JP2013122854A - Wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the displacement and the removal of a water shutoff material, thereby ensuring stable water shutoff performance, with a simple structure at a water shutoff part in a wire harness where a gap between an insulation wire and a cover member covering a periphery of an end part of the insulation wire is closed by the water shutoff material.SOLUTION: In a wire harness 1, an insulation coating of an insulation wire 10 is a rubber coating 12. An annular member 30 is an annular hard member into which a core wire 11 of the insulation wire 10 penetrates and is inserted into an area between the core wire 11 and the rubber coating 12 at an end part of the insulation wire 10. A cover member 40 is an insulative hard member which covers a periphery of the end part of the insulation wire 10. An inner surface of the cover member 40 closely contacts with an annular projection part 121 which annularly protrudes, overlapping the annular member 30 in at least the rubber coating 12, over its entire periphery.

Description

  The present invention relates to a wire harness including an insulated wire and a metal terminal provided at an end thereof.

  In recent years, in wire harnesses mounted on automobiles, wire harnesses including insulated wires and metal terminals provided at the ends thereof are required to have higher waterproof performance. The wire harness having a waterproof function includes a water stop portion that prevents liquid from entering the metal terminal portion through the insulation coating at the insulation coating portion at the end of the insulated wire.

  The water-stop portion of the wire harness generally includes a cover member that is an insulating hard member that covers the periphery of the end portion of the insulated wire, and a water-stop material that closes a gap between the cover member and the insulated wire. A cover member is provided for the waterproofing of the edge part of an insulated wire, mechanical protection, and electrical insulation.

  As the water stop part of the wire harness, for example, a water stop part provided with a resin coating member formed by insert molding using an end of an electric wire with terminal as an insert part, and a cavity of a hard resin housing such as a connector. A water stop portion that closes the gap between the end portion of the inserted electric wire with terminal and the resin casing is conceivable. In the following description, the former is referred to as a resin-coated water stop and the latter as a cavity closed type water stop. The resin coating member and the resin casing are examples of the cover member.

  In the water-stop part of the resin-coated type, the resin-coated member is made of a hard synthetic resin material, and a protective area including the area from the insulating coating part at the end of the insulated wire to the connection part with the core wire in the metal terminal is inserted. It is a part formed so as to cover the protective region by insert molding as a part.

  Further, in the step of forming the resin-coated type water-stop part, before the resin-coated member is insert-molded, the water-stop material is formed on the entire surface of the insulating cover at the end of the insulated wire. The This water blocking material closes the gap between the insulating coating and the resin coating member.

  In a wire harness provided with a resin-coated water stop, the thermal expansion coefficient of the insulating coating and the thermal expansion coefficient of the resin-coated member are different. Therefore, the waterstop material needs to have elasticity that can cope with the difference in thermal expansion between the insulating coating and the resin coating member. Furthermore, the water stop material needs to be fixed at a predetermined position in the insulating coating so as not to be displaced due to the pressure of the resin at the time of insert molding of the resin coating member.

  For example, in the wire harness shown in Patent Document 1, the resin-coated member is formed by insert molding using an insulated wire wound with an adhesive tape (seal member) having elasticity as an insert portion. The adhesive tape shown in Patent Document 1 is made of silicone rubber or butyl rubber, and functions as a water stop material that prevents water from entering from the gap between the insulating coating and the resin coating member.

  On the other hand, the cavity blocking type water stop has a hard resin housing such as a connector, and a cylindrical rubber plug that plugs the gap between the connector and the end of the terminal-attached electric wire inserted into the cavity of the resin housing. Prepare. The cylindrical rubber stopper is pushed into the cavity of the resin casing in a state in which the insulating coating portion at the end portion of the terminal-attached electric wire passes through the hollow portion. Thereby, the rubber plug functions as a water blocking material that closes the gap between the insulating coating portion of the insulated wire and the inner surface of the cavity portion of the resin casing.

