JP2019013108A - Exterior body for electric wire and wire harness with the same - Google Patents

Abstract

To provide an exterior body for an electric wire, which can prevent an end of an accommodating portion of the electric wire from damaging an electric wire coat and a conductor even if a thermoplastic resin foam sheet is used as a base material of the exterior body of the electric wire.SOLUTION: The exterior body for an electric wire to be attached to an outer periphery of the electric wire, which is formed by bending a thermoplastic resin foam sheet, includes an accommodating portion for accommodating the electric wire. An inclined portion inclined outward is formed at an inner surface end portion of the accommodating portion.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an electric wire outer package and a wire harness with an outer package that are mounted on the outer periphery of an electric wire.

  As an electric wire exterior body mounted on the outer periphery of an electric wire routed in a vehicle or the like, the wire harness is protected from an external force by covering the outer periphery of the wire harness with a hollow plate material in which a hollow structure is formed between a plurality of plate-like members. There is known a protector that protects (Patent Document 1). In Patent Document 1, as a hollow structure of the hollow plate material, an interposition member is used which is a plate-like member having a shape in which a concavo-convex structure composed of peaks and valleys continues in a wavy shape.

  However, since the hollow plate material having the hollow structure of the interposition member has anisotropy in mechanical properties, the directionality of the cut-out is restricted when the hollow plate material is cut into a shape corresponding to the outer package for electric wires. Therefore, sufficient design freedom cannot be obtained. Accordingly, there is a problem in that the cutout shape of the outer casing for the electric wire cannot be arranged in the closest manner in the plane of the hollow plate material, and the cost reduction is hindered. In addition, since the hollow plate has a large uneven structure, it is difficult to cut it into a small shape while uniforming mechanical characteristics, and there is a problem that it is not suitable for forming a small-sized outer package for electric wires.

  Then, it has begun to consider using a resin foam sheet with reduced anisotropy in mechanical properties as a base material of the exterior body of the wire harness instead of the hollow member. On the other hand, the surface layer of the resin foam sheet may be an unfoamed layer that is harder than the foam layer. The thickness of the unfoamed layer is generally 10 μm to 100 μm.

  If the said resin foam sheet is used as an exterior body of a wire harness, the corner | angular part which consists of a hard unfoamed layer will be formed in the edge part of the accommodating part of a wire harness. When the wire harness housed in the housing portion hits the end portion of the housing portion as described above, there is a possibility that the coating or the conductor may be damaged by vibration of the vehicle or the like. Moreover, when arrange | positioning a wire harness in an accommodating part, there exists a possibility that the coating | cover and conductor may be damaged by a wire harness hitting the edge part of an accommodating part.

International Publication No. 2015/016056

  The present invention has been made in view of the above circumstances, and even if a thermoplastic resin foam sheet is used as a base material of an outer casing of an electric wire, the coating or conductor of the electric wire is damaged at the end of the electric wire housing portion. It aims at providing the exterior body for electric wires which can prevent receiving.

  An aspect of the present invention is an electric wire outer package that is formed by bending a thermoplastic resin foam sheet and that is attached to the outer periphery of an electric wire, and accommodates the electric wire that extends along the extending direction of the electric wire. This is an electric wire exterior body in which an inclined portion that is inclined outward is formed at an inner surface end of the accommodating portion.

  An aspect of the present invention is an electric wire outer package in which the inclined portion has a round chamfered shape represented by a curve in a cross section.

  An aspect of the present invention is an electric wire outer package in which the inclined portion has a square chamfered shape represented by a straight line in a cross section.

  An aspect of the present invention is an electric wire outer package in which the round chamfered shape has a curved portion of R 0.05 mm or more and 10.0 mm or less.

  An aspect of the present invention is an electric wire outer package in which the angle of the chamfered shape with respect to the inner surface of the housing portion is 30 ° or more and 60 ° or less.

  An aspect of the present invention is an electric wire outer package in which an uneven portion that is uneven in the longitudinal direction of the housing portion is formed at an end portion of the housing portion.

