JPH11339567A - Automotive wiring harness - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To enable a vehicle-mounted wire harness to be easily removed manually when dismantling a vehicle. SOLUTION: A wire harness 200 is formed by bundling a plurality of wire bundles 201 to 209 each having a connector 220 fixed at one end so that the lengths and locations of branch portions near the connectors are different from each other. When a predetermined portion (for example, point C) is lifted and tensile stress is applied, the tensile stress is concentrated one by one from the connector near the point C and the branch portion of the wire bundle connected to the connector, and the wire harness is broken while the connector 220 is broken. 2
Remove 00.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an easily detachable vehicle-mounted wire harness (hereinafter simply referred to as a wire harness).

[0002]

2. Description of the Related Art In recent years, it has become an important issue to improve the recycling rate of materials of end-of-life vehicles and to reduce the time required for dismantling. In particular, copper, which is a main material of the electric wire portion of the wire harness, when mixed with an iron-based material causes iron to become brittle. In addition, lead compounds and PVC, which are components of insulators of electric wires,
Incineration of (vinyl chloride) produces harmful substances. Therefore, it is necessary to remove the wire harness together with the resin parts and the like at the time of dismantling the vehicle and dispose it separately.

A conventional wire harness will be described with reference to FIGS. FIG. 6 is a view showing a state in which a conventional wire harness is mounted on an engine part of a vehicle, and FIG.
FIG. 8 is a diagram showing a single wire harness, and FIG. 8 is a diagram showing a connector portion provided at the tip of each wire bundle of a conventional wire harness. Here, a bundle of a plurality of electric wires is referred to as an electric wire bundle, and a bundle of a plurality of electric wires is referred to as a wire harness.

[0006] As is apparent from FIGS. 6 and 7, in the conventional wire harness 100, the wire bundles 101 to 104 or 105 to 109 with a plurality of connectors 121 to 129 branch from substantially the same location A or B, respectively. Is configured. An attachment member (clip) 110 for engaging and fixing to a part of the vehicle is provided at an intermediate portion of the wire harness 100. The conventional wire harness 100 has been designed to have a minimum length without slack in order to reduce costs and reduce the space occupied by the wire harness 100 as much as possible.

[0005] In the connector portions 121 to 129 shown in FIG.
Terminals (not shown because they are well known) are fixed to the housing 140. Each of the electric wires 131 to 135 is arranged to have substantially the same length. Further, the housing 140 is provided with a lock portion 141 for preventing accidental disconnection when the housing 140 is connected to a vehicle-side connector (not shown).

Although not shown, one end of the wire harness 100 may be a ground terminal.
Usually, it is fixed to the vehicle side with bolts or nuts.

[0007] By the way, in order to prevent accidental disconnection of the connector when one of the ends of the wire harness 100 is a ground terminal, a car manufacturer and a connector 121 to 1 on the wire harness 100 side have to prevent accidental disconnection.
29, the lock breaking strength of the lock portion 141 and the electric wires 13
The terminals fixed to 1 to 135 are housings 14 made of resin.
The lower limits of the lance breaking strength and the breaking strength of each electric wire 131 so as not to fall out from 0 are determined. Accordingly, wire harness suppliers have also made efforts to increase the lock breaking strength and the lance breaking strength as much as possible.

[0008]

However, when an automobile is scrapped and dismantled for recycling, the wire harness 100 hinders dismantling work. For example, in FIG. 6, when the predetermined portion C of the wire harness 100 is pulled up to break each of the connectors 121 to 129 and disconnect the connection, first, the five wire bundles 105 to 109 branched from the point B first. The power is dispersed to Assuming that the lock breaking strength or the lance breaking strength of the connectors 125 to 129 provided at the tips of the wire bundles 105 to 109 are the same, the force required to break any one of the connectors 125 to 129 is reduced. Five times the force must be applied to the wire harness 100.

However, as described above, each connector 121
129 are designed to have a very high lock breaking strength so that they do not come off easily. for that reason,
Each wire bundle 101 to 10 of the conventional wire harness 100
It is very difficult to manually break the connectors 121 to 129 provided at the front end of the connector 9. Even if one of the connectors 121 to 129 can be destroyed by human power, the plurality of connectors 125 to 129 must be destroyed almost simultaneously as described above. It is practically impossible to remove the wire harness 100 by pulling the wire harness 100 with human power to break the connectors 121 to 129.

