JP2006085950A - Wire bundling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily bind a plurality of electric wires in a state where resin wires are completely filled without causing a pinhole (gap) between adjacent electric wires, and to achieve sufficient waterproof performance of a bundling portion of electric wires. Providing a method for bundling electric wires.
SOLUTION: A resin tape is wound around a portion to be a binding portion of each electric wire, a plurality of electric wires are gathered at the binding portion, and the resin tape is melted by heating the binding portion. An electric wire bundling method characterized by fusing and integrating electric wires.
[Selection] Figure 1

Description

  The present invention relates to a wire bundling method for bundling a plurality of electric wires, and more specifically, a plurality of electric wires can be bundled in a state where there is no gap between adjacent electric wires and completely filled with a resin material, and a bundling portion of electric wires The present invention relates to a simple wire bundling method that ensures a sufficient waterproof performance.

  Conventionally, a plurality of electric wires passed through a hole in a partition wall that partitions between an engine room and a driver's seat of an automobile are bundled with a sealing material in order to prevent water from entering from a gap between the electric wires. Things have been done. As a binding method in this case, several methods are known. For example, there is a method of integrating the electric wires by injecting liquid urethane or silicon resin between the electric wires and solidifying them. Further, there is a proposal of a method of using a sealing material molded in a comb shape as shown in FIG. 3 (see Patent Document 1). In this method, the wire binding planned portion is inserted into the groove of the sealing material molded in a comb shape. And hold all the electric wires to be bound by a plurality of sealing materials, and then fit the elastic grommet made of heat-resistant rubber to which a magnetic body having an elastic contraction force is added to the outer periphery of the binding expected portion of the electric wires, A plurality of electric wires are constrained by pressurizing the outer circumference of the portion where the electric wires are to be bound by the elastic contraction force (see FIG. 4). Further, a high frequency is applied to the sealing material from the outside of the grommet, and the magnetic material that is a constituent material of the grommet is induction-heated in the alternating magnetic field, and the sealing material is melted by the generated heat, and at the same time, A plurality of electric wires are bundled by pressurizing a molten encapsulant material and flowing between the electric wires by elastic contraction force.

  There is also a proposal of a method of using a wire holding material processed into a corrugated plate so that hot melt can be bent in an annular shape as a sealing material (see Patent Document 2). As shown in FIG. 5, the hot melt which is a sealing material used in this method has a plurality of electric wire holding members (corrugated valley portions) adjacent to each other via an R-shaped hinge. The member is formed to be able to be bent in an annular shape via a hinge. Each holding member has a substantially C-shaped cross section and can hold one electric wire at a time. Then, when binding the electric wires, the electric wires are held one by one in the C-shaped portion of each holding member, and as shown in FIG. After the heat-shrinkable tube is wound around the outer periphery, the heat-shrinkable tube and hot melt are heated with hot air or the like. As a result, the hot melt melts and wraps around between the wires, filling the gaps between the plurality of wires and completing the binding.

JP-A-9-27221 Japanese Patent Laid-Open No. 2000-188024

  However, in these conventional methods, basically, before the sealing material or hot melt is melted, the periphery of the electric wire is sealed or hot melt (that is, the molten material constituting them). There is a part that is not covered, and there is a possibility that the wires touch each other. Moreover, there is a possibility that the electric wires are separated from the held portion and the electric wires come into contact with each other. When the material is melted in such a state and a plurality of electric wires are bundled, the molten material does not enter the gap formed by the adjacent electric wires, and the molten material is not filled between the electric wires. There may be gaps. For example, when three electric wires are bundled as shown in FIG. 7, a pinhole that is not filled with a molten material may be generated between the three electric wires, and this pinhole provides waterproofness of the bundling portion. There is concern about the decline.

  Accordingly, the object of the present invention is to easily bind a plurality of electric wires in a state where the adjacent electric wires are completely filled with a resin material without causing the pinhole (gap) as described above. An object of the present invention is to provide an electric wire binding method capable of achieving sufficient waterproof performance of an electric wire binding portion.

