JP2016157619A - Manufacturing method of wire with connector and wire with connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a wire extending to a base end side of a connector being pressed with a strong force to an opening peripheral part of a connector cavity.SOLUTION: The manufacturing method of a wire with a connector includes the steps of: (a) twisting a plurality of wires 30 extending from a connector 20; and (b) forming a coating part by spirally winding a tape 41 over a part from the connector 20 to the wires 30 while maintaining a state where the wires 30 are being twisted. After the step (b), the twisted plurality of wires 30 may be untwisted.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an electric wire with a connector including an electric wire and a connector connected to an end portion of the electric wire.

  In a wire harness mounted on a vehicle such as an automobile, an electric wire with a connector includes an insulated wire and a connector connected to an end thereof.

  Moreover, in the electric wire with a connector, for example, as shown in Patent Document 1, a waterproof structure that prevents the intrusion of liquid such as water into the gap between the insulated electric wire and the connector connected to the end thereof may be adopted. is there.

  In Patent Document 1, an ultraviolet curable adhesive tape having a two-layer structure of a base made of a tape-like ultraviolet curable resin and an adhesive is wound around the portion extending from the connector to the electric wire with the adhesive inside, and cured. Waterproofing is intended.

JP 2013-187004 A

  However, according to the technique disclosed in Patent Document 1, the plurality of electric wires extending to the base end side of the connector are bound by an adhesive tape. For this reason, there exists a possibility that each electric wire may be pressed by strong force with respect to the opening peripheral part of the cavity of a connector.

  Then, an object of this invention is to suppress that the electric wire extended to the base end side of a connector is pressed against the opening peripheral part of the cavity of a connector with big force.

  In order to solve the above-mentioned problem, a manufacturing method of an electric wire with a connector according to a first aspect includes (a) a step of twisting a plurality of electric wires extending from a connector, and (b) a state in which the plurality of electric wires are twisted And a step of forming a covering portion by spirally winding a tape around a portion extending from the connector to the electric wire.

  A 2nd aspect is a manufacturing method of the electric wire with a connector concerning the 1st aspect, Comprising: In the above-mentioned process (a), in the position away from the above-mentioned connector, a plurality of above-mentioned electric wires are twisted and gathered It is a thing.

  A 3rd aspect is a manufacturing method of the electric wire with a connector concerning the 2nd aspect, Comprising: In the above-mentioned process (b), a part near the connector among the parts gathered by twisting among the plurality of electric wires, or its The tape is wound spirally toward the base end of the connector, starting from the portion closer to the connector than the portion.

  A 4th aspect is a manufacturing method of the electric wire with a connector concerning the 2nd aspect, Comprising: In the said process (b), the said tape is helically wound toward the said electric wire from the base end part of the said connector. I tried to go.

  5th aspect is a manufacturing method of the electric wire with a connector which concerns on any one 1st-4th aspect, Comprising: The said several electric wire twisted is twisted back after the said process (b). A process.

  A sixth aspect is a method for manufacturing an electric wire with a connector according to the fifth aspect, and in the step (b), the tape is adhered only to a portion from one side of one main surface of the belt-like base material. The layer was formed, and the tape was wound while adhering the surrounding layers of the tape with the adhesive layer.

  The electric wire with a connector according to the seventh aspect is a connector, a plurality of electric wires that are twisted while extending to the proximal end side of the connector, and a tape spirally wound around a portion extending from the connector to the electric wire. And a covering portion formed by being attached.

  According to the 1st-7th aspect, a tape is wound in the state which maintained the state stabilized to some extent by twisting a some electric wire. For this reason, the winding force of the tape or the like is unlikely to act as a force that presses the electric wire against the peripheral edge of the opening of the connector cavity with a large force. Thereby, it can suppress that the electric wire extended to the base end side of a connector is pressed by the opening peripheral part of the cavity of a connector with big force.

  According to the second aspect, in the step (a), since the plurality of electric wires are twisted and gathered at a position away from the connector, the electric wires extend toward the base end side of the connector and are gently inclined. To do. For this reason, it is difficult for the electric wire extending to the proximal end side of the connector to be pressed against the opening peripheral edge of the cavity of the connector with a large force.

  According to the third aspect, the tape is attached to the base end portion of the connector, starting from the portion near the connector or the portion closer to the connector than the portion of the plurality of twisted and gathered portions of the plurality of electric wires. Since the plurality of electric wires are twisted and kept in a stable state to some extent when being wound in a spiral shape, the plurality of electric wires are difficult to bind tightly. For this reason, it is difficult for the electric wire extending to the proximal end side of the connector to be pressed against the opening peripheral edge of the cavity of the connector with a large force.

