JP2000308242A - Bus duct connection part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily provide branching when needed and to reduce cost by forming the acceptance connection part of a terminal for branching at the connection parts of conductor end parts, covering an open surface with a cover member, and providing a knockout part for forming an opening where the terminal for branching can be inserted into the corresponding part to the reception connection part. SOLUTION: In a bus duct connection part 1 where a bus duct 7 is connected, a cover member 11 is engaged to an open surface corresponding to a branch where a reception connection part is located from the outside of a bus duct side plate 9, and the cover member 11 is fixed to the bus duct 7 from the outer portion of the cover member 11. A knockout part 11b is formed at the cover member 11, and the bus duct connection part 1 is closed. When branching is required, the cover member 11 is removed from the bus duct connection part 1 and the knockout part 11b is punched, thus forming an opening 11a for plug-in branching at the cover member 11, and hence easily performing branching when the branching is required, and realizing low price.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection portion of a bus duct constituting an electric trunk line in an office building or the like, and more particularly to a phase connection type such as an insulated conductor contact type or an interphase reduction type used for taking out a branch circuit. The present invention relates to a collectively tightened bus duct connection.

[0002]

2. Description of the Related Art Conventionally, a bus duct has been used when an electric trunk line is constructed in an office building or the like. And
When the branch of the bus duct is required, a plug-in branch terminal such as a branch box is inserted from the plug-in branch open portion of the branch bus duct, and the branch circuit is taken out from a required position. For this reason, a branch bus duct must be provided in advance at a place where a branch is required in the future.

As a specific example of such a branch bus duct, for example, as shown in Japanese Patent Publication No. 49-44387, a branchable bus duct connection is provided at a predetermined branch point, and a plug-in branch terminal is inserted into this. There are things that branch off.

Further, as shown in Japanese Patent Publication No. 49-44388 and Japanese Patent Publication No. 50-30278, a branch can be made by disposing a branchable bus duct connection portion at a branch point and inserting a plug-in branch terminal into this. In some configurations, when branching of the bus duct is unnecessary, a plug-in branching opening into which a plug branching terminal is inserted is covered with a lid, and this is stopped with a screw or the like.

[0005]

However, the processing of the plug-in branch opening for inserting a plug-in branch terminal such as a branch box into the above-described branchable bus duct connection is not disclosed at all. It is not disclosed, or only a configuration for covering with a lid is disclosed. If the plug-in branch opening is left open when branching is unnecessary, foreign matter may enter the opening and cause a short circuit, ground fault, or the like. If the opening for use is covered or removed with a lid, a problem arises in that it becomes expensive.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and in a branchable bus duct connection portion provided at a predetermined location, the bus duct connection portion can be extremely changed at any time when branching is required. An object of the present invention is to provide an inexpensive bus duct connecting portion that can be easily handled.

[0007]

According to the present invention, there is provided a bus duct connecting portion, wherein conductor ends of a bus duct to be connected are inserted between each of a plurality of insulating separators arranged at a predetermined interval and connected to each other. In the bus duct connecting portion which is collectively fastened with a fastener from both sides, a receiving connecting portion of a branch terminal is formed at a connecting portion between the conductor ends, and an open surface where the receiving connecting portion is located is covered with a cover member. The cover member is provided with a knockout portion that can form an opening through which the branching terminal can be inserted at a location corresponding to the receiving connection portion.

For example, the in-phase conductor ends of the bus ducts to be connected are connected face to face while being connected to the conductive connecting member, or the in-phase conductor ends of the bus ducts to be connected are overlapped with each other directly or electrically. A connection that is connected via a connecting member, with an insulating separator interposed between the ends of the different-phase conductors and between the outermost conductor end and the duct side plate joining plate provided outside thereof, and tightened by passing through an insulating sleeve. In the bus duct connection part which is collectively tightened by penetrating the tool, etc., a reception connection part capable of receiving the branch terminal is formed at the connection part between the in-phase conductor ends, and an open surface corresponding to the branch where the reception connection part is located Can be formed in the cover member at a location corresponding to the receiving connection portion, the opening having a size capable of inserting at least the branching terminal when branching is required. In which checkout portion.

[0009] Further, at least the knockout portion in the bus duct connection portion is made of plastic;
More preferably, the cover member provided with the knockout portion is made of plastic. Preferably, the plastic is a temperature indicating material or a transparent material.

[0010]

According to the present invention, the branchable bus duct connecting portion is
With respect to the bus duct connection part of the butt type or the bus duct connection part of the superposition type, the opening for receiving the plug-in branch terminal is covered with a cover member, and the cover member has a size large enough to insert at least the plug-in branch terminal. A knockout portion is formed. For the bus duct connecting portions to be arranged at the connection points or all the connection points where it is considered necessary to be branched in the future, the knock-out parts are formed in advance on the cover member. By punching in the above, an opening for plug-in branching is easily formed. Therefore, it is possible to take the branch very easily at any time and from any connection part as much as possible while preventing dust from entering the bus duct connection part at the maximum.

