JP2020035525A - Wire with terminal and manufacturing method thereof - Google Patents

Abstract

To provide a compact wire with terminal of stable form and a manufacturing method thereof.SOLUTION: At least the rear end face (end face on the coating part 15 side) of a conductor connection part 7 is covered with a corrosion-proof material 17 circumferentially, and the coating part 15 removal end face (end face on the conductor connection part 7 side) of a coated conductor 11 is covered with the corrosion-proof material 17 circumferentially. Furthermore, at least the abutment part of barrels above the conductor connection part 7, and a conductor 13 projecting to the tip of the conductor connection part 7 are covered with the corrosion-proof material 17. Consequently, the conductor 13 exposed from the tip of the coating part 15 is covered entirely with the corrosion-proof material 17, and the conductor 13 is prevented from exposing to the outside by the corrosion-proof material 17. However, the corrosion-proof material 17 is not provided on the undersurface of the terminal 1, from at least a terminal contact part 3 to the front end face of the conductor connection part 7, and the terminal 1 is exposed.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a terminal-equipped electric wire used for, for example, automobiles and the like and a method for manufacturing the same.

  2. Description of the Related Art Conventionally, in the fields of automobiles, office automation equipment, home electric appliances, and the like, electric wires made of a copper-based material having excellent electric conductivity have been used as power lines and signal lines. In particular, in the field of automobiles, high performance and high functionality of vehicles are being rapidly promoted, and various electric devices and control devices mounted on vehicles are increasing. Accordingly, the number of electric wires with terminals used tends to increase accordingly.

  On the other hand, with the focus on environmental issues, there is a demand for lighter vehicles. Therefore, there is a problem of an increase in weight due to an increase in the use amount of the wire harness. For this reason, attention has been paid to lightweight aluminum electric wires in place of conventionally used copper wires.

  Here, a connection terminal is used at the time of connecting such electric wires or at a connection portion of devices or the like. However, even in the case of an electric wire with a terminal using an aluminum electric wire, copper having excellent electric characteristics may be used for the terminal portion in some cases due to the reliability of the connection portion. In such a case, an aluminum electric wire and a copper terminal are used by being joined.

  However, when different metals are brought into contact with each other, so-called electrolytic corrosion may occur due to a difference in the standard electrode potential. In particular, since the standard electrode potential difference between aluminum and copper is large, corrosion of the electrically-noble aluminum side progresses due to the effects of water scattering and dew condensation on the contact portion. For this reason, the connection state between the electric wire and the terminal in the connection portion becomes unstable, and the electric resistance increases due to an increase in the contact resistance and a decrease in the wire diameter. is there.

  For this reason, a method has been proposed in which the connection between the electric wire and the terminal is covered with an anticorrosive material. For example, a terminal-equipped electric wire in which a terminal fitting and an electric wire are connected, and a range from a connection portion between the terminal fitting and the electric wire to an end portion of the insulating coating of the electric wire, and provided with an insert-molded molded portion has been proposed. ing. (Patent Document 1).

JP-A-2015-156353

  However, in the method of Patent Document 1, an electric wire with a terminal is set in a mold, and a resin is injected into the mold at a predetermined pressure and cured. Therefore, the injection pressure of the resin is applied to the outer surface of the electric wire with terminal in the mold. For this reason, in order to suppress the leakage of resin from the gap between the mold and the terminal-attached wire, the outer surface near the contact portion of the terminal, which is a portion where the shape of the terminal-attached wire is stable, It is necessary to bring the mold into contact with the outer surface of the coating.

  As described above, since the mold and the terminal-equipped wire are brought into contact with each other, the mold resin covers the entire circumference from the vicinity of the contact portion to the covering portion of the covered conductor. Therefore, portions other than the connection portion between the conductor and the terminal are covered with the mold resin, and the size of the terminal portion is increased. In particular, since the molding resin is formed over the entire periphery of the outer surface of the terminal in the vicinity of the contact portion, it is necessary to take measures against floating of the contact portion with respect to the connection target.

  In addition, since the injection pressure of the resin is applied to the outer surface of the covering portion, the resin may bite into the covering portion, and the covering portion may be deformed. For this reason, for example, there is a possibility that the coating portion may be damaged after a durable load at a high temperature.

  Also, the resin may leak from the mold, the shape of the mold resin may vary, and the shape of the terminal-attached electric wire may not be stable.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a small and stable electric wire with a terminal and a method of manufacturing the same.

