JPH10248137A - Structure and assembling method of wire harness covered with corrugate tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve efficiency in passing a bundle of wires into a corrugate tube. SOLUTION: In a wire harness, a bundle of wires has a plurality of terminals and an outer corrugate tube around the bundle of wires. A plurality of grooves 11a around the corrugate tube 11 is constituted by two surrounding walls with different widths. Each groove 11 is made up of a first surrounding wide wall 11b and a second surrounding narrow wall 11c adjoining to each other. When the corrugate tube 11 is shrunk, the second narrow wall 11c is inserted in the first wide wall 11b, and the overlapped state of these walls 11b and 11c is held. Then, the bundle of wires (W) is passed through the corrugate tube 11 in its shrunk state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure and an assembling method of a wire harness sheathed with a corrugated tube, and more particularly, to an improvement in workability of inserting an electric wire into a corrugated tube and to a wiring harness wiring form. This is to make it easy to respond.

[0002]

2. Description of the Related Art Conventionally, a wire harness routed inside an automobile is provided with a cylindrical corrugated tube which repeats an annular concave and convex portion in a longitudinal direction at a required position of a wire bundle constituting the wire harness. The wire bundle is prevented from being damaged by interference with other members. As shown in FIG. 6A, the corrugated tube has a split grooved corrugated tube 1 in which a split groove 1a is formed along the length direction.
Split grooveless corrugated tube 1 'without split groove shown in (B)
Are roughly divided into

As shown in FIGS. 7A and 7B, a tape T is wound around the wire bundle W at equal intervals to form the corrugated tube 1 with split grooves in the wire bundle W. After fixing,
By pushing the split groove 1a into the wire bundle W, the corrugated tube 1 with the split groove is sequentially packaged along the wire bundle W. On the other hand, in the case of using the split groove-free corrugated tube 1 ', as shown in FIG. From the other end.

[0004]

When the above-mentioned corrugated tube 1 with a groove is used, the corrugated tube 1 can be mounted relatively easily even when the exterior area is long, but since it has the groove 1a, As shown in FIG. 7 (C), the corrugated tube 1 is protected from being damaged by the wire protruding from the groove.
The tape T must be wound in a half-wrap around the outer periphery of the above, and there is a problem in workability. On the other hand, in the case of using the split groove-free corrugated tube 1 ′, there is no problem in terms of damage to the electric wire, but since the electric wire with the terminal is directly inserted into the corrugated tube 1 ′, the terminal 2 is caught by the unevenness of the inner periphery, and the Insertion work is troublesome, especially if the exterior area is long,
The insertion work was extremely difficult due to the terminal 2 being hooked and the wire itself being broken. In addition, although the conventional corrugated tube has flexibility, it returns to a linear shape by the elastic restoring force when the application of the bending force is released, so that the shape is fixed three-dimensionally according to the wiring harness wiring configuration. It was difficult.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and by using a corrugated tube without a split groove which can be held in a contracted state, it is possible to improve the workability of inserting an electric wire into the corrugated tube, It is an object to improve the responsiveness of a wiring harness to a wiring configuration.

[0006]

In order to solve the above-mentioned problems, the present invention relates to a wire harness structure in which a corrugated tube is provided on a wire bundle of a plurality of electric wires with terminals. Is such that a number of grooves formed on the outer periphery are composed of two peripheral walls having different widths, and each groove is connected so that a narrow second peripheral wall is connected to a wide first peripheral wall of an adjacent groove. When the corrugated tube is contracted, the second peripheral wall is fitted into the first peripheral wall and polymerized, and is configured to be able to maintain the polymerized state. Provides the structure of the wire harness.

According to the structure of the first aspect, since the corrugated tube can be maintained in a superposed state in which the second peripheral wall is fitted into the first peripheral wall, the corrugated tube can be adjusted to an arbitrary length.
Therefore, when the length dimensions are similar even at different mounting portions of the corrugated tube, a common corrugated tube can be applied, and the management of the exterior parts is simplified.

[0008] The corrugated tube sheathed on the wire bundle is bent at a bent portion corresponding to the wiring harness wiring form,
The second peripheral wall is bent so as to be fitted into the first peripheral wall so as to maintain a superposed state to form a bent portion, and at least the bent portion is tape-wound to fix the bent form. (Claim 2). With this configuration, the inner peripheral side of the corrugated tube has the second peripheral wall of the first peripheral wall at the bent portion.
Can be maintained in a superimposed state in which the corrugated tube is fitted in the peripheral wall of the wire harness, so that the portion where the corrugated tube is externally fitted can conform to the three-dimensional form of the wire harness corresponding to the actual mounting state. By fixing the bent portion with a tape in such a state, the same operation as that of the protector for fixing the three-dimensional configuration can be achieved, and a high-precision wire harness can be easily manufactured.

