JP2003235124A - Protecting method for wire connected with connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To completely protect a wire up to the root of a connector with a covering material. <P>SOLUTION: In a case of protecting the wire (w) of a wiring harness W/H cabled in an automobile in the vicinity of a root of the connector 16: a plurality of slits 11 are formed in a round tube shaped corrugated tube 10 from one end of the connector 16 side; one end of the slit side of the corrugated tube 10 is made to abut on a housing end face 17 of a terminal insertion side of the connector; the slits 11 are fitted with a binding band 18 thereon in this abutting state; and the corrugated tube 10 is thereby reduced in diameter due to closures of the slits 11, thus fastening and fixing the corrugated tube 10 to the wire (w) at the root of the connector. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire protection structure for a connector connecting portion (connector root portion), and more particularly, a wire is covered with a corrugated tube, and the corrugated tube is abutted against the connector to prevent the electric wire from being exposed to the outside. In such a case, even if the electric wire is bent near the connector, the corrugated tube is kept in contact with the connector to protect the electric wire.

[0002]

2. Description of the Related Art Conventionally, a corrugated tube is externally provided to protect a wire harness routed to an automobile, and a corrugated tube 1'is installed as shown in FIG. The slit S is continuously provided in the axial direction, the slit 1'is opened, and the electric wire W'is covered from the side. It is necessary to securely protect the electric wire W for an airbag circuit or the like. Therefore, the corrugated tube 1 having a substantially round tubular shape without a slit shown in FIG. 8B is used to prevent the electric wire W from being exposed to the outside. There is. Further, as shown in FIG. 8C, the tip 1a of the corrugated tube 1 is connected to the connector 2 so that the electric wire W is not exposed even at the connecting portion between the electric wire W and the connector 2, that is, the so-called connector root portion.
It abuts the housing end surface on the terminal insertion side of. The other end 1b of the corrugated tube 1 is fixed by winding the other end 1b around the electric wire W with an adhesive tape 3, or by tape winding connection with a vinyl chloride tube which is sheathed on the electric wire, and is abutted against a connector on the other end side of the electric wire. .

[0003]

As described above, even when the tip of the corrugated tube 1 is abutted against the connector 2, the electric wire W has to be bent and wired from the vicinity of the connection portion with the connector 2. As shown in FIG. 9, the corrugated tube 1 fixed to the electric wire W with the adhesive tape 3 on the bending side of the other end follows the bending of the electric wire W and the connector 2
The part that has been abutted against is separated from the connector 2, and the electric wire W is exposed to the outside at the base of the connector. In the case of the electric wire of the air bag circuit, it is required that the electric wire is not exposed to the outside over the entire length of the electric wire, so that the electric wire is exposed from a slight gap at the connector base portion.

To solve the above problem, the corrugated tube 1
There is a case where the adhesive tape 3 is wound around the tip of the connector 2 to the connector 2 as shown in FIG. 10 to prevent the corrugated tube 1 from coming off the connector 2. However, the adhesive force of the adhesive tape 3 may deteriorate over time or be stretched due to heat, so that the corrugated tube 1 may come off the connector 2, and the tip of the corrugated tube can be abutted against the connector. There is a problem that cannot be addressed.

The present invention has been made in view of the above problems, and even if the electric wire is bent at the base of the connector, the state in which the corrugated tube is abutted against the connector can be maintained and the electric wire is completely exposed to the outside. The challenge is to be able to prevent it.

[0006]

In order to solve the above-mentioned problems, the present invention is, firstly, to connect an end of an electric wire sheathed with a corrugated tube without slits to a connector and to connect the end face of the corrugated tube to the connector. Butt,
A structure for protecting the electric wire from being exposed to the outside, wherein the corrugated tube is provided with a plurality of slits cut in the axial direction at intervals from the connection end with the connector in the circumferential direction, and the front end surface of the corrugated tube is provided. Is abutted against the end surface of the connector on the terminal insertion side, the outer peripheral surface of the slit forming portion of the corrugated tube is fastened with a binding band, and the corrugated tube and the electric wire are fastened and fixed at the connector connecting end. We provide a wire protection structure for the connection part.

