JPH1070817A - Bus connecting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bus connecting structure wherein easy connection is enabled without adjustment when positional deviation exists between switchboard units, and assembling workability in a site is improved. SOLUTION: In this bus connecting structure 10, the part between bushing conductors 11b, 11b of penetrating bushings 11, 11 protruded from a pair of switchboard units 10A, 10B are connected by using a pipe-shaped conductor 15b of a bus bar 15, via a pair of tulip contacts 12, 12 which absorb positional deviation between the conductors 11b, 11b. When positional deviation is generated between the units 10A, 10B, the contact 12 absorbs the positional deviation and makes the connection between the conductors 11b, 11b possible without adjustment. Thereby the connection between conductors 11b, 11b is enabled even if positional deviation between the units 10A, 10B is large, by connecting both ends of the bus bar 15 to the conductors 11b by using the two contacts 12, 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bus connection structure for electrically connecting a switchboard unit having a built-in circuit breaker with a bus bar, and more particularly to a bus connection structure using a spring connection member such as a tulip contact. About.

[0002]

2. Description of the Related Art As a conventional bus connection structure, for example, as shown in FIGS. 6A and 6B, there is a structure applied between a pair of switchboard units 2A, 2A of an air insulation type. In the busbar connection structure 1A, a flat plate conductor 3 made of a copper strip or the like protruding in the left-right direction from the switchboard unit 2A is sandwiched between a pair of flat connection adapters 4 and 4 provided with holes 3a for fastening, and bolts 5a are bolted. The switchboard units 2A are connected to each other by being inserted into the holes 3a and fastened with nuts 5b.

Further, as a conventional bus connection structure, for example, as shown in FIG. 7, there is a structure applied between a pair of solid insulation type switchboard units 2B, 2B. This busbar connection structure 1B is connected to a pipe-shaped conductor 7 projecting from the front or rear surface of the switchboard unit 2B and partially exposed from a solid insulator 6 such as a mold resin by a single tulip contact 8. Cover the connection. The tulip contact 8 presses the finger conductor 8a against the pipe-shaped conductors 7, 7 by means of a fastening spring 8b at both ends of the finger conductor 8a, and connects the pipe-shaped conductors 7, 7 to each other. Pipe-shaped conductor 7, 7
By using the tulip contact 8 for the connection between them, the connection can be made possible even if there is some displacement between the switchboard units 2B, 2B.

[0004]

However, according to the conventional busbar connection structure 1A shown in FIG. 6, since it is a bolted structure, only the clearance between the bolt 5a and the hole 3a can be adjusted, so that the switchboard units 2A, 2A. In the on-site installation work described above, if there is a positional shift between the switchboard units 2A, 2A, fine adjustment is required during the bus connection work, and the bus connection structure 1A may need to be disassembled and reassembled on site.

A conventional bus connection structure 1B shown in FIG.
According to this, since the pipe-shaped conductors 7, 7 are connected by one tulip contact 8, the switchboard units 2B,
The allowable range of the positional deviation between 2B is not so large. Moreover, since the tulip contact 8 is moved in the axial direction by hand or a jig or the like to connect between the pipe-shaped conductors 7 and 7, if there is a positional shift between the switchboard units 2 </ b> B and 2 </ b> B, the pipe-shaped conductors Since it is necessary to move the step at the end of 7 while bending the tulip contact 8, the workability deteriorates.

Accordingly, an object of the present invention is to provide a bus connection structure which enables easy connection without adjustment even if there is a positional shift between the switchboard units, thereby improving the on-site assembly workability. Is to do.

[0007]

According to the present invention, there is provided a bus connecting structure for connecting conductive members projecting from a front or rear surface of a pair of switchboard units by buses, wherein both ends of the buses are It is characterized in that it is connected to the conductive member by a pair of spring connecting members that absorb a displacement between the conductive member and the conductive member.

[0008] According to the above configuration, the spring connection member absorbs the positional shift even if the positional shift occurs between the switchboard units, and enables connection between the conductive members without adjustment. Therefore, by connecting both ends of the bus bar to the conductive member using a pair of spring connection members, connection between the conductive members is possible even if the positional shift between the switchboard units is large.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view showing a bus connection structure according to an embodiment of the present invention. This busbar connection structure 10 includes, for example, a pair of solid insulation type switchboard units 10A, 10B, through-hole bushings 11, 11 protruding from the front or rear surface thereof, and a tulip as a pair of left and right spring connection members between the through-hole bushings 11, 11. It is configured to be connected by a bus bar 15 via contacts (hereinafter, abbreviated as “contacts”) 12, 12, and a tulip contact support (hereinafter, abbreviated as “support”) that supports the contact 12 inside the contact 12. )
13, and an insulating cover 14 is provided outside the bus bar 15.