Similarly, since the lance breaking strength is designed to be very high, even if a force is applied to each of the wire bundles 101 to 109, as shown in FIG. Electric wires 131 to 135 constituting
The lance between the terminal fixed to the tip of each of the electric wires 131 to 135 and the housing 140 is broken, so that each of the electric wires 131 to 135 is
A very large force is required to pull out or break each wire.

Therefore, conventionally, when dismantling a scrapped vehicle, the wire harness 100 is removed using a machine, or the waste material including the wire harness 100 is finely crushed and landfilled without removing the wire harness 100. Had been done.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and has as its object to provide a vehicle-mounted wire harness that can be easily removed.

[0013]

In order to achieve the above object, a vehicle-mounted wire harness according to the present invention is configured by bundling a plurality of wire bundles each having a connector fixed to a distal end portion, and each wire bundle is located at a different position. By branching and pulling a predetermined portion in a predetermined direction in a state of being mounted on a vehicle, a tensile stress acts on only one of the connectors and a branch portion of the wire bundle connected thereto, and the other connector and the other wire bundles The branch position of each wire bundle and the length of the branch portion are set so that no tensile stress acts on the branch portion. With such a configuration, since the pulling force applied to the wire harness always acts only on any one of the connectors and the branch portion of the wire bundle connected thereto, by continuing to pull the wire harness with a force that can destroy one connector. All the connectors can be sequentially destroyed, and finally the wire harness can be removed from the vehicle by human power.

Further, the vehicle has a fixing portion for fixing to a part of the vehicle. When a tensile stress acts on any of the connectors and the branch portion of the wire bundle adjacent to the fixing portion, the fixing portion has a tensile stress. Does not act, and when a tensile stress is acting on the fixing portion, the position of the fixing portion may be set so that the tensile stress does not act on the other connector and the branch portion of the wire bundle. . With such a configuration, even if the wire harness is fixed to a part of the vehicle, it can be removed by human power in the same manner as described above.

The length of at least a part of the branch portion of each wire bundle is different from the length of the other branch portions, and the branch portions other than the branch portion on which the tensile stress is acting are slack. It may be configured as follows. With such a configuration, it is possible to realize a vehicle-mounted wire harness that can be easily removed without taking a particularly complicated configuration.

[0016] Further, at least a portion of the wire may be different from the length of the other wires between the connector and the wire bundle binding portion at the distal end of the wire harness having one connector. . With such a configuration, when a tensile stress is applied to the branch portion of any of the wire bundles, the applied stress is not scattered to each wire, but is intensively applied in order from the wire bundle with a short length. .
As a result, it is possible to break each electric wire with a relatively small force, or to break a lance portion for fixing a resin housing constituting the connector and a terminal fixed to a tip end of each electric wire. .

Further, the wires constituting each wire bundle may be configured to have a breaking force within a range in which the wires are broken corresponding to a force that can be generated by a human. In other words, by satisfying the conditions required during the manufacture of the vehicle and within the range that can be manually broken when dismantling the vehicle, the wire harness can be easily removed manually without using a machine or special tools. It becomes possible. As an example, 100N to 200N
Is preferably within the range.

Alternatively, each connector is composed of a resin housing and a terminal fixed to the end of each electric wire.
The breaking strength of the lance for fixing the housing and each terminal may be configured to be equal to or more than the lower limit value of the required breaking strength and within a predetermined value corresponding to a force that can be generated by a human. .

Alternatively, each connector has a lock portion for coupling and fixing to a connector provided on the vehicle side, and the breaking strength of each lock portion is equal to or higher than the required lower limit of the breaking strength, and human beings may be generated. You may comprise so that it may be in the range up to the predetermined value corresponding to a force.

Further, the fixing portion is a substantially U-shaped terminal fixed to the vehicle using a bolt or a nut, and a force corresponding to a force that can be generated by a human when the bolt or the nut is tightened. It may be configured to be able to be pulled out. With such a configuration, the terminal of the wire harness can be removed without completely removing the bolt or the nut. Also, this terminal can be used as a ground.

The width of the opening of the substantially U-shaped terminal is smaller than the diameter of the shaft of the bolt, and a tongue piece bent in a direction substantially parallel to the axis of the bolt at a portion to be fitted to the shaft of the bolt. You may comprise so that a projection may be formed. With such a configuration, it is possible to increase the fixing strength when the terminals are fixed by bolts or nuts.