Further, the knockout portion of the bus duct connection portion and the entire cover member provided with the knockout portion are made of plastic, so that the insulation can be made very excellent. In addition, it is easy to recognize an abnormal part due to discoloration when formed of plastic of a temperature indicating material, and it is possible to visually check the connection state in the bus duct connection part when formed of transparent plastic. Therefore, it is not necessary to remove the cover member of the bus duct connection portion at the time of inspection, which is preferable because the inspection work is facilitated.

In particular, when the entire cover member provided with the knockout portion is made of plastic, the knockout portion can be easily formed in the manufacturing process, the manufacturing cost can be reduced, and the weight of the cover member can be reduced. be able to.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of a bus duct connecting portion according to the present invention will be described with reference to the drawings, but the technical idea of the present invention is not limited by such embodiments.

FIG. 1 shows a specific example of the bus duct connecting portion of the present invention.
6 to FIG. FIG. 1 is an exploded perspective view of a bus duct connection portion, FIG. 2 is a partially cutaway plan view showing a non-covered bus duct connection portion with a cover member removed, and FIG. 3 is a bus duct connection in which a plug-in branch opening is open. FIG. 4 is a perspective view showing a cover member in which a plug-in branch opening is in an open state, and FIG. 5 is a front view showing a state in which a bus duct connection part and a branch box are connected by plug-in branch terminals. FIG. 6 is a partially cutaway front view showing a main part in a state where the bus duct connection portion and the branch box are connected by plug-in branch terminals.

As shown in FIGS. 1 and 2, a plate-shaped insulating separator 2 is provided at a predetermined interval in the bus duct connecting portion 1.
Are disposed on the outside of the insulating separator 2 located on both sides, and the duct side plate connecting plate 3 is provided, and between the insulating separators 2, along with the insulating separator 2,
For example, two conductive connection members 4 are provided. Substantially rectangular insertion holes 2a, 4a are formed at substantially the centers of the insulating separator 2 and the conductive connection member 4, respectively.
The insulating sleeve 5 is inserted through 4a. Further, bolt insertion holes 3a and 5a for inserting bolts 6a as fasteners are formed substantially at the centers of the duct side plate 3 and the insulating sleeve 5 to be inserted.

An insulating separator 2, a duct side plate 3,
The conductive connecting member 4 is provided with a bolt insertion hole 5 of the insulating sleeve 5.
The bolt 6a and the nut 6 are inserted through the bolt 6a.
The unit is temporarily fastened in advance by a fastening tool such as b, and is a unit temporarily assembled even when the bus duct 7 is not connected.

At the end of the bus duct 7 to be connected, three or more plate-shaped conductor ends 8 are provided at predetermined intervals, and bus duct side plates 9 are arranged on both outer sides of the conductor end 8. .
When the opposing bus ducts 7 are connected to each other, each conductor end 8 is inserted between two conductive connecting members 4 provided between the insulating separators 2 to the vicinity of the insulating sleeve 5, and the in-phase conductor end is inserted. The portions 8 are electrically connected to each other via the conductive connecting member 4, and the bus duct side plate 9 is positioned so as to be in contact with the outer surfaces of the two duct side plate joining plates 2. At this time,
The insulating separator 2 insulates between the conductor ends 8 in different phases and between the outermost conductor end 8 and the duct side plate joining plate 3. Then, the bus duct side plate 9 is placed on the disc spring 6c from outside.
, The bus ducts 7 are connected to each other by inserting bolts 6a into the holes 3a, 5a via the disc springs 6c, tightening them with the nuts 6b, and tightening them together.

A branching box 12 to be described later is provided between the conductor end 8 of one bus duct 7 to be connected to and opposed to the conductor end 8 of the other bus duct 7 and between the conductive connection members 4. Is formed as a receiving connection portion so that the plug-in branch terminal 13 such as the plug-in branch terminal 13 can be inserted.
Are held and branched by the conductive connecting members 4 located on both sides.

Then, as shown in FIG.
In the bus duct connecting portion 1 to which the connecting portion is connected, a cover member 1 made of transparent plastic or the like is provided on an open surface corresponding to the branch where the receiving connecting portion is located in order to prevent intrusion of dust and the like.
1 from the outside of the bus duct side plate 9 and cover member 11
A screw or the like is screwed into the bus duct 7 from outside to fix the cover member 11.

