JP2011165376A - Method of manufacturing short-circuit portion of wire harness, and short-circuit portion of wire harness - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a short-circuit portion of wire harness and a short-circuit portion of a wire harness, for use in an area requiring waterproofing without significantly increasing the cost. <P>SOLUTION: A connector JC is prepared which includes a short-circuit member 30 for shorting branch wires 14 each other and a housing 40 which holds the short-circuit member 30 so that a wire-side terminal 20 is connected to the short-circuit member 30 inside. A plurality of branch wires 14 are connected to the connector JC for the branch wires 14 to be short-circuited each other. An electric contact point protection agent G which is fluent and prevents entrance of water content is packed inside the housing 40. A curing type resin in fluent state is attached so that an opening of the housing 40 is covered. The curing type resin is cured to form a flow-out prevention layer 55 which prevents the electric contact point protection agent G from flowing out of the opening. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method of manufacturing a short-circuit unit in which a plurality of electric wires are bundled, and in a wire harness provided in a vehicle such as an automobile, the specific electric wires drawn from the bundled electric wires are short-circuited, and this The present invention relates to a short-circuit portion, and particularly relates to a method for manufacturing a short-circuit portion of a wire harness that can be used in an area that requires waterproofing and a short-circuit portion of a wire harness.

  Conventionally, as a wire harness used in a vehicle, a trunk line formed by bundling a plurality of electric wires, and a plurality of specific electric wires (branch wires) drawn from the trunk line among the electric wires included in the trunk line are short-circuited by a short circuit. The thing provided with the short circuit part was known. In this short circuit portion, a joint connector has been used as means for forming the short circuit.

  When a wire harness that includes such a short-circuited part is used in an area that requires waterproofing (waterproof area), it can be used as a joint connector to prevent moisture from entering inside and causing problems such as terminal rust and leakage. A waterproof connector was used.

  As this waterproof connector, the thing of patent document 1 is known, for example. As shown in FIGS. 9 and 10, the waterproof connector includes a plurality of connector-side terminals 201 to which wire-side terminals 221 provided at the ends of the wires 220 are connected, and an insulating housing 202 that holds the connector-side terminals. And a waterproof lid 210 for preventing moisture from entering the insulating housing 202, and a holder 203 for fixing the waterproof lid 210 to the insulating housing 202. The insulating housing 202 has a plurality of terminal housing chambers 204 in the shapes corresponding to the connector-side terminals 201 in a shape in which the electric-wire-side terminals 221 can be inserted in order to be connected to the connector-side terminals 201.

  In such a waterproof connector 200, the opening 204 a of each terminal accommodating chamber 204 is closed with the waterproof lid 210 in a state where the electric wire side terminal 221 is inserted into the terminal accommodating chamber 204 and connected to the connector side terminal 201. By fixing 210 to the insulating housing 202 with the holder 203, the intrusion of moisture into the insulating housing 202 (that is, the waterproof connector 200) is prevented (see FIG. 10), and rusting or leakage of the terminal due to the intrusion is prevented. It is.

JP 2009-43444 A

  However, the waterproof connector 200 as described above has a complicated structure, increases the number of parts, and is expensive as compared with a general non-waterproof joint connector.

  In view of such circumstances, the present invention provides a method for manufacturing a short-circuit portion of a wire harness that can be used in an area requiring waterproofing without causing a significant increase in cost, and a short-circuit of the wire harness. It is an issue to provide a department.

  Then, in order to solve the said subject, this invention is a manufacturing method of the short circuit part of the wire harness which short-circuits several specific branch electric wires pulled out from the trunk line formed by bundling a plurality of electric wires. A short-circuit member that short-circuits each of the branch wires by being connected to a wire-side terminal provided at each end of the branch wire, and the short-circuit member so that the wire-side terminal is connected to the short-circuit member therein A connecting step of short-circuiting the branch wires by connecting each wire-side terminal of the plurality of branch wires to a short-circuit member of the joint connector; It has fluidity and prevents the ingress of moisture so as to seal each wire side terminal and the short-circuited portion in the interior. A filling step of filling an electrical contact protective agent for the liquid, and a curable resin in a state of fluidity so as to cover an opening through which the electrical contact protective agent filled in the insulating housing can flow out. An adhering step of adhering, and a curing step of forming an outflow prevention layer that prevents the electrical contact protective agent filled in the filling step from flowing out from the opening by curing the curable resin. It is characterized by providing.