  In order to achieve the above-described object, a first invention is a terminal-equipped wire in which a covered conductor and a terminal are connected, wherein the covered conductor includes a covering portion and a conductor exposed from a tip of the covering portion. The terminal includes a terminal contact portion and a conductor connection portion to which the conductor is connected, at least a rear end surface of the conductor connection portion is covered with an anticorrosive material, and the covering portion of the covered conductor is removed. The end surface is circumferentially covered with the anticorrosion material, the conductive wire exposed from the tip of the covering portion is covered with the anticorrosion material, and a terminal lower surface from the terminal contact portion to at least a front end surface of the conductive wire connection portion is provided. An electric wire with a terminal, wherein the anticorrosive material is not provided and the terminal is exposed.

  A protection member may be formed so as to cover at least a part of the outer surface of the anticorrosion material from a portion near the rear end of the conductor connecting portion to the covering portion of the covered conductor.

  A mold for filling with the anticorrosive material is arranged so as to cover the anticorrosive material, the mold has optical transparency, and the mold has at least a portion from the conductor connecting portion to the covering portion of the covered conductor. It may function as a covering protection member.

  The anticorrosive material preferably has a tensile elongation at break at -40 ° C of 50% or more.

  It is preferable that the anticorrosive material has a shear adhesive strength to the covering portion and the terminal of 3 MPa or more.

  The anticorrosion material is desirably a photocurable resin.

  According to the first invention, at least the rear end surface of the conductor connection portion is covered with the anticorrosion material, and the removed end surface of the covering portion of the covered conductor is covered with the anticorrosion material circumferentially, so that the conductor is not exposed to the outside, High anticorrosion properties can be secured. In addition, since no anticorrosion material is provided on the lower surface of the terminal from the terminal contact portion to the front end surface of the conductor connection portion, when the terminal contact portion is connected to the connection target, interference between the anticorrosion material and the connection target is suppressed. can do.

  Also, on the outer surface of the anticorrosion material, the protective member is formed so as to cover from the vicinity of the rear end of the conductor connecting portion to the covering portion of the covering wire, so that when the covering wire is bent or heat shrinks, Cracking and peeling of the anticorrosion material can be suppressed.

  In addition, by using a light-transmitting mold for applying the anticorrosion material, the anticorrosion material can be easily applied to a predetermined position, and by leaving the mold as it is, the molding die is protected by a protective member. Can be used as

  Further, if the tensile elongation at break at −40 ° C. of the anticorrosive material is 50% or more, cracking and breakage of the anticorrosive material can be suppressed even in an environment where thermal expansion and contraction occurs.

  Further, if the shear adhesion strength of the anticorrosion material to the covering portion or the terminal is 3 MPa or more, peeling of the anticorrosion material or the like can be suppressed.

  Further, if the anticorrosive is a photocurable resin, it can be cured in a short time and does not require heat treatment.

  A second invention is a method for manufacturing a terminal-attached electric wire in which a covered conductor and a terminal are connected, wherein the covered conductor includes a covering portion, and a conductor exposed from a tip of the covering portion, Comprises a terminal contact portion and a conductor connection portion to which the conductor is connected, and has light transmissivity so as to cover at least from the vicinity of the tip of the conductor connection portion to the covering portion of the covered conductor. With a terminal, setting a mold made of a release material, filling the inside of the mold with an anticorrosion material, curing the anticorrosion material by light irradiation, and releasing the mold. This is a method for manufacturing an electric wire.

  According to the second invention, it is possible to easily manufacture a terminal-equipped electric wire capable of ensuring high anticorrosion performance.

  A third invention is a method of manufacturing a terminal-attached electric wire in which a covered conductor and a terminal are connected, wherein the covered conductor includes a covering portion and a conducting wire exposed from a tip of the covering portion, and the terminal Comprises a terminal contact portion and a conductor connection portion to which the conductor is connected, and has a light-transmitting molding so as to cover at least from the vicinity of the tip of the conductor connection portion to the covering portion of the covered conductor. A mold is set, an anticorrosion material is filled inside the molding die, the anticorrosion material is cured by light irradiation, and the molding die is used as a protective member that covers at least the conductor connecting portion to the covering portion of the covered conductor. The method for producing a terminal-attached electric wire, which is characterized by making it function, may be used.