JP 2006-123458 A

  However, when the adhesive tape is employed as a water-stopping material between the insulating coating and the resin-coated member in the resin-coated water-stop portion, the following disadvantages occur.

  That is, since the adhesive tape is thin, it is difficult to exhibit sufficient expansion / contraction performance corresponding to the difference in thermal expansion between the insulating coating and the resin coating member. In addition, in order to secure a sufficient thickness as a water-stopping material, wrapping the adhesive tape multiple times varies the water-stop performance because the winding state of the adhesive tape varies depending on the skill of the operator who winds the tape. Inconvenience that it is easy.

  Further, when an adhesive tape having a large thickness, such as an adhesive tape made of butyl rubber, is employed, a gap is likely to be formed at a portion where the adhesive tape overlaps due to a large step formed by the end of the adhesive tape. Such a gap causes deterioration of the water stop performance. Furthermore, since the adhesive tape of butyl rubber is not sufficiently heat resistant, it is not suitable for a wire harness laid in a high temperature place.

  On the other hand, when a rubber-made cylindrical member having a large thickness is employed as the water-stopping material, the cylindrical member is likely to be displaced due to the pressure of the resin during the insert molding of the resin-coated member. The misalignment of the water stop material causes deterioration and variation in the water stop performance.

  In addition, when a cylindrical rubber stopper is adopted as a water-stopping material in the cavity-stopping type water-stopping part, the rubber plug may come out of the cavity of the nectar due to the force applied to the electric wire, and the water-stopping function may be lost. . Therefore, it is necessary to provide the connector with a retaining mechanism that prevents the rubber stopper from coming off from the cavity of the connector. Providing such a retaining mechanism is not preferable because it complicates and enlarges the insulating housing (cover member).

  The present invention prevents the water stop material from being displaced and detached by a simple structure in the water stop portion where the gap between the insulated wire and the cover member covering the periphery of the end portion of the wire harness is closed with the water stop material. The purpose is to secure stable water stopping performance.

The wire harness which concerns on 1st invention is equipped with each component shown below.
(1) The first component is an insulated wire having a conductive core wire and a rubber coating that is a rubber insulating coating covering the periphery of the core wire.
(2) A 2nd component is a metal terminal electrically connected with the said core wire in the edge part of the said insulated wire.
(3) The third component is an annular hard member through which the core wire of the insulated wire passes, and is an annular member inserted between the core wire and the rubber coating at the end of the insulated wire. .
(4) The fourth component is an insulative hard member that covers the periphery of the end of the insulated wire, and the inner side surface of the portion that at least overlaps with the annular member in the rubber coating and is raised in an annular shape The cover member is in close contact over the entire circumference.

  The wire harness according to the second invention is an aspect of the wire harness according to the first invention. The wire harness which concerns on 2nd invention WHEREIN: The outer peripheral surface on the opposite side with respect to the terminal side of the said core wire in the said annular member which the said core wire of the said insulated wire penetrated is a taper taper surface.

  Moreover, the wire harness which concerns on 3rd invention is one aspect | mode of the wire harness which concerns on 1st invention or 2nd invention. In the wire harness according to the third aspect of the present invention, a top surface that is parallel to the axial direction of the annular member and forms the maximum contour of the annular member is formed on the outer peripheral surface of the annular member.

  Moreover, the wire harness which concerns on 4th invention is one aspect | mode of the wire harness which concerns on either of 1st invention from 3rd invention. The wire harness which concerns on 4th invention WHEREIN: The some annular convex surface which forms the ridgeline over each perimeter is formed in the outer peripheral surface of the said annular member at intervals in the axial center direction of the said annular member.

  In the wire harness according to the first aspect of the present invention, the portion of the insulated wire covered with the annular member in the rubber sheath that protrudes in an annular shape functions as a water stop material that closes the gap between the insulated wire and the cover member that covers the periphery of the end portion. . Since the rubber coating is an elastic body, it is elastically deformed according to the expansion and contraction of the cover member due to the temperature change, and maintains high water stopping performance.

