JP2015072847A - Splice structure for electric wires - Google Patents

Abstract

PROBLEM TO BE SOLVED: To downsize a splice connector using a chain terminal.SOLUTION: A plurality of crimp terminal parts are protrusively provided on a band-like coupling plate part at an interval. Each crimp terminal part uses a chain terminal comprising at least one core wire barrel. An exposed core wire of each one electric wire is caulked and crimped at each core wire barrel of the plurality of crimp terminal parts. The band-like coupling plate part that is flat at a crimping work is bent in a U-shape after crimping to make the plurality of crimp terminal parts be opposed to each other. An insulation tape or an insulation sheet is wound around in this state to coat the chain terminal and the whole of a connection part of the electric wire caulked and crimped to the chain terminal.

Description

  The present invention relates to an electric wire splice structure, and more particularly, to improve the splice structure for connecting a plurality of electric wires to a chain terminal.

  As a terminal fitting for splicing (joint connection) a plurality of electric wires of this type, Japanese Patent Application Laid-Open No. 2006-108051 discloses a chain-like terminal fitting 100 for a joint connector shown in FIGS. 9 (A) to (C). Is provided. The terminal fitting 100 is composed of a chain terminal provided with a plurality of terminal fittings 101 connected at intervals by a connecting portion 102, and each terminal fitting 101 includes at least three wire barrels (core barrels) 103a to 103c having different sizes. Four barrels of one insulation barrel (insulation coating barrel) 104 are provided adjacent to the substrate portion 105.

Three wire barrels provided in each terminal fitting 101 of the chain-like terminal fitting 100 are a small wire barrel 103a for thin wire, a medium wire barrel 103b for medium wire, and a large wire barrel 103c for thick wire. It consists of. As shown in FIG. 9B, when crimping with the electric wire 200 (200A to 200C), the core wire is caulked with a wire barrel corresponding to the diameter of the electric wire, and in the case of the thin electric wire 200A, the small wire barrel 103a is caulked. The other medium-sized wire barrel 103b and the large-sized wire barrel 103c are not crimped and remain protruding from both sides in the width direction of the substrate portion 105. One wire barrel that fits each of the middle wire 200B and the thick wire 200C is crimped, and the remaining two wire barrels are not crimped and remain protruding from both sides in the width direction.
Further, the electric wire 200 crimped to the terminal fitting 100 is accommodated in the joint connector 110 as shown in FIG. 9C.

JP 2006-108051 A

  The chain-like terminal fitting 100 of Patent Document 1 has a large length because each of the plurality of terminal fittings 101 arranged in parallel at intervals in the connecting portion 102 includes at least three wire barrels and one insulation barrel. And, since the two wire barrels of the three wire barrels including the large wire barrel are not crimped and remain in the protruding state, the height is also increased. Therefore, the large-sized joint connector 110 to be inserted in a state where a plurality of electric wires are crimped and connected to the chain-like terminal fitting 100 is required, and there is a problem that installation space is required. Therefore, when splicing the branch lines branching from the trunk line of the wire harness with the chained terminal fittings and mounting the joint connector for housing the chained terminal fittings on the trunk line of the wire harness, It may occur when there is no installation space because it is a joint connector.

  Furthermore, the direction of the wires to be connected is the same for each terminal fitting 101 of the chain-like terminal fitting 100, but there is a problem that cannot be applied when the wires to be spliced are in different directions. is there.

  The present invention has been made in view of the above-described problem, and does not require a large joint connector in a state in which a plurality of electric wires are spliced using a chain-shaped terminal fitting, and wires in different directions are chained together. It is an object of the present invention to enable splice connection using a shaped terminal fitting.

  In order to solve the above-mentioned problem, as a first invention, a plurality of crimp terminal portions project from the strip-shaped connecting plate portion with a space therebetween, and each crimp terminal portion uses a chain terminal provided with at least one core wire barrel, The exposed core wires of each of the crimp terminal portions are crimped and crimped by the core wire barrels of the plurality of crimp terminal portions, and the strip-like connecting plate portion that has been flattened during the crimping operation is bent into a U shape after being crimped. In this state, the crimping terminal portions are in a state of facing each other, and in this state, the insulating tape or the insulating sheet is wound to cover the chain terminal and the entire connecting portion of the electric wire crimped to the chain terminal. The electric wire splice structure is provided.

