JPH07336849A - Structure of bus duct connecting section - Google Patents

Abstract

PURPOSE:To eliminate boring work from parts by constituting one of a pair of side plates arranged on both sides of a laminated structure in the thickness direction of a plate spring member and coupling the structure with the side plates by utilizing the pressing force of the plate spring member by putting the structure between the side plates. CONSTITUTION:At the time of connecting bus ducts 12 to each other, the conductors 22 of bus bars 14, 16, and 18 are exposed by removing the insulating coatings 24 of the bars 14, 16, and 18 from the end sections of the bars 14, 16, and 18 protruding from a case 20 over prescribed lengths. Then platy insulating members 26 and 28 and a connection cover 30 are arranged in the connecting section of the ducts 12. The cover 30 is provided with a pair of lid plates 32 and side plates 34. Each lid plate 32 is composed of a metallic plate and each side plate 34 is composed of a plate spring member. The side plates 34 are arranged so that the plates 34 can cover both sides of the bars 14, 16, and 18 and their central parts 34A can be expanded in the direction in which the sections 34A approach each other. Therefore, the manufacturing process of a bus duct connecting section can be simplified and the manufacturing cost of the section can be reduced, since the ducts 12 are connected to each other by utilizing the pressing forces of the plate spring members without requiring any boring work.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact insulation type bus duct connecting portion structure.

[0002]

2. Description of the Related Art FIG. 2 shows an example of a conventional connecting structure of a contact insulation type bus duct. In the structure of the connecting portion shown in FIG. 2, the insulating coating is removed at the tip end of each of the bus bars 3 protruding from the cases 1 and 2 of each bus duct, and the conductor 4 is exposed. Among the conductors 4, in-phase conductors 4 are closely adhered and overlapped. An insulating member 5 is arranged between different phases of the conductors 4 and the conductors 4 are overlapped with each other.
Similar insulating members 5 are arranged on the outermost sides of both. The laminated structure composed of the conductor 4 and the insulating member 5 is tightened between the side plates 9 of the connection cover 8 by tightening an insulating bolt 7 provided with an insulating sleeve 6 penetrating these, thereby connecting both bus ducts. To be done.

[0003]

However, in the structure of the connecting portion shown in FIG. 2, it is necessary to form a hole for allowing the insulating bolt 7 to pass through in each of the conductor 4 and the plurality of insulating members 5 of each bus bar 3. There is. Therefore, in the manufacturing process of the connecting portion, a process of making holes in the conductors 4 of the bus bar 3 and the insulating members 5 is indispensable, which complicates the manufacturing process and hinders reduction of manufacturing cost.
In addition, such a hole is made in the conductor 4 and the insulating member,
This causes a reduction in the strength of the component, which is not preferable in reducing the size of the component, and in turn, reducing the size of the connecting portion. Therefore, an object of the present invention is to eliminate the need for the work of drilling parts,
It is intended to simplify the manufacturing process and reduce the manufacturing cost.

[0004]

DISCLOSURE OF THE INVENTION The present invention provides a laminated structure composed of a plurality of conductors from which the insulating coating is removed at the respective tip portions of a plurality of bus bars protruding from the case of each bus duct and a plate-shaped insulating member. As means for tightening, at least one of a pair of side plates, which are arranged on both sides in the plate thickness direction of this laminated structure and whose both ends are respectively coupled to the ends of the case, is composed of a plate spring member. It is characterized in that the laminated structure is sandwiched and coupled with the other side plate by the pressing force of.

[0005]

In the bus duct connecting portion structure according to the present invention, the laminated structure composed of the conductor and the plate-shaped insulating member is coupled by the pressing force of the leaf spring member arranged on at least one of both sides in the plate thickness direction. . Therefore, the conductor of each bus bar,
It is possible to reliably connect the conductors of the same phase of each bus bar without making a hole in any of this and the insulating members arranged in a laminated shape.

[0006]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is a perspective view showing a bus duct connecting portion structure 10 according to the present invention in an exploded state. Bus ducts 12 and 12 to which the connection structure 10 of the present invention is applied
Are three-phase bus bars 14, 16 and 1 in the example shown.
8 and a case 20 of rectangular cross section that houses each busbar 14, 16 and 18. The bus bars 14, 16 and 18 are appropriately held by being sandwiched by the case 20 in a state in which the insulating coating 24 covering the conductors 22 is in close contact. Further, the end portions of the bus bars 14, 16 and 18 projecting from the case 20 are formed on both bus ducts 12 and 12 respectively.
The insulation coating 24 is removed over a predetermined length for the connection of the conductors, so that the conductor 22 is exposed. Both cases 20 are arranged facing each other with a space therebetween so that the conductors 22 of the bus bars protruding from the ends thereof overlap each other.

