JPH0223015A - Brancher for low voltage main line - Google Patents

Abstract

PURPOSE:To perform hot-line work easily only through rejoint of connectors by screwing the end section of a branch wire to a branch sleeve and providing a power source connector. CONSTITUTION:A branch sleeve 10 is connected integrally with sleeve members 10a, 10b from the opposite sides of a conductive wire 2 and secured by applying pressure from the outside. A screw hole 11 is made through the side section of the sleeve member 10a and the threaded section 16 of a power source side connector 15 is screwed therein thus providing a power source side connector 15 integral with the branch sleeve 10. The tip of the power source side connector 15 is projected from an insulating member 3 covering the branch section 5 and a protective cover 7 covering the surface of the insulating member 3 and connected with the connector 20 of a feeder line 21 through the projecting section of the power source side connector 15. By such arrangement, it can cope easily with increase of power demand by rejointing a feeder connector having different power conduction capacity.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a branching device used to supply power to each floor from a low-voltage main line installed in an electrical shaft of a building, etc., and in particular, to The present invention relates to a branching device for a low-voltage trunk line, in which a power supply side connector is provided integrally with the trunk cable in order to perform an operation of connecting a power supply line to the trunk cable.

(Prior Art) In buildings such as office buildings that use a large amount of electricity, flat cables with large capacity transmission lines and large power transmission capabilities are often used. When branching a power supply line from a low-voltage main line using a power line to each floor, a branching means as shown in, for example, Japanese Utility Model Application Publication No. 58-141574 is often used.

As the conventional branching means for the feeder line as described above, the first
A branch connection method as shown in FIG. 1 or FIG. 12 is used.

For example, as shown in FIGS. 11 and 11a,
In the case of using a method of connecting branch lines using a branch sleeve, the insulating member as a cover for the main cable is peeled off to expose the conductive wire, and the branch sleeve 10 is fixed to cover the exposed portion. The end of the branch wire is connected to a connecting plate 13 formed to protrude from the branch sleeve 10 to the side.

Apart from this, a connection method as shown in FIG. 12 may be used. In the connection method shown in FIG. 12, the insulating member of the trunk cable 1 is removed and the branch sleeve 10 is fixed to the exposed portion of the conductive wire 2. ! By also integrally attaching the conductor 19a of 119, the branch line 19 can be directly connected.

Then, by connecting the branch line through the branch sleeve as described above and insulating the periphery by wrapping insulation tape, etc., the work of fixing the branch line can be done as needed. I can do it.

As a method of connecting branch lines as described above, the example shown in FIG. 11 is often used, and in addition to the conventional example described above, for example,
There is an example as shown in Japanese Utility Model Application Publication No. 58-141573.

(Problem to be Solved by the Invention) However, in the conventional low-voltage main branch branch device as described above, the branch lines for supplying power to each floor of the building are Since it is provided according to the amount, in response to the recent OA etc.
0AII! When many i-devices are used, the amount of power used within the office space increases dramatically, causing problems such as the inability of conventional branch lines to meet the power demand.

Therefore, it is necessary to remove the small-capacity branch line fixed to the main cable from the main cable and reconnect it with a new large-capacity branch line. However, the branch line connected to the main cable as mentioned above is fixed in such a way that it cannot be easily removed, and for that work, it is necessary to use insulating tape, etc. that covers the conductive m2. The insulation material is removed, the branch sleeve at the connection part is removed, and a new high-capacity branch line is fixed.

However, the above-mentioned work cannot be carried out while the main cable is energized, and of course there will be a power outage during the work. In addition, as in an office building, whenever a tenant moves, the amount of electricity used on that floor changes, or the arrangement of OA equipment on each floor changes due to the movement of internal sections, etc. It is necessary to reconnect the power supply line with the same capacity to the main line.

Construction work to increase the capacity of the branch line cannot be carried out while the line is live, so naturally the work must be carried out on holidays, etc., but if a building has many floors, each floor In response to this, the number of branch lines to be installed increases, and in addition to requiring more manpower for construction, it also requires a lot of work, such as removing old branch lines, connecting new branch lines, and installing insulating materials on them. It is required to carry out troublesome construction work.

Furthermore, electric shafts in ordinary buildings are located in relatively narrow spaces, resulting in problems such as very poor working efficiency.

Instead of using a branch line from the main cable as described above, a branch line that is integrally provided in the cable body in a branched state is used, as shown in Japanese Patent Application Laid-Open No. 52-135081. It is also possible to do so.

