JP5157824B2 - Electrical junction box and method of assembling the electrical junction box - Google Patents

Description

  The present invention relates to an electrical junction box and a method for assembling the electrical junction box. Specifically, in an in-vehicle electrical junction box, when an internal circuit material is sequentially inserted into the case and assembled, it is supported by an assembly jig. The identification display unit is effectively used as a mounting surface.

Conventionally, an identification display portion indicating the manufacturer name and product number is attached to the surface of the case in the electrical junction box. The identification display portion is displayed with relatively large characters so that it can be identified at a glance on the appearance.
As described in Japanese Patent Application Laid-Open No. 11-225418 (Patent Document 1), the identification display unit may have a display label. However, since the label is easily peeled off, the identification display unit is As shown schematically in FIG. 8, there are many cases in which a relief is projected from the surface of the case 100.

  Recently, the internal circuit of the electrical junction box has become denser, and therefore, mounting parts for electrical parts such as fuses, relays, connectors, etc. are placed on the surface of the case at a high density, reducing the free space and identifying. Space for providing the display unit has been limited. Therefore, the identification display part is often formed in an empty space at the peripheral edge of the case surface.

On the other hand, for example, when assembling an electrical junction box consisting of a lower case and an upper case,
Mount either the lower case or the upper case on the assembly jig, insert the internal circuit materials such as bus bar, insulating plate, printed circuit board, etc., then cover the other case and lock the cases together Combined to assemble an electrical junction box.

  As shown in FIG. 9, the assembling jig is provided with a frame-like mounting table portion 111 along the inner periphery of the lower surface of the outer peripheral frame 110, and electrical components on the lower surface of the case 120 are mounted on the mounting table portion 111. The peripheral part 121 of the empty space in which no part is provided is placed and supported. At this time, if the area of the peripheral portion 121 of the case 120 mounted on the mounting table 111 is small, the case 120 cannot be supported in a stable state. If the case is not stably supported and the internal circuit materials are sequentially aligned and inserted, and there are portions that fit together, the backlash of the case makes the insertion workability very poor and the fitting member is deformed. May occur.

  As described above, the area of the peripheral edge located on the reference surface of the case surface on which the mounting parts of the electrical components are arranged at a high density on the surface of the case of the electrical junction box and is mounted on the mounting table of the assembly jig Is decreasing. In addition, as described above, if there is an identification display portion protruding from the case surface in the empty space at the peripheral portion of the case surface, the identification display portion can be placed on the mounting table portion 111 of the assembly jig. However, since the shape of the mounting table portion must be changed so as to avoid the protruding identification display portion, there is a problem that the mounting surface on the mounting table portion 111 is increasingly reduced and the case cannot be stably supported.

Japanese Patent Laid-Open No. 11-225418

  The present invention has been made in view of the above problems, and is intended to enable the case to be stably supported during the assembly operation of the electrical junction box by allowing the identification display portion to be placed on the placement table portion of the assembly jig. It is an issue.

In order to solve the above problems, the present invention has an electrical component mounting portion protruding from the reference surface of the case surface, and an identification display portion is provided along the peripheral portion of the case surface.
The identification display unit protrudes a stamped portion from the bottom surface of the recess that is recessed from the reference surface of the case surface, the protruding surface of the stamped portion is positioned at the same height as the reference surface of the case, and the identification display An electrical junction box is provided in which the part is a jig placement surface on which an assembly jig abuts.

As described above, the identification display portion provided in the empty space in the peripheral portion of the case surface is made to protrude the embossed portion from the bottom surface of the recess recessed from the reference surface of the case surface, and the projecting portion of the engraved portion protruded. The surface position is positioned at the same height as the reference plane of the case.
In this way, the stamped part does not protrude from the case reference plane, or is not recessed from the case reference plane, and is positioned at the same height as the case reference plane. The mounting table portion of the jig can be brought into contact, and the entire identification display portion can be used as the jig mounting surface. Thereby, the area mounted on the mounting base part of the assembly jig can be increased, and the case can be stably supported by the assembly jig.

A fuse housing portion, a relay housing portion and a connector housing portion are provided on the surface of the case, and the jig placement surface is the surface of the case where the fuse housing portion, the relay housing portion and / or the connector housing portion is not provided. is there.
The jig placement surface is provided on a surface including at least a part of the peripheral edge of the case surface.

