JP2014193058A - Wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire harness improved in adaptiveness to a difference in thickness of a wire bundle by being capable of preventing a branch wire portion from being damaged, without disturbing easiness of the wire bundle to be bent in the case where a region including a branching part in a main wire portion of the wire bundle is covered with a protective tube having flexibility.SOLUTION: A band type protector 3 comprises a band part 31 wound around a branch wire portion 92 and a band holding part 32 communicating to one end of the band part 31. The band holding part 32 holds the band part 31 in a ring shape with a length corresponding to thickness of the branch wire portion 92. On a surface of the band type protector 3, a pair of steps 33 are formed which oppose inner side surfaces and outer side surfaces of a pair of edges 22 facing a cut 21 in a protective tube 2 covering a main wire portion 91 of a wire bundle 90.

Description

  The present invention relates to a wire harness including a protective tube that covers a main line portion of an electric wire bundle having a branching structure.

  In a wire harness mounted on a vehicle such as an automobile, an electric wire bundle having a branch structure includes a main line portion including a plurality of electric wires and a branch line portion including an electric wire branched from the main line portion.

  Moreover, as shown in Patent Documents 1 and 2, a wire harness including a bundle of electric wires having a branch structure may include a corrugated tube that covers the periphery of the main line portion. In the wire harnesses disclosed in Patent Documents 1 and 2, the corrugated tube covers the periphery of the region including the branch portion of the branch line portion in the main line portion. The corrugated tube is an example of a protective tube having flexibility, and a cut along the longitudinal direction of the main line portion is formed.

  When a corrugated tube covers the circumference | surroundings of the area | region containing the branch part in a main line part, it will be in the state which the branch line part extended from the cut | interruption of a corrugated tube. Therefore, it is necessary to prevent damage to the branch line portion caused by rubbing the pair of edge portions facing the cut in the corrugated tube with the branch line portion.

  In the wire harness disclosed in Patent Document 1, the branch protection member is attached to a portion where the branch line portion extends from the corrugated tube. The branch protection member disclosed in Patent Document 1 has a flange portion in which a groove into which a pair of edge portions of a corrugated tube is fitted and a branch guide portion that supports a branch line portion.

  On the other hand, in the wire harness shown in Patent Document 2, a protective member having a branch structure covers the branch portion of the wire bundle, and the corrugated tube covers the main line portion from the outside of the protective member.

Japanese Utility Model Publication No. 5-23722 JP 2007-288972 A

  In the wire harnesses disclosed in Patent Documents 1 and 2, the protective member attached to the branch portion of the wire bundle hinders the ease of bending the main line portion and the branch line portion. If the wire bundle is difficult to bend, the workability of laying the wire harness deteriorates.

  Furthermore, in the wire harnesses shown in Patent Documents 1 and 2, it is necessary to prepare protective members having different sizes according to the thickness of the wire bundle. In recent years, it has been desired to increase adaptability to differences in the thickness of the wire bundle and reduce the cost of the wire harness.

  The present invention can prevent damage to the branch line portion without hindering the bendability of the wire bundle when the region including the branching portion in the main wire portion of the wire bundle is covered with a flexible protective tube. An object of the present invention is to provide a wire harness excellent in adaptability to differences in thickness.

The wire harness which concerns on a 1st aspect is provided with each component shown below.
(1) A 1st component is an electric wire bundle which has the main line part containing a some electric wire, and the branch line part containing the electric wire branched from this main line part.
(2) The second component is a flexible protective tube that covers the periphery of the main line portion including the branch portion of the branch line portion and has a cut along the longitudinal direction of the main line portion.
(3) The third component is a band portion wound around the branch line portion and connected to one end of the band portion, and the band portion is annularly wound around the branch line portion with a length corresponding to the thickness of the branch line portion. A band-type protective device having a band holding portion for holding. On the surface of the band-type protector, a pair of stepped portions that are opposed to the inner surface and the outer surface of each of the pair of edges facing the cut in the protective tube are formed.

  The wire harness according to the second aspect is an aspect of the wire harness according to the first aspect. The wire harness which concerns on a 2nd aspect WHEREIN: The said band holding | maintenance part of the said band type protector has a frame part and an engaging part which are shown below. The said frame part is a part which makes the edge part of the band through-hole which continues in one end of the said band part and penetrates in parallel with the extension direction of the one end. The engaging portion is a portion that holds the band portion in an annular shape by engaging with a part of the band portion that is passed through the band through hole of the frame portion. And the said band part is passed through the said band through hole from the side connected to the end of the said band part in the said frame part to the other side.