  An aspect of the present invention is an electric wire outer package in which the distance between the tops of adjacent convex portions of the uneven portion is less than 5.0 mm.

  The aspect of this invention is a wire harness with an exterior body, Comprising: One or more electric wires and the said exterior body for electric wires, The said exterior body for electric wires is mounted | worn with the outer periphery of the said electric wire It is a wire harness with.

  According to the embodiment of the outer sheath for electric wires of the present invention, an inclined portion that is inclined outward is formed at the inner surface end of the housing portion in which the electric wires are accommodated. Even if the thermoplastic resin foam sheet is used, it is possible to prevent the covering of the electric wire from being damaged by the electric wire accommodated in the accommodating portion hitting the end portion of the accommodating portion. In addition, since the inclined portion is formed, it is possible to prevent the covering of the electric wire and the conductor from being damaged even when the electric wire hits the end of the accommodating portion when the electric wire is arranged in the accommodating portion.

  According to the embodiment of the exterior body for electric wires of the present invention, the inclined portion has a round chamfered shape, and the round chamfered shape has a curved portion of R 0.05 mm or more and 10.0 mm or less. Even if it hits, it can prevent more reliably that an electric wire coating | cover and a conductor will be damaged.

  According to the embodiment of the outer casing for an electric wire of the present invention, the inclined portion has a chamfered shape, and the angle of the chamfered shape with respect to the inner surface of the accommodating portion is 30 ° or more and 60 ° or less. Even if the wire hits the part, it is possible to more reliably prevent the coating of the wire and the conductor from being damaged.

  According to the embodiment of the exterior body for an electric wire of the present invention, the contact area between the electric wire and the end portion of the housing portion is formed by forming the uneven portion that is uneven in the longitudinal direction of the housing portion at the end portion of the housing portion. Since it can reduce, an electric wire can be smoothly arrange | positioned in an accommodating part.

It is a perspective view which shows the exterior body which concerns on the example of 1st Embodiment of this invention, and the wire harness with an exterior body which concerns on the example of 1st Embodiment. It is explanatory drawing which shows a part of edge part of an accommodating part in the exterior body which concerns on the example of 1st Embodiment of this invention. It is a perspective view shown in the state where the exterior object concerning the example of the 1st embodiment of the present invention was developed. It is explanatory drawing which shows a part of edge part of an accommodating part in the exterior body which concerns on the 2nd Embodiment of this invention.

  Hereinafter, an electric wire outer package according to an embodiment of the present invention will be described with reference to the drawings.

  First, the embodiment example of the wire harness with an exterior body using the exterior body according to the first embodiment of the present invention will be described with reference to FIGS. A wire harness 1 with an exterior body according to an embodiment of the present invention includes a wire harness 5 in which a plurality of electric wires are bundled, and an exterior body according to a first embodiment attached to the outer periphery of the wire harness 5 Body) 7. The exterior body 7 includes a plurality of wall portions 2 extending along the extending direction of the wire harness 5 (longitudinal direction x in FIG. 1), and is surrounded by the plurality of wall portions 2. It has the accommodating part 3 which accommodates. In addition, in FIG. 1, although the wire harness 5 is shown by one cylindrical shape, the wire harness 5 is provided with one or more electric wires.

  The plurality of wall portions 2 of the exterior body 7 according to the first embodiment are integrally formed by bending a single thermoplastic resin foam sheet. The thermoplastic resin foam sheet has a plurality of wall portions 2 formed by bending the bent portions 20a to 20d. The plurality of wall portions 2 include a bottom wall portion 21, a side wall portion 22 provided continuously from an end edge of the bottom wall portion 21 via a bent portion 20 a, and a bent portion 20 b from an end edge of the bottom wall portion 21. A side wall portion 23 provided continuously through the bent portion 20c, an upper wall portion 24 provided continuously from the front end of the side wall portion 22 via the bent portion 20c, and a bent portion 20d provided from the front end of the side wall portion 23. And a lid wall portion 25. The cross-sectional shape in the lateral direction y, which is a direction orthogonal to the longitudinal direction x of the outer package 7, is substantially rectangular.

