JP3156833B2 - How to connect wires to busbars - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a wire of the connection between the bus bar and the electric wire in the electrical junction box to the busbar you to ensure
It relates to the connection method.

[0002]

2. Description of the Related Art FIG. 7 shows a conventional means for connecting an electric wire to a bus bar described in Japanese Utility Model Laid-Open Nos. 55-140271 and 64-9411. The electric wire connecting means is provided on a narrow strip-shaped bus bar 30 provided on an insulating wiring board of an electric connection box (not shown).
a, and the core wire 31 is connected to the bus bar 30 with an electrode or the like (not shown).
In this method , a is fixed by welding, and the electric wire 31 is connected to the bus bar 30.

However, in the above-mentioned electric wire connection means ,
The connection portion 32 between the bus bar 30 and the core wire 31a of the electric wire 31 is excellent in electrical characteristics but inferior in mechanical characteristics. This is because, when the electric wire 31 is moved up, down, left, and right, the core wire 31a comes off from the connection portion 32. In order to prevent this, Japanese Patent Application Laid-Open No. 4-172908
In the publication, as shown in FIG. 8, an insulated wiring board 33 and an electric wire holding boss 34 of an electric connection box (not shown) are provided.
The electric wire 35 is held between the electric wire holding bosses 34, and the movement of the electric wire 35 in the vertical and horizontal directions is suppressed.

[0004] However, when the bus bar and the electric wires (both not shown) are connected at a position distant from the insulating wiring board 33 and then the bus bar is transferred to the insulating wiring board 33, the electric wires move up, down, left and right. For this reason, the connection between the bus bar and the electric wire may be disconnected, and the quality of the electric connection box may be deteriorated.

[0005]

SUMMARY OF THE INVENTION In view of the foregoing, the present invention has been made in such a manner that after the bus bar is connected to the electric wire, the electric wire is detached from the bus bar even if the bus bar is arranged on the insulating wiring board of the electric connection box. no, not the quality of the electrical connection box is a worse
And to provide a wire connection to the blanking bus bar.

[0006]

In order to achieve the above object, a method for connecting an electric wire to a bus bar according to the present invention comprises the steps of connecting an electric wire mounting piece to at least one end of the bus bar, A method of connecting an electric wire to a busbar with an electric wire fixing portion having two sets of insulator caulking pieces erected at appropriate intervals on both side edges in the direction to form an electric wire fixing portion. And placing the exposed core portion of the electric wire between the insulator caulking pieces, caulking the insulator covering portion of the electric wire with the insulator caulking piece, and exposing the exposed core wire and the electric wire. This is a method of connecting an electric wire to a bus bar for welding a mounting piece .

In another method , a pair of opposing first insulator caulking pieces are erected at least on both side edges of one end of the bus bar, and are appropriately spaced from the first insulator caulking pieces. And connecting the electric wire to a busbar with an electric wire fixing portion having another set of second insulator caulking pieces standing up to form an electric wire fixing portion. The exposed core wire is positioned between the first and second insulator crimping pieces, and the insulator cover portion of the electric wire is crimped with the first and second insulator crimping pieces, and a wire connection methods to bus bars of welding the core wire and the end.

According to the present invention, the exposed core portion is located between the two sets of insulator caulking pieces. Two sets of insulator crimping pieces respectively crimp the insulator covering portion, and the insulator covering portion is fixed to one end of the electric wire mounting piece or the bus bar. Thereby, even if an electric wire is moved up and down and right and left, an insulating covering part does not come off from an electric wire insertion part or one end of a bus bar.

