JPH08289443A - Connector for bus duct - Google Patents

Abstract

PURPOSE: To facilitate the insertion/removal of the connecting end part of conductor at the time of interconnection of bus ducts while preventing the accompanied turning of insulating separator at the time of simultaneous tightening of bolts. CONSTITUTION: A pair of positioning members 18 having an engaging part 17 at the corresponding fringe part of an insulating separator 5 extending in the longitudinal direction of conductor and stretching between the opposite fish plates 6, 6 for jointing the side plates of duct are commonly engaged with the engaging part 17 of each insulating separator 5. The bus duct is provided with the tolerance in the breadthwise direction at a part of the positioning member 18 secured with fish plate 6 for jointing the side plates of duct.

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 a connection device for a bus duct which is of a type in which insulating coated conductors are in close contact with each other or of which the phase is reduced.

[0002]

2. Description of the Related Art A bus duct of the above type includes a conductive connecting member for in-phase conductors, an insulating separator between different-phase conductors, an insulating separator between outermost conductors and a duct side plate joint plate, and a duct side plate joint plate. , And a connection unit consisting of a batch tightening bolt with an insulating coating is previously assembled to the end of one bus duct, and the end of the other bus duct to be connected oppositely is inserted and fitted into the connection unit, and the tightening bolt is attached. And tighten the nuts fitted to the bolts together,
There is a conductor end butting type connecting device in which the corresponding open surface of the connecting portion is covered with a cover (for example, Japanese Utility Model Publication No. 46-30142).
Issue).

Further, the end portions of the conductors of the same phase of the bus duct to be connected are overlapped with each other, and the insulating separators are sandwiched between the conductors of different phases and between the outermost conductor and the duct side plate joint plate. There is a conductor end overlap type connecting device in which a nut is fitted into a bolt with an insulating coating that penetrates through an insulating separator and a conductor and tightened together, and a corresponding open surface of the connecting portion is covered with a cover. The duct side plate joint plate of the connecting device of the conductor end portion superposition method may be integrally formed on the end portion of the housing of the bus duct body, or may be prepared separately from the housing.

Instead of the collective tightening bolts penetrating the conductor and the insulating separator, one or two pairs of bolts are provided between the duct side plate joint plates at the symmetrical positions in the width direction of the conductor avoiding the connecting point of the conductor and the insulating separator. By inserting it and tightening it via a leaf spring (corresponding to a spring washer) that is commonly fitted to the pair of bolts on the outside of each duct side plate joint plate,
There is a bus duct connecting device in which three members, that is, a duct side plate splicing plate, a connecting portion of a conductor and an insulating separator are collectively pressure-bonded and fixed (for example, Japanese Utility Model Publication No. 50-112997).

[0005]

In any of the above-mentioned conventional bus duct connecting devices, since the insulating separator and the conductive connecting member are not fixed to the conductor, the conductor connecting ends are inserted and fitted together. At the time of connection, the insulating separator and the conductive connecting member may be displaced in the width direction of the conductor and also in the length direction of the conductor depending on the connection type, which takes time and effort to align them. Further, the insulating separator and the conductive connecting member may rotate together with the tightening of the collective tightening bolts, and the bus ducts may be connected to each other while the insulating separator and the conductive connecting member are displaced from the specified position. There was a risk that it would end up.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the conventional connection apparatus for a bus duct for tightening each phase, such as an insulation-covered conductor contact type and a phase reduction type. When mating and connecting, the insulating separator and the conductive connecting member do not shift in the width and length directions of the conductor, so that the conductor connection end can be easily inserted and fitted, and the bus duct can be connected straight and correctly. . Another object of the present invention is to obtain a bus duct connecting device with good workability that can prevent co-rotation of the insulating separator and the conductive connecting member when tightening the collective tightening bolts.

In order to achieve the above-mentioned object, the present invention is to face the in-phase conductor ends to be connected with each other or to add a conductive connecting member thereto, or to overlap the in-phase conductor ends to be connected, In a bus duct connecting device formed by interposing insulating separators between the different-phase conductors and between the outermost conductors and the duct side plate joint plate and collectively tightening them with a fastening tool, along the conductor length direction of each insulating separator The corresponding edges have engaging portions, and the pair of positioning members provided between the opposing duct side plate joint plates are commonly engaged with the engaging portions of the insulating separators. Then, a margin is provided in the width direction of the bus duct at the position where the positioning member is fixed to the duct side plate joint plate.