  As a result of intensive studies to solve the above problems, the present inventors selected a resin tape having an appropriate melting point, thickness, size, etc. as a sealing material, and bound the resin tape According to the method of winding one by one around a desired position (bundling part) of a plurality of electric wires, collecting a plurality of electric wires at this bundling part, and heating the part where the tape is wound, the molten resin is surely The present inventors have found that a bundled electric wire that fills the gaps between the electric wires and has an excellent waterproof effect can be obtained.

  That is, the above object is achieved by the present invention described below. The present invention is (1) wrapping a resin tape around each wire to be a binding site, collecting a plurality of wires at the binding site, melting the resin tape by heating the binding site, A wire bundling method characterized in that a plurality of wires are fused and integrated.

  Preferred forms include the following. (2) The electric wire binding method according to the above (1), wherein an adhesive is applied to one side or both sides of the resin tape. (3) The electric wire binding method according to the above (1) or (2), wherein a plurality of electric wires are further collected at a binding site, the binding site is inserted into a heat shrinkable tube, and the heat shrinkable tube is heated. (4) The electric wire binding method according to any one of (1) to (3), wherein the magnetic powder is mixed in the resin tape or the resin tape and the heat shrinkable tube, and the heating is performed by high frequency.

  In another embodiment of the present invention, (5) an electric wire wrapped with a resin tape coated with an adhesive on one or both sides thereof is prepared in advance, and the required number of electric wires at the time of bundling the wires In summary, the wire binding method is characterized by melting the resin tape by heating the binding portion and fusing and integrating a plurality of wires.

  Although the electric wire binding method of the present invention is a simple method, the molten resin surely fills the gaps between the electric wires, and a bonded electric wire having an excellent waterproof effect can be obtained. First, the resin tape used in the present invention can be easily wound around a desired portion of the electric wire, and the winding thickness of the tape can be easily adjusted by changing the number of times the resin tape is wound. For this reason, by winding a resin tape around an electric wire so as to be in an appropriate state, by heating and fusing the resin tape wound around each electric wire, a plurality of electric wires are bound without generating a gap between the electric wires. be able to. Further, as a preferred embodiment of the present invention, the resin tape can be reliably wound around a desired portion of the electric wire by applying an adhesive to one or both sides of the resin tape. Furthermore, according to the present invention in which an electric wire in a state in which a resin tape as a sealing material is wound in advance is prepared, the trouble of attaching the sealing material to the electric wire at the work site can be saved, and the process time can be shortened. Thus, a bundled electric wire can be obtained easily.

  Next, the present invention will be described in more detail with reference to preferred embodiments. The electric wires used in the present invention are those conventionally used, but are usually insulated and coated with polyvinyl chloride resin, crosslinked polyethylene or the like. In the present invention, a resin tape is wound around such an electric wire, and the resin tape is used as a sealing material for the electric wire. Accordingly, it is preferable to use a resinous tape having good adhesion to the insulating coating material. It is preferable to use a resin tape having an appropriate thickness and width so that a good binding site is formed when the resin tape is melted. The resin tape used in the present invention is preferably one in which an adhesive is applied on one side or both sides thereof. By using a resin tape coated with an adhesive, it becomes easier to wrap the resin tape in a desired thickness or width around a desired position of the electric wire.

  In the method according to the present invention, first, a resin tape is wound around a desired position (binding site) where a plurality of electric wires are to be bound. As a method of winding the resin tape around the electric wire, it may be wound by hand or may be performed using a winding device. The typical perspective view which shows the mode of the electric wire in the state by which the resin-made tape which is a sealing material used by this invention was wound was shown to Fig.1 (a). Next, in the method according to the present invention, a plurality of electric wires in a state in which such a resin tape is wound are collected at a binding site (see FIG. 1B). When a plurality of electric wires are bundled, they may be bundled.

  Next, the bundled portion in a combined state is heated to melt a resin tape as a sealing material, and a plurality of electric wires are fused and integrated. At this time, for example, by fixing a plurality of electric wires to be bundled with a jig, so as to be able to perform good heating in a state where a plurality of bundling portions wound with resin tape are gathered, What is necessary is just to heat by the method of spraying a hot air on a site | part. As other methods, as shown in FIG. 2, using a heat-shrinkable tube, inserting a plurality of electric wires into the heat-shrinkable tube, and a portion where a plurality of binding sites in which a resin tape is wound around the electric wires are combined, A method of heating the portion of the heat shrinkable tube by blowing hot air after the heat shrinkable tube is surrounded. According to the method using such a heat-shrinkable tube, the integration by fusion of the resin tape can be further promoted by the heat shrinkage of the heat-shrinkable tube.

