JP2006202697A - Water-stopping treatment method of vehicle-mounted electric wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely carry out water-stopping treatment of vehicle-mounted wires in a simple operation without greatly increasing a volume of wire terminal parts. <P>SOLUTION: In applying water-stopping treatment, for instance, to a grounding wire 10, a colored water-stopping agent 56 with fluidity is supplied from an arrow mark A position of one of the terminals, and further, air inside a coating material 14 is sucked for decompression from the other terminal of the grounding wire 10 during or after supplying of the colored water-stopping agent 56 so that a part of the colored water-stopping agent 56 is kept exposed to one of the terminals of the grounding wire 10 and the other part is infiltrated inside the coating material 14. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technique for performing a water stop treatment on an in-vehicle electric wire mounted on a vehicle.

  Some of the on-vehicle electric wires are required to have high waterproof properties. For example, a grounding wire for connecting an electric circuit provided in a vehicle or the like to a grounding terminal is connected to a suitable grounding part (for example, a vehicle body) with the grounding terminal fixed to the terminal exposed to the outside. Therefore, moisture easily enters from the terminal, and if the moisture enters the circuit through the inside of the covering material, there is a possibility that normal operation of the circuit is hindered.

Therefore, as a method for performing a water-stop treatment of such an in-vehicle electric wire including the grounding electric wire, in Patent Document 1, a high-viscosity sealing resin is molded so as to cover the electric wire terminal to which the earth connection terminal is fixed. It is disclosed.
Japanese Patent Laying-Open No. 2001-167821 (page 4, FIG. 4)

  In the method of molding the resin around the wire terminal as described above, in addition to requiring labor and large equipment for the molding, the wire terminal is bulky, making wiring work difficult. For example, other ground connection terminals There is a drawback that it can not be overlapped with.

  An object of this invention is to perform the water stop process of a vehicle-mounted electric wire reliably by simple operation, without significantly increasing the volume of an electric wire terminal part.

  As means for solving the above-mentioned problems, the present invention provides a method for water-stopping an in-vehicle electric wire mounted on a vehicle, which is an electric wire having a coating material on the outside of a conductor, and one of the in-vehicle electric wires A water-stopping agent supplying step of supplying a water-stopping agent that has fluidity and a color to the terminal, and a part of the colored water-stopping agent is exposed to one terminal of the in-vehicle electric wire. A decompression step of sucking and decompressing the air inside the covering material from the other end of the in-vehicle electric wire during or after the supply of the colored water-stopping agent, so that the portion penetrates into the inside of the covering material; Is included.

  According to this method, in addition to the water-stopping agent supplying step of supplying the colored water-stopping agent to one terminal of the in-vehicle electric wire, the inside of the covering material is decompressed by sucking air from the other terminal of the in-vehicle electric wire. By performing the decompression process, the supplied colored water-stopping agent can be sufficiently infiltrated inside the coating material, and as a result, a reliable water-stopping treatment is realized without significantly increasing the volume of the wire end portion. can do. That is, in the in-vehicle electric wire that has been subjected to water-stopping treatment by the method, the water channel inside the covering material is surely blocked, and moisture enters the in-vehicle circuit from the one terminal through the in-vehicle electric wire. Can be prevented. Furthermore, since the water-stopping agent is colored and a part of the water-stopping agent is exposed at one end of the on-vehicle electric wire, the presence of the colored water-stopping agent can be visually observed from the outside even after the water-stopping treatment. It is possible to easily identify whether the electric wire has been processed.

  In addition, although the kind and arrangement | positioning location of the said vehicle-mounted electric wire are not specifically limited, As a preferable thing, the electric wire for earthing for connecting the circuit mounted in a vehicle to earth | ground is mentioned.

  According to this configuration, since the water stop treatment can be performed on the grounding wire, the ground is generally connected to the ground disposed at a location (for example, the body of the vehicle) that is easily affected by the external environment of the vehicle. It is possible to prevent moisture from entering from the terminal of the electric wire to the opposite terminal.

  However, the water-stop suction device according to the present invention is not limited to the grounding wire, and, for example, moisture can easily enter the coating material, such as a splice wire from which the coating material is peeled off in the middle of the wire. Even if the connector is provided with a waterproof function, the connector itself can be suitably used for a circuit connected to a circuit that requires a particularly high waterproof property.