  According to the third aspect, the form of the anticorrosion material is stable, and an electric wire with a terminal capable of ensuring high anticorrosion performance can be easily manufactured.

  ADVANTAGE OF THE INVENTION According to this invention, the electric wire with a terminal of a small and stable form and its manufacturing method can be provided.

The perspective view which shows the electric wire 10 with a terminal. (A) is sectional drawing which shows the electric wire 10 with a terminal, (b) is an enlarged view near the conductor connection part 7 of (a). 2A is a cross-sectional view taken along line BB of FIG. 2B, FIG. 2B is a cross-sectional view taken along line CC of FIG. 2B, and FIG. 2C is a cross-sectional view taken along line DD of FIG. Sectional view. (A) is a cross-sectional view showing the vicinity of the conductive wire connecting portion 7 in which the molding die 19 is arranged, and (b) is a cross-sectional view taken along the line EE of (a), showing a state after the anticorrosion material 17 is filled. FIG. 2C is a cross-sectional view taken along the line EE of FIG. 2A, showing a state where the mold 19 is released. (A) is a figure which shows other embodiment vicinity of the conductor connection part 7, (b) is FF sectional drawing of (a), (c) is GG sectional drawing of (a). (A) is a figure which shows other embodiment vicinity of the conductor connection part 7, (b) is HH sectional drawing of (a), (c) is II sectional drawing of (a). (A) is a figure which shows other embodiment vicinity of the conductor connection part 7, (b) is JJ sectional drawing of (a), (c) is KK sectional drawing of (a). (A) is a figure which shows the shaping | molding die 19a, (b), (c) is sectional drawing which shows the method of apply | coating the anticorrosion material 17 using the shaping | molding die 19a. The figure which shows the state which integrated the electric wire 10 with several terminals with the shaping | molding die 19a and the anticorrosion material 17. FIG. (A) is a figure which shows other embodiment vicinity of the conductor connection part 7, (b) is LL sectional drawing of (a).

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an electric wire with terminal 10, and FIG. 2A is a sectional view. FIG. 1 is a perspective view of the anticorrosion material 17. The electric wire with terminal 10 is configured by connecting the terminal 1 and the covered conductor 11.

  The covered conductor 11 includes a conductor 13 made of aluminum or an aluminum alloy, and a covering portion 15 covering the conductor 13. That is, the covered conductor 11 includes the covered portion 15 and the conductor 13 exposed from the tip. The conducting wire 13 is, for example, a stranded wire in which a plurality of strands are twisted.

  The terminal 1 is an open barrel type and is made of copper or a copper alloy. The terminal 1 is connected to a covered conductor 11. The terminal 1 is configured by connecting a terminal contact portion 3 and a conductor connecting portion 7 via a transition portion 5. The upper part of the transition part 5 located between the terminal contact part 3 and the conductor connection part 7 is open.

  The terminal contact part 3 is formed by forming a plate-shaped material having a predetermined shape into a tubular body having a rectangular cross section. The terminal contact part 3 has an elastic contact piece formed by folding a plate-shaped material into a rectangular cylinder inside. The terminal contact part 3 is connected by inserting a male terminal or the like from the front end. In the following description, an example is shown in which the terminal contact portion 3 is a female terminal that allows insertion of an insertion tab (not shown) such as a male terminal, but in the present invention, details of the terminal contact portion 3 are described. Is not particularly limited. For example, instead of the female terminal contact portion 3, for example, an insertion tab for a male terminal may be provided. Further, the terminal contact portion 3 may be a general round terminal or a front-open terminal instead of the male and female fitting type.

  The conductor connecting portion 7 is a portion to be crimped to the covered conductor 11, and before crimping, the terminal 1 has a substantially U-shaped barrel cross section perpendicular to the longitudinal direction. As described above, the covering portion 15 is peeled off from the tip of the covered conductor 11, and the inner conductor 13 is exposed. The conducting wire 13 from which the covering portion 15 is peeled off and exposed is crimped by the conducting wire connecting portion 7, and the conducting wire 13 and the terminal 1 are electrically connected at the conducting wire connecting portion 7.

  Serrations (not shown) may be provided in a part of the inner surface of the conductor connecting portion 7 in the width direction (direction perpendicular to the longitudinal direction). By forming the serrations in this manner, when the conductor 13 is crimped, the oxide film on the surface of the conductor 13 can be easily broken, and the contact area with the conductor 13 can be increased.