  According to the fourth aspect, when the tape is spirally wound from the proximal end portion of the connector toward the electric wire, a plurality of electric wires are twisted to maintain a stable state to some extent. Therefore, it is difficult for a plurality of electric wires to be tightly bound. For this reason, it is difficult for the electric wire extending to the proximal end side of the connector to be pressed against the opening peripheral edge of the cavity of the connector with a large force.

  According to the 5th aspect, a some electric wire can be extended as straight as possible from a connector.

  According to the sixth aspect, in the step (b), the tape is a tape-shaped base material in which an adhesive layer is formed only on one side from one main surface, and the tape is formed by the adhesive layer. Since the tape is wound while adhering between the surrounding layers, the covering portion is hardly exposed inside the covering portion. For this reason, a coating | coated part is hard to stick to the some electric wire inside, and is easy to twist back a some electric wire.

It is a schematic perspective view which shows the electric wire with a connector which concerns on embodiment. It is a schematic sectional drawing which shows an electric wire with a connector same as the above. It is explanatory drawing which shows the manufacturing method of an electric wire with a connector. It is explanatory drawing which shows the manufacturing method of an electric wire with a connector. It is explanatory drawing which shows the manufacturing method of an electric wire with a connector. It is a schematic perspective view which shows an example of a tape. It is explanatory drawing which shows the overlapping state of the tape in a coating | coated part. It is explanatory drawing which shows the manufacturing method of an electric wire with a connector. It is explanatory drawing which shows the manufacturing method of the electric wire with a connector which concerns on a modification.

  Hereinafter, the manufacturing method of the electric wire with a connector and the electric wire with a connector concerning an embodiment are explained.

  FIG. 1 is a schematic perspective view showing an electric wire 10 with a connector, and FIG. 2 is a schematic cross-sectional view showing the electric wire 10 with a connector.

  The electric wire with connector 10 includes a connector 20, a plurality of electric wires 30, and a covering portion 40. The electric wire with connector 10 is used as a wiring material in a vehicle, for example.

  The connector 20 is a member molded by an insulating material such as a resin, and has a rectangular parallelepiped appearance here. The connector 20 has a plurality of cavities 22 (see FIG. 3) penetrating from the distal end side (side connected to the mating connector) to the proximal end side (opposite the distal end). Usually, the plurality of cavities 22 are formed to be aligned in the width direction of the connector 20. The plurality of cavities 22 may be formed in a plurality of rows in the vertical direction of the connector 20 or may be formed in only one row. A terminal is accommodated and held in the cavity 22. And the connector in the cavity 22 of this connector 20 and the terminal by the side of the other party connector are connected by this connector 20 and the other party connector being connector-connected.

  The electric wire 30 is configured such that a coating portion is formed by extrusion coating or the like of an insulating resin on the outer periphery of a conductive core wire. The core wire is formed using aluminum or an aluminum alloy as a material. However, the core wire may be formed using other metals such as copper or copper alloy as a material. The electric wire 30 is used to electrically connect various electric devices mounted on a vehicle or the like in a state where the electric wire 30 is disposed at an arrangement target location of the vehicle or the like.

  At the end of the electric wire 30, the covering portion is removed and the core wire is exposed for a predetermined length. A terminal is crimped to the exposed core wire. The terminal is formed using copper, tin or the like as a main material. But the terminal may be formed from other metals, such as aluminum.

  The terminal includes a wire fixing part and a connection part. The electric wire fixing portion is configured by a covered crimp portion that is crimped to the sheath portion of the electric wire 30 and a core wire crimp portion that is crimped to the core wire. A connection part is a part electrically connected with the other party's terminal. The connecting portion may have a cylindrical female terminal shape, or may have a tab-shaped or pin-shaped male terminal shape.

  The terminal is inserted into the cavity 22 from the proximal end side of the connector 20 while being connected to the end of the electric wire 30, and is locked and fixed in the cavity 22. In this state, the plurality of electric wires 30 extend outward through the openings of the cavities 22 on the proximal end side of the connector 20. Therefore, the positions where the plurality of electric wires 30 extend from the base end side of the connector 20 are defined by the positions of the openings of the cavities 22. Usually, since the cavities 22 are formed side by side along the width direction of the connector 20, some of the plurality of electric wires 30 extend from a position from one side of the base end portion of the connector 20, and the plurality of electric wires 30. The other part extends from a position from the other side of the base end portion of the connector 20. For this reason, when the plurality of electric wires 30 are tightly bundled on the proximal end side of the connector 20, the electric wires 30 extending from the side portion of the proximal end portion of the connector 20 are strongly pressed against the opening of the cavity 22. In particular, when the connector 20 is wide, such a problem is likely to occur. The present embodiment relates to a technique for suppressing the electric wire 30 from being strongly pressed against the opening of the cavity 22 as described above.

