JP7232392B1 - Flat wire with terminal - Google Patents

Abstract

An object of the present invention is to provide a flat electric wire with a terminal that is easy to bend and easy to wire. A flat electric wire (1) with a terminal includes a flat electric wire (2) having a strip-shaped conductor (21) formed by weaving together a plurality of metal wires and an insulator (22) covering the periphery of the conductor (21). , a crimping portion 31 as a fixing portion provided at least one end portion of the flat electric wire 2 and fixed to the end portion of the conductor 21 exposed from the end portion of the insulator 22, and fixing with the connected member and a terminal 3 integrally having a flat connecting portion 32 for the flat electric wire 2, wherein the ratio (W/H) between the thickness H and the width W of the flat electric wire 2 is 4 or more, and the terminal 3 is the connecting portion 32 is provided so that the normal line direction intersects the thickness direction of the flat electric wire 2 . [Selection drawing] Fig. 1

Description

TECHNICAL FIELD The present invention relates to a flat electric wire with a terminal.

Conventionally, busbars molded to match the shape of wiring portions have been used as wiring materials for wiring between devices such as control panels in facilities such as factories or vehicles such as electric vehicles and hybrid vehicles (for example, See Patent Documents 1 and 2).

JP 2019-87471 A JP 2020-177878 A

In recent years, toward the realization of a carbon-neutral society, for example, facilities using industrial robots are being upgraded to energy-saving facilities. Along with the renewal of such facilities, it is also necessary to renew the wiring materials that are wired between devices such as control panels. However, in order to manufacture a busbar suitable for the equipment after renewal, a molding die suitable for the shape of the busbar is required. Therefore, a wide variety of molds are required according to various wiring shapes according to the equipment after renewal, and the production volume of bus bars of the same shape tends to be small. As described above, the bus bar has low versatility and tends to be produced in a small quantity and in a large variety. Therefore, when using the bus bar as a wiring material between apparatuses, there is a problem that the production cost increases.

Therefore, the present inventors considered using a flat electric wire in which the conductor is a braided conductor as a wiring material between devices, which is more versatile than the bus bar.

However, although a terminal is provided at the end of the flat electric wire for connection between the device and the flat electric wire, the flat electric wire may have to be twisted for wiring depending on the shape of the terminal. rice field. Moreover, when a flat electric wire that is difficult to bend is used, especially when wiring is performed in a narrow space between devices, the flat electric wire may meander and interfere with surrounding devices.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a flat electric wire with a terminal that is easy to bend and easy to wire.

In order to solve the above problems, the present invention provides a flat electric wire having a belt-shaped conductor formed by weaving together a plurality of metal wires, and an insulator covering the circumference of the conductor, A fixing part provided at least one end of the flat electric wire and fixed to the end of the conductor exposed from the end of the insulator, and a flat connecting part for fixing to a member to be connected and a terminal integrally having the flat wire, wherein the ratio (W/H) of the thickness H and the width W of the flat electric wire is 4 or more, and the terminal is such that the normal direction of the connection part is the flat wire To provide a flat electric wire with a terminal provided so as to cross the thickness direction of the electric wire.

ADVANTAGE OF THE INVENTION According to this invention, the flat electric wire with a terminal which is easy to bend and is easy to wire can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the flat electric wire with a terminal based on one Embodiment of this invention, (a) is a perspective view, (b) is an enlarged view of the principal part of (a), (c) is A- of (a) It is an A line sectional view. (a) is a schematic diagram showing a wiring example of a flat electric wire with a terminal in FIG. 1, and (b) is a schematic diagram showing a wiring example of a conventional flat electric wire with a terminal. (a) and (b) are cross-sectional views showing a modified example of the flat electric wire 2. FIG.

[Embodiment]
BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a diagram showing a flat electric wire 1 with a terminal according to the present embodiment, (a) is a perspective view, (b) is an enlarged view of a main part of (a), and (c) is a It is a sectional view taken along line AA.

As shown in FIGS. 1(a) to 1(c), a flat electric wire 1 with a terminal includes a flat electric wire 2, a terminal 3 provided at at least one end of the flat electric wire 2, and a heat-shrinkable tube 4. and have.

(Flat electric wire 2)
The flat electric wire 2 has a strip-shaped conductor 21 formed by weaving together a plurality of metal wires, and an insulator 22 covering the conductor 21 .

The conductor 21 is formed by flattening an annular braided conductor. For example, when manufacturing a coaxial line, a braided conductor is provided around a core coated with an insulator around the conductor. The conductor 21 is formed by flattening the braided conductor by pressing or the like. In order to make the flat electric wire 2 easy to bend, it is desirable to use as thin a metal wire as possible for the conductor 21 . The diameter of the metal wire is, for example, 0.10 mm or more and 0.20 mm or less. Here, the conductor 21 having a conductor cross-sectional area of 22 mm ² was formed by braiding 1944 metal strands with a diameter of 0.12 mm.