  In this method, the water-stopping agent supplying step is a step of dropping the colored water-stopping agent on one end of the in-vehicle electric wire, and the dropping is performed while confirming whether the dropping is good or bad by an optical sensor. It may be there. That is, the presence of the colored water-stopping agent is detected by an optical sensor using the fact that the water-stopping agent is colored and its light transmittance is low. Thereby, since the water-stopping agent supply process can be performed while simply confirming that the colored water-stopping agent is dropped at a predetermined position, a more reliable water-stopping treatment can be realized.

  Moreover, the process of dripping the said colored water stop agent to the one terminal of the said vehicle-mounted electric wire using the dispenser which has the nozzle which accommodates the said colored water still agent, and the nozzle which becomes the exit of the said water stop supply process The upper surface of the colored water-stopping agent in the syringe may be covered with a protective liquid for preventing the water-stopper from solidifying. Thereby, solidification of the colored water stop agent in a syringe can be prevented, As a result, the dripping performance of a dispenser can be maintained and a water stop process defect can be prevented.

  As the protective liquid, it is preferable to use one that is colored in a different color from the colored water-stopping agent. Thereby, since it becomes easy to visually confirm the liquid level of the colored water-stopping agent, maintenance management can be facilitated.

  Moreover, as the colored water-stopping agent used in the above water-stop treatment method, it is preferable to use a water-stopping agent colored in black. Thereby, since light can be intercepted more reliably, the detection of the colored water stopping agent by an optical sensor can be made more reliable.

  As described above, according to the water stop treatment method for an in-vehicle electric wire of the present invention, the water stop treatment for the in-vehicle electric wire can be reliably performed by a simple operation without significantly increasing the volume of the electric wire terminal portion. In addition, it is possible to easily visually check whether or not the electric wire has been subjected to the water stop treatment.

  A preferred embodiment of the present invention will be described with reference to the drawings.

  In addition, although this embodiment demonstrates the method of carrying out a water stop process to the electric wire for earth | ground for connecting the circuit mounted in the vehicle to earth | ground, this invention is not limited to this, The various waterproofness in which high waterproofness is calculated | required It can also be applied to in-vehicle electric wires.

  The water stopping method for grounding wires according to this embodiment includes the following steps.

1) Terminal Crimping Step This step is a step of crimping and fixing the ground connection terminal 20 to one end of the grounding electric wire 10 as shown in FIGS.

  As the grounding wire 10, an insulated wire having a covering 14 around the conductor 12 is used. Then, the covering material 14 at one end is removed by a predetermined length to expose the conductor 12.

  A ground connection terminal 20 as shown in FIGS. 1A and 1B is fixed to the end of the ground wire 10 by pressure. The illustrated ground connection terminal 20 is formed of a single metal plate, and integrally includes a ground connection portion 21 connected to a vehicle body ground, a conductor barrel 22 and an insulation barrel 24. The ground connection portion 21 is provided with a bolt insertion hole 21a through which a not-illustrated bolt can be inserted, and the ground connection portion 21 is fastened to the vehicle body by the bolt to be electrically connected to the body. (Ie connected to the body ground).

  In a state where both the barrels 22 and 24 of the ground connection terminal 20 are opened, the end of the grounding wire 10 from which the covering material 14 has been removed as described above is set, and then the conductor barrel 22 and the insulation barrel 24. Are closed and fixed to the conductor 12 and the covering material 14 by crimping.

2) Water stop agent supply step and pressure reduction step This step is a water stop that is fluid and colored with respect to one end of the ground wire 10 (the end to which the ground connection terminal 20 is fixed). And the other terminal (the terminal opposite to the terminal to which the ground connection terminal 20 is fixed) so that the colored water-stopping agent penetrates into the inside of the covering material 14. ) To perform a decompression step of sucking and decompressing the air inside the covering material 14.

  First, in the water stopping agent supplying step, the colored water stopping agent 56 is dropped by the dispenser 50 shown in FIG. 4 at the position indicated by the arrow A in FIGS. . This dropping position can be appropriately set according to the terminal structure.

  The colored water-stopping agent 56 preferably has fluidity at least at the time of supply, is difficult to move from the filling position when the electric wire is used, and has flexibility enough to deform following the bending of the electric wire. . Specifically, it may be a liquid or gel that has a relatively high viscosity, and its properties may hardly change over time from the time of supply, may be cured after supply, and may be rich in elasticity after being cured.

