JP2017091642A - Electric wire module manufacturing method and electric wire module - Google Patents

Abstract

An object of the present invention is to more easily check the water-stopping property of a heat-shrinkable tube. A method of manufacturing an electric wire module includes a heat-shrinkable tube before shrinking around the core wire connecting portion while arranging the thermoplastic first color adhesive around the core wire connecting portion of the electric wire with terminal 7. The heat-shrinkable tube disposing step covered with 2 and the coloring member 5 of the second color different from the first color is disposed at a position facing the tip surface 910 of the core wire 91 connected to the core wire connecting portion 82 of the terminal 8. And a heating step of heating and shrinking the heat-shrinkable tube 2 before shrinkage in a state where the heat-shrinkable tube 2 before shrinkage covers the periphery of the core wire connecting portion 82. [Selection] Figure 6

Description

  The present invention relates to an electric wire module in which a connection portion between a terminal and a core wire is water-stopped with a heat-shrinkable tube and an adhesive, and a manufacturing method thereof.

  For example, as shown in Patent Document 1, a heat-shrinkable tube before contraction covering the periphery is heated in a state where an adhesive is disposed at a connection portion between a terminal of a terminal-attached electric wire and a core wire of an insulated wire. As a result, the heat-shrinkable tube contracts, and the connection portion between the terminal and the core wire is stopped.

JP 2012-094340 A

  By the way, the place where water is stopped by the heat-shrinkable tube after shrinkage is immersed in liquid, air is sent from between the core wire on the opposite end and the insulation coating, and the water-stopping property of the heat-shrinkable tube can be confirmed. is there. However, in this case, a device for feeding air or the like is required, and much time is required for confirming the water stoppage.

  An object of this invention is to provide the technique which can confirm the water stop of a heat contraction tube more easily.

  The electric wire module manufacturing method which concerns on a 1st aspect is an insulated wire provided with a core wire and the insulation coating | cover which covers the circumference | surroundings of the said core wire, the other party connection part which is provided in one end side and can be connected to the other party member, and the said other party connection part And a terminal including a core wire connection portion connected to the core wire exposed at an end portion of the insulated wire provided on the other end side of the first wire with a thermoplastic material around the core wire connection portion of the electric wire with terminal. A heat-shrinkable tube disposing step of covering the periphery of the core wire connecting portion with a heat-shrinkable tube before shrinkage while disposing a color adhesive, and facing the front end surface of the core wire connected to the core wire connecting portion of the terminal A coloring member disposing step of disposing a coloring member of a second color of a color different from the first color at a position where the heat shrinking tube before contraction covers the periphery of the core wire connecting portion. A heating step of heating and shrinking the heat shrinkable tube; Equipped with a.

  The electric wire module manufacturing method according to the second aspect is an aspect of the electric wire module manufacturing method according to the first aspect. In the electric wire module manufacturing method according to the second aspect, in the colored member disposing step, the colored member is disposed at a position in contact with the leading end surface of the core wire and the main surface on the core wire side of the terminal. .

  The electric wire module which concerns on a 3rd aspect is an insulated wire provided with a core wire and the insulation coating which covers the circumference | surroundings of the said core wire, the other party connection part which can be connected to the other party member provided in one end side, and the said other party connection part A terminal provided with a core wire connecting portion provided on the other end side and connected to the core wire exposed at the end of the insulated wire; and a heat-shrinkable tube and an inner peripheral surface of the heat-shrinkable tube. A thermoplastic adhesive formed, and a water stop tube that tightly contacts the core wire connection portion of the terminal and covers the periphery of the core wire connection portion in a contracted state, and includes the adhesive, Of the heat-shrinkable tube, the portion solidified in a state of overflowing from one end of the terminal on the counterpart connection portion side is a portion around the core wire connection portion in the heat-shrinkable tube after shrinking in the adhesive. It is colored with different colors.