  As described above, by crimping and crimping each wire to each crimp terminal portion of the chain terminal and then bending the strip-shaped connecting plate portion so that the crimp terminal portions face each other, the whole can be reduced in size. In addition, when the insulation tape or insulation sheet is wrapped around the entire crimp terminal part of the miniaturized chain terminal and covered, the joint connector that accommodates the chain terminal can be dispensed with, and further miniaturization can be achieved. It can be installed and cost can be reduced.

  Further, when the belt-like connecting plate portions between the adjacent crimp terminal portions are folded and overlapped and narrowed between the adjacent crimp terminal portions and then bent into a U shape as described above, a splice connection portion is further formed. Can be miniaturized.

Moreover, as 2nd invention, the crimp terminal part protrudes at intervals in a strip | belt-shaped connection board part, and each crimp terminal part uses the chain terminal provided with the at least 1 core wire barrel,
The crimped terminal portion in which the exposed core wires of each one of the plurality of crimp terminal portions are in the same direction are crimped and connected with the core wire barrel, and the required wires are crimped and crimped at the time of the crimping. The electric wire splice structure is characterized in that the electric wire direction is opposite to the direction of other electric wires by reversing.

  As mentioned above, when crimping a wire to each crimp terminal part of the chain terminal, arrange the wires in the same direction and crimp them, then reverse the crimp terminal part that needs to reverse the wire direction I am letting. Thereby, it can arrange | position in the required direction from which the direction of the some electric wire which carries out splice connection using a chain terminal differs.

In the first and second inventions, each crimp terminal portion preferably has a shape in which one core wire barrel is provided and one insulating coating barrel is provided between the core wire barrel and the strip-shaped connecting plate portion. .
In addition, it is good also as a shape which provided only one comparatively long core wire barrel, without providing the said insulation coating barrel in each crimp terminal part. When only one core wire barrel is provided in this way, the wire in which the direction of the electric wire is reversed may be arranged on the crimp terminal portion from the reverse direction, and the core wire barrel may be crimped and crimped. And there is no need to reverse the wires.

As 3rd invention, while providing a crimp terminal part protrudingly at intervals in a strip | belt-shaped connection board part, each crimp terminal part provides two 1st, 2nd insulation coating barrels to a board | substrate part on both sides of a length direction, , Using a chain terminal having one core wire barrel between the first and second insulation coating barrels,
A plurality of crimp terminals are each provided with an exposed core wire, and some of the wires are arranged on the side of the belt-like connecting plate, and the wires are connected to the first insulation coating barrel and the core wire. While connecting with the barrel by crimping, the other wires are arranged in the opposite direction to the strip-shaped connecting plate side, and crimped and connected with the second insulation coating barrel and the core wire barrel. An electric wire splice structure is provided in which the direction of the electric wire to be connected is reversed.

  As described above, each crimp terminal portion is provided with two insulation coating barrels composed of the first and second insulation coating barrels, and one core wire barrel is provided between them. Caulking and crimping can be performed with two insulating coating barrels and a core wire barrel, and there is no need to reverse after crimping.

In any of the first to third inventions, the wire to be crimped and crimped at the crimp terminal portion of the chain terminal is previously exposed by stripping the insulation coating layer of the wire terminal to expose the core wire. By simply setting the core wire to the crimp terminal portion of the chain terminal and crimping it, the required number of wires are spliced.
In addition, after a plurality of electric wires are crimped and connected to one chain terminal, the strip-shaped connecting plate portion can be cut to divide the connecting portion in which the required wires are spliced into a plurality of pieces.

In the present invention, the splicing connection of a plurality of electric wires can be easily performed using the chain terminal, and the strip-like connecting plate portion of the chain terminal in which the plurality of electric wires are spliced can be bent to reduce the length, and U It can be reduced in size by bending in a letter shape and overlapping the wire crimping portions facing each other. Since it is miniaturized in this way, it can be wound and insulated so as to cover the whole with an insulating resin sheet. Therefore, since it can protect even if it does not accommodate in a joint connector in the state which carried out the splice connection of the electric wire with the chain terminal, the local enlargement of a wire harness can be prevented and a significant cost reduction can be aimed at.
Further, even when the direction of the wire to be spliced is different, the splice connection can be easily performed using the chain terminal.