  Moreover, the annular member is inserted inside the rubber coating in the insulated wire. Therefore, when the cover member is formed by insert molding, the annular member is unlikely to be displaced due to the pressure of the resin during insert molding. Further, when the cover member is an insulating housing having a cavity, the annular member does not come off the cavity like a rubber plug. Therefore, the cover member does not need to be provided with a special mechanism that increases complexity and size, unlike a rubber stopper retaining mechanism.

  As described above, according to the first invention, in the water stop portion where the gap between the insulated wire and the cover member covering the periphery of the end portion is closed by the water stop material (the annular bulge portion in the rubber coating). With a simple structure, it is possible to prevent the displacement and detachment of the water-stopping material and to ensure stable water-stopping performance.

  Further, in the wire harness according to the second invention, the tapered surface on the outer peripheral surface of the annular member reduces the frictional resistance between the annular member and the rubber coating when the annular member is inserted inside the rubber coating of the insulated wire. To play a role. Therefore, according to the second invention, it becomes possible to easily insert the annular member inside the rubber coating in the insulated wire.

  In the wire harness according to the third aspect of the invention, the rubber sheath of the insulated wire is formed on the top surface of the raised portion that is raised according to the shape of the top surface of the annular member, with respect to the inner surface of the cover member rather than other portions. Close at higher pressure. Moreover, if the top surface of the annular member is a surface parallel to the axial direction of the annular member, the portion of the rubber coating that is in close contact with the inner surface of the cover member at the highest pressure, that is, the ridge of the rubber coating. The top surface can be made an area necessary and sufficient for water stoppage. Therefore, according to the 3rd invention, the water stop performance of a water stop part can be improved.

  Further, in the wire harness according to the fourth aspect of the invention, the outer peripheral surface of the annular member has a plurality of annular convex surfaces, so that the rubber-covered raised portion that is in close contact with the inner surface of the cover member with the highest pressure is insulated. A plurality of wires are formed side by side in the longitudinal direction of the electric wire. Thereby, the water stop performance increases more.

It is the top view and side view of the wire harness 1 which concern on 1st Embodiment of this invention. 3 is a cross-sectional view of a cover member portion of the wire harness 1. FIG. It is the top view of the annular member with which the wire harness 1 is provided, a front view, and a side view. FIG. 3 is a schematic diagram showing a procedure for manufacturing the wire harness 1. It is the top view, side view, and back view of wire harness 1A which concern on 2nd Embodiment of this invention. It is sectional drawing of the part of the cover member in 1A of wire harnesses. It is a top view, a front view, and a side view of an annular member according to an application example applicable to the wire harness 1, 1A.

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

<First Embodiment>
First, the configuration of the wire harness 1 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 3. As shown in FIG. 1, the wire harness 1 includes an insulated wire 10, a metal terminal 20, an annular member 30, and a cover member 40.

  2 is a cross-sectional view of a portion of the cover member 40 in the wire harness 1, and more specifically, a cross-sectional view of the wire harness 1 on the DD plane shown in FIG. 3A is a plan view of the annular member 30, FIG. 3B is a front view of the annular member 30, and FIG. 3C is a side view of the annular member 30.

<Insulated wire>
The insulated wire 10 includes a conductive core wire 11 and a rubber coating 12 that is a rubber insulating coating covering the periphery of the core wire 11. In the insulated wire 10, the end portion of the core wire 11 is formed to extend from the end portion of the rubber coating 12.

  The core wire 11 is made of a metal material such as copper, a copper alloy, or an aluminum alloy, for example. The core wire 11 may be a stranded wire having a structure in which a plurality of strands are twisted together, or may be a single wire.