  As shown in FIG. 3, the locking portions 251 a to 251 h to be described later can be inserted into the bent portions 20 c of the bent portions 20 a to 20 d, respectively, so that the locking holes are provided at predetermined intervals along the longitudinal direction x. 201a to 201h are formed.

  The upper wall portion 24 extends substantially horizontally with respect to the bottom wall portion 21 from the front end of the side wall portion 23 to the vicinity of the center in the short direction y.

  The lid wall portion 25 is disposed so as to cover and overlap the upper wall portion 24 from above. As shown in FIG. 3, the tip of the lid wall portion 25 has locking pieces 251a to 251h that can be inserted into the locking holes 201a to 201h. The locking pieces 251a to 251h are provided at predetermined intervals corresponding to the locking holes 201a to 201h. Of the locking pieces 251a to 251h, the locking pieces 251a, 251c, 251e, and 251g have a substantially rectangular shape inclined toward one side in the longitudinal direction x from the lid wall portion 25 toward the tip. The pieces 251b, 251d, 251f, and 251h have a substantially rectangular shape that is inclined toward the other side in the longitudinal direction x from the lid wall portion 25 toward the tip. In addition, the shape of the locking pieces 251a to 251h is not limited to the above aspect, and various shapes can be adopted to maintain the shape of the exterior body 7.

  As shown in FIG. 1, the accommodating portion 3 is a portion surrounded by a bottom wall portion 21, side wall portions 22 and 23, an upper wall portion 24, and a lid wall portion 25. The accommodating portion 3 is formed in a cylindrical shape in which one side and the other side in the longitudinal direction x are penetrated by the bottom wall portion 21, the side wall portions 22 and 23, the upper wall portion 24 and the lid wall portion 25, and accommodates the wire harness 5. can do.

  As shown in FIG. 2, an inclined portion 33 is formed at a boundary portion between the end surface portion 31 in the longitudinal direction x of the housing portion 3 and the inner surface 32 of the housing portion 3. The inclined portion 33 is inclined in the outer direction, that is, in the direction of the outer surface 34 and the end surface portion 31 of the housing portion 3. Therefore, the end portion of the inner surface 32 of the housing portion 3 is located closer to the center in the longitudinal direction x of the housing portion 3 than the end portion of the outer surface 34 of the housing portion 3. Here, the above-mentioned “outward direction” means a direction away from the central axis in the longitudinal direction x in the accommodating portion 3 and a direction away from a direction orthogonal to the central axis.

  In the exterior body 7, the inclined portion 33 is formed on the entire portion surrounded by the bottom wall portion 21, the side wall portions 22 and 23, the upper wall portion 24 and the lid wall portion 25, that is, on the entire circumferential direction of the end surface portion 31. Yes. The end surface portion 31 includes an inclined portion 33 having a predetermined inclination with respect to the longitudinal direction x, and a vertical portion having a surface substantially perpendicular to the longitudinal direction x.

  Since the inclined portion 33 inclined toward the outer surface 34 is formed at the end portion of the inner surface 32 of the accommodating portion 3, the end of the accommodating portion 3 can be used even if a thermoplastic resin foam sheet is used as the base material of the exterior body 7. It can prevent that the coating | cover of the wire harness 5 will be damaged by the wire harness 5 accommodated in the accommodating part 3 hitting a part. Further, since the inclined portion 33 is formed, even when the wire harness 5 hits the end of the housing portion 3 when the wire harness 5 is disposed in the housing portion 3, the coating or conductor of the wire harness 5 is damaged. Can be prevented.

  In the exterior body 7, the inclined portion 33 has a round chamfered shape represented by a curve in a side sectional view from the longitudinal direction x. Examples of the curved shape include curved shapes such as a substantially arc shape and a substantially elliptic arc shape. Therefore, the inclined portion 33 has a shape in which the corner of the end portion of the inner surface 32 of the accommodating portion 3 is dropped into a curved shape such as a substantially arc shape or a substantially elliptic arc shape.

