JP2010068613A - Wiring harness - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiring harness which can readily stop water and without fail, between wires. <P>SOLUTION: A wiring harness 1A includes a wire bundle 2, a positioning member 3A and a water stop portion 4. The wire bundle 2 consists of a plurality of wires 20. The positioning member 3A is fixed to the end of the wire bundle 2 and positions the plurality of wires 20 at the end of the wire bundle 2, in a state of being separated from each other. The water stop portion 4 is formed by filling the gap between the wires 20 at the end of the wire bundle 2 with a waterproof agent and stops water at the gap between the wires 20. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wire harness provided with an electric wire bundle composed of a plurality of electric wires.

  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.

  The wire harness described above is routed between the engine room and the vehicle compartment through, for example, a grommet attached to a hole in a vehicle body panel of an automobile. In such a case, liquids such as water in the engine room may enter the vehicle compartment through the wire harness. For this reason, the water bundle is formed by covering a portion of the wire bundle passed through the grommet with a water-stopping agent such as moisture-curing silicone RTV (for example, see Patent Document 1).

  Moreover, the wire harness mentioned above exposes the core wire of the edge part of several electric wires, for example, joins these core wires by ultrasonic welding, resistance welding, etc., forms a junction part, and connects these electric wires electrically is doing. In such a case, water or other liquid may directly adhere to the joint, or water or other liquid that has traveled along the outer peripheral surface of the wire bundle or inside the wire bundle (that is, the gap between the wires) may adhere to the joint. As a result, the joint may be corroded. For this reason, the edge part of an electric wire bundle is covered with water-stopping agents, such as hot-melt resin, and the water stop part is formed.

  However, since the water-stopping agent such as the moisture-curing type silicone RTV and the water-stopping agent such as hot melt resin have a high viscosity, it is difficult to reliably spread the gap between the electric wires. There is a problem that it is difficult to reliably stop the water.

In order to solve such a problem, for example, after forming the water stop layer by spreading the water stop agent between the wires by immersing the wire bundle in a room temperature curing type water stop agent tank such as cyanoacrylate, etc. The process which forms the water stop part mentioned above on the surface of this water stop layer is performed. Since a room temperature curing type water-stopping agent such as cyanoacrylate has a low viscosity, it can be reliably distributed between the electric wires, and water can be reliably stopped between the electric wires by forming a water-stopping layer in advance.
JP 2005-73422 A

  However, since the water-stopping agent such as cyanoacrylate described above is a room temperature curing type, there is a problem that it takes a lot of labor to manage the material. In addition, since such a water-stopper application facility is required, there is a problem that facility management is required and the facility cost is increased.

  The present invention aims to solve such problems. That is, an object of the present invention is to provide a wire harness that can easily and reliably stop water between wires.

  In order to solve the above-mentioned problems and achieve the object, the invention described in claim 1 is a wire harness including a wire bundle composed of a plurality of electric wires, and is attached to a predetermined position of the wire bundle, and the predetermined position A positioning member that positions the plurality of electric wires in a state of being separated from each other, a water stop portion that is formed by filling a gap between the electric wires in the predetermined position with a water stop agent, and stops the gap. It is the wire harness characterized by having provided.

  According to a second aspect of the present invention, in the wire harness according to the first aspect, the positioning member includes a through hole through which a single electric wire passes, and the through hole includes a plurality of spaced apart holes. A wire harness characterized by being provided.

  According to a third aspect of the present invention, in the wire harness according to the first aspect, the positioning member is provided with a plurality of through-holes through which one electric wire passes, and a plurality of the positioning members are provided. It is a wire harness.

  According to a fourth aspect of the present invention, in the wire harness according to the second or third aspect, the positioning member is made of an elastic material, and the outer surface of the positioning member and the inner surface of the through-hole are A wire harness comprising a slit formed between the outer surface of the positioning member and passing through the electric wire into the through hole.

  According to the first aspect of the present invention, the positioning member which is attached to the predetermined position of the wire bundle and positions the plurality of electric wires in the predetermined position apart from each other, and the gap between the respective electric wires in the predetermined position. And a water stop portion formed by filling the water stop agent to stop the gap. For this reason, each electric wire is positioned with a sufficient gap by the positioning member, and a liquid such as water does not enter the gap by capillary action as in the conventional case. Furthermore, even a relatively high-viscosity water-stopping agent such as a hot melt agent is surely filled into this gap to form a water-stopping portion, so that a conventional room temperature-curing water-stopping agent such as cyanoacrylate can be used. Without using a water-stopping agent that requires such material management and coating equipment, it is possible to stop water between the wires easily and reliably.

