JPH09134744A - Cap mounting structure for spliced part of wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent water infiltration to a cap put on the spliced part of a wire harness. SOLUTION: A cap 7A with the insulation protecting/waterproofing function for accommodating a spliced part of a wire harness is installed on a wire harness W/H wired in a car in such an arrangement that the opening for insertion of the spliced part is facing down at all times. The cap 7A is fitted consolidatedly with a flexible belt 7e to be wound round the wire harness W/H and a detention part 7d to engage the tip of the belt 7e. Otherwise the cap 7A is fitted consolidatedly with an elastic ring to be fitted on the wire harness W/H from outside in radial direction. Otherwise, a clamp is furnished, which is composed of a base to be fixed by a tape to the periphery of the wire harness W/H, a detention part 7d to be engaged by the base rotatably, and a fit retention part which is fitted on the cap from outside in the radial direction to retain the cap 7A, and the cap 7A is fixed to the wire harness W/H through the clamp and base.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting an insulation protection / waterproof cap for accommodating a splice portion on a wire harness, and in particular, it is possible to reliably prevent water from entering the cap through an opening for inserting the splice portion. To do so.

[0002]

2. Description of the Related Art Conventionally, as a splice portion of this type of wire harness, as shown in FIG.
The core wires exposed from the ends of the plurality of H electric wires 1, 1 are connected by ultrasonic welding or the like to form a splice portion 2, and the splice portion 2 is attached to a cap 3 made of vinyl chloride for insulation protection. It is inserted through the opening 3a.

When the wire harness provided with the splice portion 2 is installed in a place where water is likely to occur such as an engine room, the cap 3 is filled with a sealant 4 such as silicon or hot melt, Open the splice part 2 3
It is waterproof so that rainwater or the like does not enter the cap 3 from a. In the operation of inserting the splice portion 2 of the electric wire 1 into the cap 3, when the filler 4 is silicon, the splice portion 2 is inserted from the opening 3a of the cap 3 and then the silicon is injected from the opening 3a. When the filler 4 is hot melt, the hot melt is injected through the opening 3a of the cap 3 and then the splice portion 2 is inserted through the opening 3a. In this way, the cap 3 covered with the splice portion is fixed by winding the tape 5 around the wire harness W / H.

[0004]

However, the above-mentioned silicone filler 4 has good waterproofness, but since the curing time is long (for example, 7 minutes) and productivity is poor, the hot-melt filler 4 is used. Is often used. The hot-melt filler 4 cures immediately, but has poor penetrability between wires,
There is a problem in terms of sealing performance. Therefore, the cap 3 is on the right side of FIG. 7 (A) with respect to the wire harness.
As described above, when the opening 3a is fixed in a direction in which rainwater or the like is received (for example, obliquely upward), rainwater or the like a near the opening 3a.
However, there is a problem that the splice portion 2 is corroded and penetrates between the wires to corrode the splice portion 2.

The present invention has been made to solve the above problems, and provides a mounting structure for a waterproof cap of a splice portion of a wire harness that can reliably prevent water from entering through an opening for inserting the splice portion of the cap. Is an issue.

[0006]

In order to solve the above problems, according to claim 1 of the present invention, insulation protection for accommodating a splice portion connecting core wires exposed from the ends of a plurality of electric wires of a wire harness. A mounting structure for the cap of the splice part of the wire harness, characterized in that the waterproof cap is attached to the wire harness arranged in the vehicle so that the opening for inserting the splice part is always downward. Are offered.

That is, according to the first aspect of the present invention, the cap is attached to the wire harness arranged in the automobile such that the opening for inserting the splice portion is always downward. Specifically, if the wire harness is installed in the vertical (vertical) direction, attach it so that the opening of the cap faces downward in the axial direction of the wire harness, and then move the wire harness in the horizontal (horizontal) direction. If they are arranged, the cap is attached so that the opening of the cap faces downward in the direction orthogonal to the axis of the wire harness. As a result, the opening for inserting the splice portion of the cap is oriented so as not to receive rainwater, and the cap can be reliably waterproofed.

According to a second aspect of the present invention, the cap is integrally provided with a flexible belt portion that is wound around the outer periphery of the wire harness and a locking portion that locks the tip of the belt portion. The present invention provides a mounting structure for a cap of a splice portion of a wire harness of.

According to the second aspect, the cap can be attached to the wire harness with one touch only by winding the belt portion integrated with the cap around the outer periphery of the wire harness and locking the tip of the belt portion with the locking portion. it can.