Alternatively, the fixing portion is a mounting member to be engaged and fixed to a part on the vehicle side, the breaking strength of the mounting member being equal to or more than the lower limit of the required breaking strength, and human being generated. The configuration may be such that it is within a range up to a predetermined value corresponding to the obtained force. Even with such a configuration, the attachment member can be manually broken, and the wire harness can be easily removed without using a machine or a special tool.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle-mounted wire harness according to the present invention will be described with reference to FIGS. FIG. 1 is a view showing a state in which a wire harness of the present embodiment is mounted on an engine part of a vehicle, FIG. 2 is a view showing a single wire harness of the present embodiment, and FIG. 3 is a view of each wire bundle of the wire harness of the present embodiment. It is a figure showing the connector part provided in the tip.

As is clear from FIGS. 1 and 2, the wire harness 200 of the present embodiment
The wire bundles 201 to 209 with 29 are bundled so as to branch off from different positions. Each connector 221-2 branches from the main body of the wire harness 200.
The length of the branch portion of each of the wire bundles 201 to 209 up to 29 does not necessarily have to be uniform. For example, a predetermined portion (for example, point C) is pulled in a predetermined direction (for example, the direction of arrow K) in a state of being mounted on the vehicle, and the tensile stress is concentrated on the connector 229 near the point C and the branch portion of the wire bundle 209 connected to the connector 229. When the other connector 22
The branch position of the wire bundle 209 and the other wire bundles 201 to 209 and the length of the branch portion are set so that tensile stress does not act on the branch portions of the wire bundles 201 to 228 and the wire bundles 201 to 208. Hereinafter, the wire bundle 208 and the other wire bundles 201 to 201
207, wire bundle 207 and other wire bundles 201 to 206
... the same applies to the relationship between the wire bundle 202 and the wire bundle 201.

In the middle part of the wire harness 200,
An attachment member (clip) 210 for engaging and fixing to a part of the vehicle is provided. Similarly, when a tensile stress is acting on the connector 225 adjacent to the mounting member 210 and the branch portion of the wire bundle 205, no tensile stress is acting on the mounting member 210, and the mounting member 210 When a tensile stress is applied, the other connectors 221 to 224
The position and length of the mounting member 210 are set so that no tensile stress acts on the branch portions of the wire bundles 201 to 204.

With this configuration, the pulling force applied to the wire harness 200 is always applied to any one of the connectors 221 to 229 and the wire bundle 201 to them.
209 only act on the branch or mounting member 210. Here, if the wire harness 200 is continuously pulled with a force sufficient to break one of the connectors 221 to 229, all the connectors 221 to 229 can be broken in order, and the wire harness 200 is finally removed from the vehicle. It becomes possible. The mounting member 210
In order to facilitate the breakage of the mounting member 210, a part of the attachment member 210 may be made thinner or thinner, and the stress may be concentrated on the part.

Next, FIG. 3 shows the details of the fixed portions of the connectors 221 to 229 and the wire bundles 201 to 209. Each of the wire bundles 201 to 209 has a plurality of wires 231 to 23, respectively.
5 are bundled, and the outside thereof is wound around with a tape or the like and bound. As an example, in FIG. 3, each wire bundle 201 to 209 is configured by a plurality of types of wires 231 to 235 having different thicknesses. However, the present invention is not limited to this configuration, and electric wires having the same thickness may be bundled.
The thickness and the number of electric wires may be different for every 209.

In the example shown in FIG.
9 and the binding portion of each of the wire bundles 201 to 209, the length of the thickest wire 231 is the shortest, then the length of the thick wire 232 is the second shortest, and the three thinnest wires 233 The length of the 235 is the longest and almost the same.
In such a configuration, it is assumed that a tensile stress is applied to any of the wire bundles 201 to 209 (for example, the wire bundle 209) in the direction of arrow L. Here, connector 2
The lock breaking strength of the lock portion 241 of each housing 240 of the housings 21 to 229 is high, and the lock is not broken by the applied tensile stress, and the connector on the vehicle side and each connector 22 are not broken.
The housings 240 of 1 to 229 are not separated.

The tensile stress is initially set to the shortest wire 23
Focus only on one. When the tensile stress is larger than the breaking strength of the electric wire 231 or when the breaking strength of the lance for fixing the resin housing 240 to the terminal fixed to the end of the electric wire 231 is larger than the breaking strength, the electric wire 231 separates from the housing 240. , Then the short wire 232 is stretched. When the tensile stress is continuously applied to the wire bundle 209, the wires 232 to 235 separate from the housing 240 in the same manner. Finally, all the electric wires 231 to 23
5 moves away from the housing 240, the wire bundle 209
No longer receives tensile stress, and the next wire bundle 208
The tensile stress concentrates only on By repeating the same mechanism, the wires 231 to 235 of all the wire bundles 201 to 209 are separated from the housings 240 of the connectors 221 to 229, and the wire harness 200 is removed from the vehicle.