  In the first aspect and the second aspect, a coloring member disposing step of disposing a coloring member of a second color different from the first color at a position facing the front end surface of the core wire connected to the core wire connecting portion of the terminal. Is done. In this case, the melted and fluidized adhesive passes through the end surface of the core wire, and further flows out toward the one end of the heat shrinkable tube, thereby contacting the colored member. And the water stop can be easily confirmed as follows. That is, if the color of the adhesive overflowing from the end of the heat shrinkable tube is the second color, the adhesive has reached the end surface of the core wire, that is, the adhesive has sufficiently covered the core wire and stopped. You can see that it is watered. On the other hand, if the color of the adhesive overflowing from the end of the heat-shrinkable tube is the first color, the adhesive has not reached the end surface of the core wire, that is, the adhesive has sufficiently covered the core wire. It can be seen that the waterstop is insufficient. In this case, a device for feeding air or the like is not necessary, and the water stoppage can be immediately confirmed visually.

  Further, in the second aspect, in the coloring member disposing step, the coloring member is disposed at a position in contact with the main surface on the core wire side of the tip surface of the core wire and the terminal. The position where the coloring member is disposed is the place where the adhesive that has been melted and fluidized is most difficult to reach. For this reason, if the color of the adhesive overflowing from the end of the heat-shrinkable tube is the second color, it can be determined that the adhesive has reached the location where the adhesive in the fluid state is most difficult to reach. . In this case, the accuracy of the water-stop confirmation is further improved.

  Further, in the third aspect, of the adhesive, the portion of the heat shrinkable tube that has solidified in a state of overflowing from one end of the terminal on the mating side of the terminal is in the heat shrinkable tube after shrinkage of the adhesive. It is colored with a different color from the part around the core wire connection part. In this case, for example, the water stoppage can be easily confirmed using a colored member.

It is explanatory drawing explaining a part of electric wire module manufacturing method which concerns on embodiment. It is explanatory drawing explaining a part of electric wire module manufacturing method which concerns on embodiment. It is explanatory drawing explaining a part of electric wire module manufacturing method which concerns on embodiment. It is explanatory drawing explaining a part of electric wire module manufacturing method which concerns on embodiment. It is explanatory drawing explaining a part of electric wire module manufacturing method which concerns on embodiment. It is explanatory drawing explaining a part of electric wire module manufacturing method which concerns on embodiment. It is sectional drawing of the electric wire module obtained by the electric wire module manufacturing method which concerns on embodiment.

  Hereinafter, embodiments will be described with reference to the accompanying drawings. The following embodiment is an example embodying the present invention, and is not an example of limiting the technical scope of the present invention.

<Embodiment>
First, the electric wire module 100 obtained by the electric wire module manufacturing method of this embodiment is demonstrated, referring FIG. FIG. 7 is a side sectional view of the electric wire module 100. Here, the electric wire module 100 includes the terminal-attached electric wire 7 and the contracted water stop tube 1. The terminal-attached electric wire 7 includes an insulated electric wire 9 and a terminal 8. The water stop tube 1 includes a heat shrinkable tube 2 and an adhesive 3 provided on the inner peripheral surface of the heat shrinkable tube 2.

  Here, the insulated wire 9 includes a core wire 91 and an insulating coating 92 that covers the periphery of the core wire 91. The core wire 91 is a conductor whose main component is a metal such as aluminum or copper, for example. The insulating coating 92 is a resin insulating member. The insulating coating 92 is a member of synthetic resin whose main component is, for example, polyethylene or vinyl chloride.

  In the terminal-attached electric wire 7, the insulating coating 92 around the core wire 91 at the end of the insulated electric wire 9 is removed. A terminal 8 is connected to the core wire 91 at the end of the insulated wire 9.

  The terminal 8 is a member mainly composed of a metal such as copper. The terminal 8 is provided on the one end 88 side of the terminal 8 and can be connected to the mating member 61, and the exposed end of the insulated wire 9 is provided on the other end 89 side of the counterpart connecting portion 81. A core connection portion 82 connected to the core wire 91, a cover connection portion 83 connected to the insulation coating 92, and an intermediate portion 84 that is a portion connecting the counterpart connection portion 81 and the core wire connection portion 82.

