JP3386956B2 - Bus connection structure and bus connection method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a busbar connecting structure for electrically connecting switchboard units with built-in circuit breakers by busbars (busbars), and more particularly to a busbar connecting structure using spring connecting members such as tulip contacts. Regarding

[0002]

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

As a conventional busbar connecting structure, for example, as shown in FIG. 7, there is a busbar connecting structure which is applied between a pair of solid insulation type switchboard units 2B and 2B. In this busbar connecting structure 1B, a pipe-shaped conductor 7 that is partly exposed from a solid insulator 6 such as a mold resin, which projects from the front surface or the rear surface of the switchboard unit 2B, is connected by one tulip contact 8, and an insulating cover 9 is used. It covers the connecting part. The tulip contact 8 presses the finger conductors 8a against the pipe-shaped conductors 7 and 7 by fastening springs 8b on both ends of the finger-shaped conductors 8a to connect the pipe-shaped conductors 7 and 7. Pipe-shaped conductor 7,7
By using the tulip contacts 8 for the connection between the switchboard units 2B, 2B, even if there is a slight positional deviation between the switchboard units 2B, 2B, the connection can be made possible.

[0004]

However, according to the conventional busbar connecting structure 1A shown in FIG. 6, since it is a bolt tightening structure, only the clearance between the bolt 5a and the hole 3a can be adjusted, and therefore the switchboard units 2A, 2A. In the on-site installation work, if there is a displacement between the switchboard units 2A and 2A, fine adjustment may be required at the time of the busbar connection work, and the busbar connection structure 1A may need to be disassembled and reassembled locally.

Further, the conventional busbar connecting structure 1B shown in FIG.
According to the above, since the pipe-shaped conductors 7, 7 are connected by one tulip contact 8, the distribution board unit 2B,
The allowable range of misalignment between 2B is not so large. Further, since the tulip contact 8 is moved in the axial direction manually or by a jig or the like to connect the pipe-shaped conductors 7 to each other, when there is a positional deviation between the switchboard units 2B and 2B, the pipe-shaped conductors Since it is necessary to move the step of the end portion 7 of the tulip while bending the tulip contact 8, workability deteriorates.

Therefore, an object of the present invention is to provide a busbar connecting structure which enables easy connection without any adjustment even if there is a positional deviation between the switchboard units, thereby improving assembly workability on site. To do.

[0007]

Means for Solving the Problems The present invention to achieve the above object, a first feature, when connecting the bus between the conductive member out pair of collision, and the conductive member and both ends of the bus Spring connection member support inside the connection part of
Connected to each other by the body, and connected to both ends of the bus bar and the conductive
The outside of the connecting portion with the member is the spring connecting member.
In busbar connection structure for connecting each by the locked spring connection members <br/> so that the support integral with the
One side of the spring connecting member support is connected to both sides of the bus bar.
A slight gap in the radial direction inside the pipe-shaped conductor at the end
Provided and fixed, the other side of the spring connection member support
The side of is attached to the screw provided inside the conductive member.
Characterized in that it is screwed. The second feature is that the pair
Busbar connection structure for connecting between protruding conductive members by a busbar
In the construction, first, the pipe-shaped conductors at both ends of the bus bar are
Inside the body, when one side is fixed,
A spring with a thread cut on the other side on the other side
Fixing the one side of the connecting member support, then,
Rotate the busbar with the screws fixed on both sides of the busbar
The screws on both sides of the bus bar inside the conductive member.
The spline is simultaneously screwed into the worn screw.
Springs that are locked together with the support member
From the outside of the bus bar and the conductive member by a connecting member.
Both sides of the bus bar are simultaneously connected.

According to the above structure, the spring connecting member absorbs the positional deviation even if the positional deviation occurs between the switchboard units and enables the connection between the conductive members without adjustment. Therefore, by connecting both ends of the bus bar to the conductive member using the pair of spring connection members, the conductive members can be connected even if the positional deviation between the switchboard units is large.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view showing a busbar connecting structure according to an embodiment of the present invention. This busbar connecting structure 10 has, for example, a tulip as a pair of left and right spring connecting members provided with protruding through bushings 11 and 11 from the front surface or the rear surface of a pair of solid insulation type switchboard units 10A and 10B. Tulip contact supports (hereinafter abbreviated as “supports”) that support the contacts 12 inside the contacts 12 are configured to be connected by bus bars 15 via contacts (hereinafter abbreviated as “contacts”) 12, 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 its inner surface, and one of the left and right bushing conductors 11b and 11b has a right-hand thread and the other side has a left-hand thread.

