JP2752013B2 - Circuit formation method by bus bar - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bus bar constituting an internal circuit in an electric junction box or the like used for interconnecting wire harnesses, and more particularly to a circuit forming method using the bus bar.

[0002]

2. Description of the Related Art Connection point groups 3B and 3 shown in FIG.
C and two bus bars having connection point groups 3D and 3E are used, and one of the bus bars is connected to the connection point 3A to the specified wire harness to form the circuit A or the circuit B (FIG. 4A ), (B)), the bus bar 5A has a three-branch configuration having connection points 3A, 3B and 3C, and the bus bar 5B has connection points 3A, 3D and 3E.
The bus bar 5 is formed in a three-branch configuration having
Connection points 3A are provided in both A and 5B.
A tab-shaped contact portion 6 is provided upright at each connection point of the bus bars 5A, 5B and the like to form each connection point, and is connected to the relay 4 or the wire harness 2.

When the circuit A is formed, the connecting portion of the connection point 3A of the bus bar 5B is cut (cut at the position indicated by 7 "in the figure), and the bus bar 5A and the bus bar 5B obtained by cutting the connection point 3A are used. 1 to form a circuit A of FIG.

When the circuit B is formed, the connection point 3A of the bus bar 5A is cut (cut at a position 7 'in the figure), and the bus bar 5B and the bus bar 5A with the connection point 3A cut are arranged in a joint box. Figure 4
The circuit B of (B) is formed.

In the above-described circuit forming method, two common connection point groups are connected by two bus bars, respectively, and one of the two bus bars is connected to another specific connection point to form two types of circuit. In forming A and B, the same bus bars 5A and 5B each having two connection point groups 3B and 3C and 3D and 3E and a specific connection point 3A are used, and a part thereof is cut to have the same configuration. Different circuit A for joint box 1
Alternatively, the circuit B is alternatively formed (Japanese Patent Laid-Open No. 61-66 / 1986).
386).

[0006]

However, in the above-mentioned prior art, two types of bus bars 5A, 5B which are independent from the beginning despite being arranged on the same wiring board.
The bus bar 5A,
5B could not be assembled together on the wiring board. For this reason, a step of separately assembling the bus bars 5A and 5B on the wiring board is required, and there has been a problem of an increase in equipment costs due to an increase in man-hours and an increase in assembling work time.

[0007] Conventionally, two or more types of bus bars have been connected to each other and assembled on the same wiring board at the same time. However, in this case, the connecting portion is simply connected to two or more types of bus bars. The bus bar only plays a role, and is cut and removed when the bus bar is separated, and there is a problem that the material is wasted.

[0008] The present invention has been made in view of the above problems, and it is possible to connect two or more types of bus bars to each other while effectively using a material.
A bus bar that can reduce the number of work steps by assembling more than one type of bus bar on the same wiring board at the same time, and can easily change the circuit by selectively providing tab terminals on either bus bar An object is to provide a circuit forming method.

[0009]

In order to achieve the above object, a method for forming a circuit using a bus bar according to the present invention comprises the steps of connecting two or more bus bars connected to each other by a connecting piece having a width that can be a tab terminal on the same wiring board. Simultaneously assembling the above, then cutting the connecting piece portion to separate the two or more busbars, respectively, and then bending the connecting piece to selectively select one of the two or more busbars. There is a procedure in which a tab terminal is provided in the device.

[0010]

According to the circuit forming method using busbars of the present invention, two or more busbars are connected to each other by connecting pieces, so that these two or more busbars can be assembled simultaneously on the same wiring board, Work man-hours can be reduced. Further, the tab terminals can be selectively provided on any of the bus bars depending on the cutting position of the connecting piece, so that the circuit can be easily changed. Further, after the busbar is separated, the connecting piece plays a role as a tab terminal, so that the material can be effectively used.

[0011]

FIG. 1 shows an electric junction box X, in which bus bars Y are provided on each of the laminated wiring boards x, and tab terminals y bent from the bus bars Y are connected to fuse insertion portions P,
It is configured to protrude from various insertion parts such as a relay insertion part Q and a connector insertion part R.