In the corrugated tube sheathed on the wire bundle, the second peripheral wall is fitted into the first peripheral wall in a region where the wire harness is arranged and interferes with other members so that the overlapping state can be maintained. To form a reinforced part,
At least the reinforcing portion is fixed by applying a tape winding to the reinforcing portion (claim 3). According to the above-described configuration, the portion where the corrugated tube is contracted to serve as the reinforcing portion is protected with the same thickness as the second peripheral wall by densely overlapping the first peripheral wall and the second peripheral wall. The same strength can be exhibited, so that the interference region with other members can be selectively reinforced, and the setting and formation of the reinforced region can be easily performed. The reinforcing portion formed by shrinking the corrugated tube can be easily fixed by winding the tape.

According to a fourth aspect of the present invention, there is provided a method for assembling a wire harness for covering a corrugated tube with a wire bundle by inserting a wire bundle of a plurality of electric wires with terminals into the corrugated tube. A large number of formed grooves are constituted by two peripheral walls having different widths, and each groove is connected so that a narrow second peripheral wall is connected to a wide first peripheral wall of an adjacent groove. When the tube is contracted, the second peripheral wall is fitted into the first peripheral wall and polymerized to maintain the superimposed state. From one end to the other end,
Next, the present invention provides a method for assembling a wire harness covered with a corrugated tube, wherein the corrugated tube is extended to a required length.

According to the above-mentioned method, when the bundle of electric wires is inserted into the corrugated tube, the corrugated tube can be maintained in a contracted state. Can be easily performed.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment, in which a wire bundle W of a terminal-attached electric wire in which a terminal 2 is crimped is inserted from the end of a corrugated tube 11 made of synthetic resin such as polypropylene or nylon, and a required wire harness W / H is formed. Make up. As shown in FIG. 2 (A), the corrugated tube 11 has a large number of grooves 11a formed on the outer circumference, a wide first peripheral wall 11b having a different width, and a narrow second peripheral wall 1b.
1c, each groove 11a is continuously connected in a bellows-like manner, with the second peripheral wall 11c being sequentially connected to the first peripheral wall 11b of the adjacent groove 11a.

The corrugated tube 11 is shown in FIG.
As shown in (B), when contracted in the length direction, the narrow second peripheral wall 11c is fitted into the wide first peripheral wall 11b to be in a state where they are superimposed on each other, and the superimposition occurs. It can be maintained stably in the state. This contracted state is
The corrugated tube 11 is maintained as long as no force is applied to the corrugated tube 11, and its contraction rate is about 50%.

Next, a method of assembling a wire harness using the above corrugated tube will be described. As shown in FIG. 3A, the corrugated tube 11 is contracted, and then the terminal-equipped wire is crimped with the terminal 2 to the terminal. The wire bundle W is inserted from one end of the corrugated tube 11 to the other end. After the completion of the insertion of the wire bundle W, the sheathing of the corrugated tube 11 to the wire bundle W is completed by extending the corrugated tube 11 by a required dimension in the length direction as shown in FIG. In this case, since the corrugated tube 11 can maintain the contracted state during the insertion operation, the insertion dimension of the wire bundle W is only about half, and in the contracted state, the first peripheral wall 1
Since the 1b and the second peripheral wall 11c are densely overlapped with each other, the unevenness on the inner circumference is in a relatively smooth state, and the terminal 2 is hardly caught by the unevenness on the inner circumferential surface. Can be easily performed.

FIG. 4 shows a second embodiment, in which a corrugated tube 11 sheathed in a wire bundle W is connected to a wire harness W.
/ H is bent at a location where the second peripheral wall 11c is bent at a location where the second peripheral wall 11c is formed on the inner peripheral side of the bent portion 11d.
Are sequentially fitted to the peripheral wall 11b to maintain the superposed state. Then, the tape T is wound around the bent portion 11d to fix the bent form, and by performing such an operation at a key point, the wire harness W / three-dimensionally bent corresponding to the actual wiring form. H.