Here, the breaking strength of each electric wire will be examined. Assuming that the cross-sectional area of the thickest wire 231 is 0.7 mm ² , the breaking strength of this wire is 200 N / piece. Also,
Assuming that the cross-sectional area of the second thickest wire 232 is 0.5 mm ² , the breaking strength of the wire is 140 N / piece. Similarly, the cross-sectional area of the thinnest electric wires 233 to 235 is 0.14 m
Assuming m ² , the breaking strength of the wire is 40 N / wire. Therefore, when the length of each wire is the same as in the conventional example shown in FIG. 8, unless the lock breakage or the lance breakage occurs in the connectors 221 to 229, each wire 231 to 460N is not applied unless a tensile stress of 460 N or more is applied. 235 cannot be broken. On the other hand, in the configuration of the present embodiment, since the tensile stress is sequentially applied to each of the electric wires 231 to 235, the electric wires 231 to 235 can be sequentially broken with a force of 200 N or more. 20
A force of about 0N is a value that can be generated by a normal human hand.
0 can be removed manually.

The type of the electric wire is not limited to this, and a thick wire having a sectional area of, for example, 2 mm ² may be used. The breaking strength of this wire is as high as 460 N, and it is impossible to break it by human power. In that case, the connectors 221 to 221
In this case, the breaking strength of the lance for fixing the resin housing 229 to the terminal fixed to the end of each electric wire is set to, for example, about 100 to 200 N. If it is less than 200N, it can be destroyed by human power. Also, 10
If it is 0 N or less, the lower limit of the lance breaking strength required by the automobile manufacturer may not be satisfied. Therefore, the above-mentioned about 100 to 200 N is preferable.

As another example of the terminal of the bundle of wires branched from the wire harness 200, for example, a ground terminal is shown in FIG. Generally, the ground terminal is fixed to the vehicle side with bolts or nuts. As shown in FIG. 4, the terminal 300 of the present embodiment is substantially U-shaped, and the width D1 of the opening of the notch 301 is larger than the width D2 of the portion fitted with the bolt shaft (not shown). Is also narrowed. A tongue-shaped projection 302 bent in a direction substantially parallel to the axis of the bolt (the direction of arrow M) is provided around the notch 301. Further, the vicinity 303 of the opening of the notch 301 of the terminal 300 is tapered so that the thickness of the material is reduced.

When the terminal 300 is fixed to the vehicle side, the width of the opening of the notch 301 is smaller than the diameter of the bolt shaft, so that the bolt shaft and the terminal 300 are cut with the bolt or nut completely removed. The notch 301 must be fitted. However, due to this configuration, the terminal 3
When fixing 00 to the vehicle side, it is possible to prevent the terminal 300 from being accidentally detached.

When the terminal 300 is fixed to the vehicle by bolts or nuts, the tongue-shaped projection 302 is tightened in the direction of arrow M by the head or nut of the bolt. In this state, when a pulling force in the direction of arrow N acts on the wire bundles 201 to 209, the tongue-shaped protrusion 302 is deformed, and the terminal 300 moves in the direction of arrow N. At this time, the portion 303 in the vicinity of the opening, which is processed so as to have a small thickness, is deformed by receiving the stress of the bolt axis, and the width D1 of the opening is changed to the width D of the bolt axis.
2 and the terminal 300 is separated from the vehicle side. With such a configuration, the terminal 300 can be removed without loosening the bolt or the nut. In consideration of the lower limit of the pull-out strength of the terminal 300 required by an automobile manufacturer and the force that can be generated by a human, the tongue-shaped protrusion 302 and the vicinity of the opening 303 are deformed by a force of about 100 to 200 N. It is preferable to determine the thickness of the terminal 300, the shape of the tongue-shaped protrusion 302, and the like.

FIG. 5 shows a connector portion provided at the tip of each wire bundle of a wire harness according to another embodiment. In the embodiment shown in FIG. 5, the connectors 221 to 229 and the respective wire bundles 201 to 20 are similar to the conventional example shown in FIG.
Each of the electric wires 231 to 235 at a portion where the jacket such as the tape between the binding portion 9 and the binding portion 9 is peeled off has substantially the same length. Therefore, when a tensile stress in the direction of the arrow L acts on the wire bundles 201 to 209, the tensile stress is reduced to the respective wires 231.
Since the wires 231 to 235 are dispersed, the electric wires 231 to 235 are not broken, and the lances for fixing the resin housing 240 and the terminals fixed to the tips of the electric wires 231 to 235 are not broken.