  According to the invention described in claim 2, since the positioning member has a through-hole through which one electric wire passes and a plurality of the through-holes are provided at intervals, the inside of each through-hole is The passed electric wire is positioned with a sufficient gap, and the gap can be surely filled with a water-stopping agent to form a water-stop portion.

  According to the third aspect of the present invention, since the positioning member is provided with a plurality of through-holes for passing one electric wire therein, the electric wires that pass through the through-holes of the respective positioning members are surely provided. It is possible to form a water-stopping agent by reliably filling the gap with a water-stopping agent.

  According to the invention described in claim 4, the positioning member is made of an elastic material and includes a slit formed between the outer surface of the positioning member and the inner surface of the through hole. The electric wire can be passed through the through hole. Therefore, the electric wire can be easily passed through the through hole, and the positioning member can be easily attached to a predetermined position of the electric wire bundle.

  Hereinafter, a wire harness 1A according to a first embodiment of the present invention will be described with reference to FIGS. 1 A of wire harnesses concerning 1st embodiment of this invention are routed to the motor vehicle as a mobile body, for example. As shown in FIGS. 1 and 2, the wire harness 1 </ b> A includes an electric wire bundle 2, a positioning member 3 </ b> A, and a water stop portion 4.

  The electric wire bundle 2 includes a plurality of electric wires 20. As shown in FIG. 1 and the like, the electric wire 20 includes a core wire 21 made of a conductive material and a covering portion 22 made of an insulating material. The core wire 21 is formed by twisting a plurality of strands (not shown). The element wire is made of a conductive metal such as copper or aluminum. In the illustrated example, the number of the electric wires 20 is four, but the number of the electric wires 20 may be any number as long as it is plural. Moreover, the core wire 21 may be comprised from one strand.

  The covering portion 22 is made of, for example, an insulating synthetic resin such as polyvinyl chloride resin or polypropylene resin. The covering portion 22 covers the core wire 21. For this reason, the outer peripheral surface of the coating | coated part 22 has comprised the outer peripheral surface of the electric wire 20. FIG. At the end of the electric wire 20, a part of the covering portion 22 is peeled off and removed, and the core wire 21 is exposed.

  In the electric wire bundle 2 described above, the core wires 21 exposed from the ends of the plurality of electric wires 20 are joined to each other. The joint portion between the core wires 21 and the joint portion 23 are referred to. The joint portion 23 is formed by ultrasonic welding or resistance welding between the exposed core wires 21. The joint portion 23 electrically connects the core wires 21 to each other and electrically connects the plurality of electric wires 20 to each other.

  The positioning member 3A is made of an elastic material such as rubber or a thermoplastic elastomer. As shown in FIG. 3, the positioning member 3 </ b> A includes a disk-shaped main body 30 </ b> A and a through hole 31 that penetrates the main body 30 </ b> A. The through-hole 31 has a circular planar shape and penetrates through the center of the main body 30A along the thickness direction of the main body 30A. The through-hole 31 passes one electric wire 20 inside. The inner diameter of the through hole 31 is formed slightly smaller than the outer diameter of the covering portion 22 of the electric wire 20, and the outer peripheral surface of the covering portion 22 of the electric wire 20 passed through the through hole 31 is the same as the inner surface of the through hole 31. In close contact.

  The above-described through holes 31 are provided corresponding to the number of the electric wires 20 constituting the electric wire bundle 2. In the present embodiment, the same number (four) of the through holes 31 as the number of the electric wires 20 are provided, and a plurality of the through holes 31 are provided. The plurality of through holes 31 are provided at intervals. And each through-hole 31 lets arbitrary one electric wire 20 of the four electric wires 20 which comprise the electric wire bundle 2 pass inside.

  3 A of positioning members mentioned above are attached to the edge part of the wire bundle 2, and position the some electric wire 20 in the edge part of the wire bundle 2 in the state which mutually separated. This “separated state” indicates a state where the water-stopping agent such as a hot-melt resin having a relatively high viscosity, which will be described later, can be reliably distributed.