[0008]

[Operation] When the bus duct is connected, the displacement of the insulating separator and the conductive connecting member in the conductor width direction and the length direction is commonly engaged with the engaging portions of the corresponding edges along the conductor length direction of each insulating separator. It is restrained by the positioning member. Further, co-rotation of the insulating separator and the conductive connecting member at the time of collective tightening by the fastener is also suppressed by the positioning member. The difference between the intervals between the duct side plate joint plates in the temporarily tightened state and the final tightened state of the collective tightening / fastening tool is absorbed by the tolerance of the fixing portion between the duct side plate joint plate and the positioning member.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a bus duct connecting device according to the present invention will be described with reference to the drawings. Fig. 1 shows the insulated conductor 3
It is a disassembled perspective view of the butt | coupling type connection part of a wire type bus duct. At the opposite ends of the bus ducts 1 and 2 that are connected to each other, a gap S is formed between the adjacent conductors 3 and 3 of each bus duct, and between the outermost conductor 3 and the duct side plate 4 so that the insulating separator 5 enters.

A connection unit is formed by a duct side plate joint plate 6 that is screwed on the inner surface of the duct side plate 4 in a screw manner, an insulating separator 5, a conductive connecting member 7, and a bolt 8 with an insulating coating as a collective tightening fastener. 9 is composed. Then, the connection unit 9 is preliminarily assembled by temporarily tightening the bolt 8 with the insulation coating inserted in the center of the duct side plate joint plate 6, the insulating separator 5, and the conductive connecting member 7. 1
Reference numerals 0, 11, and 12 denote spring washers, flat washers, and nuts fitted to the bolts 8 with an insulating coating, and 13 denotes a cover that closes the corresponding open surface of the bus duct connecting portion.

The conductive connecting member 7 is a rectangle which is smaller than the insulating separator 5 and is substantially similar to each other. The connecting member 7 is fitted and positioned inside the four L-shaped convex portions 14 formed at the corners of the connecting member 7 on the surface of the insulating separator 5 that is in contact with the conductor. The height of the conductor 3 is on both sides in the conductor width direction of the bolt through hole 15 in the center of the connecting member 7 (which is common to the central bolt through holes of the insulating separator 5 and the duct side plate joint plate 6). There is a pair of convex portions 16 slightly lower than half of the above, and the insertion depth position of the conductor 3 when the conductor 3 of each bus duct 1 or 2 is inserted into the connection unit 9 is determined, and the tip of the inserted conductor 3 is determined. Prevents the bolt from hitting the peripheral surface of the shaft portion of the bolt 8 (see FIGS. 2 to 4). The above configuration is substantially the same as the conventional configuration.

Engagement portions 17, 17 that are L-shaped notches at a pair of corners located in the conductor width direction of each insulating separator 5.
(See the enlarged view) is formed, and the pair of rectangular rod-shaped positioning members 1 provided between both duct side plate joint plates 6 and 6.
8 and 18 are L-shaped engaging portions 17 and 1 of each insulating separator 5.
7 are commonly engaged. That is, each insulating separator 5
Is fixed by a pair of positioning members 18 in a shape sandwiched from above and below in the figure. The positions of the engaging portions 17, 17 of the insulating separator 5 are not limited to the corners in the illustrated example, but may be anywhere on the corresponding edges (see FIG. 5) along the conductor length direction of each insulating separator 5. Good. As shown in the illustrated example, it is sufficient for the positioning member 18 and the engaging portion 17 to have a pair of engaging portions on both sides in the width direction of the conductor 3.

The shape of the engaging portion 17 and the shape of the corresponding cross section of the positioning member 18 are arbitrary. For example, the rod shape in FIG. 1, other cylindrical or flat plate shape, or channel shape (see FIG. 5) is appropriate. Further, the material of the positioning member 18 is appropriately made of metal such as steel, aluminum or stainless steel, or hard synthetic resin.

In the embodiment shown in FIG. 1, plate pieces 19 bent into a substantially Z shape are fixed by welding or the like to the respective positioning member mounting portions on the inner surface of the duct side plate joint plates 6, 6 facing each other. 19 is a threaded hole 20 formed in a portion floating from the joint plate 6 (see the enlarged view), and a hole having a diameter larger than the head of a screw 23 formed in the joint plate 6 corresponding to the screw hole 20. The positioning member 1 from the outside of the joint plate 6 through 21.
A head screw 23 is screwed into and fixed to the screw hole 22 on the end face of No. 8.

Instead of mounting two Z-shaped plate pieces 19 symmetrically, as shown by a chain line 24, Z is attached to both ends of a long strip.
An integrally formed bent portion may be attached to the inner surface of the duct side plate joint plate 6. The portion of the Z-shaped plate piece 19 that is floating from the duct side plate joint plate 6, that is, the portion where the screw through hole 20 is open, is bent to bend the joint plate 6.
It is possible to approach and separate from.

