WO2024090192A1

WO2024090192A1 - Wire harness

Info

Publication number: WO2024090192A1
Application number: PCT/JP2023/036676
Authority: WO
Inventors: 泰志望月; 重人加藤; 朋昭高野
Original assignee: 株式会社オートネットワーク技術研究所; 住友電装株式会社; 住友電気工業株式会社
Priority date: 2022-10-26
Filing date: 2023-10-10
Publication date: 2024-05-02
Also published as: JP2024063466A

Abstract

A wire harness (10) according to one embodiment of the present disclosure comprises: an electric wire bundle (30) having a plurality of electric wires (20); and an adhesive tape (40) helically wound around the outer periphery of the electric wire bundle (30). The twisting amount of the electric wire bundle (30) is such that the amount of rotation of the electric wires (20) over a length of 10 cm along the length direction of the electric wire bundle (30) is no more than two rotations.

Description

Wire Harness

This disclosure relates to wire harnesses.

Conventionally, wire harnesses arranged inside vehicles such as hybrid cars and electric cars are known that include a wire bundle having multiple electric wires and an adhesive tape that bundles the multiple electric wires (see, for example, Patent Document 1). In this type of wire harness, a tape winding device is used to wind the adhesive tape around the outer periphery of the wire bundle. In the tape winding operation using the tape winding device, a certain tension is applied to the adhesive tape while the adhesive tape is spirally wound around the outer periphery of the wire bundle. By using the tape winding device, the tape winding operation can be automated and mechanized.

Japanese Patent Application Laid-Open No. 7-304571

However, there is a demand for improved quality in the above-mentioned wire harnesses.
An object of the present disclosure is to provide a wire harness with improved quality.

The wire harness of the present disclosure comprises a wire bundle having a plurality of electric wires, and an adhesive tape spirally wound around the outer circumference of the wire bundle, and the twist amount of the wire bundle is such that the number of rotations of the electric wires per 10 cm along the longitudinal direction of the wire bundle is within 2 rotations.

The wire harness disclosed herein has the effect of improving quality.

FIG. 1 is a schematic diagram showing a wire harness according to an embodiment. FIG. 2 is a schematic side view showing the wire harness of the embodiment. FIG. 3 is a schematic perspective view illustrating an example of a wire harness according to an embodiment. FIG. 4 is a schematic perspective view illustrating an example of a wire harness according to an embodiment. FIG. 5 is a schematic plan view showing an adhesive tape according to an embodiment. FIG. 6 is a schematic plan view showing an adhesive tape according to an embodiment. FIG. 7 is a schematic vertical cross-sectional view showing an adhesive tape according to one embodiment. FIG. 8 is a schematic diagram showing a tape winding device according to an embodiment of the present invention. FIG. 9 is a schematic front view showing the main body of the tape winding device according to one embodiment. FIG. 10 is a schematic front view showing the main body of the tape winding device according to one embodiment. FIG. 11 is a schematic front view showing the main body of the tape winding device according to one embodiment. FIG. 12 is a schematic front view showing the main body of the tape winding device according to one embodiment. FIG. 13 is an explanatory diagram showing a tape winding method using the tape winding device of one embodiment. FIG. 14 is a schematic perspective view showing a wire harness when tape is wound using a conventional tape winding device. FIG. 15 is a schematic plan view showing an adhesive tape wound by a conventional tape winding device. FIG. 16 is a schematic vertical sectional view showing an adhesive tape wound by a conventional tape winding device. FIG. 17 is a schematic plan view showing an adhesive tape of a comparative example.

[Description of the embodiments of the present disclosure]
First, embodiments of the present disclosure will be listed and described.
[1] A wire harness according to the present disclosure includes an electric wire bundle having a plurality of electric wires, and an adhesive tape spirally wound around an outer periphery of the electric wire bundle, and a twist amount of the electric wires is set to be within 2 turns per 10 cm along a longitudinal direction of the electric wire bundle.

With this configuration, the twist amount of the wire bundle is within 2 turns/10 cm, which is small. This makes it possible to effectively prevent the length of the wire bundle from becoming shorter due to the twist of the wire bundle, thereby improving the quality of the wire harness.

[2] In the above [1], each of the plurality of electric wires may have a conductor cross-sectional area of ⁵ mm2 or less.
According to this configuration, even if each of the electric wires constituting the electric wire bundle is a thin electric wire that is easily twisted, the amount of twist of the electric wire bundle can be kept small, and therefore, even if each of the electric wires constituting the electric wire bundle is a thin electric wire, it is possible to suitably prevent the length of the electric wire bundle from being shortened due to the twist of the electric wire bundle.

[3] In the above [1] or [2], the electric wire bundle may be composed of two of the electric wires.
According to this configuration, even when the electric wire bundle is composed of two electric wires which are most likely to be twisted, the amount of twist in the electric wire bundle can be kept small, and therefore, even when the electric wire bundle is composed of two electric wires, it is possible to suitably prevent the length of the electric wire bundle from being shortened due to the twist in the electric wire bundle.

[4] In any of the above [1] to [3], the end surface in the longitudinal direction of the adhesive tape may be a cut surface, and the cut surface may extend linearly along a first direction intersecting the longitudinal direction of the adhesive tape.

With this configuration, the end faces of the adhesive tape in the longitudinal direction are formed into cut surfaces that extend in a straight line. This makes it possible to improve the quality of the cut surfaces compared to cut surfaces obtained when an operator cuts the adhesive tape manually.

[5] In the above [4], the cut surface may have a first end and a second end in the first direction, and the protruding length of the cut surface, which is the length between the first end and the second end along the length direction of the adhesive tape, may be 5 mm or less.

With this configuration, the protruding length of the cut surface can be kept to 5 mm or less, and unintentional stretching of the adhesive tape at the cut surface can be prevented. This improves the quality of the cut surface compared to a cut surface obtained when an operator cuts the adhesive tape manually.

[6] In any of [1] to [5] above, the adhesive tape may have a first portion having a first width and a second portion having a second width smaller than the first width, and the second width may be 0.5 times or more and less than 1 time the length of the first width.

With this configuration, the difference in tape width between the first and second parts can be kept to within 50%. This makes it possible to keep the variation in tape width in the adhesive tape to within 50%.

[7] In the above [6], the first portion may have a first thickness, the second portion may have a second thickness smaller than the first thickness, and the second thickness may be greater than or equal to 0.5 times and less than 1 time the first thickness.

With this configuration, the difference in tape thickness between the first and second parts can be kept to within 50%. This makes it possible to keep the variation in tape thickness in the adhesive tape to within 50%.