  According to such a configuration, a non-waterproof joint connector that is less expensive than a waterproof connector is used as a means for forming a short circuit to manufacture a short circuit portion of a wire harness that can be used in a waterproof area. Can do. Therefore, a significant increase in the manufacturing cost of the short circuit portion of the wire harness can be suppressed. That is, a reliable waterproof process can be applied to the non-waterproof joint connector after each branch wire is connected by the filling process, the attaching process, and the curing process.

  Specifically, in the filling process, it is easy to simply fill the fluidized electrical contact protector into the inside of the insulating housing in which each wire side terminal is short-circuited by connection between each wire side terminal and the short-circuit member. The work prevents moisture from entering the inside of the insulating housing, and forms a state in which each wire-side terminal and the short-circuit member are protected from moisture. In this state, further, a curable resin having fluidity is attached to an appropriate position on the surface of the insulating housing in the attaching step, and thereafter, the electric contact protective agent is confined in the insulating housing by a simple operation of curing the resin. An outflow prevention layer for preventing outflow can be formed. Therefore, waterproofing can be performed with a simple process without using a sealing material made of rubber or the like and a special structure for holding the sealing material.

  In the method for manufacturing the short-circuit portion of the wire harness according to the present invention, the curable resin is a photocurable resin that is cured by being irradiated with light, and is attached to the insulating housing by the adhesion step in the curing step. It is preferable to cure the photocurable resin by irradiating the photocurable resin with light.

  According to such a configuration, it is not necessary to apply heat when the resin is cured like a thermosetting resin (or thermosetting resin), and therefore an insulating housing made of a material that is not resistant to heat can be used. In addition, the photo-curing resin can be cured in a short time by irradiating light compared to a resin that is cured using natural drying or humidity in the air, thereby shortening the manufacturing time. Can do.

  Moreover, in order to eliminate the said subject, this invention is a short circuit part of a wire harness, Comprising: The several branch electric wire pulled out from the trunk line formed by bundling a plurality of electric wires, and was provided with the electric wire side contact in each terminal, respectively And a short-circuit member that connects each of the wire-side terminals to short-circuit the branch wires, and an insulating housing that holds the short-circuit member so that the wire-side terminal is connected to the short-circuit member therein. Electrical contact protection for filling the inside of the insulating housing so as to seal the connector, the electric wire side terminals and the short-circuit member in a connected state, and having fluidity and preventing moisture from entering The contact and the electrical contact protection agent filled in the inside of the insulating housing cover the opening from which the outside can flow out, and the electrical contact protection filled from the opening There characterized in that it comprises a runoff prevention layer for preventing the flowing out.

  According to the short-circuit portion of this wire harness, even if a non-waterproof joint connector that is less expensive than a waterproof connector is used as a means for forming a short-circuit circuit in order to suppress a significant increase in manufacturing cost, a waterproof area is required. Can be used in

  Specifically, in the short-circuit portion, the filled electrical contact protector prevents moisture from entering the inside of the insulating housing and protects each wire-side terminal and the short-circuit member from this moisture. And the outflow prevention layer which covers the suitable place of an insulating housing prevents the outflow of the electrical contact protective agent which has fluidity | liquidity to the exterior of the insulating housing, and maintains the protection state by the electrical contact protective agent of each electric wire side terminal and a short circuit member.

  As described above, according to the present invention, there is provided a method for manufacturing a short-circuit portion of a wire harness that can be used in an area requiring waterproofing, and a short-circuit portion of the wire harness, without significantly increasing costs. can do.