  On the other hand, the rubber coating 12 is a member made of, for example, rubber or an elastomer (elastic polymer) that is a rubber-based material. That is, the rubber coating 12 is a coating made of a material having electrical insulation and elasticity. The elastomer includes vulcanized rubbers such as natural rubber and synthetic rubber, and thermosetting resin-based elastomers such as urethane rubber, silicone rubber and fluorine rubber.

<Metal terminal>
The metal terminal 20 is a terminal electrically connected to the core wire 11 at the end of the insulated wire 10. The metal terminal 20 is a metal fitting made of a metal material such as copper or a copper alloy. The metal terminal 20 is a part connected to a connection partner such as a bus bar, a terminal part of an electrical equipment, or a terminal of another wire harness. In the example shown in FIG. 1, the metal terminal 20 is a flat terminal having a through hole through which a screw is passed. However, it is also conceivable that the metal terminal 20 has other shapes such as a plate shape or a rod shape without a through hole.

  For example, the metal terminal 20 is fixed to the core wire 11 at the end of the insulated wire 10 by ultrasonic welding or the like. Alternatively, when the metal terminal 20 is a crimp terminal in which a caulking portion that is crimped to at least the core wire 11 of the insulated wire 10 is formed, the metal terminal 20 is crimped and fixed to the end portion of the insulated wire 10.

<Annular member>
The annular member 30 is an annular hard member through which the core wire 11 of the insulated wire 10 passes. The annular member 30 is inserted between the core wire 11 and the rubber coating 12 at the end of the insulated wire 10 with the core wire 11 penetrating through the hollow portion 31. The inner edge of the annular member 30 is formed in a shape along the outer peripheral surface of the core wire 11 so that no gap is generated between the annular member 30 and the core wire 11 as much as possible.

  In the example shown in each figure, the shape of the cross section of the core wire 11 is substantially circular, and the shape of the inner edge of the annular member 30 is circular. Therefore, the inner surface of the annular member 30 is a circumferential surface. However, when the shape of the cross section of the core wire 11 is a flat shape, the shape of the inner edge of the annular member 30 is formed in a flat shape along the outer peripheral surface of the core wire 11.

  Further, the annular member 30 is formed with a uniform thickness at least in the circumferential direction thereof, and forms a rotating body. The annular member 30 in the present embodiment is formed with a uniform thickness in the circumferential direction, and is formed with a non-uniform thickness in the axial direction.

  For example, the annular member 30 may be a metal member or a synthetic resin member. When the annular member 30 is a metal member, the metal may be, for example, copper or a copper alloy containing copper as a main component, aluminum, an aluminum alloy containing aluminum as a main component, or stainless steel. When the annular member 30 is a synthetic resin member, the synthetic resin may be a synthetic resin such as polyamide (PA), polypropylene (PP), ABS resin, or aromatic nylon.

  As shown in FIGS. 2 and 3, the outer peripheral surface 32 on the first side in the axial direction of the annular member 30 is a tapered taper surface. On the other hand, the end surface 34 on the second side in the axial direction of the annular member 30 is formed so as to be substantially orthogonal to the axial direction of the annular member 30. The axial direction of the annular member 30 means a direction along the center line R of the hollow portion 31 of the cylindrical annular member 30.

  As shown in FIG. 2, the outer peripheral surface 32 on the first side forming a tapered surface in the annular member 30 is relative to the end side of the core wire 11 in the annular member 30 in a state where the core wire 11 of the insulated wire 10 penetrates. It is an outer peripheral surface on the opposite side. In other words, the outer peripheral surface 32 on the first side is a surface facing the leading side when the annular member 30 is inserted inside the rubber coating 12 in the insulated wire 10.

  As shown in FIGS. 2 and 3, a top surface 33 that is parallel to the axial direction of the annular member 30 and forms the maximum contour of the annular member 30 is formed on the outer peripheral surface of the annular member 30. Has been.