[8] In the above [6] or [7], the first portion may have a larger dimension along the length direction of the adhesive tape than the second portion.
According to this configuration, the length of the second portion having the narrower tape width can be made shorter than that of the first portion, thereby making it possible to reduce the area of the second portion having the narrower tape width in the longitudinal direction of the adhesive tape.

[9] In any of [6] to [8] above, the adhesive tape may have a plurality of the first portions and a plurality of the second portions, the first portions and the second portions being arranged alternately one by one along the length of the adhesive tape, the adhesive tape is spirally wound around the outer periphery of the electric wire bundle a plurality of times, the plurality of first portions are arranged at the same positions relative to one another in the circumferential direction of the electric wire bundle, and the plurality of second portions may be arranged at the same positions relative to one another in the circumferential direction of the electric wire bundle.

With this configuration, the adhesive tape is wound spirally around the outer periphery of the bundle of electric wires multiple times. At this time, each of the first and second parts is always provided at the same position in the circumferential direction of the bundle of electric wires. As a result, the quality of winding the adhesive tape around the outer periphery of the bundle of electric wires can be improved.

[10] In any one of the above [1] to [9], the adhesive tape may be wound in a spiral shape around the outer periphery of the electric wire bundle at a constant pitch.
According to this configuration, the adhesive tape is wound around the outer periphery of the electric wire bundle at a constant pitch. Therefore, when the adhesive tape is wound spirally so that certain portions of the adhesive tape overlap with each other in the width direction, the adhesive tape can be wound around the outer periphery of the electric wire bundle so that the overlap width of the adhesive tape is constant. This improves the quality of winding the adhesive tape around the outer periphery of the electric wire bundle.

Here, the "constant pitch" in this specification includes a case where there is no error from a standard pitch (design value), as well as a case where there is an error of about ±5 mm from the standard pitch.
[Details of the embodiment of the present disclosure]
Specific examples of the wire harness of the present disclosure will be described below with reference to the drawings. In each drawing, for convenience of explanation, some of the configurations may be exaggerated or simplified. In addition, the dimensional ratio of each part may differ in each drawing. In this specification, "parallel,""orthogonal,""fulllength," and "full circumference" include not only the cases of strictly parallel, orthogonal, the full length, and the full circumference, but also the cases of approximately parallel, orthogonal, the full length, and the full circumference within the range in which the action and effect of this embodiment is exerted. In addition, in this specification, "constant" includes the cases where there is some variation within the range in which the action and effect of this embodiment is exerted, in addition to the case where it is exactly constant. In this specification, the terms "first,""second," and the like attached to each configuration are convenient labels used to distinguish each configuration, and do not rank each configuration unless otherwise specified. Note that the present invention is not limited to these examples, but is indicated by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

(Configuration of vehicle 1)
1, a vehicle 1 has a plurality of electric devices 2, 3 and a wire harness 10 that electrically connects the plurality of electric devices 2, 3. The electric devices 2, 3 may include, for example, a battery, an inverter, a motor, an air conditioner device, a turn signal device, and an airbag device.

(Configuration of Wire Harness 10)
As shown in Fig. 2, the wire harness 10 includes an electric wire bundle 30 having a plurality of electric wires 20, and an adhesive tape 40 wound around the outer periphery of the electric wire bundle 30. The electric wire bundle 30 of this embodiment includes two electric wires 20. The electric wire bundle 30 is formed in an elongated shape. The electric wire bundle 30 is formed so as to be bent in a two-dimensional or three-dimensional shape according to, for example, the wiring path of the wire harness 10. Note that the electric wire bundle 30 may be branched, for example, midway in the length direction of the wire harness 10.

(Configuration of the electric wire 20)
Each electric wire 20 is a coated electric wire having a core wire 21 made of a conductor and an insulating coating 22 that surrounds the outer periphery of the core wire 21 and has electrical insulation properties. Each electric wire 20 is a low-voltage wire that can handle a low voltage of about 12 V, for example. Each electric wire 20 may be, for example, a non-shielded electric wire that does not have an electromagnetic shielding structure itself, or a shielded electric wire that has an electromagnetic shielding structure itself. Each electric wire 20 in this embodiment is a non-shielded electric wire.

As the core wire 21, for example, a twisted wire made by twisting together multiple metal wires or a single core wire made of a single conductor can be used. As the single core wire, for example, a columnar conductor made of a single columnar metal rod with a solid structure inside, or a tubular conductor with a hollow structure can be used. Furthermore, as the core wire 21, a combination of twisted wire, columnar conductor, and tubular conductor can be used. As the material of the core wire 21, for example, a copper-based or aluminum-based metal material can be used.

The insulating coating 22, for example, covers the entire outer circumferential surface of the core wire 21. The insulating coating 22 is made of, for example, a resin material having insulating properties.
The cross-sectional shape of each electric wire 20 cut along a plane perpendicular to the length direction of the electric wire 20, that is, the transverse cross-sectional shape of each electric wire 20, can be formed into any shape. The transverse cross-sectional shape of each electric wire 20 can be formed into, for example, a circular shape, a semicircular shape, a polygonal shape, or a flat shape. In this embodiment, the transverse cross-sectional shape of each electric wire 20 is formed into a circular shape.

Each electric wire 20 is, for example, a thin electric wire having a small conductor cross-sectional area, that is, a cross-sectional area of the core wire 21. Here, in this specification, the "thin electric wire" refers to an electric wire having a conductor cross-sectional area of 5 mm ² (so-called 5 sq) or less. As each electric wire 20, it is preferable that the conductor cross-sectional area is equal to or smaller than 0.35 mm ^2. Here, the electric wire having a conductor cross-sectional area of 0.35 mm ² is an electric wire conforming to 0.35 sq in the JIS standard, or an electric wire conforming to AWG22 in the US wire gauge standard. In addition, the electric wire having a conductor cross-sectional area of 0.35 mm ² may be an electric wire having a conductor cross-sectional area slightly larger than 0.35 mm ² , or may be an electric wire having a conductor cross-sectional area slightly smaller than 0.35 mm 2. As an electric wire having a conductor cross-sectional area smaller than 0.35 mm ² , for example, an electric wire having a smaller conductor cross- ^sectional area than 0.35 sq in the JIS standard (for example, an electric wire having a conductor cross-sectional area of 0.13 sq) can be used. As an electric wire having a conductor cross-sectional area smaller than 0.35 ^mm2 , for example, an electric wire having a smaller conductor cross-sectional area than AWG 22 in the American Wire Gauge Standard (for example, an electric wire of AWG 26) can be used. Each electric wire 20 in this embodiment has a conductor cross-sectional area of 0.13 sq.