It is a perspective view which shows the state by which the common joint connector was connected to the terminal of several branch electric wires in the manufacture process of the short circuit part of the wire harness which concerns on this embodiment. It is a perspective view which shows the state by which the said short circuit part was fixed on the trunk line using the tape for trunk lines. It is a joint connector contained in the said short circuit part, Comprising: (A) is a rear view, (B) is the IIIB-IIIB longitudinal cross-sectional view of FIG. 3 (A). It is a cross-sectional bottom view of the joint connector. (A) shows the state to which the branch electric wire was connected to the IIIB-IIIB longitudinal cross-sectional view, (B) is a perspective view of the joint connector in the state to which the branch electric wire was connected. 5A shows a state in which the electrical contact protective agent is filled in the insulating housing of FIG. 5A, and FIG. 5B shows that the electrical contact protective agent is filled in the insulating housing of FIG. 5A. Indicates the state. 6A shows a state in which an outflow prevention layer is formed on the surface of the insulating housing in FIG. 6A, and FIG. 6B shows a state in which the outflow prevention layer is formed on the surface of the insulating housing in FIG. Show. The state in which the outflow prevention layer was formed only in the opening part in the insulating housing of FIG. 6 (A) is shown. It is a longitudinal cross-sectional view of the state which decomposed | disassembled the conventional waterproof connector. It is a longitudinal cross-sectional view of the said waterproof connector.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 thru | or FIG. 7 (B) shows the process for manufacturing the short circuit part 110 of the wire harness 100 which concerns on this embodiment. As shown in FIGS. 1 and 2, the wire harness 100 includes a trunk line 12 in which a plurality of electric wires 10 are bundled, and a plurality of electric wires 10 among the electric wires 10 constituting the trunk line 12 as branch wires 14. 12 includes a short-circuit part 110 that is short-circuited between the branch wires and a trunk tape 18 that is wound around the trunk 12 in order to maintain a bundled state of the plurality of wires 10. In the short circuit part 110, the joint connector JC is used as a means for forming a short circuit for short-circuiting the respective branch wires.

  Specifically, the short-circuit part 110 of the wire harness 100 according to this embodiment is manufactured by the following procedure.

<1> Wiring of electric wires 10 A plurality of electric wires 10 are bundled to form a trunk line 12, and a plurality of electric wires 10 (four in this embodiment) are used as branch electric wires 14. It is drawn from the main line 12. For each electric wire 10, a so-called covered electric wire is used, and the electric wire 10 has a conductor and an insulating coating that covers the conductor.

  In addition, in this embodiment, in order to connect each branch electric wire 14 to the common joint connector JC, the electric wire side terminal 20 as shown to FIG. The electric wire side terminal 20 has a female electrical contact portion 22 and an electric wire crimping portion 24 at the front and rear. The electrical contact portion 22 is formed in a hollow rectangular tube shape. From the bottom wall of the electrical contact portion 22, a locked piece 28 for locking to the joint connector JC protrudes outward.

  The terminal of each branch electric wire 14 is previously subjected to a treatment for removing the insulating coating and exposing the conductor, and the electric wire crimping portion 24 embraces the terminal of the conductor and the insulating coating in the vicinity thereof. By being bent, it is crimped to the end of the branch wire 14 and is electrically connected to the conductor.

<2> Connection of branch wire 14 to joint connector JC By connecting the wire-side terminal 20 mounted on each branch wire 14 to the joint connector JC as shown in FIG. 3 (A) to FIG. 4, The electric wire side terminals 20 are short-circuited.

  The joint connector JC according to the present embodiment includes a single short-circuit conductor (short-circuit member) 30 and an insulating housing 40 for holding the short-circuit conductor 30. The short-circuiting conductor 30 is made of a conductive material, and is short-circuited between the electric wire side terminals 20 by being commonly connected to the electric wire side terminals 20. The insulating housing 40 is integrally formed of an insulating material such as a synthetic resin, and has a shape capable of holding the short-circuiting conductor 30 in a state of being housed inside (terminal housing chamber 47), specifically, the short circuit. The conductor 30 has a wide shape in the thickness direction.

  The short-circuiting conductor 30 according to this embodiment is formed of a short-circuiting metal plate formed by punching a single metal plate into an appropriate shape, and a plurality of electrical contact portions 32 and the short-circuiting portion 34 are integrated. Have. Each electric contact portion 32 is a male (tab) fitting portion that can be fitted into the female electric contact portion 22 of each electric wire side terminal 20, and these electric contact portions 32 are parallel to the width direction thereof. Is arranged. The short-circuit portion 34 extends in the arrangement direction of the electrical contact portions 32, and the proximal end of each electrical contact portion 32 is connected to the short-circuit portion 34.