  FIG. 2B is an enlarged view of the vicinity of the conductor connecting portion 7 in FIG. 3A is a sectional view taken along line BB of FIG. 2B, FIG. 3B is a sectional view taken along line CC of FIG. 2B, and FIG. It is the DD sectional view taken on the line of (b).

  In the present invention, at least the rear end surface (the end surface on the side of the covering portion 15) of the conductor connecting portion 7 is circumferentially covered with the anticorrosive material 17, and the removed end surface of the covering portion 15 of the covered conductor 11 (the end surface on the side of the conducting wire connection portion 7). ) Are covered with the anticorrosion material 17 in a circumferential shape. That is, the conductor 13 between the front end surface of the covering portion 15 and the rear end surface of the conductor connection portion 7 is covered with the anticorrosion material 17 over the entire circumference.

  In addition, at least the butting portion between the barrels above the wire connecting portion 7 and the wire 13 projecting from the tip of the wire connecting portion 7 are covered with an anticorrosion material 17. Therefore, the entirety of the conductive wire 13 exposed from the tip of the covering portion 15 is covered with the anticorrosive material 17, and the conductive wire 13 is not exposed to the outside by the anticorrosive material 17. On the other hand, the anticorrosion material 17 is not provided on the lower surface of the terminal 1 from the terminal contact portion 3 to at least the front end surface of the conductor connecting portion 7 (range A in the figure), and the terminal 1 is exposed. In the illustrated example, the lower surface of the terminal 1 is exposed without being covered with the anticorrosion material 17 over the entire length of the terminal 1.

  The anticorrosion material 17 is desirably, for example, a photocurable resin, and an acrylate resin or a flexible rubber material can be used. At this time, the tensile elongation at break at −40 ° C. of the anticorrosion material 17 is desirably 50% or more. The tensile elongation at break of the anticorrosion material 17 at −40 ° C. can be measured according to JIS K6251 by preparing a sheet-shaped falling object of a resin material having a thickness of 200 μm.

  Further, it is desirable that the anticorrosion material 17 has a shear adhesive strength to the conducting wire 13, the covering portion 15 or the terminal 1 of 3 MPa or more. According to JIS K6850 "Testing method for tensile shear adhesive strength of adhesive", the adhesive strength of anticorrosion material 17 is determined by laminating a copper plate with tin plating and a glass plate, laminating an aluminum plate and a glass plate, and a flexible PVC plate. And a glass plate.

  Next, a method of manufacturing the electric wire with terminal 10 will be described. First, the covered conductor 11 and the terminal 1 are connected by crimping. Next, as shown in FIG. 4A, a mold for filling the anticorrosion material is formed so as to cover at least a portion where the conductor 13 is exposed from the covering portion 15 of the covering conductor 11 to the vicinity of the tip of the conductor connecting portion 7. Set 19

  The molding die 19 is made of a flexible release material having a light transmitting property to transmit light, and is made of, for example, transparent silicone. The molding die 19 is divided into two parts, and can be arranged so as to cover the entire periphery of the vicinity of the rear end portion of the conductor connection part 7 by combining them with each other.

  In addition, a plurality of projections (not shown) are formed in the circumferential direction of the inner surface of the molding die 19, and the projections come into contact with the outer peripheral surface of the conductor connecting portion 7 or the covering portion 15, so that the projections with respect to the conductor connecting portion 7 are formed. Positioning can be done. That is, a predetermined clearance can be formed in the circumferential direction between the inner surface of the molding die 19 and the outer peripheral surface of the conductor connecting portion 7 or the covering portion 15.

  The clearance corresponds to the final thickness of each part of the anticorrosion material 17, and is set, for example, to several μm to 500 μm. When the clearance is about 500 μm, the anticorrosion material 17 having excellent durability can be obtained. Further, if the clearance is set to about 100 μm, the clearance is compact, and interference between the anticorrosion material 17 and the connector cavity can be suppressed.

  Next, the anticorrosive material 17 is injected and filled into the inside of the molding die 19 from a filling port 21 provided in an upper part of the molding die 19. FIG. 4B is a cross-sectional view illustrating a state in which the anticorrosion material 17 is filled in a cross section taken along line EE of FIG. At this time, the viscosity of the anticorrosion material 17 is, for example, several hundred mPa · s to several thousand mPa · s at normal temperature, and is adjusted according to clearance or the like.