The outer diameter of the wire bundle 30 can be, for example, about 3 mm to 30 mm. The outer diameter of the wire bundle 30 in this embodiment can be about 3 mm. In this specification, the "outer diameter of member A" refers to the outer diameter of a cross section perpendicular to the axial direction of member A, that is, the cross section of member A. Here, the cross section of member A is not limited to a perfect circle, but may be a non-circular shape such as an ellipse, an oval, or a polygon. When the cross section of member A is non-circular, the "outer diameter of member A" refers to the diameter of the circumscribing circle with the largest diameter among one or more circles circumscribing the non-circular cross section of member A. In other words, the "outer diameter of member A" in this specification refers to the longest distance between two points on the outer surface of the cross section of member A.

(Configuration of Adhesive Tape 40)
The adhesive tape 40 is formed in a long strip shape. The adhesive tape 40 has a base material and an adhesive layer provided on one surface of the base material. The adhesive tape 40 is made of, for example, a material having elasticity. Note that, for example, a resin material or paper can be used as the material of the base material. For example, a polyolefin resin such as polyethylene or polypropylene, a polyamide resin such as nylon, or polyvinyl chloride can be used as the resin material.

The adhesive tape 40 is wound around the outer periphery of the wire bundle 30 so as to bundle the multiple electric wires 20 that constitute the wire bundle 30. The adhesive tape 40 is provided, for example, on a portion of the length of the wire bundle 30. The adhesive tape 40 is provided, for example, so as to cover the entire outer periphery of the wire bundle 30 in the circumferential direction. The adhesive tape 40 is wound spirally around the outer periphery of the wire bundle 30 along the length of the wire bundle 30 so that the adhesive layer faces the wire bundle 30. The adhesive tape 40 is wound spirally around the outer periphery of the wire bundle 30 so that, for example, a portion of the width of the adhesive tape 40 overlaps. That is, the adhesive tape 40 has an overlap winding structure. Here, the overlap winding structure is a structure in which the adhesive tape 40 is wound spirally so that certain portions of the adhesive tape 40 in the width direction overlap each other. In the overlap winding structure, the ratio of the width of the later wound portion to the total width of the earlier wound portion is called the overlapping amount. As an example of overlap winding, half-lap winding can be used, in which half the width of the tape member is overlapped. Note that the lap amount in half-lap winding is half. The adhesive tape 40 of this embodiment has a half-lap winding structure.

The adhesive tape 40 is wound around the outer periphery of the wire bundle 30, for example, using a tape winding device 60 (see FIG. 8, etc.) described below. In other words, the adhesive tape 40 is automatically and mechanically wound around the outer periphery of the wire bundle 30 by the tape winding device 60, not manually by an operator.

The adhesive tape 40 is wound spirally around the outer periphery of the electric wire bundle 30 at a constant pitch. Here, the "pitch" of the adhesive tape 40 in this specification refers to the distance traveled in the length direction of the electric wire bundle 30 when the adhesive tape 40 makes one revolution around the outer periphery of the electric wire bundle 30. In other words, the "pitch" of the adhesive tape 40 is the distance (spacing) between the width direction center of the adhesive tape 40 in the i (i is a natural number of 1 or more) revolution and the width direction center of the adhesive tape 40 in the (i+1) revolution. In addition, the "constant pitch" in this specification includes a case where there is no error from the standard pitch (design value), as well as a case where there is an error (variation) of about ±5 mm from the standard pitch. The smaller the error of the pitch of the adhesive tape 40 from the standard pitch, the more preferable it is. The pitch of the adhesive tape 40 in this embodiment is within a range of ±0.2 mm from the standard pitch. The adhesive tape 40 is wound spirally around the outer periphery of the electric wire bundle 30 so that the overlapping amount in the overlapping winding is constant, for example.

Next, the structure of the wire bundle 30 with the adhesive tape 40 wrapped around it will be described with reference to Figures 3 and 4. Figures 3 and 4 each show an example of the structure of the wire bundle 30. Note that in Figures 3 and 4, the adhesive tape 40 is drawn in perspective.

As shown in Figs. 3 and 4, the wire bundle 30 has a small twist. Here, the "twist" of the wire bundle 30 refers to the deformation that occurs in the wire bundle 30 when it is rotated in a plane perpendicular to the length direction of the wire bundle 30. The wire bundle 30 shown in Fig. 3 has no twist, and each of the wires 20 constituting the wire bundle 30 extends straight along the length direction of the wire bundle 30. The wire bundle 30 shown in Fig. 4 has a relatively small twist. As shown in Fig. 4, in the twisted wire bundle 30, the two wires 20 constituting the wire bundle 30 are twisted in a spiral shape. Specifically, in the twisted wire bundle 30, each of the wires 20 constituting the wire bundle 30 rotates in a spiral shape along the length direction of the wire bundle 30, and the two wires 20 are twisted together.

The wire bundle 30 has a twist such that the amount of rotation of each wire 20 per 10 cm along the length direction of the wire bundle 30 is 2 rotations or less. In other words, the amount of twist of the wire bundle 30 is 2 rotations or less/10 cm. It is more preferable that the amount of twist of the wire bundle 30 is 1 rotation or less/10 cm. In addition, the wire bundle 30 has a twist such that the twist pitch P1 in the wire bundle 30 is 5 cm or more. Here, the "twist pitch P1 in the wire bundle 30" refers to the distance that the wires 20 constituting the wire bundle 30 advance in the length direction of the wire bundle 30 when they make one spiral revolution. It is more preferable that the twist pitch P1 in the wire bundle 30 is 10 cm or more.

Here, the twist amount of the wire bundle 30 shown in FIG. 3 is 0 turns/10 cm. Also, the twist pitch P1 (see FIG. 4) in the wire bundle 30 shown in FIG. 3 is 10 cm or more. The twist amount of the wire bundle 30 shown in FIG. 4 is 2 turns/10 cm. Also, the twist pitch P1 in the wire bundle 30 shown in FIG. 4 is 5 cm.

Next, the structure of the adhesive tape 40 wrapped around the outer periphery of the electric wire bundle 30 will be described in detail with reference to Figures 5, 6 and 7. In order to make it easier to understand the structure of the adhesive tape 40 wrapped around the outer periphery of the electric wire bundle 30, Figures 5, 6 and 7 illustrate the structure of the adhesive tape 40 after being wrapped around the outer periphery of the electric wire bundle 30 and then removed from the outer periphery of the electric wire bundle 30. Figures 5 and 6 are schematic plan views showing the adhesive tape 40 after being removed from the outer periphery of the electric wire bundle 30. Figure 7 is a schematic vertical cross-sectional view showing the adhesive tape 40 after being removed from the outer periphery of the electric wire bundle 30.

