JP3134807B2 - 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 junction box for a motor vehicle, and more particularly, to a variety of electric wire bundles which are guided out of a lower part of one side of a lower cover by a gutter-shaped electric wire guide in a required external direction. An object of the present invention is to allow an outer diameter wire bundle to be securely fixed to a gutter-shaped wire guide.

[0002]

2. Description of the Related Art In an electric junction box for a car made of a synthetic resin of this type, a lower portion of a case 1 accommodating electric components is provided at a lower portion thereof.
As shown in FIG. 8, a box-shaped lower cover 2 is fitted through a fitting step 3, and is engaged and integrated by locking means 4 comprising locking claws and locking frames provided at a plurality of locations on the peripheral walls of both. ing. A lower part of one side of the lower cover 2 has a U-shaped gutter-like cross-section for leading the other end of the wire bundle W having one end connected to an electric component in the case to the outside and guiding it in a required direction. Wire guide 5 is integrally protruded, and the wire bundle W is pushed into the path of the wire guide 5 and, for example, an adhesive tape is wrapped around the outer periphery of the wire guide 5, or the upper opening of the wire guide 5 is opened with an appropriate lid. By closing, the wire bundle W is waterproofed and protected. Normally, a cut-out portion 5a in which the cut-out bottom surface 6 is slightly lower than the upper portion of the wire bundle W is provided on both side walls at the end of the gutter-shaped wire guide 5, and as shown in FIG. The wire bundle W is fastened to the inner peripheral surface of the wire guide 5 by fastening the wire bundle W with an adhesive tape T.

[0003]

As described above, in the conventional electric junction box, notches 5a are provided on both side walls at the tip of the gutter-like wire guide 5, and the wire bundle W is cut by the notches 5a. The wire bundle W was fixed to the wire guide 5 by winding a portion of which the upper portion protrudes from the notched bottom surface 6 together with the wire guide 5 with an adhesive tape T. The reason why a part of the wire bundle W is fixed to the wire guide 5 is that if the wire bundle W is pulled in a required direction, the wire bundle W may be displaced and the wire length may not be managed. is there. In addition, one end of the wire bundle W is connected to an electric component in the case of the electric connection box by a connector or the like, and if the wire bundle W is pulled in a required direction, one end of the wire bundle W may come off from the electric component. Because there is.

Normally, the thickness (outer diameter) of an electric wire bundle (wire harness W / H) W used for an electric junction box differs depending on the grade of a vehicle or the like. For this reason, in the above-mentioned conventional electric connection box, the lower cover 2 in which the notch depth of the notch portion 5a of the electric wire guide 5 differs for each vehicle type must be manufactured.
Since the electric connection box cannot be shared between different types of vehicles, the cost of the electric connection box has been high.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and enables the wire bundle to be securely fixed to the wire guide even if the diameter of the wire bundle led out from the side wall of the lower cover of the electric connection box is changed. That is the task.

[0006]

In order to solve the above-mentioned problems, according to the present invention, a case for accommodating an electric component and a lower cover fitted to a lower portion of the case are provided, and one side of the lower cover is provided. The electric connection box is provided with a gutter-shaped electric wire guide protruding and guiding the other end of the electric wire bundle connected to the electric component in the case in an external required direction. An electric connection box, wherein a plurality of notches having different notch depths from the upper end of the side wall are provided at positions, and the wire bundle and the guide are fastened by tape winding at the notches corresponding to the outer diameter of the wire bundle. Is provided.

In the electric junction box having such a configuration, the electric wire bundle and the guide are made to have a contact (close contact) area with the inner surface of the electric wire bundle as large as possible at the cutout portion corresponding to the outer diameter of the electric wire bundle. It can be fastened and the wire bundle can be firmly fixed to the guide.

The gutter-shaped electric wire guide is formed of, for example, a gutter-shaped member having a U-shaped or U-shaped cross section, and provided with notches having different notch depths at a plurality of different required positions in the longitudinal direction. I have. Further, the plurality of notches may be formed intermittently or continuously.