  Specifically, when the initial viscosity is about 0.006 to 6 Pa · s, it is confirmed that the coating material 14 can be penetrated by reducing the pressure for about 5 to 120 seconds at a pressure of about 10 kPa to 100 kPa. As the material, silicone resin, silicone rubber, grease, and other adhesives having viscosity and elasticity are suitable. The silicone resin can be used regardless of whether it is a two-component type (a type in which curing starts by mixing two components) or a one-component type (a type that spontaneously cures with only one component).

  In order to color this, it is conceivable to use a dye or a pigment. However, in order to more reliably identify the colored water-stopping agent 56 by a laser sensor, which will be described later, a pigment that can lower the light transmittance. Is preferably used. However, when a pigment is used, it is preferable to use a pigment having a particle size as small as possible (average particle size of several μm or less) so that the concentration does not become excessively high so that precipitation thereof is difficult to occur. Various colors are conceivable, but it is preferable to use black so that light can be more reliably blocked. For example, the component of the pigment used for this purpose is carbon black.

  A dispenser 50 shown in FIG. 4 has a syringe 52 that contains a colored water-stopping agent 56 and a nozzle 54 that serves as an outlet of the syringe 52, and a controller (not shown) supplies air to supply the colored water-stopping agent 56. By controlling the amount while extruding, the fixed amount of the colored water-stopping agent 56 can be dropped intermittently.

  Depending on the type of the colored water-stopping agent 56 in the syringe 52, when the upper surface is in contact with air for a long period of time, it becomes easy to form a film, and the formation of such a film significantly affects the dropping performance of the dispenser 50. Therefore, when this type of colored water-stopping agent 56 is used, the upper surface thereof is preferably covered with the protective liquid 58 so that the colored water-stopping agent 56 is prevented from solidifying. As the protective liquid 58, for example, chemically stable liquid paraffin may be used.

  In addition, the protective liquid 58 may be one that is colored in a color different from the colored water-stopping agent 56 so that the liquid level of the colored water-stopping agent 56 can be easily identified. The color should just be not the same color as the coloring water-stopping agent 56, and can be set suitably.

  Further, when the dispenser 50 is not used for a long time while the colored water-stopper 56 is accommodated in the syringe 52, the color water-stopper 56 exposed from the tip of the nozzle 54 is solidified depending on the type of the color water-stopper 56. Therefore, as shown in FIG. 5A, solidification is preferably prevented by immersing the tip of the nozzle 54 in the protective liquid 58. When the dispenser 50 is used again, the protective liquid 58 adhering to the tip of the nozzle 54 may be wiped off. Specifically, as shown in FIG. 5B, the protective liquid 58 can be wiped by sandwiching the nozzle 54 using the chuck 59 and moving the dispenser 50.

  Here, when the colored water-stopping agent 56 is dropped using the dispenser 50, if the required amount of the color water-stopping agent 56 is supplied by one drop, the color water-stopping agent 56 may overflow from a predetermined dropping position. Therefore, it has been confirmed that when the dropping is performed in a plurality of times, sufficient colored water-stopping agent 56 penetrates into the inside of the covering material 14 and the water-stopping performance is further improved. Therefore, in this embodiment, the colored water stopping agent 56 is dropped in a plurality of times.

  The number of times of dropping and the time interval are appropriately set according to conditions such as the size of the cross section of the ground wire 10, the viscosity of the colored water-stopping agent 56, and the pressure during decompression. However, for the second and subsequent drops, the colored water-stopper before the colored water-stopper 56 dropped in the previous round completely penetrates into the inside of the covering material 14 (is lost from the wire terminal). It is preferable to drop 56 so that 56 is replenished to the electric wire terminal. If it does in that way, the colored water stop agent 56 dripped at all times will block the water channel in the coating | covering material 14 without a clearance gap, and can improve water stop performance more. However, the speed at which the dropped colored water-stopping agent 56 penetrates into the inside of the covering material 14 is the fastest in the first drop and becomes slower in the later round (the later round, the earlier the drop Since a large amount of the colored water-stopping agent 56 already exists inside the covering material 14, it becomes difficult to newly penetrate the inside of the covering material 14), and the dropping time interval is shortest between the first time and the second time, Thereafter, the interval gradually increases.

  Moreover, in this embodiment, as shown in FIG. 6, the dropping is performed while confirming whether the dropping is good or not by a transmission type laser sensor 60 which is a kind of optical sensor. It is surely done.

