JPH08171945A - Splice protector for wire harness - Google Patents

Abstract

PURPOSE: To carry out fitting while observing the fitted-in condition of a wire harness and a splice and thus improve workability by fitting the splice of the wire harness from the radial direction into a fitting hole in one of two-split cases. CONSTITUTION: When the splice 4 of a wire harness (W/H) is fitted into split cases 11A, 11B, the cases 11A, 11B are kept pen at a hinge 11f. The wire 1 and the splice 4 of the W/H are fitted through the radial direction into a fitting hole 11d in the case 11B and then the case 11A, 11B are combined. At this time, the W/H can be fitted therein while obserbing the condition of fitting the wire 1 and the splice 4 into the hole 11d, thus to improve workability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protector for accommodating and protecting a splice portion of a wire harness in which core wires exposed from the ends of a plurality of electric wires are connected to each other, and more particularly to a pulling force for accommodating the electric wires. Also, the electric wire can be reliably held even if a tearing force is applied, and the splice portion can be easily and surely accommodated and held.

[0002]

2. Description of the Related Art Conventionally, as a protective cap or protective housing for the splice portion of this type of wire harness, for example, as shown in FIG. A splice part 4 formed by connecting 1a and 1a with a terminal 3 is inserted into an elastomer bag-like cylinder (splice part protection cap 5) having one end open and the other end closed. It is disclosed that the protective cap 5 is fixed by winding the adhesive tape 6 around the protective cap 5 and the insulating coatings 1b, 1b of the electric wires 1, 1 to insulate and protect the splice portion 4.

Further, in Japanese Patent Laid-Open No. 6-203891, as shown in FIGS. 8A and 8B, a protective housing 7 made of synthetic resin is provided, and the splice portion 4 is provided in the holding housing 7.
Is inserted, the electric wire 1 group is passed over the concave portion 7a provided in the holding housing 7, and is pressed by the projection 7b protruding from the cover 7d.

[0004]

However, when the protective cap 5 is used, when the splice portion 4 of the electric wire 1 is inserted into the cap 5, it is necessary to widen the insertion port of the cap 5, so that workability is reduced. In addition, in order to prevent the elastomeric cap 5 from being pierced by the exposed core wire 1a of the electric wire 1, it is necessary to increase the thickness of the cap 5 or use a wear resistant synthetic resin. High cost.

Further, it is weak against the force of tearing (peeling) each electric wire 1 in the left-right direction (see arrows a and b in FIG. 7). Therefore, when a strong tearing force is applied, the adhesive tape 6 and the cap 5 are twisted toward the closed end face side, and the splice part 4 is finally disengaged from the cap 5, and the core wire 1a is exposed and the splice part is exposed. There was a risk that the connection of 4 was disconnected.

Further, even when a backward pulling force in the direction of the arrow c is applied to the electric wire 1, the electric wire 1 is weak against the pulling force, and the electric wire 1 and the splice portion 4 are pulled out from the cap 5 and the core wire 1a. There is a risk that the splice portion 4 will be disconnected and the like will be exposed.

On the other hand, when the above-mentioned protective housing 7 is used, the electric wire 1 is pressed between the concave and convex portions provided on the inner surface of the protective housing 7, and the electric wire 1 is retained even if pulling force is applied to the electric wire 1. However, since the dimension between the concave and convex portions is constant, the cover 7d having the convex portion 7b is locked to the case body 7e when the amount of electric wires to be inserted increases. Therefore, there is a problem that the electric wire 1 cannot be housed and protected in the housing 7.

Further, the splice portion 4 at the end of the electric wire 1 is inserted and fixed in the rigid accommodating portion 7c formed of a closed cylindrical portion, but when the splice portion 4 is larger than the size of the rigid accommodating portion 7c. Cannot insert. That is, the splice part 4
The protective housing 7 must be provided in accordance with the size and the amount of electric wires, and the versatility is poor.

Further, since the rigid accommodating portion 7c is in the closed state as described above, the inserting state cannot be confirmed during the inserting operation of the electric wire 1 and the splice portion 4,
Therefore, there may occur a problem that the splice part 4 is not completely housed in the rigid housing part 7c.

The present invention has been made in order to solve the above-mentioned problems, and has strength against both pulling force and tearing force, surely holds and protects the splice portion of the end of the wire, and the splice. An object of the present invention is to provide a protector capable of easily and surely accommodating and holding a part.

