JP2009231004A - Wire harness - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wire harness in which an insulation member can be fixed to various electric wires (bundle) regardless of a material of the covered part of the electric wire. <P>SOLUTION: The wire harness 1 includes the electric wire bundle 2 and the insulation member 3. The electric wire bundle 2 is composed of the plurality of electric wires 4 in which core wires 41 exposed at one end 4a are joined with each other. The insulation member 3 is mounted on an assembled part 43 that is the core wire 41 joined by the electric wire bundle 2. The insulation member 3 includes a cylindrical body 31, an occluded part 32, and a coupling part 33. As for the occluded part 32, the one end 34 of the body part 31 is completely occluded. As for the coupling part 33, inner faces of the other end 35 of the body part 31 are partly coupled, and a plurality of hole parts 36 are formed through which the other end 4b of the electric wires 4 is made to pass. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wire harness including an electric wire bundle composed of a plurality of electric wires joined to an exposed core wire, and an insulating member attached to the core wire joined to the electric wire bundle.

  Many electronic devices are mounted on automobiles, and electronic devices are connected to automobiles and other electronic devices via wire harnesses. The wire harness includes an electric wire bundle made up of a plurality of electric wires. The electric wire includes a core wire made of a conductive material and a covering portion made of an insulating material that covers the core wire.

  A connector having a terminal fitting and a connector housing for accommodating the terminal fitting is attached to the ends of these electric wires. Further, for example, the electric wires may be electrically connected by exposing the core wires at one end of the electric wires and joining the core wires by ultrasonic welding or resistance welding. A cap-shaped insulating member made of an insulating material is attached to insulate a joining portion (hereinafter referred to as a joining portion) of core wires formed at the end of such a wire bundle (see, for example, Patent Documents 1 to 4). ).

  In Patent Documents 1 and 2, after the end of the wire bundle is immersed in an adhesive and the adhesive is infiltrated between the wires, the end of the wire bundle, that is, the joint portion is passed through the insulating member. And the insulation member is attached to the wire bundle by welding with the outer surface of the coating | coated part of an electric wire, and the inner surface of an insulation member by heating with an ultrasonic wave etc.

  In Patent Document 3, after the end of the wire bundle, that is, the joint portion is passed through the insulating member, the insulating member is filled with a waterproofing agent. And the insulation member is attached to the wire bundle by welding with the outer surface of the coating | coated part of an electric wire, and the inner surface of an insulation member by heating with an ultrasonic wave etc.

In Patent Document 4, after the end of the wire bundle is immersed in an adhesive and the adhesive is infiltrated between the wires, the end of the wire bundle, that is, the joint portion is passed through the insulating member. And the insulating member is attached to the electric wire bundle by winding an adhesive tape over the outer surface of the coating | coated part of an electric wire, and the outer surface of an insulating member.
Japanese Patent Laid-Open No. 11-87007 JP-A-11-233175 Japanese Patent Laid-Open No. 7-99080 JP 11-55820 A

  In Patent Documents 1 to 3 described above, the wire covering portion and the insulating member are welded. However, there are many types of materials for the covering portion of the electric wire, and it is difficult to firmly weld one type of insulating member and all types of electric wires. There is a problem that a plurality of types of insulating members are required to deal with electric wires.

  For example, in Patent Document 2, a hot melt layer made of a polyamide-based resin is formed on the inner surface of an insulating member, and the hot melt layer and the covering portion of the electric wire are welded, so that the covering portion is made of a polyvinyl chloride resin. In some cases, high adhesion is obtained. However, in recent years, in consideration of environmental problems, an electric wire in which the covering portion is made of a halogen-free resin such as a polypropylene resin has been frequently used. And in the case of the electric wire which a coating part consists of such a polypropylene-type resin, sufficient adhesiveness with the hot-melt layer which consists of a polyamide-type resin mentioned above was not able to be obtained.

  Moreover, in patent document 4, the coating | coated part and insulating member of the electric wire were wound and fixed with the adhesive tape. However, as mentioned above, there are many types of materials for the covering portion of the electric wire, and it is difficult to firmly fix the insulating member and all types of electric wires with a single type of adhesive tape. The versatility of insulating members and adhesive tapes is low, and there is a problem that a plurality of types of insulating members and adhesive tapes are required to cope with many types of electric wires.