[0012] Figure 2, bus bar _{Y 1} and bus bar _{Y 2} is in a state of being connected by a connecting piece _{y 1,} shows a state of being assembled onto the wiring board x, connecting piece _{y 1} are bus bar _Y 1, already it has the same width as the tab terminal y ₂ which are erected in Y _2. In the above, the connecting piece bus bar to _{y 1} by cutting the dotted _{L 1} moiety _{Y 1} and bus bar _{Y 2} tab terminal _{y 1} in the bus bar _{Y 2} by bending the coupling piece _{y 1} by the dotted line _{L 2} portion with separating Is formed (FIG. 2B).

[0013] On the other hand, bus bars Y by bending the coupling piece _{y 1} by the dotted line _{L 2} portion with separating bus bars _{Y 1} and bus bar _{Y 2} by cutting the connecting piece _{y 1} by the dotted line _{L 3} parts
₁ , a tab terminal y ₁ ″ is formed (FIG. 2C).

[0014] Incidentally, the cutting and bending of the connecting piece y ₁ in after assembling the bus bars Y ₁ and bus bar Y ₂ on the wiring board x is, for example, carried out simultaneously by the press mold. Here, when cutting the connecting piece y ₁ is pressed against the cutting blades to the connecting piece y ₁ by the pressing force so as not to damage the wiring board x.
In the case of bending the connecting piece y ₁ is provided with a through-hole press die is inserted in a position corresponding to the connecting piece y ₁ of the wiring board x, enables the upright connecting piece y ₁ on the wiring board x And

According to the circuit forming method using the bus bars of this embodiment, the two or more bus bars Y ₁ and Y ₂ are connected to each other by the connecting piece y ₁ , so that these two or more bus bars Y _{1 are used.} , can be assembled simultaneously Y ₂ on the same wiring board, it is possible to achieve a reduction in man-hours. Further, since the tab terminal y ₁ ′ or y ₁ ″ can be selectively provided on one of the bus bars Y ₁ , Y ₂ depending on the cutting position of the connecting piece y ₁ , the circuit can be easily changed. After the separation of the bus bars Y ₁ and Y ₂ , the connecting piece y ₁ serves as the tab terminal y ₁ ′ or y ₁ ″, so that the material can be effectively used.

In this embodiment, two types of bus bars Y are used.
_1, has been described for connecting a Y _2, actually, many kinds of bus bars are assembled on the same wiring board. As described above, as the number of bus bars to be assembled on the same wiring board increases, the effects of the present invention such as reduction in the number of assembling steps, facilitation of circuit change, and effective use of materials become more remarkable.

[0017]

As described above, according to the circuit forming method using the bus bars of the present invention, the material can be effectively used while
More than two types of busbars can be connected to each other, and by combining these two or more types of busbars simultaneously on the same wiring board, the number of work steps can be reduced. In addition, a tab terminal can be selected for any busbar The circuit can be easily changed by providing such a circuit.

[Brief description of the drawings]

FIG. 1 is a partially broken perspective view of an electric junction box.

FIG. 2A is a perspective view of a plurality of busbars supplied on an arrangement plate in a connected state, FIG. 2B is a perspective view of a state in which tab terminals are separated and one of the busbars is formed, and FIG. FIG. 4 is a perspective view of a state where a tab terminal is formed on the other bus bar separately.

FIG. 3 is a perspective view of a bus bar used for forming a circuit in a conventional example.

4A and 4B show separate circuits formed using the bus bar shown in FIG.

[Explanation of symbols]

Y ₁ , Y ₂ bus bar y ₁ connecting piece y ₂ tab terminal y ₁ ′, y ₁ ″ tab terminal

Claims (1)

(57) [Claims] 1. At least two types of busbars connected to each other by a connecting piece having a width that can be a tab terminal are simultaneously assembled on the same wiring board, and then the connecting piece is cut to separate the two or more types of busbars. A method of forming a circuit using a bus bar, wherein each of the two or more bus bars is selectively provided with a tab terminal by separating the connection pieces and thereafter bending the connection piece.