  The covering portion 40 is formed by spirally winding the tape 41 so as to cover a portion extending from the connector 20 to the electric wire 30.

  The covering portion 40 plays a role of suppressing water from entering the connector 20 from the base end side of the connector 20.

  In addition, when the core wire and the terminal of the electric wire 30 are formed of different metals, the different metal contact corrosion is likely to occur at the connection portion. In order to avoid this, it is preferable that water does not adhere to the connecting portion between the core wire and the terminal. Therefore, the structure which covers the connection part of a core wire and a terminal by mold shaping | molding, application | coating of an anticorrosive, etc. is also considered. However, in that case, it is necessary to perform anticorrosion processing on the connection portion between each electric wire and the terminal, resulting in an increase in cost. Therefore, if the covering portion 40 is formed so as to cover the portion extending between the connector 20 and the electric wire 30, it is possible to suppress water intrusion at the base end side of the connector 20 at a low cost, and anti-corrosion measures can be taken at low cost. It becomes possible. Thus, when the core wire and the terminal of the electric wire 30 are formed of different metals, the configuration according to the present embodiment is effective as a configuration for performing anticorrosion. But the structure which concerns on this embodiment is applicable also when the core wire and terminal of the electric wire 30 are formed with the same kind of metal.

  Here, the covering portion 40 includes a first covering portion 42 that is spirally wound so that the tape 41 sequentially overlaps the outer peripheral side from the electric wire 30 toward the outer periphery of the base end portion of the connector 20, and the tape 41 is the connector. And a second covering portion 44 wound spirally so as to sequentially overlap the outer peripheral side from the outer periphery of the base end portion of the 20 toward the electric wire 30. The first covering portion 42 and the second covering portion 44 can be formed by continuously winding one tape 41. Here, the second covering portion 44 is provided on the outer peripheral side of the first covering portion 42, but the opposite, that is, the first covering portion 42 may be provided on the outer peripheral side of the second covering portion 44. . Moreover, the structure by which any one of the 1st coating | coated part 42 and the 2nd coating | coated part 44 was abbreviate | omitted may be sufficient as a coating | coated part.

  A method for manufacturing the connector-attached electric wire 10 will be described.

  First, as shown in FIG. 3, a connector in which a plurality of electric wires 30 extend to the proximal end side of the connector 20 is prepared. In the initial state, the plurality of electric wires 30 extend to the proximal end side of the connector 20 at positions corresponding to the openings of the cavities 22. In FIG. 3, a state in which the plurality of electric wires 30 extend in parallel from the base end portion of the connector 20 is illustrated.

  Next, as shown in FIG. 4, a plurality of electric wires 30 extending from the connector 20 are twisted (step (a)). Thereby, the plurality of electric wires 30 extending from the connector 20 are twisted and gathered at a position away from the connector 20. The plurality of electric wires 30 have a posture of extending toward the collective portion 38 while being straight or inclined from the opening of each cavity 22. In this state, the plurality of electric wires 30 that extend from the opening of the cavity 22 near the side of the connector 20 are directed to the collective portion while being inclined according to the position of the collective portion 38. At this time, by appropriately adjusting the twisting positions of the plurality of electric wires 30, the inclination angle of the electric wires 30 can be made as small as possible so that it is not bent as much as possible at the opening of the cavity 22. Therefore, it can be set as the state maintained in the inclination state which the electric wire 30 does not press against the opening of the cavity 22 strongly.

  Next, as shown in FIG. 4 and FIG. 5, the covering portion 40 is formed by spirally winding the tape 41 around the portion extending from the connector 20 to the electric wire 30 while keeping the plurality of electric wires 30 twisted. (Step (b)). Here, it is assumed that the tape 41 is spirally wound from the electric wire 30 toward the connector 20.

  In addition, it is preferable to perform the winding operation of the tape 41 in a state where the connector 20 and the gathering portion 38 are pulled away from each other. This is because the posture of the electric wire 30 can be further stabilized. However, since the wire 30 itself has a certain degree of strength that is difficult to bend, as described above, the posture of the wire 30 can be stabilized to some extent even if it is not in such a pulled state if the gathering portion 38 is fixed. It can be made. For this reason, it is not essential to perform the winding operation of the tape 41 in a state where the connector 20 and the collective portion 38 are pulled away from each other.