  The present invention aims to solve such problems. That is, an object of the present invention is to provide a wire harness that can reliably attach an insulating member to various electric wires (bundles) without depending on the material of the covering portion of the electric wires.

  In order to solve the above problems and achieve the object, the invention described in claim 1 is a wire bundle composed of a plurality of electric wires in which core wires exposed at one end are joined to each other, and the wire bundle is joined. In a wire harness comprising an insulating member attached to a core wire, the cylindrical main body portion that positions the bonded core wire inside the insulating member, and a blocking portion that completely closes one end portion of the main body portion A wire harness comprising: a connecting portion that partially connects inner surfaces of the other end portions of the main body portion to form a plurality of holes through which the other end portion of the electric wire passes.

  The invention described in claim 2 includes an electric wire bundle composed of a plurality of electric wires in which core wires exposed at a central portion are joined to each other, and an insulating member attached to the core wire to which the electric wire bundle is joined. In the wire harness, the insulating member includes a cylindrical main body portion that positions the joined core wires on the inside, and a hole portion through which one end portion of the electric wire is passed by partially connecting inner surfaces of the one end portions of the main body portion. A wire having a plurality of holes and a plurality of hole portions through which the inner surfaces of the other end portions of the main body portion are partially connected to pass the other end portion of the electric wire. It is a harness.

  The invention described in claim 3 is the wire harness according to claim 1 or 2, wherein the connecting portion is formed by ultrasonic welding.

  According to a fourth aspect of the present invention, in the wire harness according to the first aspect, the closing portion is formed by ultrasonically welding inner surfaces of one end portions of the main body portion. It is a harness.

  According to the invention described in claim 1, since the insulating member includes a closing portion that closes one end portion of the main body portion, and a connecting portion that partially connects the inner surfaces of the other end portions of the main body portion. By connecting (welding, bonding, etc.) the same material on the insulating member side, the insulating member can be attached to the wire bundle, and the insulating member and the covering portion of the electric wire can be welded or an adhesive tape can be attached to the insulating member and the electric wire. There is no need to wrap. Therefore, an insulating member can be reliably attached to various electric wires (bundles) without depending on the material of the covering portion of the electric wires.

  According to the invention described in claim 2, since the insulating member includes a pair of connecting portions in which the inner surfaces of the one end portions of the cylindrical main body portion and the inner surfaces of the other end portions are partially connected to each other. By connecting (welding, bonding, etc.) the same material to each other on the insulating member side, the insulating member can be attached to the wire bundle, and the insulating member and the covering portion of the electric wire can be welded, or the insulating member and the electric wire can be adhesive tape. There is no need to wrap around. Therefore, an insulating member can be reliably attached to various electric wires (bundles) without depending on the material of the covering portion of the electric wires.

  According to the third aspect of the present invention, since the connecting portion is formed by ultrasonic welding, the connecting portion can be easily and reliably formed, and the cost can be suppressed because no consumable material such as an adhesive is required. .

  According to the invention described in claim 4, since the closing portion is formed by connecting the inner surfaces of the one end portions of the main body portion, the insulating member may be formed into a simple cylindrical shape. Cost can be reduced. Further, since the closed portion is formed by ultrasonic welding, the closed portion can be formed easily and reliably, and consumables such as an adhesive are not required, and the cost can be suppressed.

  Hereinafter, the wire harness 1 concerning the 1st Embodiment of this invention is demonstrated with reference to FIG. 1 thru | or FIG. The wire harness 1 according to the first embodiment of the present invention is routed to, for example, an automobile as a moving body. As shown in FIG. 1, the wire harness 1 includes a wire bundle 2 and an insulating member 3 attached to the wire bundle 2.

  The electric wire bundle 2 includes a plurality of electric wires 4. As shown in FIG. 1, the electric wire 4 includes a core wire 41 made of a conductive material and a covering portion 42 made of an insulating material. The core wire 41 is formed by twisting a plurality of strands 41a. The strand 41a is made of a conductive material. A core wire 41 is exposed at one end 4 a of the electric wire 4. In the illustrated example, the number of the electric wires 4 is two, but the number of the electric wires 4 may be three or more. Moreover, the core wire 41 may be comprised from the one strand 41a.