  In the example shown in each figure, since the inner surface of the annular member 30 is a circumferential surface, the top surface 33 of the annular member 30 is a circumferential surface coaxial with the inner surface. However, when the shape of the cross section of the core wire 11 is a flat shape, the shape of the top surface 33 of the annular member 30 is a flat shape having a certain thickness between the inner surface along the outer peripheral surface of the core wire 11. Formed with.

  In a state in which the annular member 30 is inserted inside the rubber coating 12 in the insulated wire 10, the portion of the rubber coating 12 that overlaps the annular member 30 is expanded by the annular member 30 and protrudes in an annular shape. In the following description, this raised portion is referred to as an annular raised portion 121. The annular raised portion 121 is a portion that is raised in an annular shape overlapping the annular member 30 in the rubber coating 12.

  As shown in FIG. 2, the rubber sheath 12 of the insulated wire 10 is raised according to the shape of the annular member 30, and the annular raised portion 12 forms an outer peripheral surface having a shape substantially similar to the outer peripheral surface of the annular member 3. Yes. Therefore, a top surface 1211 that is parallel to the axial direction of the insulated wire 10 and forms the maximum contour of the rubber coating 12 is formed on the outer peripheral surface of the annular ridge 12.

<Cover member>
The cover member 40 is an insulating hard member that covers the periphery of the end portion of the insulated wire 10. The inner surface of the cover member 40 is in close contact with the entire circumference of the end portion of the rubber coating 12. Further, the inner surface of the cover member 40 is in close contact with the annular bulging portion 121 of the rubber coating 12 over its entire circumference with a stronger pressure than the other portions. The cover member 40 is a member made of an insulating resin such as polyamide (PA), polypropylene (PP), ABS resin, or aromatic nylon.

  In the wire harness 1, the cover member 40 and the annular raised portion 121 of the rubber coating 12 constitute a water stop portion that prevents liquid such as rainwater from entering the portion of the metal terminal 20 through the insulating coating 12. Here, the annular raised portion 121 functions as a water blocking material that closes the gap between the cover member 40 and the insulated wire 10. The cover member 40 is an example of a resin-coated member formed by insert molding. That is, the water stop part of the wire harness 1 is a resin-coated water stop part.

<Method for Manufacturing Wire Harness 1>
Next, the outline of the manufacturing procedure of the wire harness 1 will be described with reference to FIG. FIG. 4 is a schematic diagram showing a procedure for manufacturing the wire harness 1.

  In the manufacturing process of the wire harness 1, an annular member mounting process is first performed. As shown in FIG. 4A, in the annular member mounting step, the end portion of the core wire 11 in the insulated wire 10 is passed through the hollow portion 31 of the annular member 30 and the core wire 11 and rubber at the end portion of the insulated wire 10 are inserted. In this step, the annular member 30 is inserted between the cover 12 and the cover 12.

  By performing the annular member mounting step, as shown in FIG. 4A, an annular raised portion 121 is formed at the end of the rubber coating 12 in the insulated wire 10. In addition, in Fig.4 (a), 30 A of annular members before the insulated wire 10 penetrates are drawn with the virtual line (two-dot chain line).

  A terminal connection process is performed after completion | finish of an annular member mounting process. As shown in FIG. 4B, the terminal connection step is a step of attaching the metal terminal 20 to the end portion of the insulated wire 10 by welding or caulking.

  By performing a terminal connection process, as shown in Drawing 4 (b), electric wire 9 with a terminal is obtained. In the terminal-attached electric wire 9, the core wire 11 and the metal terminal 20 in the insulated electric wire 10 in a state where the annular member 30 is mounted are integrally connected and electrically connected. In addition, in FIG.4 (b), the metal terminal 20 before connecting to the insulated wire 10 is drawn with the virtual line.