  The counterpart connection portion 81 of the terminal 8 is a portion that can be connected to the counterpart member 61 that is a connection counterpart of the terminal 8, and includes a bolt hole 810 that enables bolt fastening to the counterpart member 61. . In addition, as the other party member 61, a battery or a metal body (terminal block) etc. can be considered, for example. In FIG. 7, the counterpart member 61 is indicated by a virtual line (two-dot chain line). In FIG. 7, the bolt 62 and the nut 63 that fix the mating member 61 and the mating connection portion 81 are also indicated by phantom lines (two-dot chain lines).

  In the present embodiment, when the mating connection portion 81 is fixed to the mating member 61 by the bolt 62 and the nut 63, the mating member 61 is in contact with the nut 63 on one surface side and the mating member 61 on the other surface side. And a portion in contact with.

  The core wire connecting portion 82 of the terminal 8 is a portion connected to the core wire 91 at the end of the insulated wire 9. Here, the core wire connecting portion 82 includes a crimping piece that can be crimped to the core wire 91 at the end of the insulated wire 9. In the terminal-attached electric wire 7, the crimping piece of the core wire connecting portion 82 is caulked in a state of covering the periphery of the core wire 91 at the end of the insulated wire 9. As another example, it is of course conceivable that the core wire connecting portion is welded to the core wire 91 at the end of the insulated wire 9 by ultrasonic welding or the like. In this case, it is conceivable that the core wire connecting portion is formed in a flat plate shape capable of welding the core wire 91 at the end of the insulated wire 9.

  Further, the covering connection portion 83 of the terminal 8 is provided on the other end 89 side of the terminal 8 with respect to the core wire connection portion 82. The covering connection portion 83 is a portion connected to the insulating coating 92 of the insulated wire 9, and here includes a crimping piece that can be crimped to the insulating coating 92. In the terminal-attached electric wire 7, the crimping piece of the covering connection portion 83 is caulked in a state of covering the periphery of the insulating coating 92.

  The intermediate portion 84 is a portion that connects the counterpart connection portion 81 and the core wire connection portion 82, and is formed in a flat plate shape here. For example, in the terminal 8 in the terminal-attached electric wire 7, a portion from the tip of the core wire 91 of the insulated wire 9 to the counterpart connection portion 81 is the intermediate portion 84.

  The water stop tube 1 includes a heat shrink tube 2 and an adhesive 3. The heat-shrinkable tube 2 is a heat-shrinkable tube that shrinks when receiving heat. The heat shrinkable tube 2 is a tubular member formed of a synthetic resin such as a polyolefin resin or a nylon resin, for example. The heat-shrinkable tube 2 is obtained by cooling a resin member that has been formed into a very thin tube by extrusion molding, after being stretched into a thick tube in a heated state. The heat-shrinkable tube 2 thus obtained has a shape memory characteristic that, when heated, contracts to a thin tubular shape before being stretched. A thermoplastic adhesive 3 is provided on the inner peripheral surface of the heat shrinkable tube 2. As the adhesive 3, for example, a modified olefin-based or polyester-based hot-melt adhesive can be considered.

  In the electric wire module 100, the water-stopping tube 1 after shrinking around the core wire connecting portion 82 of the terminal 8 with the one end 21 of the heat shrinkable tube 2 disposed on the counterpart connecting portion 81 side of the terminal 8. Covering. More specifically, in the state where the gap inside the water-stop tube 1 after shrinkage is filled with the adhesive 3 that has been melted and then solidified, the water-stop tube 1 after shrinkage is connected to the core wire connection portion 82 of the terminal 8. The connection part with the core wire 91 of the insulated wire 9 is covered. Thereby, the connection part of the terminal 8 and the core wire 91 is water-stopped by the water-stop tube 1 after contraction.