However, as is apparent from a comparison between FIGS. 5 and 8, the vehicle-side connector (not shown) and the connector 2 are not shown.
The width of the lock portion 242 for coupling and fixing the lock portions 21 to 229 is reduced. With such a configuration, the electric wire bundle 20
When a tensile stress is applied to the connector 1 to 209, the connector 2
The lock portions 242 of the connectors 21 to 229 are destroyed to
It becomes possible to remove the wire harness 200 together with 1 to 229.

Incidentally, considering the lower limit value of the lock breaking strength of the connector required by the automobile manufacturer and the force that can be generated by a human, the lock portion 242 is 100 to 200.
The width of the lock part 242,
It is preferable to determine the shape, material, and the like. FIG. 5 shows a so-called male connector, but the same applies to a female connector.

[0038]

As described above, according to the vehicle-mounted wire harness of the present invention, a plurality of wire bundles each having a connector fixed to the distal end are bundled, and each wire bundle is branched from a different position. By pulling a predetermined location in a predetermined direction in a state of being mounted on a vehicle, a tensile stress acts only on one of the connectors and the branch portion of the wire bundle connected thereto, and the other connector and the branch portion of the other wire bundle are applied. Since the branch position and the length of the branch portion of each wire bundle are set so that tensile stress does not act, the pulling force applied to the wire harness always applies to any one connector and the branch portion of the wire bundle connected to it. By pulling the wire harness with a force that can destroy one connector, all connectors can be destroyed in order. That. As a result, the wire harness can be removed from the vehicle with a relatively small force that can be generated by a human.

Further, even when a fixing portion for fixing to a part of the vehicle is provided, the fixing portion may be connected to any one of the connectors adjacent to the fixing portion and the branch of the wire bundle in the same manner as the branch portion of the wire bundle. When tensile stress is applied to the part, no tensile stress is applied to the fixed part, and when tensile stress is applied to the fixed part, no tensile stress is applied to the other connector and branch part of the wire bundle. By setting a proper position, it is possible to remove the same with human power.

Further, among the branch portions of each wire bundle, the length of at least some of the branch portions is made different from the length of the other branch portions, and the branch portions other than the branch portions on which the tensile stress is acting are loosened. Thereby, it becomes possible to easily remove it without taking a particularly complicated configuration.

In addition, at least a part of the electric wire is made different from the other electric wires between the electric wire bundle bundling portion at the front end portion of the electric wire harness having one connector and the connector. When a tensile stress is applied to the branch portion of the wire bundle, the applied stress is not scattered to each wire, but is applied intensively in order from the short wire bundle, and each wire is applied with relatively small force. Break,
Alternatively, it is possible to break a lance portion for fixing the resin housing constituting the connector and the terminal fixed to the tip of each electric wire.

Further, by making the electric wires constituting each electric wire bundle have a breaking force within a range in which the electric wires can be broken in accordance with a force that can be generated by a human, a manual operation can be performed without using a machine or a special tool. And the wire harness can be easily removed. Alternatively, each connector is composed of a resin housing and a terminal fixed to the end of each wire,
The same applies when the breaking strength of the lance for fixing the housing and each terminal is not less than the lower limit value of the required breaking strength and within a range up to a predetermined value corresponding to a force that can be generated by a human. Alternatively, each connector is provided with a lock portion for coupling and fixing with the connector provided on the vehicle side, and the breaking strength of each lock portion is equal to or more than the lower limit value of the required breaking strength and corresponds to a force that can be generated by a human. The same applies to a range up to a predetermined value.

Further, the fixing portion is a substantially U-shaped terminal which is fixed to the vehicle side by using a bolt or a nut, and the bolt or the nut can be pulled out with a force corresponding to a force that can be generated by a human when the bolt or the nut is tightened. By doing so, the terminals of the wire harness can be removed without completely removing the bolts or nuts. Also, this terminal can be used as a ground. Further, the width of the opening of the substantially U-shaped terminal is made smaller than the diameter of the shaft of the bolt, and the tongue-shaped protrusion bent in a direction substantially parallel to the axis of the bolt at a portion fitted with the shaft of the bolt. Is formed, it is possible to increase the fixing strength when the terminal is fixed by a bolt or a nut.

