JP4631791B2 - Electrical junction box for automobile - Google Patents

Description

  The present invention relates to an electric junction box for automobiles, and more specifically, when the wire harness routed from above is lowered and then pulled into the electrical junction box in an upward posture, space saving and workability are improved. Is.

2. Description of the Related Art Conventionally, as an electric connection box mounted on an automobile, Japanese Patent Application Laid-Open No. 2004-215418 (Patent Document 1) provides an electric connection box including a relay box shown in FIG. In the relay box 1, an electrical component 5 such as a relay is fitted on the upper surface of the main body case 2, and the upper cover 3 is covered on the upper surface of the main body case 2 in order to prevent the electrical component 5 from getting wet. Yes. Therefore, the wire harness connected to the electrical component 5 is drawn from the lower surface side of the main body case 2, is directed upward in the case main body 2, and is connected to the lower portion of the electrical component 5.
A wire lead-in port 6 is provided on the side surface of the lower cover 4 that covers the lower surface side of the main body case 2, and the wire harness is drawn into the box from the wire lead-in port 6. The wire lead-in port 6 also has a function as a drain port when the relay box 1 is submerged.

When a wire harness is drawn into such an electrical junction box, conventionally, a wire harness cover 7 as shown in FIGS. 6A and 6B is often attached to the lower cover.
A wire harness W / H in an upward posture is wound around and fixed to the wire harness cover 7 with a tape 9 in advance, and the wire harness cover 7 is fitted and locked to an electric wire drawing port of an electric connection box. Thereby, the wire harness W / H is easily assembled to the electrical junction box in an upward posture.

  However, the wire harness cover 7 is provided with a tape-wrapping tongue piece 8 for fixing the wire harness W / H with tape in a downward projecting manner. There was a problem.

  Moreover, the wire harness W / H is not always routed from the lower side or the side of the electrical junction box, and may be routed from above. In that case, the wire harness W / H in the downward posture routed from above is bent and changed to the upward posture. In this case, when the wire harness cover 7 is used, the wire harness W / H is lowered downward by the length of the tape winding allowance and then changed upward, so that the wire length of the wire harness W / H is long. In addition, there is a problem in that an extra wiring space for the wire harness W / H is required.

  Further, when the wire harness cover 7 is used, as shown in FIG. 6B, the wire harness W / H in a downward posture routed from above cannot be fixed, so that the assembly workability is poor and the wire harness W There is also a problem in that the lower part of / H is likely to interfere with other parts by spreading, swinging, or breaking.

JP 2004-215418 A

  The present invention has been made in view of the above problems, and in the case where the wire harness routed from above is lowered and then pulled into the electrical junction box in an upward posture, the routing space in the lower portion can be reduced, and The issue is to provide an electrical junction box for automobiles that can improve the assembly workability.

In order to solve the above-mentioned problem, the present invention is an electrical connection box for an automobile having a configuration in which the wire harness routed from above is lowered and then pulled in an upward posture,
In a part of the side wall of the lower cover coupled to the main body case of the electrical junction box or the main body case, a lower retracting member for the wire harness is provided,
The lower retracting member includes a partition wall and an outer wall separated by a dimension that secures a lower distance of the wire harness ,
Harness fixing in which the partition wall is provided so as to constitute a part of the side wall of the main body case or the lower cover, and the outer wall is provided with a clip locking hole for inserting and locking a clip attached to the wire harness from the outside. and parts, and wherein the inner side of the partition wall, and held by inserting the wire harness therein, setting the harness guide portion for guiding the upward direction,
The wire harness locked by the outer wall is lowered below the outer wall and the lower end of the partition wall and inserted upward into the harness guide part, and the wire harness is pulled upward into the main body case. An electrical junction box for automobiles is provided.

  With the above configuration, the portion of the wire harness that is routed from above is locked and fixed with a clip at a position close to the outer wall of the lower pull-in member, and the portion of the wire harness that is pulled into the electrical junction box after being lowered is The harness guide part of the lower retracting member is inserted into a position very close to the partition wall. Therefore, the spread of the lower part of the wire harness can be suppressed, and the wiring harnesses on both the inner and outer sides can be routed as close as possible via the lower part, thus reducing the space for wiring harness in the vehicle and making electrical connection The size of the box can be reduced.

