JPH0733541Y2 - Laminated structure of electrical junction box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a laminated structure of an electric junction box used for electric wiring of an automobile or the like, which has been improved to facilitate its assembly. is there.

2. Description of the Related Art An electric junction box is generally assembled by laminating components such as a lower case 1, a bus bar 2 and a wiring board assembly 4 including an insulating plate 3 and an upper case 5 as shown in FIG.

In order to position the stacking layers, the two pilot holes 6, 6 are formed in each component P'as shown in FIG.
6'is provided in the longitudinal direction of the member, and two pilot pins 7,7 'which are erected on the jig base Q' penetrate through the holes 6,6 'and are sequentially stacked and assembled.

The clearance between the pin 7 and the hole 6 on one side is extremely small and there is almost no play, but the pin 7'and the hole 6'on the other side are holes so that the dimensional accuracy of the constituent members P'can be absorbed and laminated. 6'is formed in a vertically elongated hole to increase the clearance in the Y-axis direction.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above laminated structure, if the two holes 6 and 6'are on the Y-axis when the electrical junction box is relatively small, the distance l between them is short, so that Variations are likely to appear greatly, making it difficult to stack, and lower case 1 to upper case 5
In some cases, it may not be possible to fit them completely, and it takes time to redo the assembly.

SUMMARY OF THE INVENTION An object of the present invention is to provide a laminated structure capable of reducing the play at the time of laminating each component of the electric junction box as much as possible and facilitating the assembling work.

Means for Solving the Problems In order to achieve the above object, the laminated structure of the electric junction box of the present invention is, as shown in FIG. 1, a lower case 1, a bus bar 2 and an insulating plate 3 which constitute the electric junction box. 2 pilot holes 8 and 8'are provided in each component such as the wiring board assembly 4 and the upper case 5, and two pilot pins 9 and 9'standing on the jig base Q are installed in the pilot holes. In the structure in which the respective constituent members are laminated by penetrating through the 8,8 ', the two pilot holes 8,8' are provided in the vicinity of diagonal corners of the respective constituent members and one pilot hole 8'is provided. Is formed as a long hole along the diagonal direction.

That is, the pilot holes 8 and 8'are the corners A and B in the diagonal line R direction of the constituent members represented by the symbol P in FIG.
Is provided at a position where the distance l'between the holes is maximized. The one pilot hole 8 has the clearance of the pilot pin 9 as small as possible, and the other pilot hole 8'is formed as a long hole along the diagonal line R direction.

In FIG. 1, the wiring board assembly 4 is an example in which a plurality of bus bars 2 are provided on both front and back surfaces of the insulating plate 3, but it may be provided on only one surface. Usually, two or more layers are laminated. The bus bar 2 is formed with tab terminals 10 extending in the vertical direction, and these tab terminals 10 penetrate through the tab holes (not shown) provided in the insulating plate 3 and both cases 1 and 5 to form a fuse cavity. 11, It is led out into the connecting portion such as the connector inserting portion 12 for connecting the wire harness. The wiring board assembly 4 may be assembled at a place different from the lower case 1 and the upper case 5, and as shown in FIG. 1, the lower case 1, the bus bar 2, the insulating plate 3, the bus bar 2 may be mounted on the jig base Q. You may laminate | stack sequentially like this.

As shown in FIG. 3 action, any point S on the line segment R and its extension between 'the distance l ₀ Hall 8,8' two pilot holes 8, 8, the interval between the T and the hole 8 Where l ₁ and l ₂ respectively and the clearance between the pilot hole 8 ′ and the pilot pin 9 ′ are d, clearances (backlash) d ₁ and d _{2 in} a direction orthogonal to the line segment R at arbitrary points S and T. Are represented by d ₁ = dl ₁ / l ₀ and d ₂ = dl ₂ / l ₀ , respectively.

Clearly l ₁ / l ₀ <1, so pilot hole 8,
By arranging the interval 8'at the farthest position of each constituent member P (1,2,3,5) of the electric junction box, all the constituent members P can be suppressed within the play d of the pilot hole 8 '. Therefore, the stacking work can be facilitated and the automation by the machine can be smoothly performed.

As described above, according to the present invention, when the constituent members of the electrical junction box are stacked by using the pilot pins, the play between the constituent members is greatly reduced. Assembly becomes easy, and defects such as poor fitting between the lower case and the upper case are extremely reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a laminated structure of an electric junction box of the present invention, FIG. 2 is a plan view of a member P representing each laminated member of the same, and FIG. 3 shows the same operation. Explanatory drawing and FIG. 4 are plan views of a conventional example. 1 ... Case, 2 ... Bus bar, 3 ... Insulation plate, 4 ... Wiring board assembly, 5 ... Upper case, 8, 8 '... Pilot hole, 9,
9 '... Pilot pin, P, P' ... Component (of electric junction box), Q, Q '... Jig stand.

Claims (1)

[Scope of utility model registration request] 1. Two pilot holes are provided in each component such as a lower case which constitutes an electric junction box, a wiring board assembly including a bus bar and an insulating plate, and an upper case, and two pilot holes are erected on a jig stand. In an assembly structure in which a plurality of pilot pins are pierced through the pilot holes to stack the respective constituent members, the two pilot holes are provided in the vicinity of diagonal corners of the respective constituent members and one pilot hole is provided. A laminated structure of an electrical junction box, which is formed as a long hole extending in the diagonal direction.