JPH11252755A - Connecting apparatus for bus duct - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate insertion of a bus duct connecting end part into a connection unit, by forming outward protrusions touching the end parts of duct side plates, on the central external surfaces of joint plates, making the breadth of each outward protrusion smaller than that of a washer, and making its thickness equal to or larger than that of the end part of each duct side plate. SOLUTION: Between the end parts of bus ducts arranged facing each other with a specified interval between, a connecting unit 40 in a temporarily assembled state is put so that the end parts of joint plates 12 may be lapped over the internal surfaces of side plates 19. Next, insertion and fitting is performed until the side brims of the outward protrusions 13 of the joint plates 12 touch the end parts of the side plates 19, so that the connecting unit 40 may enter between conductors of different phases toward the end part of one bus duct 20, and insulating separators 111 and conductive connecting members 121 may enter the gap between each outermost conductor and a side plate 19. And the side plates 19 and the joint plates 12 lapped over in and out are fixed with screws 18. Here, each outward protrusion 13 has a breadth smaller than that of a washer 14, and a height equal to or slightly larger than the thickness of each side plate 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bus duct, and more particularly to an apparatus for connecting a bus duct of a phase-tightening type, such as an insulated conductor close contact type or an interphase reduction type.

[0002]

2. Description of the Related Art A bus duct of the above-mentioned type includes a conductive connecting member for in-phase conductors, an insulating separator between out-of-phase conductors, and a connection between an outermost conductor and a joint plate engaged with a side plate of the bus duct. Insert a connection unit consisting of an insulating separator, a flat joint plate, a spring washer, and a collective tightening bolt and nut with insulation coating, into the end of one of the bus ducts with the joint plate positioned outside the end of the duct side plate. The ends of the duct side plate and the end of the joint plate are assembled with screw parts. Next, the other end of the other bus duct, which is oppositely connected, is inserted and fitted to the connection unit with the joint plate positioned outside the end of the duct side plate, and the end of the duct side plate and the end of the joint plate are assembled with screw parts. Then, a connecting device of a conductor end butt type, which is collectively tightened with a tightening bolt and a nut via the above-mentioned spring washer that penetrates the conductive connecting member, the insulating separator and the joint plate, and covers a corresponding open surface of the connecting portion with a cover member. (For example, Japanese Utility Model Application Laid-Open No. 53-28499).

[0003]

In the conventional bus duct connecting apparatus, when the connecting unit is temporarily tightened, a conductive connecting member, an insulating separator, a flat joint plate, a spring washer, and an insulating member which constitute the connecting unit. Each of the coated collective tightening bolts and nuts is in contact with each other without a gap, and it is not easy to insert the connection unit into the bus duct connection end or the bus duct connection end into the connection unit. -A lot of labor is required for fitting work.

When the end of the duct side plate and the end of the joint plate are assembled with screw parts, the holes for the assembling screw parts for fixing the ends are not aligned, and the insertion dimension of the connection unit or the bus duct unit to be connected is adjusted. It took a lot of time and labor to adjust the holes.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in a conventional bus duct connection device of a phase-tightening type and a butt type, such as an insulated conductor-contact type and a phase-to-phase type, in which a bus duct connection end and a connection unit are inserted.・ When fitting and connecting, the work of inserting the connection end of the bus duct into the connection unit is facilitated, the insertion dimension is regulated, and the work of assembling the end of the duct side plate and the end of the joint plate with screw parts is facilitated. It is an object of the present invention to provide a bus duct connection device capable of connecting the cables straight and correctly.

[0006]

SUMMARY OF THE INVENTION The present invention provides a conductive connecting member arranged in contact with an in-phase conductor of a bus duct to be connected, a connecting plate arranged inside a duct side plate of the bus duct, and an inter-conductor between different phases. An insulating separator disposed between the outer conductor and the joint plate, a fastener for collectively tightening via a washer, and an end of the conductor is inserted and fitted between the conductive connection members to fit the conductor; In the bus duct connection device to be tightened with the fastener, an outward convex portion is formed on the central outer surface of the joint plate, where the end of the duct side plate abuts, the width of the outward convex portion is smaller than the width of the washer, The bus duct connection device is characterized in that the thickness is not less than the thickness of the end of the duct side plate.

The conductive connecting member is for electrically connecting conductors at a pair of ends of a bus duct to be connected. If the bus duct has a three-phase structure, each end of the three-phase conductor is connected. In-phase conductors between the parts need to be contacted and connected by a conductive connecting member, and between the out-of-phase conductors and between the outermost conductor and the joint plate need to be insulated by an insulating separator. The conductor, the conductive connecting member and the insulating separator are arranged in a stack, and when they are collectively tightened by the fastener,
A gap into which the end of the duct side plate is inserted is formed between the outer surface of the joint plate and the seat surface of the washer.
The insertion dimensions of the ends of the duct side plates located on the left and right sides are regulated to a predetermined distance.

