WO2018016336A1

WO2018016336A1 - Corrugated tube and wire harness

Info

Publication number: WO2018016336A1
Application number: PCT/JP2017/024797
Authority: WO
Inventors: 芳正水野; 英敏石田; 泰行山本; 進也佐土原
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: 2016-07-19
Filing date: 2017-07-06
Publication date: 2018-01-25
Also published as: JP2018014787A

Abstract

The purpose of the present invention is to provide a technique which enables a plurality of wiring members to be easily arranged at specific intervals. This corrugated tube is provided with a bellows tube section, a joint, and a support section. The bellows tube section has protrusions and recesses, which are formed alternately in the extension direction, and a first wiring member is inserted through the bellows tube section. The joint is provided protruding from the outer periphery of the bellows tube section to the outside thereof. The support section is provided closer to the front end side of the joint than the base end side thereof and is capable of supporting a second wiring member parallel to the first wiring member.

Description

Corrugated tube and wire harness

This invention relates to a technique for arranging a plurality of electric wires apart from each other.

The wire harness described in Patent Document 1 divides a plurality of electric wires of a low voltage system circuit and a plurality of electric wires of a high voltage system circuit, and a plurality of electric wires of the low voltage system circuit and a plurality of electric wires of a high voltage system circuit. In this case, it is possible to prevent an adverse effect on the low-voltage circuit due to electromagnetic noise generated from the electric wire of the high-voltage system circuit.

JP 2004-355839 A

However, in the technique described in Patent Document 1, the work of winding an insulating sheet around a plurality of electric wires is troublesome. Further, depending on the winding method, there is a possibility that the intervals between the plurality of electric wires of the low voltage system circuit and the plurality of electric wires of the high voltage system circuit are not stable.

Therefore, an object of the present invention is to provide a technique capable of easily arranging a plurality of wiring members apart in a manner having a predetermined interval.

In order to solve the above problem, a corrugated tube according to a first aspect includes a bellows tube portion in which convex portions and concave portions are alternately formed along the extending direction, and the first wiring member is inserted, and the bellows tube A joint projecting so as to extend from the outer periphery of the part to the outside of the bellows tube part, and provided on the distal end side of the base end of the joint and supporting the second wiring member in a posture parallel to the first wiring member Possible supports.

The corrugated tube according to the second aspect is the corrugated tube according to the first aspect, and the support portion is formed in a bellows tubular shape.

The corrugated tube according to the third aspect is the corrugated tube according to the first or second aspect, and the joint is formed with an attachment hole to which a clamp including a vehicle body locking portion can be attached.

A corrugated tube according to a fourth aspect is the corrugated tube according to any one of the first to third aspects, wherein the support portion and the joint are not extended along an extending direction of the second wiring member. It is formed continuously.

A corrugated tube according to a fifth aspect is the corrugated tube according to any one of the first to fourth aspects, wherein a cross section of the bellows tube portion is formed larger than a cross section of the support portion. .

A wire harness according to a sixth aspect includes a corrugated tube according to any one of the first to fifth aspects, a first wiring member inserted through the bellows tube part, and a second supported by the support part. A wiring member.

The wire harness which concerns on a 7th aspect is a wire harness which concerns on a 6th aspect, Comprising: The 3rd wiring member parallel to the said 1st wiring member and the said 2nd wiring member is arrange | positioned on the said coupling. .

According to the first to fifth aspects, by arranging the first wiring member and the second wiring member respectively on the bellows tube portion and the support portion connected via the joint, the first wiring member and the second wiring member are arranged. It is easy to dispose the wiring member so as to have a certain distance.

In particular, according to the second aspect, the corrugated tube can be easily bent in a direction in which the direction orthogonal to the direction in which the bellows tube portion and the support portion are aligned is set inward and outward in the region where the support portion protects the second wiring member. It becomes.