As shown in FIG. 4, the cover member 11 has a substantially U-shaped cross section, and has a substantially central portion into which a plug-in branch terminal 13 such as a branch box 12 described later can be inserted. The rectangular plug-in branching opening 11a is formed by this, and the size of the present embodiment is as large as above the outermost conductive connection member 4 in the width direction of the conductor end 8 and in the length direction of the conductor end 8. It reaches above the tip of the conductor end 8 of the bus duct 7 to be connected. The size and shape of the plug-in branch opening 11a are not limited to those described above, but may be any size and shape in which the plug-in branch terminal 13 can be inserted.

The plug-in branch opening 11a has a knock-out structure. Usually, a knock-out portion 11b is formed substantially at the center of the cover member 11, and the upper and lower portions of the bus duct connection portion 1 are closed. When branching is necessary, the cover member 11 is detached from the bus duct connection portion 1 and the knockout portion 11 is removed.
b is punched out with a hammer or the like, so that the cover member 11
Is formed with the plug-in branch opening 11a.

By attaching the cover member 11 having the plug-in branch opening 11a to the original position of the bus duct connection part 1, the bus duct connection part 1 having the plug-in branch opening 11a is obtained. The connection of the bus duct 7 is completed. As shown in FIGS. 5 and 6, the branch box 1 is inserted through the plug-in branch opening 11a.
When the plug-in branch terminal 13 such as 2 is inserted, the plug-in branch terminal 13 is inserted between the conductive connection members 4 and held therebetween, so that the plug-in branch terminal 13 and the conductive connection member 4 are electrically connected. Will be connected.

By making the plug-in branch opening 11a have a knockout structure, the plug-in branch opening 11a can be formed only when branching is necessary, and an accident such as a short circuit or ground fault due to the entry of dust or the like becomes possible. Can be prevented. In addition, the plug-in branch opening 11a can be easily formed at any point where a branch is required in the future by using the cover member 11 in which the knockout part 11b is formed in advance. The knockout portion 11b is formed by punching the cover member 11 with a hammer or the like to thereby form the plug-in branch opening 11a.
It is appropriate to form a notch or the like so as to form a notch. That is, the knockout portion 11b and the cover member 11
And a partial connecting portion (not shown) between them, and by punching out with the above-mentioned hammer or the like, the partial connecting portion is cut and the plug-in branch opening 11a is formed.
Furthermore, by using the knockout structure, the plug-in branch opening 11a can be manufactured at low cost.

In the case where only the knockout portion 11b is made of plastic, as shown in FIGS. 7 and 8, the knockout portion 11b is previously formed on the plastic material 20.
The plastic material 20 on which the knockout portion 11b is formed is placed on the cover member 11 in which the plug-in branch opening 11a is formed in advance so as to close the plug-in branch opening 11a, and the knockout portion 11b
And the plug-in branch opening 11a is fixed to the fixing surface 30 with an adhesive or the like so that the centers thereof are at the same position. In this case, the shape and size of the knockout portion 11b formed in the plastic material 20 and the plug-in branching opening portion 11a formed in the cover member 11 are appropriate, but it is preferable that both are the same.

Although the embodiment of the bus duct connecting portion 1 according to the present invention has been described above, the present invention is not limited to the above embodiment, and the following expansions and modifications are possible. is there.

For example, in the above embodiment, the bus duct 7 to be connected is a three-wire bus duct 7, four insulating separators 2, and two conductive connecting members 4 are interposed between the insulating separators 2. As described above, a two-wire type or four-wire type or more bus duct 7 or conductive connection member 4 may be used as one sheet. Further, the present invention can be applied to a phase conversion type bus duct.

Although the connection method of the bus duct 7 has been described as a butt method, for example, the conductive connection member 4 is previously attached to the surface of each insulating separator 2 which is in contact with the conductor end 8 of the bus duct 7 to be connected. In addition, the conductive connecting member 4
The in-phase conductor ends 8 of the bus ducts 7 to be connected to each other may be overlapped with each other and fastened with a fastening tool. The knock-out plug-in branch opening 11a of the knockout structure may be provided in the bus duct connection portion 1. Are all included.

The connection method of the plug-in branch terminal 13 by the receiving connection portion is such that the plug-in branch terminal 13 is inserted into the branch space 10 formed between the conductive connecting members 4 and between the bus duct conductor ends 8. Although the method of inserting and holding is described, the invention is not limited to this.
As shown in FIG. 3 (a) or (b) of Japanese Patent Application Laid-Open No. 9-44387, the width of the conductive connecting member 4 is made larger than the width of the bus duct conductor end 8, and the conductive projecting from the upper and lower portions of the conductor end 8 Any receiving connection portion may be used, such as inserting and fitting the plug-in branch terminal 13 between the sexual connection members 4. Therefore, the in-phase conductor ends 8 may be overlapped and connected without using the conductive connection member 4, and the plug-in branch terminal 13 may be inserted and received by further overlapping at the overlapped portion.

