Exterior structure and wire harness equipped with said exterior structure

Abstract

To firmly protect an internal electric wire by keeping the abutting ends of adjacent divided bodies in a united state such that the divided bodies are not separated from each other.SOLUTION: A tubular body 2 surrounding an electric wire 3 has a pair of divided bodies 4 divided in the circumferential direction, engagement portions 11 and 21 are respectively provided in two abutment portions 5A and 5B where the ends of a pair of divided bodies 4 adjacent in the circumferential direction butt against each other, the engagement portions 11 and 21 are configured by an engagement piece 11 provided at one end and an engaged piece 21 provided at the other end of the first abutment portion 5A of the pair of divided bodies 4 so as to be engageable in the circumferential direction, and in the second abutment portions 5B of the pair of divided bodies 4, the engagement piece 11 provided at one end and the engaged piece 21 provided at the other end is configured so as to be engaged in the circumferential direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an exterior structure that surrounds the outside of an electric wire, and a wire harness including the exterior structure. [Background technology]

[0002] In general, a wire harness arranged in a vehicle is made up of a bundle of electric wires, and these electric wires are surrounded by an exterior member. By surrounding the electric wires with an exterior member, the wire harness ensures electromagnetic shielding performance, chipping resistance, waterproofing performance, etc. of the internal electric wires.

[0003] Incidentally, when the wire harness is routed along a long routing path, the exterior member generally tends to be long accordingly. In this way, when the outer casing is a long object, for example, when attaching the outer casing to the electric wire, it is necessary to insert the electric wire into the long outer casing, which takes time and may result in a decrease in manufacturing efficiency.

[0004] In order to solve such problems, Patent Document 1 discloses an exterior member that uses a shielded pipe formed by combining a pair of divided bodies that are split along the axial direction, thereby enabling the exterior member to be fitted to the electric wire without having to insert the electric wire inside the exterior member, thereby improving the exterior fitting work.

[0005] Specifically, the shield pipe of Patent Document 1 has a pair of adjacent segments in the cross-sectional circumferential direction, and a linearly protruding wrap fitting portion is formed at the butt end of one of the segments, and a concave groove portion is formed in the protruding direction of the wrap fitting portion at the butt end of the other segment.

[0006] The shield pipe of Patent Document 1 is configured such that the ends of a pair of split bodies are butted together, so that the lap fitting portion is fitted into the groove portion, and the pair of split bodies are joined together.

[0007] However, the shielded pipe in Patent Document 1 simply has the wrap fitting portion that protrudes linearly inserted into the groove and the butt ends fitted together, so if an external force is applied to the shielded pipe, there is a risk that the wrap fitting portion will come out of the groove and the fitting will be released.

[0008] In this case, in the shielded pipe of Patent Document 1, the internal electric wires may be exposed through a gap generated between the pair of divided bodies, and the internal electric wires may not be protected reliably. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Patent No. 6132206 Summary of the Invention [Problem to be solved by the invention]

[0010] The present invention aims to provide an exterior structure that can reliably protect the internal electric wires by keeping the butt ends of adjacent divided bodies in a combined state so that they do not separate from each other, and a wire harness equipped with the exterior structure. [Means for solving the problem]

[0011] The present invention relates to an exterior structure surrounding an outside of an electric wire, the exterior structure having a plurality of divided bodies divided in a cross-sectional circumferential direction, and an engagement portion is provided at abutting portions of ends of the divided bodies adjacent to each other in the cross-sectional circumferential direction, the engagement portion being an engagement piece provided on one of the adjacent divided bodies, and an engagement piece provided on the other divided body, the engagement piece Related and a mating engaged piece. A protruding portion is formed at the tip of the engaging piece so as to protrude toward one side in the inward / outward direction perpendicular to the axial direction of the electric wire, and an engaging recess is formed at the tip of the engaged piece so as to be recessed toward one side in the inward / outward direction and engage with the protruding portion when the adjacent divided bodies are combined, and the engaging piece and the engaged piece are formed so as to be flexible and deformable in the inward / outward direction. It is characterized by:

[0012] According to the above configuration, by engaging the ends of the adjacent segments in the circumferential direction, the ends can be kept firmly engaged so as not to separate from each other. Therefore, the internal electric wires can be securely protected. Furthermore, like an exterior structure that is integrally formed in a cylindrical shape, the exterior structure can easily surround the electric wires even without the electric wires being inserted therethrough.

[0013] As an aspect of the present invention, an inner surface of one of the divided bodies and an inner surface of the other of the divided bodies may be flush with each other in the circumferential direction of the cross section around the butted portion. According to the above configuration, the engaged piece and the engaging piece do not protrude toward the internal space of the divided body around the butt portion. In other words, the internal space is not invaded by the engaged piece and the engaging piece. Therefore, there is no risk of the electric wires in the internal space being damaged by contacting the inner surface of the divided body, and the electric wires inside can be securely protected.

[0014] In addition, since the internal space of the outer casing is not invaded by the engaged piece or the engaging piece, a large internal space can be secured, and a larger number or thicker electric wires can be accommodated without increasing the outer diameter.

[0015] As a further aspect of the present invention, the divided body may be formed of a conductive material having electrical conductivity.

[0016] According to this configuration, the divided body can obtain an electromagnetic shielding effect. Here, the divided body may be made of a metal so long as it is a conductive material, or may be made of an insulating material (non-conductive material) that includes or contains a conductive material other than a metal.

[0017] However, it is preferable to form the divided body from a metal among conductive materials, since this makes it easier to ensure rigidity against external forces such as chipping.

[0018] As a further aspect of the present invention, the divided body may be made of an insulating resin.

[0019] According to the above-mentioned configuration, even if there is electrical contact with surrounding electric devices, electric wires, or conductive members such as terminal fittings attached thereto, no adverse effects are exerted on these conductive members.

[0020] Furthermore, since the divided body is made of resin, the divided body provided with the engaged piece and the divided body provided with the engaging piece can be easily formed by resin molding.

[0021] As a further aspect of the present invention, the divided body may have a conductive layer. The divided body can obtain an electromagnetic shielding effect by the conductive layer.

[0022] As a further aspect of the present invention, the conductive layer may be provided on at least one of a radially inner side and a radially outer side of the resin divided body. The above-mentioned radially inner and outer sides of the divided body indicate the radially inner or outer side with respect to the middle of the divided body in the thickness direction, and the conductive layer may be provided so as to face or not face the inner or outer surface of the divided body.

