JP2015097142A - Intermediate crimp terminal and splice structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intermediate crimp terminal capable of splicing extra fine electric wires and different kinds of electric wires.SOLUTION: An intermediate crimp terminal includes two right and left crimp terminals for one electric wire having a U-shaped core wire barrel on the tip side of a substrate made of a conductive metal plate and having a U-shaped insulation coating barrel with a space. Two right and left crimp terminals are integrally provided in a coupling part projecting from the base end sides of the insulation coating barrels. The core wire barrel of each crimp terminal is arranged to have a dimension capable of caulking and crimping a fine electric wire whose core wire cross sectional area is 0.13 mmor more.

Description

  The present invention relates to an intermediate crimp terminal and a splice structure using the intermediate crimp terminal, and is particularly suitable for use in an intermediate splice for extra fine wires and an intermediate splice for different types of wires.

  Conventionally, when two electric wires are spliced, as shown in FIG. 4, the insulation coating W1-b is peeled off in the middle of the length direction of one electric wire W1 and the end of another electric wire W2 In many cases, the insulation coating W2-b is peeled off and crimped by an intermediate crimping terminal 300 having the exposed core wires W1-a and W2-a having a U-shaped cross section. (Refer to the conventional example of JP-A-11-233168)

  Also, as a terminal fitting for splicing (joint connection) a plurality of electric wires, Japanese Patent Application Laid-Open No. 2006-108051 provides a chain terminal fitting 100 for a joint connector shown in FIGS. 5 (A) to (C). Has been. 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. 5B, when crimping with the electric wire 200 (200A to 200C), the core wire is crimped and crimped with a wire barrel according to the diameter of the electric wire, and in the case of the thin electric wire 200A, a small wire barrel 103a is added. The other medium-sized wire barrels 103b and the large-sized wire barrels 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.
The electric wire 200 crimped to the terminal fitting 100 is accommodated in the joint connector 110 as shown in FIG.

JP-A-8-288029 JP 2006-108051 A

When the general-purpose U-shaped intermediate crimp terminal 300 shown in FIG. 4 is used, when different types of electric wires such as copper wires and aluminum wires are crimped and crimped with one intermediate crimp terminal, the compression ratios are different, so that they are crimped together. There is a problem that cannot be done. In addition, ultra-fine wires with a core wire cross-sectional area of about 0.13 mm ² have been used recently, but a crimp terminal that is crimped to a single wire terminal that has been conventionally provided has a minimum core wire cross-sectional area of 0.35 mm. ² and the size of the intermediate crimp terminal that binds and crimps the core wires of a plurality of electric wires further increases. Therefore, even if an ultrafine electric wire having a core wire cross-sectional area of about 0.13 mm ² is crimped using a conventional intermediate crimp terminal, it cannot be securely crimped to the core wire, and there is a problem in terms of electrical connection reliability.

Further, even when the chain-like terminal fitting 100 of FIG. 5 is used, the small wire barrel 103a for a thin wire is described in paragraph 0011 as for a thin wire of 0.3 to 0.5 sq (mm ² ). Therefore, it is not suitable for crimping the 0.13 mm ² extra fine wire.

  Furthermore, the chain-like terminal fitting 100 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. In addition, two of the three wire barrels including the large wire barrel are not crimped and remain in the protruding state, and thus the height is also large. 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 of the wire harness with the chained terminal fittings and mounting a joint connector that accommodates the chained terminal fittings on the trunk of the wire harness, It may occur when there is no installation space because it is a joint connector.

  Further, in many cases, two electric wires are spliced, but since the chain-like terminal fitting 100 of FIG. 5 has one terminal fitting 101 arranged in parallel with a gap at the connecting portion 102, the connecting portion 102 is Need to cut. Since the connecting portion 102 is a portion that becomes a carrier portion that is intermittently conveyed during processing, the connecting portion 102 is relatively wide and rigid. The connecting portion 102 needs to be cut by a cutting device provided with a cutting blade, and there is a problem that an operator cannot easily cut.

  The present invention has been made in view of the above problems. An intermediate crimp terminal that can be used for splicing of two electric wires that can be spliced and connected with the largest number of electric wires to be spliced, and the intermediate crimp terminal are provided. It is an object to provide a used splice structure.

