JP3140280B2 - Mounting structure of electrical junction box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric connection for attaching and detaching a junction box body on which various electric parts such as fuses are mounted to a body base of an automobile or the like.
The present invention relates to a mounting structure for a connection box .

[0002]

2. Description of the Related Art A mounting structure for attaching and detaching a junction box main body (hereinafter, referred to as a J / B main body) to a base of a vehicle body or the like is disclosed in, for example, Japanese Utility Model Laid-Open Publication No. 64-47716. Are known. This mounting structure is shown in FIGS. As shown in FIG.
Two abutment pins 52 are vertically provided on the upper surface of 1. An upper bracket 54 having a vertical hole 53 engaged with the butting pin 52 is provided with a base 55 (see FIG. 6).
Are provided so as to protrude from the mounting surface 56. In addition, the lower part of the above-mentioned vertical hole 53 smoothly spreads downward like a mortar.

On the other hand, a lower bracket 57 is provided integrally with a lower portion of the J / B main body 51, and a mounting hole 58 is provided in the lower bracket 57 in a horizontal direction. Further, fixing bolts 59 erected in the horizontal direction on an earth bracket 60 provided on the mounting surface 56.
Are fitted in the mounting holes 58. When the fixing bolt 59 is fitted into the mounting hole 58,
The lower bracket 57 is adapted to be fastened to the mounting surface 56 by a nut 61 screwed into a fixing bolt 59.

The operation of the above configuration will be described with reference to FIG. First, the abutment pin 52 provided on the upper surface of the J / B main body 51 is fitted into the vertical hole 53 of the upper bracket 54 by the entire length from below. At this time, in order to prevent the lower bracket 57 provided at the lower part of the J / B main body 51 from contacting the protruding fixing bolt 59, the J / B main body 5 is required.
Reference numeral 1 denotes a state where the lower side of the mounting surface 56 is inclined forward (to the left in FIG. 6).

Next, when the lower bracket 57 is pushed in the direction of the mounting surface 56, the J / B main body 51 swings rearward (rightward in FIG. 6) around the butting pin 52 and the vertical hole 53. The fixing bolt 59 is fitted into the mounting hole 58, and the tip protrudes from the mounting hole 58 on the side opposite to the mounting surface. Then, if the lower bracket 57 is tightened with the nut 61,
The J / B main body 51 is attached to the base 55.

[0006]

According to the above description of the operation, in order for the fixing bolt 59 to be fitted into the mounting hole 58, the J / B body 51 and the lower bracket 57 must be swung rearward. Must. Accordingly, the center of the mounting hole 58 on the mounting surface 56 side swings along an arc-shaped trajectory T centered on the vertical hole 53 as shown by a two-dot chain line in FIG. Since the vertical hole 53 is located at a distance D from the mounting surface 56, the trajectory T rises by the height h while swinging from the tip of the fixing bolt 59 to the root by the length e.
Accordingly, the points of each part of the mounting hole 58 are similarly swung along a circular locus, so that the inner diameter of the mounting hole 58 is fixed so that the mounting hole 58 does not interfere with the fixing bolt 59. It must be much larger than the diameter d.

However, if the inner diameter of the mounting hole 58 is increased in order to eliminate the interference between the mounting hole 58 and the fixing bolt 59, the play between the mounting hole 58 and the fixing bolt 59 increases.
Before tightening the nut 61, the J / B body 51 is dropped f
It goes down by the minute. Therefore, there is a problem that the butting pin 52 comes off from the vertical hole 53. The abutment pin 52 has a rib 52a which is deformed by fitting with the vertical hole 53 (FIG. 5).
See) is provided to prevent the backlash, but this rib 5
The action of 2a alone cannot prevent the J / B main body 51 from falling off. Butt pin 5 to prevent this
If the length 2 is made longer, it becomes difficult to fit into the vertical hole 53 at the time of the mounting operation, and the swinging operation described above becomes difficult, so that the mounting hole 58 cannot draw a circular locus. SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention that when mounting a J / B body to a base, the mounting hole does not interfere with a fixing bolt and the J / B body is largely dropped before tightening a nut. There is no electrical junction box mounting structure to provide.

[0008]

To achieve the above object of the Invention The present invention relates to an electro provided with various electric parts such as a fuse
Abutment boss provided at approximately the center in the thickness direction of the top surface of the connection box body
A look write fitted into longitudinal holes in the upper bracket which protrudes horizontally from the mounting base, the electrical junction box body is swung to the mounting base side, behind the back of the electrical junction box body
The lower bracket protruding vertically is attached to the mounting base.
Attach and mount on the lower bracket
A mounting structure for an electric connection box , wherein a drill hole is inserted horizontally into a fixing bolt that has been set upright from the mounting base and tightened with a nut.
A is, the the inner surface upper portion of the mounting hole, the tapered portion descends toward the bolt insertion direction is provided, and is positioned below the hole edge over the mounting hole bolt insertion side hole edge top of the bolt protruding side of An electrical junction box mounting structure characterized by the above. The mounting hole may be an inclined hole whose central axis is inclined downward from the mounting surface side of the mounting base.