FIG. 5 shows a third embodiment in which a reinforcing portion 11e is formed in a region where the wire harness W / H is arranged and interferes with other members.
In the required area, the corrugated tube 11 is contracted in the length direction, so that the second peripheral wall 11c is fitted into the first peripheral wall 11b to maintain the superposed state. Then, a tape T is wound around the reinforcing portion 11e and fixed. In the present embodiment, the reinforcing portion 11e is formed such that the first peripheral wall 11b and the second peripheral wall 11c are densely overlapped with each other.
The same strength as that protected by the wall thickness equivalent to that of the peripheral wall 11c is exhibited, and damage and deformation of the corrugated tube 11 can be prevented.

[0017]

As is clear from the above description, according to the structure and the assembling method of the wire harness covered with the corrugated tube according to the present invention, the wire bundle can be inserted while the corrugated tube is contracted. Also, the insertion operation of the wire bundle can be easily performed even in a long wire harness. Moreover, in the contracted state of the corrugated tube, the unevenness of the inner circumference is superimposed and smoothed, so that the terminal crimped to the end of the wire bundle can be smoothly inserted, and the workability of the insertion operation can be improved. .

Further, the bending state can be maintained and fixed in accordance with the bending form of the wire harness, and the area of interference with other members can be contracted to reinforce, so that the corrugated tube can also function as a protector.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a first embodiment.

FIG. 2A is a front view showing an expanded state of a corrugated tube, and FIG. 2B is a partially cutaway front view in a contracted state.

FIGS. 3A and 3B are diagrams illustrating a process of inserting a wire bundle into a corrugated tube.

FIG. 4 is a front view of the second embodiment.

FIG. 5 is a front view of a third embodiment.

6A and 6B show a conventional example, wherein FIG. 6A is a perspective view of a corrugated tube with a split groove, and FIG. 6B is a perspective view of a corrugated tube without a split groove.

FIG. 7 is a view showing a process of attaching to a wire bundle using a conventional split grooved corrugated tube.

FIG. 8 is a view showing a step of inserting a wire bundle using a conventional split grooveless corrugated tube.

[Explanation of symbols]

 W / H wire harness W wire bundle 11 corrugated tube 11a groove 11b first peripheral wall 11c second peripheral wall 11d bent portion 11e reinforcing portion

Claims (4)

[Claims] 1. A wire harness structure in which a corrugated tube is sheathed on a wire bundle of a plurality of electric wires with terminals, wherein the corrugated tube has a large number of grooves formed on the outer periphery formed by two peripheral walls having different widths. Each groove is connected to a wide first peripheral wall of an adjacent groove so that a narrow second peripheral wall is connected to the first peripheral wall. When the corrugated tube is contracted, the second peripheral wall is connected to the first peripheral wall. A wire harness covered with a corrugated tube, wherein the wire harness is structured so as to be fitted into and polymerized to maintain the polymerized state. 2. A corrugated tube sheathed on the electric wire bundle is bent at a bent portion corresponding to a wiring harness configuration so that the second peripheral wall can be fitted into the first peripheral wall to maintain a superposed state. The structure of a wire harness covered with a corrugated tube according to claim 1, wherein the bent portion is formed by bending, and the bent shape is fixed by applying a tape winding to at least the bent portion. 3. In the corrugated tube sheathed on the wire bundle, the second peripheral wall is fitted into the first peripheral wall in a region where the wiring harness is arranged and interferes with other members, and the overlapping state is maintained. The wire harness sheathed with a corrugated tube according to claim 1 or 2, wherein the reinforcing portion is formed by shrinking so as to obtain the reinforcing portion, and the reinforcing portion is fixed by applying a tape winding to at least the reinforcing portion. Construction. 4. A method of assembling a wire harness for covering a corrugated tube with a wire bundle by inserting a wire bundle of a plurality of electric wires with terminals into the corrugated tube, wherein the corrugated tube includes a plurality of corrugated tubes formed on an outer periphery thereof. The groove is composed of two peripheral walls having different widths, and each groove is connected such that the narrow second peripheral wall is connected to the wide first peripheral wall of the adjacent groove, and the corrugated tube is contracted. When the second peripheral wall is inserted into the first peripheral wall and superimposed, the superimposed state is maintained, and the electric wire bundle is moved from one end to the other end of the corrugated tube in a state where the corrugated tube is contracted. A method of assembling a wire harness covered with a corrugated tube, the corrugated tube being stretched to a required length.