Alternatively, the fixing portion is a mounting member for engaging and fixing to a part on the vehicle side, and the breaking strength of the mounting member is equal to or more than the lower limit of the required breaking strength and corresponds to a force that can be generated by a human. The mounting member can be manually destroyed by setting it within the range of the predetermined value,
The wire harness can be easily removed.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state where a wire harness according to an embodiment of the present invention is mounted on an engine portion of a vehicle.

FIG. 2 is a diagram showing a single wire harness of the embodiment.

FIG. 3 is a view showing a connector portion provided at a tip of each wire bundle of the wire harness of the embodiment.

FIG. 4 is a diagram showing another example of the terminal of the wire bundle branched from the wire harness.

FIG. 5 is a view showing a connector portion provided at a tip of each wire bundle of a wire harness of another embodiment.

FIG. 6 is a diagram showing a state in which a conventional wire harness is mounted on an engine portion of a vehicle.

FIG. 7 is a diagram showing a conventional wire harness alone.

FIG. 8 is a view showing a connector portion provided at the tip of each wire bundle of a conventional wire harness.

[Explanation of symbols]

 200: Wire harness 201-209: Wire bundle 210: Mounting member 221-229: Connector 231-235: Electric wire 240: Housing 241: Lock portion 242: Lock portion 300: Terminal 301: Notch 302: Tongue-shaped protrusion 303: Near the opening

Claims (10)

[Claims] An electric wire bundle is formed by bundling a plurality of electric wire bundles each having a connector fixed to a tip end thereof. Each of the electric wire bundles branches from a different position, and is pulled in a predetermined direction in a state where the electric wire bundle is mounted on a vehicle. The tensile position acts on only one of the connectors and the branch portion of the wire bundle connected thereto, and the branch position and the branch position of each wire bundle so that the tensile stress does not act on the other connector and the branch portion of the other wire bundle. An in-vehicle wire harness, wherein a length of a branch portion is set. 2. A fixing portion for fixing to a part of a vehicle, wherein a tensile stress is applied to the fixing portion when a tensile stress is acting on any of the connectors and the branch portion of the wire bundle adjacent to the fixing portion. The position of the fixing portion is set so that no tensile stress acts on the other connector and the branch portion of the wire bundle when a tensile stress is acting on the fixing portion without acting on the fixing portion. The vehicle-mounted wire harness according to 1. 3. The length of at least a part of the branch portion of each wire bundle is different from the length of the other branch portion, and the branch portions other than the branch portion on which the tensile stress is applied are slackened. The vehicle-mounted wire harness according to claim 1 or 2, wherein: 4. The cable according to claim 1, wherein the length of at least some of the wires is different from the length of the other wires between the wire bundle bundling portion at the tip of the wire harness having one connector and the connector. 4. The in-vehicle wire harness according to any one of claims 1 to 3. 5. The in-vehicle wire harness according to claim 4, wherein the electric wires constituting each of the electric wire bundles have a breaking force within a range where the electric wires are broken corresponding to a force that can be generated by a human. 6. Each connector is composed of a resin housing and a terminal fixed to the tip of each electric wire, and the breaking strength of the lance for fixing the housing and each terminal is the lower limit of the required breaking strength. The vehicle-mounted wire harness according to any one of claims 1 to 3, wherein the wire harness is within a range up to a predetermined value corresponding to a force that can be generated by a human. 7. Each connector has a lock portion for coupling and fixing to a connector provided on the vehicle side, and the breaking strength of each lock portion is equal to or higher than the required lower limit of the breaking strength and human beings can be generated. The in-vehicle wire harness according to any one of claims 1 to 3, wherein the value is within a range up to a predetermined value corresponding to the force. 8. The fixing portion is a substantially U-shaped terminal fixed to the vehicle using a bolt or a nut, and is capable of being pulled out by a force that a human can generate when the bolt or the nut is tightened. The vehicle-mounted wire harness according to claim 2, wherein: 9. A width of an opening portion of the substantially U-shaped terminal is smaller than a diameter of a shaft portion of the bolt, and a tongue piece bent at a portion fitted with the shaft portion of the bolt in a direction substantially parallel to the axis of the bolt. The vehicle-mounted wire harness according to claim 8, wherein a projection is formed. 10. A fixing member for engaging and fixing to a part on the vehicle side, wherein the fixing member has a breaking strength equal to or higher than a lower limit value of the required breaking strength and a human being generates. The in-vehicle wire harness according to claim 2, wherein the value is within a range up to a predetermined value corresponding to the force to be obtained.