  Here, the adhesive 3 in the electric wire module 100 shows a first color in a state before the water stop tube 1 contracts. However, in the electric wire module 100, the part solidified in the state overflowing from the one end 21 side of the heat shrinkable tube 2 in the adhesive 3 shows a second color different from the first color. It is because the electric wire module 100 is obtained by the electric wire module manufacturing method mentioned later. Details will be described later.

  Next, the electric wire module manufacturing method of this embodiment is demonstrated, referring FIGS. 1 and 2 are explanatory views for explaining a colored member disposing step in the electric wire module manufacturing method. Drawing 3 is an explanatory view explaining the heat contraction tube arrangement process in an electric wire module manufacturing method. 4-6 is explanatory drawing explaining the heating process in an electric wire module manufacturing method. In addition, FIG. 5 is a partially enlarged view in which a portion where the coloring member 5 is disposed in the heating step in the electric wire module manufacturing method is enlarged.

  First, the details of the adhesive 3 and the colored member 5 in the electric wire module manufacturing method will be described. Here, in the water stop tube 1 before contraction as described above, the adhesive 3 shows the first color. When the adhesive 3 is not colored by the coloring member 5, the adhesive 3 exhibits the first color even after the water stop tube 1 is contracted. For example, the first color indicated by the adhesive 3 is transparent and colorless.

  The colored member 5 is a member that causes the portion in contact with the colored member 5 of the adhesive 3 that has been heated and fluidized to exhibit the second color. Here, the coloring member 5 is a member that colors the second color to the colorless and transparent adhesive 3. For example, the coloring member 5 is a liquid or solid member containing a PE-based pigment. The second color is a color different from the first color. Here, since the first color is colorless and transparent, the second color may be any color such as green or blue.

  In this embodiment, the case where the colorless and transparent (first color) adhesive 3 is colored to the second color by the coloring member 5 is shown, but another example is also conceivable. For example, a case where a color developing component is contained in the adhesive and the color developing component and the colored member come into contact with each other and react to cause the adhesive to change from the first color to the second color is considered.

  In the electric wire module manufacturing method, the coloring member disposing step is a step of disposing the second color coloring member 5 at a position facing the front end surface 910 of the core wire 91 connected to the core wire connecting portion 82 of the terminal 8. . Here, the coloring member disposing step is performed before the heat shrinkable tube disposing step.

  In the present embodiment, in the coloring member disposing step, the coloring member 5 is disposed at a position in contact with the front end surface 910 of the core wire 91 as shown in FIG. That is, here, the coloring member 5 is disposed at a position facing the front end surface 910 of the core wire 91 without a gap. As another example, it is also conceivable that the coloring member 5 is disposed on the front end surface 910 of the core wire 91 with a slight space therebetween.

  Furthermore, in the present embodiment, in the colored member disposing step, the colored member is in contact with the main surface on the core wire 91 side (hereinafter, one main surface 80) of the tip surface 910 and the terminal 8 of the core wire 91. Is provided. Here, the coloring member 5 is disposed so as to come into contact with the leading end surface 910 of the core wire 91 and the one main surface 80 at the intermediate portion 84 of the terminal 8. For example, when the colored member 5 is in a liquid state, the liquid colored member 5 is applied to the portion of the tip surface 910 of the core wire 91 closest to the one main surface 80 side in the colored member disposing step. When the coloring member 5 is solid, the coloring member 5 is placed on the one main surface 80 of the terminal 8 in contact with the front end surface 910 of the core wire 91 in the coloring member disposing step.

  Here, as shown in FIG. 2, the coloring member 5 is disposed over the entire front end surface 910 of the core wire 91 in the width direction of the terminal 8. In this case, it is conceivable that the adhesive 3 that comes into contact with the coloring member 5 and then overflows from the one end 21 of the heat-shrinkable tube 2 is entirely colored in the second color in the width direction of the terminal 8. For this reason, it can confirm easily visually that the adhesive agent 3 shows a 2nd color. As another example, the coloring member 5 may be disposed on a part of the front end surface 910 of the core wire 91 in the width direction of the terminal 8. For example, a case where the coloring member is disposed only in the central portion of the front end surface 910 of the core wire 91 in the width direction of the terminal 8 can be considered.