The chain terminal of 1st Embodiment of this invention is shown, (A) is a partially expanded plan view, (B) is a perspective view, (C) is a top view of the one chain terminal cut | disconnected. It is drawing which shows the electric wire connected by crimping. The state which connected the one electric wire with the crimp terminal part of a chain terminal is shown, (A) is a front view, (B) is a perspective view. (A)-(H) are drawings which show the process of connecting an electric wire to a chain terminal. (A) (B) is drawing which shows the example of a cutting | disconnection of the strip | belt-shaped connection board part of a chain terminal. It is a top view which shows 2nd Embodiment. It is a top view which shows 3rd Embodiment. It is a top view which shows 4th Embodiment. (A)-(C) are drawings which show a prior art example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In any of the embodiments, a plurality of electric wires constituting a wire harness routed in an automobile are spliced using a chain terminal fitting 1 (hereinafter abbreviated as chain terminal 1).

1 to 5 show a first embodiment.
As shown in FIG. 1, a chain terminal 1 is provided by punching a conductive metal plate and then bending it. The chain terminal 1 has a crimp terminal portion 3 protruding from one end edge in the width direction of the strip-shaped connecting plate portion 2 at a certain distance in the length direction to crimp and connect each one wire terminal. Cut the strip-like connecting plate portion 2 at a position where the number of the crimping terminal portions 3 corresponds to the number of wires spliced to the chain terminal 1 projecting a large number of the crimping terminal portions 3 on one strip-like connecting plate portion 2. Used. In the present embodiment, four chain terminal portions 3 are connected to one chain terminal 1 by a strip-shaped connecting plate portion 2.

  Each crimp terminal portion 3 has a terminal substrate portion 31 protruding from the strip-shaped connecting plate portion 2 via the connecting portion 30, and the connecting portion 30 and the terminal substrate portion 31 are formed of a continuous narrow plate. One core barrel 32 (32a and 32b) is provided on the front end side of the terminal board 31 so as to be opposed from both sides in the width direction. Further, one insulating coating barrel 33 (33a, 33b) is provided so as to protrude from both ends in the width direction from the position to the connecting end of the connecting portion 30 with a space from the core wire barrel 32.

The band-shaped connecting plate portion 2 is also referred to as a carrier because it becomes a transport portion at the time of creation, and a pin hole 2h for inserting a transport pin is provided at a position corresponding to the protruding position of each crimp terminal portion 3.
The pitch P of the crimp terminal portion 3 projecting from the belt-like connecting plate portion 2 is set to a dimension that can secure a space for crimping the electric wire, the core wire barrel 32 and the insulation coating barrel 33 with a crimping device.

  An electric wire 10 to be crimped and crimped to the crimp terminal portion 3 of the chain terminal 1 is a general-purpose covered round electric wire in which a core wire 11 made of a large number of conductive wires is covered with an insulating coating layer 12 as shown in FIG. Become. The insulation coating layer 12 is peeled to the required dimensions on the terminal side of the electric wire 10, and the core wire 11 is exposed from the cut end 12 c of the insulation coating layer 12.

  As shown in FIG. 3, the wire 10 is caulked and crimped by the core wire barrel 32 of each crimp terminal portion 3 of the chain terminal 1 and the insulation coating layer 12 is caulked and crimped by the insulation coating barrel 33. doing. Each electric wire 10 connected to each crimp terminal portion 3 is spliced to each other by being electrically connected by the strip-like connecting plate portion 2.

Next, a process for forming an electric wire splice structure using the chain terminal 1 will be described with reference to FIG.
As shown in FIG. 4 (A), the tip end side where the core wire 11 of each electric wire 10 is exposed is inserted in the direction of the arrow from the belt-like connecting plate portion 2 side of the chain terminal 1 to each crimp terminal portion 3 and exposed. The core wire 11 is set on the terminal substrate portion 31 between the core wire crimping barrels 32, and the leading end side of the insulating coating layer 12 is set between the insulating coating barrels 33.

  As shown in FIG. 4B, the core wire barrels 32a and 32b are caulked and crimped from both sides of the core wire 11 with a crimping device (not shown) in the above state, and the insulation coating barrels 33a and 33b are caulked from both sides of the insulation coating 12. Crimp.

  In this embodiment, since the chain terminal 1 has the four crimp terminal portions 3, the four electric wires 10 are conducted through the strip-like connecting plate portion 2, and the four electric wires are spliced. In this way, when it is sufficient to connect the four electric wires 10, both ends in the length direction of the band-shaped connecting plate portion 2 are edges, so that both ends are rounded as shown in FIG. Cut to be R and perform edge processing.