The contact 12 is a finger conductor 12a.
With the tightening springs 12b wound around both ends of the finger conductor 12a, the finger conductors 12a are pressed against the pipe-shaped conductors 15b and the bushing conductors 11b as the busbars of the busbar 15 described later, and the electricity can be applied between the bushing conductors 11b and the pipe-shaped conductors 15b. It is what Finger conductor 12a
Has a locking groove 12c with which a locking piece 13g of the support 13 described later is engaged.

The support 13 has an outer surface on which the bushing conductor 11 is provided.
A male screw 13e that is screwed into the female screw 11c of b is formed,
The left and right screws have different screw directions corresponding to the bushing conductor 11b. In addition, the support 13 is the contact 12
It has a locking piece 13g that engages with the locking groove 12c.
As a result, the contact 12 moves as the support 13 moves.
Can be moved.

The bus bar 15 is composed of 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 for explaining the relationship between the contact 12 and the support 13 as seen from the direction of arrow A in FIG. Support 13
Includes 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 finger conductor 12a rotates integrally with the support 13, and the contact 12 can be moved without dropping the finger conductor 12a into a 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. The pipe-shaped conductor 15b has slits 15c and fixing pins 16 at both ends.
Is provided with a slit 15c for preventing the bus bar 15 from falling off and a hole 15d in a direction perpendicular to the slit 15c. The support 13 includes a flat plate-shaped 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 for supporting the finger conductor 12a. And a gear-shaped convex portion 13c for preventing displacement of the finger conductor 12a in the circumferential direction.
And a long 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 in a state in which the slit 15c is inserted into the flat plate portion 13a, the slit 15c tries to fall from the flat plate portion 13a in a state where the slit 15c is nearly vertical to the ground, but the fixing pin 16 is long. Since it is regulated by the hole 13f, the bus bar 15 can be prevented from falling off during rotation.

Next, the work of mounting the bus bar 15 will be described with reference to FIGS. 4 and 5. 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 the support bodies 13 and 13 so that the left and right flat plate-shaped portions 13a and 13a are parallel to the insertion direction of the bus bar 15, and the slit 15c of the bus bar 15 is oriented in the flat plate-shaped portion 1.
3a, the bus bar 15 is passed through the bushing 11,1.
Insert between 1 In this state, insert the fixing pin 16,
The bus bar 15 is prevented from falling off during rotation. Next, the worker rotates the bus bar 15. When the bus bar 15 rotates, the supports 13, 13 at both ends of the bus bar 15 rotate together with the bus bar 15, and by the action of the female screw 11c on the inner surface of the bushing conductor 11b and the male screw 13e of the support 13, the left and right support members 13 are formed. , 13 are moved 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 contacts 12 is completed, the worker penetrates the left and right insulating covers 14 and 14, respectively, to penetrate the bushing 1
Then, the bus bar 15 is moved to the 1 side, and the attachment work of the bus bar 15 is completed.
The bus bar 15 is removed in the reverse order of the above procedure.

According to the above construction, since both ends of the bus bar 15 are connected by the pair of contacts 12, 12, even if there is a positional deviation (center deviation, angular deviation) between the switchboard units 10A, 10B during field installation. , The contact 12 at both ends of the bus bar 15 absorbs the positional deviation without adjustment,
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 assembling (mounting) property at the site. Also, by rotating the bus bar 15 in the opposite direction, the contacts 12, 12 at both ends are returned to their original positions, and the bus bar 15 can be easily removed from the through bushing 11. In addition, 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 bus bar 15 is completely attached, it is possible to prevent an excessive force such as bending from being applied to the contact 12 under the load of the bus bar 15. At the same time, the bushing conductor 11 is absorbed by absorbing the positional deviation of the through bushing 11.
b and the pipe-shaped conductor 15b can be connected at a slight angle.

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

[0020]

As described above, according to the present invention, since both ends of the busbar are connected to the conductive member by using the pair of spring connecting members, there is no adjustment even if there is a displacement between the switchboard units. Can be easily connected to.
As a result, it is possible to improve local assembly workability.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a busbar connecting structure according to the present invention.