[0023] According to this invention, the conductive layers provided on at least one of the radially inner and outer sides of the divided bodies can be easily electrically connected between adjacent divided bodies, and by connecting the conductive layers to a ground circuit, an electromagnetic shielding effect can be provided for the surrounding electric wires.

[0024] Specifically, when the conductive layer is disposed on the radially inner side of the partition, the distance between the surrounded electric wires and the conductive layer is reduced, so that the conductive layer can be configured compactly to obtain an electromagnetic shielding effect. Conversely, when the conductive layer is disposed on the radially outer side, the distance between the surrounded electric wires and the conductive layer is increased, so that the influence of the incidence of electromagnetic waves from the external electric wires and the radiation of electromagnetic waves from the electric wires to the outside is reduced, so that a high shielding effect can be obtained.

[0025] As a further aspect of the present invention, the conductive layer may be provided inside the thickness of the resin divided body. The above-mentioned "inner wall thickness" of the divided body refers to the inner part in the thickness direction than the outer surface and inner surface of the divided body, and means that the conductive layer is provided inside in the thickness direction so as not to face the outer surface or inner surface of the divided body.

[0026] This invention makes it possible to prevent damage to the conductive layer, electrically connect the conductive layers provided on each divided body, and by connecting the conductive layers to a ground circuit, a stable electromagnetic shielding effect can be achieved for the electric wires that surround the exterior of the exterior structure.

[0027] As a further aspect of the present invention, an adhesive portion may be provided that adhesively bonds the divided bodies adjacent to each other in the circumferential direction of the cross section. The above-mentioned adhesive portion may be bonded so that the opposing opposing surfaces of the bonded divided bodies abut each other via an adhesive film, or an adhesive layer may be formed between the opposing surfaces and the opposing surfaces may be bonded to each other via the adhesive layer.

[0028] According to this invention, in an exterior structure in which the divided bodies are engaged with each other by the engaging portions to surround the electric wires, the engaging portions and the adhesive portions work together to join the divided bodies, so that a durable exterior structure can be constructed.

[0029] The present invention is also characterized in that a wire harness includes the above-mentioned exterior structure and the electric wire, the exterior structure surrounding an outside of the electric wire.

[0030] According to the above configuration, the butt ends of adjacent divided bodies are kept joined together so that they do not separate from each other, thereby providing an exterior structure that can reliably protect the internal electric wires. Effect of the Invention

[0031] According to the present invention, it is possible to provide an exterior structure that can reliably protect the internal electric wires by keeping the butt ends of adjacent divided bodies in a combined state so that they do not separate from each other, and a wire harness equipped with the exterior structure. [Brief description of the drawings]

[0032] [Figure 1] 1 is a perspective view showing a main part of a wire harness according to an embodiment of the present invention, partially in cross section. [Diagram 2] An enlarged cross-sectional view taken along line AA in FIG. [Diagram 3] FIG. 3 is an enlarged view of the main part of FIG. 2. [Figure 4] 11A to 11C are cross-sectional views showing an example of a procedure for joining a pair of divided bodies together. [Diagram 5] 1 of the wire harness of modified example 1, (a2) is a diagram corresponding to FIG. 2, (b1) is a diagram corresponding to FIG. 1 of the wire harness of modified example 2, and (b2) is a diagram corresponding to FIG. 2. [Figure 6] 1 of the wire harness of modified example 3, (a2) is a diagram corresponding to FIG. 2, (b1) is a diagram corresponding to FIG. 1 of the wire harness of modified example 4, and (b2) is a diagram corresponding to FIG. 2. [Figure 7] 3A is a diagram of a wire harness according to a fifth modified example, and FIG. 3B is a diagram of a wire harness according to a sixth modified example, and FIG. [Figure 8] FIG. 13 is a diagram of a wire harness according to a seventh modified example, which corresponds to FIG. [Figure 9] FIG. 13 is a diagram of a wire harness according to an eighth modified example, which corresponds to FIG. 2 . [Figure 10] FIG. 13 is a diagram of a wire harness according to a ninth modified example, the diagram corresponding to FIG. 2 . DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] An embodiment of the present invention will now be described with reference to the drawings. As shown in FIGS. 1 and 2, a wire harness 1 of this embodiment includes a plurality of electric wires 3 (two in this example) and a tubular body 2 as an exterior member surrounding the plurality of electric wires 3. In the drawing, arrow X indicates the axial direction of the tubular body 2, arrow Y indicates the radial direction of the tubular body 2, and arrow Z indicates the circumferential direction of the tubular body 2. In the following description, the inner side in the radial direction may be abbreviated as the radially inner side, and the outer side in the radial direction may be abbreviated as the radially outer side.

[0034] Although not shown, the wire harness 1 of this embodiment is a high-voltage wire harness that connects a battery and a motor in an electric vehicle or a hybrid vehicle, and is arranged, for example, in an underfloor panel of the vehicle. Note that, although the wire harness 1 connects a battery and a motor in this embodiment, the present invention is not limited to this.

[0035] Two (a pair of) electric wires 3 are arranged so that the distance between them is substantially constant along the longitudinal direction, i.e., substantially in parallel. As shown in Fig. 1 and Fig. 2, these two electric wires 3 are collectively surrounded by a tubular body 2. In this embodiment, the two electric wires 3 have the same structure and size, so the description will be given based on one of the electric wires 3.

[0036] The electric wire 3 is a high-voltage electric wire capable of handling high voltage and large current, and as shown in FIG. 2, is composed of a conductor portion 31 formed by bundling a plurality of conductive core wires, and an insulating coating portion 32 having insulating properties and covering the entire outer periphery of the conductor portion 31.

[0037] Although not shown, terminal fittings are attached to both ends of the electric wire 3 in the longitudinal direction (axial direction), and the vicinity of the ends extends from the tubular body 2. The terminal fitting provided at one end of the electric wire 3 in the longitudinal direction is connected to a predetermined terminal attachment portion (not shown) of a connector or the like provided on the battery side. Meanwhile, the terminal fitting provided at the other end of the electric wire 3 in the longitudinal direction is connected to a predetermined terminal attachment portion (not shown) of a connector or the like provided on the motor side.

