JP2003092816A - Electrical connection box mounting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrical connection box mounting structure which can surely perform the positioning of the electrical connection box. SOLUTION: At the time of fixing a relay box body 10 to a panel 25 through the screwing, a positioning means between the mounting holes 19, 23 is formed with an engaging structure of the projected area and recessed area, and the projected area (positioning projection) 24 is provided to a nut 21 mounted to the side of panel 25. Since the positioning projection 24 is mounted to the side of panel 25 as described above, the positioning projection 24 is never deformed in the course of process to carry in the relay box body 10 into the assembling field. Accordingly, reliable positioning can be performed at the time of mounting the relay box body 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for an electric junction box.

[0002]

2. Description of the Related Art A structure for mounting an electric connection box such as a junction box (JB) or a relay box (RB) on a vehicle is shown in FIG. This is different from the screw hole 2 of the nut 6 mounted on the panel 1 side of the vehicle and the mounting hole 4 provided on the electric junction box 3 side.
After aligning, the bolt 5 is inserted, and the nut 6 is screwed and fixed. A positioning hole 7 is provided on the panel 1 side for positioning the screw hole 2 of the nut 6 and the mounting hole 4 on the electric junction box 3 side.
The protrusion 8 that fits in this was provided on the side of the electrical junction box 3.

[0003]

Therefore, the electric junction box 3
When the electric connection box 3 is carried into the assembly site for the panel 1, the electric connection box 3 is transported in a bag or the like. Therefore, during the conveyance, the electric connection boxes 3 may be entangled with each other and the protrusion 8 may be deformed. . The present invention was completed in view of the above circumstances, and an object of the present invention is to provide a mounting structure for an electric connection box that can reliably position the electric connection box with respect to a panel.

[0004]

As a means for achieving the above object, the invention of claim 1 is the first mounting hole formed in the mounting portion of the electric junction box and the first mounting hole formed in the panel side. (2) An electrical connection box mounting structure in which an electrical connection box is mounted on the panel by inserting and tightening screw means into both mounting holes of the two mounting holes, and the mounting portion and the panel are opposed to each other. The surface is provided with positioning means capable of positioning the electric junction box by fitting the unevenness, and the convex portion of the positioning means is arranged on the panel side.

The invention of claim 2 is characterized in that, in the invention of claim 1, one of the facing surfaces of the positioning means is provided with a tapered portion for guiding.

A third aspect of the present invention is characterized in that, in the first or second aspect, the convex portion forming the positioning means is provided around the second mounting hole. Have.

According to a fourth aspect of the present invention, in any one of the first to third aspects, a nut having the second mounting hole is attached to a lower surface of the panel on the panel side, and The upper surface of the nut is provided with the convex portion projecting to the panel surface, while the electric connection box side is formed with the first mounting hole, and the concave portion around which the convex portion is fitted. Is provided, and the electric connection box positioned by the convex portion and the concave portion is characterized in that it is attached to the panel by the screw means screwed from the electric connection box side.

[0008]

<Advantages and effects of the invention><Invention of claim 1> According to the invention of claim 1, since the convex portion is provided on the panel side, the electric junction box side is a concave portion. Therefore, the convex portion is not deformed when the electric connection box is carried in.

<Invention of Claim 2> According to the invention of Claim 2, since the guiding taper portion is provided on at least one of the facing surfaces of the positioning means constituted by the projection and the depression, the projection is formed. When the concave portion is fitted to the portion, the convex portion and the concave portion are in contact with each other by the tapered portion and guided along the gradient, so that the convex portion and the concave portion can be fitted easily and the positioning work is excellent.

<Invention of Claim 3> According to the invention of Claim 3, since the convex portion constituting the positioning means is mounted around the second mounting hole, it is set at a position separated from the second mounting hole. It is possible to easily secure the positioning accuracy of the first and second mounting holes, as compared with the case.

<Invention of Claim 4> According to the invention of Claim 4, the convex portion mounted on the upper surface of the nut projects to the surface of the panel, and the concave portion on the side of the electrical junction box is fitted into this convex portion. If they are combined, the electric connection box is positioned and the first mounting hole on the electric connection box side and the second mounting hole of the nut are aligned, so that the mounting work can be easily performed. Since this mounting work can be performed by tightening the screws from the front surface side of the panel, workability is excellent as compared with the case of performing from the back surface side of the panel.