[0009] In addition, while being crimped by the insulator crimping piece of the insulator covering portion, the exposed core wire portion is welded to the bus bar. Thus, when the insulator covering portion is first crimped, the exposed core wire portion is not twisted or displaced, so that the electric wire is placed and fixed on one end of the electric wire mounting piece or the bus bar. In addition, if the exposed core portion is welded first, the insulator covering portion will not be twisted or displaced, so that the wire is placed and fixed on one end of the wire placing piece or the bus bar.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the implementation of the method of the invention.
1 is a view showing a first embodiment of a bus bar with an electric wire fixing portion used for the present invention. The busbar 1 with an electric wire fixing portion is formed by connecting an electric wire mounting piece 3 on which an electric wire 15 is mounted to at least one end of a strip-shaped busbar 2, at both longitudinal edges 3 ′, 3 ″ of the electric wire mounting piece 3. An electric wire fixing portion 6 comprising a set of first insulator crimping pieces 4 and another set of second insulator crimping pieces 5 erected at an appropriate distance from the first insulator crimping pieces 4. Are formed on the bus bar 2. The width of the electric wire mounting piece 3 is the electric wire 15
Can be changed in accordance with the thickness of the object.

One set of the first insulator caulking pieces 4 is a wire mounting piece 3.
And a pair of first insulator crimping pieces 4a and 4b which stand up and oppose both side edges 3 'and 3 "of the electric wire mounting piece 3. A pair of second insulator crimping pieces 5a, 5b are provided on the edges 3 ', 3 "at an appropriate distance from the pair of first insulator crimping pieces 4a, 4b in the circumferential direction.

The first and second insulator crimping pieces 4 on the left side
One end of the bus bar 2 is connected between the bus bars 2 and 5b. The pair of insulator caulking pieces 4a and 4b are provided on the left side of one side edge 3 'and the other side edge 3 "of the wire mounting piece 3, and a pair of insulator caulking pieces 5a are provided. , 5b are side edges 3 '
And the right edge of the side edge 3 ″.

First and second insulator crimping pieces 4a, 5a on the right side
Is a shape in which a rectangle as a lower part and an upper half of an arcuate as an upper part are connected to each other, and the upper part has a curved upper left side. The first and second insulator crimping pieces 4b, 5b on the left side
Is a shape in which a rectangle as a lower portion and an upper half of an arcuate shape as an upper portion are connected to each other, and have a curved shape obliquely rightward and upward.

That is, the right insulator crimping pieces 4a and 5a and the left insulator crimping pieces 4b and 5b have opposite curved portions. This is because each insulator caulking piece 4, 5
This is to prevent the insulator caulking pieces 4 and 5 from overlapping each other when caulking 5 is performed.

FIG. 2 shows a second embodiment of a bus bar with a wire fixing portion used for carrying out the method of the present invention.
The bus bar 1 'with the wire fixing portion is connected to the wire mounting piece 3
An electric wire fixing portion 9 having one longitudinal side edge 3 ′ and two sets of first and second insulator crimping pieces 7, 8 is formed on the bus bar 2.

A pair of first insulator crimping pieces 7 and a pair of second insulator crimping pieces 8 both have an inverted L-shape, each of which has a side edge 3 ′ of the electric wire mounting piece 3. It is formed in a U-shape provided on the left even and right even. Note that it is also possible to provide the insulator caulking pieces 7 and 8 on the other side edge 3 ″ of the electric wire mounting piece 3.

FIG. 3 shows a third embodiment of a bus bar with a wire fixing portion used for carrying out the method of the present invention.
The bus bar 10 with the electric wire fixing portion includes a pair of first insulator crimping pieces 12 erected at opposite ends 11 ′ and 11 ″ of at least one end of the bus bar 11, and a first insulator crimping portion. It has a wire fixing portion 14 composed of another set of second insulator crimping pieces 13 erected at an appropriate distance from the piece 12.

A set of first insulator caulking pieces 12 is a pair of first insulator caulking pieces.
The pair of first insulator crimping pieces 12a and 12b are the insulator crimping pieces 12a and 12b.
11 ". A pair of second insulator crimping pieces 13 is a pair of second insulator crimping pieces 13a and 13b, and a pair of second insulator crimping pieces 13a and 13b is formed. The bus bar 11 is provided upright on each side edge 11 ′, 11 ″.