[0038] The portions of the electric wire 3 extending from both ends of the tubular body 2 may be covered with a cylindrical braided wire (not shown) serving as a flexible conductive member. When this configuration is applied, the braided wire may be, for example, a copper wire that has been tin-plated, that is, a braided member formed by braiding tin-plated copper wires. However, the braided wire is not limited to a braided member formed by braiding tin-plated copper wires as described above, but may be an unplated one or another metal type such as aluminum (i.e., an aluminum braided wire formed by braiding aluminum wires).

[0039] The tubular body 2 is a cylindrical pipe having an inner diameter sufficient to surround multiple electric wires 3 (two in this example), and has a certain rigidity sufficient to protect the electric wires 3 from flying stones and the like while holding them along the wiring route.

[0040] The tubular body 2 is formed so that its cross-sectional view perpendicular to the axial direction (hereinafter referred to as "orthogonal cross-sectional view") is approximately circular, i.e., circular tubular, and is formed having multiple (two in this example) divided bodies 4 (4A, 4B).

[0041] The pair of divided bodies 4 are formed over the entire axial length such that an approximately circular shape is approximately divided into two equal parts, i.e., approximately semicircular, when viewed in orthogonal cross section. In this embodiment, the pair of divided bodies 4 are formed to have the same shape as each other. Furthermore, the pair of divided bodies 4 are formed to have the same shape when viewed in orthogonal cross section over the entire axial length.

[0042] The pair of divided bodies 4 are joined (fitted) together in a mutually opposing orientation such that both circumferential ends of each divided body 4 abut against both circumferential ends of the other divided body 4 . However, a pair of divided bodies 4 formed to have the same shape are not combined in a position facing each other so as to be line-symmetrical with respect to each other, but are combined in a position facing each other so as to be point-symmetrical with respect to each other.

[0043] In the following description, the portion where the ends of a pair of segments 4 butt against each other will be referred to as a "butt portion 5" as shown in Fig. 2. That is, the tubular body 2 has two butt portions 5. In the following description, one of these two butt portions 5 will be referred to as a "first butt portion 5A" and the other will be referred to as a "second butt portion 5B."

[0044] As shown in FIG. 2, the tubular body 2 is formed in a cylindrical shape with a substantially constant wall thickness around the entire circumference, including the two butt joints 5, and an aluminum layer 6 made of conductive aluminum is formed as a conductive layer at a substantially central position in the radial direction, over the entire circumference except for the butt joints 5.

[0045] The conductive layer is not limited to aluminum as in the aluminum layer 6 of this embodiment, and may be made of any suitable metal such as iron, copper, stainless steel, etc., depending on the location of the conductive layer, as long as the conductive layer is made of a conductive material. The conductive layer may be made of a material other than metal, such as graphite, for example.

[0046] In this embodiment, at least one end of the aluminum layer 6 of the tubular body 2 is grounded to a ground circuit via an earth wire or the like, although not shown. Specifically, although not shown, holes are provided at both axial ends of the tubular body 2, which are radially connected from the outer surface of the tubular body 2 to the aluminum layer 6, and one end of the earth wire is electrically connected to the aluminum layer 6 while being inserted into the hole. As described above, the aluminum layer 6 in this embodiment is divided in the circumferential direction of the tubular body 2 for each divided body 4, and therefore, although not shown, one end of the earth wire is electrically connected to the aluminum layer 6 provided for each divided body 4. As a result, the tubular body 2 ensures electromagnetic shielding of the internal electric wire 3 over approximately the entire circumference.

[0047] The portion of the tubular body 2 other than the aluminum layer 6 (referred to as a "tubular body main body 7") is made of resin. Each of the pair of divided bodies 4 is formed integrally with the resin tubular body main body 7 and the aluminum layer 6 by extrusion molding or the like.

[0048] As shown in FIGS. 1 to 3, each of the two butt joints 5 is provided with engagement portions 11, 21 that engage the butted ends of the pair of split bodies 4 with each other. Here, as shown in FIG. 2, the pair of divided bodies 4 are formed to have the same shape as each other, as described above, and are joined in a position in which they face each other so as to be point symmetrical.

[0049] For this reason, the first butt portion 5A and the second butt portion 5B are point symmetrical in an orthogonal cross-sectional view of the tubular body 2, and therefore, below, the configuration of the engaging portions 11, 21 provided at the butt portion 5 will be described based on the first butt portion 5A, as well as the state in which the pair of divided bodies 4 are combined (i.e., the state in which the engaging piece 11 and the engaged piece 21 are engaged with each other, as described below).

[0050] As shown in Figure 2, the engagement portions 11, 21 provided in the first butt portion 5A are composed of an engagement piece 11 provided at an end 5Aa (referred to as "one side end 5Aa") of one of the pair of partitions 4, 4A, and an engaged piece 21 provided at an end 5Ba (referred to as "the other side end 5Ab") of the other partition 4B.

[0051] The engaging piece 11 and the engaged piece 21 are disposed on the inner and outer radial sides of the first butt portion 5A, and each of them is formed to protrude toward the end of the other side in the circumferential direction. The engaging piece 11 and the engaged piece 21 are configured to be mutually engageable in the circumferential and radial directions.

[0052] 3, of the engagement portions 11, 21 provided in the first butt portion 5A, the engagement piece 11 protrudes from a radially inner portion of one end portion 5Aa of one divided body 4A to an end face 5Ab1 of a radially inner portion of the other end portion 5Ab. A base portion 12 of the engagement piece 11 is formed to have a thickness slightly thinner than approximately half the thickness of the butt portion 5.

[0053] A radially outer protruding portion 131 that protrudes radially outward beyond the base portion 12 of the engagement piece 11 is integrally formed at the tip portion 13 of the engagement piece 11. The radially outer protruding portion 131 protrudes radially outward beyond the radial middle position of the first butt portion 5A, and is formed to protrude radially outward from the radial outer surface of the base portion 12 of the engagement piece 11 in a stepped shape.

[0054] The radially outer protruding portion 131 has a tapered outer surface 131a so that the radially outward protruding length gradually decreases from the step portion 131b toward the tip side, that is, so that the tip portion 13 of the engagement piece 11 has an acute angle toward the tip 11t. The tip 11t of the engaging piece 11 is formed to have substantially the same thickness as the base portion 12 of the engaging piece 11.

[0055] A radially inner portion of one end 5Aa of the first butt portion 5A is formed by such an engagement piece 11. The engagement piece 11 is formed so that a tip 11t in the protruding direction abuts against an end face 5Ab1 of the radially inner portion of the other end 5Ab.