The adhesive tape 40 has a length direction, a width direction that is perpendicular to the length direction in a plan view, and a thickness direction that is perpendicular to both the length direction and the width direction. In this specification, the length extending along the length direction of the adhesive tape 40 is sometimes referred to as the "tape length", the length extending along the width direction of the adhesive tape 40 is sometimes referred to as the "tape width", and the length extending along the thickness direction of the adhesive tape 40 is sometimes referred to as the "tape thickness".

As shown in FIG. 5, each end surface in the length direction of the adhesive tape 40 is a cut surface 40A. That is, a cut surface 40A is provided at both ends in the length direction of the adhesive tape 40. The cut surface 40A is, for example, a surface where the adhesive tape 40 is cut in a straight line. The cut surface 40A extends linearly along a first direction D1 that intersects with the length direction of the adhesive tape 40. Here, the first direction D1 may be a direction parallel to the width direction of the adhesive tape 40, or may be a direction that intersects with the width direction of the adhesive tape 40. The cut surface 40A of the adhesive tape 40 of this embodiment extends linearly along the first direction D1 that intersects with the width direction of the adhesive tape 40.

The cut surface 40A has a first end 41 and a second end 42 in the first direction D1. The first end 41 is provided at a position closest to the opposite cut surface 40A among the cut surfaces 40A. The second end 42 is provided at a position farthest from the opposite cut surface 40A among the cut surfaces 40A. The first end 41 in this embodiment is an end in the width direction of the adhesive tape 40. The second end 42 in this embodiment is an end in the width direction of the adhesive tape 40. The protruding length PL1 of the cut surface 40A is 5 mm or less. Here, the protruding length PL1 of the cut surface 40A is the length between the first end 41 and the second end 42 along the length direction of the adhesive tape 40. The smaller the protruding length PL1 of each cut surface 40A, the more preferable. The protruding length PL1 of each cut surface 40A in this embodiment is 0.2 mm or less.

As shown in FIG. 6, the adhesive tape 40 has a first portion 51 having a first width W1 and a second portion 52 having a second width W2. The adhesive tape 40 has, for example, a plurality of first portions 51 and a plurality of second portions 52. The first width W1 is the tape width in the first portion 51, and is the length of the first portion 51 extending along the width direction of the adhesive tape 40. The second width W2 is the tape width in the second portion 52, and is the length of the second portion 52 extending along the width direction of the adhesive tape 40.

The second width W2 is smaller than the first width W1. The second width W2 is 0.5 times or more and less than 1 times the length of the first width W1. It is preferable that the second width W2 is 0.8 times or more and less than 1 times the length of the first width W1. For example, when the second width W2 is 0.5 times the length of the first width W1, the variation in tape width can be suppressed to less than 50% over the entire length of the adhesive tape 40. For example, when the second width W2 is 0.8 times the length of the first width W1, the variation in tape width can be suppressed to less than 20% over the entire length of the adhesive tape 40.

The first width W1 of the first portion 51 is the tape width of the adhesive tape 40 before it is wrapped around the outer circumference of the wire bundle 30, that is, 0.8 to 1 times the original tape width of the adhesive tape 40. For example, if the first width W1 is 0.8 times the original tape width of the adhesive tape 40, the shrinkage rate of the tape width of the first portion 51 relative to the original tape width of the adhesive tape 40 can be kept to less than 20%.

The first portion 51 has, for example, a larger dimension in the longitudinal direction of the adhesive tape 40 than the second portion 52. More specifically, the length of the first portion 51 along the longitudinal direction of the adhesive tape 40, i.e., the tape length of the first portion 51, is larger than the length of the second portion 52 along the longitudinal direction of the adhesive tape 40, i.e., the tape length of the second portion 52. The tape length of the first portion 51 is, for example, 1.5 times or more and less than 3.5 times the tape length of the second portion 52. It is preferable that the tape length of the first portion 51 is, for example, 2.5 times or more and less than 3.5 times the tape length of the second portion 52.

The adhesive tape 40 has first portions 51 and second portions 52 arranged alternately along the length of the adhesive tape 40. In the adhesive tape 40, the first portions 51 and second portions 52 are arranged periodically along the length of the adhesive tape 40. That is, in the adhesive tape 40, the first portions 51 and second portions 52 are arranged alternately at a predetermined period P2. In one period P2, one first portion 51 and one second portion 52 are arranged in series. Here, one period P2 corresponds to the length of one revolution when the adhesive tape 40 is spirally wound around the outer periphery of the electric wire bundle 30. In other words, in the adhesive tape 40, one first portion 51 and one second portion 52 are arranged in series for each revolution in a spiral around the outer periphery of the electric wire bundle 30. When such adhesive tape 40 is wound spirally around the outer circumference of wire bundle 30 multiple times, multiple first portions 51 are provided at the same positions relative to one another in the circumferential direction of wire bundle 30, and multiple second portions 52 are provided at the same positions relative to one another in the circumferential direction of wire bundle 30. That is, each of first portions 51 and second portions 52 is always provided at the same position relative to the circumferential direction of wire bundle 30.

As shown in FIG. 7, the first portion 51 has a first thickness T1. The second portion 52 has a second thickness T2. The first thickness T1 is the tape thickness in the first portion 51, and is the length of the first portion 51 extending along the thickness direction of the adhesive tape 40. The second thickness T2 is the tape thickness in the second portion 52, and is the length of the second portion 52 extending along the thickness direction of the adhesive tape 40.

The second thickness T2 is smaller than the first thickness T1. The second thickness T2 is 0.5 times or more and less than 1 times the first thickness T1. It is preferable that the second thickness T2 is 0.8 times or more and less than 1 times the first thickness T1. For example, when the second thickness T2 is 0.5 times the first thickness T1, the variation in tape thickness can be suppressed to less than 50% over the entire length of the adhesive tape 40. For example, when the second thickness T2 is 0.8 times the first thickness T1, the variation in tape thickness can be suppressed to less than 20% over the entire length of the adhesive tape 40.