  The radius of curvature of the round chamfered curve is not particularly limited, but even if the wire harness 5 hits the end of the housing portion 3, the wire harness 5 coating or conductor is more reliably prevented from being damaged. From this point, it is preferable that the curved portion has a range of R 0.05 mm to 10.0 mm, and a curved portion of R 0.1 mm to 5.0 mm is particularly preferable. In addition, as shown in FIG. 2, the round chamfered shape curve may be formed by a curved portion having a single radius of curvature, or may be formed by a combination of curved portions having a plurality of curvature radii. May be.

  Although the range of the inclined part 33 is not specifically limited, 30% of the thickness of the thermoplastic resin foam sheet in the end surface part 31 from the point which prevents more reliably that the coating | cover and conductor of the wire harness 5 are damaged. The above range is preferable, and a range of 50% or more is particularly preferable. In the exterior body 7, about 50% of the thickness of the thermoplastic resin foam sheet in the end surface portion 31 is the inclined portion 33.

  As shown in FIGS. 1 and 2, in the exterior body 7, an uneven portion 35 that is uneven in the longitudinal direction x is further formed on the end surface portion 31. In FIG. 1, an uneven portion 35 is formed on the entire portion surrounded by the bottom wall portion 21, the side wall portions 22 and 23, the upper wall portion 24 and the lid wall portion 25, that is, the entire end surface portion 31. Moreover, in the exterior body 7, the uneven | corrugated | grooved part 35 becomes a wave shape by which the recessed part 350 and the convex part 351 are arrange | positioned substantially regularly.

  By forming the concavo-convex portion 35 on the end surface portion 31, the contact area between the wire harness 5 and the end portion of the housing portion 3 is reduced, and friction between the wire harness 5 and the end portion of the housing portion 3 can be suppressed. The wire harness 5 can be smoothly arranged in the housing part 3.

  As shown in FIG. 2, in the inclined portion 33, the uneven portion 35 is formed in a region 331 corresponding to a portion shallower than the depth of the recessed portion 350 of the uneven portion 35, and a portion deeper than the depth of the recessed portion 350 of the uneven portion 35. The uneven portion 35 is not formed in the region 330 corresponding to.

  The distance between the tops of the adjacent convex portions 351 is not particularly limited, but it is surely prevented that the electric wire constituting the wire harness 5 enters the concave portion 350 and the smooth arrangement in the housing portion 3 is hindered. From the point, it is preferably less than 5.0 mm, particularly preferably less than 4.0 mm. The lower limit value of the distance between the apexes of the adjacent convex portions 351 is not particularly limited, but is preferably, for example, 1.0 mm.

  Next, the thermoplastic resin foam sheet used for the exterior body 7 will be described. The resin type of the thermoplastic resin foam sheet is not particularly limited as long as it is a thermoplastic resin. For example, polyethylene resin, polypropylene resin, polycarbonate resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polyamide resin, polyphenylene sulfide resin. , Polystyrene resin, polyvinyl chloride resin, polyvinyl acetate resin, polytetrafluoroethylene resin, acrylic resin, and the like.

The density of the thermoplastic resin foam sheet used for the exterior body 7 is not particularly limited, but for example, 200 Kg / in, from the point that anisotropy of mechanical properties is prevented and the design freedom of the exterior body 7 is improved. m ³ or more 1000 Kg / ^{m 3} or less, from the viewpoint of further improving the balance between light weight and mechanical strength, and more preferably from 300 Kg / ^{m 3} or more 600 Kg / ^{m 3} or less, 350 Kg / ^{m 3} or more 550 kg / ^{m 3} The following are particularly preferred: The exterior body 7 is formed by bending a thermoplastic resin foam sheet having a predetermined density.

  Although the thickness of a thermoplastic resin foam sheet is not specifically limited, For example, 0.80 mm or more and 5.0 mm or less are preferable, and 1.0 mm or more and 2 or less from the point which improves the balance of bending ease and mechanical strength more. .5 mm or less is particularly preferable.