  In addition, since tape winding is not used for fixing the lower wire retracting member and the wire harness, the lower lower end position of the wire harness can be set to an upper position than the conventional one that required a tape winding allowance. The wire harness can be lowered without lowering. Therefore, the length of the wire harness can be minimized, and wasteful costs can be reduced.

Furthermore, in the work of assembling the wire harness to the electrical junction box, the wire harness routed from above is locked and fixed to the outer wall of the lower retracting member with a clamp, so that even when the wire harness is brazed or the like , It can always be routed accurately and accurately, improving workability.
In addition, this clamp can prevent the lower part of the wire harness from being shaken or scattered during assembly work or vehicle travel. From this point of view, workability is improved and vibration noise or vehicle malfunction during travel is improved. Can also be prevented.

The harness guide portion, the one end side of the partition wall projecting an L-shaped cross section of the guide frame portion is formed in a U shape by the partition walls and the guide frame portion, and the partition wall of the guide frame portion A thin hinge portion is formed at an intermediate position of the opposing wall, and a locking claw is protruded toward the partition wall at the tip of the opposing wall, and a locked portion is provided on the partition wall,
Wherein the wire harness is bent and the thin hinge portion in a state of being inserted into the harness guide portion, the locking claw and engaged with the engaged portion, and configured to hold the wire harness before Symbol harness guide portion.

  As a result, the portion of the wire harness drawn into the electrical junction box can be inserted and held without being displaced in the electrical junction box, and can be stably inserted into a more accurate fixed position. Therefore, the wire harness wiring space in the electrical junction box can be further reduced, and the electrical junction box can be further reduced in size.

  It is preferable that the lower wire retracting member for the wire harness is formed of an integrally molded part that is assembled so as to close an opening provided on a side wall of the lower cover.

  The lower retraction member may be integrally formed with the main body case or the lower cover, but is preferably configured to be retrofitted as a separate body. Accordingly, when the wire harness is clipped and attached in advance while being passed through the harness guide portion, and attached to the main body case or the lower cover in this state, the workability of connecting the wire harness to the electrical junction box can be improved. .

  As described above, according to the present invention, when the wire harness routed from above is lowered and pulled into the electrical connection box in an upward orientation, the wiring space required below the wire harness can be minimized, Thus, the wiring space in the vehicle can be used effectively, and the electrical junction box can be reduced in size. In addition, the length of the wire harness can be minimized, and the cost can be reduced.

  Furthermore, by fixing the wire harness to the outer wall of the lower retracting member with a clamp, it is possible to prevent the lower portion from swinging or becoming loose, improving the workability of assembling the wire harness to the electrical junction box, It is also possible to prevent the occurrence of problems due to interference with other parts.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 4 show an electric junction box 10 for an automobile according to a first embodiment of the present invention. As shown in FIG. 1, the electrical junction box 10 includes a main body case 11, and an upper cover 12 and a lower cover 13 that cover the upper and lower surfaces of the main body case 11.
A connector fitting portion 43 is provided in the main body case 11 for fitting and connecting the connector 41 of the terminal of the wire harness 40 drawn from the outside into the electrical connection box 10 from above. From the side of the lower cover 13 and retracted from the side.

  A wire harness lead-in opening 14 is provided in the side wall of the lower cover 13, and a separate lower lead-in member 20 is assembled to the wire harness lead-in opening 14 so as to close the opening 14. After the wire harness 40 to be routed is lowered, the wire harness 40 is drawn into the lower cover 13 in an upward posture.

  As shown in FIGS. 3 (A) and 3 (B), the lower turn retracting member 20 is routed in an upward posture after being routed with the outer routing portion 40a of the wire harness 40 routed in a downward posture from above. A partition wall 21 that partitions the inner wiring portion 40b of the wire harness 40 is provided in the center. A harness fixing portion 20A for fixing the outer wiring portion 40a of the wire harness 40 is provided outside the partition wall 21, and a harness that allows the inner wiring portion 40b of the wire harness 40 to be inserted inside the partition wall 21. The guide portion 20B is integrally formed.