  The covering portion 42 is made of, for example, a resin material such as a polyvinyl chloride resin or a halogen-free resin such as a polypropylene resin. The covering portion 42 covers the core wire 41. And the electric wire bundle 2 may be comprised from the some electric wire 4 provided with the coating | coated part 42 which consists of the same resin material, and the some electric wire 4 provided with the coating | coated part 42 which consists of a different resin material is mixed. May be.

  In the wire bundle 2 described above, the core wires 41 exposed from the one end portions 4a of the plurality of wires 4 are joined to each other. The joint portion between the core wires 41 and the joint portion 43 are referred to. The joint portion 43 is formed by ultrasonic welding or resistance welding between the exposed core wires 41. The joint portion 43 electrically connects the core wires 41 to each other and electrically connects the electric wires 4 to each other.

  The insulating member 3 is made of a synthetic resin capable of ultrasonic welding such as a thermoplastic resin. As shown in FIG. 3, the insulating member 3 is attached to the joint 43 of the wire bundle 2. The insulating member 3 includes a main body portion 31, a closing portion 32, and a connecting portion 33. The main body 31 is formed in a cylindrical shape. The inner diameter of the main body 31 is larger than the outer diameter of the wire bundle 2. The main body 31 positions the joint 43 on the inside.

  The closing part 32 is provided over one end part 34 near the one end part (tip part) 4 a of the electric wire 4 of the main body part 31 and the entire width direction (left and right direction in FIG. 3) of the main body part 31. The closing portion 32 connects the upper inner surface 34a in FIG. 5 at one end 34 of the main body portion 31 to the lower inner surface 34b opposite to the inner surface 34a (in FIG. 34a and 34b are indicated by alternate long and short dash lines). The closing part 32 completely closes the one end part 34 of the main body part 31.

  The blocking portion 32 described above is formed by ultrasonically welding the above-described inner surfaces 34a and 34b of the main body portion 31 with an ultrasonic welding machine. The closing portion 32 is formed after the joint portion 43 is passed through the main body portion 31. The closing portion 32 may be formed in advance before the joint portion 43 is passed through the main body portion 31.

  As shown in FIG. 3, the connecting portion 33 is provided at the other end portion 35 near the other end portion (base end portion) 4 b of the electric wire 4 of the main body portion 31 and at the center in the width direction of the main body portion 31. The connecting portion 33 connects a small circular inner surface 35a of the upper inner surface in FIG. 4 at the other end 35 of the main body 31 and a small circular inner surface 35b opposite to the inner surface 35a. (In FIG. 4, these inner surfaces 35a and 35b are indicated by alternate long and short dash lines for the sake of convenience). In this way, the connecting portion 33 partially connects the inner surfaces of the other end portion 35 of the main body portion 31 by connecting the inner surfaces 35a and 35b.

  The connecting portion 33 described above is formed by ultrasonically welding the above-described inner surfaces 35a and 35b of the main body portion 31 with an ultrasonic welding machine. The connecting portion 33 is formed after the joint portion 43 is passed through the main body portion 31. A hole 36 is formed by the connecting portion 33.

  As shown in FIGS. 3 and 4, the hole 36 is formed inside the main body 31 on the other end 35 side. Two holes 36 are formed side by side along the width direction of the main body 31. The hole 36 has an elliptical cross-sectional shape in the illustrated example. The inner diameter of the hole 36 is larger than the outer diameter of the electric wire 4. The other end 4b of the electric wire 4 is passed through the two holes 36, respectively.

  An ultrasonic welder having a known structure can be used. The ultrasonic welding machine includes a transmitter that amplifies an electric signal, a vibrator that ultrasonically vibrates by the electric signal from the transmitter, and a horn that is connected to the vibrator and transmits the ultrasonic vibration of the vibrator to the object to be welded. 5 and contact / separation means for contacting / separating the vibrator and the horn 5 with the object to be welded.

  The horn 5 includes a first horn 51 (FIG. 5) and a second horn 52 (FIG. 4). The first horn 51 is formed in a flat plate shape. The first horn 51 is provided so that it can be pressed against the one end 34 of the main body 31 of the insulating member 3. The first horn 51 forms the closing part 32. The second horn 52 is formed in a long cylindrical shape. The second horn 52 is provided so as to be pressed against the other end 35 of the main body 31 of the insulating member 3 and the center in the width direction. The second horn 52 forms the connecting portion 33.