  Moreover, since the exterior body 7 has the inclined portion 33 as described above, even if both surfaces or one surface of the thermoplastic resin foam sheet has a non-foamed layer, the coating or conductor of the wire harness 5 is damaged. Can be prevented. By forming the non-foamed layer on the surface of the thermoplastic resin foam sheet, the bending elasticity of the outer package 7 is improved, and the protection performance of the housed wire harness 5 is further improved. In addition, from the point which improves the bending elasticity of the exterior body 7, the structure of the 3 layer structure which has a non-foamed layer on both surfaces of a thermoplastic resin foam sheet is preferable.

  Although the thickness of a non-foaming layer is not specifically limited, For example, 10 micrometers or more and 100 micrometers or less are mentioned.

Further, the cell number density of the foam layer of the thermoplastic resin foam sheet is not particularly limited. For example, the lower limit value is 800 / mm ³ or more from the viewpoint of more surely preventing the anisotropy of mechanical properties. Is more preferable, and 1000 / mm ³ or more is particularly preferable. On the other hand, the upper limit value of the bubble number density is, for example, 10 ¹⁰ pieces / mm ³ or less from the viewpoint of obtaining excellent mechanical strength.

  The ratio of the tensile strength in the second reference linear direction perpendicular to the first reference straight line to the tensile strength in the arbitrary first reference linear direction on the surface of the thermoplastic resin foam sheet is not particularly limited. For example, it is 50% or more and 200% or less, more preferably 60% or more and 180% or less, and still more preferably 80% or more and 120% or less. When the thermoplastic resin foam sheet has a range of the ratio of the tensile strength, the isotropy of mechanical properties can be further improved.

  In addition, the tensile strength of the thermoplastic resin foam sheet is not particularly limited, but the lower limit is preferably 3 MPa or more, more preferably 4 MPa or more, more preferably 6 MPa from the viewpoint that the protective performance of the housed wire harness 5 is further improved. The above is particularly preferable. On the other hand, the upper limit value of the tensile strength is preferably 10 MPa or less from the viewpoint of the moldability of the outer package 7.

  Next, the exterior body 17 according to the second embodiment of the present invention will be described with reference to the drawings. In addition, about the same component as the exterior body 7 which concerns on 1st Embodiment, it demonstrates using the same code | symbol.

  In the exterior body 7 according to the first embodiment, the inclined portion 33 has a round chamfered shape represented by a curve in a side sectional view from the longitudinal direction x. Instead, this is shown in FIG. As described above, in the exterior body 17 according to the second embodiment, the inclined portion 43 has a chamfered shape represented by a substantially straight line in a side sectional view from the longitudinal direction x. Therefore, the inclined portion 43 has a shape in which the corner portion of the end portion of the inner surface 32 of the accommodating portion 3 is linearly dropped.

  Even if the inclined portion 43 has a square chamfered shape, a wire accommodated in the accommodating portion 3 at the end portion of the accommodating portion 3 even if a thermoplastic resin foam sheet is used as the base material of the exterior body 17 as in the round chamfered shape. It is possible to prevent the sheath of the wire harness from being damaged by hitting the harness. Further, since the inclined portion 43 is formed, even when the wire harness hits the end portion of the housing portion 3 when the wire harness is disposed in the housing portion 3, the wire harness covering or conductor is damaged. Can be prevented.

  The inclination angle α of the chamfered shape with respect to the inner surface 32 of the housing portion 3 is not particularly limited, but even if a wire harness (not shown in FIG. 4) hits the end of the housing portion 3, The range of 30 ° or more and 60 ° or less is preferable, and the range of 40 ° or more and 50 ° or less is particularly preferable from the viewpoint of more reliably preventing the conductor from being damaged. That is, the angle formed by the inner surface 32 of the housing portion 3 and the inclined portion 43 is preferably 120 ° or more and 150 ° or less, and particularly preferably 130 ° or more and 140 ° or less. As shown in FIG. 4, the chamfered straight line may be formed by a single straight line having a constant inclination angle α, and instead of this, a combination of a plurality of straight line portions having different inclination angles α. May be formed.