[0008]

When a connection unit comprising a conductive connecting member, an insulating separator, a joining plate and a fastening device for fastening them together is temporarily tightened by the fastening device, the spring washer is placed in the duct width direction at the center of the joining plate. A gap is formed between the outer surface of the joint plate and the seat surface of the washer to absorb the end of the duct side plate of the bus duct, which is located on the outwardly convex portion formed in the vertical direction in FIG. Insertion into the end of the bus duct connection,
It becomes easy to insert the bus duct connection end into the connection unit.

In the connection of the bus duct, the insertion distance of the connection unit into the connection end portion of the bus duct and the insertion distance of the connection end portion of the bus duct into the connection unit are determined in such a manner that the edge of the duct side plate is in the width direction of the center of the joint plate of the connection unit. It is regulated to a predetermined size by abutting the edge of the formed outward convex portion.

When the fastener is compression-tightened, the outwardly projecting portion and the end of the duct side plate of the bus duct are pressed by the spring member and approach the joint plate surface, and the outer surface of the outwardly projecting portion and the outer surface of the end of the duct side plate are separated. They are connected together at the same time.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a bus duct connecting apparatus according to the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of a three-wire butt connection portion of an insulated coated conductor, FIG. 2 is a plan view of a bus duct connection in a temporarily tightened state, and FIG. 3 is a vertical sectional view taken along the line AA of FIG. It is.

At the opposing ends of the bus ducts 20 and 30 that are connected to each other, a gap where the insulating separators 11 and 111 and the conductive connecting member 121 enter between the adjacent conductors 10 of each bus duct and between the outermost conductor and the duct side plate 19. Is formed.

A joint plate 12 which is screwed on the inner surface of the duct side plate 19, insulating separators 11 and 111, a conductive connecting member 121, and a disc spring 14 (corresponding to a spring member) serving as a collective fastening fastener. Bolt 1 with insulation coating through
The connection unit 40 is composed of the nut 5 and the nut 24. The connection unit 40 includes a joint plate 12, an insulating separator 11, a conductive connection member 121, and a disc spring 14.
Are temporarily preliminarily assembled by temporarily tightening the bolts 15 and the nuts 24 with insulating coatings, which are inserted through the centers of the bolts. The corresponding open surface of the bus duct connection is closed by a cover member 21.

As shown in the enlarged perspective view of FIG. 5, the connecting plate 12 has an outwardly projecting portion 13 formed on the outer surface at the center and a hole 25 for bolt insertion at the center. .

The outwardly projecting portion 13 has a width smaller than a width 141 of a disc spring as a washer shown by a two-dot chain line in FIG. In the width direction (vertical direction in the drawing), it has a width (the length of the outwardly protruding portion is greater than the width of the washer) that receives at least the pressing force of the disc spring, and is equal to the thickness of the duct side plate 19 or It has a slightly higher height.

The end of the duct side plate 19 of the bus duct to be connected, which is located on the left and right of the outward protrusion 13, is provided between the outer surface of the joint plate 12 and the seat surface of the disc spring 14 by the outward protrusion 13. Is formed, and the insertion dimension of the edge of the side plate is restricted to a predetermined distance.

As shown in FIGS. 1, 2 and 3,
The temporary assembled unit 40 is placed between the ends of the bus ducts facing each other at a predetermined interval so that the ends of the joint plate 12 overlap the inner surfaces of the side plates 19 of the bus ducts 20 and 30. Insulating separators 11 and 111 are inserted between the conductors of different phases toward the end of one bus duct 20 and the gap between the outermost conductor and the side plate 19.
Then, the conductive connecting member 121 is inserted so as to be inserted therein, and is inserted and fitted until the side edge of the outwardly protruding portion 13 of the joint plate 12 of the connection unit 40 comes into contact with the end of the side plate 19 of the bus duct.
The side plate 19 and the joint plate 12 of the bus duct overlapping inside and outside are fixed with screws 18.

Next, the bus duct 30 on the opposite side to the connection unit 40 assembled to the one bus duct 20
Are inserted so that the respective conductors 102 enter the gaps between the conductive connecting members 121 facing each other, and the end of the side plate 19 of the bus duct is connected to the outwardly protruding portion 13 of the joint plate 12 of the connection unit 40.
Insert until it comes into contact with the side edge of. The joint plate 12 and the side plate 19 of the bus duct overlapping the outer surface thereof are also fixed with screws 18 as described above.

In the above, the side plates 19 of the bus ducts on both sides are provided.
Is located between the joint plate 12 and the disc spring 14, and the end edge thereof is in contact with the side edge of the outwardly protruding portion 13, so that the insertion dimension is regulated to a predetermined distance.

Then, by fully tightening the bolts 15, the bus duct connection portion is collectively tightened via the connection unit as shown in FIG. At this time, the outwardly protruding portion 13 of the connecting plate 12 receives the compressive force of the disc spring 14 and bends until it is flush with the side plates 19 of the left and right bus ducts. That is, when the bolt is fully tightened and before the bolt is temporarily tightened, the disc springs 1 located on both sides of the connection unit are connected.
The width between the bearing surfaces 4 is slightly different. The error in the distance between the disc spring seat surfaces on both sides of the connection unit before and after the final tightening of the bolt is automatically absorbed by the outwardly protruding portion 13 being bent.