The first thickness T1 of the first portion 51 is the thickness of the adhesive tape 40 before it is wrapped around the outer circumference of the wire bundle 30, i.e., 0.8 to 1 times the original thickness of the adhesive tape 40. For example, when the first thickness T1 is 0.8 times the original thickness of the adhesive tape 40, the shrinkage rate of the tape thickness of the first portion 51 relative to the original thickness of the adhesive tape 40 can be suppressed to less than 20%.

(Method of manufacturing the wire harness 10)
Next, a method for manufacturing the wire harness 10 will be described with reference to Fig. 8 to Fig. 13. Here, a tape winding method for winding the adhesive tape 40 around the outer periphery of the electric wire bundle 30 will be described in detail. The tape winding operation of the adhesive tape 40 around the electric wire bundle 30 is performed using a tape winding device 60 shown in Fig. 8 to Fig. 13. Note that, in Fig. 9 to Fig. 13, a plurality of electric wires 20 in the electric wire bundle 30 are illustrated as one unit for the sake of simplicity.

(Configuration of the tape winding device 60)
First, the configuration of the tape winding device 60 will be described.
8, the tape winding device 60 includes a pair of holding members 61 that horizontally hold the electric wire bundle 30, and a device main body 62 that is movable in the longitudinal direction of the electric wire bundle 30 along the longitudinal direction of the electric wire bundle 30. Although not shown, the tape winding device 60 includes a moving member that moves the device main body 62. By adjusting the moving speed of the device main body 62, the tape winding device 60 can spirally wind the adhesive tape 40 around the outer periphery of the electric wire bundle 30 so that parts of the adhesive tape 40 overlap in the width direction.

As shown in FIG. 9, the device body 62 includes a rotating section 70 that rotates around the wire bundle 30, a tape holding section 80 that rotatably holds a roll 81 of adhesive tape 40, and a rotation support section 90 that supports the rotating section 70. The roll section 81 is configured, for example, by wrapping the adhesive tape 40 in a spiral shape multiple times around the outer periphery of a core member 82 that has an annular shape.

The rotation support part 90 is formed, for example, in a frame shape that surrounds the outer periphery of the rotating part 70 as a whole. The inner peripheral surface of the rotation support part 90 is formed, for example, in an arc shape. The outer peripheral surface of the rotation support part 90 is formed, for example, in an arc shape. The rotation support part 90 has an opening 91 provided at a part of the circumference of the rotation support part 90. The opening 91 opens in the radial direction of the rotation support part 90. The opening 91 is inclined, for example, so that the opening width becomes smaller as it goes from the radial outside to the radial inside of the rotation support part 90.

The rotating part 70 is configured to be rotatable around the electric wire bundle 30 by, for example, a motor (not shown). The rotating part 70 has a storage section 71 capable of storing a part of the electric wire bundle 30 in the longitudinal direction. The storage section 71 is formed, for example, in a U-shape when viewed from the front. The storage section 71 has a back wall section 72. The inner peripheral surface of the back wall section 72 is formed, for example, in an arc shape. The storage section 71 has, for example, a guide section 73 that guides the electric wire bundle 30 toward the inside of the storage section 71, that is, toward the back wall section 72. The guide section 73 is inclined so that the opening width becomes smaller as it goes from the radial outside to the radial inside of the rotating part 70. The electric wire bundle 30 is stored inside the storage section 71, for example, so that the outer peripheral surface of the electric wire bundle 30 contacts the inner peripheral surface of the back wall section 72.

In the initial state of the tape winding device 60, i.e., before the rotating part 70 starts rotating, the rotating part 70 is in a state (open state) in which the guide part 73 of the storage part 71 is arranged to overlap the opening 91 of the rotation support part 90 in a front view. As shown in Figures 9, 10, 11 and 12, the rotating part 70 rotates clockwise around the wire bundle 30 when the tape winding device 60 is in operation. During operation of the tape winding device 60, except for the open state (see Figure 9), the guide part 73 of the storage part 71 is in a state (closed state) blocked by the rotation support part 90 (see Figures 10 to 12).

The tape holding section 80 is provided on the rotating section 70. The tape holding section 80 is provided, for example, adjacent to the rear wall section 72 of the storage section 71. As shown in Figs. 10 to 12, the tape holding section 80 is configured to be rotatable around the electric wire bundle 30 as the rotating section 70 rotates. The tape holding section 80 rotatably holds the roll section 81 of the adhesive tape 40. Here, the tip of the pull-out section 40D of the adhesive tape 40 pulled out from the roll section 81 is adapted to be adhered to the outer periphery of the electric wire bundle 30. Then, as the pull-out section 40D of the adhesive tape 40 is pulled, the roll section 81 rotates counterclockwise around the central axis of the roll section 81.

Next, a method for winding the adhesive tape 40 using the tape winding device 60 will be described.
First, as shown in Fig. 8, the electric wire bundle 30 is held horizontally by a pair of holding members 61. At this time, the device main body 62 is disposed, for example, at a position separated from the side of the electric wire bundle 30 (i.e., in a direction intersecting the longitudinal direction of the electric wire bundle 30). In addition, the rotating part 70 of the device main body 62 is set to the open state shown in Fig. 9.

Next, as shown in FIG. 9, the device body 62 is set on the wire bundle 30. Specifically, the device body 62 is moved toward the wire bundle 30, and the wire bundle 30 is introduced into the storage section 71 through the opening 91 and the guide section 73. The wire bundle 30 is introduced into the storage section 71 until it comes into contact with the rear wall section 72 of the storage section 71.

Then, the tip of the adhesive tape 40 is attached to the outer periphery of the electric wire bundle 30. Specifically, the tip of the pull-out portion 40D of the adhesive tape 40 pulled out from the roll portion 81 is attached to the outer periphery of the electric wire bundle 30 that has been introduced to the inner wall portion 72 of the storage portion 71.

Next, the adhesive tape 40 is spirally wound around the outer periphery of the electric wire bundle 30. Specifically, the device main body 62 is moved in the length direction of the electric wire bundle 30 by a moving means (not shown) while the rotating part 70 is rotated around the electric wire bundle 30, thereby spirally winding the adhesive tape 40 around the outer periphery of the electric wire bundle 30. At this time, by moving the device main body 62 at a constant speed, the adhesive tape 40 can be spirally wound around the outer periphery of the electric wire bundle 30 at a constant pitch. In addition, by adjusting the moving speed of the device main body 62, the adhesive tape 40 can be overlap-wound around the outer periphery of the electric wire bundle 30, and the lap allowance of the overlap winding can be adjusted.