[0011]

In order to achieve the above object, the present invention provides, in claim 1, a splice portion for connecting core wires exposed from ends of a plurality of electric wires to each other. In addition, a conical case made of soft rubber or synthetic resin is provided, a taper male screw is engraved on the outer peripheral surface of the case, and a small diameter portion is opened at the large diameter portion at the axial center of the case. An insertion hole having a hole bottom in which the splice portion of the wire harness can be inserted is formed, and the case is divided into two in the diametrical direction along the axis, while the outer peripheral surface of the case on the large diameter side is formed. A nut having a taper female screw capable of screwing with the taper male screw engraved on the inner peripheral surface thereof is provided, and the taper female screw of the nut is screwed into the taper male screw of the case divided into the above two parts to fit into the fitting hole of the case. Wire harness inserted And it provides a splice protection of the wire harness, which comprises dressed clamping the splice portion with insertion hole.

Further, a protrusion for pressing the splice portion of the wire harness against the inner peripheral surface of the fitting hole of the other case is provided on the inner peripheral surface of the fitting hole of the one of the two divided cases. Is preferred. (Claim 2) Furthermore, it is preferable that the two divided cases are integrally connected by a hinge portion on the small diameter portion side. (Claim 3)

[0013]

According to the first aspect of the present invention, the splice portion of the wire harness is radially inserted into the insertion hole of the one of the two divided cases, so as to check the fitted state of the wire harness and the splice portion. Because it can be inserted
Good workability.

Further, after the splice portion of the wire harness is fitted into the fitting hole of one of the split cases, the fitting hole of the other split case is fitted into the splice portion of the wire harness from the radial direction to combine the split cases. By screwing the taper female thread of the nut into the taper male thread of both split cases, the splice part of the wire harness fitted in the fit holes of both split cases will be clamped by the fit holes, so the tearing force and pulling force The movement of the electric wire, which acts when the addition is added, is surely prevented by sandwiching the fitting hole. Further, since the female screw of the nut is screwed into the male screw of both split cases, the nut tightening work can be performed with one touch by using the torque tightener.

Furthermore, even if the wire amount of the wire harness increases and the diameter becomes large, and the splice portion becomes large, the male threads of both split cases are tapered, so the soft nut is deformed and the tapered female thread is , The large-diameter wire harness and the large splice part, which are screwed into the tapered male threads of the open split case, and are inserted into the insert holes of both split cases, are securely clamped in the insert holes, improving versatility. .

When a protrusion is provided on the inner peripheral surface of the fitting hole of one of the split cases, the splice part of the wire harness can be pressed against the inner peripheral surface of the fitting hole of the other split case. This makes it possible to clamp the wire harness more strongly. Further, when the two divided cases are integrally connected by the hinge portion as in claim 3, the both divided cases can be molded at the same time, which reduces the cost, and the both divided cases can be opened and closed by the hinge portion. Will be good.

[0017]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. It should be noted that parts having the same configurations and functions as those of the prior art shown in FIG. As shown in FIGS. 3 and 4, each electric wire 1 of the wire harness W / H
The protector of the splice part 4 is composed of a conical case 11 made of soft rubber or synthetic resin and a nut 12.

On the outer peripheral surface of the case 11, a taper male screw 11a is engraved. As shown in FIG. 5, the shaft center of the case 11 is provided with a tapered insertion hole 11d that is open to the large diameter portion 11b of the case 11 and has a small diameter portion 11c with a hole bottom. The electric wire 1 and the splice portion 4 of the wire harness W / H are inserted into the fitting hole 11d.
Is inserted (see FIG. 1).

The case 11 is divided into two in the diametrical direction with the axial center as a boundary, and the tapered male screw 11a and the fitting hole 11d are half each formed on the outer peripheral surface and the inner peripheral surface of the two divided cases 11A and 11B. Will be formed.

Fitting hole 11 of the above-mentioned one divided case 11A
The inner peripheral surface of d is integrally provided with an axial protrusion 11e that presses the splice portion 4 of the wire harness W / H against the inner peripheral surface of the other split case 11B.

Also, the above-mentioned divided cases 11A and 11B.
Are integrally connected by a thin hinge portion 11f at the end of the small diameter portion 11c. In addition, both split cases 11A, 1
1B may be integrally connected by the hinge portion 11f at the end on the large diameter portion 11b side, or may not be connected by the hinge portion 11f. If the hinge portions 11f are connected, both the split cases 11A and 11B can be molded at the same time, which reduces the cost. In addition, both split cases 11A, 11
Since B can be opened and closed by the hinge portion 11f, the workability of assembling is improved.

As shown in FIG. 6, the nut 12 has a taper female screw 12a formed on the inner peripheral surface thereof, which can be screwed into the taper male screw 11a on the outer peripheral surface of the case 11 on the large diameter portion 11b side. There is.