  And in this embodiment, a heat contraction tube arrangement | positioning process is performed after a coloring member arrangement | positioning process. In the heat shrinkable tube disposing step, the adhesive 3 is disposed on the core wire connecting portion 82 of the terminal 8 connected to the core wire 91 of the insulated wire 9, and the periphery of the core wire connecting portion 82 is covered with the heat shrinkable tube 2 before shrinkage. It is a process. As shown in FIG. 3, here, in the heat shrinkable tube disposing step, the adhesive 3 is provided on the inner peripheral surface around the core wire connection portion 82 of the terminal 8 connected to the core wire 91 of the insulated wire 9. The water-stop tube 1 including the heat-shrinkable tube 2 is disposed so as to cover it.

  Next, the heating process will be described. The heating step is a step of heating and shrinking the heat-shrinkable tube 2 before shrinkage in a state where the heat-shrinkable tube 2 before shrinkage covers the periphery of the core wire connecting portion 82. Here, the heating step is performed after the heat-shrinkable tube disposing step. As shown in FIGS. 4 and 6, here, in the heating process, the water stop tube 1 before contraction covering the periphery of the core wire connection portion 82 of the terminal 8 is heated by the heating unit 4 such as a heater. Thereby, the heat shrinkable tube 2 contracts while the adhesive 3 of the water stop tube 1 melts.

  Eventually, as shown in FIG. 6, the heat-shrinkable tube 2 is completely contracted. When the heat-shrinkable tube 2 is completely shrunk, the melted and fluid adhesive 3 fills the gap inside the heat-shrinkable tube 2 after shrinkage, and a part of the adhesive 3 is part of the heat-shrinkable tube 2. It overflows from one end 21 and the other end 29. And since this adhesive agent 3 solidifies, the connection part of the terminal 8 and the core wire 91 is water-stopped by the water-stop tube 1 after shrinkage | contraction.

  By the way, in order to ensure the water-stopping property of the connection portion between the terminal 8 and the core wire 91 by the water-stop tube 1, the heated and melted adhesive 3 is solidified in a state where the tip surface 910 of the core wire 91 is sufficiently covered. It is preferable to do.

  Focusing on the inside of the heat shrinkable tube 2 during shrinkage, as shown in FIG. 5, the adhesive 3 provided on the inner peripheral surface of the heat shrinkable tube 2 melts inside the heat shrinkable tube 2 in the shrinking process. While flowing around the core wire connection portion 82, a part flows toward the one end 21 side of the heat shrinkable tube 2. At this time, the fluid adhesive 3 reaches the tip surface 910 of the core wire 91 and passes through a path (hereinafter referred to as an ideal path) that sufficiently covers the tip surface 910, one of the heat shrinkable tubes 2. When flowing to the end 21 side, it is difficult to form a gap through which the liquid can reach the core wire connecting portion 82. That is, it can be said that the water stop tube 1 sufficiently secures water stoppage at the connection portion between the terminal 8 and the core wire 91.

  However, depending on the viscosity of the fluid adhesive 3 or the heating temperature, the fluid adhesive 3 may flow to the one end 21 side of the heat shrinkable tube 2 without passing through the ideal path. In this case, it cannot be said that the water stop tube 1 sufficiently secures the water stoppage of the connecting portion between the terminal 8 and the core wire 91.

  Therefore, if it is known whether or not the fluid adhesive 3 is passing through the ideal path, it can be determined whether or not the water stopping property of the electric wire module 100 is sufficiently secured.

