom unit 22.
The television unit 21 connects the video line among the branch lines L2, and the intercom unit 22 connects the communication line and the signal line among the branch lines L2.

A lobby intercom 5 with a camera is connected to the video control panel 4 via a transmission line L3 (communication line, video line, signal line) configured as a pair line. The alarm monitoring panel 6 is connected via the line L3.

Each of the intercom unit 22, the video control panel 4, the camera-equipped lobby intercom 5, and the alarm monitoring panel 6 of the TV intercom 2 is operated by a commercial power supply. DC power supply (24 VDC, 500 mA) supplied together with a video signal from the video control panel 4 through a video line
Works with

In this system, the TV intercom 2
Intercom communication can be performed between the alarm interrogation panel 6 and the alarm interrogation panel 6 and the lobby intercom 5 with a camera using a communication line and a signal line. 5, the interphone communication can be performed using the communication line and the signal line. Further, the video control panel 4 allows the video taken by the lobby intercom with camera 5 to be projected on the television unit 21 of the television intercom 2 through a video line.

[0029]

As can be understood from the above description, in the branching device for a television intercom according to the first aspect of the present invention, the main body thereof has a telephone line, a video line, and a signal line. A plurality of branch circuits each having at least three built-in circuits, and a plurality of branches provided for connecting the communication line, the video line, and the signal line input from the input terminal to the television interphone through the branch circuits. The provision of the terminal block makes it possible to construct a TV intercom system with a small number of installations per floor, thereby facilitating the construction of the system and reducing costs such as equipment and construction costs for the system construction.

Further, since a system can be constructed with a small number of installations per floor, it is easy to secure a space for installation in a pipe shaft in a building or a distribution board.

In the branching device for a television intercom according to the second aspect, four branch circuits are provided for each of the communication line, the video line, and the signal line, so that the communication line input from the input terminal is provided. , The video line and the signal line are each configured as a four-branch device that branches in four directions. Therefore, when the number of dwelling units per floor is four, the starting of the trunk line derived from the video control panel is one. Do it with books only, 1
The branching to all the dwelling units on the floor can be performed at one place, which is extremely convenient.

According to the third aspect of the present invention, at least one of the branch circuits for video lines has a contact and a dummy terminator connected in series between output terminals thereof. It is equipped with a contact control unit that detects the energized state on the output side of the video line branch circuit and turns the contacts on and off. The connection / non-connection state of the TV interphone can be determined based on the power supply state on the side, and the termination processing can be accurately performed.

In the branching device for a television intercom according to the fourth aspect, the contact control means may be a normally closed type light M.
Since it is composed of OSFETs, it is possible to control contacts inexpensively, and even if the terminal process is forgotten or a process error is detected, if the energization of the output side of the branch circuit is not detected, the TV interphone is determined to be unconnected. Then, by keeping the contacts closed, the termination processing can be performed accurately.

In the branching device for a television intercom according to the fifth aspect, since the main body is provided with a drain hole at an appropriate position on the lower surface of the main body, dew condensation or intrusion of water droplets along the mounting surface occurs. However, it is possible to prevent the inside of the main body from being flooded, and it is possible to prevent a branch circuit or the like built in the main body from being damaged by the flood.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration example of a main body of a television intercom branch device of the present invention.

FIG. 2 is a diagram illustrating an example of the configuration of each branch circuit for a video line, a communication line, and a signal line.

FIG. 3 is a diagram illustrating a state in which a protective cover is attached to a main body, viewed from below.

FIG. 4 is a diagram illustrating an example of a main configuration of a television intercom system constructed using the television intercom branch device of the present invention.

FIG. 5 is a diagram showing a TV intercom system constructed using a conventional TV intercom branch unit.

FIG. 6 is a diagram showing the configuration of a conventional branch circuit for video lines of a television interphone.

[Explanation of symbols]

 A: Branch unit for TV intercom 1 ... Main unit 2 ... TV interphone 10 ... Branch circuit (for video line) 11 ... Dummy terminator 12 ... Input terminal block 13 ... Output terminal block 14 ... Branch terminal block 15 ... Branch circuit (for speech line) 16 ... Branch circuit (for signal line) h ... Drain hole r ... Contact M ... Opto-MOSFET

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5C054 AA01 AA05 CC02 CD06 CH01 EA03 FA00 HA22 5K023 AA05 BB25 5K038 AA09 CC11 DD23

Claims (5)

[Claims] 1. A branching device installed in an apartment house, a building, or the like and used for a television intercom system for connecting and sending and connecting a communication line, a video line, and a signal line configured as a pair line, An input terminal block for inputting the communication line, the video line, and the signal line; an output terminal block for sending and wiring the communication line, the video line, and the signal line; and an input from the input terminal. In order to split each of the communication lines, video lines, and signal lines into three or more directions, three or more built-in branch circuits for the communication lines, video lines, and signal lines are connected to each branch circuit. And a plurality of branch terminal blocks provided for connecting the communication line, the video line, and the signal line input from the input terminal to the television interphone through the branch circuit. And the television intercom for the splitter. 2. The communication circuit according to claim 1, wherein four of said branch circuits are provided for each of a communication line, a video line, and a signal line. A splitter for a television intercom, wherein each splitter is configured as a four splitter for splitting each signal line in four directions. 3. The video circuit according to claim 1, wherein at least one of the branch circuits for video lines has a contact and a dummy terminator connected in series between output terminals thereof. A branch unit for a television interphone, comprising: a contact control unit that detects an energized state of an output side of a branch circuit for a line and turns on and off the contact. 4. The normally closed optical MOSF according to claim 3, wherein said contact control means is a normally closed optical MOSF.
A branch unit for TV intercoms composed of ET. 5. The branching device for a television intercom according to claim 1, wherein a drain hole is provided at an appropriate position on a lower surface of the main body.