  When filling the mold 19 with the anticorrosion material 17, excessive pressurization is unnecessary. For example, conventionally, at the time of insert molding of a resin coating layer on a terminal using a mold, the resin is filled into the mold with an injection pressure of about 10 MPa. In this case, the resin bites into the coating portion, The coating may be deformed. In the present invention, the object to be applied is mainly applied by permeation by the surface tension of the anticorrosion material 17, the capillary force, etc., without applying excessive pressure such that the deformation of the mold or the anticorrosion material bites into the coating portion. An anticorrosion material 17 is formed on the entire surface of the part. For this reason, even if the flexible mold 19 is used, expansion and deformation of the mold 19 and deformation of the covering portion 15 due to the internal pressure are suppressed. When the clearance is not more than several tens of μm, for example, the anticorrosive material 17 may be heated to be injected at a viscosity of about several mPa · s to several hundred mPa · s.

  Note that the molding die 19 and the terminal 1 or the covering portion 15 do not completely adhere to each other, and a gap may be formed between them. Since the anticorrosion material 17 is filled into the mold at approximately normal pressure, by appropriately setting the viscosity and the clearance, the anticorrosion material 17 flows out of the gap due to the surface tension and the capillary force of the anticorrosion material 17. There is no. That is, the anticorrosion material 17 is filled with a pressure smaller than the surface tension and the capillary force of the anticorrosion material 17. Therefore, the anticorrosion material 17 can be efficiently disposed by the molding die even in a portion where the shape of the terminal after crimping becomes complicated, and the application of the anticorrosion material 17 to the lower surface of the terminal 1 can be suppressed. it can.

  Next, light irradiation is performed from outside the mold 19. Since the mold 19 has optical transparency, if the anticorrosion material 17 is a photocurable resin, the anticorrosion material 17 inside can be easily cured by light irradiation. The light irradiation may be performed again after releasing the mold 19 described later. By irradiating light after releasing the mold 19, the anticorrosion material 17 can be more reliably cured in a state where light energy does not attenuate when passing through the mold 19.

  Next, as shown in FIG. 4C, the mold 19 is split into two and released. At this time, since the mold 19 is excellent in the mold releasing property, the mold can be easily released. It should be noted that the excellent releasability means that the adhesive strength between the cured anticorrosive material 17 and the material of the molding die 19 is 1 MPa or less, for example, according to JIS K6850 “Testing method for tensile shear adhesive strength of adhesive”. Desirably.

  As described above, according to the present embodiment, at least the rear end face of the conductor connecting portion 7 is circumferentially covered with the anticorrosion material 17, and the removed end face of the covering portion 15 of the covered conductor 11 is circumferentially covered with the anticorrosion material. Since the conductor 13 is covered with the anticorrosive material 17 over the entire circumference, the conductor 13 from the end face of the covering part 15 to the rear end face of the conductor connection part 7 is covered. For this reason, high corrosion resistance can be ensured, and since the anticorrosion material 17 is not provided on the lower surface of the terminal from the terminal contact portion 3 to the front end surface of the conductor connection portion 7, the terminal contact portion 3 is connected to the connection target. In doing so, it is possible to suppress interference between the anticorrosion material 17 and the connection target.

  Further, since the tensile elongation at break at −40 ° C. of the anticorrosive material 17 is 50% or more, cracking and breakage of the anticorrosive material 17 can be suppressed even in an environment where thermal expansion and contraction is applied.

  Further, since the shearing adhesive strength of the anticorrosive material 17 to the bonding target portion is 3 MPa or more, peeling of the anticorrosive material 17 from a terminal or the like can be suppressed.

  In addition, by using the molding die 19, the anticorrosion material 17 having a stable shape can be easily formed. In particular, since the mold 19 is flexible, operations such as setting and releasing are easy. Further, since the anticorrosion material 17 is injected at substantially normal pressure, there is no deformation of the flexible mold 19 due to the internal pressure. In addition, since the mold 19 has optical transparency, the anticorrosion material 17 can be cured by easily irradiating light from the outside. Further, since the mold 19 has good releasability, it can be easily released. Further, since the molding die 19 is used, the thickness and the formation range of the anticorrosion material 17 can be accurately controlled.