  The insulating housing 40 includes a flat top wall 41, a bottom wall 42 facing the top wall 41 at a predetermined interval, and both end portions in the width direction of both walls 41, 42 (that is, left end portions and right side portions). And a pair of side walls 44 that respectively connect the end portions). These walls 41, 42, 44 constitute the outer wall of the insulating housing 40. The top wall 41 and the bottom wall 42 have the same contour shape in plan view, and the rear end portion is formed wider than the front portion (see FIG. 4).

  The rear end side (the right end side in FIG. 3B) of the outer wall constitutes a conductor holding portion 43A and a protective agent injection portion 43B. The conductor holding portion 43A and the protective agent injecting portion 43B are lined up and down in the insulating housing 40 as shown in FIG. The short-circuit portion 34 of the short-circuiting conductor 30 is press-fitted into the conductor holding portion 43A from the opening 43a provided at the rear end of the insulating housing 40, whereby the short-circuit portion 34 is held by the conductor holding portion 43A. Further, the fluid contact protective agent G having fluidity is injected into the protective agent injection portion 43B from the opening 43b provided at the rear end of the insulation housing 40, so that the interior of the insulation housing 40 becomes the electrical contact protection agent G. Filled by.

  The conductor holding portion 43 </ b> A has a shape that holds the short-circuit portion 34 of the short-circuit conductor 30. Specifically, it is a portion that is slightly larger than the short-circuit portion 34 and extends in the arrangement direction of the electrical contact portions 32 of the short-circuit conductor 30 above the protective agent injection portion 43B. In addition, the conductor holding portion 43A has a short-circuiting metal plate insertion opening 43a into which the short-circuit portion 34 can be inserted from behind (rightward in FIG. 3B). The short-circuit portion 34 is press-fitted into the conductor holding portion 43A from the insertion port 43a in a posture in which each electrical contact portion 32 faces forward. More specifically, projections 34a as shown in FIG. 4 are formed at both ends in the width direction of the short-circuit portion 34, and these projections 34a bite into the inner surface of the conductor holding portion 43A, thereby short-circuiting to the conductor holding portion 43A. The part 34 is fixed.

  The protective agent injecting portion 43 </ b> B has a shape for guiding the electrical contact protective agent G injected from the opening 43 b to the terminal accommodating chamber 47. Specifically, the protective agent injection portion 43B is a portion that extends in the arrangement direction of the electrical contact portion 32 of the short-circuiting conductor 30 together with the conductor holding portion 43A below the conductor holding portion 43A. The protective agent injecting portion 43 </ b> B has an injection passage 50 communicating with the terminal accommodating chamber 47 on the lower side of the short-circuit conductor 30. The injection passage 50 communicates with the external space of the insulating housing 40 through an injection opening 43b opened at the rear end of the protective agent injection portion 43B. Through this injection passage 50, the electrical contact protective agent G injected into the protective agent injection portion 43B from the injection opening 43b can flow into each terminal accommodating chamber 47.

  A plurality (three in the figure) of partition walls 45 that are substantially parallel to the side walls 44 are arranged in the connector width direction at a portion in front of the conductor holding portion 43A. Each partition wall 45 defines a terminal accommodating chamber 47 between another partition wall 45 or the side wall 44 adjacent to the partition wall 45. Each terminal accommodating chamber 47 has a shape that opens forward and allows the electric wire side terminal 20 to be inserted through the opening. Each terminal accommodating chamber 47 communicates with the injection passage 50 at the lower part on the rear side. Each electrical contact portion 32 of the short-circuiting conductor 30 protrudes from the rear in each terminal accommodating chamber 47, and the electrical contact portion 22 of the electric wire side terminal 20 inserted into the terminal accommodating chamber 47 is connected to the electrical contact portion 32. The electric wire side terminal 20 and the short-circuiting conductor 30 are electrically connected by fitting.