  In the ultrasonic welding machine described above, the first and second horns 51 and 52 that are ultrasonically vibrated are brought close to the insulating member 3 on the receiving jig 53 by the contacting / separating means, and the one end 34 and the other of the main body 31 are respectively connected. Press against the end 35. Then, the inner surfaces 34a, 34b of the main body 31 are brought into contact with each other by the first horn 51, the ultrasonic vibration of the horn 51 is transmitted to the contacted inner surfaces 34a, 34b, and heated by frictional heat. The closed portion 32 is formed by welding. Further, the inner surfaces 35a and 35b of the main body 31 are brought into contact with each other by the second horn 52, the ultrasonic vibration of the horn 52 is transmitted to the contacted inner surfaces 35a and 35b, and heated by frictional heat. The connecting portion 33 is formed by welding.

  When attaching the insulating member 3 having the above-described configuration to the wire bundle 2, first, the other end 4b side of the wire 4 of the wire bundle 2 in which the joint portion 43 is formed as shown in FIG. 1 is divided into two bundles. For example, the wire bundle 2 is held in a Y shape by a jig (not shown). Then, the joining part 43 and the other end part 35 of the main body part 31 of the insulating member 3 are made to face each other, and the joining part 43 and the insulating member 3 are arranged along the arrow A direction from the other end part 35 side of the main body part 31. And bring them closer together. Then, as shown in FIG. 2, the joint portion 43 is positioned in the main body portion 31.

  Then, the first horn 51 of the ultrasonic welding machine described above is pressed against the one end 34 of the main body 31 on the receiving jig 53 to weld the inner surfaces 34a and 34b of the main body 31 to the closed portion 32. Formed and closes one end 34 of the main body 31.

  Further, the second horn 52 is pressed against the other end 35 of the main body 31 to weld the inner surfaces 35 a and 35 b of the main body 31 to form the connecting portion 33, thereby forming the two holes 36. At this time, by forming the connecting portion 33 between the two bundles of the electric wires 4, the electric wires 4 are respectively passed through the two holes 36. Thus, the insulating member 3 is attached to the wire bundle 2 as shown in FIG.

  Thus, when the insulating member 3 is attached to the wire bundle 2, even if the wire bundle 2 is pulled in the direction of arrow A1 (FIG. 3) (even if the insulating member 3 is pulled in the direction of arrow A2 (FIG. 3)), the connecting portion The joining portion 43 is not caught by 33 and the insulating member 3 is not detached from the wire bundle 2. Further, even if the wire bundle 2 is pushed in the direction of the arrow A2 (even if the insulating member 3 is pushed in the direction of the arrow A1), the joint portion 43 is pressed against the closing portion 32 and the wire bundle 2 penetrates out of the insulating member 3. There is no. If the insulating member 3 and the wire bundle 2 are moved away from each other, the joining portion 43 is not caught by the connecting portion 33 and the insulating member 3 is not detached from the wire bundle 2. As described above, the insulating member 3 is securely attached to the joint portion 43, and the joint portion 43 is reliably insulated by the insulating member 3.

  According to this embodiment, the insulating member 3 includes the closing portion 32 that closes the one end portion 34 of the main body portion 31, and the connecting portion 33 that connects the inner surfaces 35 a and 35 b of the other end portion 35 of the main body portion 31. Therefore, the insulating member 3 can be attached to the wire bundle 2 by welding and connecting the same materials on the insulating member 3 side, and the insulating member 3 and the covering portion 42 of the electric wire 4 can be welded or the insulating member 3 There is no need to wrap an adhesive tape around the wire 4 and the electric wire 4. Therefore, the insulating member 3 can be reliably attached to the various electric wires 4 (the electric wire bundle 2) without depending on the material of the covering portion 42 of the electric wires 4.

  Since the connecting portion 33 is formed by ultrasonic welding, the connecting portion 33 can be formed easily and reliably, and a consumable material such as an adhesive is not required, so that the cost can be reduced.