  The transmissive laser sensor 60 shown in FIG. 6 is configured such that the light receiving unit 64 receives the laser 66 projected from the light projecting unit 62. There is nothing that shields the laser 66, and the sensor output is ON while the light receiving unit 64 continues to receive the laser 66. Conversely, when the laser 66 is shielded and the amount of light received by the light receiving unit 64 decreases, the sensor output is reduced. Is turned off.

  The transmission type laser sensor 60 is arranged so that the laser 66 passes between the conductor 12 exposed in the vicinity of the end of the covering material 14 and the tip of the nozzle 54. If a colored water-stopping agent 56 having a low rate is present during this period, the laser 66 is shielded as a result, and as a result, the sensor output is turned off. Conversely, when the colored water-stopping agent 56 is not present, it is turned on. The passing position of the laser 66 may be set as appropriate according to the gap between the conductor 12 and the nozzle 54, but in the case of the embodiment described later, the gap between the conductor 12 and the nozzle 54 is about 5 mm. The passing position at this time may be set at a position about 3 mm away from the tip of the nozzle 54. (If it is further closer to the tip of the nozzle 54 than this, even when the colored water-stopping agent 56 is not dripped, there is a possibility that the colored water-stopping agent 56 slightly protruding from the tip of the nozzle 54 due to liquid dripping shields the laser 66 from light. .)

  According to this configuration, first, as shown in FIG. 6 (a), the laser 66 is shielded from light in the initial state (for example, the state in which the nozzle 54 is positioned) and before the colored water stopping agent 56 starts to be dropped. Sensor output is turned ON. Next, when the first dripping of the colored water stopping agent 56 is started in FIG. 6B, the colored water stopping agent 56 shields the laser 66, so that the sensor output is turned off. In this state, since the inside of the covering material 14 is depressurized by a decompression step described later, the dropped colored water-stopping agent 56 penetrates into the inside of the covering material 14 as shown in FIG. As a result, there is no light shielding the laser 66, and the sensor output is turned ON again. When the second dropping is started, this procedure is repeated as shown in FIGS. As described above, while the colored water stopping agent 56 is appropriately dripped, the transmission type laser sensor 60 sequentially outputs ON and OFF at a certain interval. Therefore, for example, when a problem occurs that the colored water-stopper 56 is solidified and cannot be dripped, the sensor continues to output ON and does not switch OFF even if a predetermined time elapses. By capturing it as a signal, it is possible to reliably detect a failure of the water stop treatment.

  As described above, in the water-stopping agent supply step, the colored water-stopping agent 56 is dropped onto one terminal of the grounding electric wire 10 (the terminal to which the ground connection terminal 20 is fixed) by the dispenser 50, and the dropping The dropping is performed while confirming the quality by the transmission type laser sensor 60.

  And at the same time as starting this waterproofing agent supply process, the decompression process which attracts | sucks the air inside the coating | covering material 14 from the other terminal (terminal on the opposite side to the terminal which fixed the ground connection terminal 20) of the electric wire 10 for ground is started. To do. As described above, since the colored water-stopping agent 56 is dropped in a plurality of times in the water-stopping agent supplying step, this pressure-reducing step is continued until all dripping is completed. In addition, these series of steps may be performed individually for each grounding wire 10, but in this embodiment, a plurality of grounding wires 10 are simultaneously used in order to improve the efficiency of water stopping treatment. To do. Specifically, the water-stopping agent supplying step is performed by simultaneously dropping the colored water-stopping agent 56 on one end of the plurality of grounding wires 10 and, as shown in FIG. The other end of the electric wire 10 is connected to the common electric wire connecting device 30, and this electric wire connecting device 30 is connected to the suction port of the suction pump 44 via the pressure control panel 42, thereby Perform water stop treatment at the same time.

  The illustrated wire connection device 30 includes a housing 32 whose inside is sealed, and a sealed space in the housing 32 is connected to a suction port of the suction pump 44 via an appropriate pipe 40 and the pressure control panel 42. Yes.

  A rubber stopper holding plate 34 is provided on the front wall of the housing 32. The rubber stopper holding plate 34 holds a plurality of rubber stoppers 36 as shown in FIG. Each rubber plug 36 is connected to the terminal of each grounding wire 10.

  Specifically, the rubber plug holding plate 34 is provided with a plurality of rubber plug mounting holes 34a penetrating in the thickness direction, and the rubber plugs 36 are respectively fitted in the rubber plug mounting holes 34a. Yes.