  The water stop part 4 is comprised with water stop agents, such as hot-melt resin. Examples of the hot melt resin include thermoplastic elastomers, thermoplastic resins such as polypropylene resins, polyethylene resins, and acrylic resins. Such a water stop agent is melted by being heated, and is filled in the gaps of the electric wires 20 in this molten state. Then, it cools and solidifies at room temperature (or semi-solidifies), the said gap | interval is stopped, and between the electric wires 20 is stopped.

  The water stop part 4 mentioned above is formed using the metal mold | die 5, as shown in FIG. The mold 5 includes a mold body 50 and a recess 51 formed in a recess from the outer surface of the mold body 50. The recess 51 is formed in a cylindrical shape. The water stop portion 4 is formed by positioning the end of the wire bundle 2 in the recess 51 and filling the melted water stop agent in the recess 51. The water stop part 4 is formed in the cylindrical shape. The water stop portion 4 is formed so as to cover the entire end portion of the wire bundle 2, waterproofs the outer peripheral surface of the joint portion 23 and the end portion (of the electric wire 20) of the electric wire bundle 2, and provides a gap between the electric wires 20. Stop water.

  A method for water stopping (waterproofing) the wire harness 1A will be described with reference to FIGS. First, the end portion of each electric wire 20 of the electric wire bundle 2 is peeled to expose the core wire 21, and the electric wires 20 are respectively connected to the positioning members 3 </ b> A along the arrow A <b> 1 (FIG. 4, the central axis direction of the through hole 31). Then, the positioning member 3A is attached to the end of the wire bundle 2 (FIG. 5).

  Thereafter, the exposed core wires 21 are joined together to form a joined portion 23, and the adhesive tape 6 is wound around the wire bundle 2 on the opposite side of the joined portion 23 with the positioning member 3A interposed therebetween to bundle these wires 20 (FIG. 6). . Then, the electric wires 20 in the vicinity of the positioning member 3A are arranged in a birdcage shape, and a sufficiently large gap is formed between the electric wires 20 in the vicinity of the positioning member 3A.

  And the edge part of this electric wire bundle 2 is positioned in the metal mold | die 5, and the water-stopping agent fuse | melted in this metal mold | die 5 is filled, and the water stop part 4 is formed (FIG. 7). The water-stopping agent spreads reliably in the gap between the electric wires 20. At this time, it is preferable to prevent the portion of the wire bundle 2 around which the adhesive tape 6 is wound from entering the mold 5. This is because the gap between the electric wires 20 in the portion where the adhesive tape 6 is wound is small, and there is a possibility that the water-stopping agent may not be sufficiently distributed in the gap. Then, after cooling and solidifying the water-stopping agent, it is taken out from the mold 5 (FIG. 8). As described above, the end of the wire bundle 2 is water-stopped (waterproof), and the wire harness 1A is water-stopped (waterproof).

  According to this embodiment, the positioning member 3 </ b> A that is attached to the end of the wire bundle 2 and positions the plurality of wires 20 at the end apart from each other, and each of the wires 20 at the end of the wire bundle 2. A water stop portion 4 is provided which is formed by filling the gap with a water stop agent and stops the entire end of the wire bundle 2 including the gap. For this reason, each electric wire 20 is positioned with a sufficient gap by the positioning member 3A, and a liquid such as water does not enter the gap by a capillary phenomenon as in the prior art. Furthermore, even a relatively high-viscosity water-stopping agent such as a hot melt agent is surely filled in the gap to form the water-stopping portion 4, so that a conventional room temperature-curing water-stopping agent such as cyanoacrylate is used. Without using a water-stopping agent that requires such material management and coating equipment as described above, the ends of the wire bundle 2 can be waterproofed and water can be stopped between the wires 20 without fail.

  Since the positioning member 3A has a through hole 31 through which one electric wire 20 passes, and a plurality of the through holes 31 are provided at intervals, the electric wires 20 that have passed through the respective through holes 31 are surely provided. Positioning is performed in a state having a sufficient gap, and the water stop portion 4 can be formed by reliably filling the gap with a water stop agent.