[0009] In the case of continuous formation, specifically, a plurality of notches having different notch depths are continuously formed on both side walls of the gutter-shaped electric wire guide from a larger notch depth to a smaller notch depth. The two side walls are formed in one piece, and the two side walls are formed in substantially the same multi-stage shape in which the height of the upper end face at the opposing position is made substantially the same.

A plurality of notches having different notch depths are formed integrally on one side wall of the gutter-shaped electric wire guide from one having a larger notch depth to one having a smaller notch depth, while the other side wall is formed. The wall of the portion facing the plurality of continuous notches of the one side wall is completely removed, and the plurality of notches having different notch depths in the bottom plate from the side from which the wall is removed are notched. An L-shaped cross-sectional shape portion whose inner peripheral length changes in multiple stages is formed in the gutter-shaped electric wire guide by continuously and integrally forming the gutter-shaped electric wire guide from a larger depth to a smaller depth. In this case, the tape can be brought into contact with not only the upper surface but also the side surface of the wire bundle, and the wire bundle and the guide can be more firmly fastened.

In addition, a bottom plate of a predetermined length portion of the gutter-shaped electric wire guide is removed, and a plurality of notch portions having different notch depths at upper end sides and lower end sides of both side walls of the predetermined length portion are formed. The two side walls have substantially the same multi-stage shape in which the heights of the upper end face and the lower end face of the opposing positions are substantially the same, respectively. Item 4). In this case, the tape can be brought into contact with not only the upper surface but also the lower surface of the wire bundle, and the wire bundle and the guide can be more firmly fastened.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an electric connection box 1 according to the first embodiment.
0, and in the figure, the same reference numerals as those in FIG. 8 showing the conventional electric junction box indicate the same or corresponding parts. The difference from the conventional electrical junction box is that both side walls 5 of the gutter-shaped wire guide 5 having a U-shaped cross section projecting from the lower portion of one side of the lower cover 2 are provided.
a, step-shaped notch 11 identical to each other at the tips of a, 5b
Is formed. That is, both side walls 5a, 5b
Notch 6 with a large notch depth from its tip
a, a notch portion 6b having a medium notch depth and a notch portion 6c having a small notch depth are continuously and integrally formed.

When the bundle of electric wires led out from the outlet 2a at the lower part of one side of the lower cover 2 is a thin bundle of electric wires W1, FIG.
As shown in (A), the upper portion of the wire bundle W1 protrudes above the notch bottom surface 7a at a notch portion 6a having a large notch depth, and the wire bundle W1 and the guide 5 are adhered by an adhesive tape. Fastened by winding T.

On the other hand, when the wire bundle led out from the outlet 2a at the lower part of one side of the lower cover 2 is a wire bundle W2 having a large diameter, the wire bundle W2 has a notch depth as shown in FIG. Small notch 6c, medium notch 6b, notch 6a with large depth
In any of the above, a part protrudes upward from the cutout bottom surfaces 7c, 7b, 7a, but in this case, the electric wire bundle W
The wire bundle W2 and the guide 5 are fastened with the adhesive tape T at the notch 6c having a small notch depth at which the contact area between the wire 2 and the inner surface of the guide 5 becomes the largest. In order to reinforce the fixation of the wire bundle W2 to the guide, the wire bundle W2 and the guide 5 are formed by another notch portion 6b having a medium notch depth and a notch portion 6a having a large notch depth. May be fastened with an adhesive tape.

Similarly, when the wire bundle led out from the outlet 2a at the lower part of one side surface of the lower cover 2 is a wire bundle of an intermediate diameter, the wire bundle is formed by a notch portion 6a having a large notch depth and a notch depth. Although the upper part of the notch 6b is medium, the upper part protrudes above the notch bottom faces 7a and 7b.
In this case, the wire bundle and the guide 5 are wrapped with the adhesive tape T at least in the notch portion 6b having a medium notch depth.

In the above description, the adhesive tape T is wrapped only around the notch, but the tape may be wrapped around the entire guide to improve the waterproof performance.

Although the gutter-shaped electric wire guide having a U-shaped cross section has been described here, as shown in FIG.
The stepped notch 1 similar to the gutter-shaped electric wire guide 55
Even if 1 is provided, the same effect can be obtained.

