JP2001176340A - Method of forming car wire hardness provided with twisted electric wire and car wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To slide two extension electric wires to the position of an adjoining splice section without loosening the electric wire in the case the extension wires is splice connected to two pairs of twisted electric wires. SOLUTION: One electric wire of each pair of twisted electric wires 1, 2 is cut required dimension away from the tip to make the wire different from the other wire 1b, 2b in a length to the tip. Expansion electric wires 3a, 3b are made different from each other in length. A terminal core of the electric wire 1a, 2a with the tip cut off is then splice connected to the terminal of the longer expansion electric wire 3a. A terminal core of the electric wire 1b, 2b with the tip not connected is splice connected to a terminal of the shorter expansion electric wire 3b. With the connectors connected, the two splice positions are not coincided and are out of alignment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a wire harness for a vehicle having a twisted wire and a wire harness for a vehicle, and more particularly, to a spliced connection between two sets of twisted pair wires and two connected wires to a connector. In this case, the positions are shifted so that the two splice portions do not overlap.

[0002]

2. Description of the Related Art In recent years, twisted pair wires formed by twisting two wires at a predetermined pitch with a twisting jig have been used in order to block generation of noise due to electromagnetic waves. For example, a wire connected to a speaker mounted on an automobile needs to block noise, so a pair of wires consisting of a wire connecting a power supply and a speaker and a wire connecting a speaker and a ground are used. Twisted pair wires are used.

[0003] Furthermore, a wire harness mounted on an automobile is spliced with a total of three additional wires, one from each set of two twisted pair wires, and another additional wire from each other. There are cases where a total of three wires are spliced, that is, two splice parts are formed, and a terminal provided at the other end of the two spliced wires is inserted into the connector and connected.

For example, in a wire harness for an automobile shown in FIG. 5, a twisted pair wire 1 for a woofer and a twisted pair wire 2 for a tweeter are routed in parallel, and a twisted pair wire 1 for a woofer is formed at the distal end on the connector side. The two electric wires 1a and one electric wire 2a forming the twisted pair electric wire 2 for a tweeter are drawn out, and these two electric wires 1a, 2a and one additional electric wire 3a are spliced together to form a splice portion 4a. Similarly, another wire 1b forming the twisted pair wire 1 for the woofer and another wire 2b forming the twisted pair wire 2 for the tweeter are drawn out, and these two wires 1b, 2b are drawn out.
Is spliced with another one additional wire 3b to form a splice portion 4b, and a total of two additional wires 3b are formed.
Terminals T provided at the tips of a and 3b are connected to a connector C.

[0005]

However, since the twisted pair wires 1 for the woofer and the twisted pair wires 2 for the tweeter are formed by twisting two wires each having the same length, the twisted pair wires 1 and 2 have the same length. When splicing is performed on each of the individual wires and the added electric wires, the splice positions coincide with each other. As described above, when the splice portions 4a and 4b overlap, the wire harness is partially enlarged, and a problem that a large space is required at the splice position when the wire harness is routed occurs. In particular, because the number of vehicles is rapidly increasing,
The wiring space for the wiring harness is also limited, and it is strongly desired to avoid partial enlargement of the wiring harness. Further, there is a problem that a short circuit is likely to occur because the splice portions 4a and 4b constantly rub against each other.

In order to solve the above-mentioned problem, in order to shift the position of the splice portion, for example, as shown in FIG. In some cases, the position of the splice portion 4a formed of the electric wires 1a, 2a, 3a and the position of the splice portion 4b formed of the electric wire 3b added to the other electric wires 1b, 2b are loosened or bent.
However, according to this method, a portion where the wires 1a and 1b are slackened or bent is bulky, and a problem that the diameter of the wire harness is partially enlarged in this portion is newly generated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem. In a case where two twisted pair wires are spliced and connected to the same connector by splicing the wires, the position of the splice portion is easily and surely shifted. In addition, the problem is to solve the enlargement of the wire harness.

[0008]

In order to solve the above-mentioned problems, the present invention provides two sets of twisted-pair electric wires in which two electric wires are twisted, and a total of three electric wires, one electric wire of each set and an additional electric wire. A wire for splicing the electric wires of each pair, and similarly, for splicing a total of three electric wires of the other one electric wire and the replenishing wire, and connecting the terminal connected to the other end of the replenishing wire to the connector. In the method of forming a harness, among the twisted pair wires of each set, one wire is cut at a required distance from the tip to cut the length of the tip from the other one wire, and Splice connection between the terminal core wire of the cut end of the twisted wire and the end of the long extended wire is also made, and the tip of the twisted pair of wires is cut. Doing The splice positions of the two splices are displaced without being coincident in a state where the terminal core wire of the short wire and the terminal of the short extended wire are spliced and the terminal of the other end of each extended wire is connected to the connector. The present invention provides a method for forming a wire harness for an automobile having a twisted electric wire.

