JP3049472B2 - Cable track - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable line used for indoor wiring and the like.

[0002]

2. Description of the Related Art The applicant of the present invention has previously constructed such that, in a cable line used, for example, for indoor wiring of a high-rise building, a circuit breaker is directly attached to a trunk cable itself, and a branch cable to each floor is taken out therefrom. For example, Japanese Utility Model Publication No. 6-4498 and Japanese Utility Model Publication No. 5-31779 have proposed cable lines that save space and simplify wiring work.

In the cable line disclosed in Japanese Utility Model Publication No. 6-4498, as shown in FIG. 5, an exposed portion of a conductor 3a is formed at a predetermined portion of a trunk cable 1a, and a rectangular flat plate-shaped circuit breaker is mounted there. A connection terminal 7a having a plate portion 8a is fixed, and a circuit breaker 6a is fixed to the mounting plate portion 8a with bolts 20a. The bolt 20a also serves as an electrical connection between the circuit breaker 6a and the connection terminal 7a. Here, 30a is an insulating tape covering the exposed portion of the conductor, and 21a is a protective case. Thus, the switching knob 22 of the circuit breaker 6a
By operating a, the power supply to the branch line 24a can be controlled.

[0004]

In the above-described cable line, the mounting plate 8a is positioned as a power supply to the circuit breaker 6a, and power is supplied by using the fixing bolt 20a of the circuit breaker 6a. Therefore, the connection terminal 7a and the mounting plate 8
a used as an integral part. Therefore, the mounting plate portion 8a becomes a charged portion when the main cable 1a is energized, and there is a problem that even though it is covered by the protective case 21a, there is a risk of an accident such as electric shock. It is conceivable to cover the surface of the mounting plate portion 8a with the insulating tape 30a, but there is a problem that the insulating process such as tape winding requires a lot of trouble because the shape of the portion is complicated.

Accordingly, the present invention provides a cable line in which a circuit breaker is directly attached to a main cable without exposing a charged portion at a circuit breaker mounting portion and simplifying insulation processing of a circuit breaker mounting portion of the main cable. It is an object to provide a cable line that can be performed.

[0006]

According to the cable line of the present invention, a conductor exposed portion is formed at a predetermined portion of a trunk cable, and a connection terminal is fixed to the conductor exposed portion. are breaker mounting plate attached made, and the breaker main body is fixed to the mounting plate, it comprises a circuit breaker unit having electrical connection to the branch conductive and breaker body and the connection terminal, wherein How the breaker mounting plate is attached to the connection terminal
Is attached to the side of the connection terminal on the circuit breaker body mounting surface of the mounting plate.
And it is characterized in der Rukoto which attached the rear surface side. It is preferable that the conductor exposed portion and the connection terminal are hermetically surrounded by an insulating material.

As a method of mounting the branch conductor,
A method in which one end is connected to a terminal provided on the surface of the connection terminal and the other end is connected to an input terminal of the circuit breaker main body, or one end is connected to the conductor exposed portion with the connection terminal. A method of compressing and fixing and connecting the other end to the input terminal of the circuit breaker main body or the like is a preferable method in that the electrical connection between the connection terminal and the circuit breaker main body can be reliably performed.

Further, when the cable line is a multi-phase multi-line line in which a plurality of trunk cables are laid in parallel,
A conductor exposed portion is formed at a predetermined portion of one of the trunk cables except for the trunk cables located on both sides of the trunk cable laid in parallel, and a connection terminal is fixed to the conductor exposed portion, A breaker mounting plate made of an insulator is attached to the connection terminal, a breaker is fixed to the mounting plate, and a breaker unit having a branch conductor for electrically connecting the connection terminal and the breaker is provided. Provided to the connection terminal.
The circuit breaker mounting plate is attached to the side end of the connection terminal.
It can be configured such that the back side of the circuit breaker body mounting surface of the plate is attached .

[0009]

According to the cable line of the present invention, an insulating plate is used as the mounting plate of the circuit breaker, which is attached to the connection terminal. Never become a charged part. Accordingly, the safety of the breaker mounting portion of the trunk cable can be enhanced, and the insulation can be performed only on the exposed conductor portion of the trunk cable and on the connection terminal body portion, and the construction can be facilitated. In addition, since the connection terminal and the breaker body are electrically connected by a separate branch conductor, a more reliable electrical connection between the breaker body and the fixing bolt of the breaker body as in the conventional case. It can be performed.

Further, if the configuration of claim 5 is adopted (for example, in the case of a three-phase three-wire type line, the circuit breaker section according to claim 1 is provided in the S-phase normally wired in the middle row), a laid cable A circuit breaker can be mounted at a substantially central portion of the line. In this case, there is an advantage that the circuit breaker mounting portion can be made compact, and the operation of connecting the branch conductor to the circuit breaker can be performed safely and easily.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view showing a first embodiment of a cable line according to the present invention. In the figure, reference numeral 1 denotes a trunk cable, and a breaker body 6 is attached to the trunk cable 1.
And a cable line having a circuit breaker section 2 which is a portion from which the branch line 24 is taken out via the circuit breaker main body 6. In this embodiment, the trunk cable 1 is a flat trunk cable in which a plurality of stranded conductors 3 are arranged in a horizontal row, and a common insulating coating layer 4 and a protective sheath 5 are sequentially provided on each of the stranded conductors 3. Is exemplified.