  Further, the tape 41 is spirally wound with the portion 38a closer to the connector 20 or the portion closer to the connector than the portion of the portion 38 gathered by twisting among the plurality of electric wires 30 as the starting position. Is preferred. FIG. 4 shows an example in which the portion 38 a is set at the position where the tape 41 starts to be wound. Thereby, the inclination angle (for example, angle α) of each electric wire 30 extending from the opening of each cavity 22 toward the collective portion 38 is kept as small as possible, and the electric wire 30 is pressed as strongly as possible into the opening of the cavity 22. It is possible to wind the tape 41 in a state where it is not possible.

  Here, assuming that the plurality of electric wires 30 are not twisted together, when winding the tape 41, the electric wire 30B (see the electric wire 30B indicated by a two-dot chain line in FIG. 4) uses the opening peripheral edge of the cavity 22 as a fulcrum. Can move freely. For this reason, the electric wire 30B may be largely inclined (for example, the angle β) due to a winding force when the tape 41 is wound, an operator's unintended contact with the electric wire 30, and the like. In this state, when the winding operation of the tape 41 is performed, the electric wire 30B is fixed by the tape 41 in a state where the electric wire 30B is greatly inclined, and the electric wire 30B may be maintained in a state of being strongly pressed against the opening of the cavity 22. Conceivable.

  On the other hand, when the plurality of electric wires 30 are twisted and assembled as described above, the state (inclined state) of the portion of the plurality of electric wires 30 from the connector 20 toward the assembly portion 38 is stabilized. For this reason, even if the tape 41 is wound around the portion, the electric wire 30 is not easily inclined, and a situation in which the electric wire 30 is strongly pressed against the opening of the cavity 22 is unlikely to occur.

  Thereafter, when the tape 41 is wound spirally from the connector 20 toward the electric wire 30, the covering portion 40 can be formed.

  In addition, as a tape, the adhesive tape in which the adhesion layer was formed in the one main surface of the strip | belt-shaped base material formed with resin etc. can be used. However, in consideration of the step (c) described below, as the tape 41, as shown in FIGS. 6 and 7, an adhesive layer 41b is formed only on a portion from one side of one main surface of the belt-like base material 41a. It is preferable to use those prepared. The adhesive layer 41b is formed in a 1/3 to 2/3 portion, preferably a half portion, in the width direction of the base material 41a. Then, the tape 41 is wound while the adhesive layer 41 b adheres the surrounding layers of the tape 41. That is, the tape 41 is wound spirally while being overlapped so that the adhesive layer 41b of the next layer tape 41 overlaps and adheres to the outer surface of the base material 41a of the front layer tape 41. Thereby, the state by which the tape 41 was wound helically is maintained. Further, in the inner peripheral portion where the tape 41 is spirally wound, that is, the inner peripheral portion of the covering portion 40, a portion of the base 41a of the tape 41 on which the adhesive layer 41b is not formed is mainly exposed. doing. For this reason, the some electric wire 30 will be in the state which can move comparatively freely on the inner peripheral side of the coating | coated part 40. FIG.

  When the configuration in which the tape 41 is spirally wound while overlapping from the electric wire 30 toward the connector 20 side is observed in a cross section along the extending direction of the electric wire 30, as shown in FIG. Each winding layer portion is continuous from the outer peripheral portion of the base end portion of the connector 20 toward the outer peripheral portion at a position away from the base end portion of the connector 20 in the bundle of electric wires 30. Further, when observing the mutual relationship between the respective winding layer portions of the tape 41, the winding layer portion close to the connector 20 partially overlaps the outer peripheral side with respect to the winding layer portion farther from the connector 20 than this. For this reason, even if a gap is generated between the respective wound layer portions of the tape 41, the gap is opened on the side away from the connector 20. For this reason, when the water flowing from the connector 20 to the electric wire 30 side is observed, the water hardly penetrates into the inside through the gap between the winding layer portions, and smoothly flows to the electric wire 30 side along the surface of each winding layer portion. Go. For this reason, the electric wire with connector 10 can easily infiltrate water from the proximal end side of the connector 20 when the connector 10 is disposed in a horizontal posture or in an inclined or vertical posture with the connector 20 facing upward from the horizontal posture. It can be effectively suppressed.

  After the step (b), as shown in FIG. 8, the twisted wires 30 are twisted back (step (c)). At this time, the portion where the tape 41 is adhered to the plurality of electric wires 30 is partial, and the inner peripheral portion of the covering portion 40 is not adhered to the plurality of electric wires 30 so much. Even if it exists in the coating | coated part 40, it can be twisted back easily.