  Next, as shown in FIGS. 4D and 4E, the band-shaped connecting plate portion 2 having a pitch P between the adjacent crimp terminal portions 3 of the chain terminal 1 is bent, and the adjacent crimp terminal portions 3 are bent by the bent portion 2x. Is shortened to about 1/2 P pitch. In addition, since it bends in a U-shape in a subsequent process, the band-shaped connecting plate portion 2s at the center in the length direction of the band-shaped connecting plate portion 2 shown in FIG.

  Thereafter, from the state in which the plurality of crimp terminal portions 3 of the chain terminal 1 are arranged in parallel in a flat manner, the belt-like connecting plate portion 2 is bent into a U-shape as shown in FIG. The crimped terminal portions 3 are stacked with the two right and left facing each other, and are reduced in size into a lump shape.

  Next, as shown in FIGS. 4G and 4H, the insulating resin sheet 20 made of a urethane sheet, PVC tape, or the like is wound around the whole of the spliced connection portion of the four electric wires that are miniaturized in a U shape. Insulate.

  In this state, when the four electric wires 10 spliced to connect are branch lines branched from the main line of a wire harness (not shown), the splice connection portion insulated by the insulating resin sheet 20 is placed on the main line. Mount and fix with adhesive tape.

  As described in the above embodiment, the splicing connection of the plurality of electric wires 10 can be easily performed at the same time, and the strip-like connecting plate portion 2 of the chain terminal 1 to which the plurality of electric wires 10 are spliced is bent to shorten the chain state. At the same time, it is bent in a U-shape and the electric wire crimping portions are overlapped in a facing state to reduce the size. Since it is miniaturized in this way, the insulation resin sheet 20 can be wound to cover the entire surface and insulated. Therefore, since it can protect even if it does not accommodate in a joint connector in the state which spliced the electric wire 10 with the chain terminal 1, it can aim at a significant cost reduction.

  For example, when three wires are spliced to each other without splicing the wires 10 to be spliced with the chain terminal 1, as shown in FIG. 5 (A), the crimp terminals are not cut. After each wire 10 is crimped to each of the portions 3, the strip-like connecting plate portion 2 is cut as shown in FIG. 5B, and the three crimp terminal portions 3 are chained to form a splice connection portion. ing.

FIG. 6 shows a second embodiment.
In the second embodiment, among a plurality (three in this embodiment) of wires 10A, 10B, and 10C that are crimp-connected to the crimp terminal portion 3 of one chain terminal 1, the wires 10A and 10B are wired from the same direction. The electric wire 10C is wired from the reverse direction.
In this case, in the same manner as in the first embodiment, the three electric wires 10A to 10C are inserted in the same direction in the three crimp terminal portions 3 of the chain terminal 1, and are inserted into the crimp terminal portion 3 from the belt-like connecting plate portion 2 side. And crimp.
Thereafter, the crimp terminal portion 3-B crimped to the electric wire 10B is bent so as to be reversed from the boundary position between the connecting portion 30 and the strip-like connecting plate portion 2, and the direction of the electric wire 10B is reversed to the direction of the electric wires 10A and 10C. To do.
Thus, even if the crimp terminal portion 3 is bent and inverted, the strip-shaped connecting plate portion 2 is electrically connected to the other crimp terminal portion 3 that is not inverted, so that the splice connection state can be maintained.
Since other configurations are the same as those of the first embodiment, description thereof is omitted.

FIG. 7 shows a third embodiment.
In the third embodiment, when the shape of each crimp terminal provided on the chain terminal 1-3 is different from that of the first and second embodiments, and the plurality of electric wire directions to be spliced as in the second embodiment are different, An electric wire can be made into a different direction, without reversing a crimp terminal part.

The chain terminal 1-3 is the same as the first embodiment in that the crimp terminal portion 3-1 protrudes from the belt-like connecting plate portion 2 with an interval.
Each crimp terminal portion 3-1 is provided with two first and second insulation coating barrels 40 (40 a and 40 b) and 41 (41 a and 41 b) on both sides in the length direction on the terminal substrate portion 31, and the first One core wire barrel 32 (32a and 32b) is provided between the second insulation coating barrels 40 and 41.