FIG. 4 shows a second embodiment, in which a gutter-shaped electric wire guide having a U-shaped cross section is shown. The electric connection box of the present embodiment is the same as FIG. 1 except for the gutter-shaped electric wire guide having a U-shaped cross section shown in FIG. 4, and the description of the other parts is omitted. The trough-shaped electric wire guide having a U-shaped cross section has a stepped notch 11 on one side wall 5a at the tip end and a stepped notch 11 on the side wall 5a of the other side wall 5b. The notch 6a having a notch depth greater than the stepped notch 11 in the bottom plate 8 from the side from which the wall is removed, and the notch 6a, An L-shaped cross-sectional portion having a stepped notch portion 12 in which a notch portion 6b having a medium depth and a notch portion 6c having a small notch depth are formed continuously and an inner peripheral length changes in multiple steps. It is 13.

In the present embodiment, as shown in FIG. 5A, in the case of a small-diameter wire bundle W1, the upper portion of the wire bundle W1 has a notch 6a having a large notch depth, that is, an L-shaped cross section. Part of the wire bundle W1 protrudes from both ends of the L-shaped guide portion 13a at the distal end where the inner peripheral length of the shape portion 13 is the smallest, and the wire bundle W1 is wrapped around with the adhesive tape T here.

On the other hand, when the wire bundle is a wire bundle W2 having a large diameter, as shown in FIG. 5B, the wire bundle W2 is an L-shaped guide portion 13a having a short inner peripheral length of the L-shaped cross-sectional shape portion 13. In each of the L-shaped guide portion 13b having an intermediate inner length and the L-shaped guide portion 13c having a longer inner circumference, a part of the wire bundle W2 protrudes from both ends. In this case, at least the wire bundle W
The wire bundle W2 is wound with an adhesive tape T around the L-shaped guide portion 13c having a long inner peripheral length where the contact area between the wire 2 and the inner surface of the guide 5 is the largest. For reinforcement, the wire bundle W2 may be wound with an adhesive tape T around another L-shaped guide portion 13a having a short inner peripheral length and an L-shaped guide portion 13b having an intermediate inner peripheral length.

Similarly, when the wire bundle is an intermediate diameter wire bundle, both ends of the L-shaped guide portion 13a having the smallest inner peripheral length and the L-shaped guide portions 13b having the inner peripheral length being the intermediate length are used. Although a part of the wire bundle W projects further, in this case, the wire bundle is wound around the L-shaped guide portion 13b having the intermediate inner length with the adhesive tape T.

FIG. 6 shows a third embodiment, which shows a gutter-shaped electric wire guide having a U-shaped cross section. The electric connection box of the present embodiment is the same as FIG. 1 except for the gutter-shaped electric wire guide having a U-shaped cross section shown in FIG. 6, and the description of the other parts is omitted. The trough-shaped electric wire guide having a U-shaped cross section has its tip removed from the bottom plate, and both side walls 5a,
Stepped notches 11 are formed on both the upper end and lower end of 5b, so that both side walls 5a and 5b have substantially the same width at both opposing positions and the same height at the upper end and lower end. It has a multi-stage wall shape at the height.

In the present embodiment, for example, when the wire bundle is a small-diameter wire bundle W1, as shown in FIG.
b so that a part of the wire bundle W1 protrudes from the upper end surface and the lower end surface of the minimum width wall portions 15a and 15b.
The wire bundle W1 is sandwiched between 5a and 15b, and the wire bundle W1 is wrapped with the adhesive tape T together with the minimum width walls 15a and 15b.

Then, as the diameter of the wire bundle increases, the intermediate width wall portions 16a, 16b of the side walls 5a, 5b
The wire bundle is sandwiched between the wall portions 17a and 17b having the maximum width and wound around with an adhesive tape. By doing so, the wire bundle and the guide can be fastened with the contact area between the wire bundle and the inner surface of the guide as large as possible according to the diameter of the wire bundle, and the wire bundle is firmly fixed to the guide. can do.