  The wire harness according to the third aspect is an aspect of the wire harness according to the second aspect. The wire harness which concerns on a 3rd aspect WHEREIN: The said pair of level | step-difference part is formed in the surface of the said band part, and the surface of the said frame part.

  The wire harness according to the fourth aspect is an aspect of the wire harness according to any one of the first aspect to the third aspect. In the wire harness according to the fourth aspect, the pair of stepped portions are a series of grooves formed on the surface of the band-type protector.

  The wire harness according to the fifth aspect is one aspect of the wire harness according to any one of the first to third aspects. In the wire harness according to the fifth aspect, the pair of step portions includes a plurality of protrusions formed in two rows on the surface of the band portion.

  In each of the above aspects, the band-type protector having the band portion wound around the branch line portion prevents damage to the branch line portion caused by rubbing the pair of edge portions facing the cut in the protective tube with the branch line portion.

  Moreover, a pair of level | step-difference parts facing the inner surface and outer surface of each of a pair of edge part which faces the cut | interruption in a protection tube are formed in the surface of a band-type protector. A pair of level | step-difference part prevents that a pair of edge part in a protection tube remove | deviates from a band type protective device. Therefore, it is not necessary to widen the width of the band portion in view of the positional displacement of the protective tube with respect to the band portion. Accordingly, since the band portion having a relatively narrow width is only wound around the branch line portion, the ease of bending the wire bundle is not hindered. In addition, a pair of edge part which faces a cut is an edge part of the both sides of a cut.

  Moreover, the band holding part of the band-type protective device holds the band part in an annular shape wound around the branch line part with a length corresponding to the thickness of the branch line part. Therefore, it is not necessary to prepare a band-type protective device having a different size according to the thickness of the branch line portion. That is, the band type protector in each of the above aspects is excellent in adaptability to the difference in the thickness of the wire bundle.

  In the second mode, the band part of the band-type protective device is passed through the band through hole from the side connected to one end of the band part in the frame part of the band holding part to the opposite side. In this case, the band-type protective device is sandwiched between the cuts of the protective tube with a thickness close to the diameter of the branch line portion. Therefore, it is possible to avoid an excessive gap at the portion where the branch line portion extends at the break of the protective tube.

  In the third aspect, the pair of step portions for preventing the displacement of the protective tube are formed on the surfaces of the band portion and the frame portion in the band-type protector. In this case, the range in which the pair of stepped portions is formed is widened, and the displacement of the protective tube can be more reliably prevented.

  Moreover, in a 4th aspect, a pair of level | step-difference part is a series of groove | channels formed in the surface of a band-type protector. In this case, it is preferable in that the structure of the band-type protective device is simple.

  In the fifth aspect, the pair of stepped portions includes a plurality of protrusions formed in two rows on the surface of the band portion. In this case, the height of the pair of stepped portions, that is, the height of the plurality of protruding portions can be increased without impairing the flexibility of the band portion. By increasing the height of the pair of stepped portions, it is possible to prevent the displacement of the protective tube more reliably.

It is a perspective view of wire harness 1 concerning an embodiment. 2 is a front view of a branch line portion of the wire harness 1. FIG. It is a perspective view of the band type protective equipment 3 with which the wire harness 1 is provided. 4 is a cross-sectional view of a band holding part 32 of the band-type protector 3. FIG. It is a perspective view of the electric wire bundle with which the band type protective equipment 3 was attached. It is a perspective view of 3 A of band-type protectors which concern on the application example applicable to the wire harness.

  Hereinafter, embodiments will be described with reference to the accompanying drawings. The following embodiment is an example embodying the present invention, and is not an example of limiting the technical scope of the present invention.

  First, a schematic configuration of the wire harness 1 according to the embodiment will be described with reference to FIGS. The wire harness 1 is mounted on a vehicle such as an automobile. As shown in FIGS. 1 and 2, the wire harness 1 includes an electric wire bundle 90, a protective tube 2, and a band-type protective device 3.