  Of the three crimp terminal portions 3-1 of the chain terminal 1-3, the two electric wires 10A and 10C are inserted into the crimp terminal portions 3-1 on both sides from the strip-shaped connecting plate portion 2 side and exposed. The set core wire 11 is set between the core wire barrels 32 at the center, and the insulating coating layer 12 on the peeled end side is set between the insulating coating barrels 401 on the strip-like connecting plate portion 2 side. On the other hand, the electric wire 10B is inserted from the opposite direction, the exposed core wire 11 is set between the central core wire barrels 32, and the insulation coating layer 12 on the peeled end side is set between the insulation coating barrels 41 on the front end side. .

In this state, the three crimp terminal portions 3-1 are simultaneously crimped by a crimping device. Thereby, the core wire and insulation coating layer of the three electric wires 10A to 10C in different directions can be crimped together. At that time, one insulation coating barrel is not crimped to the electric wire in each crimp terminal portion 3-1, but it is only crimped and folded.
Since other configurations are the same as those of the first embodiment, description thereof is omitted.

FIG. 8 shows a fourth embodiment.
In the fourth embodiment, the shape of each crimp terminal portion of the chain terminal 1-4 is also different.
That is, in each crimp terminal portion 3-2 of the chain terminal 1-4, only one core wire barrel 50 protrudes from both sides in the width direction of the terminal substrate portion 31 continuously to the connecting portion 30. The core wire barrel 50 is longer than the core wire barrel 32 of the first to third embodiments.
Since the configuration including the crimping with the electric wire is the same as that of the first embodiment, the description thereof is omitted.
When the chain terminal of the fourth embodiment is used, only the core wire barrel and no insulation coating barrel are provided, so that the electric wire can be set from the opposite direction and crimped.

DESCRIPTION OF SYMBOLS 1 Chain terminal 2 Band-shaped connection board part 3 Crimp terminal part 10 Electric wire 11 Core wire 12 Insulation coating layer 20 Insulating resin sheet 30 Connection part 31 Terminal board part 32 Core wire barrel 33 Insulation coating barrel

Claims (5)

A plurality of crimp terminal portions projecting at intervals from the band-shaped connecting plate portion, and each crimp terminal portion uses a chain terminal provided with at least one core wire barrel,
The exposed core wires of each of the crimp terminal portions are crimped and crimped by the core wire barrels of the plurality of crimp terminal portions, and the strip-like connecting plate portion that has been flattened during the crimping operation is bent into a U shape after being crimped. In this state, the crimping terminal portions are in a state of facing each other, and in this state, the insulating tape or the insulating sheet is wound to cover the chain terminal and the entire connecting portion of the electric wire crimped to the chain terminal. Characteristic splice structure of electric wire.   The splice structure for an electric wire according to claim 1, wherein the band-shaped connecting plate portions between the adjacent crimp terminal portions are folded and overlapped to narrow the space between the adjacent crimp terminal portions. Crimp terminal portions projecting at intervals from the strip-shaped connecting plate portion, each crimp terminal portion using a chain terminal provided with at least one core wire barrel,
The exposed core wire of each wire in the same direction is connected to a plurality of crimp terminal portions by caulking and crimping with the core wire barrel, and the crimp terminal portion obtained by caulking and crimping a required electric wire at the time of the crimping is connected. An electric wire splice structure in which the direction of the electric wire is reversed so that the direction of the electric wire is opposite to the direction of the other electric wires.   4. The device according to claim 1, wherein each crimp terminal portion of the chain terminal is provided with one core wire barrel and one insulating coating barrel between the core wire barrel and the belt-like connecting plate portion. The wire splice structure described in 1. Crimp terminal portions project from the strip-shaped connecting plate portion with an interval, and each of the crimp terminal portions is provided with two first and second insulation coating barrels on both sides in the length direction of the substrate portion. Using a chain terminal with one core barrel between two insulation-coated barrels,
A plurality of crimp terminals are each provided with an exposed core wire, and some of the wires are arranged on the side of the belt-like connecting plate, and the wires are connected to the first insulation coating barrel and the core wire. While connecting with the barrel by crimping, the other wires are arranged in the opposite direction to the strip-shaped connecting plate side, and crimped and connected with the second insulation coating barrel and the core wire barrel. An electric wire splice structure in which the direction of the electric wire to be connected is reversed.

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