JP5529953B2 - Manufacturing method of colored electric wire - Google Patents

Description

  The present invention relates to a method for producing a colored electric wire in which at least a part of an outer surface is colored.

  In order to transmit electric power and control signals to mounted electronic devices, automobiles are wired with wire harnesses. The wire harness includes a plurality of electric wires having a conductive core wire and an insulating covering portion that covers the core wire, a connector attached to an end portion of the electric wire, and the like.

  When assembling the wire harness, the electric wire is cut into a predetermined length, and then a terminal fitting is attached to the end of the electric wire. Thereafter, the terminal fitting is inserted into the connector housing. Thus, the wire harness described above is assembled. In the wire harness assembled in this way, the connector is connected to the connector of the electronic device, and supplies signals and electric power to the electronic device.

  On the other hand, it is desired to mount a wider variety of electronic devices on the above-described automobile, and the number of electric wires constituting the wire harness tends to increase. For this reason, when assembling a wire harness, the outer surface was conventionally colored by applying a coloring material to a part of the outer surface of the electric wire described above so that a plurality of electric wires can be identified ( For example, see Patent Document 1.)

JP 2006-49228 A

  However, the electric wire that has been subjected to the above-described coloring treatment has a problem that the coloring material is peeled off the electric wire when it is bent or rubbed. For this reason, when assembling a wire harness, there existed a problem that it became difficult to identify several electric wires.

  Therefore, an object of this invention is to provide the manufacturing method of the colored electric wire which can raise the adhesive force of the coloring material apply | coated to the outer surface of an electric wire.

  In order to achieve the above object, the invention described in claim 1 is a method of manufacturing a colored electric wire for manufacturing a colored electric wire in which a part of the outer surface is colored, wherein a needle is provided on a part of the outer surface. By forming a concavo-convex in a part of the outer surface by piercing, a coloring material is applied to a part of the outer surface on which the concavo-convex is formed, and a part of the outer surface is colored. It is a manufacturing method of the colored electric wire to do.

  According to the invention described in claim 1, after forming irregularities on a part of the outer surface of the electric wire, a coloring material is applied to a part of the outer surface on which the irregularities are formed, Since a part is colored, the adhesive force of the coloring material applied to the outer surface of the electric wire can be increased by the anchor effect, so that the coloring material can be prevented from peeling off the electric wire. Further, even when the coloring material is peeled off due to the outer surface of the electric wire being rubbed or the like, the coloring material remains in the recess of the outer surface, so that the colored electric wire can be identified. Moreover, since the unevenness is formed by piercing a part of the outer surface, the depth of the recesses (holes) of the unevenness, the number of the recesses, and the like can be accurately controlled.

It is a perspective view which shows the colored electric wire manufactured by the manufacturing method of the colored electric wire of this invention or a reference example. It is sectional drawing which follows the XX line in FIG. It is sectional drawing which shows the state from which the coloring material peeled from the colored electric wire shown by FIG. It is explanatory drawing explaining the manufacturing method of the colored electric wire of a reference example, and is explanatory drawing explaining the manufacturing method of the colored electric wire shown by FIG. It is explanatory drawing explaining the manufacturing method of the colored electric wire which concerns on one Embodiment of this invention, and is explanatory drawing explaining the manufacturing method of the colored electric wire shown by FIG. It is explanatory drawing explaining the manufacturing method of the colored electric wire which similarly concerns on one Embodiment of this invention, and is explanatory drawing explaining the manufacturing method of the colored electric wire shown by FIG.

  Hereinafter, although it is not this invention, the manufacturing method of the colored electric wire of the reference example used as a reference is demonstrated with reference to FIG.

  The manufacturing method of the colored electric wire of the reference example is such that after forming irregularities on the outer surface of the electric wire 1 using the shot blasting device 6 shown in FIG. 4, the outer surface on which the irregularities of the electric wire 1 are formed by a coloring device (not shown). The coloring material 5 is applied to the colored electric wire 10 shown in FIGS. 1 and 2. In addition, the colored electric wire 10 is mounted on an automobile and constitutes a wire harness that transmits electric power and signals between various electronic devices of the automobile.

  An electric wire 1 of the colored electric wire 10 includes a conductive core wire 2 formed by twisting a plurality of conductive wires, and an insulating covering portion 3 that covers the core wire 2. Further, in this specification, an electric wire that has not been subjected to a coloring process is simply referred to as “electric wire 1”, and an electric wire that has been subjected to a coloring process is referred to as “colored electric wire 10”.

  The said coating | coated part 3 is comprised with synthetic resins, such as a polyvinyl chloride (Polyvinylchloride: PVC), for example. The synthetic resin constituting the covering portion 3 is colored in a desired color by mixing various coloring materials. Moreover, you may make this synthetic resin uncolored, without mixing various coloring materials in the synthetic resin which comprises the coating | coated part 3. FIG. In this specification, the color of this coating | coated part 3 itself is called a ground color. Further, the outer surface of the covering portion 3 forms the outer surface of the electric wire 1, that is, the colored electric wire 10.