  Since the blocking portion 32 is formed by connecting the inner surfaces 34a, 34b of the one end portion 34 of the main body portion 31, the insulating member 3 may be formed into a simple cylindrical shape, and the cost at the time of forming the insulating member 3 is suppressed. Can do. In addition, since the closed portion 32 is formed by ultrasonic welding, the closed portion 32 can be formed easily and reliably, and consumables such as an adhesive are not required, and the cost can be suppressed.

  In the present embodiment, one connecting portion 33 is provided. However, in the present invention, a plurality of connecting portions 33 may be provided. For example, two connecting portions 33 may be provided at the other end portion 35 of the main body 31 along the width direction of the main body 31. In this case, three hole portions 36 through which the electric wires 4 are passed are formed. Moreover, in this embodiment, although the shape of the inner surfaces 35a and 35b of the main-body part 31 which the connection part 33 connects was made into the small circle shape, a rectangular shape etc. may be sufficient. That is, if the connecting portion 33 forms a plurality of hole portions 36, the number of connecting portions 33 and the shapes of the inner surfaces 35a and 35b are not limited at all.

  Moreover, in this embodiment, the obstruction | occlusion part 32 and the connection part 33 were formed by ultrasonic welding. However, in the present invention, for example, the closing portion 32 and the connecting portion 33 may be formed by bonding with an adhesive or the like. In this case, the inner surfaces 34a and 34b and the inner surfaces 35a and 35b of the main body 31 made of the same material may be bonded to each other, so that they can be securely attached to various electric wires 4. Further, the closing portion 32 and the connecting portion 33 may be formed by heat welding by heat from a heat source, laser welding by laser light, or the like. That is, any method may be used as long as the closing portion 32 and the connecting portion 33 can be formed.

  Moreover, in this embodiment, the insulating member 3 was formed in the cylinder shape. However, in the present invention, the insulating member 3 may be formed in a cap shape. That is, the insulating member 3 may be formed by injection molding or the like as a shape (cap shape) in which the closing portion 32 is formed in advance.

  Next, a wire harness 1A according to a second embodiment of the present invention will be described with reference to FIG. Note that the same components as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  A wire harness 1A according to the second embodiment of the present invention includes a wire bundle 2A and an insulating member 3A. The electric wire bundle 2A is composed of a plurality of electric wires 4 in which the core wires 41 exposed at the central portion 4c are joined. That is, the joint portion 43 </ b> A is provided in the central portion 4 c of the plurality of electric wires 4.

  The insulating member 3A is attached to the joint 43A to insulate the joint 43A. The insulating member 3 includes a main body portion 31 and a pair of connecting portions 33 and 33A. Since one of the pair of connecting portions 33 and 33A is provided at the same position as the connecting portion 33 of the first embodiment and has the same structure, detailed description thereof is omitted.

  The other connecting portion 33A (hereinafter simply referred to as connecting portion 33A) differs from one connecting portion 33 only in the position where it is formed. The connecting portion 33 </ b> A is provided at one end portion 34 of the main body portion 31 and at the center in the width direction of the main body portion 31.

  The connecting portion 33 </ b> A described above partially connects the inner surfaces of the one end portion 34 of the main body portion 31. The connecting portion 33A is formed by ultrasonic welding using an ultrasonic welding machine. The connecting portion 33 </ b> A is formed after the joint portion 43 </ b> A is passed through the main body portion 31. A hole 36A is formed by the connecting portion 33A.

  The hole portion 36 </ b> A is provided inside the main body portion 31 on the one end portion 34 side. Two hole portions 36 </ b> A are formed side by side along the width direction of the main body portion 31. The hole 36A has an elliptical cross-sectional shape. The inner diameter of the hole 36 </ b> A is larger than the outer diameter of the electric wire 4. The one end portion 4a of the electric wire 4 is passed through each of the two hole portions 36A.

  When attaching the insulating member 3A having the configuration described above to the wire bundle 2A, first, the wire bundle 2A is passed through the main body portion 31 of the insulating member 3A, and the joint portion 43A formed in the central portion 4c of the electric wire 4 is used as the main body portion. Position within 31. Then, the one end 4a side and the other end 4b side of the electric wire 4 of the electric wire bundle 2A are each divided into two bundles, and the electric wire bundle 2A is held in an X shape by a jig or the like (not shown), for example.