The corresponding open surfaces of the connection portions of the connected bus ducts are covered with cover members 21, respectively. The cover member 21 has a substantially U-shaped cross section, fits on the outside of the side surface of the bus duct, and is fixed to the ground terminal 23 provided at the end of the bus duct from the outside of the cover member 21 by a screw 22.

FIGS. 6 (a), 6 (b) and 6 (c) show another embodiment of the outwardly projecting portion. FIG. 6 (a) corresponds to the portion 141 which receives the compressive force of the disc spring. FIG. 6B shows an example in which outward convex portions 131 and 132 are separately formed in the joint plate 12 portion, and FIG. 6B shows an example in which outward convex portions 133 are formed in the entire height direction of the joint plate 12. FIG. 6C shows an example in which auxiliary outward convex portions 134 and 135 are formed above and below the outward convex portion 13 having the configuration shown in FIG.

The outwardly projecting portion of the joint plate in each of the above embodiments is formed by cutting and raising the joint plate 12 by processing.
It may be extruded from the inner surface side of the joint plate 12 and processed and formed.

FIG. 7 shows that, instead of forming the outward convex portion from the connecting plate 12 itself, the outward convex portion is formed by another member having the same thickness as or thinner than the plate thickness of the duct side plate 19. This shows an example in which outwardly projecting portions 13 and 136 are formed by being attached to the outer surface of the joint plate 12 by spot welding, welding, or the like.

According to the present invention, as shown in FIG. 8, instead of the collective tightening bolts penetrating the conductive connecting member and the insulating separator, the joint plate is provided at a symmetrical position in the width direction of the conductor avoiding the conductive connecting member and the insulating separator. Hole 29 in 12
And a pair of bolts 28 are inserted between the connecting plates, and a leaf spring (corresponding to a spring washer) 26 which is commonly fitted to the pair of bolts outside each connecting plate is applied from the outside of the outward convex portion 13. By contacting and tightening, the present invention can also be applied to a connection device of a system in which the three members of the duct side plate joining plate, the connecting portion of the conductor, and the insulating separator are collectively tightened.

[0027]

Advantages of the Invention When the connection unit is temporarily tightened, the spring washer is located on the outwardly protruding portion formed in the center of the joint plate in the width direction of the duct, and the duct side plate of the bus duct is provided between the outer surface of the joint plate and the seat surface of the spring washer. A gap for absorbing the end is formed, and the insertion of the connection unit into the bus duct connection end and the insertion of the bus duct connection end into the connection unit are facilitated.

2. The insertion distance of the connection unit into the connection end of the bus duct and the insertion distance of the connection end of the bus duct into the connection unit when connecting the bus duct are outwardly defined by the edge of the duct side plate of the bus duct formed in the center duct width direction of the connection unit. It is regulated to a predetermined size by abutting on the edge of the projection.

3. When the fastener is compressed and tightened, the outward convex portion and the end of the duct side plate of the bus duct are pressed by the spring member and approach the joint plate surface, and the outer surface of the outward convex portion and the outer surface of the duct side plate end are flush with each other. Collective tightening connection.

Therefore, the connection work between the bus duct and the connection unit can be extremely efficiently and accurately connected, and the bus duct electric line can be laid straight.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention.

FIG. 2 is a plan view showing a temporarily tightened state of a bus duct connecting portion according to the present invention.

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

FIG. 4 is a longitudinal sectional view showing a state where the fastener is tightened in FIG. 3;

FIG. 5 is a perspective view of the joint plate of the present invention.

FIG. 6 is a perspective view showing another embodiment of the present invention.

FIG. 7 is a perspective view showing another embodiment of the present invention.

FIG. 8 is a perspective view showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10, 101, 102 Conductor 11, 111 Insulating separator 12 Joint plate 13 Outward convex part 14 Washer 15, 28 Bolt 16, 17 Screw hole 18, 22, 23 Screw 19 Side plate 20, 30, Bus duct 21 Cover member 24 Nut 25, 27 , 29 Bolt hole 26 Leaf spring 131 to 136 Outward convex part 121 Conductive connecting member 141 Width of washer

Claims (4)

[Claims] 1. A conductive connecting member arranged in contact with an in-phase conductor of a bus duct to be connected, a joint plate arranged inside a duct side plate of the bus duct, between conductors of different phases, and between an outermost conductor and a joint plate. A bus duct connection, comprising: an insulating separator disposed in the connector; a fastener for collectively tightening via a washer; an end of the conductor being inserted between the conductive connecting members to be fitted and tightened by the fastener; In the device, an outward convex portion is formed on the central outer surface of the joint plate, at which an end of the duct side plate abuts,
A bus duct connection device, wherein the width of the outward projection is smaller than the width of the washer, and the thickness is equal to or greater than the thickness of an end of the duct side plate. 2. The bus duct connecting device according to claim 1, wherein the outward convex portion is formed by processing a joint plate. 3. The bus duct connection device according to claim 1, wherein the outward convex portion is formed so as to be attached to an outer surface of the joining plate. 4. The bus duct connection device according to claim 2, wherein the outward convex portion is divided into a plurality.