  As another method, there is a method in which magnetic powder is mixed in advance in a resin tape or a heat-shrinkable tube which is a sealing material, and heating is performed at a high frequency. In this case, the magnetic powder is induction-heated by the high frequency, whereby the sealing material and the heat-shrinkable tube are heated, and the molten resin tape covers the periphery of the electric wire, and fuses and integrates it. A plurality of electric wires are bundled in a state in which the gap is eliminated.

  Further, in each of the above cases, if the heat-sealing of the resin tape is performed under reduced pressure, defects generated between the molten tapes can be further reduced. Further, when heated in a state where a plurality of bundled electric wires are inserted into an elastic material grommet having an elastic contraction force, the molten resin spreads in the length direction of the electric wires while filling the gaps between the electric wires. According to the above-described methods, the resin tape surely covers the electric wires by melting the resin tape, and there is no gap in the sealing material integrated by fusion. Thereby, the bundled electric wire excellent in waterproofness is obtained.

  The resin used for the resin tape, which is the sealing material used in the present invention, has heat melting property, adhesion to the insulation-coated electric wire (that is, affinity with the polymer for insulation coating), water resistance The resin is not particularly limited as long as the resin has excellent physical properties such as heat resistance. Examples of such resins include polyvinyl chloride, polyethylene, polypropylene, chlorinated polyethylene; ethylene-vinyl chloride copolymer, ethylene-vinyl chloride-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, ethylene-vinyl acetate copolymer, ethylene- Acrylic acid copolymer, ethylene-acrylic acid ester copolymer, ethylene-methacrylic acid copolymer, ethylene-methacrylic acid ester copolymer, ethylene-α-olefin copolymer, ionomer, ethylene-based copolymer such as ethylene-ethyl acrylate-maleic anhydride copolymer, polyurethane, Polyester, polyacetal resin, polyamide, polyarylate, thermoplastic elastomer, polyetheretherketone, polysulfone, poly -Tersulfone, polycarbonate resin, polystyrene resin, polyphenylene ether resin, polyphenylene oxide, polyphenylene sulfide, polybutadiene resin, polybutylene terephthalate, polymethylpentene resin, polybutylene, polyethersulfone, polyvinylidene chloride, polyethylene naphthalate, polyacrylonitrile, trans 1, 4-polybutadiene, trans 1,4-polyisoprene, isobutylene copolymer, ethylene-polypropylene copolymer, butadiene-styrene copolymer resin, acrylonitrile-butadiene copolymer resin, polypropylene copolymer, urethane copolymer, ester copolymer, amide copolymer, vinyl chloride Copolymer, epoxy resin, unsaturated polyester Resin, diallyl phthalate resin, silicone resin, phenol resin, polyimide resin, melamine resin, urea resin, fluorine resin, and the like. One resin selected from these resins, or a polymer blend of two or more resins Alternatively, a polymer alloy or the like is used.

  Resin tapes made of the materials mentioned above are flexible and soft, so it is very easy to wrap around an electric wire. As described above, if a tape coated with an adhesive is used on one or both sides of the tape, it is possible to effectively prevent the wound tape from falling off the electric wire, and the workability is further improved.

  Examples of the pressure-sensitive adhesive used in this case include ethylene-vinyl acetate copolymer-based, polyolefin-based, polyamide-based, polyester-based, acrylic (co) polymer-based, polyurethane-based hot-melt pressure-sensitive adhesives; polyvinyl chloride-based, epoxy Emulsion adhesives such as resin, ethylene-vinyl acetate copolymer, vinyl acetate-acrylic copolymer, and polyvinyl acetate; natural rubber, polyisoprene rubber, polybutadiene rubber, styrene-butadiene copolymer rubber, acrylonitrile-butadiene copolymer Polymer latex, methyl methacrylate-butadiene rubber, chloroprene rubber, butyl rubber, polyurethane rubber and other rubber latex adhesives; silicon adhesives and the like are used.