[0056] A part of the inner peripheral surface 4Aa of one divided body 4A, i.e., the inner peripheral surface of the first butt portion 5A, is formed by the radial inner surface 11a of the engagement piece 11. The engagement piece 11 is formed to protrude in an arc shape along the inner peripheral surface 4Ba of the other divided body 4B, i.e., along the circumferential direction of the other divided body 4B. The radial inner surface 11a of the engagement piece 11 and the radial inner surfaces (4Aa, 4Ba) of the pair of divided bodies 4 at the portions adjacent to the engagement piece 11 in the circumferential direction are formed to be flush with each other.

[0057] 3, of the engaging portions 11, 21 provided in the first butting portion 5A, the engaged piece 21 protrudes from the radially outer portion of the other end portion 5Ab of the other divided body 4B toward the end face 5Aa1 of the radially outer portion of the one end portion 5Aa. The engaged piece 21 is formed to protrude in an arc shape along the outer peripheral surface 4Ab of the one divided body 4A and the radially outer surface 11b of the engaging piece 11, i.e., along the circumferential direction of the one divided body 4A.

[0058] The radially outer portion of the other end 5Ab of the first butt portion 5A is formed by the engaged piece 21. The engaged piece 21 is formed such that a tip 21t in the protruding direction faces an end face 5Aa1 of the radially outer portion of the one end 5Aa across a gap in the circumferential direction. This gap is formed as a vertical groove 51 that extends radially and opens toward the radially outer side (the outside of the tube state).

[0059] The engaged piece 21 is formed with a thickness that is approximately half the thickness of the butt portion 5. As a result, the radial inner surface at the tip portion 22 of the engaged piece 21 is formed to face the radial outer surface at the base portion 12 of the engaging piece 11 with a gap in the radial direction. This gap is formed as a circumferentially extending lateral groove 52. The lateral groove 52 corresponds to approximately the radial middle position of the first butt portion 5A.

[0060] The vertical groove 51 and the horizontal groove 52 are formed in an L-shape in an orthogonal cross section, with the radial inner end of the vertical groove 51 communicating with the circumferential end of the horizontal groove 52 on the side of one of the divided bodies 4A. An adhesive 61 is filled in the horizontal groove 52 and the vertical groove 51, forming an adhesive portion 60.

[0061] The adhesive portion 60 bonds the butted ends of the first butt portion 5A, i.e., one side end 5Aa and the other side end 5Ab, and ensures watertightness of the gap between the butted ends (the vertical grooves 51 and the horizontal grooves 52).

[0062] The base 23 of the engaged piece 21 has an engagement recess 24 formed therein, which is recessed radially outward from the radial inner surface of the base 23 of the engaged piece 21. The engagement recess 24 is formed in a recessed shape radially outward from the radial middle position of the first butt portion 5A, and is formed in a stepped shape recessed radially outward in response to the radially outward protruding shape of the radially outer protruding portion 131 provided at the tip 13 of the engaging piece 11.

[0063] As a result, the radially outer protrusion 131 of the engaging piece 11 is formed to fit snugly into the engaging recess 24 of the engaged piece 21. Then, when the radially outer protrusion 131 is fitted into the engaging recess 24, the stepped edge 24a of the engaging recess 24 and the stepped portion 131b of the radially outer protrusion 131 come into contact with each other, thereby engaging with each other in the circumferential direction. Furthermore, the tapered radial inner surface 24b of the engaging recess 24 and the tapered radial outer surface 131a of the radially outer protrusion 131 come into contact with each other, thereby engaging with each other in the circumferential direction and the radial direction.

[0064] A part of the outer peripheral surface 4Bb of the other divided body 4B, i.e., the outer peripheral surface of the first butting portion 5A, is formed by the radial outer surface 21b of the engaged piece 21. Furthermore, the radial outer surface 21b of the engaged piece 21 and the radial outer surfaces (4Ab, 4Bb) of the pair of divided bodies 4 that are adjacent to the engaged piece 21 in the circumferential direction are formed to be flush with each other. The engaging piece 11 and the engaged piece 21 are formed so as to be able to be engaged with each other in the circumferential direction and the radial direction from a state where they are separated from each other, and to be able to be bent and deformed in the radial direction.

[0065] As shown in Figures 2 and 3, the aluminum layer 6 is formed at approximately the radial center position of the tubular body 2, i.e., at a location radially coinciding with the lateral groove 52, and has approximately the same thickness as the lateral groove 52. However, since the radially outer protrusion 131 of the engagement piece 11 is positioned so as to cross approximately the radial middle position of the tubular body 2 from the radial inside to the radial outside, the aluminum layer 6 and the lateral groove 52 are not formed on the radially outer protrusion 131 (see Figures 2 and 3).

[0066] Next, an example of a procedure for joining the pair of divided bodies 4 together while surrounding the electric wire 3 will be described. The worker applies adhesive 61 to at least one of the one end 5Aa and the other end 5Ab of the first butt portion 5A (see FIG. 4(a)). Similarly, the worker applies adhesive 61 to at least one of the one end 5Ba and the other end 5Bb of the second butt portion 5B (see FIG. 4(a)). FIG. 4(a) illustrates an example in which adhesive 61 is applied only to one end 5Aa and the other end 5Bb of one divided body 4a of the pair of divided bodies 4.

[0067] In addition, the worker may inject adhesive 61 into the vertical groove 51 and the lateral groove 52 from the radial outer end of the vertical groove 51 after combining the pair of divided bodies 4. However, as described above, by applying adhesive 61 in advance to the forming surfaces of the lateral groove 52 and the vertical groove 51 before combining the pair of divided bodies 4, the adhesive 61 can be filled into the lateral groove 52 and the vertical groove 51 without any gaps when the pair of divided bodies 4 is combined.

[0068] 4(b), the pair of divided bodies 4 are opposed to each other in a point-symmetrical posture. Specifically, the pair of divided bodies 4 can be arranged so that the engaging piece 11 provided at one end 5Aa of the first butt portion 5A and the engaged piece 21 provided at the other end 5Ab face each other, and the engaged piece 21 provided at one end 5Ba of the second butt portion 5B and the engaging piece 11 provided at the other end 5Bb face each other. At this time, the worker places the pair of divided bodies 4 facing each other with the two electric wires 3 interposed between them.