However, such prefabricated cable units were developed as power supplies for lighting at construction sites or for hand-held tools, and the power supply capacity of the wires is 1000A or more. However, there are many problems in terms of cable flexibility and the like.

In other words, the number of sockets and plugs provided at branch parts of the main cable as shown in the above publication is
Even if it can withstand up to an A level, it can withstand several hundred A degrees.
If the capacity is , what is the configuration of the connection? !
! In addition to the weight of 3 tons, problems arise such as the volume occupied by the device at the connection portion becomes too large to be practical.

In addition, when a trunk cable with branched lines as described above is used as a trunk cable for power supply to a building, etc., a large number of the branched lines will be suspended inside the duct. Other drawbacks may occur, such as the installation work of the trunk cable becoming complicated.

(Object of the Invention) The present invention solves the drawbacks of the conventional low-voltage main line branching device as described above.The power supply side connector branching from the main cable is configured with a large capacity connector, and the By providing a connection part for the power supply, when responding to changes in power demand, it is possible to easily carry out construction work with a large capacity power supply line in a live state by simply connecting the connector. Furthermore, by providing a connector directly to the main cable, there are no branching members from the cable, and the cable can be easily handled. The purpose is to provide a device that

(Means and effects for solving the problems) The present invention has the following features:
The conductive wire of the main cable is exposed, and a substantially ring-shaped branch sleeve is integrally provided to cover the exposed portion of the conductive wire, and the end of the branch wire is connected to the branch sleeve by screwing or the like to supply power. This device is provided with a side connector and configured so that the connector of the supply 111 can be connected to the side connector.

The low-voltage main line branching device of the present invention peels off the insulating member of the main cable to expose the 'S electric wire, and integrally provides a substantially ring-shaped branching sleeve to cover the exposed portion of the conductive wire. A branch part is formed by covering the part with an insulating member and a protective cover, a power supply side connector is integrally provided in the branch part, and the power supply side connector is connected to the branch part with the insertion part of the load side connector exposed. It is covered with a protective cover, and the power supply side connector is placed parallel to the main cable.

Therefore, according to the low-voltage main line branching device of the present invention, even when rewiring is performed in response to the power demand on each floor, the connection to the main cable is simply made by connecting to the power supply side connector provided at the branch part of the main cable. On the other hand, since it is only necessary to insert the power supply line connector, it is possible to connect a large capacity power supply line to a live trunk cable without interrupting the power transmission.

By using the trunk cable of the present invention, the wiring change can be carried out during normal business hours, so there is no need to choose a holiday to carry out the work during a power outage.

Furthermore, in the low-voltage trunk line branching device of the present invention, the power supply side connector received by the conductive wire does not protrude significantly from the trunk cable, and is configured with fewer unnecessary protrusions in terms of appearance. This makes it easier to handle trunk cables when winding up and transporting cables, or when wiring inside buildings.

Furthermore, according to the low-voltage main line branching device of the present invention, even when wiring is done in response to the electricity and power demands of each floor within the pill, the work of connecting the power supply side cable to the main cable is easy. All you have to do is simply insert the power supply side connector into the power supply side connector installed at the branch of the trunk cable, and it is easy to interrupt the power transmission to the live trunk cable. A large capacity Ti supply line can be connected without any processing.

(Example) The configuration of a branching device for a low-voltage trunk line according to the present invention will be described according to an illustrated example. As shown in FIG. 1, the trunk cable 1 has a plurality of conductive wires (copper conductors) 2.2...
* are arranged in parallel and the periphery thereof is covered with an insulating member 3. In addition, this cable is a type of cable that is usually called a flat cable (for example, 60
If the wiring is three-phase AC, three similar cables are placed in parallel in the electrical shaft, and installed on each floor of the building. Power can be supplied from the trunk cable 1 to office automation equipment and the like via the branch section 5. Although the apparatus of the present invention may use a cable with a normal round cross section, in this embodiment, a case will be described in which a flat cable is used.

In the example shown in FIG. 1, when branching from the main cable 1 to the feeder line 21 of each floor, a branch part 5 provided at a predetermined location of the main cable 1 protrudes to the side. For the power supply side connector 15, the sleeve 1621
By connecting the connector 20, power can be supplied.

In this embodiment, for example, if the low voltage power supply of 600 V or less is a three-phase AC, three main cables 1 with branch parts 5 at the same position are installed in parallel, and three main cables 1 on the demand side are installed in parallel. The power supply lines will be connected to each other.