As described above, since the internal circuit of the electrical junction box is arranged at a high density, there are a large number of mounting portions for electrical parts including a fuse housing portion, a relay housing portion, and a connector housing portion provided on the case surface. Therefore, the mounting part is provided with high density in the center area and the peripheral area of the case surface, and the mounting part may be provided up to the peripheral edge, and the identification display part is not provided with the electrical part mounting part. It is provided in an empty space at the periphery of the surface.
Since the identification display section provided in this empty space can be used as a jig placement surface, the reduction of the jig placement surface can be covered, and the electrical connection box can be attached to the assembly jig when the electrical connection box is assembled. Stable support is possible.

Furthermore, the present invention provides a method for assembling the electrical junction box.
In the assembling method, the case supports either the lower case or the upper case with an assembling jig,
In the case of the upper case, it is placed on the assembly jig with the identification display portion facing downward, and the insulating plate, bus bar, and printed board are placed upward from the upper surface opening of the upper case supported by the assembly jig. After that, the lower case is covered and joined to the upper case.

  As described above, in the present invention, since the surface of the embossed marking portion of the identification display portion provided on the case surface is the height of the case reference surface, it can be used as a jig placement surface on the assembly jig. And the case can be stably supported by the assembly jig. As a result, when assembling the electrical junction box, the internal circuit material can be smoothly inserted into the case, and the occurrence of misalignment between the internal circuit materials is suppressed, and the inner circuit material is deformed into a fitting material. There is no fear of occurrence.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The electrical junction box of the embodiment shown in FIG. 1 is mounted on an automobile, and the upper case 2 and the lower case 3 are lock-coupled to form the case of the electrical junction box 1.

  As shown in FIG. 2, a lower layer printed board 5, an insulating board 6, an upper printed board 7, and an insulating board 8 are sequentially stacked from the lower case 3 side in the case consisting of the upper case 2 and the lower case 3. The bus bar 8 is directly fixed to the inner surface of the upper case 2.

  As shown in FIG. 3, the electrical junction box is assembled by reversing the upper case 2 on the mounting base 52 projecting in a substantially frame shape from the lower end inner peripheral surface of the outer peripheral frame 51 of the assembly jig 50. It is inserted into the frame 51, and the peripheral edge of the upper wall 2 a that becomes the lower surface of the upper case 2 is brought into contact with and supported by the upper surface of the mounting table 52. In this state, the insulating plate 8, the upper layer printed board 7, the insulating plate 6, and the lower layer printed board 5 are sequentially inserted and stacked, and then the lower case 3 is put on and the upper case 2 is locked and assembled.

On the upper wall 2a of the upper case 2, as shown in the figure, a fuse accommodating portion 12 is provided on one side, a relay accommodating portion 13 is adjacent to the central region adjacent to the fuse accommodating portion 12, and the relay accommodating portion 13 is adjacent. Thus, the mounting parts for the electrical parts including the connector housing part 14 are arranged with high density up to the other side part.
The peripheral wall of the mounting part of these electrical components protrudes from the reference surface LS of the upper wall 2a, and the part which becomes the reference surface LS at the periphery of the upper wall 2a is indicated by cross diagonal lines in FIG. The surface shown by the cross diagonal lines is a jig placement surface X (X1 to X5) that contacts the placement table 52 of the assembly jig 50.

  As shown in FIGS. 1A and 4, a rectangular identification display portion 11 having a marking portion 10 made of a material name, a product number, and the like in an empty space on the surface periphery of the upper wall 2 a of the upper case 2. Is provided.

  As shown in FIG. 5, the identification display unit 11 is provided with a rectangular recess 15 having a long side along the periphery, which is recessed from the reference plane LS. From the bottom surface 15a of the concave portion 15, a marking portion 10 indicating a material name, a product number, or the like composed of a plurality of characters and / or symbols is provided so as to protrude in a relief shape. The upper surface 10s of these marking portions 10 has the same height as the reference surface LS.

  As described above, in the identification display unit 11, the upper surface 10 s of the marking unit 10 has the same height as the peripheral surface 16 of the reference surface LS surrounding the identification display unit 11, so that the electrical junction box is assembled as shown in FIG. 6. In this case, as shown in FIG. 3, the marking portion upper surface 10 s can be placed on the surface of the placement table portion 52 of the assembly jig 50, and the entire identification display portion 11 is continuous with the peripheral surface 16. X3 can be set.

The other jig placement surface X of the peripheral edge of the upper case upper wall 2a is along the left side 2L in the figure where the fuse accommodating part 12 is located and the right side 2R in the figure where the connector accommodating part 13 is located close. The jig placement surfaces X1 and X2 are very narrow at the portion.
The jig placement surface X3 around the identification display portion 10 along the front side 2F in the drawing has a maximum length and a wide width.
A portion along the rear side 2B in the figure has a wide jig placement surface X4 and a narrow jig placement surface X5.