<Wire bundle>
As shown in FIG. 5, the wire bundle 90 has a branch structure. That is, the electric wire bundle 90 includes a main line portion 91 including a plurality of bundled electric wires 9 and a branch line portion 92 including the electric wires 9 branched from the main line portion 91. The electric wire 9 is an insulated wire having a linear conductor and an insulating coating covering the periphery thereof.

  In the example shown in FIGS. 1 and 5, the branch line portion 92 includes a plurality of electric wires 9. However, it is also conceivable that the branch line portion 92 is a single electric wire 9.

<Protection tube>
The protective tube 2 is a cylindrical member having flexibility. The protective tube 2 is a member made of a synthetic resin such as polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), polyethylene terephthalate (PET), or polyamide (PA).

  The protective tube 2 shown in FIGS. 1 and 2 is a corrugated tube formed in a cylindrical shape having irregularities alternately in the longitudinal direction. The corrugated tube has high flexibility by having a structure in which irregularities are alternately formed in the longitudinal direction.

  The protective tube 2 covers the periphery of the region including the branch portion of the branch line portion 92 in the main wire portion 91 of the wire bundle 90. The protective tube 2 is formed with a cut 21 along the longitudinal direction of the main line portion 91 over the entire length thereof. The main line portion 91 of the wire bundle 90 is inserted into the protective tube 2 from the cut 21.

  As shown in FIG. 1, the branch line portion 92 of the wire bundle 90 extends from the cut 21 of the protection tube 2. Therefore, it is necessary to prevent damage to the branch line portion 92 caused by rubbing the pair of edge portions 22 facing the cut line 21 in the protective tube 2 with the branch line portion 92. In addition, a pair of edge part 22 which faces the cut line 21 is an edge part of the both sides of the cut line 21 in the protective tube 2.

  It is also conceivable that the protective tube 2 is fixed to the main line portion 91 of the electric wire bundle 90 with an adhesive tape (not shown) at both ends thereof.

<Band-type protective equipment>
The band-type protector 3 is a protector for preventing damage to the branch line portion 92 caused by rubbing the pair of edge portions 22 in the protective tube 2 with the branch line portion 92. The band-type protector 3 is a member of a synthetic resin such as polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), polyethylene terephthalate (PET), or polyamide (PA).

  The band-type protector 3 has a band part 31 and a band holding part 32. The band part 31 is a strip-like part having flexibility. In the wire harness 1, the band portion 31 is wound around the branch line portion 92.

  As shown in FIGS. 3 and 4, the band holding portion 32 is formed continuously with the first end 311 of the band portion 31. The band holding part 32 holds the band part 31 in an annular shape wound around the branch line part 92 with a length corresponding to the thickness of the branch line part 92. In FIG. 3, the branch line portion 92 of the wire bundle 90 is drawn with a virtual line (two-dot chain line).

  As shown in FIGS. 3 and 4, the band holding portion 32 in this embodiment includes a frame portion 321 and an engaging portion 322. The frame portion 321 is a portion that is connected to the first end 311 of the band portion 31 and forms an edge portion of the band through hole 320 penetrating in parallel with the extending direction of the first end 311.

  The engaging portion 322 is a portion that holds the band portion 31 in an annular shape by engaging with a part of the band portion 31 that is passed through the band passage hole 320 of the frame portion 321. In the example shown in FIG. 4, the engaging portion 322 is a protruding portion formed on the surface of the frame portion 321 on the band through hole 320 side.

  The protruding engaging portion 322 holds the band portion 31 in an annular shape by engaging with a recess 313 formed on one surface of the band portion 31. A plurality of concave portions 313 are formed side by side in the longitudinal direction of the band portion 31.

  The engagement portion 322 of the band holding portion 32 selectively engages with any of the plurality of recesses 313 in the band portion 31, so that the band portion 31 has a length corresponding to the thickness of the branch line portion 92 to the branch line portion 92. It is held in an annular shape. In addition, the excess part which protruded from the band holding | maintenance part 32 in the band part 31 is cut off.

  In order for the engaging portion 322 to selectively engage with any of the plurality of concave portions 313 in the band portion 31, the engaging portion 322 needs to be displaced by the depth of the concave portion 313 and temporarily separated from the band portion 31. is there.

