JP2000069652A - Wiring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make switchable collectively by one switching device at least one wiring system by providing two wiring systems through the use of a comparatively small number of wiring members. SOLUTION: Joint boxes 22 are connected with a main line Lm, comprising single-phase three wires connected with a trunk breaker 11. Each joint box 22 has a connector, which is connected electrically with a neutral conductor N, and one voltage line L1 of the main line Lm and has another connector connected electrically with the neutral conductor N and another voltage line L2 of the main line Lm. An outlet 21 is connected with each connector. Switching devices 13a, 13b for switching the respective voltage lines L1, L2 are interposed respectively between the main trunk breaker 11 and the adjacent joint box 22 thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring system mainly used in an office wiring system.

[0002]

2. Description of the Related Art Generally, a wiring system shown in FIG. 5 or a wiring system shown in FIG. 6 is employed in an office wiring system. In the wiring system shown in FIG. 5, a main breaker 11 and a plurality of branch breakers 12 are provided in a distribution board 1, and a main line Lm connected to a load side of the main breaker 11 is branched via the branch breaker 12, and branched. Each branch line Lb
Is connected to the outlet 21 as appropriate. In recent years, a wiring system using a free access floor has become widespread with an increase in information devices used in an office, and a wiring space is often formed under the floor. It is considered that a wiring system using a free access floor can easily cope with a layout change or the like because the wiring can be routed freely according to the layout in the office. However, when the position of the outlet 21 is changed, the route for routing the wiring must also be changed, and eventually, it is necessary to provide many outlets 21 in the office. Further, when the wiring up to the outlet 21 is long, it is very troublesome to change the position of the wiring. In other words, although it is possible to cope with a change in the layout of the office, the construction work is troublesome. Therefore, in the past, wiring was often laid after the layout in the office was determined.

On the other hand, as shown in FIG.
A wiring system is conceivable in which a joint box 22 connected to the joint box 22 is appropriately installed at the time of construction, and an outlet 21 having a plug detachably connected to a connector provided in the joint box 22 is connected as necessary. I have.

[0004] That is, as shown in FIG. 7, this wiring system lays a main line Lm at the time of construction,
The branch line Lb to which the outlet 21 is connected is connected to the joint box 22 after the office layout is determined. With such a configuration, the joint box 22
Since the position is fixed, prior wiring can be performed at the time of construction, and when the layout is changed, the relatively short branch line Lb connected to the wiring device and the joint box 22 are connected.
By simply changing the connection relationship with the wiring, the wiring becomes easier to handle. Moreover, the main line Lm and the joint box 22
Are shipped pre-connected at the factory and are prefabricated. A plug 20 is provided on the branch line Lb, and the connection relationship can be easily changed by attaching and detaching the plug 20 and a connector 23 as a branch connection portion provided in the joint box 22. The outlet 21 has a built-in breaker. In this wiring system, a branch breaker is not required in the distribution board 1.

[0005] In a general free access floor, floor boards 3
1 is supported on a floor base by a column 32, and houses a main line Lm, a branch line Lb, and a joint box 22 using a space formed between the floor base and the floor plate 31 as a wiring space.

In the wiring system using such a joint box 22, the connection relationship between the connector 23 of the joint box 22 at an appropriate position and the plug 20 on the outlet 21 side can be changed even if the layout in the office is changed. It can be easily handled. Moreover, a cabtire cable is generally used for the branch line Lb connected to the plug 20 and can be routed relatively easily, so that it is easy to arrange the outlet 21 at a desired position. In addition, since the breaker is built in the outlet 21, there is an advantage that it is easy to collectively manage the connection system of the information devices in association with the breaker.

By the way, information devices used in offices include those that must be turned on even when people are not in the office, and those that are used only when people are in the office. The former is facsimile, LA
N servers and the like, and the latter includes personal computers and the like used by each of them. Hereinafter, the former is referred to as a continuous wiring system, and the latter is referred to as a service wiring system. In general, the office wiring system does not require power supply except during office hours, and it is desirable to stop power supply when no one is present. That is, by stopping the power supply to the office wiring system when not in use, it is possible to suppress wasteful power consumption due to forgetting to turn off the information device.