  Each rubber plug 36 is formed in a cylindrical shape having a through hole 36a on its central axis, and a sealing protrusion 36b is formed on the inner peripheral surface of the through hole 36a. The sealing protrusion 36b plays a role of maintaining a sealed state in the housing 32 by being pressed against the surface of the covering material 14 of the grounding wire 10 inserted into the through hole 36a. Similarly, a sealing protrusion 36c is formed on the outer peripheral surface of the rubber plug 36, and the sealing protrusion 36c is pressed against the inner peripheral surface of the rubber plug mounting hole 34a to provide a seal.

  A rubber plug cover 38 that covers the outer peripheral portion of the rubber plug 36 from the outside is provided at the outer end of each rubber plug mounting hole 34 a. The rubber plug cover 38 is grounded in the through hole 36 a of the rubber plug 36. A taper-shaped through hole 38a for guiding the end of the electric wire 10 is provided at the center.

  In this wire connection device 30, the terminal of each grounding wire 10 (the terminal opposite to the terminal to which the ground connection terminal 20 is fixed) is inserted into the through hole 36 a of the rubber plug 36 at the back through the through hole 38 a of each rubber plug cover 38. ) Can be connected to a common sealed space in the housing 32. Then, the inside space of the covering material 14 in each grounding wire 10 is also simultaneously reduced by reducing the pressure in the sealed space under the control of the pressure control panel 42 until the suction pump 44 operates to a certain negative pressure. The pressure can be reduced.

  In the present embodiment, the decompression step as described above is completed at the same time as the final dripping of the colored water-stopping agent 56 or is completed in a very short time from the last dripping. In this way, a part of the colored water-stopping agent 56 is exposed at the end of the electric wire, that is, the conductor 12 (exposed between the conductor barrel 22 and the insulation barrel 24 of the ground connection terminal 20). 1 (a) and 1 (b), the portion of the conductor 12 indicated by the arrow A is covered with the colored water-stopping agent 56, and the water-stopping treatment is completed, and the water is stopped from the wire terminal to the inside of the covering material 14 without any gap. be able to.

  As described above, the colored water-stopping agent 56 is dropped on the portion near the end of the covering material 14 in the water-stopping agent supply step, and the air inside the covering material 14 is reduced in the pressure-reducing step. Even if the viscosity of 56 is somewhat high, this will surely permeate the inside of the covering material 14 and build a water stop structure that blocks the water passage in the covering material 14. That is, unlike the conventional method in which the periphery of the wire terminal is resin-molded, it is possible to reliably perform the water stop treatment of the grounding wire by a simple operation without significantly increasing the volume of the terminal portion. . Furthermore, since the water-stopping agent is colored and a part of the water-stopping agent is exposed at one end of the grounding wire, its presence can be seen from the outside after the water-stopping treatment, and the water-stopping treatment has been performed. It is possible to easily identify whether it is an electric wire.

  In the above method, the water-stop agent supplying step and the pressure-reducing step are performed simultaneously. However, in the present invention, after the water-stop agent supplying step, the pressure-reducing step is started before the colored water-stopper 56 is cured. However, the supplied colored water-stopping agent 56 can be sucked and penetrated into the covering material 14.

  Further, the water-stopping agent supply step can be performed before the terminal fixing step. However, in that case, the water-stopping structure by the supplied colored water-stopping agent 56 may be deformed or cracked due to external force due to the terminal crimping or the like. If the liquid medicine supply step is performed, a more reliable water stop treatment can be realized.

  Furthermore, the terminal to be fixed in the terminal fixing step does not necessarily have to be the ground connection terminal 20, and a terminal fixed to the terminal on the opposite side (for example, a terminal connected to the vehicle load side) is fixed. May be. Also in this case, it is possible to construct a good water stop structure at a position on the near side of the terminal. However, in this case, there is a possibility that moisture may enter the coating material 14 in the region from the ground connection portion to the water stop structure of the terminal on the opposite side, whereas the ground connection is performed as described above. If the colored water-stopping agent 56 is supplied to the terminal on the side where the terminal 20 is fixed (that is, the inlet side of moisture entering from the ground connection portion), the advantage that moisture can be prevented from entering inside the covering material 14 almost certainly. Is obtained.

  In this embodiment, the transmission type laser sensor 60 is used as an optical sensor. However, the present invention is not limited to this as long as the presence of the colored water-stopping agent 56 can be detected. For example, a reflection type laser sensor may be used. Alternatively, an infrared sensor may be used.

  The water stop treatment was performed under the following conditions by the method shown in FIGS.