In order to solve the above-mentioned problems, as a first invention, a crimping for a single electric wire having a U-shaped core wire barrel at the front end side of a substrate made of a conductive metal plate and having a U-shaped insulating coating barrel at an interval is provided. Two left and right terminal portions are provided, and the two right and left crimp terminal portions are integrally provided at a connecting portion protruding from the base end side of the insulating coating barrel,
The core wire barrel of each of the crimp terminal portions is provided with an intermediate crimp terminal characterized in that the core wire cross-sectional area has a dimension capable of crimping and crimping an ultrafine wire having a core wire cross-sectional area of 0.13 mm ² or more.

  As described above, the intermediate crimping terminal of the present invention is not crimped by crimping two wires to be connected in a conventional barrel and crimped by crimping two wires one by one. Two right and left terminal crimping portions are connected by a connecting portion to be electrically connected.

  The electric wire to be crimped and crimped at each of the crimp terminals is an insulating coating at an intermediate position or a terminal position of an electric wire in which a core wire is exposed by peeling off the insulating coating at an intermediate position of one electric wire. It is the electric wire which peeled and exposed the core wire.

Moreover, the electric wire crimped and crimped at each of the crimp terminal portions is a different type of copper-type electric wire and an aluminum-type electric wire, or / and an ultrafine electric wire having a core wire cross-sectional area of 0.13 mm ² or more and 0.35 mm ² or less.
As mentioned above, when different types of copper-type electric wires and aluminum-type electric wires are crimped in one barrel, the compression rate is different, so by crimping and crimping with separate crimp terminal parts, copper-type electric wires and aluminum-type electric wires Can be spliced with an intermediate crimp terminal.

In addition, even for splices of copper-type electric wires or aluminum-type electric wires, the reliability of crimping with a barrel crimped with a conventional crimping terminal is used for ultra-fine wires with a core wire cross-sectional area of 0.35 mm ² or less. There is a low problem. On the other hand, in the present invention, the size of each crimp terminal portion is 0.35 mm ² or less, and the size of the core wire of 0.13 mm ² of the smallest ultra-fine wire currently used can be reliably crimped. Electric wires can be spliced with intermediate crimp terminals.
Therefore, for example, a copper-based electric wire and an aluminum-based electric wire having a core wire cross-sectional area of 0.13 mm ² can be spliced with the intermediate crimping terminal of the present invention.

The connecting portion for connecting the two right and left crimp terminal portions is formed in a semi-annular shape, and both ends are connected to the base end of the substrate that is the center of the insulating coating barrel of the two left and right crimp terminal portions,
The semi-annular central apex portion is connected to one end edge of the carrier portion, and the connecting portion is provided in the carrier portion with an interval, and the connecting portion and the carrier portion of the connecting portion are provided. The boundary portion is cut to form the intermediate crimp terminal.

Furthermore, the present invention provides a splice structure in which an electric wire is spliced using the intermediate crimp terminal.
In addition, it is preferable that a waterproof sheet is wound around the intermediate crimp terminal in a state where the electric wire is crimped and connected to be insulated and protected. With this configuration, the size can be reduced, and waterproof protection can be easily achieved.

As described above, when the intermediate crimping terminal of the present invention is used, the core wire barrel width is reduced, so that it is possible to intermediately connect extra fine wires of about 0.13 mm ² . Moreover, since the core wire of each electric wire is crimped and crimped by the core wire barrel of another crimp terminal portion to change the compression rate, the copper-based electric wire and the aluminum-based electric wire can be connected. Further, since the intermediate connection portion can be reduced in size, there is an advantage that the mounting space is not troubled.

1A and 1B show a first embodiment of the present invention, in which FIG. 1A is a plan view showing an electric wire to be spliced with an intermediate crimping terminal, and FIG. (A) is a top view of the chain-shaped component which has provided the intermediate | middle crimp terminal continuously, (B) is a principal part enlarged view. It is drawing which shows the state which mounted the splice part connected with the intermediate crimp terminal of this invention in the wire harness. It is drawing which shows a prior art example. (A)-(C) are drawings which show another prior art example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, two electric wires 1 and 2 to be wired to an automobile are spliced using an intermediate crimp terminal 3. Specifically, the intermediate portion in the length direction of the electric wire 1 and the end of the electric wire 2 are spliced.