Particularly, according to the third aspect, it is possible to easily attach a clamp for locking the corrugated tube to the vehicle body. Moreover, since the mounting hole is formed, the flexibility of the corrugated tube can be improved.

Particularly, according to the fourth aspect, the corrugated tube can be easily bent even in the direction in which the bellows tube portion and the support portion are arranged.

Particularly, according to the fifth aspect, the thin wiring member can be supported by the support portion while the thick wiring member is supported by the bellows tube portion.

In particular, according to the sixth aspect, since the bellows tube portion that supports the first wiring member and the support portion that supports the second wiring member are connected via a joint, the first wiring member and the second wiring member are connected. It is easy to dispose them.

Particularly, according to the seventh aspect, the third wiring member can be easily added.

It is a perspective view which shows the corrugated tube which concerns on 1st Embodiment, and a wire harness provided with the same. It is a front view which shows the modification of the wire harness which concerns on 1st Embodiment. It is a perspective view which shows the corrugated tube which concerns on 2nd Embodiment, and a wire harness provided with the same.

{First embodiment}
Hereinafter, the corrugated tube and the wire harness including the corrugated tube according to the first embodiment will be described. FIG. 1 is a perspective view showing a corrugated tube 20 and a wire harness 10 including the corrugated tube 20 according to the first embodiment.

The wire harness 10 includes a corrugated tube 20, a first wiring member 12, and a second wiring member 14 parallel to the first wiring member 12. The first wiring member 12 is inserted through a bellows tube portion 22 described later of the corrugated tube 20, and the second wiring member 14 is supported by a support portion 40 described later of the corrugated tube 20. Thereby, in the wire harness 10, the 1st wiring member 12 and the 2nd wiring member 14 are arrange | positioned apart. As a result, the influence of noise between the first wiring member 12 and the second wiring member 14 can be reduced.

Each

wiring member

12, 14 includes at least one electric wire 11. Here, the 1st wiring member 12 is demonstrated as what is comprised by the bundle | flux of the some electric wire 11. FIG. In addition, here, the second wiring member 14 will be described as including a so-called twisted electric wire 15 in which two electric wires 11 are twisted together, and a sheath 16 provided around the twisted electric wire 15. Then, in a state where the wire harness 10 is incorporated in the vehicle, the

wiring members

12 and 14 are connected to various electrical components mounted on the vehicle via connectors or the like provided at the ends of the electric wires 11. Thereby, the wire harness 10 plays the role which electrically connects the various electrical components mounted in the vehicle. The electric wires 11 included in the wire harness 10 are bundled in a form corresponding to the laying route in the vehicle.

Here, the first wiring member 12 is a member that is likely to be a noise source, and the second wiring member 14 is a member that is easily affected by noise from the first wiring member 12. Examples of such a combination of the

wiring members

12 and 14 include one in which the first wiring member 12 is a power supply line and the second wiring member 14 is a signal line. Here, the first wiring member 12 is a power supply line, the second wiring member 14 is a cable for in-vehicle LAN communication, and particularly here, the second wiring member 14 is a high-speed conforming to the Ethernet (registered trademark) standard. The description will be made assuming that the cable is for communication. The first wiring member 12 and the second wiring member 14 are spaced apart to reduce the influence of the noise.

Here, as a method of reducing the influence of noise in the

wiring members

12 and 14, using a shielded wire in which a shield layer and an outer skin are formed around the insulated wire as the wire 11 constituting the

wiring members

12 and 14, and For example, keep away from noise sources. However, if a shielded wire is used as the wire 11 constituting the wiring member, the cost of the wire harness may be increased and the shield layer needs to be grounded. Therefore, here, the

wiring members

12 and 14 are separated from each other instead of using the non-shielded wires as the wires 11 constituting the

wiring members

12 and 14, so that the

wiring members

12 and 14 are suppressed while increasing costs. It is intended to reduce the influence of noise between. Of course, a shielded electric wire may be adopted as the electric wire 11 constituting the

wiring members

12 and 14.