Here, in the conventional tape winding device, when the adhesive tape 40 is wound around the outer circumference of the electric wire bundle 30, a large tension is always applied to the drawn-out portion 40D drawn out from the roll portion 81. That is, in all the states shown in FIG. 9 to FIG. 12, a large tension is applied to the drawn-out portion 40D. In this case, the electric wire bundle 30 is subjected to a force that swings in a direction intersecting the length direction of the electric wire bundle 30 (for example, the circumferential direction of the electric wire bundle 30) due to the tension of the adhesive tape 40. Therefore, during the tape winding operation using the conventional tape winding device, a force that swings in the circumferential direction of the electric wire bundle 30 is always applied to the electric wire bundle 30. As a result, as shown in FIG. 14, a large twist occurs in the electric wire bundle 30. For example, the amount of twist of the electric wire bundle 30 when the adhesive tape 40B is wound using the conventional tape winding device is about 5 turns or more/10 cm. That is, when the adhesive tape 40B is wound using a conventional tape winding device, the wire bundle 30 is twisted so that each wire 20 rotates 5 times or more per 10 cm along the length of the wire bundle 30. When such a large twist occurs in the wire bundle 30, a problem occurs in that the length of the wire bundle 30 becomes shorter.

In addition, when winding tape using a conventional tape winding device, the pull-out portion 40D is always pulled in the lengthwise direction between the wire bundle 30 and the roll portion 81 and is in a tensed state. When the pull-out portion 40D is in a tensed state, the pull-out portion 40D elastically stretches in the lengthwise direction, and the tape width and tape thickness of the adhesive tape 40B decrease by the amount of this stretch.

More specifically, as shown in FIG. 15, the tape width W3 of the adhesive tape 40B wound using a conventional tape winding device is smaller than the tape width W4 of the adhesive tape 40C, which is the adhesive tape 40B before it is wound around the outer circumference of the wire bundle 30. The tape width W3 of the adhesive tape 40B is smaller than the tape width W4 of the adhesive tape 40C over the entire length of the adhesive tape 40B. The tape width W3 of the adhesive tape 40B is a constant width over the entire length of the adhesive tape 40B. The tape width W3 of the adhesive tape 40B is less than half the original tape width W4 of the adhesive tape 40C.

Also, as shown in FIG. 16, the tape thickness T3 of the adhesive tape 40B wound using a conventional tape winding device is smaller than the tape thickness T4 of the adhesive tape 40C before being wound around the outer circumference of the wire bundle 30. The tape thickness T3 of the adhesive tape 40B is smaller than the tape thickness T4 of the adhesive tape 40C over the entire length of the adhesive tape 40B. The tape thickness T3 of the adhesive tape 40B is a constant thickness over the entire length of the adhesive tape 40B. The tape thickness T3 of the adhesive tape 40B is less than half the original tape thickness T4 of the adhesive tape 40C.

In contrast, as shown in FIG. 13, the tape winding device 60 of this embodiment has a first section S1 in which a first tension is applied to the pull-out portion 40D of the adhesive tape 40, and a second section S2 in which a second tension different from the first tension is applied to the pull-out portion 40D. In the first section S1, as in the conventional tape winding device, a large first tension is applied to the pull-out portion 40D of the adhesive tape 40. Therefore, in the first section S1, the pull-out portion 40D is pulled in the length direction between the wire bundle 30 and the roll portion 81 and is in a tensed state. In the second section S2, a second tension smaller than the first tension is applied to the pull-out portion 40D of the adhesive tape 40. That is, in the second section S2, the tension applied to the adhesive tape 40 is relaxed compared to the first section S1. Therefore, in the second section S2, the tension state of the pull-out portion 40D is released. As a result, in the second section S2, the force applied to the electric wire bundle 30 due to the tension of the adhesive tape 40, i.e., the force that causes the electric wire bundle 30 to vibrate in the circumferential direction, is smaller than in the first section S1. Therefore, in the second section S2, the electric wires 20 in the electric wire bundle 30 can be suitably prevented from vibrating in the circumferential direction. As a result, the occurrence of twisting in the electric wire bundle 30 can be suitably prevented. In this way, in the tape winding device 60 of this embodiment, the tension applied to the adhesive tape 40 is relaxed in the second section S2, which is part of the rotation range of the rotating part 70, thereby preventing the occurrence of twisting in the electric wire bundle 30.

In the tape winding device 60, for example, about 1/4 of the rotation range of the rotating part 70 is set as the first section S1, and about 3/4 of the rotation range of the rotating part 70 is set as the second section S2. The size of each of the first section S1 and second section S2 can be set arbitrarily. Here, the portion wound with tape in the first section S1 becomes the second part 52 of the adhesive tape 40 shown in Figures 6 and 7, and the portion wound with tape in the second section S2 becomes the first part 51 of the adhesive tape 40 shown in Figures 6 and 7. Therefore, the length of the first section S1 corresponds to the length of the second part 52, and the length of the second section S2 corresponds to the length of the first part 51.

More specifically, in the first section S1, the pull-out portion 40D is in a state of tension in the length direction between the wire bundle 30 and the roll portion 81. When the pull-out portion 40D is in a tensioned state, the pull-out portion 40D elastically stretches in the length direction, and the tape width and tape thickness of the adhesive tape 40 are reduced by the amount of the stretch. As a result, as shown in Figs. 6 and 7, the tape width and tape thickness in the second portion 52 are reduced. On the other hand, in the second section S2, the tension applied to the pull-out portion 40D is relaxed, and the tension state of the pull-out portion 40D is released. Therefore, in the second section S2, the tape width and tape thickness of the adhesive tape 40 can be prevented from being reduced compared to the first section S1. As a result, as shown in Figs. 6 and 7, the first width W1 of the first portion 51 is greater than the second width W2 of the second portion 52, and the first thickness T1 of the first portion 51 is greater than the second thickness T2 of the second portion 52.

As shown in FIG. 8, the tape winding process using the tape winding device 60 described above involves winding the adhesive tape 40 over a predetermined range in the longitudinal direction of the wire bundle 30. Tension is then applied to the pull-out portion 40D of the adhesive tape 40, and the tensioned pull-out portion 40D is cut by a slide cutter (not shown). This completes the tape winding operation. The slide cutter is provided, for example, in the device body 62. As shown in FIG. 5, the cut surface 40A of the adhesive tape 40 cut by the slide cutter is a surface where the adhesive tape 40 has been cut in a straight line.