  The mold 19 is not necessarily required if the anticorrosion material 17 can be applied with good control. The shape of the mold 19 is not limited to the illustrated example, and the shape of the mold 19 is not limited as long as the anticorrosion material 17 can be filled in the application range of the anticorrosion material 17. When the anticorrosion material 17 is made of a material other than the photocurable resin, the anticorrosion material 17 may be hardened by appropriately using a method such as heat. Alternatively, the mold 19 may be set after the anticorrosion material 17 is temporarily applied between the conductor connecting portion 7 and the covering portion 15, and the anticorrosion material 17 may be completely filled in the mold and cured.

  Next, a second embodiment will be described. FIG. 5A is a partial sectional view showing another embodiment of the electric wire with terminal, FIG. 5B is a sectional view taken along line FF of FIG. 5A, and FIG. It is a GG sectional view taken on the line of FIG. In the following description, components having the same functions as those in the first embodiment are denoted by the same reference numerals as those in FIGS. 1 to 4, and redundant description will be omitted.

  The second embodiment is different from the first embodiment in that a protection member 9 is further formed. The protection member 9 is formed so as to cover at least a part of the outer surface of the anticorrosion material 17 at least from the vicinity of the rear end of the conductor connecting portion 7 to the covering portion 15 of the covering conductor 11.

  The material of the same system as the anticorrosion material 17 can be used for the protection member 9, for example. In this case, the viscosity may be adjusted to have a different hardness. For example, the hardness of the protection member 9 may be higher than the hardness of the anticorrosion material 17.

  In addition, both the anticorrosion member 17 and the protection member 9 may be flexible rubber members. By doing so, the bendability at the conductor connecting portion 7 is excellent. For example, when a terminal such as a round terminal (such as a battery terminal) is used without being inserted into the connector cavity, a material having excellent bendability should be used because rigidity is not required at the end of the conductor connection portion 7. Can be.

  Further, as the protective member 9, a high-rigidity material (a material having a Young's modulus of several GPa, which is hard and has low elongation) may be used. By doing so, rigidity in the vicinity of the end of the conductor connecting portion 7 can be ensured. For example, in the case of a thin electric wire having a low rigidity, a certain rigidity is required for the electric wire / terminal portion when the electric wire / terminal portion is inserted into the connector cavity. Therefore, it is desirable to apply a material having high rigidity.

  Even if the anticorrosion material 17 and the protection member 9 are the same material and are completely integrated without a clear boundary, the formation timings of the two are different. Microscopic identification is also possible. Further, in order to distinguish between the anticorrosion material 17 and the protection member 9, the colors of both may be changed. Further, a photoinitiator having a different fluorescence wavelength spectrum may be added to the anticorrosion material 17 and the protection member 9. In this manner, the presence or absence of the protection member 9 can be easily detected.

  The protection member 9 can be formed using, for example, a molding die. In the illustrated example, the protection member 9 is substantially rectangular, but the shape is not particularly limited. The protection member 9 may be any size as long as it does not interfere with the connector cavity.

  Note that the protection member 9 may be formed below the covered conductor 11. 6A is a partial cross-sectional view showing another embodiment of the electric wire with terminal, FIG. 6B is a cross-sectional view taken along line HH of FIG. 6A, and FIG. FIG. 7 is a sectional view taken along line II of FIG.

  In the above-described example, the lower portion of the insulated wire 11 and the lower surface of the terminal 1 are arranged at substantially the same position, and the protection member 9 is formed so as not to protrude from the lower ends of the terminal 1 and the insulated wire 11. In the embodiment, the insulated conductor 11 is displaced slightly upward with respect to the lower end of the terminal 1, and the protection member 9 goes under the insulated conductor 11 in the displaced range. That is, the protection member 9 is disposed so as to cover the entire circumference of the covered conductor 11 near the tip of the covering portion 15. Also in this case, the protection member 9 and the anticorrosion material 17 do not protrude to the lower surface side of the terminal 1.

  FIG. 7A is a partial sectional view showing still another embodiment of the electric wire with a terminal, and FIG. 7B is a sectional view taken along line JJ of FIG. 7) is a sectional view taken along the line KK of FIG.

  In the present embodiment, the lower portion of the covered conductor 11 and the lower surface of the terminal 1 are arranged at substantially the same position, and the protection member 9 is formed so as to cover the entire circumference. That is, the protection member 9 is disposed so as to cover the entire periphery of the vicinity of the front end of the covering portion 15 of the covering conductor 11 and the vicinity of the rear end of the conductor connection portion 7. Even in this case, the protection member 9 and the anticorrosion material 17 do not protrude from the lower surface of the terminal 1 in front of the tip of the conductor connection portion 7 (toward the transition portion 5).