Colored water-stopping agent: Silicone rubber mixed with carbon black (viscosity 0.6 Pa · s)
Protective liquid ... Liquid paraffin Wire cross-sectional area ... 0.5mm ²
Number of drops ... 4 drops Amount of colored water-stopping agent per drop ... 4.5 to 5.5 mg
Pressure during decompression ... 50 to 70kPa
Depressurization time: 25 seconds from the first drop (finished simultaneously with the fourth drop)

Colored water-stopping agent: Silicone rubber mixed with carbon black (viscosity 0.6 Pa · s)
Protective liquid ... Liquid paraffin Wire cross-sectional area ... 1.25mm ²
Number of drops: 5 drops Colored water-stopping agent drop amount per drop ... 4.5 to 5.5 mg
Pressure during decompression ... 50 to 70kPa
Depressurization time: 25 seconds after the first drop (finished simultaneously with the fifth drop)

  As a result of the water-stopping treatment according to Examples 1 and 2 described above, a sufficient amount of the color water-stopping agent 56 to exhibit water-stopping performance is obtained in a state where a part of the color water-stopping agent 56 is exposed at the electric wire terminal. It was confirmed that it penetrated the inside of the covering material 14.

(A) is a top view which shows the structure which crimped-fixed the ground connection terminal to one terminal of the electric wire for earth | ground concerning embodiment of this invention, (b) is the front view. It is a figure which shows the example of the apparatus for decompressing the inside of the coating | covering material in the said electric wire for earth | grounds. It is sectional drawing which shows the electric wire connection part of the electric wire connection apparatus shown by FIG. It is sectional drawing which shows the structure of the dispenser for supplying a colored water stop agent to the terminal of the said electric wire for earth | ground. (A) is sectional drawing which shows the state which immersed the nozzle front-end | tip of the said dispenser in protective liquid, (b) is sectional drawing which shows the place which wipes off the said protective liquid using a chuck | zipper. (A)-(e) is process drawing which shows the place which supplies the colored water stop agent to the terminal of the said electric wire for earth | ground using the said dispenser and a transmissive | pervious laser sensor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Electric wire for earth 12 Conductor 14 Coating | covering material 50 Dispenser 52 Syringe 54 Nozzle 56 Colored water stopping agent 58 Protection liquid

Claims (7)

It is a method of water-stopping an in-vehicle electric wire mounted on a vehicle, which is an electric wire having a coating material on the outside of the conductor,
A water-stopping agent supplying step of supplying fluidized and colored water-stopping agent to one terminal of the in-vehicle electric wire;
The in-vehicle state during or after the supply of the colored water-stopping agent so that the other part penetrates into the inside of the covering material in a state where a part of the color water-stopping agent is exposed to one terminal of the vehicle-mounted electric wire. And a decompression step of sucking and decompressing the air inside the covering material from the other end of the electrical wire. In the water stop processing method of the electric cable for vehicles according to claim 1,
The on-vehicle electric wire is a grounding electric wire for connecting a circuit mounted on a vehicle to an earth, and is a water stop treatment method for an on-vehicle electric wire. In the water stop processing method of the vehicle-mounted electric wire according to claim 1 or 2,
The water-stop agent supplying step is a step of dripping the colored water-stop agent onto one end of the in-vehicle electric wire, and performing the dripping while confirming whether or not the dripping is good by an optical sensor. A water stop treatment method for an in-vehicle electric wire. In the water stop processing method of the electric cable for vehicles according to any one of claims 1 to 3,
The water-stop agent supplying step is a step of dripping the color water-stop agent onto one terminal of the in-vehicle electric wire using a dispenser having a syringe containing the colored water-stop agent and a nozzle serving as an outlet thereof. There,
A water-stop treatment method for an in-vehicle electric wire, wherein the upper surface of the colored water-stop agent in the syringe is covered with a protective liquid for preventing the water-stop agent from solidifying. In the water stop processing method of the electric cable for vehicles according to claim 4,
What is colored in a color different from the colored water-stopping agent is used as the protective liquid. In the water stop processing method of the electric cable for vehicles according to any one of claims 1 to 5,
A water stop treatment method for an in-vehicle electric wire, wherein a black water stop agent is used as the colored water stop agent. In an in-vehicle electric wire that has a coating material on the outside of a conductor and is mounted on a vehicle,
An in-vehicle electric wire, characterized in that a colored water-stopping agent is filled inside the coating material by the water-stop treatment method according to any one of claims 1 to 6.

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