JP4175765B2 - Electric junction box harness biting prevention structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a harness biting prevention structure for a wire harness provided across the inside and outside of a box body of an electrical junction box.
[0002]
[Prior art]
In general, a vehicle such as an automobile has a box-shaped electrical junction box configured so that a large number of fuses or fusible links for protecting the electrical circuit can be inserted and removed when wiring to various electric devices to be mounted. These are arranged in appropriate spaces. The electrical junction box is sometimes called a fuse box or a fuse block, and may be called a relay box or a relay block because it may be provided with a relay or a bus bar.
[0003]
Hereinafter, the relay block will be described as an example. The relay block generally includes a relay block body provided so as to straddle the wire harness inside and outside, and an upper cover and a lower cover that engage with the relay block body. From the slit formed in the lower cover, a wire harness connected to a fusible link, a relay or the like attached to the relay block body is led out to the outside.
[0004]
The wire harness is fixed at least partly by, for example, tape winding or the like on a substantially bera-shaped or substantially semi-cylindrical lead-out guide provided on the outer peripheral wall defining the relay block main body. The lower cover is adapted to engage with the relay box body after fixing the wire harness to the guide.
[0005]
[Problems to be solved by the invention]
By the way, in the above prior art, the relay block main body and the lower cover are in a state where the wire harness led out from the relay block main body is not securely passed through the slit of the lower cover, that is, in a state where a part of the wire harness protrudes. There was a risk of engagement. If the engagement is made in such a state, the wire harness is caught near the opening edge of the slit, and the efficiency of the assembling work is reduced and the wire breaks.
[0006]
This invention is made | formed in view of the situation mentioned above, and makes it a subject to provide the harness biting prevention structure of the electrical junction box which prevents the biting of the wire harness at the time of an assembly.
[0007]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided an electrical connection box harness preventing structure according to claim 1, wherein the wire harness is provided straddling the inside and the outside, and the portion of the wire harness led to the outside is provided. A box main body formed with a substantially vera-shaped or substantially semi-cylindrical lead-out guide used for fixing, and a slit through which at least the wire harness is passed at a position corresponding to the lead-out guide; An electrical connection box having a cover engaged with the wire harness, and a harness biting prevention structure for preventing biting of the two wire harnesses extending in different directions during assembly, wherein the lead-out guide is the box body A part of the slit of the cover by the fitting between the box body and the cover. Being adapted to cover, conductor exits on both sides of the guide, said with notches and spacing extend in direction or equal to a width of the slit or a pair of walls made narrower than the width of the slit of the slit is provided The pair of walls are characterized in that either one of the walls is formed longer than the other wall in the notch direction .
[0008]
Prevention structure biting harness electrical junction box of the present invention according to claim 2, in prevention structure biting harness electrical connection box according to claim 1, secured to the derivation guide before SL one of the walls A fixing means for fixing a portion led out to the outside of a wire harness different from the above-described wire harness is provided.
[0009]
A harness biting prevention structure for an electrical connection box according to a third aspect of the present invention is the harness biting prevention structure for an electric connection box according to claim 2, wherein the hole drilled in any one of the walls, The fixing means is configured to include a clamp for fixing a harness attached to the hole.
[0010]
According to the first aspect of the present invention, when the cover is engaged with the box body, the wire harness led out to the outside of the box body is sandwiched between the pair of walls provided on both sides of the lead-out guide. Since it is located in the meantime, even if the cover is engaged with the box body, the wire harness is securely inserted into the slit without protruding. As a result, the wire harness can be reliably prevented from biting in the vicinity of the opening edge of the slit.
Even if the number of wire harnesses led out to the outside of the box body is two or more, the wire harness that is located near the opening edge of the slit is located between the pair of walls.
[0011]
According to the present invention described in claim 2, wherein another wire harness and wire harness, since fixed to the fixing means provided on one of the walls, reliably inserted into the slit without protruding naturally Can be put. Further, either one of the walls of the pair of walls, because are formed long in the other notch direction of the slit than the wall, when there is provided the fixing unit, derived from the box body There is an advantage that it becomes easy to handle a wire harness having a different extending direction later.
[0012]
According to the third aspect of the present invention, the fixing means is specific. That is, a wire harness different from the wire harness located in the vicinity of the opening edge of the slit is fixed to a harness fixing clamp attached to a hole drilled in any one of the walls. The other wire harness can be reliably inserted into the slit without protruding.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing an embodiment of a structure for preventing a harness biting of an electrical junction box according to the present invention. 2 is a side view of the box body, FIG. 3 is a front view of the box body, and FIG. 4 is a front view of the lower cover.