[0012]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a relay box body (electrical junction box) 10 applied to this embodiment. The relay box body 10 is made of resin, and is formed by a frame-shaped casing portion 11 that opens upward and downward, and a pair of mounting portions 15A and 15B. Both upper and lower covers (not shown) are attached to the casing 11, and circuit elements such as a fuse Fu and a relay R that form an electric circuit are attached to the inside of the casing 11. The harness (not shown) is attached to the casing 1
It is designed to be pulled out from the lower part of 1. That is, a semicircular insertion recess 13A is provided at the lower edge of the side surface 13 of the casing portion 11, and when the lower cover is mounted, the side surface on the lower cover side also has a semicircular insertion recess (A) corresponding thereto. (Not shown) are provided upside down, so that the insertion recesses of both sides are aligned to form a round harness insertion hole, and the harness (not shown) is formed.
Is drawn out to the outside through the harness insertion hole.

The relay box body 10 is mounted on, for example, the panel 25 in the engine room of the vehicle,
The assembly structure will be described below. First, the mounting portions 15A and 15B in the relay box body 10 are
The side surfaces 12A and 12B of the casing have flat plate extending portions 16 extending downward. Then, on both side edges thereof, a pair of side edge portions 17 which are widened toward the lower end are formed.
Is formed upright and has a rectangular mounting piece 1 at its lower edge.
8 is installed. A first mounting hole 19 for mounting the relay box main body 10 to the panel 25 penetrates through the central portion of the mounting piece 18. The first mounting hole 19 is formed by connecting a circular hole 19A provided at the center and positioning recesses 19B radially from each other at 90 ° intervals (see FIG. 3).

On the other hand, the panel 2 has a nut 2 described below.
An escape hole 26 for 1 is provided. The escape hole 26 has a shape that can be aligned with the first mounting hole 19. Further, a metal nut 21 is arranged on the lower surface side (lower side in FIG. 1) of the panel 25 at a position corresponding to the escape hole 26. The nut 21 has a rectangular base plate 22 that is welded to the lower surface of the panel 25, and a second mounting hole (screw hole) 23 that is aligned with the circular hole 19A penetrates through the center of the base plate 22.

On the upper surface of the substrate 22, four positioning protrusions 24 having a rectangular cross section are formed around the second mounting hole 23. These positioning projections 24 project to the upper surface of the panel 25 through the escape holes 26, and further,
The first mounting hole 19 and the positioning recessed portion 19B are aligned with each other so that they are fitted with each other with almost no space. Thus, the positioning recesses 19B on the relay box body 10 side are fitted into the positioning protrusions 24 on the panel 25 side, whereby the relay box body 10 is positioned in four directions in the plane. Further, the guiding recessed taper portion 2 is provided on the side of the contact surface of the positioning recess 19B with which the panel 25 is abutted.
0 is provided (see FIG. 4).

In this embodiment, one mounting portion 15 is used.
The B side (the back side in FIG. 1) is the other mounting portion 15A side (the FIG. 1 side).
It is fixed to the panel 25 with the bolts 30 similarly to the front side), but is not provided with positioning means. This is because, as described above, since the positioning protrusions 24 are used to regulate the position in the present embodiment, if the positioning means is provided in either one, the entire relay box body 10 is positioned.

If the positioning projection 24 is shaped so as to fit into the positioning recess 19B on the panel side while being prevented from rotating, it is necessary to provide four positioning projections 24 as in the present embodiment. Instead, it may be in one place. However, as in the present embodiment, the positioning protrusion 24
When the relay box body 10 is provided at four places, it is possible to reliably withstand the tightening torque when mounting the relay box body 10.

The configuration of the present embodiment is as described above. Next, the procedure for assembling the relay box body 10 to the vehicle and the function and effect will be specifically described. Relay box body 10
For assembling the vehicle to the vehicle, both upper and lower covers are attached to the relay box body 10 in advance. And
In the automobile production line, the mounting piece 1 of the relay box body 10 is attached to the upper surface of the panel 25 in the engine room.
8 are opposed to each other. In this case, the other mounting portion 1
On the 5A side, the positioning recesses 19B of the relay box body 10 are assigned to the positioning protrusions 24 protruding from the upper surface of the panel 25.

As a result, each positioning recess 19B is guided along the slope of the taper portion 20 to the center of the positioning projection 24 and fits into the positioning projection 24, and the relay box body 10 is positionally regulated at the proper mounting position. . That is, in this regular position, the first and second mounting holes 19, 2
3 is in alignment. Also, the relay box body 1
Since the positioning of 0 is performed by the four positioning protrusions 24, the relay box body 10 is positioned in the plane direction. Therefore, even on the side of the mounting portion 15B that does not have positioning means, the first and second mounting holes 19 and 23 are provided.
Are automatically matched. Then, when the bolt 30 is tightened subsequently, the assembling work of the relay box body 10 is completed.