In the wiring system shown in FIG. 5, a structure shown in FIG. 8 or FIG. 9 can be considered to divide the system into a continuous wiring system and a service wiring system. The wiring system shown in FIG. 8 includes a main line Lm on the load side of the main breaker 11 in the distribution board 1.
Is divided into two systems, one of which is a continuous wiring system S1 and the other system is a working wiring system S2. The continuous wiring system S1 and the working wiring system S2 each have a branch breaker 12
Is provided. Since the service wiring system S2 needs to be opened and closed collectively, a switch 13 such as an electromagnetic contactor or a relay is inserted between the main breaker 11 and the branch breaker 12. The wiring system shown in FIG. 9 has a plurality of branch breakers 12 connected to a main breaker 11, and a switch 13 such as an electromagnetic contactor or a relay inserted into a branch line Lb connected to each branch breaker 12, respectively. It is. In this configuration, power can be supplied and stopped for each branch line Lb.

However, in the wiring system shown in FIGS. 8 and 9, as in the wiring system shown in FIG. 5, even if the layout can be changed, the work is troublesome. In addition, the outlets 21 of the continuous wiring system S1 and the office wiring system S2 are mixed in the office, and
Since the locations and the numbers of the wirings change depending on the layout, in order to make it possible to cope with the layout change at the same level as that of the wiring system shown in FIG. Requires the same number of branch breakers 12 as the wiring system shown in FIG. That is, the number of the branch breakers 12 becomes about twice, and as a result, there arises a problem that the distribution board 1 becomes large and the wiring system becomes complicated.

On the other hand, in the wiring system using the joint box 22 as shown in FIG. 6, in order to provide the continuous wiring system S1 and the service wiring system S2, a configuration as shown in FIGS. Can be The wiring systems shown in FIGS. 10 and 11 also use the same technology as the wiring systems shown in FIGS. That is, in the wiring system shown in FIG. 10, the main line Lm connected to the main breaker 11 is set to 2
It is separated into a system, and one is a continuous wiring system S1, and the other is a switch wiring 13 to be a working wiring system S2. In the wiring system shown in FIG. 11, the switch 13 is inserted into a part of the branch line Lb branched by the joint box 22, and the plurality of switches 13 are opened and closed collectively to open and close the work wiring system S2. It can be done in a lump.

[0011]

If the wiring system shown in FIGS. 10 and 11 is adopted, it is easy to cope with a layout change, but the wiring system shown in FIG. 10 is similar to the wiring system shown in FIG. The joint box 22 and outlet 2
1 is almost doubled.

On the other hand, in the wiring system shown in FIG. 11, since the switches 13 are provided between the joint box 22 and the outlets 21, the switches 13 for the number of the outlets 21 used as the work wiring system S2 are required. As a result, the number of switches 13 is increased, and the switches 13 are housed in a wiring space formed between the floor base and the floorboard, so that wiring work is complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a wiring system of two systems with a relatively small number of wiring members, and at least one switch with one switch. An object of the present invention is to provide a wiring system capable of opening and closing the wiring systems of a system at a time and facilitating wiring work.

[0014]

According to the first aspect of the present invention, there is provided a main breaker having a single-phase three-wire main line connected to a load side, a main line connecting portion connecting the main line, a neutral line of the main line, and one voltage. A joint box having a first branch connection electrically connected to the power line and a second branch connection electrically connected to the neutral line of the main line and the other voltage line; and a first branch connection. Having an outlet electrically connected to the main line via a branch line connected to the power supply and the second branch connection portion, and a switch for opening and closing at least one voltage line between the main breaker and the joint box. It is. According to this configuration, the two voltage lines of the single-phase three lines are treated as separate systems,
An outlet connected to the first branch connection and a second branch connection, wherein one voltage line is connected to the first branch connection and the other voltage line is connected to the second branch connection in the joint box; Can be treated as another wiring system. In addition, since at least one of the two voltage lines is opened and closed by the switch, the wiring system connected to the voltage line opened and closed by the switch can be opened and closed collectively. As a result, by using the joint box, it is possible to easily cope with a change in the layout. In addition, it is possible to perform wiring of two systems with wiring members of about one system, and collectively integrate one system of wiring as needed. It can be opened and closed.