  Finally, as shown in FIG. 4C, an insert molding process is performed. The insert molding step is a step of molding the resin material 40P in a molten state into a cover member 40 having a shape covering the protection region of the wire harness 1 by insert molding using the protection region in the insulated wire 10 as an insert portion. The protection region is a region including at least a region from the portion where the annular ridge portion 121 in the insulated wire 10 is formed to the connection portion 21 with the core wire 11 in the metal terminal 20.

  In the insert molding process, first, the protection region of the wire harness 1 is arranged at a predetermined position inside the mold 52 for molding the cover member 40. Thereafter, the molten resin material 40 </ b> P is injected from the resin supply device 53 into the mold 52. Thereby, the cover member 40 of synthetic resin is shape | molded in the shape which covers the protection area | region of the wire harness 1. FIG.

  In addition, the figure of the metal mold | die 52 shown by FIG.4 (d) is sectional drawing of the metal mold | die 52. FIG.

  The portion of the rubber coating 12 in the protection region of the insulated wire 10 is elastically contracted by the pressure received from the molten resin material 40P during the insert molding. Therefore, the cover member 40 covering the protection region is in close contact with the end portion of the rubber coating 12 by the elastic force (restoring force) of the contracted rubber coating 12.

  In the present embodiment, the annular raised portion 121 of the insulated wire 10 receives a pressure greater than that of the other portion from the molten resin material 40P during the insert molding, and is elastically contracted to a greater extent than the other portion. Therefore, the cover member 40 covering the protection region is in close contact with the contracted annular ridge portion 121 of the rubber coating 12 with a stronger elastic force than other portions.

  In the wire harness 1, the cover member 40 and the annular raised portion 121 of the rubber coating 12 constitute a water stop portion that prevents liquid such as rainwater from entering the portion of the metal terminal 20 through the insulating coating 12. Here, the annular raised portion 121 functions as a water blocking material that closes the gap between the cover member 40 and the insulated wire 10. The cover member 40 is an example of a resin-coated member formed by insert molding. That is, the water stop part of the wire harness 1 is a resin-coated water stop part.

Second Embodiment
Next, a wire harness 1A according to a second embodiment of the present invention will be described with reference to FIGS. The wire harness 1 </ b> A differs from the wire harness 1 shown in FIGS. 1 to 4 in the structure of a cover member that covers the end of the insulated wire 10. That is, the wire harness 1A includes a cover member 30A having a structure different from that of the cover member 30 instead of the cover member 30.

  5 and 6, the same constituent elements as those shown in FIGS. 1 to 4 are denoted by the same reference numerals. Hereinafter, only different points of the wire harness 1A from the wire harness 1 will be described.

  5A, 5B, and 5C are a plan view, a side view, and a rear view of the wire harness 1A, respectively. FIG. 6 is a cross-sectional view of the cover member 40A portion in the wire harness 1A, and more specifically, a cross-sectional view of the wire harness 1A in the EE plane shown in FIG.

  As shown in FIGS. 5 and 6, the wire harness 1 </ b> A includes a plurality of electric wires 9 with terminals and a cover member 40 </ b> A that collectively covers the periphery of the rubber coating 12 portion at each end of the electric wires 9 with terminals. Is provided. The cover member 30 </ b> A is formed with a plurality of cavities 41 that are holes into which ends of the insulated wires 10 in the plurality of electric wires with terminals 9 are inserted.

  In the example shown in FIGS. 5 and 6, the metal terminal 20 is a crimp terminal in which a crimped portion to be crimped to the core wire 11 of the insulated wire 10 is formed, and the metal terminal 20 is an end portion of the insulated wire 10. It is fixed by crimping.

  The cover member 40 </ b> A is an insulating hard resin casing that covers the periphery of each end portion of the plurality of insulated wires 10. In the cover member 40A, the inner surface forming the wall of the cavity 41 is in intimate contact with the annular raised portion 121 of the rubber coating 12 over the entire circumference. The cover member 40A is a member made of an insulating resin such as polyamide (PA), polypropylene (PP), ABS resin, or aromatic nylon.