According to the above structure, when the binding band is tightened from above the slit, the split ends sandwiching the slit are brought into contact with or overlapped with each other by the binding force of the band to reduce the diameter of the corrugated tube. The electric wire inserted into the tube and the corrugated tube can be fastened and fixed at the base of the connector. As a result, even when the electric wire has to be bent near the root of the connector, the connector root portion fastened by the binding band does not bend, and the rear of the binding band position becomes the bending point. Therefore, the corrugated tube does not bend between the fastening position of the binding band and the front end position on the connector side, and the state in which the front end of the corrugated tube is abutted against the connector can be maintained. In this way, since the corrugated tube does not come off the connector at the connector root portion and the electric wire is not exposed, the electric wire can be completely protected.

Further, since the binding band is used, there is no problem of deterioration of the adhesive force unlike the adhesive tape. Further, since the corrugated tube is butted against the connector and the electric wire and the corrugated tube are fixed to each other at their roots, there is no risk of misalignment even if a force is applied during the connector mounting work. In addition, since a round tube-shaped corrugated tube that does not have a slit is used over the entire length of the side, it is possible to reliably protect the electric wire for an airbag circuit, which requires complete electric wire protection.

The slit length cut from the connector abutting end of the corrugated tube is preferably within 10 mm. This is because when a slit of 10 mm or more is provided, the corrugated tube may be bent in the middle of the slit, in which case the slit may be twisted and opened easily, and a gap may be created rather, and the binding band may be easily displaced. Due to that.

Secondly, the present invention has a structure in which an electric wire end covered with a corrugated tube without slits is connected to a connector and the tip end of the corrugated tube is abutted against the connector to protect the electric wire from being exposed to the outside. A pair of band through holes are provided in the vicinity of the connection end of the corrugated tube with the connector, and the corrugated tube is bound to the band through hole with the tip end surface of the corrugated tube abutting against the terminal insertion side end surface of the connector. The band portion of the band is passed through, and the binding band is fastened at the outer peripheral surface of the one side portion so that the electric wire in the corrugated tube is fastened to the inner peripheral surface of the one side portion by the band, and the corrugated tube is connected at the connector connecting end portion. (EN) Provided is an electric wire protection structure for a connector connecting portion that fastens and fixes an electric wire.

More specifically, one end of the band portion of the binding band is inserted into the corrugated tube through one of the pair of band through holes, and all the electric wires passing through the corrugated tube are connected to one side of the band. After biasing,
The band portion is pulled out from the other through hole, and is fastened by the fastening portion of the binding band on the outer peripheral surface of the corrugated tube on the side where the electric wires are biased.

With the above structure, the electric wires gathered on one side of the corrugated tube and the corrugated tube are integrally fastened and fixed. Therefore, similarly to the above, even when the electric wire has to be bent at the base of the connector, The connector root portion fastened by the binding band does not bend, and the rear side of the binding band position is the bending point. Therefore, the corrugated tube does not bend between the fastening position of the binding band and the front end position on the connector side, and the state in which the front end of the corrugated tube is abutted against the connector can be maintained, and complete protection is provided without exposing the electric wire. be able to.

The position of the band through hole is preferably 10 mm or more and 20 mm or less from one end of the corrugated tube on the connector side. If it is less than 10 mm, even the slight cracks generated during the work easily break the gap between the through hole and the tip. If it is larger than 20 mm, the bending point may be between the band fastening position and the connector abutting position. In that case, the tip of the corrugated tube may come off the connector and the electric wire may be exposed. Further, it is preferable that the size of the band through hole is such that the band can be passed through while observing the state of the electric wire in the corrugated tube from the outside. If the band through hole is too small, it is not possible to easily check from the outside whether all the electric wires inside are biased to one side when the band is inserted, and there is a risk that some of the electric wires will come out of the band.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In addition, in any of the following embodiments, it is applied to an electric wire w for an airbag circuit of an automobile.

FIGS. 1 to 3 show a first embodiment of the present invention, which is used as an exterior material for an electric wire w in a slitless corrugated tube 10 having a slit 11 formed at one end side. The corrugated tube 10 is shown in FIGS.
As shown in FIG. 4, four slits 11 are formed at equal intervals in the circumferential direction from one end on the connector abutting side, and the axial length L1 of the slits 11 is 10 mm. The number of slits 11 is not limited to four, and two slits 11 may be provided at opposing positions.