  A plurality of minute holes, that is, dents 4 are formed on a part of the outer surface of the covering portion 3 by a shot blasting device 6 described later. That is, unevenness due to the plurality of recesses 4 is formed on a part of the outer surface of the covering portion 3. Further, the recess 4 is a recess that is recessed from the outer surface of the covering portion 3 toward the core wire 2, and the depth thereof does not reach the core wire 2.

  Moreover, a part of the outer surface of the covering portion 3 in which the recess 4 is formed is colored with a coloring material 5 having a color different from the background color of the covering portion 3 described above. In the reference example, a linear marking extending along the longitudinal direction of the electric wire 1 is given by the coloring material 5. The colorant 5 is a paint in which a pigment as a colorant is dispersed in a solvent. Further, it is desirable that the coloring material 5 has an affinity with the synthetic resin constituting the covering portion 3.

  In the reference example, as described above, an unevenness, that is, a plurality of dents 4 are formed on a part of the outer surface of the covering portion 3 of the electric wire 1 and then a part of the outer surface on which the dents 4 are formed is colored. Since the material 5 is applied and a part of the outer surface is colored, the anchoring effect obtained by the coloring material 5 entering the recess 4 increases the adhesion of the coloring material 5 to the outer surface. Can do. Therefore, it can prevent that the coloring material 5 peels from the electric wire 1. FIG. Further, even when the coloring material 5 is peeled off by rubbing the outer surface, the coloring material 5 remains in the recess 4 on the outer surface as shown in FIG. can do. The anchor effect is the same in the present invention.

  Moreover, the manufacturing apparatus of the colored electric wire 10 described above includes a shot blasting device 6 shown in FIG. 4, a coloring device (not shown) for applying the coloring material 5 toward the outer surface of the electric wire 1, and the electric wire 1 along the longitudinal direction thereof. A travel device (not shown) that travels.

  The shot blasting device 6 is a well-known device that sprays a large number of abrasive grains 7 such as glass beads and metal particles onto the outer surface of a workpiece by spraying with a centrifugal fan. In the reference example, by using this shot blasting device 6, abrasive grains 7 are sprayed onto a part of the outer surface of the electric wire 1 that is traveling by the traveling device, so that unevenness due to the plurality of recesses 4 is continuously formed on the outer surface. To form.

  And the electric wire 1 by which the unevenness | corrugation was formed in the outer surface by the said shot blasting apparatus 6 is moved just under the said coloring apparatus by the said traveling apparatus, and, subsequently, the coloring material 5 on the outer surface of this electric wire 1 by this coloring apparatus. Is applied to produce the colored electric wire 10 shown in FIG.

  In the reference example, as described above, the shot blast device 6 is used to form irregularities on the outer surface of the electric wire 1, so that the electric wire 1 is sent out without stopping the traveling device so that irregularities are continuously formed. The productivity of the colored electric wire 10 can be improved.

  Then, the manufacturing method of the colored electric wire which concerns on one Embodiment of this invention is demonstrated with reference to FIG.5 and FIG.6. Also, in the figure, the same components as those in the reference example described above are denoted by the same reference numerals and description thereof is omitted.

  The manufacturing method of the colored electric wire which concerns on one Embodiment of this invention forms an unevenness | corrugation in the outer surface of the electric wire 1 using the drilling apparatus 8 shown in FIG.5 and FIG.6, Then, the coloring apparatus which is not shown in figure of this electric wire 1 This is a method of manufacturing the colored electric wire 10 shown in FIGS. 1 and 2 by applying the coloring material 5 to the outer surface on which the irregularities are formed.

  The punching device 8 includes a sword mountain-shaped punching member 81 having a plurality of needles 80 and a moving device (not shown) that moves the punching member 81 along the radial direction of the electric wire 1. In the present embodiment, as shown in FIG. 5, the four punching devices 8 are provided so that four punching members 81 surround the electric wire 1.

  As shown in FIG. 5, when the electric wire 1 is positioned at the center of the plurality of drilling members 81, the punching device 8 moves the plurality of drilling members 81 toward the electric wire 1 as shown in FIG. 6. By piercing the needle 80 into the outer surface of 1, irregularities due to the plurality of dents 4 are formed on the entire circumference of the electric wire 1.

  In the present invention, since the concavo-convex portions by the plurality of dents 4 are formed by piercing the outer surface of the electric wire 1 in this way, the depth of the dents 4 and the number of the dents 4 are accurately controlled. can do.

  Further, in the above-described embodiment, the concave and convex portions are formed on the outer surface of the electric wire 1 using the drilling device 8. However, in the present invention, for example, the above-described punching member 81 is pressed against the electric wire 1 by hand. Concavities and convexities may be formed on the outer surface of the electric wire 1.

  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.

5 Coloring material 7 Abrasive grain 10 Colored wire 80 Needle

Claims (1)

A method for producing a colored electric wire for producing a colored electric wire in which a part of the outer surface is colored,
By forming a concavo-convex in a part of the outer surface by piercing a part of the outer surface, a coloring material is applied to a part of the outer surface on which the concavo-convex is formed, A method for producing a colored electric wire, characterized by coloring a part.

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