A pair of first and second insulator crimping pieces 12, 13
Are the same as the pair of first and second insulator crimping pieces 4 and 5 of the first embodiment. As another example, two sets of insulator caulking pieces having the same inverted L shape as in the second embodiment are connected to one side edge 11 ′ (or 1) of the bus bar 11.
1 ").

FIGS. 4 (a), 4 (b) and 4 (c) show a first embodiment of a method for connecting an electric wire to a bus bar according to the present invention. This electric wire connection method is a method of connecting an electric wire to a bus bar 1 with an electric wire fixing portion (FIG. 1) (the bus bar described in the first embodiment). First, the upper wall 20 'of the worktable 20
The electric wire mounting piece 3 of the bus bar 2 is set on a pair of concave fixing bases 21 and 22 arranged in the above.

On the side edge 3 'of the electric wire mounting piece 3, the electric wire 15 has a length equal to or shorter than the distance between the first and second insulator crimping pieces 4a, 5a on the right side. Is removed from the required position, and the core of the electric wire 15 is exposed. Next, the electric wire 15 is mounted on the electric wire mounting piece 3, and the exposed core portion 15 a of the electric wire 15 is arranged between the first and second insulator caulking pieces 4, 5.

An upper electrode 2 for welding which can be moved up and down by, for example, an air pump (not shown) is provided above the work table 20.
3 and a pair of caulking machines 24 and 25 for caulking the first and second insulator caulking pieces 4 and 5 on both sides of the upper electrode 23. The work table 20 has a pair of fixed tables 2.
Since the lower electrode 23 'facing the upper electrode 23 is provided between the upper electrode 23 and the upper electrode 23, the upper electrode 23 and the pair of caulking machines 24 and 25 are connected to the exposed core portion 15a and the first and second crimping devices. 2
In order to exactly hit the insulator caulking pieces 4 and 5, respectively,
The electric wire placement piece 3 and the electric wire 15 placed on the pair of fixing stands 21 and 22 are slightly moved to adjust the positions.

As shown in FIG. 4 (b), the upper electrode 23 and the pair of caulking machines 24 and 25 are simultaneously lowered toward the pair of fixed bases 21 and 22 so that the first and second caulking pieces 4 are formed. , 5 and at the same time, the exposed core 15 a is welded to the electric wire mounting piece 3. As a result, as shown in FIG.
5 is the first and second insulator clamping pieces 4,
The wire core 15 is fixed to the electric wire mounting piece 3 by welding, and the exposed core portion 15 a is welded to the electric wire mounting piece 3, and the electric wire 15 is connected to the bus bar 2.

Therefore, the connection portion is stable even if the electric wire is moved in the X direction or the Y direction. In addition, the electric wire 15 'is connected to the bus bar 1' (FIG. 2) with the electric wire fixing portion described in the second embodiment.
Is connected in the same manner as the above connection method (see FIG. 5).

FIG. 6 shows a second embodiment of the method for connecting an electric wire to a bus bar according to the present invention. This electric wire connection method uses the bus bar 10 with the electric wire fixing portion described in the third embodiment.
This is a method of connecting the electric wire 16 to (FIG. 3). As in the first embodiment of the electric wire connection method, a pair of fixed tables 2 of the work table 20 are used.
One end 11a of the bus bar 11 is set to the first and second 22.

The insulator covering portion 16b is removed from a required position of the electric wire 16 from which one end 16c has been cut to expose the core wire of the electric wire 16. The electric wire 16 is placed on one end 11 a of the bus bar 11, and the exposed core 16 a of the electric wire 16 is arranged between the first and second insulator crimping pieces 12 and 13. A pair of fixed bases 2
One end 11a and electric wire 16 are slightly moved on 1 and 22 to perform positioning.

The upper electrode 23 and the pair of caulking machines 24 and 25 are lowered to caulk the insulator covering portion 16b of the electric wire 16 with the first and second insulator caulking pieces 12 and 13 to expose the exposed core wire. The part 16a is welded to one end 11a of the bus bar 11, and FIG.
The electric wire 16 is connected to the bus bar 11 as shown in FIG.
It is also possible to connect the electric wires to the busbars with wire fixing parts by the methods of the first and second embodiments after disposing the busbars with wire fixing parts in the electrical junction box.