[0009]

In the above construction, the thickness of the upper surface of the electric connection box main body is set.
A boss from the mounting base abutment provided on observed direction approximate center
After inserting it into the vertical hole of the upper bracket that protrudes horizontally , use this vertical hole as a fulcrum and from the back of the electrical junction box main body.
When projecting rearwardly to swing the lower bracket to the mounting base <br/> side provided vertically, in advance erected horizontally from the mounting base
The fixing bolt is fitted into the mounting hole. At this time, the shape of the mounting hole is such that a tapered portion is provided at the upper portion of the inner surface, the tapered portion being lowered in the bolt insertion direction, that is, the central axis is formed as an inclined hole inclined downward from the mounting surface side of the mounting base. The upper part of the hole on the bolt projecting side of the hole was positioned lower than the upper part of the hole edge on the bolt fitting side. Therefore, never mounting hole in the lower bracket for swinging from interfering with the fixing bolt, and because there is no inconvenience such as out of the boss vertical holes butting the electrical connection box falls amount of body also immaterial by fitting play Work efficiency is improved.

[0010] Finally, the lower bracket is tightened with the nut, thereby completing the mounting operation. As before, even if the diameter of the bolt insertion side of the mounting hole is increased to facilitate bolt insertion, the upper edge of the mounting hole on the bolt protruding side is located below the upper edge of the bolt insertion side. Fitting play can be reduced to prevent falling off.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. First, on a J / B main body 1 such as a junction box to which a relay, a terminal, and the like are mounted , a boss 2 is provided on an upper surface of the J / B main body so as to abut substantially at the center in the thickness direction of the J / B main body . With the back of the J / B body
The lower bracket 3 protruding backward from the surface and hanging vertically is J
/ B body 1 and provided integrally. The abutment boss 2 projects horizontally from a mounting surface 5 of a base 4 such as an automobile body.
The upper bracket 6 is provided so as to be engaged with a vertical hole 7. The lower end of the vertical hole 7 extends in a trumpet shape so that the J / B body 1 described later can swing.

The vertical mounting plate 3 of the lower bracket 3
a is provided with a mounting hole 8. The mounting hole 8 is formed as an inclined hole 8 a that is inclined downward from the mounting surface 5 to the opposite mounting surface 9. Further, the mounting hole 8
Inside, a fixing bolt 11 erected horizontally is fitted into an earth bracket 10 provided on the base 4, and a tip thereof is provided so as to protrude from the opposite mounting surface 9.
A nut 12 is screwed to the tip of the protruding fixing bolt 11.

With the above configuration, the first configuration will be described with reference to FIG.
The operation of the embodiment will be described. First, the abutment boss 2 provided on the upper surface of the J / B main body 1 is
Is fitted from below. At this time, in order to prevent the mounting plate 3a of the lower bracket 3 provided at the lower part of the J / B main body 1 from coming into contact with the protruding fixing bolt 11, J / B is used.
The B main body 1 is in a state where the lower side is inclined forward (to the left in FIG. 2) with respect to the mounting surface 5.

Next, when the J / B main body 1 is pushed in the direction of the mounting surface 5 of the base 4, the J / B main body 1 moves rearward (rightward in FIG. 2) around the butting boss 2 and the vertical hole 7. Rocked.
Here, since there is a distance D between the abutment boss 2 and the mounting surface 5, the center of the mounting hole 8 swings while drawing an arc-shaped locus T centered on the lower end of the vertical hole 7. I do. Therefore, each point of the mounting hole 8 also swings along a locus similar to the locus T.

The trajectory T corresponds to the fixing bolt 1 in the drawing.
1 rises by the height h during the protruding length e, the inclination angle downwardly facing the mounting surface 9 is desirably α = tan ⁻¹ h / e. T (d +
If h) inclined hole 8a of the larger diameter d ₁ is only to be opened in the mounting plate 3a, the attachment holes 8 can be fitted into the fixing bolt 11 without interfering with the fixing bolt 11.
When the nut 12 is tightened to the fixing bolt 11 protruding forward from the opposite mounting surface 9 of the mounting plate 3a, J / B
The main body 1 is fixed to the base 4 and the mounting operation is completed.

Further, since there is little play on the fixing bolt 11 at the intersection P between the upper surface of the inclined hole 8a as the mounting hole 8 and the opposite mounting surface 9 of the mounting plate 3a, J / B before the nut 12 is tightened. The falling amount f of the main body 1 is small as shown in FIG. 1, and the inclined hole 8a is opposite to the mounting surface 9 side.
Because the tip of abuts against the thread of the fixing bolt 11 ,
There is no inconvenience that the butting boss 2 falls off the vertical hole 7. Next, a second embodiment will be described with reference to FIG. The difference between the second embodiment and the first embodiment is that
The only difference is that the inclined hole 8a as the mounting hole 8 is changed to a mortar-shaped tapered hole 8b narrowed toward the direction opposite to the mounting surface 9 of the mounting plate 3a. This tapered hole 8b has a taper angle β =
If 2α and the large-diameter portion d ₂ of the tapered hole on the mounting surface 5 side of the mounting plate 3a is larger than (d + 2h), the tapered hole 8b will not interfere with the fixing bolt during the mounting operation.