A total of four plate-like insulating members 26 and 28 and a connecting cover 30 are arranged at the connecting portions of the bus ducts 12 and 12. The plate-shaped insulating members 26 and 28 are made of an insulating material such as epoxy resin. A head 26A is formed on one side of the pair of first plate-shaped insulating members 26 so as to project to both sides in the plate thickness direction, and on the other side, the plate thickness is reduced on both sides in the plate thickness direction. A tail portion 26B is formed. Also, a pair of second
On one side of the plate-shaped insulating member 28, a head portion 28A that projects only on one surface is formed. On the other side of each of the second plate-shaped insulating members 28, a tail portion 28B that reduces the plate thickness is formed on one surface of the head portion 28A, and the other surface of the plate-shaped insulating member 28 is , A nearly flat surface.

The connection cover 30 includes a pair of cover plates 32 having a generally rectangular planar shape and a pair of side plates 34. Each lid plate 32 has a length dimension sufficient to cover the space between the cases 20 of both bus ducts 12. Each lid plate 32 is made of a metal plate such as an iron plate similar to the conventional one. On the other hand, the pair of side plates 34 is composed of a leaf spring member 34 such as metal. Each leaf spring member 34 has a height dimension that is slightly smaller than the height dimension of the case 20 so as to cover both sides of each bus bar 14 to 18, and is also slightly smaller than the distance between both case 20. Has a wide width dimension. Each leaf spring member 34 is formed in an arc shape as a whole so that a substantially flat central portion 34A overhangs one surface. Both leaf spring members 34 are arranged such that the central portions 34A thereof bulge in directions toward each other.

FIG. 3 is a plan view showing a state in which the two bus ducts 12 and 12 are connected to each other with a part of one cover plate 32 cut away, and FIG. 4 is a front view thereof. The conductors 22 of each busbar 14, 16 and 18 are arranged so that the busbars of the same phase with the same number are connected to each other so that the busbars of the same phase are connected to each other.

In order to prevent a short circuit between the bus bars 14, 16 and 18 of different phases, a first plate-like insulating member 26, which is an insulating spacer, has a head 26A and a tail 26B between the conductors 22 of different phases. It is arranged in the opposite direction. Further, the second plate-shaped insulating member 2 which is a similar insulating spacer is provided outside each of the conductors 22 located on the outermost side.
8 is arranged so that the flat surface of the head portion 28A thereof does not project outwards. This second plate-shaped insulating member 28 also
The head portion 28A and the tail portion 28B are arranged in directions opposite to each other.

Due to this reverse orientation, each first and second plate-like insulating member 26 and 28 has its head 26.
A and the adjacent conductor 22 in the step portion defined by 28A.
Face the tip of the. Further, each bus bar 14 to 1 adjacent to each other at the step portion defined by the tail portions 26B and 28B.
8 faces the edge of the insulating coating 24. As a result, the insulating members 26 and 28 and the conductor 22 are connected to each other between the members.
2 performs a positioning action in the longitudinal direction. Therefore, the assembly work of the laminated structure including the conductor 22 and the plate-shaped insulating members 26 and 28 can be relatively easily performed.

A pair of leaf spring members 34 of the connection cover 30.
Covers the laminated structure composed of the conductor 22 and the plate-shaped insulating members 26 and 28 from both sides in the plate thickness direction,
Will be placed. The connection cover 30 has a central portion 34.
The central portions 34A are arranged so as to bulge in directions toward each other so as to come into contact with the second insulating member 28 located on the outermost side at A. Both ends of each leaf spring member 34 are fixed to a fixing seat 36 provided at an edge portion of the corresponding case 20 with a screw member 38 (see FIG. 4). By fixing the plate spring member 34, the conductor 22 and the plate-shaped insulating member 26,
The laminated structure composed of 28 receives the spring force of the plate spring member 34 as a pressing force between the plate spring members 34, and is clamped by this pressing force. By this tightening, the in-phase conductors 22 of each bus bar are securely electrically connected.

The leaf spring member 34 forms a part of the connection cover 30 by covering both sides of the bus ducts 12 between the cases 20. After the leaf spring member 34 is fixed, the pair of cover plates 32 are fixed to the case 20 by the screw member 40 so as to close the upper and lower portions between the case 20. The pair of cover plates 32, together with the pair of leaf spring members 34, form a cover 30 that covers the connecting portions of the bus bars 14 to 18, and also connect the cases 20 of both bus ducts 12.

In the connection structure 10 according to the present invention, the laminated structure composed of the conductors 22 of the bus bars 14, 16 and 18 of both bus ducts 12 and 12 and the plate-like insulating members 26 and 28 is composed of a pair of leaf spring members 34. The spring force reliably tightens the plate in the thickness direction. By this tightening, the conductors 22 of the bus bars of the same phase of the bus duct 12 are in close contact with each other and are securely electrically connected. Therefore, in order to connect the bus duct 12, it is not necessary to provide the conductor 22 of the busbars 14, 16 and 18 and the plate-like insulating members 26 and 28 with holes for penetrating the insulating bolt as in the conventional case. As a result, the step of making holes in these members 22, 26, and 28 is unnecessary, and the manufacturing process can be simplified and the manufacturing cost can be reduced.