In this embodiment, a tin-plated annealed copper wire is used as the metal wire used for the conductor 21 . However, the metal wire used for the conductor 21 is not limited to this, and may be, for example, a copper alloy wire, an aluminum wire, an aluminum alloy wire, or the like. As the metal wire used for the conductor 21, a copper foil yarn obtained by spirally winding a copper foil around a tensile strength wire can also be used. Furthermore, the conductor 21 may be configured by a braided conductor in which a first metal wire made of aluminum or an aluminum alloy and a second metal wire made of copper or a copper alloy are interwoven so as to cross each other. By using the conductor 21 including the first metal wire made of aluminum or aluminum alloy with low modulus, the flat electric wire 2 can be easily bent, and when the flat electric wire 2 is bent, the bent shape is maintained. Since it becomes easier to maintain the shape, the wiring work becomes easier when wiring in a narrow space between devices.

Although the case where the conductor 21 is a braided conductor has been described here, the conductor 21 may be formed into a belt shape by interweaving a plurality of metal wires with a loom or the like. In other words, in this specification, the expression "composed of interwoven metal wires" also includes interlacing of metal wires.

The insulator 22 is for protecting the conductor 21, and is made of, for example, a resin composition containing polyvinyl chloride resin as a main component. The thickness of the insulator 22 is preferably 1.5 mm or more and 2.0 mm or less. By setting the thickness of the insulator 22 to 1.5 mm or more, the mechanical strength of the insulator 22 can be ensured, and by setting the thickness of the insulator 22 to 2.0 mm or less, the flat electric wire 2 can be easily bent. can do. In this embodiment, the thickness of insulator 22 is set to 1.8 mm.

The insulator 22 is wrapped around the conductor 21 by insertion extrusion. As a result, the surface of the conductor 21 and the inner surface of the insulator 22 can be brought into close contact with each other to such an extent that the conductor 21 can move within the insulator 22 when the flat electric wire 2 is bent, making it easier to bend the flat electric wire 2. Become.

In this embodiment, the ratio (W/H) of the thickness H to the width W of the flat electric wire 2 is 4 or more. As a result, the flat electric wire 2 has a flatter shape, so that the flat electric wire 2 can be easily bent. Here, the flat electric wire 2 has a thickness H of 6.1 mm, a width W of 30 mm, and a ratio (W/H) thereof of about 4.9. The ratio (Wd/Hd) between the thickness (maximum thickness) Hd and the width (maximum width) Wd of the conductor 21 is also preferably four times or more.

(Terminal 3)
A terminal 3 is provided on at least one end of the flat electric wire 2 . FIG. 1(a) shows a case where terminals 3 are provided at both ends of a flat electric wire 2. FIG. The terminal 3 has a fixing portion (hereinafter referred to as a crimping portion) 31 fixed to the end portion of the conductor 21 exposed from the end portion of the insulator 22 by a fixing method such as crimping, and a device 11 such as a control panel. It is a crimp terminal integrally having a plate-like connecting portion 32 for fixing to a connected member such as an electrode 11a (see FIG. 2(a)) with a bolt or the like. Note that the terminal 3 may be fixed to the conductor 21 by a method other than crimping.

The caulking portion 31 is formed in a cylindrical shape, and is fixed to the conductor 21 by caulking it with the conductor 21 inserted therein. The connecting portion 32 extends outward from the crimping portion 31 in the longitudinal direction of the flat electric wire 2 . The connecting portion 32 is formed in a flat plate shape, and a through hole 32a for passing a bolt is formed in the central portion thereof.

In the flat electric wire 1 with a terminal according to the present embodiment, the terminal 3 is provided so that the normal direction of the connection portion 32 intersects the thickness direction of the flat electric wire 2 . More specifically, the terminal 3 is provided such that the normal direction of the connection portion 32 is orthogonal to the thickness direction of the flat electric wire 2 (parallel to the width direction).

As a result, as shown in FIG. 2(a), it becomes possible to wire by bending the flat wire 2 in the thickness direction, so that wiring can be easily performed in a narrow space between devices 11 such as a control panel. become. The angle of the normal direction of the connection portion 32 with respect to the thickness direction of the flat electric wire 2 can be appropriately adjusted according to the shape and orientation of the electrode 11 a provided in the device 11 . On the other hand, for example, in the case of the conventional flat electric wire 10 with a terminal in which the terminal 3 is provided so that the normal direction of the connecting portion 32 is parallel to the thickness direction of the flat electric wire 2, FIG. , the flat electric wire 2 must be twisted. As a result, the flat electric wire 2 is likely to meander and interfere with (contact with) the device 11, and the flat electric wire 2 may be damaged. According to the present embodiment, such problems can be suppressed, and wiring can be easily performed even in a narrow space between devices 11 .