Next, a procedure for covering the electric wire w using the corrugated tube 10 will be described. First, as shown in FIG. 2A, the electric wire w in which the terminal 15 is connected to the terminal is connected to the terminal 1
5 is inserted into the corrugated tube 10 so as to be arranged on the slit 11 side, the terminals 15 are drawn out from the other end, and these terminals 15 are inserted and connected to the connector 16. Next, as shown in FIG. 2B, the end surface 10a of the corrugated tube 10 provided with the slit 11 is abutted against the housing surface 17 of the connector 16 on the terminal insertion side. In this state, as shown in FIG. 2 (C), the band portion 18a of the binding band 18 of the resin molded product is wound around the outer peripheral surface of the corrugated tube 10 where the slit 11 is provided, and passed through the fastening portion 18b for fastening. To do. At this time, as shown in FIG.
Due to the fastening force of the binding band 18, the corrugated tube 1
Since the slit 11 of 0 is closed and the diameter of the corrugated tube 10 in that portion is reduced, the internal electric wire w and the corrugated tube 10 are closely fixed to each other.

The corrugated tube 10 having the above-mentioned electric wires w is mounted on the end face 1 of the housing on the terminal insertion side of the connector 16.
Since it is fastened and fixed to the electric wire w by the binding band 18 at a position within 7 to 10 mm,
Even if the electric wire w has to be bent from the root side of the connector 16, the electric wire w and the corrugated tube 10 are firmly fastened together by the binding band 18 at the base of the connector 16 as shown in FIG. Position P is a binding band 18
It is on the rear side (on the side opposite to the connector connection side), and the corrugated tube 10 and the electric wire w from the rear side of the bending position P.
And are bent in the required direction. Connector 1 from bending position P
On the 6 side, the electric wire w and the corrugated tube 10 are the terminals 1
The corrugated tube 10 is held in the same linear direction as the insertion direction of the corrugated tube 5, and the tip end surface 10a of the corrugated tube 10 can be kept in contact with the housing end surface 17. Therefore, it is possible to prevent the electric wire w from being exposed at the base portion of the connector and reliably protect the electric wire.

Further, by using the binding band 18 made of a resin molded product for fixing the electric wire w and the corrugated tube 10, the binding force is reduced due to the high temperature in summer which occurs when the adhesive tape is used, and the deterioration due to long-term use is also caused. It can be resolved.
Furthermore, by binding the electric wire w and the corrugated tube 10 at the connector base position, it is possible to prevent the binding band from being displaced or coming off due to the load when the connector 16 is attached to the device.

4 to 8 show a second embodiment of the present invention. In the second embodiment, instead of providing a slit in the corrugated tube, a band through hole for a binding band is provided.

As shown in FIGS. 4A and 4B, a pair of band through holes 21 and 21 are formed in the corrugated tube 20 without slits so as to face each other in the vicinity of the tip 20a on the connector abutting side. . Specifically, the band through hole 21,
The forming position of 21 is provided at a position separated from the tip 20a by L2 (10 mm). Further, the size of the band through holes 21, 21 is set so that the inside of the corrugated tube 20 can be seen from the outside.

Next, a procedure for covering the electric wire w using the corrugated tube 20 will be described. First, as shown in FIG. 5 (A), the electric wire w having the terminal 15 connected to the terminal is passed through the corrugated tube 20, drawn out from the tip 20 a, and inserted and connected to the connector 16. Next, as shown in FIG. 5B, the housing end surface 17 on the terminal insertion side of the connector 16
In the state in which the tip 20a of the corrugated tube 20 is abutted, the band portion 18a of the binding band 18 is passed through the band through holes 21 and 21 to penetrate the inside of the corrugated tube 20, and all the electric wires w of the corrugated tube 20 are shown in FIG. (B)
As shown in FIG. 3, the band portion 18a is passed through the fastening portion 18b on the outer peripheral surface of the upper side of the corrugated tube 20 and fastened and fixed.

More specifically, as shown in FIG. 6 (A), one end of the band portion 18a is inserted into the corrugated tube 20 through one of the band through holes 21 to form the corrugated tube 20.
All the electric wires w inside are gathered on the upper surface side of the binding band 18, and
While checking this state from the band passing hole 21, the band portion 18a is pulled out from the other band passing hole 21. Next, as shown in FIG. 6 (B), the band portion 18a is passed through the fastening portion 18b and fastened on the corrugated tube 20 on the side where the electric wires w are collected.