Further, the conductor 22 and the plate-like insulating member 26,
Since it is not necessary to pierce 28 with a bolt, it is possible to give flexibility to the positional relationship between the members when assembling these members. For this reason, it is not necessary to use the high processing precision required for each component that constitutes the connection portion, and it is possible to reduce the manufacturing cost also from this aspect. Furthermore, since the conductor 22 and the plate-shaped insulating members 26 and 28 are not perforated, the conductor 22 and the plate-shaped insulating members 26,
Since the strength of the parts is relatively increased without lowering the strength of 28, the downsizing of the parts of the bus duct connecting portion,
As a result, the size of the bus duct connecting portion can be reduced.

In the above description, an example in which both of the pair of side plates 34 are constituted by leaf spring members and each leaf spring member 34 constitutes both side portions of the connection cover 30 has been described. 34 is formed of a metal plate that forms a highly rigid wall body instead of the plate spring member, and the conductor 22 and the plate-shaped insulating members 26 and 28 are formed between the metal plate and the plate spring member 34. The laminated structure can be sandwiched. In addition, the pair of leaf spring members 34 are configured by strip-shaped leaf spring members having a height dimension that is too small to cover the conductor 22, and the side plates of the connection cover are configured by new side plates different from the plate spring members. You can also However, as described in the illustrated embodiment, both of the pair of side plates are formed of leaf spring members in order to more firmly connect the connecting portions and reduce the manufacturing cost due to the reduction in the number of parts. It is preferable to configure both sides of the connection cover with leaf spring members.

[0017]

As described above, according to the present invention,
Since the laminated structure including the conductor and the plate-shaped insulating member is coupled by the pressing force of the leaf spring member arranged on at least one of the both sides in the plate thickness direction, the laminated structure is not attached to either the conductor or the insulating member of each bus bar. The bus duct can be properly connected without making a hole. Therefore, the step of boring the conductor and the insulating member is not required in the manufacturing process, so that the manufacturing process can be simplified and the manufacturing cost can be reduced. Further, since the conductor and the plate-shaped insulating member are not provided with holes, the strength of the parts is not reduced due to the drilling, and the size of the parts of the bus duct connecting part is reduced, and further the size of the bus duct connecting part is reduced. be able to.

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing an exploded structure of a bus duct connecting portion according to the present invention.

FIG. 2 is a plan view showing a structure of a conventional bus duct connecting portion with a part thereof cut away.

FIG. 3 is a plan view showing a bus duct connecting portion structure according to the present invention with a part thereof broken away.

FIG. 4 is a front view showing a structure of a bus duct connecting portion according to the present invention.

[Explanation of symbols]

 12 bus duct 14, 16, 18 bus bar 20 case 22 conductor 24 insulating coating 26, 28 plate-like insulating member 34 pair of side plates

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Motokane Izumi 2-1-1 Oda Sakae, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture, Showa Electric Wire & Cable Co., Ltd. (72) Shigetoshi Yamamoto Sakae Oda, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture 2-1-1 No. 1 Showa Cable Denki Co., Ltd. (72) Inventor Hiroshi Kaburagi 2-1-1 1-1 Showa Densen K.K. (72) Inventor Masaaki Ezaki Kawasaki, Kanagawa 2-1-1 Oda Sakae, Kawasaki-ku, Ichi, Showa Electric Wire & Cable Co., Ltd.

Claims (3)

[Claims] 1. A conductor is housed in each of a pair of cases which are arranged with their ends facing each other at a distance from each other, and the insulating coating is removed at each of the tips projecting from the ends of the cases to form conductors. A bus duct connecting portion structure for electrically connecting a plurality of exposed bus bars by superposing them on each other in the same phase, wherein the bus duct connecting parts are arranged between different phases of the conductors superposed on each other and on both outermost sides of the conductors superposed on each other. A plurality of plate-shaped insulating members, and a pair of side plates arranged so as to cover the laminated structure composed of the conductor and the plate-shaped insulating member from both sides in the plate thickness direction, and both ends of which are respectively coupled to the ends of the case. At least one of the pair of side plates comprises a leaf spring member that applies a pressing force to the other side plate of the laminated structure. Connection structure. 2. The bus duct connecting portion structure according to claim 1, further comprising a connection cover that covers between the both cases, the connection cover including a pair of cover plates and a pair of side plates, A bus duct connecting portion structure, wherein each of the pair of side plates comprises a leaf spring member. 3. The bus duct connection part structure according to claim 2, wherein each of the leaf spring members has an arc shape as a whole so as to swell in directions toward each other.