  According to the method of the present invention having the above-described configuration, when the resin tape that is the sealing material wound around the electric wire is melted by heating, the resin tape completely covers the periphery of each electric wire. Therefore, when the sealing materials are fused and integrated, there is no gap between the electric wires, and as a result, sufficient waterproofness at the binding site is achieved. Furthermore, according to the present invention, by preparing an electric wire in which a resin tape as a sealing material is wound in advance on the binding site, it is possible to work without attaching the sealing material to the electric wire at the work site. A plurality of electric wires can be bound in the above-described good state only by a very conceptual work of bundling a plurality of electric wires at a site and heating the binding portions with hot air or the like.

  Hereinafter, the present invention will be described in detail with reference to examples. As the sealing material, an organic solvent insoluble copolymer polyester resin tape (thickness 50 μm, width 25 mm) having an adhesive layer (butyl rubber adhesive) on the back surface was used. And this tape was wound around the desired position of the electric wire (outer diameter 2mm) which has a vinyl chloride resin insulation coating layer so that it might become a thickness of 0.25mm by hand. Furthermore, nine electric wires were prepared by winding the same resin tape around the same electric wires in the same manner as described above. Next, these 10 electric wires were bundled, and the portions to be bundled around which the resin tape was wound were put together, and this portion was covered with a heat-shrinkable tube. Next, both ends of this heat-shrinkable tube were fixed by wrapping an enameled wire, suspended vertically in an oven at 150 ° C. for 5 minutes to melt the resin tape, and 10 electric wires were fused and integrated.

  Next, the bundled electric wires were taken out from the oven and cooled, and then the bundled state was confirmed by the following method. One side of the binding site was immersed in water and pressurized from the opposite side at a pressure of 100 kPa for 1 minute. As a result, generation of bubbles was not observed, and it was confirmed that there were no gaps in the binding site. Moreover, when the binding part of the electric wire was cut with a cutter and the cross section was observed with an optical microscope, it was confirmed that the gap between the electric wires was filled with resin and there was no pinhole.

  The wire bundling method of the present invention can ensure a sufficient waterproof performance in the bundling portion, and is suitable for, for example, a case where a plurality of electric wires in an automobile or the like are bundled and wired through a partition wall between an engine room and a driver's seat. .

It is a perspective view explaining the state which wound the resin tape sealing material around the electric wire, and the state which put together the some electric wire. It is a schematic sectional drawing explaining the state which inserted the electric wire bundle wound with resin-made tape sealing materials in the heat contraction tube, and the state which heat-shrinked the heat contraction tube. It is a perspective view explaining the conventional sealing material. It is a schematic sectional drawing explaining the state which inserted the conventional sealing material in the elastic grommet. It is a perspective view explaining the conventional sealing material. It is a schematic sectional drawing explaining the state which inserted the conventional sealing material in the heat contraction tube. It is a schematic sectional drawing explaining the state which heat-melted the conventional sealing material and the pinhole generate | occur | produced between the electric wires.

Claims (5)

  A plastic tape is wound around each wire to be a binding site, a plurality of wires are gathered at the binding site, the binding site is heated to melt the resin tape, and a plurality of wires are fused. An electric wire bundling method characterized by integrating.   The electric wire binding method according to claim 1, wherein an adhesive is applied to one side or both sides of the resin tape.   Furthermore, the electric wire binding method of Claim 1 or 2 which puts together the several electric wire in a binding site | part, inserts this binding site | part in the heat shrinkable tube, and heats this heat shrinkable tube.   The electric wire binding method according to any one of claims 1 to 3, wherein the magnetic powder is mixed into the resin tape or the resin tape and the heat shrinkable tube, and the heating is performed by high frequency. Prepare an electric wire wrapped with resin tape coated with adhesive on one or both sides in advance, collect the required number of wires at the time of bundling at the bundling site, and heat the bundling site to make the resin An electric wire binding method comprising melting a tape and fusing and integrating a plurality of electric wires.

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