  In the example shown in FIG. 3, a pair of cuts 323 are formed on both sides of a portion of the frame portion 321 where the engaging portion 322 is formed. That is, the part in which the engaging part 322 is formed in the frame part 321 has a cantilever shape. Thereby, the part in which the engaging part 322 in the frame part 321 was formed becomes easy to elastically deform. As a result, the engaging portion 322 is easily displaced from the band portion 31 by being displaced by the depth of the concave portion 313.

  As shown in FIG. 4, the band part 31 is passed through the band through hole 320 from the side connected to the first end 311 of the band part 31 in the frame part 321 to the opposite side. Therefore, the first end 311 and the second end 312 in the band portion 31 face the same direction substantially in parallel.

  As shown in FIG. 3, a pair of stepped portions 33 are formed on the surface of the band-type protector 3 so as to face the inner surface and the outer surface of each of the pair of edge portions 22 facing the cut 21 in the protective tube 2. Has been.

  That is, as shown in FIGS. 1 and 2, the pair of edge portions 22 of the protective tube 2 is located between the pair of stepped portions 33 in the band-type protector 3 at the portion where the branch line portion 92 extends from the inside to the outside. It fits in.

  In the example shown in FIGS. 1 to 3, the pair of stepped portions 33 is a series of grooves formed on the surface of the band-type protector 3. In the example shown in FIG. 1, the pair of stepped portions 33 is formed on the surface of the band portion 31 and the surface of the frame portion 321. The pair of stepped portions 33 is formed on one surface of the band portion 31, and the plurality of concave portions 313 are formed on the other surface of the band portion 31.

  In addition, the pair of stepped portions 33 in the frame portion 321 is formed on each of two opposite surfaces. That is, the pair of stepped portions 33 on one surface of the frame portion 321 is formed on an extension line of the pair of stepped portions 33 formed near the first end 311 of the band portion 31. In addition, the pair of stepped portions 33 on the other surface of the frame portion 321 is formed on an extension line of the pair of stepped portions 33 formed in the vicinity of the portion of the band portion 31 that is passed through the band through hole 320.

<Effect>
In the wire harness 1, the band-type protector 3 having the band portion 31 wound around the branch line portion 92 prevents damage to the branch line portion 92 due to the pair of edge portions 22 in the protective tube 2 rubbing against the branch line portion 92. .

  Further, the pair of stepped portions 33 formed on the surface of the band-type protective device 3 prevents the pair of edge portions 22 in the protective tube 2 from being detached from the band-type protective device 3. Therefore, it is not necessary to increase the width of the band portion 31 in view of the positional deviation of the protective tube 2 with respect to the band portion 31. Therefore, since the band portion 31 having a relatively narrow width is merely wound around the branch line portion 92, the ease of bending the wire bundle 90 is not hindered.

  Moreover, the band holding part 32 of the band-type protector 3 holds the band part 31 in an annular shape wound around the branch line part 92 with a length corresponding to the thickness of the branch line part 92. Therefore, it is not necessary to prepare the band-type protector 3 having a different size according to the thickness of the branch line portion 92. That is, the band-type protector 3 is excellent in adaptability to the difference in thickness of the wire bundle 90.

  In addition, the band part 31 of the band-type protective device 3 is passed through the band through hole 320 from the side connected to the first end 311 of the band part 31 in the frame part 321 of the band holding part 32 to the opposite side. In this case, as shown in FIG. 2, the band-type protector 3 is sandwiched between the cuts 21 of the protective tube 2 with a thickness close to the diameter of the branch line portion 92. Therefore, it is possible to avoid the occurrence of an excessive gap in the portion where the branch line portion 92 extends from the cut line 21 of the protective tube 2.

  In the example shown in FIG. 3, the pair of stepped portions 33 that prevent the displacement of the protective tube 2 are formed on the surfaces of the band portion 31 and the frame portion 321 in the band-type protector 3. In this case, the range in which the pair of stepped portions 33 is formed is widened, and the displacement of the protective tube 2 can be more reliably prevented.

  Moreover, if a pair of level | step-difference part 33 is a series of groove | channels formed in the surface of the band-type protector 3, it is suitable at the point by which the structure of the band-type protector 3 becomes simple.

<Application example>
Next, a band-type protector 3A according to an application example applicable to the wire harness 1 will be described with reference to FIG. FIG. 6 is a perspective view of the band-type protector 3A. In FIG. 6, the branch line portion 92 of the wire bundle 90 is drawn with a virtual line (two-dot chain line). In FIG. 6, the same components as those shown in FIGS. 1 to 5 are denoted by the same reference numerals.