[0009] Of the twisted pair wires of each set, the two wires whose ends are cut have the same cutting dimensions, and the different lengths of the replenished wires are the same as the cutting dimensions.
Thereby, when the twisted pair electric wires are added, the electric wires are connected, and the wires are wired in parallel to the same connector, no slack or tension occurs in any of the electric wires.

[0010] As described above, two types of replenished wires are prepared, long and short, and one set of wires spliced to the long replenished wire is cut in advance to make it shorter than other sets of wires. The position of the splice part connected to the long refill wire and the position of the splice part connected to the short replenishment wire shift by themselves by the cutting dimension of the wire, and the overlapping of the two splice portions is easily and reliably performed. Can be avoided. Therefore, since it is not necessary to loosen or bend the wire as in the past in order to shorten one side, it is possible to eliminate the space consumption due to the overlap or looseness of the wire and also to avoid the overlap of the splice portion,
Space saving can be achieved by slimming down the wire harness.

Further, the present invention provides a splice in which there are two sets of twisted pair electric wires in which two electric wires are twisted, and a total of three additional electric wires which are connected to one of the electric wires of each set by a connector are spliced. There is a splice portion in which a total of three wires, each of which is a spliced portion, are connected to a connector and another terminal of each set is connected to a connector. The present invention provides an automotive wire harness characterized in that the two splice portions are displaced without being aligned, without loosening the twisted pair wires.

The automobile wire harness having the above configuration is not limited to one manufactured by the above-described method.
Including those manufactured by a method other than the above method and having a configuration in which the positions of the two splice portions are shifted without loosening the twisted pair electric wire.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method and an embodiment of the present invention will be described with reference to the drawings. 1 and 2 show the method of the present invention, and FIG. 3 shows a state in which two sets of twisted pair wires thus produced are connected to a connector.

In the present embodiment, similarly to the conventional example shown in FIG. 5, the twisted pair wires 1 for woofers and the twisted pair wires 2 for tweeters are spliced and the wires 3a and 3b are spliced and connected to the ends of the spliced wires 3a and 3b. The provided terminal T is inserted into the same connector C for connection.

The two sets of twisted pair wires 1 and 2 are formed by wires 1a and 1b and wires 2a and 2b, respectively. The wires 1a, 1b, 2a, and 2b all have the same length. Among them, the splice side (S) of the wires 1a and 2a is cut by 50 mm from the tip, and the wires 1a and 2b are cut from the wires 1b and 2b. Is also short.

Next, the wires 1a, 1b and the wires 2a, 2a
b, the tip positions are aligned on one end side of each pair, and on the other end side, the wire 1a is larger than the wire 1b and the wire 2b is smaller than the wire 2b.
The leading end position of a is retracted to the above cutting dimension 5
The wires 1a and 1b, 2
a and 2b are twisted with a twisting jig (not shown) to form the same length. In this twisted state, the front end side having different wire lengths is projected without twisting. The dimensions of the wires protruding linearly are approximately 150 mm for the wires 1a and 2a, and approximately 200 mm for the wires 1b and 2b.

The extension wire 3a is on the plus side and has a length of 200 mm. One additional wire 3b
Is a minus side, and its length is 150 mm. The difference between the lengths of the added wires 3a and 3b is
a and 2a correspond to the cutting dimensions of the electric wires. In addition, each of these added wires 3a and 3b has a length of 15 mm.
It is preferable to set the range from 0 mm to 200 mm. This is because a splice connection work allowance cannot be secured when the thickness is 150 mm or less, and noise tends to occur when the thickness is 200 mm or more.

As shown in FIG. 2, a total of three electric wires, that is, the end of the long extension wire 3a and the core wire of the splice connection end of the wires 1a and 2a, are connected using an intermediate crimp terminal 5. And the insulating tape 6 is wound around the splice portion 40a.
To form Similarly, a total of three electric wires, that is, a terminal of the short extended wire 3b and a core wire of the splice connection side terminal of the electric wires 1b and 2b, are connected by using an intermediate crimp terminal, and an insulating tape is wound around to form a splice portion 40b. I do. The splice portions 40a and 40b formed in this way are displaced in a state where the terminals T connected to the ends of the extension wires 3a and 3b are aligned.