  The bottom wall 42 has a step shape in which the position corresponding to the protective agent injection portion 43B is lowered by one step below the front portion thereof (see FIG. 3B), and the bottom wall 42 is provided in each terminal accommodating chamber 47 of the step portion 42a. A lance (terminal locking portion) 46 is provided at a corresponding position. Each lance 46 projects rearward from the stepped portion 42a along the boundary position between the injection passage 50 and the terminal accommodating chamber 47, and can be bent and deformed in the thickness direction of the bottom wall 42. A claw-like locking portion 46a is formed at the free end. The locking portion 46a is bent and deformed by coming into contact with the inserted electric wire side terminal 20, and is allowed to pass downward, allowing the electric wire side terminal 20 to pass through, and elastically returning to the normal position after the passage. Thus, the locked piece 28 of the electric wire side terminal 20 is restrained from the rear (see FIG. 5A). That is, the lance 46 locks the electric wire side terminal 20 at a position where the electric wire side terminal 20 is fitted to the electric contact portion 32.

  Thus, in the joint connector JC, the wire-side terminal 20 at the end of each branch wire 14 is inserted into the terminal accommodating chamber 47 and fitted into the electrical contact portion 32 of the short-circuiting conductor 30. Short-circuiting between the wire-side terminals 20 using the short-circuiting conductor 30 as a medium is achieved (see FIGS. 5A and 5B).

  Since the non-waterproof joint connector JC is used in the present embodiment, moisture may enter the inside of the insulating housing 40 when the branch wire 14 is simply connected to the joint connector JC as described above. . Therefore, in order to be able to be used even in a waterproof area, the joint connector JC to which each branch wire 14 is connected is subjected to a waterproof treatment using a fluid electrical contact protective agent G and a curable resin, which will be described below. . Thereby, although it is a simple operation | work, an effective waterproofing process is performed and the short circuit part 110 of the wire harness 100 which can be used in a waterproof area is formed.

<3> Filling the joint connector JC with the electrical contact protective agent G As shown in FIGS. 6A and 6B, each branch wire 14 is connected to the joint connector JC to form the short circuit portion 110. By filling the inside of the insulating housing 40 with the electrical contact protective agent G having fluidity in a state where the electrical contact portions 22 of the short-circuiting conductors 30 and the electric wire side terminals 20 are respectively fitted. The electric wire side terminals 20 and the short-circuiting conductor 30 are sealed.

  In the joint connector JC of the present embodiment, the electrical contact protective agent G is injected from the injection opening 43b of the protective agent injection portion 43B. Since the electrical contact protective agent G has fluidity, the electrical contact protective agent G flows into the terminal accommodating chambers 47 through the injection passages 50 by being press-fitted from the injection openings 43b. The electrical contact protective agent G is injected until the inside of the insulating housing 40 is filled with the electrical contact protective agent G without a gap. Specifically, the electrical contact protection agent G injected from the injection opening 43b at the rear end of the insulating housing 40 is protected until it comes out from the front opening of each terminal accommodating chamber 47 at the front end of the insulating housing 40. Agent G is injected.

  As described above, the electrical contact protective agent G is filled in the insulating housing 40 in a state where the electric wire side terminals (that is, the branched electric wires) are short-circuited by the connection between the electric wire side terminals 20 and the shorting conductor 30. With this simple operation, moisture can be prevented from entering the inside of the insulating housing 40 by the filled electrical contact protector G, and the electric wire side terminals 20 and the short-circuiting conductor 30 are protected from moisture. Is formed.

  In the present embodiment, grease is used as the electrical contact protective agent G filled in the insulating housing 40, but is not limited thereto. That is, the electrical contact protective agent G fills the inside of the insulating housing 40 to prevent moisture from entering the inside, thereby protecting each of the wire side terminals 20 and the short-circuiting conductor 30 from the moisture, and the wire side terminals. 20, as long as it does not cause a chemical reaction even if it contacts the shorting conductor 30 and the insulating housing 40. In addition, the electrical contact protective agent G also needs to have a predetermined fluidity so that it can be injected into the interior of the insulating housing 40 after the branch wires 14 are connected to the joint connector JC and filled without any gaps. . However, the electrical contact protective agent G has such a viscosity that it can remain inside the insulating housing 40 until it fills the inside of the insulating housing 40 and forms an outflow prevention layer 55 described later. preferable.