At a predetermined portion of the trunk cable 1, that is, at a portion where a branch line needs to be taken out from the trunk cable 1, the insulating covering layer 4 and the protective sheath 5 are removed to form an exposed portion of the conductor 3. A connection terminal 7 made of a highly conductive metal such as aluminum or copper is provided on the exposed conductor.
Are fixed by a method such as crimping. The connection terminal 7 includes a connection terminal body 9 having a U-shaped cross section and a tip member 10 having a U-shaped cross section that is fitted into an opening of the connection terminal body 9.
When the connection terminal body 9 and the tip member 10 are connected to each other, the connection terminal main body 9 and the tip member 10 have a flat short cylindrical space having a shape matching the exposed portion of the conductor 3. The main body 9 is fitted, and then the tip member 10
Is temporarily fixed by being fitted to the main body 9 and finally fixed to the exposed conductor by means such as applying a compressive force.

A circuit breaker mounting plate 8 in the form of a rectangular flat plate is attached to the side of the connection terminal 7, and the circuit breaker (no-fuse breaker) main body 6 is attached to the mounting plate 8 by bolts 20, 20. Fixed. Attach breaker to connection terminal 7
The attaching mode of the plate 8 is such that the mounting plate 8 is attached to the side end of the connection terminal 7.
The back surface side of the circuit breaker body mounting surface is provided. An existing circuit breaker can be used as the circuit breaker body 6, and a branch line 24 is connected to the circuit breaker body 6 via a crimp terminal 241. Reference numeral 240 denotes a branch line of a main line cable of another phase laid in parallel with the main line cable 1, and this point will be described later.

The circuit breaker mounting plate 8 is made of an insulator, for example, a hard insulating resin plate such as an acrylic plate, a polyvinyl chloride plate, a bakelite plate, an epoxy plate, a polyester plate, a ceramic plate, a glass plate, or the like. Can be used. The attachment of the circuit breaker mounting plate 8 to the connection terminal 7 includes, for example, bonding with an adhesive, fixing with a bolt, or fitting with a portion that engages with each other.

As described above, since the mounting plate 8 is made of an insulator, the electrical connection between the circuit breaker body 6 mounted and fixed on the mounting plate 8 and the connection terminal 7 must be separately secured. The branch conductor 72 plays the role of connection. As the branch conductor 72, a flexible conductor or busbar made of copper, aluminum, or the like, a bare conductor, an insulated wire, or the like can be used.
The method of attaching the branch conductor 72 to the breaker body 6 and the connection terminal 7 is arbitrary. In the present embodiment, one end is connected to the terminal 71 provided on the surface of the connection terminal 7 and the other end is connected to the cutoff. An example of an attachment method that is connected to an input terminal of the container main body 6 is illustrated.

An insulating tape 30 is wound around the exposed portion of the conductor 3, the surface of the connection terminal 7, and the portion of the trunk cable 1 which reaches the insulating coating layer 4 and the end of the protective sheath 5, and is subjected to insulating treatment. You. Of course, the insulating tape 30 is also wound around the terminal 71 on the connection terminal body 9. Since the circuit breaker mounting plate 8 is an insulator, it is possible to substantially prevent the charged part from being exposed by such insulation treatment.

Further, the circuit breaker body 6 and the connection terminals 7 are covered with a cover 21. However, the switching knob 22 of the circuit breaker body 6 is exposed by providing a window on the cover 21 so that the switching knob 22 can be operated from the outside. Adhesive tapes 26, 26 are wound around the ends of the cover 21, respectively.
Thereby, it is tightly fixed to the protective sheath 5 of the trunk cable 1.

The circuit breaker section 2 is formed on the main cable 1 as described above. When such a cable line is used, for example, for indoor wiring of a high-rise building, the circuit breaker section 2 is provided on each floor. Thus, they are provided at predetermined intervals along the longitudinal direction of the trunk cable 1. By operating the switching knob 22 of the breaker body 6, the branch line 2
4 can be controlled. By employing the cable line, there is no need to separately provide a circuit breaker at a location away from the main cable 1, which can contribute to space saving.

FIG. 2 is a sectional view showing another embodiment of the cable line of the present invention. In the figure, the same reference numerals as those in FIG. 1 indicate the same parts. The difference from the embodiment shown in FIG. 1 is that the branch conductor 73 for electrically connecting the circuit breaker main body 6 and the connection terminal 7 is connected to the connection terminal 7 with one end attached to the exposed portion of the conductor 3. And the other end is configured to be connected to the input terminal of the circuit breaker body 6.