According to a third aspect of the present invention, the cap mounting structure of the splice portion of the wire harness according to the first aspect is integrally provided with an elastic ring-shaped portion that is fitted on the outer periphery of the wire harness from the radial direction. Are offered.

According to the third aspect, the cap can be attached to the wire harness with one touch only by fitting the elastic ring-shaped portion integrated with the cap to the outer periphery of the wire harness.

According to a fourth aspect of the present invention, a base fixed to the outer periphery of the wire harness with a tape, a locking portion rotatably locked to the base, and the cap are radially externally fitted to hold the prevention cap. A fitting having a fitting holding portion is provided, and the cap is attached to the wire harness via the clamp and the base, and the cap mounting structure for the splice portion of the wire harness is provided. Further, the cap is integrally provided with a rib that restricts movement when fitted to the fitting holding portion of the clamp. (Claim 5)

According to the fourth aspect of the present invention, the clamp is rotatably locked to the base fixed to the outer periphery of the wire harness by the tape, and the cap is simply fitted to the fitting holding portion of the clamp to remove the cap. It can be attached to the wire harness with one touch. Also, since the clamp rotates, if the wire harness is installed in the vertical direction, the clamp can be rotated so that the cap is in the axial direction of the wire harness, and the wire harness moves in the horizontal direction. If the cable is routed, the clamp can be rotated so that the cap is in the direction orthogonal to the axis of the wire harness. Therefore, the wire harnesses can be shared even if they are installed in different directions.

Further, when the rib is provided on the cap as described in claim 5, it is possible to prevent the cap from being accidentally dropped from the fitting holding portion of the clamp.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that parts having the same configurations and functions as those of the conventional technique shown in FIG.

1 and 2 show the mounting structure of the caps 7A and 7B of the first embodiment. The cap 7A is a cap for a wire harness W / H arranged vertically, and the cap 7B is a cap. , A cap for the wire harness W / H arranged in the left-right direction.

As shown in FIG. 1, the cap 7A is formed of PCV or the like as in the conventional case, and the head portion 7b is closed, but the splice portion 2 is inserted into the lower surface of the body portion 7c. It has an opening 7a. Body 7 of the cap 7A
On the outer circumference of c, a rectangular tubular locking portion 7d directed toward the outer circumference of the vertical wire harness W / H and a flexible belt portion 7e extending from the locking portion 7d are integrally formed. There is. The extending direction of the belt portion 7e is the body portion 7 of the cap 7A.
The direction is orthogonal to the length direction of c. A saw tooth portion 7f is formed at the tip of the belt portion 7e. Although not specifically shown, a locking claw for locking one of the sawtooth portions 7f of the belt portion 7e inserted into the slit 7g is formed in the slit 7g of the locking portion 7d.

When the cap 7A is used, hot melt is injected from the opening 7a of the cap 7A, and then the splice portion 2 is inserted from the opening 7a, as in the conventional case. In the cap 7A, the opening 7a of the cap 7A faces downward so that the locking portion 7d of the cap 7A is connected to the wire harness W /
Put the belt 7e on the outer circumference of H and wire harness W
Wrap around the outer periphery of / H, insert the tip of the belt portion 7e into the slit 7g of the locking portion 7d, and lock with the locking claw of the locking portion 7d of the belt portion 7e. In this way, the cap 7A can be attached to the wire harness W / H with one touch.

At this time, since the opening 7a of the cap 7A is always downward with respect to the wire harness W / H arranged in the vertical direction, that is, the insertion opening 7a does not receive rainwater or the like, the cap 7A is not attached. You will definitely be waterproof. The cap 7A includes a locking portion 7d and a belt portion 7e.
Since it is only integrally molded, the structure is simple and inexpensive.

On the outer periphery of the body portion 7c of the cap 7B shown in FIG. 2, there is provided a square cylindrical locking portion 7d facing the outer circumferential direction of the wire harness W / H in the left-right direction and extending from the locking portion 7d. The flexible belt portion 7e is integrally formed. The extending direction of the belt portion 7e is the same as the length direction of the body portion 7c of the cap 7B.

When the cap 7B is used, the cap 7
After inserting the splice part 2 from the opening 7a in the same manner as A, the opening 7a is directed downward, the locking part 7d of the cap 7B is applied to the outer periphery of the wire harness W / H, and the belt part 7e is attached. When the tip end of the belt portion 7e is inserted into the slit 7g of the locking portion 7d after being wound around the outer periphery of the wire harness W / H, the belt portion 7e is locked by the locking claws of the locking portion 7d, and the wire harness W / The cap 7B is attached to H with one touch.