The through bushing 11 has a T-shaped bushing conductor 11b as a conductive member covered with a bushing insulating mold 11a. The bushing conductor 11b has an internal thread 11c formed on the inner surface, and one of the left and right bushing conductors 11b and 11b has a right-hand thread and the other has a left-hand thread.

The contact 12 is a finger conductor 12a
The finger conductor 12a is pressed against the bus-shaped conductor 15b and the bus-shaped conductor 15b, which will be described later, by the tightening springs 12b wound around both ends of the bus bar 15, so that electricity can be supplied between the bushing conductor 11b and the pipe-shaped conductor 15b. It is assumed that. Finger conductor 12a
Is provided with a locking groove 12c with which a locking piece 13g of the support 13 described later is engaged.

The support 13 has a bushing conductor 11 on its outer surface.
A male screw 13e screwed to the female screw 11c of FIG.
The directions of the screws are different on the left and right corresponding to the bushing conductor 11b. In addition, the support 13 includes the contact 12
13g that engages with the locking groove 12c.
Thus, the contact 12 is moved with the movement of the support 13.
Can be moved.

The bus bar 15 comprises a pipe-shaped conductor 15b covered with an insulating mold 15a, and an insulating cover 14 arranged on the outer periphery of the insulating mold 15a and movable in the axial direction.

The insulating cover 14 is for insulating and reinforcing the space between the bushing insulating mold 11a and the busbar insulating mold 15a.

FIG. 2 is a view taken in the direction of the arrow A in FIG. 1 for explaining the relationship between the contact 12 and the support 13. Support 13
Is provided with a gear-shaped recess 13c on the outer peripheral surface of the locking piece 13g,
The finger conductors 12a are arranged at equal intervals. Thereby, when the support 13 is rotated,
The contact 12 can be moved without the finger conductor 12a rotating integrally with the support body 13 and dropping into the slit 15c described later at the end of the pipe-shaped conductor 15b.

FIG. 3 is a perspective view showing the relationship between the support 13 and the pipe-shaped conductor 15b of the bus bar 15. As shown in FIG. The pipe-shaped conductor 15b has slits 15c and fixing pins 16 at both ends.
And a hole 15d in a direction perpendicular to the slit 15c for preventing the bus bar 15 from dropping out by inserting the same. The support 13 includes a flat plate portion 13a corresponding to the slit 15c of the pipe-shaped conductor 15b, a cylindrical portion 13b having an outer diameter slightly smaller than the inner diameter of the pipe-shaped conductor 15b, and a gear-shaped recess 13d on which the finger conductor 12a is supported. And a gear-shaped projection 13c for preventing circumferential displacement of the finger conductor 12a.
And an elongated hole 13f provided in the cylindrical portion 13b along the axial direction to prevent the bus bar 15 from falling off. Thereby, the slit 15c of the pipe-shaped conductor 15b
When the bus bar 15 is rotated with the slit 15c inserted into the flat plate 13a, the slit 15c tends to fall off the flat plate 13a when the slit 15c is close to being perpendicular to the ground. Since the bus bar 15 is restricted by the hole 13f, it is possible to prevent the bus bar 15 from falling off during rotation.

Next, the operation of attaching the bus bar 15 will be described with reference to FIGS. At the end of the through bushing 11 before the bus bar 15 is attached, the flat plate portion 13a of the support plate 13 is exposed. First, the operator rotates each support 13, 13 so that the left and right flat plate portions 13 a, 13 a are parallel to the insertion direction of the bus bar 15, and changes the orientation of the slit 15 c of the bus bar 15 to the flat plate portion 1.
3a, the bus bar 15 is inserted through the bushing 11,1.
Insert between one. In this state, insert the fixing pin 16 and
The bus bar 15 is prevented from falling off during rotation. Next, the operator rotates the bus bar 15. When the bus bar 15 rotates, the supports 13 at both ends of the bus bar 15 rotate integrally with the bus bar 15, and the female screw 11c on the inner surface of the bushing conductor 11b and the male screw 13e of the support 13 act to support the left and right support members 13. , 13 move to the pipe-shaped conductor 15b side, and the bushing conductor 11b and the pipe-shaped conductor 15b are brought into conduction by the contacts 12, 12. After the movement of the contact 12 is completed, the operator passes the right and left insulating covers 14, 14 through the bushing 1.
1 and the operation of attaching the bus bar 15 is completed.
The removal of the bus bar 15 is performed in a procedure reverse to the procedure described above.