  In the present embodiment, the positioning member 3 </ b> A is attached to the end of the wire bundle 2, and the water stop portion 4 is provided at the end of the wire bundle 2. However, in the present invention, the positioning member 3A may be attached to the center of the wire bundle 2 (predetermined position other than the end portion), and the water stop portion 4 may be provided at the center of the wire bundle 2 (predetermined position other than the end portion). . In the present embodiment, the positioning member 3A is made of an elastic material. However, the positioning member 3A may be made of an inelastic material such as a thermoplastic resin. Moreover, in this embodiment, although the adhesive tape 6 was wound around the wire bundle 2, the adhesive tape 6 does not need to be wound.

  Further, in the present embodiment, four through holes 31 having the same number as the number of the electric wires 20 are provided in the positioning member 3A. However, in the present invention, for example, three through holes 31 (that is, one less than the number of the electric wires 20) may be provided. In this case, it is possible to reliably form a sufficient gap between the electric wires 20 by arranging the electric wires 20 that do not pass through the through holes 31 outside the positioning member 3A. In the present embodiment, the inner diameter of the through hole 31 is smaller than the outer diameter of the electric wire 20, but the inner diameter of the through hole 31 may be larger than the outer diameter of the electric wire 20.

  Next, a wire harness according to a second embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the same component as 1st embodiment mentioned above, and description is abbreviate | omitted.

  As shown in FIG. 9, a slit 32 is further formed in the positioning member 3B of the wire harness according to the second embodiment of the present invention. The slits 32 are provided corresponding to the respective through holes 31. The slit 32 is formed between the outer peripheral surface (outer surface) of the positioning member 3B and the inner surface of the through hole 31, and the outer periphery of the positioning member 3B can be passed through the through hole 31 from the outer peripheral surface of the positioning member 3B. It is formed by cutting the main body 30A between the surface and the inner surface. The slit 32 may have a width narrower than the inner diameter of the through hole 31 and may be formed by notching between the outer peripheral surface of the positioning member 3 </ b> B and the inner surface of the through hole 31.

  When passing the electric wire 20 into the through hole 31 of the positioning member 3B described above, first, the electric wire 20 is pushed in along the arrow A2 (FIG. 9, radial direction of the through hole 31) from the outer peripheral surface of the positioning member 3B. . Then, the walls 33 and 33 on both sides of the slit 32 are elastically deformed and opened to allow the electric wire 20 to pass therethrough. Thereafter, when the electric wire 20 is passed through the through hole 31, the slit 32 is elastically restored, and the walls 33, 33 on both sides of the slit 32 are closed. Then, the electric wire 20 is held in the through hole 31. In this way, the electric wire 20 can be passed through the through hole 31 from the outer peripheral surface of the positioning member 3 </ b> B by the slit 32.

  According to the present embodiment, in addition to the effects of the first embodiment described above, the positioning member 3B is made of an elastic material, and a slit formed between the outer surface of the positioning member 3B and the inner surface of the through hole 31. 32 is provided, the electric wire 20 can be passed through the through hole 31 from the outer surface of the positioning member 3B. Therefore, the electric wire 20 can be easily passed through the through-hole 31, and the positioning member 3B can be easily attached to a predetermined position of the electric wire bundle 2.

  Next, a wire harness according to a third embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same component as 1st and 2nd embodiment mentioned above, and description is abbreviate | omitted.

  As shown in FIG. 12, the positioning member 3C of the wire harness 1C according to the third embodiment of the present invention includes a columnar main body 30C and a through hole 31 penetrating the main body 30C. The through-hole 31 has a circular planar shape and penetrates the center of the main body 30C along the central axis direction of the main body 30C. One through hole 31 is provided. And this positioning member 3C is provided corresponding to the number of the electric wires 20 which comprise the electric wire bundle 2. As shown in FIG. As shown in FIGS. 10 and 11, the number of positioning members 3 </ b> C is the same as the number of wires 20 (four), and a plurality of positioning members 3 </ b> C are provided.

  When water stopping the wire harness 1C using the plurality of positioning members 3C described above, first, the electric wires 20 are passed through the through holes 31 of the positioning members 3C, and the positioning members 3C are attached to the electric wires 20. . Thereafter, similarly to the first embodiment described above, the exposed core wires 21 are joined together to form the joint portion 23. Moreover, the adhesive tape 6 is wound around the opposite side of the joint portion 23 with the positioning member 3 </ b> C of these electric wires 20 interposed therebetween, and these electric wires 20 are bundled.