The corrugated tube 20 includes a bellows tube portion 22, a joint 30, and a support portion 40. The corrugated tube 20 is made of a resin such as PP (polypropylene) or PA (polyamide), for example.

The bellows tube portion 22 has a shape in which convex portions 24 and concave portions 26 are alternately formed on the outer peripheral surface side along the extending direction. The roles of the convex portion 24 and the concave portion 26 are reversed on the inner peripheral surface side. Accordingly, the bellows tube portion 22 is easily bent while being elastically deformed. The first wiring member 12 is inserted through the bellows tube portion 22. In the example shown in FIG. 1, the bellows tube portion 22 is formed in a circular cross section. However, the shape of the bellows tube portion 22 is not limited to this. For example, the bellows tube portion 22 may be formed in an elliptical cross section. In this case, the joint 30 may extend from the outer peripheral portion in the major axis direction or may extend from the outer peripheral portion in the minor axis direction.

The joint 30 is provided so as to extend from the outer periphery of the bellows tube portion 22 to the outside of the bellows tube portion 22. Here, the joint 30 is formed so as to extend linearly from the outer periphery of the bellows tube portion 22 in the radial direction of the bellows tube portion 22. Therefore, here, the extension line of the joint 30 intersects the central axis of the bellows tube portion 22. However, the extending direction of the joint 30 is not limited to this, and may extend in a direction intersecting the radial direction. The joint may extend in a curved shape.

The fitting 30 is provided with a mounting hole 34 to which the clamp 50 including the vehicle body locking portion 52 can be attached. Specifically, the joint 30 includes a plurality of partial joints 32 here. The plurality of partial joints 32 are formed at intervals along the axial direction of the bellows tube portion 22. Here, a space surrounded on all sides by the adjacent partial joint 32, the bellows tube portion 22, and the support portion 40 is defined as an attachment hole 34. But the shape of the attachment hole 34 is not restricted to what was mentioned above, For example, the attachment hole 34 may be formed in the partial joint 32 so that four directions may be enclosed by the partial joint 32. FIG.

The support portion 40 is provided on the distal end side of the base end of the joint 30. The support part 40 can support the second wiring member 14 in a posture parallel to the first wiring member 12. In the example shown in FIG. 1, the support portion 40 is formed in a bellows tubular shape like the bellows tube portion 22. In the example shown in FIG. 1, the dimension along the extending direction of the support part 40 and the dimension along the extending direction of the bellows tube part 22 are approximately the same, but either one may be longer.

Specifically, the support portion 40 has a shape in which convex portions 42 and concave portions 44 are alternately formed along the extending direction. The convex portion 42 includes a large convex portion and a small convex portion having a projecting dimension smaller than the large convex portion and larger than the concave portion, and these and the concave portion 44 are arranged along the extending direction. It is conceivable that the concave portions 44, the small convex portions, and the concave portions 44 are alternately formed in this order. Further, the support portion 40 is provided at the tip of the joint 30. Under the present circumstances, the support part 40 is provided in the position where the extension line of the coupling 30 and the central axis of the support part 40 cross.

Since the support part 40 is formed in a bellows tubular shape, the support part 40 is also easily deformed while being elastically deformed in a state where the second wiring member 14 is continuously covered with the support part 40. Here, since the corrugated tube 20 is connected to the bellows tube portion 22 and the support portion 40 by the joint 30, the corrugated tube 20 is unlikely to bend in a direction in which the extending direction of the joint 30 is the inside / outside direction. However, the corrugated tube 20 is easily bent in a direction that is orthogonal to the axial direction and in which the direction orthogonal to the extending direction of the joint 30 is the inner and outer directions.