A load side connector (male connector) 23 provided at the terminal of the supply ffi line 21 wired to each floor is attached to the power supply side connector (female connector) 15 provided from the trunk cable 1 via the branch sleeve 10. By doing so, it is possible to create a state in which power can be easily supplied.

The branch section 5 of the present invention can be configured as shown in FIG. In the illustrated embodiment of the invention, the insulating member of the main cable 1 is stripped and the conductor is removed. 112
A substantially ring-shaped branch sleeve 10 is attached to the exposed portion.

This branch sleeve 10 is formed by combining two substantially U-shaped sleeve members 10a and 10b in a fitted combination, and the sleeve members 10a and 10b are inserted from both sides in the width direction of the conductive ta2. and the two members are fitted together by sliding the box-shaped fitting parts,
After performing that combination, for example,
Both sleeve members are connected together using a compression device for connecting electric wires as shown in Japanese Patent No. 46890, etc., and thereby the branch sleeve 10 is connected to the conductive wire.
I am trying to fix it.

That is, with the conductive wire 2 inserted into the insertion hole 11 in the center of the branch sleeve 1o of the present invention, pressure is applied to the branch sleeve 10 from the outside using the compression device as described above.

By performing such work, the branch sleeve 10 made of steel casting compresses the conductor inserted into each hole, and the branch sleeve is fixed in a state where it is electrically connected to the conductive IF wire. become able to do.

Further, in the branch sleeve 10 of the present invention, a screw hole 11 is provided on the side of one sleeve member 10a,
By screwing the threaded portion 16 of the power supply side connector 15 into this screw hole 11, the power supply side connector 15 can be provided integrally with the branch sleeve 10.

By causing the tip of the power supply side connector 15 to protrude from the insulating member provided to cover the branch portion 5 and the protective cover 7 provided to cover the surface of the insulating member, the M The connector 20 of the power supply 1121 can be connected via the protruding portion of the source side connector 15.

In another embodiment of the invention shown in FIG. 3, one branch 5 is provided for the main cable 1, but for that branch 5 two feeds II! A bifurcated member 25 is provided which connects to 21.21a.

When it is necessary to draw out multiple power supply lines from one branch, using the bifurcated member (Y branch connector) 25 as described above, even when there is only one power supply side connector, It is possible to configure so that power can be fed to two feeder lines.

In another embodiment of the invention shown in FIG.
A plurality of power supply side connectors 15.15a, 1 are connected to the branch part 5.
5b is provided so that separate system feeds 1121.21a and 21b can be connected to each power supply side connector.

When configuring a branch section as described above, three feeder lines from different systems can be connected to each power supply side connector, so even if the load systems are different, it is easy to It will be possible to carry out construction work on the power supply system.

As mentioned above, when three power supply side connectors are provided, three branch sleeves are fixed to one branch part and a power supply side connector is provided on each branch sleeve, or one It is possible to use any means such as attaching three power supply side connectors to the branch sleeve, but in any case, the branch sleeve It is necessary to set a large contact area with the conductive wire.

In the case of the above-mentioned configuration, compared to the two embodiments described above, there is more margin in the use of electricity on each floor, and subsequent work such as wiring changes can be easily carried out. becomes.

In the embodiment shown in FIG. 5, the capacity of the power supply side connector 15 provided in the branch part 5 is set large,
For example, even if the power supply side connector is set to 50OA, if the corresponding power supply line is only 20OA, the connector 20 can be connected via the reducer 27 to supply power.

In addition, if the power demand increases for that particular branch, the output side of the reducer 27 can be converted to a large capacity one to meet the demand on the large capacity feeder side. become.

In addition, in any case, a reducer can be interposed between the connectors at both ends as described above, and connector members configured with different current carrying capacities on the power supply side and the power reception side can be used. By using this, power can be fed from the branch line to the feeder line in good condition.

In addition, in the example shown in FIG. 5 above, one system of power supply lines is connected, but when two systems of power supply lines are connected to one power supply side connector, the example shown in FIG. It is possible to use the bifurcated member 25 having such a configuration. In the embodiment shown in FIG. 6, a bifurcated member 25 constructed similarly to that shown in FIG. 3 is used.

As described above, instead of providing the power supply side connector 15 so as to protrude at right angles to the main cable 1,
In the apparatus of the present invention, as shown in FIG. 71 or FIG. 9, a means for arranging the power supply side connector parallel to the main cable can be used.