That is, as shown in FIG.
The male thread 11a has the same thread pitch, but the outer diameter (thread diameter) gradually decreases from the large diameter portion 11b toward the small diameter portion 11c, and the inner diameter (thread thread) of the tapered female screw 12a of the nut 12 is Diameter) to the small diameter portion 11 of the case 11.
When it is set so that it can be screwed into the tapered male screw 11c on the outer peripheral surface on the c side, the nut 12 is fixed to the large diameter portion 11b of the case 11.
It becomes impossible to screw it to the side.

Therefore, the tapered female screw 1 of the nut 12
The inner diameter of 2a is set so that it can be screwed into the tapered male screw 11c on the outer peripheral surface of the case 11 on the large diameter portion 11b side. In this case, the taper female screw 12a of the nut 12 does not engage with the taper male screw 11a of the case 11 on the side of the small diameter portion 11c. Therefore, it is possible that the taper male screw 11a of the side of the small diameter portion 11c is not necessary. As described above, the tapered male screw 11a on the small diameter portion 11c side is also necessary and indispensable.

With the above construction, when the splice portion 4 of the wire harness W / H is fitted into the split cases 11A and 11B, as shown in FIG.
A and 11B are opened by the hinge part 11f. Then, the wire harness W / H is inserted into the fitting hole 11d of the split case 11B.
The electric wire 1 and the splice part 4 are inserted from the radial direction (upward in FIG. 4). At this time, since the wires 1 and the splice portion 4 of the wire harness W / H can be fitted into the fitting hole 11d while checking the fitting state, the wire harness W / H can be fitted completely into the fitting hole 11d and the workability is also good.

Thereafter, the divided case 11A is attached to the hinge portion 11
When closed at f, the fitting holes 11d of the split case 11A are fitted into the wire 1 and the splice portion 4 of the wire harness W / H from the radial direction (the upward direction in FIG. 4), so that the split cases 11
A and 11B are combined as shown in FIG.

The taper female screw 12 of the nut 12
When a is screwed into the tapered male screw 11a from the small diameter portion 11c side of both split cases 11A and 11B, the tapered female screw 12a of the nut 12 is screwed into the tapered male screw 11a of the large diameter portion 11b side of both split cases 11A and 11B. Then, the split cases 11A and 11B are tightened in the closing direction, and the electric wire 1 and the splice portion 4 of the wire harness W / H fitted in the fit holes 11d of the split cases 11A and 11B are clamped by the fit holes 11d. become. Also, split case 1
The electric wire 1 and the splice part 4 of the wire harness W / H are divided into the split case 11B by the protrusion 11e of the fitting hole 11d of 1A.
Since it is pressed against the inner peripheral surface of the fitting hole 11d, it is more firmly sandwiched.

As described above, the electric wire 1 and the splice portion 4 of the wire harness W / H are fitted into the fitting hole 11d by tightening the two divided cases 11A and 11B by screwing the nut 12.
Since it is strongly sandwiched by the projection 11e, the movement of the electric wire 1 can be reliably prevented even if the tearing force indicated by the arrows a and b and the pulling out force indicated by the arrow c in FIG. 1 are applied. . The nut 12 can be screwed into both the split cases 11A and 11B with one touch by using a torque tightener.

On the other hand, when the wire amount of the wire harness W / H increases and becomes large in diameter and the splice portion 4 also becomes large, the splice portion 4 of the wire harness W / H is inserted as shown in FIG. When doing so, after inserting the electric wire 1 and the splice portion 4 of the wire harness W / H from the radial direction into the insertion hole 11d of the split case 11B, the split case 11A is then inserted.
Is closed by the hinge portion 11f, and the fitting hole 11d of the split case 11A is fitted in the electric wire 1 and the splice portion 4 of the wire harness W / H from the radial direction.

At this time, the outer diameter D of the wire harness W / H
1 is larger than the outer diameter D2 of the wire harness W / H in FIG. 1, the large diameter portions 11b and 11b of both cases 11A and 11B are widened as shown in FIG.
When viewed from the front (see arrow A), b and 11b have an elliptical shape with the major axis in the vertical direction. However, both split cases 1
1A, 11B male screw 11a and nut 12 female screw 1
2a is a taper screw, and both split cases 11
Since A and 11B and the nut 12 are made of a soft synthetic resin, when the tapered female screw 12a of the nut 12 is fitted to the tapered male screw 11a from the small diameter portion 11c side of both split cases 11A and 11B, both of them are shown in FIG. Division case 11
The outer diameter of the taper male screw 11a and the taper female screw 12 are substantially in the middle of the large diameter portion 11b and the small diameter portion 11c of A and 11B.
The inner diameter of “a” substantially matches.