  The band-type protector 3 </ b> A differs from the band-type protector 3 only in the structure of the pair of step portions. Hereinafter, only the differences between the band-type protector 3A and the band-type protector 3 will be described.

  As shown in FIG. 6, in the band-type protector 3 </ b> A, a pair of first step portions 33 is formed on the surface of the frame portion 321, and a pair of second step portions 33 </ b> A is formed on the surface of the band portion 31. Is formed.

  The pair of first step portions 33 is a series of grooves formed on the surface of the frame portion 321. On the other hand, the pair of second step portions 33 </ b> A are a plurality of protrusions formed in two rows on the surface of the band portion 31. The plurality of protrusions constituting the pair of second step portions 33 </ b> A are formed in a state in which a pair of protrusions opposed in the width direction of the band portion 31 are arranged at intervals in the longitudinal direction of the band portion 31.

  When the band-type protector 3A is applied to the wire harness 1, the pair of edge portions 22 of the protective tube 2 is a pair of step portions in the band-type protector 3A at the portion where the branch line portion 92 extends from the inside to the outside. It fits between 33 and 33A.

  In addition, a groove 320 </ b> A through which the protrusions constituting the pair of second stepped portions 33 </ b> A can pass is formed on the surface of the frame portion 321 on the side of the band through hole 320. Thereby, the band part 31 in which the protrusion part was formed can be passed through the band through hole 320.

  Even when the band-type protector 3 </ b> A is applied to the wire harness 1, the same effect as when the band-type protector 3 is applied to the wire harness 1 can be obtained.

  In addition, when the band-type protector 3A is employed, the height of the pair of second step portions 33A, that is, the height of the plurality of protrusions can be increased without impairing the flexibility of the band portion 31. By increasing the height of the pair of second step portions 33A, it is possible to prevent the displacement of the protective tube 2 more reliably.

<Others>
In the wire harness 1, the protective tube 2 may be a flexible tube other than the corrugated tube.

  Moreover, in the band-type protectors 3 and 3 </ b> A, it is conceivable that the pair of stepped portions are formed only on the surface of the band portion 31.

  Note that the wire harness according to the present invention can be freely combined within the scope of the invention described in each claim, or can be modified as appropriate, or the embodiments and application examples can be appropriately modified. It is also possible to configure by omitting a part.

DESCRIPTION OF SYMBOLS 1 Wire harness 2 Protective tube 3,3A Band type protective device 9 Electric wire 21 Cut line 22 Edge part of protective tube 31 Band part 32 Band holding part 33 A pair of level | step-difference part (1st step part, groove | channel)
33A A pair of second step portions (plural protrusions)
90 Wire bundle 91 Main line portion 92 Branch line portion 311 First end of band portion 312 Second end of band portion 313 Recessed portion of band portion 320 Band through hole 321 Frame portion 322 Engaging portion 320A Groove of frame portion

Claims (5)

An electric wire bundle having a main line portion including a plurality of electric wires and a branch line portion including an electric wire branched from the main line portion;
A flexible protective tube that covers the periphery of the main line portion including the branch portion of the branch line portion and has a cut along the longitudinal direction of the main line portion;
A band part wound around the branch line part, and a band holding part that is connected to one end of the band part and holds the band part in a ring shape with a length corresponding to the thickness of the branch line part, A wire harness comprising: a band-type protector having a pair of step portions facing the inner and outer surfaces of each of the pair of edges facing the cut in the protective tube. The wire harness according to claim 1,
The band holding part of the band-type protective device is
A frame portion that is connected to one end of the band portion and forms an edge of a band through-hole penetrating in parallel with the extending direction of the one end
An engagement portion that holds the band portion in an annular shape by engaging with a part of the band portion that is passed through the band passage hole of the frame portion;
The said band part is a wire harness passed through the said band through hole from the side connected to the end of the said band part in the said frame part to the other side. The wire harness according to claim 2,
The pair of stepped portions is a wire harness formed on the surface of the band portion and the surface of the frame portion. The wire harness according to any one of claims 1 to 3,
The pair of steps is a wire harness that is a series of grooves formed on the surface of the band-type protector. The wire harness according to any one of claims 1 to 3,
The pair of stepped portions is a wire harness including a plurality of protrusions formed in two rows on the surface of the band portion.

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