Accordingly, the splice portions 40a and 40b are displaced with the terminal T inserted into the connector C, and the twisted pair wires 1 and 2 are bound together with other wires connected to the connector C to form a wire harness. However, the wire harness does not partially enlarge.

As described above, in the method of the present invention, only the wires 1a and 2a to be spliced to the long extension wire 3a are cut off at the splice connection end, and the wire 1b to be spliced to the short extension wire 3b, By keeping it shorter than 2b, the positions of the splice portions 40a and 40b can be shifted by the wire cutting dimension, and there is no need to shorten the wires 1a and 2a by bending or loosening them as in the conventional case. In addition, the splicing portion can be reliably displaced.

The dimensions for cutting the wires 1a, 2a are 2
Since the positions of the terminals T of the terminals of the extended wires 3a, 3b match by setting the difference between the lengths of the extended wires 3a, 3b to be equal to each other, when the terminal T is inserted into the same connector C, the twisted electric wire 1, 2 and the additional wires 3a, 3b connected to them can be routed without causing slackening or squeezing, so that the wiring harness can be prevented from being enlarged and effective use of the routing space can be achieved.

Further, the automobile wire harness formed by the above-described forming method has two splice portions 40a,
Since the positions of the splices 40b are always accurately displaced, there is no overlap or rubbing between the splice portions 40a and 40b, and the wire harness can be made slim in response to space saving, and the occurrence of a short circuit can be prevented.

The present invention is not limited to the above-described embodiment.
As shown in the figure, two sets of twisted pair wires 1 and 2 are twisted in the same length of wires 1a and 1b, 2a and 2b, and after twisting, one of the twisted pair wires 1a and 2a of each set. May be cut to the same length so that the two wire lengths of each twisted pair wire on the splice connection side are different.

[0024]

As is apparent from the above description, according to the present invention, two electric wires drawn one by one from each set of two twisted pair electric wires and two other electric wires are added to each other. When the electric wires are spliced to form a total of two splice portions, and when the terminal of the terminal of the added electric wire is inserted into the connector, the lengths of the two added electric wires are made different from each other and connected to a long additional electric wire. The two splice portions can be displaced by previously cutting and shortening the two wires to be connected, and retreating the tip positions on the splice connection side from the two wires connected to the short extension wire. In this way, the position of the splice portion can be easily and reliably shifted, and as a result, the splice portions are prevented from overlapping, the wire harness is partially enlarged, and the splice portions are rubbed against each other, thereby preventing a short circuit from occurring. it can.

Furthermore, since it is not necessary to bend or loosen the wire to shorten the length of the two splices, the efficiency and accuracy of the operation can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a method for forming a twisted pair electric wire having one end shifted by twisting the electric wires of the present invention.

FIG. 2 is an enlarged perspective view of a main part showing a splice portion between a twisted pair electric wire and a spliced electric wire.

FIG. 3 is a perspective view showing a state in which the extension wire is connected to the connector.

FIG. 4 is a perspective view showing another method of the present invention.

FIG. 5 is a perspective view showing a conventional example.

FIG. 6 is a perspective view showing another conventional example.

[Explanation of symbols]

 1, 2 twisted pair electric wire 1a, 1b, 2a, 2b electric wire 3a, 3b spliced electric wire 4a, 4b splice part 5 splice terminal 6 insulating tape T terminal C connector

Claims (2)

[Claims] 1. Two sets of twisted pair electric wires, each of which is formed by twisting two electric wires, are spliced together with a total of three electric wires, one electric wire of each set and an additional electric wire. A method for forming a wire harness in which a total of three electric wires, one electric wire and an extension wire, are spliced and a terminal connected to the other end of each of the extension wires is connected to the connector, One wire is cut at a required distance from the tip and cut so that the length of the projecting end is different from that of the other wire, and the length of the added wire is also different. Splice-connect the terminal core wire of the wire whose end has been cut and the end of the long extension wire, and connect the terminal core wire of the uncut end of the twisted wire and the end of the short extension wire of each pair of twisted pair wires. S A method of forming a wire harness for a vehicle having a twisted electric wire, wherein the two splice positions are shifted from each other in a state where the two splice positions are not coincident with each other in a state where the terminals of the other ends of the added electric wires are connected by a connector. . 2. A splice section in which a total of three electric wires, each of which is a spliced connection, including two sets of twisted pair electric wires in which two electric wires are twisted, and an additional electric wire connected to one of the electric wires of each set by a connector, There is a splice portion in which a total of three wires, the other one wire and the refill wire, are spliced, and the twisted pair wire is connected in a state where the terminals connected to the other ends of the refill wires are connected to the connector. A wire harness for an automobile, wherein the two splice portions are displaced without being aligned without being loosened.