Therefore, if the tapered female screw 12a of the nut 12 is forcibly screwed into the tapered male screw 11a of the two partial cases 11A and 11B from this position, the soft nut 12 is deformed into an elliptical shape while the tapered female screw 12a is being deformed.
Becomes to be screwed into the taper male screw 11a, both partial cases 11A and 11B are tightened, and the electric wire 1 and the large splice portion 4 of the large-diameter wire harness W / H are also
The insertion hole 11d and the protrusion 11e can firmly hold the object. As a result, the protector of this embodiment can be used even when the electric wire 1 and the splice portion 4 of the wire harness W / H are slightly different in outer diameter and size, and is highly versatile.

[0032]

As is apparent from the above description, the splice portion protector for a wire harness according to the present invention allows the splice portion of the wire harness to be fitted radially into the fitting hole of one of the two divided cases. The workability can be improved because the wire harness and the splice can be fitted while watching the fitted state.

Also, after inserting the splice portion of the wire harness into the insertion hole of one of the split cases, the insertion hole of the other split case is inserted into the splice portion of the wire harness from the radial direction to combine the split cases. Since the taper female thread of the nut is screwed into the taper male thread of both split cases, the splice part of the wire harness fitted in the fit holes of both split cases is clamped by the fit holes and tearing or pulling force is added. The movement of the working wire is
By sandwiching the fitting hole, it can be surely prevented.
Further, since the female screw of the nut is screwed into the male screw of both split cases, the nut can be screwed with one touch by using a torque tightener, and the screwing workability of the nut is also improved.

Furthermore, even if the wire amount of the wire harness increases and the diameter becomes large, and the splice portion becomes large, the male threads of both split cases are tapered. Since it is screwed into the tapered male screw of both open split cases, the large-diameter wire harness and the large splice part fitted in the insert holes of both split cases are securely sandwiched in the insert holes, improving versatility. Like

On the other hand, when a protrusion is provided on the inner peripheral surface of the fitting hole of one split case, the splice part of the wire harness is pressed against the inner peripheral surface of the fit hole of the other split case. The wire harness can be clamped more strongly. Further, when the two divided cases are integrally connected by the hinge portion as in claim 3, the both divided cases can be molded at the same time, which reduces the cost, and the both divided cases can be opened and closed by the hinge portion. Will be good.

[Brief description of drawings]

FIG. 1 is a protector of the present invention, in which (A) is a cross-sectional view in which a small-diameter wire harness is sandwiched and (B) is a front view.

FIG. 2 is a cross-sectional view of a protector in which a large-diameter wire harness is sandwiched.

FIG. 3 is a perspective view of a protector.

FIG. 4 is a perspective view of a protector with a split case opened.

5A is a cross-sectional view of the protector, and FIG. 5B is a front view.

6A is a cross-sectional view of the nut, and FIG. 6B is a front view.

FIG. 7 is a perspective view of a conventional protector.

8A is a perspective view of a conventional protector, and FIG. 8B is a sectional view.

[Explanation of symbols]

 W / H Wire harness 1 Electric wire 4 Splice part 11 Case 11A, 11B Split case 11a Tapered male screw 11b Large diameter part 11c Small diameter part 11d Fitting hole 11e Projection part 11f Hinge part 12 Nut 12a Tapered female screw

Claims (3)

[Claims] 1. A housing for protecting a splice portion in which core wires exposed from ends of a plurality of electric wires are connected to each other, wherein a conical case made of soft rubber or synthetic resin is provided, and the case is provided. A taper male screw is engraved on the outer peripheral surface of the case, and at the shaft center of the case, there is a fitting hole into which the splice part of the wire harness can be fitted, having a hole bottom in the large diameter part and a small diameter part. The case is divided into two in the diametrical direction along the axis, and a nut having a taper female screw threaded on the inner peripheral surface thereof, which can be screwed into the taper male thread on the outer peripheral surface of the case on the large diameter side, is provided. A wire harness characterized in that the taper female screw of the nut is screwed into the taper male screw of the case divided into two parts, and the splice part of the wire harness fitted in the fitting hole of the case is sandwiched by the fitting hole. Splice protective equipment. 2. A protrusion that presses the splice portion of the wire harness against the inner peripheral surface of the fitting hole of the other case is provided on the inner peripheral surface of the fitting hole of the one of the two divided cases. Item 1. A splice part protector for a wire harness according to Item 1. 3. The splice part protector for a wire harness according to claim 1, wherein the two divided cases are integrally connected by a hinge part on the small diameter part side.