  Although the range of the inclined part 43 of the exterior body 17 is not specifically limited, From the point which prevents more reliably that the coating | cover and conductor of a wire harness will be damaged like the exterior body 7 which concerns on the example of 1st Embodiment. The range of 30% or more of the thickness of the thermoplastic resin foam sheet in the end face portion 31 is preferable, and the range of 50% or more is particularly preferable. In addition, also in the exterior body 17, as in the exterior body 7 according to the first embodiment, about 50% of the thickness of the thermoplastic resin foam sheet in the end surface portion 31 is the inclined portion 43.

  As shown in FIG. 4, in the exterior body 17, similarly to the exterior body 7 according to the first embodiment, the end surface portion 31 is further provided with an uneven portion 35 that is uneven in the longitudinal direction x. Therefore, even in the exterior body 17, the wire harness can be smoothly arranged in the housing portion 3.

  Next, a method for forming an exterior body according to an embodiment of the present invention and a method for forming a wire harness with an exterior body by mounting the wire harness on the exterior body will be described. Here, a method for forming the exterior body 7 according to the first embodiment example and a method for forming the wire harness 1 with the exterior body by attaching the wire harness 5 to the exterior body 7 according to the first embodiment example will be described as examples. To do.

  In the method of forming the exterior body 7, first, a cutting process is performed in which a portion corresponding to the exterior body 7 is cut out from a thermoplastic resin foam sheet that is a base material for forming the exterior body 7. Examples of the cutting process include punching with a Thomson blade mold. When punching with a Thomson blade mold, a round chamfered shape corresponding to the inclined portion 33 (for example, R 0.05 mm or more and 10.0 mm or less) is formed on the cut surface of the thermoplastic resin foam sheet by appropriately setting the shape of the blade. And the concavo-convex portion 35 can be formed. In addition to the cutting process, after the cutting process, a chamfering process for forming a round chamfered shape may be performed on the cut surface of the thermoplastic resin foam sheet. Concave and convex processing may be performed on the cut surface of the plastic resin foam sheet. Examples of the uneven processing means include cutting and grinding.

  In the method of mounting the exterior body 7 formed as described above to the wire harness 5, first, the bent portions 20 a and 20 b are bent so that the side wall portions 22 and 23 are substantially perpendicular to the bottom wall portion 21. . When bent at the bent portions 20a and 20b, a shape is formed in which the space between the front end of the side wall portion 22 and the front end of the side wall portion 23 opens upward along the longitudinal direction x.

  After bending the bent portions 20a and 20b, the bent portion 20c is bent so that the upper wall portion 24 is substantially parallel to the bottom wall portion 21. Next, the bent portion 20 d is bent so that the lid wall portion 25 is substantially parallel to the bottom wall portion 21. When the lid wall portion 25 is bent by the bent portion 20d, the opening between the end portions of the side wall portions 22 and 23 is closed to form the accommodating portion 3. Next, by inserting the locking pieces 251a to 251h into the locking holes 201a to 201h, respectively, and fitting the locking pieces 251a to 251h, the state where the opening between the end portions of the side walls 22 and 23 is closed is fixed. The exterior body 7 is assembled.

  Next, the exterior body 7 is attached to the outer periphery of the wire harness 5 by inserting the wire harness 5 from the end surface 31 on one side of the housing portion 3 of the assembled exterior body 7 into the housing portion 3 and housing it. .

  Further, instead of inserting the wire harness 5 into the assembled exterior body 7, after bending the bent portions 20 a and 20 b, the wire harness 5 is placed on the bottom wall portion 21 and then the bottom wall portion 21. The upper wall portion 24 is bent at the bent portion 20c so as to be substantially parallel to the bottom wall portion 21 and is bent at the bent portion 20d so that the lid wall portion 25 is substantially parallel to the bottom wall portion 21. 3, and the wire harness 5 may be inserted into the housing 3.

  In addition, the exterior body 7 may be attached to the outer periphery of a fixing tape for fixing the plurality of wires constituting the wire harness 5 so as not to be dispersed, and the plurality of wires not using the fixing tape. It may be attached to the outer periphery. Moreover, the exterior body 7 may be attached to the outer periphery of one electric wire.