As shown in FIG. 1, between the ends of the bus ducts 1 and 2 arranged facing each other with a predetermined gap, the connection unit 9 in a temporarily assembled state (in the connection unit 9 by temporarily tightening the bolt 8). The distance between the conductive connecting members 7 facing each other is kept a little wider than the thickness of each conductor 3 of the bus ducts 1 and 2, and the end portions of the duct side plate joint plates 6 are the side plates 4 of both bus ducts 1 and 2. Of the different phase conductors 3 and 3 toward the bus duct 1 on the side of the positioning member 18 as shown in FIGS. 2 and 3.
The insulating separator 5 is inserted into the space S and between the outermost conductor 3 and the duct side plate joint plate 6. At that time, since the pair of positioning members 18 are engaged with the insulating separator 5 in the connection unit 9, the insulating separator 5 is not displaced. The side plate 4 and the duct side plate joint plate 6 of the bus duct 1 which are overlapped inside and outside are fixed with screws 25.

Next, as shown by the arrow in FIG. 2, the bus duct 2 on the opposite side of the connecting unit 9 assembled to the bus duct 1 is connected to the insulating separator 5 with the conductive connecting members 7 facing each other. The conductors 3 are inserted so that the conductors 3 fit into the spaces between the conductors 5. The duct side plate joint plate 6 and the side plate 4 of the bus duct 2 overlapping the outer surface of the duct side plate joint plate 6 are also fixed by the screws 25 in the same manner as described above.

Then, by fully tightening the bolts 8, as shown in FIG. 4, the bus duct connecting portions are tightened together via the connecting unit 9. At that time, since the positioning member 18 is engaged with the insulating separator 5, the insulating separator 5 does not rotate together with the tightening of the bolt 8. The width of the connection unit 9 is slightly different between when the bolt 8 is fully tightened and when the bolt 8 is temporarily tightened before that. The error in the width of the connection unit 9 before and after the final tightening of the bolt 8 is caused by the bending of the portion of the Z-shaped plate piece 19 floating from the duct side plate joint plate 6, that is, the portion supporting the positioning member 18. The absorption is adjusted automatically.

The pair of rectangular rod-shaped positioning members 18, 18 provided between the duct-side plate joint plates 6 and 6 are provided on the end surface of the positioning member 18 through holes formed in the duct-side plate joint plate 6 from the outside thereof. It can also be fixed by screwing a head screw or the like into the screw hole of. In that case, the error in the width of the connection unit 9 before and after the main tightening of the bolt 8 can be absorbed and adjusted by the tightening degree of the positioning member mounting screw.

The corresponding open surfaces of the connecting portions of the bus ducts 1 and 2 that have been connected are covered with the covers 13 to close them. The cover 13 has a shallow box shape and the bus duct 1
-Fixed by screws 29 which are fitted to the outside of the side plate 4 of No. 2 and screwed into the duct side plate joint plate 6 from the outside of the cover 13 through the holes 28 of the side plate 4.

FIG. 5 shows another embodiment of the engaging portion between the insulating separator 5 and the positioning member 18 and the mounting portion between the duct side plate joint plate 6 and the positioning member 18, and shows the conductor length of the insulating separator 5. U-shaped or U-shaped notch 17 at a symmetrical position on the corresponding edge along the direction.
・ 17 is formed. A long U-shaped or U-shaped notch 26 along the conductor width direction is made at the position where the duct side plate joint plate 6 is attached to the positioning member.
The free end 27 of the notch 27 formed by
A is bent inward to form an L-shape.

Both ends of the pair of channel-shaped positioning members 18, 18 passed between the insulating separators 5, 5 are overlapped with the bent end portions 27A of the cut pieces 27, and one bent edge 18A of the member 18 is overlapped. Is engaged with the bent end 27A and the other bent edge 18B
Are engaged with the engaging portion 17 of the insulating separator 5. The positioning member 18 and the duct side plate joint plate 6 are fixed by a headed screw 23 that penetrates the overlapping portion of the positioning member 18 and the bent end portion 27A. The error in the width of the connection unit 9 before and after the final tightening of the collective tightening bolt 8 is automatically absorbed and adjusted by bending the notch piece 27.

In FIG. 6, the end portions of the bus ducts 1 and 2 are inserted into each other and the end portions of the conductors 3 of the same phase are overlapped with each other. For a bus duct connecting device of a type in which an insulating separator 5 interposed between the joint plate 6 and the outermost conductor 3, each conductor 3, and a bolt 8 penetrating the insulating separator 5 interposed between the different-phase conductors 3 and 3 are collectively tightened. It is a perspective view before the connection of the example which implemented the present invention.

The bolt 8 for collective tightening is preliminarily passed through one of the bus ducts 1 and is in a temporarily tightened state, and the gap in which the conductor 3 on the other side and the insulating separator 5 are inserted in this state is kept a little wide. There is. In both of the bus ducts 1 and 2 to be connected, the insulating separator 5 is held by the conductor 3 but is not completely fixed. A pair of the collective tightening bolts 8 are inserted side by side in the width direction of the conductor 3.