As shown in FIG. 3A, the harness fixing portion 20A is provided with an outer wall 22 parallel to the partition wall 21 via a pair of connecting walls 23 outside the partition wall 21 with a required dimension. It is shaped like a letter.
The outer wall 22 is provided with a clip locking hole 24 for inserting and locking a clip 42 attached to the outer wiring portion 40a of the wire harness 40.
As shown in FIG. 3B, the interval L1 between the partition wall 21 and the outer wall 22 can be lowered with a minimum curvature within a range that does not damage the wire harness 40, and the outer wall 22, the partition wall 21, The dimension is set such that the locking blade portion 42 a of the clip 42 can be inserted into the space surrounded by the connecting wall 23.

The harness guide portion 20B, as shown in FIG. 3 (A), said projecting the cross-sectional plane L-shaped guide frame portion 25 from one side of the partition wall 21, a partition wall 21 and the guide frame portion 25 made by forming the cross Menkoji shape. A thin hinge portion 28 is formed at an intermediate position of the guide frame portion 25 facing the partition wall 21, and as shown in FIG. An opening / closing part 29 that rotates via the thin hinge part 28 is provided. Further, a locking claw 30 projects from the opening / closing portion 29 toward the partition wall 21 side.

  When a locked portion 31 is projected inside the partition wall 21 and the opening / closing portion 29 of the guide frame portion 25 is closed, the locking claw 30 is locked and locked to the locked portion 31. The harness guide portion 20B has a closed cross section.

  As shown in FIG. 4, the partition wall 21 and the vertical wall 27 of the guide frame portion 25 constitute an L-shaped corner closing wall 32 that closes the wire harness lead-in opening 14 of the lower cover 13. Yes. Of the both side edges of the corner closing wall 32, the side wall on the side of the partition wall 21 is provided with a fitting portion 33 having a U-shaped cross section in parallel with the partition wall 21, and the other side on the vertical wall 27 side. A fitting portion 34 having a U-shaped cross section is provided on the edge so as to protrude outward, that is, on the side opposite to the facing wall 26.

  Of the both side edges of the wire harness lead-in opening 14 of the lower cover 13, the side edge to which the partition wall 21 of the lower turn-in member 20 is attached is a U-shaped cross-section to be fitted to the fitting part 33. 35 is provided in a direction parallel to the side wall of the lower cover 13, and a fitting portion 36 having a U-shaped cross section that fits the fitting portion 34 is provided inwardly on the side edge to which the vertical wall 27 is attached. Yes.

  As shown in FIG. 2 and FIG. 3 (B), the wire harness 40 is installed in the electrical connection box 10 having the above-described configuration by drawing the wire harness 40 from above and lowering the wire harness 40 in an upward posture. First, as shown in FIG. 3 (B), the wire harness 40 is inserted and held in the lower retracting member 20 before being attached to the lower cover 13.

  That is, the band clip 42 is attached to a predetermined position of the outer wiring portion 40a of the wire harness 40, and the locking blade portion 42a at the tip of the band clip 42 is connected to the lower retracting member 20 as shown in FIG. It is inserted and locked from the outside into a clip locking hole 24 drilled in the outer wall 22. Next, the wire harness 40 is turned down outside the lower ends of the harness fixing portion 20A and the partition wall 21, and the inner wiring portion 40b of the wire harness 40 in an upward posture is inserted into the harness guide portion 20B. Thereafter, the closing portion 29 of the guide frame portion 25 is rotated and closed via the thin hinge portion 28, and the locking claw 30 is locked and locked to the locked portion 31, so that the wire harness 40 is connected to the harness guide portion 20B. Keep inside.

  Next, the lower turn retracting member 20 is attached by being inserted into the wire harness retracting opening 14 of the lower cover 13 from above. At this time, as shown in FIG. 4, the fitting portion 33 of the lower retracting member 20 and the fitted portion 35 of the lower cover 13 are fitted, and the fitting portion 34 of the lower retracting member 20 and the fitted portion of the lower cover 13 are fitted. The joint portion 36 is attached by being fitted to each other.