[0069] Next, as shown in Figure 4(c), the worker brings the pair of divided bodies 4 close to each other so that one side end 5Aa and the other side end 5Ab of the first butt joint portion 5A are butted together and one side end 5Ba and the other side end 5Bb of the second butt joint portion 5B are butted together (see the thick arrows in Figure 4(c)).

[0070] At this time, as shown in Fig. 4(d), which shows an enlarged portion of Fig. 4(c), the radially outward protrusion 131 of the engaging piece 11 abuts against the tip end 22 of the engaged piece 21, and the pair of divided bodies 4 approach each other while the engaging piece 11 is bent and deformed radially inward. Then, as shown in Figs. 2 and 3, the radially outward protrusion 131 of the engaging piece 11 fits into the engaging recess 24 of the engaged piece 21, so that the engaging piece 11 and the engaged piece 21 engage with each other in the circumferential and radial directions, and a horizontal groove 52 and a vertical groove 51 are formed in each of the first butt portion 5A and the second butt portion 5B (see Fig. 3).

[0071] Since adhesive 61 has been applied in advance to each of the first butt portion 5A and the second butt portion 5B as described above, the lateral groove 52 and the vertical groove 51 are filled with adhesive 61, as shown in FIG. 3, and one side end portion 5Aa and the other side end portion 5Ab of the first butt portion 5A, and one side end portion 5Ba and the other side end portion 5Bb of the second butt portion 5B are bonded to each other via the adhesive 61 (bonding portion 60). This allows the pair of split bodies 4 to be joined together while surrounding the electric wire 3.

[0072] Furthermore, as described above, by electrically connecting an earth wire (not shown) to the aluminum layer 6 provided on each of the pair of divided bodies 4 at both ends of the tubular body 2, the tubular body 2 can obtain an electromagnetic shielding effect for the internal electric wire 3.

[0073] As shown in Figures 1 to 3, the tubular body 2 of the above-mentioned embodiment is an exterior structure that surrounds the outside of the electric wire 3, and has a pair of divided bodies 4 divided in the circumferential direction, and is provided with engagement portions 11, 21 at each of two butt portions 5 (a first butt portion 5A and a second butt portion 5B) where the ends of a pair of adjacent divided bodies 4 in the circumferential direction are butted against each other.

[0074] 2 and 3, the engaging portions 11, 21 provided at the first butt portion 5A are composed of an engaging piece 11 provided at one divided body 4A and an engaged piece 21 provided at the other divided body 4B, which engages with the engaging piece 11 in the circumferential direction. Furthermore, as shown in Fig. 2, the engaging portions 11, 21 provided at the second butt portion 5B are composed of an engaged piece 21 provided at one divided body 4A and an engaging piece 11 provided at the other divided body 4B, which engages with the engaged piece 21 in the circumferential direction.

[0075] According to the above configuration, even if an external force acts on the tubular body 2 of this embodiment in the opposite direction (separation direction) to the direction in which the pair of split bodies 4 butt each other at each of the two butt portions 5 during, for example, exterior installation work in which the electric wires 3 arranged along the wiring path of the wire harness 1 are surrounded from the outside, the engaging piece 11 and the engaged piece 21 engage circumferentially at each of the two butt portions 5 (first butt portion 5A and second butt portion 5B) of the pair of split bodies 4, so that the butted ends at each of the two butt portions 5 can be kept firmly engaged so as not to separate.

[0076] As a specific example of the above-mentioned exterior mounting work of the tubular body 2, there may be mentioned a work of bending the tubular body 2 along the wiring path of the wire harness 1 using a known pipe bender. Therefore, the electric wires 3 routed along the routing path of the wire harness 1 can be protected by the tubular body 2.

[0077] Furthermore, since the tubular body 2 of this embodiment is composed of a pair of divided bodies 4, it is not necessary to insert the electric wire 3 therethrough as in a tubular body that is integrally formed in the circumferential direction, and therefore the electric wire 3 can be easily wrapped around the tubular body even if it is made long.

[0078] As shown in Figs. 2 and 3, in the orthogonal cross section, at the butt joint 5, an inner peripheral surface 4Aa of one divided body 4A and an inner peripheral surface 4Ba of the other divided body 4B are flush in the circumferential direction. According to the above configuration, at the butt portion 5, the engaging piece 11 and the engaged piece 21 do not protrude toward the internal space in which the electric wire 3 is housed. In other words, the internal space is not invaded by the engaging piece 11 and the engaged piece 21. Therefore, there is no risk of the electric wire 3 housed in the internal space being damaged by contacting the inner circumferential surfaces 4Aa, 4Ba of the divided body 4, and the electric wire 3 inside can be securely protected.

[0079] In addition, since the internal space is not invaded by the engaging piece 11 or the engaged piece 21, a large internal space can be secured, and a larger number or thicker electric wires 3 can be accommodated without increasing the size of the tubular body 2.

[0080] As shown in Figs. 1 to 3, the tubular body main body 7 which is the main part of the divided body 4 in this embodiment is made of insulating resin. According to the above configuration, even if the tubular body 2 comes into electrical contact with conductive members such as electrical equipment or electric wires arranged around the tubular body 2, or terminal fittings attached thereto, it does not have any adverse effect on these conductive members.

[0081] Furthermore, according to the above-described configuration, the divided body 4 provided with the engaging piece 11 and the engaged piece 21 can be easily formed by resin molding. As shown in FIGS. 1 to 3, the divided body 4 of this embodiment has an aluminum layer 6 as a conductive layer.

[0082] According to the above-mentioned configuration, the aluminum layer 6 of the divided body 4 can provide an electromagnetic shielding effect for the electric wire 3 housed therein.

[0083] As shown in Figs. 1 to 3, the tubular body 2 of this embodiment is provided with adhesive parts 60 that adhesively bond the pair of divided bodies 4 together. According to the above configuration, the butt joints 5 of a pair of divided bodies 4 are engaged with each other by the engaging portions 11, 21, and in the tubular body 2 surrounding the outside of the electric wire 3, the engaging portions 11, 21 cooperate with the adhesive portion 60 to join the pair of divided bodies 4, thereby constructing a durable exterior structure.

[0084] More specifically, in electric vehicles and hybrid vehicles, a high-voltage wire harness (hereinafter referred to as a "high-voltage harness") has traditionally been used to transmit large amounts of power to high-voltage components, and the high-voltage wire harness is often routed under the vehicle floor.