The front corners of the insulating separator 5 of the bus duct 1 through which the collective tightening bolts 8 pass and the rear corners of the insulating separator 5 of the mating bus duct 2 are arranged in the above-mentioned FIG.
Similar to the above case, an L-shaped notched engaging portion 17 is formed. The positioning member 18 provided between the duct side plate joint plates 6 is commonly engaged with the engaging portion 17 of the insulating separator 5 of the bus duct 2 through which the collective tightening bolt 8 does not pass.

The insulating separator 5 is made up of the positioning member 18.
When the bus duct 2 on the side of pressing is inserted into the bus duct 2 through which the bolt 8 passes, the positioning member 18 engages with the engaging portion 17 of the insulating separator 5 of the counterpart bus duct 1, and the insertion dimension of the bus duct 2 is restricted. In addition, the displacement of the insulating separator 5 is prevented. In this state, the bolts 8 are tightened to collectively connect the bus duct connecting portions.

A U-shaped or U-shaped notch 26 along the conductor width direction is made at the position where the duct side plate joint plate 6 is attached to the positioning member, and the notch piece 27 formed by the notch 26 is passed through the free hole. Screw with head 2
3 is screwed and fixed in the screw hole of the end surface of the positioning member 18. The error in the width of the bus duct connecting portion before and after the final tightening of the collective tightening bolts 8 is automatically absorbed and adjusted by the bending of the cut piece 27.

The embodiment described above shows the case where the collective tightening bolt is applied to the bus duct connecting portion penetrating the conductor, but the structure is such that the collective tightening bolt is passed through the bolt at a position avoiding the conductor and the insulating separator, that is, Apply a leaf spring to the outside of the duct side plate joint plate in the width direction of the conductor, and tighten the bolts through the holes at both ends of the plate spring and the duct side plate joint plate to tighten the bus duct connection parts together. Can also implement the present invention. Also, in an air-insulated bus duct in which a bare conductor is arranged, a connection part in which conductors of multiple phases are lined up, such as a connection part for collectively tightening the conductors via an insulating separator, is collectively tightened with one or more screw parts. It is also possible to implement it.

[0029]

As described above, according to the present invention, the pair of positioning members provided between the duct side plate joint plates are commonly engaged with the engaging portions at the corresponding edges along the conductor length direction of each insulating separator. Therefore, the insulating separator (including the conductive connecting member includes the connecting member) is always held at a predetermined position in the longitudinal direction and the width direction of the conductor end portion.
Therefore, when the bus duct ends are connected to each other, the conductor ends can be easily inserted and fitted. Also, in order to prevent co-rotation of the insulating separator (including the connecting member in the case of having a conductive connecting member) when tightening the collective tightening fasteners such as bolts, connect the bus ducts in a straight and accurate manner. You can

Since the position where the positioning member is fixed to the duct side plate joint plate has a margin in the width direction of the bus duct, the connecting unit that occurs when the collective tightening fastener is temporarily tightened and when it is finally tightened. The width error is adjusted so that it does not hinder the tight connection of the bus duct.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an example in which the present invention is applied to a butt connection portion of a three-wire bus duct in which an insulation-coated conductor is closely attached.

FIG. 2 is a plan view showing a state during connection of the butt connection portion.

FIG. 3 is a vertical cross-sectional front view showing the inside of the butt joint portion during connection.

FIG. 4 is a partially cross-sectional plan view showing a state in which the connection of the butt joint is completed.

FIG. 5 is an exploded perspective view of another embodiment of the connection unit of the butt connection section.

FIG. 6 is an exploded perspective view of an example in which the present invention is applied to a superposition type connection portion of a three-wire bus duct in which an insulation-coated conductor is closely attached.

[Explanation of symbols]

 1 Bus Duct 2 Bus Duct 3 Conductor 4 Side Plate 5 Insulating Separator 6 Duct Side Plate Joint Plate 7 Conductive Connection Member 8 Collective Tightening Fixture (Bolt) 9 Connection Unit 13 Cover 17 Engagement Part 18 Positioning Member 19 Z-shaped Plate Piece 23 Head Screws 26 Notches 27 Notches

Claims (2)

[Claims] 1. An in-phase conductor end to be connected is made to face each other and a conductive connecting member is added thereto, or an in-phase conductor end to be connected is superposed, and between the different-phase conductors and the outermost conductor. In a bus duct connecting device in which an insulating separator is interposed between a duct side plate joint plate and they are collectively tightened by a fastener, each insulating separator has an engaging portion at a corresponding edge along the conductor length direction. A bus duct connecting device, wherein a pair of positioning members provided between the opposing duct side plate joint plates are commonly engaged with the engaging portions of the insulating separators. 2. The bus duct connecting device according to claim 1, wherein the fixing portion between the positioning member and the duct side plate joint plate has a margin in the width direction of the bus duct.