In the embodiment shown in FIG. 7, the power supply side connector 15 is shaped like an abbreviation as shown in FIG.
a, screw the threaded portion 16 of the power supply side connector 158 into the threaded hole 11 of the branch sleeve 10,
The opening of the connector is rotated and fixed in a state parallel to the cable 1, and its outer periphery is covered with an insulating member such as an insulating tape and a protective cover.

Therefore, by inserting the connector 20 of the feeder line from a direction parallel to the cable 1, the connection operation can be easily performed with respect to the branch part 5a as shown in FIG. Become.

In another embodiment of the present invention shown in FIG. 9, the conductive wire 19a of the lead wire 19 is directly connected to the branch sleeve 10, and the lead wire is made very short to connect to the power supply side connector 15b. has been established. As shown in the figure, the branch part is covered with an insulating member 6 such as an insulating tape and a protective cover 7, and only the connector 15b is provided from the cover 7 to the opening of the power supply side connector. .

Therefore, even when the branch portion is configured as shown in FIG. 9, the connector on the load side (power feeder side) can be inserted from a direction parallel to the main cable 1.

As mentioned above, when the power supply side connector is provided parallel to the main cable, unlike the embodiment shown in FIG. The cable can be easily handled during winding, laying, etc.

Furthermore, as mentioned above, even when the power supply side connector is provided parallel to the cable, it is possible to provide the connector in the vertical direction of the branch part, or to interpose a reducer between it and the load side connector. It is possible to add any means as described above.

The connector shown in FIG. 10 is an example of one that can be used as a power supply side connector and a load side connector of the present invention. In this embodiment, although the symbols are different, the power supply side connector 15 shown in the above embodiment is indicated by the symbol 30, and the load side connector 20 is indicated by the symbol 40.

In the example of the connector shown in FIG. 10, the power supply side connector 30 is provided with a receptacle 31 in its center and a fixed cylinder 32 around the receptacle 31.
A rubber cover 35 is placed around it.

Further, an arc extinguisher 33 is provided on the open side of the fixed cylinder 32, and this arc extinguisher is made of a synthetic resin material with high insulation performance such as polyacetal resin, and is connected to the receiver 31 and the load side connector 40. When connecting and separating from the plug 41,
It is used to prevent the arc from affecting the surroundings when it occurs.

The load-side connector 40 provided to the connector 30 includes a plug 41 as described above, and the plug 41.
An arc extinguisher 43 protruding from the tip of the plug 41 and a freely rotatable screw member 44 are provided at the base of the plug 41, and a rubber cover 45 is provided to cover each of these members. .

Incidentally, the screw member 44 is formed of an insulator like the arc extinguisher, so it is constructed so that it can be directly touched by a worker or the like.

Note that an arc extinguisher 43 provided at the tip of the plug 41
The arc extinguisher 33 can be made of the same material as the arc extinguisher 33 provided in the connector 30, and the two arc extinguishers extinguish the arc when the receptacle and the plug come into contact with each other in a narrow gap. To prevent the arc from leaking outside.

When attaching the load side connector 40 to the power supply side connector 30, first, the arc extinguisher 43 at the tip of the plug 41 is inserted into the receptacle 31, and then
It acts as a guide for the sliding of the plug, and the plug 41 is inserted into the receptacle 31 due to its movement.

In the embodiment of the present invention, the power supply side connector 30 has a relationship between the distance L1 between the tip of the receptacle 31 and the insertion side tip of the cylinder 32, and the length L1 of the plug 41 of the load side connector, such that Ll>12. is formed. Therefore, while the plug 41 is inserted toward the receptacle 31, the arc extinguisher 4 provided at the tip of the plug 41 is inserted into the receptacle 31.
3 are engaged, and since both conductors are not directly connected, they are not energized.

After the plug is inserted in the above-described state, the screw member provided at the rear of the plug 41 is freely rotated relative to the plug body, and the screw member provided at the rear of the plug 41 is rotated freely relative to the female thread 34 provided at the tip of the cylindrical portion. During the operation of screwing in the screw member 44, the plug 41 is inserted into the receptacle 31, and both are set to be energized.

In addition, even if an arc occurs between the conductors when setting the energization state as described above, the arc will be extinguished inside the cylinder that is set in a sealed state, so it will not leak to the outside. This will be completely prevented.

Then, as described above, the screw member 44 is fixed to the inner part, and the energized state can be ensured. In addition, when attaching the connector described above, since the screw member 44 is provided so that it can freely rotate around the plug 41, even if the screw member 44 is rotated,
The load-side cable is not twisted, and only the plug is inserted deeply into the receptacle 31.