[0014]
In FIG. 1, the relay block denoted by reference numeral 1 includes a relay block body 2, an upper cover (not shown) that engages with the relay block body 2, and a lower cover 3. Further, from between the relay block body 2 and the lower cover 3, wire harnesses 4, 5 provided across the inside and outside of the relay block body 2 are led out. The relay block 1 corresponds to the electrical junction box described in the claims, and the present invention can be applied to a fuse block, a junction block (junction box), and the like other than the relay block 1 of the present embodiment. Shall. The relay block body 2 corresponds to the box body described in the claims, and the lower cover 3 corresponds to the cover described in the claims. In the present specification, the following description will be given assuming that the upper cover side is defined as the upper side and the lower cover 3 side is defined as the lower side with respect to the relay block body 2. First, the configuration will be described, and then the operation will be described.
[0015]
The main part of the relay block body 2 is made of a synthetic resin, and is formed in a rectangular box shape that is open at the top and bottom. A plurality of cavities 7 are arranged inside the peripheral wall 6 that forms the outer shape of the relay block body 2. Each of the plurality of cavities 7 is formed with an opening on the upper side, and a corresponding relay 8, fusible link 9, and the like are respectively attached thereto. When fixing a portion led out to the outside of the wire harness 4, for example, the front wall 10 positioned to lead out one wall of the peripheral wall 6, that is, the wire harnesses 4 and 5 to the outside of the relay block body 2 The lead-out guide 11 used is formed so as to protrude.
[0016]
The lead-out guide 11 is formed in a substantially bell shape or a substantially semi-cylindrical shape, and as is apparent from FIGS. 1 and 2 , the lead-out guide 11 is closer to the lower cover 3 side than the fitting surface 2 a between the relay block body 2 and the lower cover 3. A slit that will be described later of the lower cover 3 when the relay block main body 2 and the lower cover 3 are fitted together, and is configured so that the extended wire harness 4 can be wound and fixed with the tape 12. It covers the 19 opening edges. The lead-out guide 11 of the present embodiment is formed so as to be inclined slightly toward the end side and upward from the center of the front wall 10 (because the wire harnesses 4 and 5 of the present embodiment have different extending directions).
[0017]
A pair of walls 13, 14 are formed on both sides of the lead-out guide 11. When the wire harness 4 led out from the relay block body 2 is fixed to the lead-out guide 11 by tape winding, the wire harness 4 becomes a wall. 13 and 14 (positioning even if there is a gap), the protrusion of the harness leading to biting is regulated.
[0018]
The walls 13 and 14 will be described more specifically with reference to FIGS. 1 to 3. The walls 13 and 14 are each formed integrally with a base end (root) portion of the lead-out guide 11. Each of the walls 13 and 14 is formed in a substantially strip-like shape in which the tips of the walls 13 and 14 extend downward (corresponding to a notch direction of a slit 19 described later). Furthermore, the walls 13 and 14 are arranged such that the distance D1 is the same as or narrower than the width D2 (see FIG. 4) of the slit 19 described later, and one wall 13 is formed longer than the other wall 14. (In this embodiment, the length of the other wall 14 is approximately twice the length of the one wall 13 (see FIG. 2). However, only one harness is led out. This is not the case).
[0019]
The wall 13 is located near the center of the front wall 10. In addition, a hole 15 penetrating in a circular shape is formed on the distal end side of the wall 13, and a clamp 16 for fixing a portion of the wire harness 5 led out to the outside is attached thereto. The hole 15 and the clamp 16 correspond to the fixing means described in the claims. For example, the locking protrusion provided on the clamp 16 is configured to fit into the hole 15 (fixing means). The holes 15 and the clamps 16 are examples, and may be configured to be fixed by tape winding.
[0020]
The wall 14 is located on the end side of the front wall 10. Moreover, the length of the extending direction of the wall 14 is formed according to the diameter of the wire harness 4 (it is equal to or larger than the diameter of the wire harness 4 and does not affect the assembly). The wall 14 of this embodiment is formed so that its width is shorter than the width of one wall 13 (see FIG. 2).
[0021]
It is assumed that bus bars (not shown) are arranged in a desired pattern under the plurality of cavities 7. Further, it is assumed that the terminals of the wire harnesses 4 and 5 are electrically connected below the plurality of cavities 7. Further, the upper cover is configured to be engaged with the upper end of the peripheral wall 6 and the lower cover 3 is appropriately engaged with the lower end by a locking unit.
[0022]
On the other hand, in FIG. 1 or FIG. 3, the lower cover 3 is formed in a rectangular box shape with a bottom that is open on the side engaged with the relay block body 2 (made of synthetic resin). In addition, a U-shaped slit 19 cut out downward from an end portion for engagement is formed in a wall 18 of the peripheral wall 17 corresponding to the front wall 10. The wire harnesses 4 and 5 are inserted into the slit 19 when the lower cover 3 is engaged.