FIG. 2 is a view for explaining the relationship between a tulip contact and a tulip contact support according to the present invention.
FIG.

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

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

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

6A and 6B are views showing a conventional busbar connection structure applied between a pair of air-insulated type switchboard units, in which FIG. 6A is a plan view and FIG. 6B is a front view.

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

[Explanation of symbols]

10 busbar connection structure 10A, 10B switchboard unit 11 Through bushing 11b bushing conductor 11c Bushing conductor female thread 12 Tulip contact 13 Tulip contact support 13e Female thread of tulip contact support 14 Insulation cover 15 Busbar 15b Pipe-shaped conductor

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Sachio Tazawa, Inventor Sachio Tazawa, 5-1-1 Hidaka-cho, Hitachi City, Ibaraki Prefecture, Hidaka Plant, Nitrate Electric Wire Co., Ltd. (72) Hitoshi Kobayashi, Hidaka, Hitachi City, Ibaraki Prefecture 5-1-1 Machi, Hidaka Electric Cable Co., Ltd. Hidaka Factory (56) Reference JP-A-7-123548 (JP, A) JP-A-8-149629 (JP, A) JP-A-7-255107 ( JP, A) JP-A-8-205337 (JP, A) Actually opened 50-113827 (JP, U) Actually opened 54-70084 (JP, U) Actually opened 4-6216 (JP, U) Actually opened 59-51468 (JP, U) Actual development 49-43780 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02G 5/06 H02B 1/20 H01R 4/48

Claims (6)

(57) [Claims] 1. A When connecting the bus between the conductive member out pair of collision, the connection portion between the conductive member and both ends of the bus
The inside of the minute by the spring connection member support
The connecting portion between both ends of the bus bar and the conductive member.
The outside of the minute is integrated with the spring connecting member support
Yo, respectively, depending on the locked spring connecting member contact
In the continuing bus connecting structure, one side of the spring connecting member support is
There are some gaps inside the pipe-shaped conductors at both ends of the
Provided in a fixed direction and fixed,
The other side was screwed inside the conductive member.
Busbar connection structure characterized by being screwed together. 2. One side of the spring connecting member support
Is slightly smaller than the inner diameters of the pipe-shaped conductors on both ends of the bus bar.
Having a large outer diameter, the flat plate and the slit, and the direction perpendicular to the flat plate
Between the pin and the spring connecting member
The long holes in the axial direction allow the pipe-shaped guides at both ends of the bus bar.
The busbar connecting structure according to claim 1, wherein the busbar connecting structure is configured to be gently fixed inside the body . 3. The spring connecting member support body is provided.
The screw has the spring connecting portions at both ends of the bus bar.
The material support is fixed so that they are in different directions.
It is a male screw cut on the outer periphery of a cylindrical shape,
A female screw is cut inside the conductive member to match,
Rotate the bus bar to move the male screws at both ends of the bus bar forward.
Busbar connection structure according to claim 1, wherein the configuration at the same time is fastened to Kishirubeden member inside the internal thread. 4. The ends of the bus bar and the conductive member are the
By the screw provided on the pulling connection member support ,
At the same time when the inside of the connecting part is fastened ,
Bus of claim 1, wherein the ring connecting member support integrally become so locked configuration in which the spring connecting member is outside of both ends the connecting portion to move along each said bus in said bus is connected Connection structure. 5. A bus bar connects between a pair of protruding conductive members.
In the continuing bus bar connection structure, first, inside the pipe-shaped conductors at both ends of the bus bar,
When one side is fixed so that they are in different directions
Spring connection member support with cut screw on the other side
The busbar fixed to the one side of the holding body, and then the screws on both sides of the busbar
By rotating the screws on both sides of the bus bar to the conductive member.
While simultaneously screwing together the screws provided inside the
The spring connecting member is locked so as to be integrated with the support.
The busbar and the conductive member by means of a spring connecting member
Both sides of the bus bar are connected simultaneously from the outside of
And how to connect the busbar. 6. One of the spring connection member supports
Is slightly inside the pipe-shaped conductors at both ends of the bus bar.
It is characterized in that it is fixed by providing a gap in the radial direction.
The busbar connecting method according to claim 5, wherein