[0085] The tubular body 2 provided in the wire harness 1 of this embodiment used as such a high-voltage harness has electromagnetic shielding performance, and as described above, can form a durable exterior structure and therefore can also satisfy chipping resistance performance.

[0086] Furthermore, since high-voltage harnesses are often routed under the vehicle floor, the exterior members provided on the high-voltage harnesses tend to be long. However, as described above, the tubular body 2 of this embodiment adopts a split structure consisting of a pair of split bodies 4, which makes it possible to easily surround the outside of the electric wires 3 without the need for wire insertion work.

[0087] In addition, in the tubular body 2 of this embodiment, gaps (vertical grooves 51 and horizontal grooves 52) are formed at the butt joints 5 of the pair of segments 4, so that the pair of segments 4 can be combined without being gouged out. Also, adhesive 61 is filled into the gaps (vertical grooves 51 and horizontal grooves 52) at the butt joints 5 to form adhesive parts 60. Therefore, the tubular body 2 of this embodiment can satisfy waterproof performance that prevents water from entering the inside through the gaps at the butt joints 5 of the pair of segments 4, even though it employs a divided structure.

[0088] Furthermore, if a conventional method, such as welding, is used to join a pair of divided bodies, there is a concern that the equipment will become large-scale and that sufficient consideration will need to be given to the safety of workers.

[0089] In contrast, the tubular body 2 of this embodiment engages with the pair of divided bodies 4 at the butt joint 5 by the engagement portions 11, 21, and only requires forming an adhesive portion 60 in the gap at the butt joint 5, making it easier to prepare equipment and ensure safety for workers during production.

[0090] The present invention is not limited to the configurations of the above-described embodiments, but can be formed in various embodiments. The tubular body of the present invention is not limited to a configuration having a pair of divided bodies 4 divided into two equal parts in the circumferential direction, like the tubular body 2 of the embodiment described above, but may also be configured to have three divided bodies 4 (4A, 4B, 4C) divided into three equal parts in the circumferential direction, like the tubular body 2A of modified example 1 shown in Figures 5 (a1) and (a2).

[0091] Needless to say, the tubular body of the present invention may be configured to include a plurality of divided bodies 4 each having a shape divided into four or more equal parts in the circumferential direction. Furthermore, the tubular body of the present invention is not limited to a configuration including a plurality of divided bodies 4 each having a shape divided equally in the circumferential direction as described above, and may be configured to include a plurality of divided bodies each having a shape divided so that the circumferential lengths are different from each other, although this is not shown in the drawings.

[0092] Furthermore, the tubular body of the present invention is formed in a perfect circular shape when viewed in orthogonal cross section, but is not limited thereto, and may be formed in, for example, an elliptical shape, an oval shape, or a polygonal shape such as a square shape.

[0093] When the tubular body is formed to have a quadrangular shape when viewed in orthogonal cross section, it can be formed, for example, into a square shape like the tubular body 2B of modified example 2 shown in Figures 5(b1) and (b2), a rectangular shape like the tubular body 2C of modified example 3 shown in Figures 6(a1) and (a2), or a trapezoidal shape (not shown).

[0094] In Figure 5 (b2), the two butt joints 5 are preferably provided in the middle of specific opposing sides 71, 73 of the four sides (71-74) (straight lines) that form a square shape when viewed in orthogonal cross section, since this allows the pair of divided bodies 4A, 4B to have the same shape, but they may also be provided in other locations, such as corners.

[0095] In FIG. 6(a2), the two butt joints 5 are provided on mutually opposing short sides 76, 78 of the four sides (75-78) (straight line portions) that form a rectangular shape in an orthogonal cross section.

[0096] Since the short sides 76, 78 are more rigid (less likely to bend) than the long sides 75, 77, providing the two butt joints 5 on the short sides 76, 78 can prevent the engagement between the engaging piece 11 and the engaged piece 21 from being accidentally released. However, it goes without saying that the two butt joints 5 are not limited to being provided on the short side portions 76, 78, but may also be provided on the long side portions 75, 77, or at other portions such as corner portions.

[0097] When the tubular body of the present invention is formed into an elliptical shape when viewed in orthogonal cross section, for example, the two butt portions 5 can be provided on a semicircular arc portion 81, as shown in Figures 6(b1) and 6(b2).

[0098] Since the semicircular portion 81 has higher rigidity (is less likely to bend) than the straight side portion 82, by providing the two butt portions 5 on the semicircular portion 81, it is possible to prevent the engagement between the engaging piece 11 and the engaged piece 21 from being accidentally released. However, needless to say, the two butt joints 5 are not limited to being provided on the semicircular arc portion 81, but may also be provided on other portions such as the straight side portion 82 or a corner portion (the boundary portion between the semicircular arc portion 81 and the straight side portion 82).

[0099] In the embodiment described above, the vertical groove 51 and the horizontal groove 52 are formed in each of the first butted portion 5A and the second butted portion 5B as a gap between the butted ends.

[0100] According to this configuration, the adhesive 61 (adhesive portion 60) filled in the vertical groove 51 and the horizontal groove 52 can provide good watertightness in the gap between the butted ends, as well as good adhesion between the butted ends, even when circumferential and radial external forces are applied to the butt portion 5.

[0101] However, as a modified example, in each of the first butt portion 5A and the second butt portion 5B, a configuration in which either a vertical groove 51 or a horizontal groove 52 is formed in the gap between the butted ends may be adopted.

[0102] Specifically, FIG. 7(a) shows a tubular body 2D according to a fifth modified example in which only a vertical groove 51 is formed as a gap between the butted ends in the first butted portion 5A. According to this configuration, since there is no lateral groove 52 radially between the base 12 of the engaging piece 11 and the tip 22 of the engaged piece 21, the base 12 and the tip 22 abut against each other radially without any gap, thereby increasing the circumferential engagement force between the engaging piece 11 and the engaged piece 21.

[0103] FIG. 7(b) shows a tubular body 2F according to a sixth modified example, in which only a lateral groove 52 is formed as a gap between the butted ends in the first butted portion 5A. According to this configuration, in addition to the circumferential engagement force between the engaging piece 11 and the engaged piece 21, Since the end face 5Aa1 of the radially outer portion of the one end portion 5Aa abuts against the tip 21t of the engaged piece 21 in the circumferential direction, the engaging force in the circumferential direction can be increased accordingly.