According to a second aspect of the present invention, in the first aspect of the present invention, the switch is opened and closed by an external signal. According to this configuration, the switch can be remotely controlled regardless of the location of the switch.

According to a third aspect of the present invention, in the first or the second aspect of the present invention, two voltages of the main line are associated with the first branch connection portion and the second branch connection portion of the joint box and the outlet. A display unit is provided to indicate which of the lines the system is electrically connected to. According to this configuration, it is possible to easily recognize the system classification according to the display content of the display unit, and it is possible to reduce the possibility of erroneous connection.

According to a fourth aspect of the present invention, in the second or third aspect of the present invention, there is provided a power supply management unit for generating a signal corresponding to the presence or absence of a person in a use area of the electric equipment supplied with the one voltage line. When a signal corresponding to the absence of a person is generated from the power supply management unit, the switch provided on the one voltage line is opened. According to this configuration, since one wiring system is opened and closed by a signal corresponding to the presence or absence of a person, if this wiring system is used as a work wiring system, power supply to information devices used only during work is performed by the presence or absence of a person. The power supply to the office wiring system can be stopped when a person is absent, and the possibility of wasteful consumption of power can be reduced. Here, the power supply management unit that generates a signal corresponding to the presence or absence of a person is not limited to a sensor that detects whether or not a person is actually present, such as a human sensor. It is possible to determine the presence or absence of a person in the room based on the use state of the card key, it is also possible to associate the ON / OFF of the switch of the air conditioner with the presence or absence of a person, The time zone may be managed by a timer, and the switch may be opened and closed according to a time schedule.

According to a fifth aspect of the present invention, in the first to fourth aspects of the present invention, the switches are provided on each voltage line, and both switches are closed, and both switches are opened. And a state in which only one switch is closed. According to this configuration, the two wiring systems branched by the joint box can be used for both the continuous wiring system and the office wiring system. For example, if both switches are opened and closed together, two wiring systems can be used as the working wiring system. If only one switch is opened and closed, only that wiring system is used as the working wiring system.
The other wiring system can be used as a continuous wiring system if the switch is always closed. Alternatively, it is also possible to use only one system for the continuous wiring system by opening the switch in one wiring system and closing the switch in the other wiring system at all times. In this manner, the two wiring systems can be used in various forms depending on the combination of the open / close states of the switch.

According to a sixth aspect of the present invention, in accordance with the first to fifth aspects of the present invention, a free access floor having a double floor structure in which a floor plate is laid on the base floor via a wiring space,
The main line, the branch line, and the joint box are housed in the wiring space, and the outlet is exposed on an upper surface of a floor plate. According to this configuration, since the joint box is arranged using the free access floor, wiring can be performed without causing a wiring flood. In addition, the use of the joint box increases the degree of freedom in the position of the outlet, and can easily cope with layout changes.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment shown in FIG. 1, a switch 13 is connected to two voltage lines L1 and L2 of a main line Lm connected to a load side of a main breaker 11 in a distribution board 1.
a and 13b are inserted. Switches 13a, 13
Reference numeral b denotes an electromagnetic contactor or relay, which is individually opened and closed through control units 14a and 14b as power supply control units. Control units 14a, 14b
Is for controlling the switches 13a and 13b in response to an external signal. As the external signal, an output from the human sensor,
The use state of the card key, the operation state of the switch for operating / stopping the air conditioner, the time schedule managed by the timer, and the like can be used. Alternatively, dedicated switches provided outside the distribution board 1 are provided with switches 13a and 13b.
And a remote monitoring and control system for switching the switches 13a and 13b by directly connecting the switch to a load and using a signal transmitted by a time division multiplex transmission system to control a switch and a load. For example, a switch that opens and closes the switches 13a and 13b may be used. The remote monitoring and control system used here is, for example, a terminal device having a switch connected to a transmission control device serving as a master device and a branch connection of a plurality of terminal devices serving as slave devices on one signal line of a two-wire system. When the switch is operated, the terminal device transmits switch operation information to the transmission control device in synchronization with the transmission signal transmitted from the transmission control device, and then the transmission control device performs control according to the switch operation information. A signal is transmitted to another terminal to control a load connected to the other terminal. Therefore, if the switches 13a and 13b are used as loads, remote control of the switches 13a and 13b becomes possible.