  In the exterior body 17 according to the second embodiment, after the exterior body 17 is cut out, the inclined portion 43 is formed by chamfering the cut surface of the thermoplastic resin foam sheet to form a chamfered shape. Form.

  Next, another embodiment of the exterior body of the present invention will be described. In each of the above exemplary embodiments, the uneven portion that is uneven in the longitudinal direction x is formed on the entire end surface portion of the housing portion, but the uneven portion may not be formed, and the uneven portion is only formed on a part of the end surface portion. May be formed. Moreover, in each said embodiment, although the inclination part was a round chamfering shape or a square chamfering shape, it is good also as a shape which replaced with this and combined a round chamfering shape and a square chamfering shape.

  In each of the above embodiments, the inclined portion is formed in the entire circumferential direction of the end surface portion of the housing portion, but instead, the inclined portion may be formed only in a part of the circumferential direction.

  In the exterior body according to each of the above embodiments, the plurality of wall portions are linear along the extending direction (longitudinal direction x) of the wire harness, corresponding to the fact that the wire harness extends substantially linearly. However, instead of this, the plurality of wall portions may be branched along the shape of the wire harness in the middle of the extending direction, and so as to follow the shape of the wire harness. It may be bent. Moreover, the accommodating part may be diameter-expanded and diameter-reduced so that the shape of a wire harness may be followed.

  Further, in the exterior body according to each of the above-described embodiments, the cross-sectional shape in the short direction y of the exterior body is a substantially square shape, but the cross-sectional shape is not particularly limited, and for example, there are many triangles, pentagons, and the like. It may be square. Further, in the exterior body according to each of the above embodiments, the state in which the opening between the front end portions of the side wall portions is closed is fixed by fitting the locking pieces into the locking holes. Is not particularly limited, and the lid wall portion may be bonded and fixed to the upper wall portion, or may be fixed by another component that connects the lid wall portion and the upper wall portion.

  In the outer casing for electric wires of the present invention, even if a thermoplastic resin foam sheet is used as a base material, it is possible to prevent the covering of the electric wires and the conductor from being damaged by the end of the accommodating portion. The utility value is high in the field of the exterior body of a wire harness that is routed in an automobile requiring durability.

DESCRIPTION OF SYMBOLS 1 Wire harness with an exterior body 2 Wall part 3 Storage part 5 Wire harness 7, 17 Exterior body (exterior body for electric wires)
20a bent part 20b bent part 20c bent part 20d bent part 21 bottom wall part 22, 23 side wall part 24 upper wall part 25 lid wall part 33, 43 inclined part 35 uneven part

Claims (8)

A thermoplastic resin foam sheet is formed by bending, and is an electric wire outer package attached to the outer periphery of an electric wire,
An exterior body for electric wires, comprising an accommodating portion that accommodates the electric wire and extending along an extending direction of the electric wire, and an inclined portion that is inclined outward is formed at an inner surface end of the accommodating portion.   The electric wire exterior body according to claim 1, wherein the inclined portion has a round chamfered shape represented by a curve in a cross section.   The electric wire exterior body according to claim 1, wherein the inclined portion has a square chamfered shape represented by a straight line in a cross section.   The exterior body for electric wires according to claim 2, wherein the round chamfered shape has a curved portion of R 0.05 mm or more and 10.0 mm or less.   The wire outer package according to claim 3, wherein an inclination angle of the chamfered shape with respect to an inner surface of the housing portion is 30 ° or more and 60 ° or less.   The exterior body for electric wires according to any one of claims 1 to 5, wherein an uneven portion that is uneven in the longitudinal direction of the housing portion is formed at an end portion of the housing portion.   The exterior body for electric wires according to claim 6 whose distance between the peak parts of the convex part which adjoins said uneven part is less than 5.0 mm. A wire harness with an outer body,
One or more wires,
An electric wire outer package according to any one of claims 1 to 7,
The said exterior body for electric wires is a wire harness with an exterior body with which the outer periphery of the said electric wire is mounted | worn.

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