  For this reason, in this embodiment, the coloring member arrangement | positioning process which arrange | positions the coloring member 5 is performed before the heating process. The coloring member 5 is disposed at a position facing the front end surface 910 of the core 91 and on the ideal path. Here, the coloring member 5 is disposed at a position closest to the one main surface 80 of the terminal 8 in the front end surface 910 of the core wire 91. The position of the tip end surface 910 of the core wire 91 that is closest to the one main surface 80 of the terminal 8 is the position where the fluid adhesive 3 is most difficult to reach. When the fluid adhesive 3 passes through a position closest to the one main surface 80 of the terminal 8 among the tip surfaces 910 of the core wire 91, the tip surface 910 of the core wire 91 is more reliably covered with the fluid adhesive 3. It can be said that

  In this embodiment, when the adhesive 3 heated and melted passes through the ideal path, it contacts the colored member 5 provided on the path. Here, the adhesive 3 originally exhibits the first color. However, as shown in FIG. 5, the portion of the fluid adhesive 3 after passing through the coloring member 5 exhibits the second color. And the part which shows a 2nd color among this fluid adhesives 3 flows toward the one end 21 side of the heat contraction tube 2, and overflows from the one end 21 of the heat contraction tube 2 soon. That is, after the heating process is completed, when the adhesive 3 overflowing from the one end 21 of the heat-shrinkable tube 2 shows the second color, the fluid adhesive 3 has passed through the ideal path, and is stopped. It can be determined that the connection portion between the terminal 8 and the core wire 91 is sufficiently stopped by the water tube 1.

  On the other hand, when the heated and melted adhesive 3 does not pass through the ideal path, the adhesive 3 that does not contact the coloring member 5 and overflows from the one end 21 of the heat shrinkable tube 2 has the first color. Show. In this case, it can be determined that the water stop tube 1 does not sufficiently stop the connection between the terminal 8 and the core 91.

  Here, in the present embodiment, the coloring member 5 is disposed on the one main surface 80 side of the terminal 8. This is for the following reason. When the connection portion between the terminal 8 and the core wire 91 is stopped using the heat-shrinkable tube 2 and the adhesive 3, a gap is easily formed at the central portion in the width direction of the terminal 8. In particular, as in the present embodiment, when the intermediate portion 84 of the terminal 8 is flat when viewed in cross section, a gap is likely to be formed at the central portion in the width direction of the terminal 8. This is because the cross-sectional shape of the intermediate portion 84 of the terminal 8 is flat while the cross-sectional shape of the heat-shrinkable tube 2 is circular. To explain this phenomenon more specifically, first, the adhesive 3 provided on the inner peripheral surface of the heat-shrinkable tube 2 is likely to come into contact with both side surfaces of the flat intermediate portion 84 relatively soon after the start of shrinkage. . For this reason, both side surfaces of the intermediate portion 84 are sufficiently bonded to the inner peripheral surface of the heat-shrinkable tube 2 by the adhesive 3, and a gap is not easily formed. On the other hand, the adhesive 3 does not contact the central portion of the intermediate portion 84 in the width direction of the terminal 8 unless the heat-shrinkable tube 2 contracts to some extent. In addition, since the inner peripheral surface of the heat shrinkable tube 2 comes into contact with both side surfaces of the intermediate portion 84 first, the portion of the heat shrinkable tube 2 that is scheduled to contact the central portion in the width direction of the terminal 8 is likely to rise. Furthermore, since the core wire 91 and the core wire connecting portion 82 exist on the one main surface 80 side of the terminal 8, a portion of the heat shrinkable tube 2 that is scheduled to contact the one main surface 80 side of the central portion in the width direction of the terminal 8. Is particularly prone to excitement. For this reason, in the center part in the width direction of the intermediate part 84 of the terminal 8 on the one main surface 80 side, it is difficult to be sufficiently bonded to the inner peripheral surface of the heat-shrinkable tube 2 by the adhesive 3, and a gap is easily formed. For this reason, in this embodiment, the coloring member arrangement | positioning process which arrange | positions the coloring member 5 in the position facing the front end surface 910 of the core wire 91 is performed. In this case, it can be visually confirmed whether or not the adhesive 3 is sufficiently spread over the portion where the gap is relatively easily formed. Here, the water-stopping determination can be made more reliable by disposing the coloring member 5 at a position where the fluid adhesive 3 is most difficult to reach.