  The step (c) is not essential, and the plurality of twisted electric wires 30 may be maintained as they are (see FIG. 5), and this may be used as the electric wire 10 with a connector.

  As described above, according to the method of manufacturing the electric wire with connector 10 and the electric wire with connector according to the present embodiment, the tape 41 is wound in a state in which a plurality of electric wires 30 are twisted to maintain a somewhat stable posture. For this reason, the winding force or the like of the tape 41 is unlikely to act as a force that presses the electric wire 30 against the peripheral edge of the opening of the cavity 22 of the connector 20 with a large force. Thereby, it can suppress that the electric wire extended to the base end side of the connector 20 is pressed against the opening peripheral part of the cavity 22 with big force.

  Further, since the plurality of wires 30 are twisted and gathered at a position away from the connector 20, the wires 30 extend toward the proximal end side of the connector 20 and are gently inclined. For this reason, the electric wire 30 extending to the proximal end side of the connector 20 is less likely to be pressed with a large force against the peripheral edge of the opening of the cavity 22 of the connector 20.

  Of the plurality of wires 30 twisted and assembled, the portion 38a closer to the connector 20 or the portion closer to the connector 20 than the portion 38a starts to be wound, and the tape 41 is directed toward the proximal end of the connector 20 If they are wound in a spiral shape, it is difficult for the plurality of electric wires 30 to be tightly bound. For this reason, the electric wire 30 extending to the proximal end side of the connector 20 is hardly pressed against the opening peripheral edge portion of the cavity 22 of the connector 20 with a large force.

  Moreover, if the some electric wire 30 is twisted back, the some electric wire 30 will come to extend as straight as possible from the connector 20. FIG. Thereby, the length of the electric wire 30 can be effectively utilized and disposed along the wiring path, and the length of the electric wire 30 can be shortened as much as possible.

  Note that when the tape 41 is spirally wound from the electric wire 30 toward the connector 20, the force for binding the plurality of electric wires 30 tends to increase at a portion close to the connector 20. Therefore, it is effective to employ the above-described configuration when the tape 41 is spirally wound from the electric wire 30 toward the connector 20.

  However, as shown in FIG. 9, when the tape 41 is spirally wound from the connector 20 toward the electric wire 30, the tape 41 comes off the outer periphery of the base end portion of the connector 20 and moves toward the electric wire 30 side. When wound, there is a risk that the wires 30 will be tightly bound. Even in such a case, by twisting the plurality of electric wires 30, the posture (inclination) of the electric wires 30 extending from the connector 20 is maintained in a stable state. It becomes difficult to be strongly pressed against the part.

  As described above, the present invention has been described in detail. However, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Electric wire with connector 20 Connector 22 Cavity 30 Electric wire 38 Gathering part 40 Cover part 41 Tape 41a Base material 41b Adhesive layer 42 1st coating part 44 2nd coating part

Claims (7)

(a) a step of twisting a plurality of electric wires extending from the connector;
(b) While maintaining the twisted state of the plurality of electric wires, a step of forming a covering portion by spirally winding a tape around a portion extending from the connector to the electric wires;
The manufacturing method of the electric wire with a connector provided with. It is a manufacturing method of the electric wire with a connector according to claim 1,
In the step (a), a method of manufacturing an electric wire with a connector, wherein the plurality of electric wires are twisted and assembled at a position away from the connector. It is a manufacturing method of the electric wire with a connector according to claim 2,
In the step (b), starting from winding the portion near the connector or the portion closer to the connector than the portion of the twisted and gathered portion of the plurality of electric wires, the tape at the base end of the connector A method of manufacturing an electric wire with a connector that is spirally wound toward the connector. It is a manufacturing method of the electric wire with a connector according to claim 2,
In the step (b), a method of manufacturing an electric wire with a connector, wherein the tape is spirally wound from a proximal end portion of the connector toward the electric wire. It is a manufacturing method of the electric wire with a connector given in any 1 paragraph of Claims 1-4,
(c) A method of manufacturing an electric wire with connector, further comprising a step of twisting back the twisted electric wires after the step (b). It is a manufacturing method of the electric wire with a connector according to claim 5,
In the step (b), as the tape, an adhesive layer is formed only on a part from one side of one main surface of the belt-shaped base material, and the circulation layer of the tape is adhered by the adhesive layer. The manufacturing method of the electric wire with a connector which winds the said tape. A connector;
A plurality of wires that extend and extend to the proximal end side of the connector; and
A covering formed by a tape being spirally wound around a portion extending from the connector to the electric wire;
An electric wire with a connector.

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