The joint box 22 is connected to the main line Lm, and has one of the voltage lines L1 and L2, the neutral line N and the ground line G.
It has four connectors 23 to which three lines with ND are electrically connected. Further, the main line Lm is a single-phase three line, and in the internal wiring of the joint box 22, as shown in FIG. 2, a neutral line N, one of the voltage lines L1 and L2, and a ground line GND are paired. Connected to the connector 23. In the illustrated example, four connectors 23 are provided, two of which are connected to the voltage line L1, and the other two are connected to the voltage line L2. That is, in each connector 23, both voltage lines L1, L
2, so that 200 V cannot be taken out. By the way, the joint box 22 shown in FIG.
Has a rectangular parallelepiped case (see FIG. 7), and has a main line connecting portion 24 to which main lines Lm are connected at both end surfaces in the longitudinal direction. The main line connecting portion 24 has a so-called quick connection terminal structure,
When the core wire of the main wire Lm is inserted into the terminal hole formed in the main wire connection portion 24, the locking spring formed using a leaf spring elastically contacts the core wire, and the leading edge of the locking spring bites into the core wire, so that the electric power of the main wire Lm is reduced. Connection and retention are made. The two main line connecting portions 24 also received by the joint box 22 are connected to each other inside the joint box 22, and the two main lines L connected to the two main line connecting portions 24 are connected.
m are electrically connected. That is, one main line Lm is set to the main breaker 11 side, and the other main line Lm is set.
Can be used as feed wiring.

The connector 23 is connected to the joint box 22
Are provided on each side surface in the width direction of each of the two, two in total. Two connectors 23 on one side are connected to a voltage line L1, and two connectors 23 on the other side are a voltage line L2.
Connected to. Therefore, the left and right connectors 23 with respect to the main line Lm are connected to different voltage lines L1 and L2. That is, the connector 23 connected to one voltage line L1 functions as a first branch connection, and the connector 23 connected to the other voltage line L2 functions as a second branch connection. As described above, since the switches 13a and 13b are inserted into the respective voltage lines L1 and L2, the voltage applied to the two connectors 23 of each joint box 22 according to the opening and closing of the switches 13a and 13b. And non-application can be selected.

As described above, the power supply can be controlled by dividing the connector 23 provided in the joint box 22 into two systems while using only one system of a single-phase three-wire cable for the main line Lm. The wiring system can be divided into two systems without using many wiring members. In addition, it is possible to select between supply and stop of power to each wiring system by the switches 13a and 13b.
Each wiring system can be used as either a continuous wiring system or a service wiring system in accordance with the open / close state of a and 13b.

For example, when leaving the room, the switches 13a, 13b
If both are opened, the entire system is used as the work wiring system, and if only one is opened, only one system is used as the work wiring system and the remaining one system is used as the continuous wiring system. If both are kept closed, the entire system is used as a continuous wiring system.

The plug 20 is connected to the connector 23 of the joint box 22. One end of a branch line Lb made of a cabtire cable is connected to the plug 20, and the branch line L
Outlet 21 is connected to the other end of b. The outlet 21 has a built-in breaker, and this breaker functions as a branch breaker. The plug 20 is a so-called harness plug having a lock body, and has a structure in which the plug 20 is locked so as not to come off from the connector 23 when connected to the connector 23 of the joint box 22.