More specifically, referring to FIG. 3, which is a cross-sectional view taken along the line AA of FIG. 2, the branch conductor 73 is provided at the end side of the conductors 3, 3,... The connection terminal 7 is inserted into a flat short cylindrical space formed by the connection terminal body 9 and the distal end member 10, that is, into the flat short cylindrical space of the connection terminal 7. By compressing the connection terminal 7 in this state, the branch conductor 73 is fixed. With this structure, there is an advantage that the electrical connection between the branch conductor 73 and the conductor 3 can be performed more reliably, and the trouble of separately connecting the branch conductor 73 to the connection terminal 7 can be omitted. The branch conductor 73 may be simply attached to the conductor 3 or may be fixed to the conductor 3 in advance by means such as soldering or brazing.

FIG. 4 is a front view showing a specific example in which the present invention is applied to a multi-phase multi-wire cable line. In this embodiment, 3
2 illustrates a three-phase cable line. In the figure, R
Phase, S-phase, and T-phase three trunk cables 1, 1, 1 are laid in parallel. Of these trunk cables, the trunk cables (R-phase, T-phase) located on both sides in the parallel laid state are provided.
A circuit breaker unit 2 is provided on a trunk cable excluding the phase), that is, an S-phase trunk cable 1 located at the center. Attachment of the breaker body 6 to the S-phase trunk cable 1 and branch conductor 7
The connection of No. 2 is the same as the above-described method.

The R-phase and T-phase trunk cables 1 and 1 are provided with branch connection portions 12 and 12, respectively, from which branch wires 240 and 240 are drawn and connected to the input side of the breaker body 6, respectively. I have. Then, branch lines 24, 24, 24 corresponding to the respective phases are drawn out from the output side of the circuit breaker body 6.

By attaching the circuit breaker body 6 to the S-phase trunk cable 1 in this manner, the circuit breaker body 6 can be positioned substantially at the center of the laid cable line. It is possible to reduce the size without protruding from the space. In addition, since the S-phase of the cable line and the S-phase of the circuit breaker body 6 naturally match, the connection of the branch conductor 72 to the circuit breaker body 6 can be performed safely and reliably. In the case of a four-wire cable line, for example, the circuit breaker body 6 may be attached to one of the two trunk cables located at the center in the parallel installation state.

[0024]

According to the cable line of the present invention as described above, the circuit breaker mounting plate is made of an insulator and is attached to the connection terminal. Does not become a charged part even when the main cable is energized. Therefore, the safety of the breaker mounting portion of the trunk cable can be enhanced, and the insulation treatment can be facilitated. In addition, since the connection terminal and the breaker body are electrically connected by a separate branch conductor, a more reliable electrical connection between the breaker body and the fixing bolt of the breaker body as in the conventional case. It can be performed.

As a result, it is not necessary to provide a circuit breaker separately at a location away from the main cable, and in addition to the original effect of contributing to space saving, the charged portion does not appear and electrical connection is established by the branch conductor. By being able to perform it reliably, there is an effect that the safety of the circuit breaker can be significantly improved.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a main part showing an embodiment of a cable line according to the present invention.

FIG. 2 is an enlarged sectional view of a main part showing another embodiment of the cable line of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a front view showing a specific example in which the present invention is applied to a polyphase multiwire cable line.

FIG. 5 is an enlarged sectional view of a main part showing an example of this type of conventional cable line.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main cable 2 Breaker part 3 Conductor 30 Insulation tape 6 Breaker main body 7 Connection terminal 71 Terminal 72, 73 Branch conductor 8 Breaker mounting plate

Claims (5)

(57) [Claims] 1. A conductor exposed portion is formed at a predetermined portion of a trunk cable, a connection terminal is fixed to the conductor exposed portion, and a breaker mounting plate made of an insulator is attached to the connection terminal.
A circuit breaker main body is fixed to the mounting plate, and a circuit breaker section having a branch conductor for electrically connecting the connection terminal and the circuit breaker main body is provided , and a circuit breaker mounting plate to the connection terminal is provided.
Is attached to the side edge of the connection terminal with a circuit breaker
Cable line, characterized in der Rukoto which attached the rear surface side of the body mounting surface. 2. The semiconductor device according to claim 1, wherein the exposed portions of the conductor and the connection terminals are hermetically surrounded by an insulating material.
The described cable track. 3. The cable according to claim 1, wherein one end of the branch conductor is connected to a terminal provided on a surface of the connection terminal, and the other end is connected to an input terminal of the breaker body. line. 4. The branch conductor, one end of which is compression-fixed at the connection terminal with one end attached to the exposed conductor, and the other end is connected to an input terminal of the circuit breaker body. Item 2. The cable line according to item 1. 5. The cable line is a polyphase multi-wire line in which a plurality of trunk cables are laid in parallel, and one trunk line excluding the trunk cables located on both sides of the parallel laid trunk cables. A conductor exposed portion is formed at a predetermined portion of the cable, and a connection terminal is fixed to the conductor exposed portion. A breaker mounting plate made of an insulator is attached to the connection terminal, and the breaker mounting plate is attached to the mounting plate. A circuit breaker is provided, and a breaker section having a branch conductor for electrically connecting the connection terminal and the circuit breaker is provided , and a breaker mounting plate for the connection terminal is provided.
Is attached to the side edge of the connection terminal with a circuit breaker
A cable line provided with a back side of a body mounting surface .