At this time, since the opening 7a of the cap 7B always faces downward with respect to the wire harness W / H arranged in the left-right direction, the cap 7B can be reliably waterproofed.

In the above caps 7A and 7B (the same applies to the following caps 7C to 7E), the filler 4 is not always necessary, and when the filler 4 is not injected, in order to improve the tear strength, the filler shown in FIG. ), It is preferable that the root of the electric wire 1 is wound around the wire harness W / H with the tape 5 and fixed.

3 and 4 show a mounting structure of the caps 7C, 7C of the second embodiment. The cap 7C is a cap for the wire harness W / H arranged vertically, and the cap 7D is a cap for the wire harness W / H arranged horizontally.

As shown in FIG. 3, the body portion 7 of the cap 7C is
An elastic ring-shaped portion 7h that is fitted along the outer periphery of the vertical wire harness W / H is integrally formed on the outer periphery of c. That is, the elastic ring-shaped portion 7h is formed in the direction orthogonal to the length direction of the body portion 7c.

In the case of the cap 7C, like the cap 7A, after the splice portion 2 is inserted through the opening 7a, the opening 7a is directed downward so that the cap 7C is closed.
When the ring-shaped portion 7h is expanded and fitted on the outer periphery of the wire harness W / H, the cap 7C is attached to the wire harness W / H with one touch. At this time, since the opening 7a of the cap 7C always faces downward with respect to the wire harness W / H arranged in the vertical direction, the cap 7C can be reliably waterproofed.

On the outer periphery of the body portion 7c of the cap 7D shown in FIG. 4, an elastic ring-shaped portion 7h is formed integrally with the outer periphery of the wire harness W / H in the left-right direction. That is, the elastic ring-shaped portion 7 is formed in the same direction as the length direction of the body portion 7c.
h. In the cap 7D, the cap 7
Similarly to A, after inserting the splice portion 2 from the opening 7a, the opening 7a faces downward, and the elastic ring-shaped portion 7h of the cap 7D is spread and fitted to the outer periphery of the wire harness W / H. Wire harness W / H
The cap 7D is attached to the one-touch. At this time, since the insertion opening 7a of the cap 7D is always downward with respect to the wire harness W / H arranged in the left-right direction,
The cap 7D can be reliably waterproofed.

FIGS. 5 and 6 show a mounting structure of the cap 7E of the third embodiment. The cap 7E can be commonly used by the wire harness W / H arranged in the vertical direction and the horizontal direction. .

As shown in FIG. 5, a rectangular base 8 is provided, and a locking hole 8a is formed at one end of the base 8.
A cross-shaped cut 8b is formed in the peripheral portion of the locking hole 8a so as to be easily bent in the plate thickness direction. Further, a clamp 9 is provided, and the locking hole 8a is provided in the clamp 9.
A hook portion 9b is formed so that the hook portion 9b is fitted while bending the peripheral edge portion so as not to come off, and is rotatably locked, and the cap 7E is provided on the upper portion of the hook portion 9b.
The fitting holding portion 9a having elasticity that fits the outer periphery of the body portion 7c in the radial direction is integrally formed.

On the other hand, when the fitting holding portion 9a is fitted on the outer periphery of the body portion 7c of the cap 7E, the fitting holding portion 9a
ribs 7i that engage with both ends of a and restrict axial movement,
7i is integrally molded.

When the cap 7E is attached to the wire harness W / H arranged in the vertical direction, the cap 7E shown in FIG.
As shown in (A), the base 8 is fixed to the outer periphery of the wire harness W / H with the tape 10 in the vertical direction. At this time,
The fitting holding portion 9a of the clamp 9 is rotated with respect to the base 8 so as to be vertically oriented (axial direction of the wire harness W / H).

When the wire harness W / H installed in the left-right direction is attached, as shown in FIG. 6 (B),
The base 8 is fixed to the outer periphery of the wire harness W / H with the tape 10 in the left-right direction. At this time, the fitting holding portion 9a of the clamp 9 is rotated with respect to the base 8 so as to be oriented vertically (direction orthogonal to the axis of the wire harness W / H).

After that, the wire harness W / H in the up-down direction and the left-right direction is common, and after inserting the splice portion 2 from the opening 7a, the insertion opening 7a is directed downward in the same manner as the cap 7A. When the fitting holding portion 9a is spread and fitted by the body portion 7c of the cap 7E,
The cap 7E is attached to the wire harness W / H with one touch. At this time, each cap 7E has an opening 7a.
Is always facing downward, so the cap 7E can be reliably waterproofed.