Finally, as shown in FIG. 2, the connector 41 at the tip of the wire harness 40 is fitted and connected from above to the connector fitting portion 43 inside the main body case 11.
A terminal T connected to the electric wire w from below is inserted into the connector fitting portion 43 to connect the terminal and the connector 41.

  The electrical connection box 10 having the above-described configuration uses the lower lead-in member 20, and the inner wiring portion 40a of the wire harness 40 routed from above and the inner wiring routed in an upward posture after being lowered. The rope portion 40b can be fixed at a fixed position at a fixed interval. Therefore, the distance between the outer wiring portion 40a and the inner wiring portion 40b, which has conventionally been easy to spread, can be reduced as much as possible by reducing the distance, and the wiring harness wiring space in the vehicle can be reduced. The connection box can be downsized.

  Further, since the lower retracting member 20 and the wire harness 40 are not fixed by tape winding as in the prior art, it is not necessary to lower the wire harness 40 downward to secure the tape winding allowance, and the length of the wire harness 40 is reduced. It can be minimized.

Furthermore, in the assembly work of the wire harness 40, the outer routing portion 40a can be fixed to the lower retracting member 20 first, so that the wire harness 40 with brazing or the like can be easily lowered to an accurate shape and position. , Workability is improved.
Further, since the lower portion can be prevented from swinging and falling, it is possible to prevent the wire harness 40 from interfering with other in-vehicle components during work and traveling of the vehicle.

  In addition, this invention is not limited to the said embodiment. In particular, the wire harness drawing opening may be provided on the side surface of the main body case 11 and the lower turn drawing member 20 may be attached to the main body case.

It is a disassembled perspective view of the electrical junction box which concerns on 1st embodiment of this invention. It is principal part sectional drawing which shows the state which assembled | attached the wire harness to the electrical-connection box shown in FIG. (A) is a perspective view of a lower turn retracting member, (B) is a perspective view showing a state in which a wire harness is inserted through the lower turn retracting member. It is a top view which shows the state which attached the lower winding retraction member to the lower cover. It is a figure of a prior art example. (A) and (B) are figures which show the conventional wire harness cover.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Electrical connection box 11 Main body case 13 Lower cover 14 Wire harness drawing opening 20 Lower part drawing member 20A Harness fixing | fixed part 20B Harness guide part 21 Partition wall 22 Outer side wall 24 Clamp latching hole 25 Guide frame part 26 Opposite wall 40 Wire harness 40a Outer distribution Rope 40b Inside Routine 41 Connector

Claims (3)

An electrical junction box for automobiles configured to be pulled down in an upward posture after being lowered from a wire harness routed from above,
In a part of the side wall of the lower cover coupled to the main body case of the electrical junction box or the main body case, a lower retracting member for the wire harness is provided,
The lower retracting member includes a partition wall and an outer wall separated by a dimension that secures a lower distance of the wire harness ,
Harness fixing in which the partition wall is provided so as to constitute a part of the side wall of the main body case or the lower cover, and the outer wall is provided with a clip locking hole for inserting and locking a clip attached to the wire harness from the outside. and parts, and wherein the inner side of the partition wall, and held by inserting the wire harness therein, setting the harness guide portion for guiding the upward direction,
The wire harness locked by the outer wall is lowered below the outer wall and the lower end of the partition wall and is inserted upward into the harness guide part, and the wire harness is pulled upward into the main body case. Electrical junction box for automobiles. The harness guide portion, the one end side of the partition wall projecting an L-shaped cross section of the guide frame portion is formed in a U shape by the partition walls and the guide frame portion, and the partition wall of the guide frame portion A thin hinge portion is formed at an intermediate position of the opposing wall, and a locking claw is protruded toward the partition wall at the tip of the opposing wall, and a locked portion is provided on the partition wall,
Wherein the wire harness is bent and the thin hinge portion in a state of being inserted into the harness guide portion, the locking claw and engaged with the engaged portion, and configured to hold the wire harness before Symbol harness guide portion according Item 2. An electrical junction box for automobiles according to Item 1.   The electric connection box for an automobile according to claim 1 or 2, wherein the lower wire retracting member for the wire harness is an integrally formed part that is assembled so as to close an opening provided in a side wall of the lower cover.

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