  As described above, in the electric wire module manufacturing method of the present embodiment, by confirming the color of the adhesive 3 overflowing from the one end 21 of the heat shrinkable tube 2, the terminal 8 and the core 91 are connected by the water stop tube 1. It is possible to easily determine whether or not the connection portion is stopped.

  Moreover, in the electric wire module 100 obtained by the electric wire module manufacturing method of this embodiment, as FIG. 7 shows, the part solidified in the state which overflowed from the one end 21 side of the heat shrinkable tube 2 among the adhesive agents 3 is. Indicates the second color.

  However, the portion of the adhesive 3 that has solidified in the state of overflowing from the other end 29 of the heat-shrinkable tube 2 exhibits the first color. This is because the coloring member 5 is not disposed on the other end 29 side of the heat shrinkable tube 2. Since the other end 29 of the heat-shrinkable tube 2 covers the periphery of the insulated wire 9 that is relatively circular, this portion is easily adhered to the outer peripheral surface of the insulated wire 9 by the adhesive 3. That is, it is because the adhesive 3 easily spreads over the entire outer peripheral surface of the insulated wire 9, and it is difficult to generate a gap that can serve as a liquid intrusion path.

  More specifically, inside the heat-shrinkable tube 2 of the electric wire module 100, a portion of the adhesive 3 existing on the one end 21 side of the heat-shrinkable tube 2 from the tip surface 910 of the core wire 91 has the second color. The part which exists in the other end 29 side of the heat contraction tube 2 from the front end surface 910 of the core wire 91 shows a 1st color. Therefore, for example, a portion of the adhesive 3 that covers the periphery of the core wire connecting portion 82 exhibits the first color. That is, in the electric wire module 100, the part solidified in the state which overflowed from the one end 21 by the side of the other party connection part 81 of the terminal 8 among the heat shrinkable tubes 2 among the adhesive agents 3 shows a 2nd color, The part around the core wire connection part 82 in the heat-shrinkable tube 2 after shrinkage in the adhesive 3 shows the first color. In other words, in the electric wire module 100, a portion of the adhesive 3 that is solidified in the state of overflowing from the one end 21 on the counterpart connection part 81 side of the terminal 8 in the heat shrinkable tube 2 is the adhesive 3. Of these, the heat-shrinkable tube 2 after being contracted is colored in a color different from that around the core wire connecting portion 82.

<Effect>
In the present embodiment, the coloring member arrangement in which the coloring member 5 of the second color different from the first color is arranged at a position facing the front end surface 910 of the core wire 91 connected to the core wire connecting portion 82 of the terminal 8. A process is performed. In this case, the melted and fluidized adhesive 3 passes through the distal end surface 910 of the core wire 91 and further flows out toward the one end 21 of the heat shrinkable tube 2 to be in contact with the coloring member 5. And the water stop can be easily confirmed as follows. That is, if the color of the adhesive 3 overflowing from the one end 21 of the heat-shrinkable tube 2 is the second color, it means that the adhesive 3 has reached the front end surface 910 of the core wire 91, that is, the adhesive 3 It can be seen that the tip end surface 910 of the core wire 91 is sufficiently covered and water is stopped. On the other hand, if the color of the adhesive 3 overflowing from the one end 21 of the heat-shrinkable tube 2 is the first color, the adhesive 3 has not reached the front end surface 910 of the core wire 91, that is, the adhesive 3 It can be seen that the tip end surface 910 of the core wire 91 is not sufficiently covered, and the water stoppage is insufficient. In this case, a device for feeding air or the like is not necessary, and the water stoppage can be immediately confirmed visually. Moreover, it can suppress that an adhesive peels off with the momentum when air is sent.