In the embodiment described above, a plurality of notches are formed continuously from one having a large notch depth to one having a small notch depth to form a step-like notch. It is needless to say that the same effect can be obtained even when the notches having different notch depths are formed intermittently.

In the embodiment described above, the number of the notch portions having different notch depths is three.
Or four or more.

[0027]

As is clear from the above description, the electric junction box of the present invention can always firmly fix the wire bundle to the wire guide of the lower cover for the wire bundles having different outer diameters. Therefore, the electric connection box (lower cover) can be shared between different grades of vehicles, and the cost of the electric connection box can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electric junction box according to a first embodiment.

FIGS. 2A and 2B are perspective views showing a state in which an electric wire bundle is wound around an end of an electric wire guide of the electric connection box of FIG. 1 with an adhesive tape;

FIG. 3 is a perspective view showing a modification of the electric junction box of the first embodiment.

FIG. 4 is a perspective view illustrating an end portion of an electric wire guide of an electric connection box according to a second embodiment.

5 (A) and 5 (B) are perspective views showing a state in which a wire bundle is wound around an end portion of the wire guide in FIG. 4 with an adhesive tape.

FIG. 6 is a perspective view illustrating an end portion of an electric wire guide of an electric connection box according to a third embodiment.

FIG. 7 is a side view showing a state in which a bundle of electric wires is wound around the distal end portion of the electric wire guide in FIG. 6 with an adhesive tape.

FIG. 8 is a perspective view of a conventional electric junction box.

9 is a front view showing a state in which a bundle of electric wires is wound around the distal end portion of the electric wire guide shown in FIG. 8 with an adhesive tape.

[Explanation of symbols]

 W, W1, W2 Electric wire bundle 1 Case 2 Lower cover 5 Electric wire guide 5a, 5b Side wall 6a-6c Notch 7a-7c Notch bottom 11 Stepped notch T Adhesive tape

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-8-140235 (JP, A) JP-A-8-140241 (JP, A) JP-A 8-280118 (JP, A) JP-A 7-140 95714 (JP, A) JP-A-7-67229 (JP, A) JP-A-3-106818 (JP, U) JP-A-4-93423 (JP, U) JP-A 62-119109 (JP, U) Hikaru Hei 2-139417 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02G 3/08 B60R 16/02 H05K 7/00

Claims (4)

(57) [Claims] 1. A case for accommodating an electric component, and a lower cover fitted to a lower portion of the case, the other end of the wire bundle connected to the electric component in the case being provided on one side of the lower cover in a required external direction. In an electric connection box in which a gutter-shaped wire guide protruding and guided is provided, a plurality of notch portions having different notch depths from the upper end of the side wall are provided at different positions in the length direction of the gutter-shaped wire guide, An electric connection box, wherein a wire bundle and a guide are fastened by tape winding at a notch corresponding to an outer diameter of the wire bundle. 2. A plurality of notch portions having different notch depths are continuously and integrally formed on both side walls of the gutter-shaped electric wire guide from a larger notch depth to a smaller notch depth. 2. The electrical junction box according to claim 1, wherein the upper end face at the opposing position has substantially the same multi-stage shape with substantially the same height. 3. A plurality of cutout portions having different cutout depths are formed integrally on one side wall of the gutter-shaped electric wire guide from one having a larger cutout depth to one having a smaller cutout depth. Completely removing the wall of the portion of the side wall facing the plurality of continuous notches of the one side wall, and cutting the plurality of notches having different notch depths in the bottom plate from the side from which the wall has been removed. 2. The L-shaped cross-sectional shape part in which the inner peripheral length changes in multiple steps is formed in the gutter-shaped electric wire guide by continuously and integrally forming the notch depth from a large one to a small one. Electrical junction box. 4. A bottom plate of a predetermined length of the gutter-shaped electric wire guide is removed, and a plurality of notches having different cut depths are formed at upper and lower ends of both side walls of the predetermined length. The two side walls are formed into a multi-stage wall shape in which the widths of both opposing positions are substantially the same and the heights of the upper end surface and the lower end surface are substantially the same. The electrical junction box according to claim 1, wherein