<4> Formation of Outflow Prevention Layer 55 Covering Joint Connector JC When the electrical contact protective agent G is filled in the insulating housing 40 as described above, as shown in FIGS. 7 (A) and 7 (B). In addition, by forming the outflow prevention layer 55 that covers the insulating housing 40, the filled electrical contact protective agent G is confined inside the insulating housing 40 and the outflow is prevented. This outflow prevention layer 55 is made of a curable resin.

  In order to form the outflow prevention layer 55, a step of attaching a curable resin having fluidity so as to cover the insulating housing 40 filled with the electrical contact protective agent G, and the attached curable resin And a step of curing.

  In the step of attaching the curable resin, the joint connector JC in a state where the branch wires 14 are connected is immersed in the curable resin having a fluidity (a state before curing) stored in a container or the like. Thereafter, when the joint connector JC is pulled up from the stored curable resin, the curable resin is attached to the entire surface of the insulating housing 40. That is, the joint connector JC to which the branch wire 14 is connected is stored in a stored curable resin having a fluidity, and the joint connector JC is submerged so as to be completely immersed, and then lifted up, thereby allowing the curable resin in a fluid state to flow. The insulating housing 40 is covered without a gap.

  Next, in the step of curing the curable resin, the curable resin covering the joint connector JC is cured by a predetermined method. For example, in this embodiment, a UV curable resin (ultraviolet curable resin) is used as the curable resin, and in this case, ultraviolet rays are irradiated. In addition, when a thermosetting resin is used as the curable resin, heat is applied, and the visible light curable resin is irradiated with visible light.

  The outflow prevention layer 55 covering the insulating housing 40 is formed by curing the curable resin. The outflow prevention layer 55 insulates the electrical contact protective agent G by covering the entire insulating housing 40 including an opening through which the electrical contact protective agent G filled in the insulating housing 40 can flow out. The inside of the housing 40 is confined to prevent outflow to the outside.

  As described above, the waterproof treatment is applied to the non-waterproof joint connector JC, so that even if the short-circuit portion 110 including the joint connector JC is disposed in the waterproof area, moisture can be prevented from entering the insulating housing 40. As a result, rust and leakage of the terminals 20 and 30 in the short-circuit portion 110 are prevented.

  In addition, the short circuit part 110 formed in this way is arrange | positioned on the trunk line 12, and the tape 18 for trunk lines spirals around the electric wire 10 which comprises the said trunk line 12 so that the binding state may be maintained. Wound (see FIG. 2). Thereby, the harness 100 including the short-circuit portion 110 that can be used in the waterproof area is completed.

  By manufacturing the short circuit portion 110 as described above, the short circuit portion of the non-waterproof joint connector JC, which is cheaper than the waterproof connector, can be used to manufacture the short circuit portion 110 of the wire harness 100 that can be used in the waterproof area. It can be used as a means for forming. Therefore, a significant increase in the manufacturing cost of the short-circuit portion 110 of the wire harness 100 can be suppressed. That is, the step of filling the electrical contact protective agent G to the insulating housing 40 of the non-waterproof joint connector JC after each branch wire 14 is connected and the UV curable resin is adhered and cured to cure the outflow prevention layer 55. A reliable waterproofing treatment can be performed by the step of forming the.

  Specifically, in the step of filling the electrical contact protective agent G, the electric wire side terminals 20 and the shorting conductor 30 are connected to each other so that the electric wire side terminals are short-circuited with each other. By a simple operation of simply filling the electrical contact protective agent G, moisture can be prevented from entering the inside of the insulating housing 40, and a state where each electric wire side terminal 20 and the short-circuiting conductor 30 are protected from moisture is formed. The In this state, the electrical contact protective agent G is confined in the insulating housing 40 by a simple operation of adhering a fluid curable resin to the surface of the insulating housing 40 and thereafter curing the resin. An outflow prevention layer 55 that prevents outflow can be formed. Therefore, waterproofing can be performed with a simple process without using a sealing material made of rubber or the like and a special structure for holding the sealing material.