Here, FIG. 17 shows the cut surface 100A of the adhesive tape 100 when the adhesive tape 100 is manually cut by an operator, that is, the cut surface 100A of the adhesive tape 100 of the comparative example. The cut surface 100A is cut by the operator pulling the adhesive tape 100 in the length direction. Therefore, the adhesive tape 100 at the cut surface 100A is stretched and the cut surface 100A is formed into an uneven shape. As a result, the protruding length PL2 of the cut surface 100A is greater than the protruding length PL1 of the cut surface 40A of the adhesive tape 40 of this embodiment (see FIG. 5). In other words, the protruding length PL1 of the cut surface 40A of the adhesive tape 40 of this embodiment is smaller than the protruding length PL2 of the cut surface 100A of the adhesive tape 100 manually cut by an operator.

Next, the effects of this embodiment will be described.
(1) The wire harness 10 includes an electric wire bundle 30 having a plurality of electric wires 20, and an adhesive tape 40 spirally wound around the outer periphery of the electric wire bundle 30. The amount of twist of the electric wire bundle 30 is an amount of twist such that the amount of rotation of the electric wires 20 per 10 cm along the longitudinal direction of the electric wire bundle 30 is within 2 rotations.

With this configuration, the amount of twist in the wire bundle 30 is within 2 turns/10 cm, which reduces the amount of twist in the wire bundle 30. This effectively prevents the length of the wire bundle 30 from becoming shorter due to the twist in the wire bundle 30, improving the quality of the wire harness 10.

(2) Each of the multiple electric wires 20 has a conductor cross-sectional area of ⁵ mm2 or less. That is, each of the multiple electric wires 20 is a thin electric wire with a small conductor cross-sectional area. Here, when the electric wires 20 constituting the electric wire bundle 30 are thin electric wires, the electric wire bundle 30 is likely to be twisted. Even when the electric wire bundle 30 is constituted by such thin electric wires 20, the amount of twist of the electric wire bundle 30 can be kept small, within 2 turns/10 cm. As a result, even when each of the electric wires 20 constituting the electric wire bundle 30 is a thin electric wire, it is possible to suitably suppress the shortening of the lengthwise dimension of the electric wire bundle 30 due to the twist of the electric wire bundle 30.

(3) The wire bundle 30 is composed of two electric wires 20. Here, the fewer the number of electric wires 20 constituting the wire bundle 30, the more likely it is that the wire bundle 30 will twist. For this reason, when the wire bundle 30 is composed of two electric wires 20, the wire bundle 30 is most likely to twist. Even when the wire bundle 30 is composed of two electric wires 20, which are most likely to twist, the amount of twist in the wire bundle 30 can be kept small, within two turns/10 cm. As a result, even when the wire bundle 30 is composed of two electric wires 20, it is possible to suitably prevent the lengthwise dimension of the wire bundle 30 from becoming shorter due to the twist in the wire bundle 30.

(4) The end faces of the adhesive tape 40 in the longitudinal direction are formed into cut surfaces 40A that extend in a straight line. This allows the quality of the cut surfaces 40A of the adhesive tape 40 to be improved compared to the cut surfaces 100A obtained when the adhesive tape 100 is cut manually by an operator. In other words, the quality of the cut surfaces 40A of the adhesive tape 40 can be improved compared to the cut surfaces 100A that have irregularities.

(5) The protruding length PL1 of the cut surface 40A is 5 mm or less. With this configuration, the protruding length PL1 of the cut surface 40A can be made smaller than the protruding length PL2 of the cut surface 100A when the adhesive tape 100 is cut manually by an operator. This makes it possible to prevent the adhesive tape 40 from being unintentionally stretched at the cut surface 40A. Therefore, the quality of the cut surface 40A of the adhesive tape 40 can be improved compared to the cut surface 100A when the adhesive tape 100 is cut manually by an operator.

(6) The adhesive tape 40 has a first portion 51 having a first width W1 and a second portion 52 having a second width W2 smaller than the first width W1. The second width W2 is at least 0.5 times but less than 1 time the first width W1. With this configuration, the difference in tape width between the first portion 51 and the second portion 52 can be kept to within 50%. This allows the variation in tape width of the adhesive tape 40 to be kept to within 50%. Therefore, when the adhesive tape 40 is overlap-wound around the outer periphery of the wire bundle 30, the variation in the overlap allowance in the overlap winding can be kept small.

(7) The first portion 51 has a first thickness T1. The second portion 52 has a second thickness T2 that is smaller than the first thickness T1. The second thickness T2 is greater than or equal to 0.5 times and less than 1 time the first thickness T1. With this configuration, the difference in tape thickness between the first portion 51 and the second portion 52 can be kept within 50%. This allows the variation in tape thickness of the adhesive tape 40 to be kept within 50%.

(8) The first portion 51 has a larger dimension along the length direction of the adhesive tape 40 than the second portion 52. With this configuration, the length of the second portion 52, which has a smaller tape width, can be made shorter than the first portion 51. This makes it possible to reduce the area of the second portion 52, which has a smaller tape width, along the length direction of the adhesive tape 40. Therefore, when the adhesive tape 40 is wrapped around the outer periphery of the wire bundle 30 in an overlapping manner, it is possible to suitably prevent the overlapping allowance from becoming small during the overlapping winding.

(9) The adhesive tape 40 has a plurality of first portions 51 and a plurality of second portions 52, and the first portions 51 and the second portions 52 are arranged in an alternating manner along the length of the adhesive tape 40. The adhesive tape 40 is spirally wound around the outer periphery of the electric wire bundle 30 a plurality of times. The first portions 51 are arranged at the same positions as one another in the circumferential direction of the electric wire bundle 30. The second portions 52 are arranged at the same positions as one another in the circumferential direction of the electric wire bundle 30. According to this configuration, when the adhesive tape 40 is spirally wound around the outer periphery of the electric wire bundle 30 a plurality of times, each of the first portions 51 and the second portions 52 can always be arranged at the same positions in the circumferential direction of the electric wire bundle 30. As a result, the quality of winding the adhesive tape 40 around the outer periphery of the electric wire bundle 30 can be improved.

(10) The adhesive tape 40 is wrapped around the outer periphery of the electric wire bundle 30 at a constant pitch. Therefore, when the adhesive tape 40 is wrapped in an overlapping manner, the adhesive tape 40 can be wrapped around the outer periphery of the electric wire bundle 30 so that the overlapping amount in the overlapping winding is constant. This improves the quality of wrapping the adhesive tape 40 around the outer periphery of the electric wire bundle 30.

Other Embodiments
The above embodiment can be modified as follows: The above embodiment and the following modifications can be combined with each other to the extent that no technical contradiction occurs.