[0104] Moreover, since the lateral grooves 52 of this modified example 6 do not communicate with the outside of the tubular body 2 via the vertical grooves 51, the adhesive 61 filled in the lateral grooves 52 is not exposed to the outside of the tubular body 2. Therefore, the durability of the adhesive 61 can be maintained.

[0105] Needless to say, the present invention does not exclude a configuration in which neither the vertical groove 51 nor the horizontal groove 52 is formed in the gap between the butted ends of each of the first butt joint portion 5A and the second butt joint portion 5B (not shown).

[0106] In addition, the engaging portions 11, 21 in the above-described embodiment are formed, for example, at the first butt portion 5A so that the engaging piece 11 is protruded circumferentially toward the opposing end portion so that the engaged piece 21 is arranged radially inward and outward from one side end portion 5Ba and the engaged piece 21 is arranged radially inward and outward from the other side end portion 5Bb (see Figures 2 and 3).

[0107] However, the engaging portion of the present invention is not limited to this embodiment, and may be configured, for example, as in the tubular body 2G of modified example 7 shown in Figure 8, in which the first butt portion 5A is formed so as to protrude with the engaged piece 21 arranged radially inward and the engaging piece 11 arranged radially outward.

[0108] According to the above configuration, as in the above-described embodiment, the radially outer end of the vertical groove 51 does not open toward the radially outer side (outside the tubular body 2) (see FIG. 8), so that the adhesive 61 (adhesive portion 60) filled in the vertical groove 51 and the horizontal groove 52 does not fall out from the radially outer end of the vertical groove 51 to the outside of the tubular body 2, and as described above, the durability of the adhesive 61 can be maintained.

[0109] Furthermore, in the above-described embodiment, the aluminum layer 6 as a conductive layer is formed at approximately the radial middle position of the tubular body 2, but this configuration is not limited to this, and the aluminum layer 6 may be provided, for example, radially inward from approximately the radial middle position of the tubular body 2H, as in the tubular body 2H of modified example 8 shown in Figure 9.

[0110] Specifically, as in the tubular body 2H shown in Figure 9, the aluminum layer 6 is provided continuously over the entire circumferential length on the radially inner side of the tubular body 2 at the first butt portion 5A and the second butt portion 5B so as to pass through the engaging piece 11 located radially inner than the engaged piece 21.

[0111] Furthermore, as in the tubular body 2H shown in Figure 9, the aluminum layer 6 is located inside the wall thickness of the tubular body 2H, i.e., on the radially inner side of the tubular body 2H, but is not the innermost layer where the radial inner surface of the aluminum layer 6 becomes the inner circumferential surfaces 4Aa, 4Ba of the tubular body 2, but is located radially outside the innermost layer.

[0112] In this way, when the aluminum layer 6 is arranged radially inward, the distance between the surrounded electric wires 3 and the aluminum layer 6 is reduced, so that the aluminum layer 6 for obtaining an electromagnetic shielding effect can be configured compactly.

[0113] Alternatively, as in a tubular body 2I of a ninth modification shown in FIG. 10, the aluminum layer 6 as a conductive layer may be provided radially outward from the radial center position of the tubular body 2.

[0114] Specifically, as in the tubular body 2I of modified example 9 shown in Figure 10, the aluminum layer 6 is continuously provided over the entire circumferential length on the radial outside of the tubular body 2I at the first butt portion 5A and the second butt portion 5B so as to pass through the engaged piece 21 located radially outward of the engaging piece 11.

[0115] Furthermore, as in the tubular body 2I of modified example 9 shown in Figure 10, the aluminum layer 6 is located inside the wall thickness of the tubular body 2, i.e., on the radial outside of the tubular body 2, but is not the outermost layer such that the radial outer surface of the aluminum layer 6 becomes the outer peripheral surfaces 4Ab, 4Bb of the tubular body 2, but is located radially inward of the outermost layer.

[0116] In this way, when the aluminum layer 6 is positioned radially outward, the distance between the surrounded electric wire 3 and the aluminum layer 6 is increased, thereby reducing the effects of electromagnetic waves entering from the external electric wire and of electromagnetic waves being emitted from the electric wire 3 to the outside, thereby achieving a high electromagnetic shielding effect.

[0117] Moreover, the aluminum layer 6 provided on the tubular body 2H shown in Fig. 9 and the tubular body 2I shown in Fig. 10 is formed over the entire circumference of each of the tubular bodies 2H, 2I. That is, in each of the tubular bodies 2H, 2I, the aluminum layer 6 provided on one divided body 4A and the aluminum layer 6 provided on the other divided body 4B can ensure conductivity between the pair of divided bodies 4 when the divided bodies 4 are combined (i.e., are electrically connected to each other).

[0118] Therefore, when grounding both ends of the tubular bodies 2H, 2I to a ground circuit via an earth wire or the like, there is no need to electrically connect one end of the earth wire to the aluminum layers 6 provided on each of the pair of divided bodies 4.By electrically connecting the end of the earth wire to only one of the aluminum layers 6, the tubular bodies 2H, 2I can obtain an electromagnetic shielding effect for the internal electric wire 3 over the entire circumference.

[0119] Furthermore, by configuring the aluminum layer 6 to be provided inside the thickness of the resin divided body 4, either radially inward from the innermost layer or radially outward from the outermost layer, damage and oxidation can be prevented, and by electrically connecting the aluminum layers 6 provided on each divided body 4 to each other and connecting the aluminum layer 6 to a ground circuit, a stable electromagnetic shielding effect can be achieved for the electric wire 3 surrounding the outside of the tubular bodies 2H, 2I.

[0120] Furthermore, by forming the aluminum layer 6 on the inside or outside of the radially outer protrusion 131 in the radial direction of the split body 4, the radially outer protrusion 131 is not divided in the radial direction by the aluminum layer 6, and the radially outer protrusion 131 can be formed integrally with resin, thereby ensuring the strength of the radially outer protrusion 131.

[0121] The conductive layer of the present invention is not limited to being formed at any one of the middle part, the outside, and the inside in the radial direction of the tubular body, as in the aluminum layer 6 provided in the above-mentioned tubular bodies 2, 2H, and 2I, but may be formed over multiple layers. Furthermore, the tubular body of the present invention may be configured to be entirely formed of a conductive material, or conversely, may be configured to be entirely formed of a resin material without having a conductive layer.