  Further, in the present embodiment, in the coloring member disposing step, the coloring member 5 is disposed at a position in contact with the one main surface 80 on the core wire 91 side of the tip surface 910 of the core wire 91 and the terminal 8. The position where the colored member 5 is disposed is the place where the adhesive 3 that has been melted and fluidized is most difficult to reach. For this reason, if the color of the adhesive 3 overflowing from the one end 21 of the heat shrinkable tube 2 is the second color, the adhesive 3 reaches the place where the fluidized adhesive 3 is most difficult to reach. Can be judged. In this case, the accuracy of the water-stop confirmation is further improved.

<Application example>
In the heat shrinkable tube disposing step, the heat shrinkable tube and the adhesive may be separately disposed. That is, in the heat shrinkable tube disposing step, for example, in the state where the solid adhesive is disposed on the core wire connecting portion of the terminal of the terminal-attached electric wire, the heat shrinkable tube is covered so that the heat shrinkable tube before shrinking covers the periphery. It is also conceivable that is provided.

  Moreover, the case where a coloring member is arrange | positioned in positions other than the position nearest to the one main surface of a terminal among the front end surfaces of a core wire is also considered. For example, in the thickness direction of the terminal, the coloring member may be disposed at the center position of the front end surface of the core wire or the position farthest from one main surface of the terminal.

  In addition, the electric wire module manufacturing method and electric wire module which concern on this invention can combine embodiment and application example which were shown above freely within the range of the invention described in each claim, or embodiment and application example. It is also possible to configure by appropriately modifying or omitting a part.

DESCRIPTION OF SYMBOLS 1 Water stop tube 100 Electric wire module 2 Heat-shrinkable tube 21 One end 29 The other end 3 Adhesive 5 Coloring member 7 Electric wire with a terminal 8 Terminal 80 One main surface 81 Opposite side connection part 82 Core wire connection part 83 Covering connection part 88 One end 89 Other End 9 Insulated wire 91 Core wire 910 End face 92 Insulation coating

Claims (3)

An insulated wire comprising a core wire and an insulating coating covering the periphery of the core wire; a mating connection portion provided on one end side and connectable to a mating member; and the insulated wire provided on the other end side relative to the mating side connection portion A terminal including a core wire connection portion connected to the core wire exposed at an end of the core wire, while arranging the thermoplastic first color adhesive around the core wire connection portion of the electric wire with terminal. A heat-shrinkable tube disposing step of covering the periphery of the connecting portion with a heat-shrinkable tube before shrinking;
A coloring member disposing step of disposing a coloring member of a second color different from the first color at a position facing a front end surface of the core wire connected to the core wire connecting portion of the terminal;
And a heating step of heating and shrinking the heat-shrinkable tube before shrinkage in a state where the heat-shrinkable tube before shrinkage covers the periphery of the core wire connecting portion. It is an electric wire module manufacturing method of Claim 1, Comprising:
In the coloring member disposing step, the coloring member is disposed at a position where the coloring member is in contact with the leading end surface of the core wire and the main surface on the core wire side among the terminals. An insulated wire comprising a core wire and an insulating coating covering the periphery of the core wire; a mating connection portion provided on one end side and connectable to a mating member; and the insulated wire provided on the other end side relative to the mating side connection portion A terminal including a core wire connecting portion connected to the exposed core wire of the end of
A water-stopping seal that includes a heat-shrinkable tube and a thermoplastic adhesive formed on the inner peripheral surface of the heat-shrinkable tube, and adheres closely to the core wire connection portion of the terminal in a contracted state to cover the periphery of the core wire connection portion A tube, and
Of the adhesive, the portion of the heat shrinkable tube that has solidified in a state of overflowing from one end of the terminal on the mating connection side is the adhesive in the heat shrinkable tube after shrinking. An electric wire module that is colored in a color different from that around the core wire connecting portion.

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