  The water stopping portion of the wire harness 1A is a cavity closing type water stopping portion that closes a gap between the end portion of the terminal-attached electric wire 9 inserted into the cavity 41 of the cover member 40A, which is a hard resin casing, and the cover member 40. is there.

  In the manufacturing process of the wire harness 1A, the end portion of the insulated wire 10 to which the annular member 30 is previously attached is inserted into the cavity 41 of the cover member 40A that has been previously formed. The annular raised portion 121 of the insulated wire 10 functions as a water stop material that closes the gap between the inner surface of the cover member 40 </ b> A facing the cavity 41 and the end portion of the insulated wire 10 inserted into the cavity 41. The cover member 40A is an example of an insulating housing such as a connector.

  When the annular member 30 is inserted into the cavity 41 of the cover member 40A, the outer peripheral surface of the annular member 30 is slightly thinner than the thickness of the uncompressed natural rubber coating 12 between the wall of the cavity 41 and the annular member 30. It is formed in such a size that a gap is generated.

  When the end portion of the insulated wire 10 is inserted into the cavity 41 of the cover member 40A, the annular raised portion 121 of the insulated wire 10 is pushed into the gap between the insulated wire 10 and the cover member 40A and elastically contracts. Therefore, the cover member 40 that covers the end portion of the insulated wire 10 is in close contact with the annular ridge portion 121 over the entire circumference by the elastic force (restoring force) of the contracted annular ridge portion 121. .

<Effect>
In the wire harnesses 1, 1 </ b> A, the annular raised portion 121 in the rubber coating 12 of the insulated wire 10 functions as a water stop material that closes the gap between the insulated wire 10 and the cover members 40, 40 </ b> A covering the periphery of the end portion. Since the rubber coating 12 is an elastic body, the rubber coating 12 is elastically deformed according to the expansion and contraction of the cover members 40 and 40A due to the temperature change, and maintains high water stopping performance.

  In the wire harness 1, the annular member 30 is inserted inside the rubber coating 12 in the insulated wire 10. Therefore, when the cover member 40 is formed by insert molding, the annular member 30 is unlikely to be displaced due to the pressure of the molten resin 40P.

  Furthermore, in the wire harness 1A, the annular member 30 does not come off from the cavity 41 of the cover member 40A like a rubber plug. Therefore, the cover member 40A does not need to be provided with a special mechanism that increases complexity and size, such as a rubber stopper retaining mechanism.

  As described above, if the wire harnesses 1 and 1A are employed, the gap between the insulated wire 9 and the cover members 40 and 40A covering the periphery of the end portion is surely secured by the annular ridge 121 of the rubber coating 12. It is blocked. As a result, with a simple structure, it is possible to prevent the positional deviation and detachment of the water-stopping material and ensure stable water-stopping performance.

  Further, in the wire harnesses 1, 1 </ b> A, the outer peripheral surface 32 (tapered taper surface) on the first side of the annular member 30 is an annular member when the annular member 30 is inserted inside the rubber coating 12 in the insulated wire 10. It plays the role which reduces the frictional resistance of 30 and the rubber coating 12. Therefore, if the wire harness 1, 1 </ b> A is employed, the annular member 30 can be easily inserted inside the rubber coating 12 in the insulated wire 10.

  Further, in the wire harness 1, 1 </ b> A, the rubber coating 12 of the insulated wire 10 is covered with the cover members 40, 40 </ b> A more than other portions on the top surface 1211 of the annular raised portion 121 that is raised according to the shape of the top surface 33 of the annular member 30. Close to the inner surface of the tube with higher pressure.

  Moreover, since the top surface 33 of the annular member 30 is a surface parallel to the axial direction of the annular member 30, the portion that is in close contact with the inner surface of the cover member 40, 40 </ b> A in the rubber coating 12 at the highest pressure, that is, The top surface 1211 of the annular ridge portion 121 can have an area necessary and sufficient for water stoppage. Therefore, if the wire harness 1 and 1A are employ | adopted, the water stop performance of a water stop part can be improved.