In the bellows tube portion 22 and the support portion 40, slits 22S and 40S extending along the axial direction are formed. Accordingly, the bellows tube portion 22 and the support portion 40 are easily opened by the

slits

22S and 40S, so that the

wiring members

12 and 14 can be easily disposed therein. The

slits

22S and 40S are preferably formed at positions symmetrical with respect to the joint 30. Here, the slits 22 S and 40 S are formed in a direction orthogonal to the extending direction of the joint 30. The

slits

22S and 40S are formed on the side opposite to the side where the vehicle body locking portion 52 is provided. However, the

slits

22S and 40S may not be provided.

Here, the cross section of the bellows tube portion 22 is formed larger than the cross section of the support portion 40. As described above, the first wiring member 12 inserted through the bellows tube portion 22 is a member that easily becomes a noise source, and the second wiring member 14 supported by the support portion 40 is configured to prevent noise from the first wiring member 12. It is a sensitive member. In such a case, the first wiring member 12 usually has a larger diameter (thick material) than the second wiring member 14 in many cases. In order to cope with this, the cross section of the bellows tube portion 22 is formed larger than the cross section of the support portion 40 here.

The corrugated tube 20 is formed by integral molding, for example. Specifically, the corrugated tube 20 is formed by pressing a molten resin fed into a mold whose inner surface is formed in the same shape as the outer surface of the corrugated tube 20 by a method such as blow or vacuum. The mold may be composed of an upper mold and a lower mold. In this case, the corrugated tube 20 is easily manufactured if it is formed vertically symmetrical. For this reason, here, the joint 30 extends along a line connecting the central axis of the bellows tube portion 22 and the central axis of the support portion 40.

When the corrugated tube 20 is integrally formed using a mold, the bellows structure is interrupted on the inner peripheral surface of the portion of the bellows tube portion 22 and the support portion 40 where the joint 30 extends from the outer periphery. It is possible that Further, it is conceivable that the joint 30 is formed by performing a punching process on the joint 30 once formed continuously along the axial direction of the bellows tube portion 22.

The clamp 50 is attached to the attachment hole 34. The clamp 50 includes a vehicle body locking portion 52, a mounting portion 54, and a connecting portion 56. The vehicle body locking portion 52 has a shape that can be locked to the vehicle body, for example, a shape that can be locked to a hole formed in the vehicle body. The attachment portion 54 is formed in a shape that can be locked in the attachment hole 34. In the attachment portion 54, for example, a concave groove 54h having a width dimension comparable to the thickness dimension of the partial joint 32 is formed. The mounting portion 54 is locked to the mounting hole 34 by inserting the opposing edge portions of the partial joints 32 adjacent to the concave groove 54h. The connecting portion 56 is a portion that connects the vehicle body locking portion 52 and the mounting portion 54. As described above, here, the joint 30 is formed along a line connecting the central axis of the bellows tube portion 22 and the central axis of the support portion 40. On the other hand, when the vehicle body locking portion 52 is locked to the vehicle body, the vehicle body locking portion 52 preferably protrudes outward from the corrugated tube 20 so that the corrugated tube 20 does not get in the way. In order to cope with this, the dimension along the extending direction of the connecting portion 56 is equal to or longer than the outer diameter of the bellows tube portion 22 (here, slightly longer). A vehicle body locking portion 52 projects from the tip (see FIG. 2).

Further, here, in order to insert the edge of the partial joint 32 into the concave groove 54h, the clamp 50 is inserted into the mounting hole 34 from the vehicle body locking portion 52 side. For this reason, the vehicle body locking portion 52 is formed smaller than the mounting hole 34. In addition, the connecting portion 56 is formed larger than the attachment hole 34, and is formed to be smaller than the attachment hole 34 by being bent so as to pass through the attachment hole 34. Here, the connecting portion 56 is formed with a through hole 56 h along the extending direction of the joint 30 in an intermediate portion along the axial direction of the bellows tube portion 22. Thereby, the connection part 56 can bend.

{Modification of wire harness}
Here, the modification of the wire harness 10 which concerns on 1st Embodiment is demonstrated, referring FIG. FIG. 2 is a front view showing a modification of the wire harness 10 according to the first embodiment.