  According to the second embodiment, the same effect as in the first embodiment can be obtained. In addition, the protection member 9 can reinforce, for example, cracks and peeling between the anticorrosion material 17 and the terminal 1 and between the anticorrosion material 17 and the covering portion 15.

  In particular, if the lower part of the insulated wire 11 and the lower surface of the terminal 1 are arranged at substantially the same position and the protection member 9 is formed so as not to protrude from the lower ends of the terminal 1 and the insulated wire 11, the height is low. An electric wire with terminals can be obtained. In addition, by covering the entire periphery of the covered conductor wire 11 near the distal end face of the covered portion 15 with the protective member 9, the water stopping property at the end of the covered portion 15 can be improved. Furthermore, by covering the entire periphery near the rear end of the conductor connection portion 7 with the protective member 9, it is possible to improve the water stopping property at the end of the conductor connection portion 7.

  Next, a third embodiment will be described. FIGS. 8A to 8C are axial views illustrating another method for manufacturing the electric wire with terminal according to the third embodiment. In the present embodiment, a mold 19a for filling the anticorrosive material is used.

  As shown in FIG. 8A, the molding die 19a has a light transmitting property, and has substantially the same configuration as the molding die 19, but does not need the mold releasability for the anticorrosion material 17. Also, flexibility is not always necessary as in the molding die 19, and may have a certain degree of rigidity.

  First, as shown in FIG. 8 (b), a light-transmitting mold 19a is set so as to cover at least the vicinity of the distal end of the conductor connecting portion 7 to the covering portion 15 of the covering conductor 11. At this time, as shown, the molding die 19a is arranged so as not to protrude below the terminal 1.

  Next, as shown in FIG. 8C, the anticorrosion material 17 is filled into the inside of the mold 19a from the filling port 21 and the anticorrosion material 17 is cured by light irradiation. As described above, when the anticorrosion material 17 is filled, excessive pressurization is unnecessary.

  In the present embodiment, after the anticorrosion material 17 is cured, the molding die 19a is caused to function as a protective member that covers at least from the conductor connecting portion 7 to the covering portion 15 of the covered conductor 11 without releasing the molding die 19a. . That is, the molding die 19a disposed so as to cover the anticorrosion material 17 functions as a protection member that covers at least from the conductor connecting portion 7 to the covering portion 15 of the covering conductor 11, and achieves the same effect as the above-described protection member 9. be able to.

  According to the third embodiment, the same effects as in the second embodiment can be obtained. Further, since the mold 19a functions as a protective member, a separate step of forming the protective member 9 is not required.

  Note that the shape of the molding die 19a is not limited to the illustrated example, and for example, it may be arranged so as to partially cover the lower surface of the terminal 1 like a protective member 9 shown in FIG. Further, the mold 19a may be provided with an additional function other than the function of the anticorrosion material 17 as a protective member. For example, a fixing mechanism for restricting the movement of the terminal contact portion 3 or a connecting function for arranging and arranging a plurality of wires 10 with terminals may be provided.

  FIG. 9 is a diagram showing a state in which a plurality of electric wires with terminals 10 are integrated. FIG. 9 is a perspective view of the anticorrosion material 17 and the mold 19a. As shown in FIG. 9, in a state where a plurality of electric wires 10 with terminals are arranged in parallel, a molding die 19 a that covers these conductor crimping portions 7 is arranged, and a plurality of anticorrosion materials 17 are filled in the inside thereof. The electric wire with terminal 10 can be integrated. By doing so, the mold 19a can function as a connecting member for the plurality of electric wires with terminals 10 in addition to the function as the protective member.

  Alternatively, the mold 19a may be released after the anticorrosion material 17 is cured by integrating the anticorrosion material 17 alone. In addition, a plurality of electric wires with terminals 10 are covered with forming dies 19a in which the inside is partitioned for each electric wire with terminals 10, and an anticorrosion material 17 is individually applied to each of the electric wires with terminals 10, and each of the electric wires with terminals 10 is formed by the forming die 19a. The plurality of electric wires with terminals 10 covered with the anticorrosion material 17 may be integrated.