Since the outlet 22 includes a continuous wiring system and a service wiring system, as shown in FIG.
Display units 2a and 2 for distinguishing between a continuous wiring system and an office wiring system
It is desirable to provide b. It is desirable that the display units 2a and 2b have the entire casing colored in different colors. For example, in the continuous wiring system, a color such as ivory or light gray (FIG. In the working wiring system, a color such as black (shown by oblique lines in the figure) may be used. When each connector 23 of the joint box 22 is fixedly used as a continuous wiring system and an office wiring system,
Since it is possible to display in advance whether the wiring system is a continuous wiring system or an office wiring system, it is preferable to provide the display units 3a and 3b in the joint box 22 similarly to the outlet 21. The display units 3a and 3b may be distinguished from the continuous wiring system and the service wiring system by colors and numbers.

In the example described above, the single-phase three-wire power supply lines L1,
The switches 13a and 13b are provided in L2, respectively.
As shown in FIG. 4, the switch 13 is connected to only one power line L1.
And a control unit 14 for opening and closing the switch 13 may be provided. In this case, only the outlet 21 connected to the electric wire L1 can be used as a service wiring system.

[0028]

According to the first aspect of the present invention, a main breaker having a single-phase three-wire main line connected to the load side, a main line connecting portion connecting the main lines, a neutral line of the main line, and one voltage line are connected to the main circuit breaker. Box having a first branch connection part, a second branch connection part electrically connected to the neutral line of the main line and the other voltage line, a first branch connection part and a second branch An outlet electrically connected to the main line via a branch line connected to the connection portion; and a switch for opening and closing at least one voltage line between the main breaker and the joint box. Treat the two voltage lines of phase 3 as separate systems, connect one voltage line to the first branch connection in the joint box, and connect the other voltage line to the second
The outlet connected to the branch connection portion, the outlet connected to the first branch connection portion and the outlet connected to the second branch connection portion can be treated as separate wiring systems, and at least one of the two voltage lines Can be opened and closed by the switch, so that the wiring system connected to the voltage line opened and closed by the switch can be opened and closed collectively. As a result, by using the joint box, it is possible to easily cope with a change in the layout, and in addition, it is possible to perform two-system wiring with about one-system wiring member, and as necessary, one line.
This has the advantage that it is possible to open and close the wiring systems of the system at once.

According to a second aspect of the present invention, in the first aspect of the present invention, the switch is opened and closed by an external signal, so that the switch can be remotely controlled regardless of the location of the switch. Has the advantage of becoming

According to a third aspect of the present invention, in the first or second aspect of the present invention, two voltages of the main line are associated with the first branch connection portion and the second branch connection portion of the joint box and the outlet. A display unit is provided to indicate which of the lines is electrically connected to the system. The system can be easily recognized according to the display contents of the display unit, and the possibility of incorrect connection Can be reduced.

According to a fourth aspect of the present invention, in the second or third aspect of the present invention, there is provided a power supply management unit for generating a signal corresponding to the presence or absence of a person in a use area of the electric equipment supplied with the one voltage line. When a signal corresponding to the absence of a person is generated from the power supply management unit, the switch provided on the one voltage line is opened, and a signal corresponding to the presence or absence of a person opens and closes one wiring system. Therefore, if this wiring system is used as a work wiring system, power supply to information equipment used only during work can be switched on and off according to the presence or absence of people, and power supply to work wiring system when people are absent Is stopped to reduce the possibility of wasteful consumption of electric power.

According to a fifth aspect of the present invention, in the first to fourth aspects of the present invention, the switches are provided on each voltage line, and both switches are closed, and both switches are opened. And a state in which only one of the switches is closed, and the two wiring systems branched by the joint box are used for both the continuous wiring system and the working wiring system. There is an advantage that it becomes possible.