In the wire harness 10 A according to the modified example, a third wiring member 18 parallel to the first wiring member 12 and the second wiring member 14 is disposed on the joint 30.

The third wiring member 18 is less affected by noise on the second wiring member 14 than the first wiring member 12, and is affected by noise received from the first wiring member 12 than the second wiring member 14. Is preferably small. As such a combination of the first wiring member 12, the second wiring member 14, and the third wiring member 18, for example, the first wiring member 12 is a high-voltage power supply line, and the second wiring member 14 is a signal. A combination in which the third wiring member 18 is a low-voltage power supply line is conceivable. Further, for example, the first wiring member 12 is a power line, the second wiring member 14 is a signal line that is susceptible to noise such as a signal line for high-speed communication, and the third wiring member 18 is a signal for a sensor. A combination that is a signal line that is not easily affected by noise, such as a line or a signal line for low-speed communication, can be considered.

When the third wiring member 18 is disposed on the joint 30 and the clamp 50 is attached to the attachment hole 34 of the joint 30, as shown in FIG. The third wiring member 18 may be disposed on the side opposite to the side where the portion 52 is provided. When the third wiring member 18 is disposed on the joint 30 and the clamp 50 is not attached to the attachment hole 34 of the joint 30, the third wiring member 18 is disposed on either side of the joint 30. It may be arranged on both sides.

When the third wiring member 18 is disposed on the joint 30, the corrugated tube 20 and the third wiring member 18 may be fixed by, for example, winding a binding member such as a tape around it. It is done. Alternatively, for example, a clamp provided on the third wiring member 18 separately from the clamp 50 may be inserted into the mounting hole 34. For example, the clamp 50 may be provided with a wiring member support portion that can support the third wiring member 18.

According to the corrugated tube 20 configured as described above and the wire harnesses 10 and 10A including the corrugated tube 20, the first wiring member 12 and the first wiring member 12 are respectively connected to the bellows tube portion 22 and the support portion 40 connected via the joint 30. By disposing the two wiring members 14, it is easy to dispose the first wiring member 12 and the second wiring member 14 apart from each other so as to have a constant interval. At this time, since the corrugated tube 20 is a molded product, the interval between the first wiring member 12 and the second wiring member 14 for each product is stabilized.

In addition, since the support portion 40 is formed in a bellows tubular shape, at least the direction orthogonal to the direction in which the bellows tube portion 22 and the support portion 40 are arranged is at least inside and outside the region where the support portion 40 protects the second wiring member 14. The corrugated tube 20 can be easily bent in the direction.

Further, since the attachment hole 34 is formed in the joint 30, the clamp 50 for locking the corrugated tube 20 to the vehicle body can be easily attached. Further, the flexibility of the corrugated tube 20 can be improved by the amount of the mounting hole 34 formed.

Further, since the cross section of the bellows tube portion 22 is formed larger than the cross section of the support portion 40, the support portion 40 is made of a thin material while the bellows tube portion 22 supports the thick first wiring member 12. The second wiring member 14 can be supported.

Further, according to the wire harness 10A, the third wiring member 18 can be easily added.

{Second Embodiment}
Next, a corrugated tube and a wire harness including the corrugated tube according to the second embodiment will be described. FIG. 3 is a perspective view showing a corrugated tube 20B and a wire harness 10B including the corrugated tube 20B according to the second embodiment. In the description of the present embodiment, the same components as those described above are denoted by the same reference numerals, and the description thereof is omitted.

In the corrugated tube 20B according to the second embodiment, the shape of the support portion 40B is different from the shape of the support portion 40 of the corrugated tube 20 according to the first embodiment.

The support portion 40B is formed discontinuously along the extending direction of the second wiring member 14. Here, the support portion 40 B includes a plurality of partial support portions 46 provided in each partial joint 32. At this time, the partial support portion 46 is formed in a cylindrical shape instead of a bellows tubular shape. This is because when the corrugated tube 20 is bent, the second wiring member 14 is easily bent between the adjacent partial support portions 46. Of course, the partial support part 46 may be formed in a bellows tubular shape.