After the aforementioned connector fixing operation, the cover 45 of the load side connector 40 is moved relative to the fixing cylinder 32 so as to be in contact with the end of the power source side connector 30, and the two rubber covers 35 are moved. Seal the connection with .45.

Note that in the illustrated embodiment, the covers 35 and 45
is formed to have a slightly smaller diameter than the outer diameter of the cable and the fixed cylinder 32, and a ring-shaped groove is formed in the cover of the portion that slides on the cable 17 and the feeder line 21, respectively. 36 and 46 are provided,
By accommodating silicone grease in those grooves,
In addition to allowing the cover to slide well,
It is possible to obtain watertight performance in that part. Therefore, in the connector part of the present invention, by covering the periphery of the main body with a rubber cover, it is possible to completely seal the connection portion.

Furthermore, when applying a connector as shown in FIG. The connector body 30 can be replaced with a connector 15.15a as shown in FIG. 2 or 8.

In addition, for the trunk cable of the present invention as described above,
Although the work of installing branch sections can be done at construction sites, the cables are manufactured at a factory according to the specifications of the building, and the resulting cables are transported to the construction site, installed on the building's cable shaft, and installed on the load side of each floor. If the connectors are connected in sequence, the construction work on site can be greatly simplified.

In the embodiments of the present invention described above, an example has been described in which the connector on the load side can be easily connected to a flat cable often used in general office buildings, etc. The branching device of the present invention is not only applicable to flat cables as described above, but can also be similarly applied to cables having a general round cross section. .

In that case, the shape of the branch sleeve is configured to match the cross section of the cable, the branch connector is fixed to the cable by means such as crimping the branch sleeve together, and the cable is 31ill11
By providing the connector in a protruding manner, the branch portion can be easily formed.

(Effects of the Invention) Since the low-voltage main line branching device of the present invention has the above-described configuration, it can be produced in a factory with the power supply side connector integrally provided on the main cable, and -
Even if the power demand for a cable that has been installed in a building increases, it can be easily handled by reconnecting the connector of the power supply line with a different current carrying capacity to the Iagi side connector.

In addition, when changing the capacity of the feeder line on each floor, it is possible to sufficiently handle the change by simply connecting a large capacity feeder line without changing the branch sleeve for the trunk cable, etc. When making changes, work can be carried out even when the main cable is energized.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the configuration of a low-voltage main line branching device of the present invention, Fig. 2 is a perspective view showing the relationship between the branch sleeve attached to the main cable and the power supply side connector, and Fig. 3 shows the connection between two power supply lines. Fig. 4 is a perspective view showing the configuration of a branch part when connecting three feeder lines, Fig. 5 is an explanatory diagram showing an example of a case where a reducer is provided between two connectors. , FIG. 6 is a perspective view showing the configuration of an embodiment other than that shown in FIG. 5 of the present invention, FIG. FIG. 9 is an explanatory diagram showing the structure of another branching part of the present invention, and FIG. 10 is a perspective view showing the structure of the connector used in the embodiment of the present invention. The sectional views, FIG. 11 and FIG. 11a, show an example in which a conventional branch sleeve is used, and FIG. 12 is an explanatory diagram of a conventional example in which a branch line as a power supply line is directly connected. Code 1 in the diagram: Main cable, 2: Conductive wire,
3...Insulating member, 5...Branch portion, 7.
...Protective cover 10 ... Branch sleeve, 11 ... Screw hole, 15 ... Power side connector 20 ... Load side connector '21
...Feeding line, 22... Conductive wire, 25.
...Two-pronged member, 27...Reducer. Figure 7 Figure 9

Claims (2)

[Claims] (1) A conductive wire of the main cable is exposed, a substantially ring-shaped branch sleeve is integrally provided to cover the exposed portion of the conductive wire, and the branch portion is covered with an insulating member and a protective cover, and the branch sleeve A low-voltage main line branching device characterized in that an end of a power supply side connector is connected by screwing or the like, and a power supply line connector can be connected to the other end of the power supply side connector. (2) Peel off the insulating member of the main cable to expose the conductive wire, provide an approximately ring-shaped branch sleeve integrally to cover the exposed portion of the conductive wire, and cover the branch with an insulating member and a protective cover. A branch part is formed so as to cover the branch part, a power supply side connector is integrally provided in the branch part, the power supply side connector is covered with a protective cover of the branch part with the insertion part of the load side connector exposed, and the power supply side connector is covered with a protective cover of the branch part, and the power supply side connector is A low-voltage trunk line branching device characterized by a side connector arranged parallel to the trunk cable.