As described above, according to this embodiment, since the positioning protrusion 24 is provided on the panel 25 side, the relay box body 10 side is a recess (positioning recess 19B). Therefore, the positioning protrusion 24, which is a concern when the relay box body 10 is carried in, is not deformed. In addition, since the positioning protrusion 24 is provided on the metal nut 21, the positioning protrusion 24 will not be damaged during the positioning operation or the bolt 30 tightening operation.

Further, since the guiding taper portion 20 is provided in the positioning recess 19B on the relay box body 10 side, when the positioning recess 19B on the relay box body 10 side is fitted to the positioning protrusion 24 on the panel 25 side. The positioning recess 19B abuts the positioning projection 24 at the tapered portion 20 and follows the slope of the positioning projection 2
Since it is guided to the center of 4, it can be easily fitted and has excellent positioning workability. Since the positioning protrusion 24 is mounted around the second mounting hole (screw hole) 23, compared with the case where the positioning protrusion 24 is set at a position separated from the second mounting hole 23, the first and second mounting holes 19 are provided. , 23 positioning accuracy can be easily ensured.

Further, since the work of mounting the relay box body 10 is performed by the bolts 30 screwed in from the relay box body 10 side, the panel 25 surface side (see FIG. 1).
It can be performed from the middle upper side, and the back side of the panel 25 (see
It excels in workability as compared with the case of performing the mounting work from the middle and lower side.

<Other Embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition to the above, various modifications can be made without departing from the scope of the invention.

(1) In this embodiment, the nut 21 is provided with the positioning projection 24. However, the positioning projection 24 may be provided on the panel 25 side, and for example, the positioning projection 24 may be directly provided on the panel 25 itself. .

(2) In the present embodiment, the nut 21 is attached to the panel 25 side to perform the tightening work from the relay box body 10 side. However, in some cases (peripheral parts interfere with the tightening work from the relay box body 10 side). In such a case, the nut 21 is integrally formed on the relay box body 10 side, that is, the relay box body 10 is formed integrally, or a screw portion is directly provided in the first mounting hole 19,
Tightening may be performed from the panel 25 side.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a mounting structure of a relay box body according to an embodiment of the present invention.

FIG. 2 is a perspective view of a nut

FIG. 3 is a cutaway perspective view showing a mounting portion of a relay box body.

FIG. 4 is a sectional view showing the mounting structure of the relay box body.

FIG. 5 is a perspective view showing a conventional example.

[Explanation of symbols]

10 ... Relay box body (electrical junction box) 15A, 15B ... Mounting part 19 ... First mounting hole 19B ... Positioning recess (recess) 20 ... Tapered part 21 ... Nut 23 ... Second mounting hole (screw hole) 24 ... Positioning projection (projection) 25 ... Panel 26 ... Escape hole 30 ... Bolt (screw means)

Front page continuation (51) Int.Cl. ⁷ identification code FI theme code (reference) H05K 7/12 H05K 7/12 JN F term (reference) 4E353 AA18 AA19 BB02 BB13 CC12 CC26 CC32 DD02 DR03 DR17 DR22 DR34 DR44 DR57 GG09 GG21 4E360 AB13 AB20 AC03 EA03 EA21 EB01 EC16 ED03 ED17 ED27 EE02 FA09 GA06 GA53 GB93 GB94 5G361 AA06 AB01 AC01 AD01 AE01

Claims (4)

[Claims] 1. The panel is obtained by inserting and tightening screw means into both mounting holes of a first mounting hole formed in a mounting portion of an electric junction box and a second mounting hole formed on a panel side. An electrical connection box mounting structure for mounting an electrical connection box on a surface, wherein positioning means for positioning the electrical connection box by fitting recesses and projections is provided on a surface facing the mounting portion and the panel. At the same time, the convex portion of the positioning means is arranged on the panel side. 2. The mounting structure for an electrical junction box according to claim 1, wherein one of the facing surfaces of the positioning means is provided with a tapered portion for guiding. 3. The mounting structure for an electrical junction box according to claim 1, wherein the convex portion forming the positioning means is provided around the second mounting hole. 4. On the panel side, a nut having the second mounting hole is attached to the lower surface of the panel, and the convex portion protruding to the panel surface is provided on the upper surface of the nut, The first attachment hole is formed on the side of the electric junction box, and a concave portion that fits the convex portion is provided around the first attachment hole, and the electric junction box positioned by the convex portion and the concave portion is The electrical connection box mounting structure according to any one of claims 1 to 3, wherein the electrical connection box is mounted on the panel by the screw means screwed in from the electrical connection box side.