  Thereafter, similarly to the first embodiment, the connecting portions 33 and 33A are formed by an ultrasonic welding machine to form the two hole portions 36 and 36A. At this time, by forming the connecting portion 33A between the two bundles on the one end portion 4a side of the electric wire 4, the one end portion 4a of the electric wire 4 is passed through the two hole portions 36A. Further, by forming the connecting portion 33 between the two bundles on the other end portion 4 b side of the electric wire 4, the other end portion 4 b of the electric wire 4 is passed through the two hole portions 36, respectively. Thus, the insulating member 3A is attached to the wire bundle 2A.

  When the insulating member 3A is attached to the electric wire bundle 2A in this way, even if the electric wire bundle 2A is pulled in the direction of arrow B1 (FIG. 6) (even if the insulating member 3A is pulled in the direction of arrow B2 (FIG. 6)) 43A is not caught by the connection part 33, and the joining part 43A does not come out of the insulating member 3A. Further, even if the wire bundle 2A is pulled in the direction of the arrow B2 (even if the insulating member 3A is pulled in the direction of the arrow B1), the joining portion 43A is caught by the connecting portion 33A and the joining portion 43A comes out of the insulating member 3A. There is no. As described above, the insulating member 3A is securely attached to the joint 43A, and the joint 43A is reliably insulated by the insulating member 3A.

  According to the present embodiment, the insulating member 3 </ b> A includes the pair of connecting portions 33 and 33 </ b> A in which the inner surfaces of the one end 34 of the cylindrical main body 31 and the inner surfaces of the other end 35 are partially connected. Therefore, the insulating member 3A can be attached to the wire bundle 2A by welding and connecting the same materials on the insulating member 3A side, and the insulating member 3A and the covering portion 42 of the electric wire 4 can be welded or the insulating member 3A. There is no need to wrap an adhesive tape around the wire 4 and the electric wire 4. Therefore, the insulating member 3A can be reliably attached to the various electric wires 4 (the electric wire bundle 2A) without depending on the material of the covering portion 42 of the electric wires 4.

  Since the connecting portions 33 and 33A are formed by ultrasonic welding, the connecting portions 33 and 33A can be easily and reliably formed, and the cost can be suppressed because a consumable material such as an adhesive is not required.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

It is a top view which shows the wire harness concerning the 1st Embodiment of this invention. It is a top view which shows the state in the middle of the insulating member shown by FIG. 1 being attached to an electric wire bundle. It is a top view which shows the state by which the insulating member shown by FIG. 2 was attached to the wire bundle. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. It is sectional drawing along the VV line in FIG. It is a top view which shows the wire harness concerning the 2nd Embodiment of this invention.

Explanation of symbols

1, 1A Wire harness 2, 2A Wire bundle 3, 3A Insulating member 4 Wire 4a One end (wire)
4b The other end (electric wire)
4c Center (electric wire)
31 Main body part 32 Closure part 33, 33A Connecting part 34 One end part (main body part)
35 Other end (main part)
36, 36A hole 41 core wire

Claims (4)

In a wire harness comprising: an electric wire bundle composed of a plurality of electric wires joined to each other exposed at one end, and an insulating member attached to the core wire joined to the electric wire bundle,
The insulating member is
A cylindrical main body for positioning the joined core wires inside;
A closing part for completely closing one end of the main body part;
A wire harness comprising: a connecting portion that partially connects inner surfaces of the other end portions of the main body portion to form a plurality of holes through which the other end portion of the electric wire passes. In a wire harness comprising an electric wire bundle composed of a plurality of electric wires joined to each other and exposed to the central portion, and an insulating member attached to the core wire joined to the electric wire bundle,
The insulating member is
A cylindrical main body for positioning the joined core wires inside;
The inner surfaces of the one end portions of the main body portion are partially connected to form a plurality of holes through which the one end portion of the electric wire passes, and the inner surfaces of the other end portions of the main body portion are partially connected to each other. A wire harness comprising: a pair of connecting portions that form a plurality of hole portions through which end portions pass.   The wire harness according to claim 1 or 2, wherein the connecting portion is formed by ultrasonic welding.   The wire harness according to claim 1, wherein the blocking portion is formed by ultrasonic welding of inner surfaces of one end portions of the main body portion.

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