The dimension along the axial direction of the partial support portion 46 is set to be approximately the same as that of the partial joint 32. The dimension along the axial direction of the partial support portion 46 may be set longer than the partial joint 32 or may be set shorter. Here, the partial support portion 46 is formed so as not to protrude with respect to the partial joint 32 along the axial direction, but is formed so as to protrude with respect to the partial joint 32 along the axial direction. Also good.

Each slit 46S is formed in each partial support 46. Thereby, each partial support part 46 can be split open by the slit 46S, and it becomes easy to arrange | position the 2nd wiring member 14 to each partial support part 46. FIG.

According to the corrugated tube 20 B configured as described above and the wire harness 10 B including the corrugated tube 20 B, the support portion 40 B and the joint 30 are formed discontinuously along the extending direction of the second wiring member 14. The corrugated tube 20 can be easily bent not only when the direction perpendicular to the direction in which the tube portion 22 and the support portion 40 are arranged is set to the inside and outside directions, but also when the direction in which the bellows tube portion 22 and the support portion 40 are arranged is set to the inside and outside directions. can do.

{Other variations}
In 1st Embodiment, although the cross section of the bellows tube part 22 was demonstrated as what was formed larger than the cross section of the support part 40, this is not essential. The cross section of the bellows tube portion 22 and the cross section of the support portion 40 may be the same size, or the cross section of the support portion 40 may be larger than the cross section of the bellows tube portion 22.

Moreover, in 1st Embodiment, the support part 40 may be discontinuous, for example, the part between the adjacent joints 30 among the support parts 40 may be cut | disconnected. In this case, similarly to the corrugated tube 20 according to the second embodiment and the wire harness 10 including the corrugated tube 20, the corrugated tube 20 can be easily bent even when the direction in which the bellows tube portion 22 and the support portion 40 are aligned is set to the inside / outside direction. can do.

In addition, each structure demonstrated by said each embodiment and each modification can be suitably combined unless it mutually contradicts.

Although the present invention has been described in detail as described above, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Wire harness 11 Electric wire 12 1st wiring member 14 2nd wiring member 15 Twist electric wire 16 Sheath 18 3rd wiring member 20 Corrugated tube 22 Bellows tube part 24 Convex part 26 Concave part 30 Joint 32 Partial joint 34 Attachment hole 40 Support part 42 Convex part Part 44 Concave part 46 Partial support part 50 Clamp 52 Car body locking part 54 Attachment part 56 Connection part

Claims

A bellows tube portion in which convex portions and concave portions are alternately formed along the extending direction, and the first wiring member is inserted,
A joint projecting from the outer periphery of the bellows tube portion to the outside of the bellows tube portion;
A support portion that is provided on the front end side of the base end of the joint and can support the second wiring member in a posture parallel to the first wiring member;
Corrugated tube comprising.
The corrugated tube according to claim 1,
The said support part is a corrugated tube currently formed in the bellows tubular shape.
The corrugated tube according to claim 1 or 2,
The corrugated tube in which the attachment hole which can attach the clamp containing a vehicle body latching | locking part is formed in the said coupling.
The corrugated tube according to any one of claims 1 to 3,
The said support part and the said coupling are corrugated tubes currently formed discontinuously along the extension direction of the said 2nd wiring member.
The corrugated tube according to any one of claims 1 to 4, wherein
A corrugated tube in which a cross section of the bellows tube portion is formed larger than a cross section of the support portion.
The corrugated tube according to any one of claims 1 to 5,
A first wiring member inserted through the bellows tube portion;
A second wiring member supported by the support part;
A wire harness comprising:
The wire harness according to claim 6,
A wire harness in which a third wiring member parallel to the first wiring member and the second wiring member is disposed on the joint.