[0122] Also, Figure 9 shows an example of a configuration in which the aluminum layer 6 is formed on the inside relative to the radial middle position of the tubular body 2H, and Figure 10 shows an example of a configuration in which the aluminum layer 6 is formed on the outside relative to the radial middle position of the tubular body 2I.

[0123] In other words, needless to say, the present invention may be configured in such a way that the features of the above-mentioned embodiments and modified examples are appropriately combined (not shown), for example, by applying a configuration in which the aluminum layer 6 is formed on the inside or outside of the radially middle position of the tubular bodies 2H, 2I as shown in Figures 9 and 10 to the tubular body 2A of modified example 1 shown in Figures 5(a1) and (a2).

[0124] The above-mentioned tubular body 2 is configured such that an engaging piece 11 is formed at one of both circumferential ends of each of the pair of divided bodies 4, and an engaged piece 21 is formed at the other end, so that the pair of divided bodies 4 are formed in the same shape. This is advantageous in that the tubular body 2 can improve the efficiency of parts management and assembly work. However, the tubular body of the present invention may also be configured such that, for example, engaging pieces 11 are formed at both ends of one divided body 4A, and engaged pieces 21 are formed at both ends of the other divided body 4B.

[0125] Although not specifically shown in the figure, an engaging piece 11 may be formed at one end 5Aa of the first butt portion 5A and an engaged piece 21 may be formed at the other end 5Ab, while an engaged piece 21 may be formed at one end 5Ba of the second butt portion 5B and an engaging piece 11 may be formed at the other end 5Bb.

[0126] The two electric wires 3 may be twisted pair electric wires formed by twisting them together. Needless to say, the wire harness 1 of the present embodiment includes two electric wires 3, but the wire harness of the present invention is not limited to two electric wires, and may include one electric wire or three or more electric wires. [Explanation of symbols]

[0127] 1...Wire harness 2,2A,2B,2C,2D,2E,2F,2G,2H,2I...Tubular body (exterior structure) 3...Electric wire 4...Divided body 4A...One of the divisions (either one of the divisions or the other division) 4B...The other divided body (the other divided body or either divided body) 4Aa…Inner surface of one of the divisions 4Ba…Inner surface of the other divided body 5…Butt joint 5A…First joint 5B…Second joint 5Aa, 5Ba...One side end (end of division body) 5Ab, 5Bb...other end portion (end portion of the divided body) 6...Aluminum layer (conductive layer) 11, 21...Engagement portion 11...Engagement piece 21...Engaged piece 60...Adhesive part

Claims

1. An exterior structure that surrounds the outside of an electric wire, The rotor has a plurality of divided bodies divided in a cross-sectional circumferential direction, An engagement portion is provided at abutting portions between ends of the divided bodies adjacent to each other in the cross-sectional circumferential direction, the engaging portion is composed of an engaging piece provided on one of the adjacent divided bodies and an engaged piece provided on the other divided body and engaged with the engaging piece, a protrusion is formed at a tip end of the engagement piece, the protrusion protruding toward one side in an inward / outward direction perpendicular to an axial direction of the electric wire; The tip portion of the engaged piece is recessed toward one side in the inward / outward direction and has an engagement recess with which the protruding portion engages when the adjacent divided bodies are combined, The engaging piece and the engaged piece are formed so as to be capable of being flexibly deformed in the inward and outward directions. Exterior structure.

2. The protrusion has a triangular shape with an acute angle at the tip side, the triangular shape being inclined toward the other side in the inward / outward direction as it approaches the tip side in the cross-sectional circumferential direction, when viewed from the axial direction, The engagement recesses are configured to receive the protrusions when the adjacent divided bodies are joined together. The exterior structure according to claim 1 .

3. In the periphery of the butted portion, an inner surface of one of the divided bodies and an inner surface of the other of the divided bodies are flush with each other in the circumferential direction of the cross section. The exterior structure according to claim 1 or 2.

4. The divided body is a conductive member having electrical conductivity. The exterior structure according to any one of claims 1 to 3.

5. The divided body is made of insulating resin. The exterior structure according to any one of claims 1 to 3.

6. The divided body has a conductive layer. The exterior structure according to claim 5.

7. The conductive layer is provided on at least one of the radially inner and outer sides of the resin divided body. The exterior structure according to claim 6.

8. The conductive layer is provided inside the thickness of the resin divided body. The exterior structure according to claim 6 or 7.

9. The exterior structure according to any one of claims 1 to 8 and the electric wire are provided, The exterior of the electric wire is surrounded by the exterior structure. Wire harness.

10. An exterior structure that surrounds the outside of an electric wire, The rotor has a plurality of divided bodies divided in a cross-sectional circumferential direction, An engagement portion is provided at abutting portions between ends of the divided bodies adjacent to each other in the cross-sectional circumferential direction, the engaging portion is composed of an engaging piece provided on one of the adjacent divided bodies and an engaged piece provided on the other divided body and engaged with the engaging piece, a protrusion is formed at a tip end of the engagement piece, the protrusion protruding toward one side in an inward / outward direction perpendicular to an axial direction of the electric wire; The tip portion of the engaged piece is recessed toward one side in the inward / outward direction and has an engagement recess with which the protruding portion engages when the adjacent divided bodies are combined, The engaging piece and the engaged piece are formed to be flexible and deformable in the inward and outward directions, The engaging piece is provided with an adhesive portion on one side of a peripheral surface in the inward / outward direction at a base end side of the protruding portion, the adhesive portion being attached to the other side of a peripheral surface in the inward / outward direction of the engaged piece when the adjacent divided bodies are combined. Exterior structure.

11. An exterior structure that surrounds the outside of an electric wire, The rotor has a plurality of divided bodies divided in a cross-sectional circumferential direction, An engagement portion is provided at abutting portions between ends of the divided bodies adjacent to each other in the cross-sectional circumferential direction, the engaging portion is composed of an engaging piece provided on one of the adjacent divided bodies and an engaged piece provided on the other divided body and engaged with the engaging piece, a protrusion is formed at a tip end of the engagement piece, the protrusion protruding toward one side in an inward / outward direction perpendicular to an axial direction of the electric wire; The tip portion of the engaged piece is recessed toward one side in the inward / outward direction and has an engagement recess with which the protruding portion engages when the adjacent divided bodies are combined, The engaging piece and the engaged piece are formed to be flexible and deformable in the inward and outward directions, The divided body has a high-rigidity portion having a higher rigidity than other portions, and the butt portion is provided in the high-rigidity portion. Exterior structure.

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