The electric wire 1 is a copper-based electric wire in which a core wire 1a formed by twisting an element wire made of a copper-based metal wire is covered with an insulating coating layer 1b made of an insulating resin. The electric wire 1 is a very thin electric wire having a cross-sectional area of a core wire 1a of 0.13 mm ² , and an insulating coating layer 1b is peeled off at an intermediate portion in the length direction.
The other electric wire 2 is an aluminum electric wire in which a core wire 2a formed by twisting a strand made of an aluminum metal wire is covered with an insulating coating layer 2b made of an insulating resin. Electrical wire 2 is the cross-sectional area of the core 2a is made of fine wire of 0.35 mm ^2, are stripped skin of insulation layer 2b on one terminal length.

As shown in FIG. 2, the intermediate crimp terminal 3 is formed by dividing and cutting a chain-like component 4 provided by punching a conductive metal plate and then bending it.
The intermediate crimp terminal 3 has a U-shaped core wire barrel 6 on the front end side of a substrate 5 made of a copper-based metal plate, and has a U-shaped insulating coating barrel 7 with a gap therebetween, and a single-wire crimp terminal 10 ( 10A and 10B), and the two right and left crimp terminal portions 10A and 10B are integrally connected by connecting portions 8 projecting from the base end 7a of the insulating coating barrel 7. Yes. The connecting portion 8 has a semi-annular shape, and both ends 8a and 8b are connected to the base end 5e of the substrate 5 which is the center of the insulation coating barrel 7 of the crimp terminal portions 10A and 10B.

  A central apex portion 8c of the semicircular connecting portion 8 is connected to one end edge of the carrier portion 9 via a support portion 9a. The carrier portion 9 is made of a continuous band material, and has pin insertion holes 9h at intervals. A carrier pin (not shown) is inserted into the pin insertion hole 9h, and the processing steps are intermittently performed sequentially. It can be transported.

  As described above, the chain-like component 4 in which the pair of left and right crimp terminal portions 10A and 10B are provided at intervals on the carrier portion 9 via the connecting portion 8 is continuously provided. The boundary S between the support part 9a of the carrier part 9 and the connecting part 8 of the chain-like component 4 is cut and separated, and one intermediate crimp terminal 3 is divided and formed. Since the length of the boundary portion S between the central vertex portion 8c of the connecting portion 8 and the support portion 9a of the carrier portion 9 is short, even an operator can easily cut it.

Since the conductive metal plate constituting the intermediate crimping terminal 3 and the carrier portion 9 is thin with a thickness of 0.20 mm to 0.25 mm, it can be accurately bent with a small dimension. The distance L3 between both side portions 6a and 6b protruding from the substrate 5 at the center of the core barrel 6 of each crimp terminal 10 is 3 mm to ⁴ mm, and is securely in electrical contact with crimping and crimping to a core wire having a cross-sectional area of 0.13 mm ^2. In this way, it is possible to perform crimping connection in a state where electrical connection reliability is ensured.

  Next, a method for forming an intermediate splice of the electric wires 1 and 2 using the intermediate crimp terminal 3 will be described.

First, the intermediate crimp terminal 3 is provided by cutting the connecting portion 8 from the carrier portion 9 of the chain component 4.
The intermediate crimp terminal 3 is mounted on a crimping facility. While positioning the core wire 1a exposed by peeling the electric wire 1 made of the copper-based electric wire on the one crimp terminal portion 10A connected by the connecting portion 8 of the intermediate crimp terminal 3, it is located on the central substrate of the core wire barrel 6. The insulating coating portion 1b that is not peeled is wired so as to be positioned on the insulating coating barrel 7. Similarly, the core wire 2a peeled and exposed of the electric wire 2 made of an aluminum-based electric wire is positioned on the central substrate of the core wire barrel 6 on the other crimp terminal portion 10B, and the uninsulated insulation coating portion 2b is insulated. The wiring is performed so as to be positioned on the covering barrel 7.