When the cap 7E is used, the wire harness W / H can be shared even if the wiring directions are different, so that it is not necessary to provide many kinds of caps. Further, the rib 7i allows the clip portion 9 of the clip 9 to be
It is possible to prevent the cap 7E from being accidentally dropped from a.

In each of the above-mentioned embodiments, the caps 7A ...
In addition to the belt portion 7e, the elastic ring-shaped portion 7h, or the fitting holding portion 9a, the wire 7E can be attached to the outer periphery of the wire harness W / H simply with an insulating tape with the opening 7a facing downward.

[0036]

As is apparent from the above description, the cap mounting structure according to claim 1 of the present invention is such that the opening for inserting the splice portion is always downward in the wired wire harness. Since the cap is attached, the opening of the cap is oriented so as not to receive rainwater or the like, and it is possible to reliably prevent the cap from being flooded. In addition, the structure is simple and costly because it only needs to consider the mounting direction of the cap to the wire harness.

According to a second aspect of the present invention, the belt portion integrated with the cap is wound around the outer periphery of the wire harness and the tip of the belt portion is locked by the locking portion. The cap can be attached to the wire harness with one touch simply by fitting the ring-shaped portion to the outer periphery of the wire harness.

Further, as described in claim 4, the clamp is rotatably locked to the base fixed to the outer circumference of the wire harness with the tape, and the cap is fitted to the fitting holding portion of the clamp. The cap can be attached to the wire harness with one touch. Moreover, since the clamp rotates, it can be shared even if the wiring harnesses are installed in different directions. Further, as in claim 5,
If the cap is provided with ribs, it is possible to prevent the cap from being accidentally dropped from the fitting holding portion of the clamp.

[Brief description of the drawings]

FIG. 1 is a cap attached to a wire harness in a vertical direction according to a first embodiment of the present invention, (A) is a perspective view of an attached state, and (B) is a perspective view of a cap.

2A and 2B are caps attached to the wire harness in the left-right direction according to the first embodiment of the present invention, FIG. 2A is a perspective view of an attached state, and FIG. 2B is a perspective view of the cap.

FIG. 3 is a cap attached to a wire harness in a vertical direction according to a second embodiment of the present invention, (A) is a perspective view of an attached state, and (B) is a perspective view of the cap.

FIG. 4 is a cap attached to a wire harness in a left-right direction according to a second embodiment of the present invention, (A) is a perspective view of an attached state, and (B) is a perspective view of the cap.

5A and 5B are caps attached to a wire harness according to a third embodiment of the present invention, FIG. 5A is an exploded perspective view before attachment, FIG. 5B is a sectional view of a clip, and FIG. 5C is a sectional view of a base. .

6A is a perspective view showing a state in which the cap shown in FIG. 5 is attached to a vertical wire harness, and FIG. 6B is a perspective view showing a state in which the cap shown in FIG. 5 is attached to a horizontal wire harness. It is a figure.

FIG. 7 is a perspective view of a cap attached to a conventional wire harness in a mounted state, and FIG. 7B is a sectional view of the cap.

[Explanation of symbols]

 W / H wire harness 1 electric wire 2 splice part 7A to 7E cap 7a opening 7d locking part 7e belt part 7h ring-shaped part 7i rib 8 base 9 clip 9a clip part 9b hook part 10 tape

Claims (5)

[Claims] 1. A cap for insulating protection and waterproofing, which accommodates a splice part connecting core wires exposed from ends of a plurality of electric wires of a wire harness, is spliced to a wire harness arranged in a vehicle. A mounting structure for a cap of a splice portion of a wire harness, characterized in that the opening for inserting the portion is always attached downward. 2. The wire harness according to claim 1, wherein the cap is integrally provided with a flexible belt portion that is wound around the outer periphery of the wire harness, and a locking portion that locks the tip of the belt portion. Mounting structure of the splice cap. 3. The mounting structure for a cap of a splice portion of a wire harness according to claim 1, wherein the cap is integrally provided with an elastic ring-shaped portion that is fitted on the outer periphery of the wire harness in the radial direction. 4. A base fixed to the outer periphery of the wire harness with a tape, a locking portion rotatably locked to the base, and a fitting for externally fitting the cap in a radial direction to hold the prevention cap. The mounting structure for a cap of a splice part of a wire harness according to claim 1, wherein a clamp having a holding part is provided, and the cap is mounted to the wire harness via the clamp and the base. 5. The mounting structure for a cap of a splice portion of a wire harness according to claim 4, wherein the cap is integrally provided with a rib that restricts movement when fitted to a fitting holding portion of a clamp.