<Application example>
Next, an annular member 30A according to an application example applicable to the wire harnesses 1 and 1A will be described with reference to FIG. FIG. 7A, FIG. 7B, and FIG. 7C are a plan view, a front view, and a side view of the annular member 30A, respectively.

  As shown in FIG. 7, on the outer peripheral surface of the annular member 30A, the top surface 33, which is an annular convex surface that forms a ridge line extending over the entire circumference, is formed at intervals in the axial direction of the annular member 30A. Yes. That is, on the outer peripheral surface of the annular member 30 </ b> A, a concave surface 35 that forms a groove over the entire periphery is formed between the plurality of top surfaces 33.

  In the wire harnesses 1, 1 </ b> A, when the annular member 30 </ b> A is employed instead of the annular member 30, the rubber covering 12 of the insulated wire 10 is raised from the top surface of the annular raised portion 121 that is raised according to the shape of the top surface 33 of the annular member 30. A plurality of 121 are formed side by side in the longitudinal direction of the insulated wire 10. The top surface 121 of the annular ridge 121 and the inner surface of the cover members 40, 40A are in close contact with each other with higher pressure than the other parts. Thereby, the water stop performance increases more.

<Others>
In the embodiment shown above, the plurality of cavities 41 are formed in the cover member 40A, and the cover member 40A covers the ends of the plurality of insulated wires 10 at once. However, it is also conceivable that the cover member 40 </ b> A is a member that covers only the end portion of one insulated wire 10.

  Similarly, the cover member 40 formed by insert molding may be a member that collectively covers the ends of the plurality of insulated wires 10. In this case, the cover member 40 is formed by insert molding using the end portions of the plurality of insulated wires 10 as insert portions.

  Moreover, in the example shown by each figure, the three top surface 33 (convex surface) is formed in the outer peripheral surface of the cyclic | annular member 30. FIG. However, it is also conceivable that two top surfaces 33 or four or more top surfaces 33 are formed on the outer peripheral surface of the annular member 30. It is also conceivable that only one top surface 33 is formed on the outer peripheral surface of the annular member 30.

DESCRIPTION OF SYMBOLS 1,1A Wire harness 10 Insulated electric wire 11 Core wire 12 Rubber coating 20 Metal terminal 21 Connection part 30, 30A Annular member 31 The hollow part of an annular member 32 The outer peripheral surface (taper surface) of the 1st side of an annular member
33 The top surface of the annular member 34 The end surface on the second side of the annular member 35 The concave surface of the annular member 40 Cover member 40P Resin material 52, 54 Mold 53 Resin supply device 121 An annular raised portion of insulating coating

Claims (4)

An insulated wire having a conductive core wire and a rubber coating that is a rubber insulating coating covering the periphery of the core wire;
A metal terminal electrically connected to the core wire at an end of the insulated wire;
An annular hard member through which the core wire of the insulated wire passes, and an annular member inserted between the core wire and the rubber coating at the end of the insulated wire;
An insulating hard member that covers the periphery of the end of the insulated wire, and a cover member that is in close contact with the inner surface of the rubber sheath and a portion that protrudes in an annular shape overlapping the annular member in the rubber coating. A wire harness comprising:   2. The wire harness according to claim 1, wherein an outer peripheral surface of the annular member through which the core wire of the insulated wire passes is opposite to an end side of the core wire is a tapered surface.   3. The wire according to claim 1, wherein a top surface that is parallel to an axial direction of the annular member and forms a maximum contour of the annular member is formed on an outer peripheral surface of the annular member. Harness.   The annular member according to any one of claims 1 to 3, wherein a plurality of annular convex surfaces, each forming a ridge line extending over the entire circumference, are formed on the outer circumferential surface of the annular member at intervals in the axial direction of the annular member. Wire harness according to crab.

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