  In this state, the core wire 1a of the electric wire 1 is crimped and crimped with the core wire barrel 6 of the one crimp terminal portion 10A, and the insulation coating portion 1b is crimped and crimped with the insulation coating barrel 7. At the same time, the core wire 2a of the electric wire 2 is crimped and crimped with the core wire barrel 6 of the other crimp terminal portion 10B, and the insulating coating portion 2b is crimped and crimped with the insulating coating barrel 7.

The core wire barrel 6 is dimensioned so that a core wire cross-sectional area of 0.13 mm ² can be securely crimped. Therefore, the core wire 1a of the copper wire 1 can be crimped and crimped with the core wire barrel 5 of the one crimp terminal portion 10A, and the core wire 2a of the aluminum wire 2 is crimped and crimped with the core wire barrel 5 of the other crimp terminal 10A. it can. Since the crimp terminal portions 10A and 10B are connected by the connecting portion 8, the electric wire 1 and the electric wire 2 are electrically connected to each other, and an intermediate splice portion can be formed by connecting the extra fine wires with the intermediate crimp terminal 3.

  And although the said electric wire 1 is a dissimilar electric wire which consists of a copper-type electric wire and the electric wire 2 is an aluminum-type electric wire, it can be spliced by crimping and crimping with another core wire barrel, without contacting core wires.

  Since the intermediate splice part where the electric wire 1 and the electric wire 2 are crimped and connected to the intermediate crimping terminal 3 is extremely small, as shown in FIG. 3, the whole can be reliably covered only by winding a waterproof sheet 13 made of a urethane sheet or the like. . In this state, with the waterproof sheet 13 insulated and protected, the wires 1 and 2 can be mounted on the branched wire harness main line 15 and wound around with the adhesive tape 17 to be fixed.

In the embodiment, the copper-based electric wire and the aluminum-based electric wire are spliced with the intermediate crimping terminal 3, but the copper-based electric wires or the aluminum-based electric wires may be spliced with each other using the intermediate crimping terminal 3. .
Furthermore, by changing the sizes of the core wire barrel and the insulation coating barrel, the core wire cross-sectional area is not limited to an electric wire having a cross-sectional area of 0.13 mm ² , and can be used for splicing electric wires of other sizes.

1, 2 Electric wire
DESCRIPTION OF SYMBOLS 1a, 2a Core wire 1b, 2b Insulation coating 3 Intermediate | middle crimp terminal 4 Chain component 5 Board | substrate 6 Core wire barrel 7 Insulation coating barrel 8 Connection part 9 Carrier part 10 (10A, 10B) Crimp terminal part 13 Waterproof sheet

Claims (5)

Two crimping terminal portions for a single electric wire having a U-shaped core wire barrel at the front end side of a substrate made of a conductive metal plate and having a U-shaped insulating coating barrel at intervals are provided. The crimp terminal portion is provided integrally with a connecting portion protruding from the base end side of the insulating coating barrel,
The intermediate crimp terminal, wherein the core wire barrel of each of the crimp terminals has a dimension capable of crimping and crimping an ultrafine wire having a core wire cross-sectional area of 0.13 mm ² or more. 2. The electric wire to be crimped and crimped at each of the crimp terminal portions is a different type of copper-type electric wire and an aluminum-type electric wire, or / and an ultrafine electric wire having a core wire cross-sectional area of 0.13 mm ² or more and 0.35 mm ² or less. The intermediate crimp terminal described in 1. The connecting portion for connecting the two right and left crimp terminal portions is formed in a semi-annular shape, and both ends are connected to the base end of the substrate that is the center of the insulating coating barrel of the two left and right crimp terminal portions,
The semi-annular central apex portion is connected to one end edge of the carrier portion, and the connecting portion is provided in the carrier portion with an interval, and the connecting portion and the carrier portion of the connecting portion are provided. The intermediate crimping terminal according to claim 1 or 2, wherein the boundary portion is cut and provided.   A splice structure in which an electric wire is spliced using the intermediate crimp terminal according to any one of claims 1 to 3.   The splice structure according to claim 4, wherein the intermediate crimp terminal is in a state of being insulated and protected by winding a waterproof sheet in a state in which an electric wire is crimped and connected.

Images