The mounting table portion 52 of the assembly jig 50 shown in FIG. 7 corresponds to the shape of the jig mounting surface X indicated by cross diagonal lines in the drawing along the periphery of the upper case upper wall 2a shown in FIG. It is provided at a required portion of the outer peripheral frame 51.
That is, the jig mounting surface is located along the left side 2L in the figure where the fuse housing part 12 is located on the periphery of the upper case upper wall 2a and the right side 2R in the figure where the connector housing part 13 is located in the vicinity. Since X1 and X2 are very narrow, the corresponding mounting table portions 52b and 52c of the assembling jig 50 are very narrow. On the other hand, the jig placement surface X3 around the identification display portion 10 along the front side 2F in the drawing has a maximum length and a wide width, and the corresponding placement base portion 52a of the assembly jig 50. Is long and wide. In the drawing, a portion along the rear side 2B has a wide jig placement surface X4 and a narrow jig placement surface X5, and the assembly jig 50 is provided with placement table portions 52d and 52e correspondingly. Yes.

In the present invention, since the identification display portion 11 that has conventionally been protruded from the upper wall of the upper case and cannot be used as the jig placement surface is used as the jig placement surface, the peripheral edge including the identification display portion 11 is included. Can be used as the jig placement surface X3.
As a result, when assembling the electrical junction box, the upper case 2 can be stably supported when the reference surface LS of the upper wall periphery of the upper case 2 is placed and supported on the mounting table 52 of the assembly jig 50. The assembly accuracy of the electrical junction box can be increased.

In the electrical junction box of this embodiment, since the lower case 3 is assembled last when the electrical junction box is assembled, the identification display unit 20 provided on the surface of the lower wall 3a of the lower case 3 is marked with the marking. Although the part 21 may protrude from the lower wall 3a, it is formed in the same manner as the upper case 2 side, and the reference surface of the lower case lower wall 3a and the surface of the marking part 21 are the same surface.
Thus, if the surface of the marking part 21 of the identification display part 20 provided in the lower case 3 is formed at the same height as the reference surface of the lower case lower wall 3a, the lower case 3 is placed on the mounting table for the assembly jig. Also when mounting on a part, the identification display part 20 can be utilized as a jig mounting surface.

  In addition, when the case is not composed of a lower case and an upper case, and a cover is attached to one case main body, an identification display portion provided on the case surface exposed to the outer surface of the case main body is configured similarly to the above embodiment. It is preferable that

The electrical junction box of embodiment of this invention is shown, (A) is a top view, (B) is a front view, (C) is a bottom view. It is the electric junction box II-II sectional view. It is drawing explaining assembling an electric junction box supported by an assembly jig. It is a top view of an upper case. It is a partially expanded sectional view of FIG. It is sectional drawing which shows the state which mounted the identification display part of the upper case in the jig | tool for an assembly. It is a top view of the jig | tool for an assembly used by this invention. (A) (B) is drawing which shows a prior art example. (A) (B) is drawing explaining the assembly procedure of the electrical junction box using the assembly jig.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electrical junction box 2 Upper case 2a Upper wall 3 Lower case 10 Engraved part 10s Surface of engraved part 11 Identification display part 12 Fuse accommodating part 13 Relay accommodating part 14 Connector accommodating part 15 Recessed part X Jig mounting surface X3 Identification display part Jig placement surface 50 Jig for assembly 51 Outer frame 52 Placement table

Claims (4)

The electrical component mounting part protrudes from the reference surface of the case surface, and an identification display part is provided along the peripheral edge of the case surface.
The identification display unit protrudes a stamped portion from the bottom surface of the recess that is recessed from the reference surface of the case surface, the protruding surface of the stamped portion is positioned at the same height as the reference surface of the case, and the identification display An electrical connection box characterized in that the part is a jig placement surface against which an assembly jig abuts. A fuse housing portion, a relay housing portion and a connector housing portion are provided on the surface of the case,
2. The electrical connection box according to claim 1, wherein the jig placement surface is a surface of the case where the fuse housing portion, the relay housing portion and / or the connector housing portion is not provided.   The electrical junction box according to claim 1, wherein the jig placement surface includes at least a part of a peripheral edge of the case surface. An assembly method for an electrical junction box according to any one of claims 1 to 3,
The case mounted and supported by the assembly jig is one of a lower case and an upper case,
In the case of the upper case, it is placed on the assembly jig with the identification display portion facing downward, and the insulating plate, bus bar, and printed board are placed upward from the upper surface opening of the upper case supported by the assembly jig. A method for assembling an electric junction box, which is inserted further, and then covers the lower case and is coupled to the upper case.

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