  In addition, when a UV curable resin is used as the curable resin as in the present embodiment, it is not necessary to apply heat when the resin is cured like a thermosetting resin (or thermosetting resin). It is possible to use an insulating housing 40 made of a material that is not strong against the material. In addition, the UV curable resin can be cured in a short time by irradiating with ultraviolet rays as compared with a resin that is cured using natural drying or humidity in the air, thereby shortening the manufacturing time. it can.

  In addition, the manufacturing method of the short circuit part of the wire harness of this invention and the short circuit part of a wire harness are not limited to the said embodiment, Of course, various changes can be added in the range which does not deviate from the summary of this invention. It is.

  For example, in the above embodiment, the outflow prevention layer 55 is formed so as to cover the entire insulating housing 40, but the present invention is not limited to this. That is, as shown in FIG. 8, the outflow prevention layer covers only the opening portion of the insulating housing 40 through which the electrical contact protective agent G (electrical contact protective agent) filled therein can flow out. It may be formed. By covering such an opening with the outflow prevention layer, it is possible to prevent outflow of the electrical contact protective agent G filled in the inside of the insulating housing 40 without covering other portions of the insulating housing 40.

  The curable resin is not limited to a UV curable resin, a thermosetting resin, or a visible light curable resin. The curable resin may be a resin that is cured by natural drying or moisture in the air. That is, the curable resin may be a resin that has fluidity when attached to the insulating housing 40 and can be cured by a predetermined method (light irradiation, heating, drying, etc.) thereafter.

  Further, when adhering the curable resin to the insulating housing 40, the curable resin is not limited to so-called dip soaking after immersing the insulating housing in the curable resin stored in a container or the like. You may make it adhere by methods, such as spraying.

10 Electric wire 12 Trunk line 14 Branch electric wire 30 Short-circuiting conductor (short-circuit member)
40 Insulating housing 55 Outflow prevention layer 100 Wire harness 110 Short-circuit part G Electrical contact protective agent JC Joint connector

Claims (3)

A method for manufacturing a short-circuit portion of a wire harness that short-circuits a plurality of specific branch wires drawn from a trunk line in which a plurality of wires are bundled,
The wire side terminals provided at the terminals of the plurality of branch wires are connected to each other so that the branch side wires are short-circuited with each other, and the wire side terminals are connected to the short-circuit member therein. Preparing a joint connector including an insulating housing holding a short-circuit member, and connecting each of the plurality of branch electric wires to the short-circuit member of the joint connector to short-circuit the branch wires, and
Fill the inside of the insulating housing with an electrical contact protective agent that has fluidity and prevents moisture from entering so as to seal each wire-side terminal and the short-circuit portion in a connected state. Filling process to
An attaching step of attaching a curable resin in a state of fluidity so as to cover an opening through which the electrical contact protective agent filled in the insulating housing can flow out to the outside;
And a curing step of forming an outflow prevention layer that prevents the electrical contact protective agent filled in the filling step from flowing out from the opening by curing the curable resin. Manufacturing method of short circuit part of wire harness. In the manufacturing method of the short circuit part of the wire harness according to claim 1,
The curable resin is a photocurable resin that cures when irradiated with light,
In the curing step, the photocurable resin attached to the insulating housing by the attaching step is irradiated with light to cure the photocurable resin. A short circuit portion of the wire harness,
A plurality of branch wires that are drawn from a trunk line in which a plurality of wires are bundled and each terminal is provided with a wire-side contact;
A joint connector having a short-circuit member that connects each of the electric wire-side terminals and short-circuits the branch wires, and an insulating housing that holds the short-circuit member so that the electric-wire-side terminal is connected to the short-circuit member therein; ,
An electrical contact protective agent for filling the inside of the insulating housing so as to seal each wire side terminal and the short-circuit member in a connected state, having fluidity and preventing moisture from entering,
An outflow for covering the opening through which the electrical contact protective agent filled in the insulating housing can flow out to prevent the filled electrical contact protective agent from flowing out from the opening. The short circuit part of the wire harness characterized by including a prevention layer.

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