The other operation is the same as that of the first embodiment, and the description is omitted. Also, J before tightening the nut 12
Since the fall amount f due to backlash of the / B body 1 is also small for the same reason as in the first embodiment, there is no inconvenience that the abutment boss 2 comes off from the vertical hole 7. Of the mounting holes 8,
The inclined hole 8a and the tapered hole 8b have a shape that can be easily cut when the material of the lower bracket 3 is metal. However, basically, the upper surface of the mounting hole 8 is fixed to the fixing bolt 11 by the movement of the locus T. So that it does not interfere with
The same effect as in the first and second embodiments can be obtained also with the single tapered hole 8c having the tapered portion 13 only on the upper surface as shown in FIG. The one-side tapered hole 8c is provided in the lower bracket 3
If the material is a synthetic resin, the shape is easy to mold. Further, the tapered hole 8b has a shape that is easy to form as well as easy to cut.

As described above, according to the present embodiment, since the tapered portion 13 is provided at least on the upper surface of the mounting hole 8, the mounting hole 8 is attached to the fixing bolt 11 by the swinging operation during the mounting operation. Since there is no interference, the mounting operation is easy and there is an effect that the working efficiency is improved. Also, the play between the mounting hole 8 and the fixing bolt 11 on the side opposite to the mounting surface 9 of the mounting plate 3a is slightly suppressed .
The tip on the side opposite to the mounting surface 9 contacts the thread of the fixing bolt 11.
Since the contact is made, there is no inconvenience that the abutment boss 2 comes off from the vertical hole 7, so that there is an effect that the reliability is improved.

Further, depending on the material of the lower bracket 3, the inclined hole 8a and the tapered hole 8b are easily formed by machining the mounting hole 8 by cutting, and the tapered hole 8b and the single tapered hole 8c are formed by casting. Since the shape of the mounting hole 8 can be selected depending on the processing method such that the processing is easy, it is expected that the working efficiency is improved and the cost reduction is economical. It should be noted that the present invention is not limited to the above-described embodiments, and can be implemented in other modes by making appropriate changes.

[0020]

As described above, according to the present invention, at least an upper portion of the inner surface of the mounting hole is provided with a tapered portion which is lowered in the bolt insertion direction, and the upper portion of the hole edge on the bolt projecting side of the mounting hole is inserted with the bolt. It is located below the upper part of the hole edge on the side, so the electrical connection is required to fit the fixing bolt into the mounting hole.
When connection box body is rocked around the boss butt, mounting hole does not interfere in the fixing bolt. Therefore, there is an effect that work efficiency is improved. Also, since the upper edge of the mounting hole on the bolt protruding side is located below the upper edge of the bolt fitting side, the inconvenience that the electric connection box body drops significantly before the nut is tightened and the butting boss comes off the vertical hole. Does not happen. Therefore, there is an effect that reliability is improved.

[Brief description of the drawings]

FIG. 1 is a right side view, partially in section, showing a first embodiment of the present invention.

FIG. 2 is an operation explanatory diagram in FIG. 1;

FIG. 3 is an enlarged explanatory view around a mounting hole showing a second embodiment of the present invention.

FIG. 4 is an enlarged explanatory view showing a basic shape of a mounting hole of the present invention.

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

FIG. 6 is an operation explanatory diagram in FIG. 5;

[Explanation of symbols]

1,51 junction box body (electric junction box
Main body) 2 Butt boss 3,57 Lower bracket 3a Mounting plate 4,55 Base 5,56 Mounting surface 6,54 Upper bracket 7,53 Vertical hole 8,58 Mounting hole 8a Inclined hole 8b Tapered hole 8c Single tapered hole 9 protruding length of the distance e fixing bolts from the anti-attachment surface 11,59 securing bolt 12 or 61 nut 13 tapered portion 52 abutting the pin d fixing bolt diameter d ₁ inclined hole diameter d ₂ taper hole large-diameter portion D abutment boss to the mounting surface Depth h Fall height T Trajectory

Claims (2)

(57) [Claims] 1. A electric provided with various electric parts such as a fuse
Abutment boss provided at approximately the center in the thickness direction of the top surface of the connection box body
A look write fitted into longitudinal holes in the upper bracket which protrudes horizontally from the mounting base, the electrical junction box body is swung to the mounting base side, behind the back of the electrical junction box body
The lower bracket protruding vertically is attached to the mounting base.
Attach and mount on the lower bracket
A mounting structure for an electric connection box , wherein a drill hole is inserted horizontally into a fixing bolt that has been set upright from the mounting base and tightened with a nut.
A is, the the inner surface upper portion of the mounting hole, the tapered portion descends toward the bolt insertion direction is provided, and is positioned below the hole edge over the mounting hole bolt insertion side hole edge top of the bolt protruding side of An electrical junction box mounting structure, characterized in that: 2. The mounting structure for an electric connection box according to claim 1, wherein said mounting hole is an inclined hole whose central axis is inclined downward from a mounting surface side of said mounting base.