According to the above configuration, since both ends of the bus bar 15 are connected by the pair of contacts 12, 12, even if there is a positional deviation (core deviation, angular deviation) between the switchboard units 10A, 10B during installation on site. , Without the adjustment, the contacts 12 at both ends of the bus bar 15 absorb the displacement,
Can be easily connected. Further, since the contacts 12, 12 at both ends can be moved only by rotating the bus bar 15, it is possible to improve the on-site assembly (attachment) property. Further, by rotating the bus bar 15 in the reverse direction, the contacts 12, 12 at both ends can be returned to the original positions, and the bus bar 15 can be easily removed from the through bushing 11. The cylindrical portion 13b of the support 13 is
Since the bus bar 15 is inserted into the pipe-shaped conductor 15b with a slight gap when the mounting is completed, it is possible to prevent the contact 12 from receiving an excessive force such as bending due to the load of the bus bar 15. At the same time, the bushing conductor 11
b and the pipe-shaped conductor 15b can be connected at a slight angle.

The present invention is not limited to the above-described embodiment, and various embodiments are possible.

[0020]

As described above, according to the present invention, since both ends of the bus are connected to the conductive member using a pair of spring connecting members, no adjustment is made even if there is a positional shift between the switchboard units. Can be easily connected.
As a result, on-site assembly workability can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a bus connecting structure according to the present invention.

FIG. 2 is a diagram illustrating a relationship between a tulip contact and a tulip contact support according to the present invention.
FIG.

FIG. 3 is a perspective view showing a relationship between a tulip contact support according to the present invention and a pipe-shaped conductor of a busbar.

FIG. 4 is a cross-sectional view for explaining an assembling operation in the busbar connection structure according to the present invention.

FIG. 5 is a cross-sectional view for explaining an assembling operation in the busbar connection structure according to the present invention.

6A and 6B are diagrams showing a conventional bus connection structure applied between a pair of switchboard units of the air insulation type, wherein FIG. 6A is a plan view and FIG. 6B is a front view.

FIG. 7 is a diagram showing a conventional bus connection structure applied between a pair of solid insulation type switchboard units.

[Explanation of symbols]

 Reference Signs List 10 bus connection structure 10A, 10B switchboard unit 11 penetrating bushing 11b bushing conductor 11c female screw of bushing conductor 12 tulip contact 13 tulip contact support 13e female screw of tulip contact support 14 insulating cover 15 busbar 15b pipe conductor

Continued on the front page (72) Inventor Sachio Tazawa 5-1-1 Hidakacho, Hitachi City, Ibaraki Prefecture Inside the Hidaka Factory, Hitachi Cable Co., Ltd. (72) Inventor Hitoshi Kobayashi 5-1-1 Hidakacho, Hitachi City, Ibaraki Prefecture No. 1 Inside the Hidaka Plant of Hitachi Cable, Ltd.

Claims (5)

[Claims] 1. A bus connection structure for connecting conductive members protruding from the front or rear surfaces of a pair of switchboard units by buses, wherein both ends of the buses absorb a displacement between the conductive members and a pair of springs. A bus connection structure, wherein the bus connection structure is connected to the conductive member by a connection member. 2. The busbar connection structure according to claim 1, wherein both ends of said busbar are fastened and connected to said conductive member by screw fastening members. 3. The busbar connection structure according to claim 1, wherein both ends of said busbar are connected to said conductive member by screwing members of different directions. 4. The busbar connection structure according to claim 2, wherein both ends of said busbar are engaged with said screw fastening member by inserting said busbar between said conductive members. 5. A structure in which both ends of the bus bar are connected to the conductive member by moving the spring connection member along the bus bar by fastening with the screw fastening member.
5. The bus connection structure according to 3 or 4.