The bus duct connecting portion according to the present invention is an air-insulated bus duct provided with bare conductors, such as a bus duct connecting portion for collectively tightening and connecting conductors through an insulating separator. Connect
The present invention can also be applied to a structure in which one or a plurality of screw parts are connected together by tightening together.

Although one knockout portion 11b is formed substantially at the center of the cover member 11, the location and number of the knockout portions 11b are not limited to the above embodiment, and one bus duct In order to enable a plurality of branches from the connection portion 1, a plurality of knockout portions 11b are provided on the cover member 11, or a plurality of knockout portions 11b are formed for each plug-in branch terminal 13 of each phase. Etc. are appropriate. in this case,
The plurality of knockout portions 11b may be formed in parallel or in series, or may be formed in a staggered arrangement in each phase.

Also, the branch box 12 and the like are connected to the plug-in branch opening 11 of the cover member 11 of the bus duct connecting portion 1.
a), the cover member 11 is replaced with a cover member 11 at a connection point that requires branching, or another new knockout portion 11 is used.
By replacing the cover member 11 with b,
It is possible to prevent dust from entering when not in use. Note that the configuration of the plug-in branching terminal 13 is not limited to the embodiment, but encompasses all terminals that can be suitably used.

Further, knockout portions 11b provided on the cover member 11 are formed above and below the bus duct connection portion 1, and
Two bus duct connection parts 1 may be configured to be capable of two branches. In this case, the knockout parts 11b of the upper and lower cover members 11 of the bus duct connection part 1 are opened, and plug-in branches such as the branch box 12 are respectively opened. The terminal 13 will be inserted.

Further, in addition to forming the cover member 11 from plastic, a temperature indicating material may be mixed into the plastic so that the temperature of the cover member 11 changes to a predetermined temperature or more. The abnormal temperature location of the bus duct connection 1 can be easily determined, and the repair process of the location can be quickly performed. Note that only the knockout portion 11b of the cover member 11 can be made of plastic.

[0034]

As described above, by arranging the branchable bus duct connection portion of the present invention at a predetermined position and using the same, dust buses can be prevented from entering the bus duct connection portion to the maximum extent, and any bus duct connection can be prevented. When the branch is required at any time even from the connecting portion, the branch can be very easily performed, and this can be realized at a low cost.

Further, when the knockout portion of the bus duct connection portion or the entire cover member provided with the knockout portion is formed of plastic, it is possible to make the insulation very safe and extremely excellent in insulating properties. In the case where it is formed of a transparent material or plastic, there is an effect that the inspection work becomes extremely easy.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a bus duct connection according to the present invention.

FIG. 2 is a partially cut-away plan view showing a bus duct connection portion with a cover member removed.

FIG. 3 is a plan view showing a bus duct connection portion in which a plug-in branch opening is in an open state.

FIG. 4 is a perspective view showing a cover member in which a plug-in branch opening is in an open state.

FIG. 5 is a front view showing a state in which the bus duct connection portion and the branch box are connected by plug-in branch terminals.

FIG. 6 is a partially cutaway front view showing a main part in a state where the bus duct connection portion and the branch box are connected by plug-in branch terminals.

FIG. 7 is a partially enlarged plan view of a cover member and a knockout portion of another embodiment.

FIG. 8 is a sectional view of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bus duct connection part 2 Insulation separator 2a Insertion hole 3 Duct side plate connecting plate 3a Bolt insertion hole 4 Conductive connection member 4a Insertion hole 5 Insulation sleeve 5a Bolt insertion hole 6a Bolt 6b Nut 6c Disc spring 7 Bus duct 8 Conductor end 9 Bus duct side plate DESCRIPTION OF SYMBOLS 10 Branch air gap 11 Cover member 11a Plug-in branch opening 11b Knock-out part 12 Branch box 13 Plug-in branch terminal

Claims (2)

[Claims] 1. A bus duct in which conductor ends of a bus duct to be connected are inserted and connected to each other between a plurality of insulating separators arranged at predetermined intervals, and collectively fastened with fasteners from both sides of the insulating separator. In the connection portion, a receiving connection portion of the branch terminal is formed at a connection portion between the conductor end portions, an open surface where the receiving connection portion is located is covered with a cover member, and the cover member is connected to the reception connection portion. A bus duct connection portion, wherein a knockout portion capable of forming an opening through which the branching terminal can be inserted is provided at a corresponding portion. 2. The bus duct connection according to claim 1, wherein at least the knockout portion is made of plastic.