According to a sixth aspect of the present invention, in accordance with the first to fifth aspects of the present invention, a free access floor having a double floor structure in which a floor plate is laid on a base floor via a wiring space,
The main line, the branch line, and the joint box are housed in the wiring space, and the outlet is exposed on the upper surface of the floorboard.Since the joint box is arranged using the free access floor, wiring flooding may occur. It has the advantage that it can be wired without
The use of the joint box has the advantage that the degree of freedom of the outlet position is high and the layout can be easily changed.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.

FIG. 2 is an internal wiring diagram of a joint box used in the conventional example shown in FIG.

FIG. 3 is a schematic configuration diagram showing an example of a display unit in the above.

FIG. 4 is a schematic configuration diagram showing another example of the embodiment of the present invention.

FIG. 5 is a schematic configuration diagram showing a conventional example.

FIG. 6 is a schematic configuration diagram showing another conventional example.

FIG. 7 is a perspective view showing a specific configuration of the conventional example shown in FIG.

FIG. 8 is a schematic configuration diagram showing still another conventional example.

FIG. 9 is a schematic configuration diagram showing another conventional example.

FIG. 10 is a schematic configuration diagram showing another conventional example.

FIG. 11 is a schematic configuration diagram showing another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Distribution board 2a, 2b Display part 3a, 3b Display part 11 Main breaker 12 Branch breaker 13a, 13b Switch 14a, 14b Control unit 20 Plug 21 Outlet 22 Joint box 23 Connector 24 Main line connection part 31 Floor plate 32 Post L1, L2 Voltage line Lb Branch line Lm Main line N Neutral line

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toru Hanahara 1048 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. ) Inventor Tsunehiro Sato 26th Floor, Grand Park Tower, 3-4-1 Shibaura, Minato-ku, Tokyo Inside NTT Facilities Corporation (72) Hideo Nakagawa 26-1, Grand Park Tower 3-3-1 Shibaura, Minato-ku, Tokyo Floor: Inside NTT Facilities Co., Ltd. (72) Toshiyuki Murata 26th floor, Grand Park Tower, 3-4-1 Shibaura, Minato-ku, Tokyo Inside NTT Facilities Co., Ltd. (72) Inventor Mikihiko Nakayama Tokyo 3-4-1 Shibaura, Minato-ku Grand Park Tower 26F Company NTT FACILITIES, in the F-term (reference) 5G361 CA01 CA09 5G363 AA20 BA01 DB11 DB29

Claims (6)

[Claims] 1. A main breaker having a single-phase three-wire main line connected to a load side, a main line connecting part connecting the main lines, a first neutral line electrically connected to a neutral line of the main line, and a first voltage line. A joint box having a branch connection portion and a second branch connection portion electrically connected to the neutral line and the other voltage line of the main line, and a joint box connected to the first branch connection portion and the second branch connection portion, respectively; A wiring system comprising: an outlet electrically connected to a main line through a branch line; and a switch for opening and closing at least one voltage line between the main breaker and the joint box. 2. The wiring system according to claim 1, wherein the switch is opened and closed by an external signal. 3. A system which is electrically connected to one of two voltage lines of a main line in association with a first branch connection portion and a second branch connection portion of the joint box and the outlet. The wiring system according to claim 1, further comprising a display unit for indicating. 4. A power supply management unit for generating a signal corresponding to the presence or absence of a person in a use area of an electric device supplied by one of the voltage lines, wherein a signal corresponding to absence of a person is generated from the power supply management unit. The wiring system according to claim 2, wherein the switch provided on the one voltage line is opened. 5. A state in which the switches are provided on each of the voltage lines and both switches are closed, a state in which both switches are open, and a state in which only one switch is closed. The wiring system according to any one of claims 1 to 4, wherein the wiring system is selectable. 6. A free access floor having a double floor structure in which a floor board is laid on a base floor via a wiring space, wherein the main line, the branch line, and the joint box are housed in the wiring space, and the outlet is provided. The wiring system according to any one of claims 1 to 5, wherein the wiring system is exposed on an upper surface of the floor panel.