Further, in order to connect a plurality of wires individually to a plurality of bus bars with wire fixing portions, it is possible to cope by moving the upper electrode, the lower electrode, and a pair of crimping machines. It is. Furthermore, if permanently connected to the insulator under the covering portion of the wire to the bus bar by welding the exposed core wire portion of the wire to the bus bar, the shape of the insulator clamping pieces for fixing the insulator to be covering portion is arbitrary.

[0029]

As described above, according to the present invention, since the insulator covering portion does not separate from one end of the electric wire mounting piece or the busbar, the exposed core wire portion and the one end of the electric wire mounting piece or the busbar are not separated from each other. The connection portion is stable, has excellent electrical and mechanical characteristics, and can freely move the bus bar to which the electric wire is connected.

Further, even if the bus bar to which the electric wire is connected is moved, the connection portion is stable, so that it is not necessary to weld the electric wire and the bus bar, for example, in the insulating wiring board of the electric connection box. Therefore, when welding is performed, the wiring of the insulated wiring board can be simplified. Since the wiring of the insulated wiring board becomes simple, the process of connecting the electric wire and the bus bar can be simplified. In addition, since there is no waste in the connection step, the management of the step can be facilitated, and the quality of the electric connection box can be improved.

[Brief description of the drawings]

FIG. 1 shows a method for connecting an electric wire to a bus bar according to the present invention.
FIG. 2 is a perspective view showing a first embodiment of a bus bar with an electric wire fixing portion used for the first embodiment.

FIG. 2 is a perspective view showing a second embodiment.

FIG. 3 is a perspective view showing a third embodiment.

FIGS. 4A and 4B are perspective views showing a method for connecting an electric wire to a bus bar according to the present invention, wherein FIG. 4A shows a state before the electric wire is connected to the bus bar with an electric wire fixing portion of the first embodiment, and FIG. This is a state during connection, and (c) is a state after connection.

FIG. 5 is a perspective view showing a state after an electric wire is connected to the busbar with an electric wire fixing portion of the second embodiment.

FIG. 6 is a perspective view when the bus bar with an electric wire fixing part of the third embodiment is used, wherein (a) is a state before connection and (b) is a state after connection.

FIG. 7 is a perspective view showing a conventional example.

FIG. 8 is a perspective view showing another example.

[Explanation of symbols]

 2,11 bus bar 3 wire mounting piece 4,5 insulator crimping piece 6,14 wire fixing part 12 first insulator crimping piece 13 second insulator crimping piece 15,16 wire

Claims (2)

(57) [Claims] At least one end of a bus bar is connected with an electric wire mounting piece, and two sets of insulator caulking pieces are erected on both side edges in the longitudinal direction of the electric wire mounting piece at appropriate intervals. A method of connecting an electric wire to a busbar with an electric wire fixing portion having an electric wire fixing portion, wherein the electric wire is placed on the electric wire mounting piece, and an exposed core portion of the electric wire is positioned between the insulator crimping pieces. A method for connecting an electric wire to a busbar, comprising: crimping an insulator covering portion of the electric wire with the insulator crimping piece; and welding the exposed core wire and the electric wire mounting piece. 2. A pair of opposing first insulator crimping pieces are erected at least on both side edges of one end of the bus bar, and another set is appropriately spaced from the first insulator crimping pieces. A method of connecting an electric wire to a bus bar with an electric wire fixing portion in which a second insulator crimping piece is erected to form an electric wire fixing portion, wherein the electric wire is placed on the one end and an exposed core portion of the electric wire is formed. Positioning between the first and second insulator crimping pieces, crimping an insulator covering portion of the electric wire with the first and second insulator crimping pieces, and exposing the exposed core wire and the one end. A method of connecting an electric wire to a bus bar, characterized by welding.