  Then, the outer peripheral surfaces of the positioning members 3C overlap each other, and the electric wires 20 in the vicinity of the positioning members 3C are arranged in a birdcage like the first embodiment described above, and between the electric wires 20 in the vicinity of the positioning members 3C. A sufficiently large gap is formed. Then, the water stop part 4 is formed similarly to 1st embodiment.

  According to this embodiment, the positioning member 3C that is attached to the end portion of the wire bundle 2 and positions the plurality of wires 20 at the end portions apart from each other, and each wire 20 at the end portion of the wire bundle 2 A water stop portion 4 is provided which is formed by filling the gap with a water stop agent and stops the entire end of the wire bundle 2 including the gap. Therefore, each electric wire 20 is positioned with a sufficient gap by the positioning member 3C, and a liquid such as water does not enter the gap by a capillary phenomenon as in the conventional case. Furthermore, even a relatively high-viscosity water-stopping agent such as a hot melt agent is surely filled in the gap to form the water-stopping portion 4, so that a conventional room temperature-curing water-stopping agent such as cyanoacrylate is used. Without using a water-stopping agent that requires such material management and coating equipment as described above, the ends of the wire bundle 2 can be waterproofed and water can be stopped between the wires 20 without fail.

  Since the positioning member 3C is provided with a plurality of through-holes 31 through which one electric wire 20 passes, the electric wires 20 that pass through the through-holes 31 of the respective positioning members 3C surely have a sufficient gap. In this state, the water-stopper can be formed by reliably filling the gap with the water-stopper.

  The positioning member 3 </ b> C of the present embodiment may be a positioning member 3 </ b> D having a slit 32 as shown in FIG. 13, as in the second embodiment described above. The slits 32 allow the electric wires 20 to be pushed into the through holes 31 by pushing the electric wires 20 along the arrow A <b> 2 from the outer peripheral surface of each positioning member 3 </ b> D. Therefore, the electric wire 20 can be easily passed through the through-hole 31, and the positioning member 3D can be easily attached to the predetermined position of the electric wire bundle 2.

  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 perspective view showing a wire harness concerning a first embodiment of the present invention. It is sectional drawing along the II-II line | wire in FIG. (A) It is a top view of the positioning member shown by FIG. (B) It is a perspective view of the positioning member shown by FIG. It is a side view which shows the state just before a positioning member is attached to an electric wire bundle. It is a side view which shows the state by which the positioning member was attached to the wire bundle shown by FIG. FIG. 6 is a side view illustrating a state in which a joint portion is formed on the wire bundle illustrated in FIG. 5. It is a side view which shows the state in the middle of the water stop part being formed in the wire harness shown by FIG. It is a side view which shows the state in which the water stop part was formed in the wire harness shown by FIG. It is a top view which shows the cylindrical member of the wire harness concerning 2nd embodiment of this invention. It is a perspective view which shows the wire harness concerning 3rd embodiment of this invention. It is sectional drawing along the XI-XI line in FIG. (A) It is a top view of the positioning member shown by FIG. (B) It is a perspective view of the positioning member shown by FIG. It is a top view which shows the modification of the positioning member shown by Fig.12 (a).

Explanation of symbols

1A, 1C Wire harness 2 Wire bundle 3A, 3B, 3C, 3D Positioning member 4 Water stop 20 Electric wire 31 Through-hole 32 Slit

Claims (4)

In a wire harness provided with a bundle of wires composed of a plurality of wires,
A positioning member attached to a predetermined position of the wire bundle and positioning the plurality of electric wires in the predetermined position apart from each other;
A wire harness, comprising: a water stop portion that is formed by filling a gap between the respective electric wires at the predetermined position with a water stop agent to stop the gap. The positioning member includes a through hole through which one electric wire passes,
The wire harness according to claim 1, wherein a plurality of the through holes are provided at intervals.   2. The wire harness according to claim 1, wherein the positioning member includes one through hole through which one electric wire passes and a plurality of the through holes are provided. The positioning member is made of an elastic material,
4. The slit according to claim 2, further comprising a slit that is formed between an outer surface of the positioning member and an inner surface of the through hole and passes an electric wire from the outer surface of the positioning member into the through hole. Wire harness.

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