With the above construction, as in the first embodiment, the corrugated tube 20 is fastened and fixed to the electric wire w by the binding band 18 at the base of the connector 16,
Even if the electric wire w is bent, as shown in FIG.
The bending position P is located rearward of the bundling position (opposite to the connector connecting side), and the wire w and the corrugated tube 20 are not bent between the bundling position of the band 18 and the abutting tip against the connector 16. The tip end surface 20a of the corrugated tube 20 can hold the abutting state against the connector 16.

The present invention is not limited to the above embodiment, and both the slit of the first embodiment and the band through hole of the second embodiment are provided, and the outer peripheral surface of the slit is fastened with a binding band. Alternatively, another tying band may be passed through the band-passing hole to fix the corrugated tube and the electric wire at the base of the connector using two tying bands.

[0025]

As is apparent from the above description, according to the present invention, since the corrugated tube and the electric wire are fastened and fixed by the binding band at the base of the connector, the electric wire and the corrugated tube are fastened at the fastening and fixing portion at the base of the connector. Even if you can not bend the wire to bend the wire,
The bending point is on the side opposite to the connector with respect to the binding band fastening position, and the tip of the corrugated tube can be abutted and held on the connector. Therefore, it is possible to reliably prevent the corrugated tube from coming off the connector at the base of the connector and expose the electric wire to the outside, and to protect the electric wire.

Further, the fixing at the base of the connector can prevent the fixing from being dislocated or displaced even if a force is applied to the corrugated tube and the electric wire at the time of attaching the connector to the device. In addition, since the binding band is used to fix the corrugated tube and the electric wire, and no adhesive tape is used, due to the elongation of the tape in the high temperature atmosphere that occurs when using the adhesive tape and the deterioration of the adhesive strength due to aging. There is no chance that the corrugated tube will come off the connector.

[Brief description of drawings]

FIG. 1 shows a corrugated tube according to a first embodiment of the present invention, (A) is a perspective view and (B) is a side view.

FIG. 2 is a diagram showing an electric wire exterior procedure using the corrugated tube shown in FIG. 1, in which (A), (B), and (C) are front views;
(D) is the DD sectional view taken on the line of (C).

FIG. 3 is a front view showing a state in which the corrugated tube shown in FIG. 2 is bent at the connector base.

FIG. 4 shows a corrugated tube according to a second embodiment of the present invention, in which (A) is a perspective view and (B) is a sectional view.

5 (A) and (B) are views showing an electric wire exterior procedure using the corrugated tube shown in FIG.

6A and 6B are cross-sectional views showing a method of mounting the binding band shown in FIG.

FIG. 7 is a front view showing the upper body when the corrugated tube shown in FIG. 5 is bent at the connector base.

8 (A) and 8 (B) show a conventional corrugated tube, and FIG. 8 (C) is a drawing showing a state in which an electric wire sheathed with a corrugated tube is connected to a connector.

FIG. 9 is a diagram showing a conventional problem.

FIG. 10 is a drawing showing another conventional example.

[Explanation of symbols]

w electric wire 10, 20 corrugated tube 11 slits 16 connectors 17 Housing end surface on terminal insertion side 18 unity band 21 band through hole P bending position

Claims (2)

[Claims] 1. A structure for connecting an electric wire end covered with a corrugated tube without slits to a connector and abutting a tip end surface of the corrugated tube against the connector to protect the electric wire from being exposed to the outside. The tube is provided with a plurality of slits that are cut in the axial direction at intervals from the connection end with the connector in the circumferential direction, and the corrugated tube is placed in a state where the distal end surface of the corrugated tube is abutted against the terminal insertion side end surface of the connector. An electric wire protection structure for a connector connecting part in which the outer peripheral surface of the slit forming part of the tube is fastened with a binding band to fasten and fix the corrugated tube and the electric wire at the connector connecting end. 2. A structure for connecting an electric wire end covered by a corrugated tube without slits to a connector and abutting a tip end surface of the corrugated tube against the connector to protect the electric wire from being exposed to the outside. A pair of band through holes are provided in the vicinity of the connection end of the tube with the connector, and the band portion of the binding band is inserted into the band through hole with the tip end surface of the corrugated tube abutting against the end surface of the connector on the terminal insertion side. Penetrate and fasten the binding band on the outer peripheral surface of the one side part so that the electric wire in the corrugated tube is tightened to the inner peripheral surface of the one side part by the band, and the corrugated tube and the electric wire are fastened and fixed at the connector connection end part. Wire protection structure for the connector connection part.