[0023]
In the above configuration, the function of the harness biting prevention structure will be described while explaining the assembly of the relay block 1 (see FIG. 1). First, the relay 8 and the fusible link 9 are mounted on the relay block body 2 and the terminals of the wire harnesses 4 and 5 are connected to predetermined positions. Then, the wire harnesses 4 and 5 are led out to the outside of the relay block body 2, and the upper wire harness 4 is fixed to the lead-out guide 11 by tape winding. At this time, the lower wire harness 5 is also fixed to the wall 13 via the clamp 16. Next, when the upper cover and the lower cover 3 are engaged with the relay block main body 2, the wire harness 5 first fixed to the wall 13 is inserted into the slit 19 on the lower cover 3 side. Subsequently, the wire harness 4 sandwiched between the walls 13 and 14 and fixed by the tape 12 is inserted into the slit 19. Thereafter, when the engagement between the lower cover 3 and the relay block main body 2 is completed and the engagement of the upper cover is also completed, a series of assembly of the relay block 1 is completed.
[0024]
The wire harnesses 4 and 5 are reliably prevented from protruding in the vicinity of the opening edge of the slit 19 by a harness biting prevention structure configured by providing the lead-out guide 11 with a pair of walls 13 and 14. As a result, the efficiency associated with the assembling work is improved, and disconnection of the wire harness is prevented. The harness biting prevention structure of the present embodiment is useful for the wire harnesses 4 and 5 having different extending directions after being led out from the relay block body 2 (the wire harness 4 extends upward). (The wire harness 5 extends downward in the opposite direction). In addition, it goes without saying that the present invention can be variously modified without departing from the spirit of the present invention.
[0025]
【The invention's effect】
As described above, according to the first aspect of the present invention, even when the cover is engaged with the box body, the wire harness is reliably inserted into the slit without protruding. Accordingly, it is possible to reliably prevent the wire harness from being bitten in the vicinity of the opening edge of the slit. Thereby, the efficiency which concerns on an assembly | attachment operation | work improves and disconnection of a wire harness is prevented.
Even if the number of wire harnesses led out to the outside of the box body is two or more, the wire harness that will be located near the opening edge of the slit is located between the pair of walls, so that it is reliably prevented from being caught. can do.
[0026]
According to the second aspect of the present invention, the wire harness different from the wire harness is fixed to the fixing means provided on one of the walls, so that it is surely inserted into the slit without protruding. Can be put. In addition, since one of the pair of walls is formed longer in the slit notch direction than the other wall, when the fixing means is provided there, the wall is led out from the box body. There is an advantage that it becomes easy to handle a wire harness having a different extending direction later.
[0027]
According to the third aspect of the present invention, the fixing means according to the second aspect is embodied, and the fixing means is attached to the hole formed in one of the walls. And a harness fixing clamp. Therefore, even if the number of wire harnesses led out to the outside of the box body is two or more by fixing the wire harness different from the wire harness that will be located near the opening edge of the slit to the clamp, the wire Biting of the harness can be reliably prevented.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a structure for preventing a harness from entering an electrical junction box according to the present invention.
FIG. 2 is a side view of the box body.
FIG. 3 is a front view of the box body.
FIG. 4 is a front view of the lower cover.
[Explanation of symbols]
1 Relay block (electric connection box)
2 Relay block body (box body)
3 Lower cover (cover)
4, 5 Wire harness 11 Derivation guides 13, 14 Wall (one wall, the other wall)
15 holes (fixing means)
16 Clamp (fixing means)
19 Slit

Claims (3)

A box body in which a wire harness is provided straddling the inside and outside, and a substantially vera-like or substantially semi-cylindrical lead-out guide used for fixing a portion led out to the outside of the wire harness, and the lead-out In the electrical junction box comprising at least a slit through which the wire harness is passed at a position corresponding to the guide and engaged with the box body, the two wires having different extending directions at the time of assembly a preventive structure biting harness to prevent the biting of the harness, the derivation guide is provided extending to the cover side of the fitting surface between the box body and the cover, and the box body and the cover A part of the slit of the cover is covered by the fitting, and both sides of the lead-out guide extend in the notch direction of the slit and have a space in front. Same or the pair of walls with a pair of walls made narrower than the width of the slit is provided to the width of the slit, either one of the walls is elongated in the direction away the cut than any other wall prevention structure biting harness electrical connection box, characterized in that there. In prevention structure biting harness electrical connection box according to claim 1, of another wire harness and the wire harness before SL one of the walls being fixed to the outlet guide, it was derived the outer portion A structure for preventing the electric connection box from being caught in a wire, characterized in that a fixing means for fixing the cable is provided.   3. The structure for preventing a harness from entering into the electrical junction box according to claim 2, wherein the fixing means comprises a hole drilled in one of the walls and a harness fixing clamp attached to the hole. An electrical junction box harness biting prevention structure characterized by that.

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