- In the above embodiment, the wire bundle 30 is configured with two wires 20, but the number of wires 20 that configure the wire bundle 30 is not particularly limited. For example, the wire bundle 30 may include three or more wires 20.

In the above embodiment, each of the plurality of electric wires 20 is a thin electric wire, but this is not limited thereto. For example, each of the plurality of electric wires 20 may be a thick electric wire having a large conductor cross-sectional area. Here, in this specification, a "thick electric wire" refers to an electric wire having a conductor cross-sectional area of more than 5 ^mm2 .

In the above embodiment, the multiple electric wires 20 constituting the electric wire bundle 30 may be electric wires of different sizes. For example, the electric wire bundle 30 may be composed of one or more thin electric wires and one or more thick electric wires.

- In the above embodiment, the adhesive tape 40 is wound around the outer periphery of the electric wire bundle 30 in an overlapping manner, but this is not limited to this. For example, the adhesive tape 40 may be roughly wound around the outer periphery of the electric wire bundle 30. In other words, the adhesive tape 40 may be spirally wound around the outer periphery of the electric wire bundle 30 such that the adhesive tape 40 wound later around the outer periphery of the electric wire bundle 30 does not overlap the adhesive tape 40 wound earlier around the outer periphery of the electric wire bundle 30.

- In the above embodiment of the tape winding device 60, the device body 62 is moved along the length direction of the wire bundle 30, but this is not limited to the above. For example, the wire bundle 30 may be moved relative to the device body 62.

In the above embodiment, the twist amount of the wire bundle 30 in the wire harness 10 after the adhesive tape 40 is wrapped around the outer periphery of the wire bundle 30 may be an amount of twist such that the amount of rotation of the wires 20 per 10 cm along the longitudinal direction of the wire bundle 30 is within 2 rotations, and the twist pitch P1 of the wire bundle 30 in the wire harness 10 after the adhesive tape 40 is wrapped around the outer periphery of the wire bundle 30 may be 5 cm or more.

In the above embodiment, FIG. 6 is a schematic plan view showing the adhesive tape 40 after being removed from the outer periphery of the electric wire bundle 30 and returned to a straight line, and FIG. 7 is a schematic vertical cross-sectional view showing the adhesive tape 40 after being removed from the outer periphery of the electric wire bundle 30 and returned to a straight line. The first width W1 in the first portion 51 of the adhesive tape 40 and the second width W2 in the second portion 52 of the adhesive tape 40 may be the tape width of the adhesive tape 40 after the adhesive tape 40 is wound around the outer periphery of the electric wire bundle 30, and the first thickness T1 in the first portion 51 of the adhesive tape 40 and the second thickness T2 in the second portion 52 of the adhesive tape 40 may be the tape thickness of the adhesive tape 40 after the adhesive tape 40 is wound around the outer periphery of the electric wire bundle 30.

The wire harness 10 of the illustrated embodiment may be a vehicle wire harness for electrically connecting electrical devices 2 and 3 mounted on a vehicle 1, and the vehicle wire harness may include
Two or more electric wires 20;
and an adhesive tape 40 wound around the two or more electric wires 20 with a constant overlap margin over a predetermined electric wire bundle length so that the two or more electric wires 20 form one electric wire bundle 30 having no branch over the predetermined electric wire bundle length,
After the adhesive tape 40 is wound around the two or more electric wires 20, the two or more electric wires 20 can form a parallel electric wire bundle extending parallel to each other as shown in FIG. 3 over the specified electric wire bundle length, or can form a twisted electric wire bundle extending twisted with a wire twist pitch as shown in FIG. 4, and the wire twist pitch may be a constant value and be 5 cm or more.

- The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims, not by the meaning described above, and is intended to include all modifications within the meaning and scope of the claims.

REFERENCE SIGNS LIST 1 vehicle 2, 3 electrical device 10 wire harness 20 electric wire 21 core wire 22 insulating coating 30 electric wire bundle 40 adhesive tape 40A cut surface 40D lead-out

portion

40B, 40C adhesive tape 41 first end 42 second end 51 first portion 52 second portion 60 tape winding device 61 holding member 62 device body 70 rotating portion 71 storage portion 72 inner wall portion 73 guiding portion 80 tape holding portion 81 roll portion 82 core member 90 rotation support portion 91 opening 100 adhesive tape 100A cut surface P1 pitch P2 period PL1 protruding length PL2 protruding length S1 first section S2 second section T1 first thickness T2 second thickness T3, T4 tape thickness W1 First width W2 Second width W3, W4 Tape width

Claims

A wire bundle having a plurality of wires;
and an adhesive tape spirally wound around the outer periphery of the electric wire bundle,
The wire harness, wherein the twist amount of the electric wire bundle is an amount of twist such that the number of rotations of the electric wires per 10 cm along the longitudinal direction of the electric wire bundle is 2 or less.
The wire harness according to claim 1 , wherein each of the plurality of electric wires has a conductor cross-sectional area of 5 mm 2 or less.
The wire harness according to claim 1 or 2, wherein the wire bundle is composed of two of the wires.
The end surface of the adhesive tape in the longitudinal direction is a cut surface,
The wire harness according to claim 1 , wherein the cut surface extends linearly along a first direction intersecting a longitudinal direction of the adhesive tape.
the cut surface has a first end and a second end in the first direction;
5. The wire harness according to claim 4, wherein a protruding length of the cut surface, which is a length between the first end and the second end along a longitudinal direction of the adhesive tape, is 5 mm or less.
the adhesive tape has a first portion having a first width and a second portion having a second width smaller than the first width,
The wire harness according to claim 1 , wherein the second width is equal to or greater than 0.5 times and less than 1 time the first width.
the first portion has a first thickness;
the second portion has a second thickness that is less than the first thickness;
The wire harness according to claim 6, wherein the second thickness is equal to or greater than 0.5 times and less than 1 time the first thickness.
The wire harness according to claim 6 or 7, wherein the first portion has a larger dimension along the length direction of the adhesive tape than the second portion.
the adhesive tape has a plurality of the first portions and a plurality of the second portions, the first portions and the second portions being alternately arranged one by one along a longitudinal direction of the adhesive tape,
the adhesive tape is spirally wound around the outer periphery of the electric wire bundle a plurality of times,
The first portions are provided at the same positions as one another in a circumferential direction of the electric wire bundle,
The wire harness according to claim 6 , wherein the second portions are provided at the same positions as one another in a circumferential direction of the electric wire bundle.
The wire harness according to any one of claims 1 to 9, wherein the adhesive tape is spirally wrapped around the outer circumference of the bundle of electric wires at a constant pitch.