  As described above, the embodiments of the present invention have been described with reference to the accompanying drawings. However, the technical scope of the present invention is not affected by the above-described embodiments. It is clear that a person skilled in the art can conceive various changes or modifications within the scope of the technical idea described in the claims, and these naturally fall within the technical scope of the present invention. It is understood to belong.

  For example, the method of connecting the conductor connecting part 7 and the conductor 13 may not be crimping. FIG. 10A is a cross-sectional view showing a conductor connecting portion 7a according to another embodiment, and FIG. 10B is a cross-sectional view taken along line LL of FIG. 10A. The conductor 13 exposed from the tip of the covered conductor 11 is connected to the conductor connecting portion 7a by welding. In this case, the rear end surface of the terminal is the rear end surface of the conductor connection portion 7a. That is, even in this case, at least the rear end surface of the conductor connecting portion 7a is covered with the anticorrosion material 17, and the removed end surface of the covering portion 15 of the covered conductor 11 is covered with the anticorrosion material 17 in a circumferential shape. The conductive wire 13 exposed from is covered with the anticorrosion material 17. As described above, the form of the conductor connecting portion is applicable to any form. Furthermore, the present invention can be applied to a terminal having a coating crimping part in addition to the conductor connecting part.

  Needless to say, the above-described configurations can be combined with each other.

1 ... Terminal 3 ... Terminal contact part 5 ... Transition part 7, 7a ... Wire connecting part 9 ... Protective member 10 ... Electrical wire 11 with terminal ... Coated lead 13 ... Conducting wire 15 Coating part 17 Anticorrosion material 19, 19a Mold 21 Filling port

Claims (8)

An electric wire with a terminal to which the coated conductor and the terminal are connected,
The coated conductive wire includes a coated portion and a conductive wire exposed from a tip of the coated portion,
The terminal includes a terminal contact portion and a conductor connection portion to which the conductor is connected,
At least the rear end surface of the conductor connection portion is covered with an anticorrosion material, and the removed end surface of the covering portion of the covered conductor is covered with the anticorrosion material in a circumferential shape, and the conductor exposed from the front end of the covering portion is Covered with anticorrosive materials,
The terminal-equipped electric wire, wherein the anticorrosion material is not provided on a lower surface of the terminal from at least the terminal contact portion to a front end surface of the conductor connection portion, and the terminal is exposed.   The protection member is formed so as to cover at least a part of an outer surface of the anticorrosion material from a portion near a rear end surface of the conductor connecting portion to the covering portion of the covered conductor. An electric wire with a terminal according to the item. A mold for anticorrosion material filling is arranged to cover the anticorrosion material,
The mold has a light transmitting property,
The terminal-equipped electric wire according to claim 1, wherein the mold functions as a protective member that covers at least a portion from the conductor connection portion to the covering portion of the covered conductor.   The electric wire with a terminal according to any one of claims 1 to 3, wherein the anticorrosive material has a tensile elongation at break at -40 ° C of 50% or more.   5. The terminal-attached electric wire according to claim 1, wherein the anticorrosive material has a shear adhesive strength to the covering portion and the terminal of 3 MPa or more. 6.   The terminal-provided electric wire according to any one of claims 1 to 5, wherein the anticorrosion material is a photocurable resin. A method for manufacturing a terminal-equipped electric wire in which a coated conductor and a terminal are connected,
The coated conductive wire includes a coated portion and a conductive wire exposed from a tip of the coated portion,
The terminal includes a terminal contact portion and a conductor connection portion to which the conductor is connected,
At least, so as to cover from the vicinity of the distal end of the conductive wire connection portion to the coating portion of the coated conductive wire, having a light transmitting, set a mold made of a release material,
A method for manufacturing an electric wire with a terminal, characterized in that an anticorrosive material is filled inside the mold, the anticorrosive material is cured by light irradiation, and the mold is released. A method for manufacturing a terminal-equipped electric wire in which a coated conductor and a terminal are connected,
The coated conductive wire includes a coated portion and a conductive wire exposed from a tip of the coated portion,
The terminal includes a terminal contact portion and a conductor connection portion to which the conductor is connected,
At least, a molding die having a light transmitting property is set so as to cover from the vicinity of the distal end of the conductor connecting portion to the covering portion of the covered conductor,
Filling the inside of the mold with an anticorrosive material, curing the anticorrosive material by light irradiation, and functioning the mold as a protective member that covers at least from the conductor connection portion to the covering portion of the covered conductor. Manufacturing method of a terminal-attached electric wire.

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