That is, the angle between the normal direction of the connecting portion 32 and the thickness direction of the flat wire 2 (=the angle between the normal direction of the connecting portion 32 and the thickness direction of the flat wire 2) is the normal to the connecting portion 32. Assuming that the wire direction and the thickness direction of the flat wire 2 are perpendicular to each other is 90 degrees, and that the normal direction of the connecting portion 32 and the thickness direction of the flat wire 2 are parallel to each other is 0 degrees, the terminal 3, it is possible to adjust the orientation of the connecting portion 32 so that the angle is in the range of greater than 0 degrees and less than or equal to 90 degrees. As a result, as shown in FIG. 2(a), the terminal-equipped flat wire 1 is less prone to meandering and twisting during wiring, and wiring can be performed according to the shape and orientation of the electrodes 11a provided in the device 11. becomes.

(Heat-shrinkable tube 4, end shape of flat electric wire 2)
The heat-shrinkable tube 4 is provided from the insulator 22 of the flat electric wire 2 to the crimped portion 31 of the terminal 3 so as to collectively cover the periphery thereof. More specifically, the heat-shrinkable tube 4 bundles together the conductor 21 exposed between the insulator 22 and the terminal 3, at least a portion of the crimped portion 31 of the terminal 3, and the end of the insulator 22. provided to cover. The heat-shrinkable tube 4 serves to cover and insulate the exposed conductor 21 and to prevent moisture, dust, etc. from entering the flat wire 2 .

In this embodiment, the conductors 21 exposed from the insulator 22 of the flat electric wire 2 are bundled and fixed by the caulking portion 31, and the width Wd of the conductor 21 in the flat electric wire 2 is larger than the width Wd of the conductor 21. , the width of the conductor 21 is reduced. The heat-shrinkable tube 4 is provided around the exposed conductor 21 so as to be in close contact therewith as much as possible. Therefore, between the insulator 22 and the terminal 3 , the outer shape of the heat-shrinkable tube 4 has a tapered shape in which the width decreases toward the terminal 3 . A portion between the end portion of the insulator 22 and the terminal 3 is hereinafter referred to as a non-crimping portion 5 . With this configuration, it is possible to bend the flat electric wire 2 in the width direction at the non-crimping portion 5, so that the flat electric wire 2 is less likely to meander or twist during wiring. This makes the wiring work easier. In addition, by shrinking the heat-shrinkable tube 4 sufficiently so as to be in close contact with the periphery of the exposed conductor 21, the heat-shrinkable tube 4 may float from the surface of the insulator 22 when bent. It is possible to prevent the heat-shrinkable tube 4 from getting loose and the heat-shrinkable tube 4 from being misaligned. In this embodiment, the heat-shrinkable tube 4 is not filled with an adhesive.

The length of the non-crimped portion 5 (i.e., the length along the longitudinal direction of the flat wire 2 from the end of the insulator 22 to the terminal 3 is adjusted to facilitate the bending of the non-crimped portion 5 and facilitate the wiring work. ) It is desirable to make L as long as possible. Also, if the length L of the non-crimping portion 5 is too short, the flat electric wire 2 tends to bend into a bow shape when viewed from the longitudinal direction when the conductors 21 are bundled. As a result, when the heat-shrinkable tube 4 is provided, a gap is formed between the heat-shrinkable tube 4 and the insulator 22, and moisture and dust are likely to enter through the gap, which may reduce connection reliability. . Therefore, it is preferable that the length L of the non-crimping portion 5 is at least equal to or greater than the width W of the flat electric wire 2 .

(Modification)
3(a) and 3(b) are sectional views showing a modified example of the flat electric wire 2. FIG. As shown in FIGS. 3A and 3B, the flat electric wire 2 may further have a belt-shaped or linear shape-retaining member 23 provided around the conductor 21 for shape retention.

FIG. 3A shows a case where linear shape retaining members 23a are used, and a pair of shape retaining members 23a are arranged so as to sandwich the conductor 21 in the width direction. As the linear shape retaining member 23a, for example, an annealed copper wire, an aluminum wire, or the like can be used. The number and arrangement positions of the shape retaining members 23a to be used are not limited to those shown in the drawing.

FIG. 3(b) shows a case where a belt-shaped shape retaining member 23b is used, and the shape retaining member 23b is arranged so as to be adjacent to the conductor 21 in the thickness direction. For example, a copper plate can be used as the belt-like shape retaining member 23b.

By having the shape-retaining member 23, it becomes possible to retain the shape of the flat electric wire 2 in a state in which it is bent into a desired shape, thereby facilitating wiring along a desired wiring layout. In the illustrated example, the shape-retaining member 23 is provided between the conductor 21 and the insulator 22, and the shape-retaining member 23 and the conductor 21 are in contact with each other. The shape retaining member 23 may be spaced apart (the insulator 22 may exist between the conductor 21 and the shape retaining member 23).

(Actions and effects of the embodiment)
As described above, in the flat electric wire 1 with a terminal according to the present embodiment, the ratio (W/H) between the thickness H and the width W of the flat electric wire 2 is 4 or more, and the terminal 3 has a connection It is provided so that the normal direction of the portion 32 intersects the thickness direction of the flat electric wire 2 . As a result, the flat electric wire 2 with a terminal can be easily bent in the thickness direction, and the flat electric wire 2 can be prevented from meandering or twisting even in narrow gaps between devices 11 such as control panels. It can be wired, and the wiring work becomes easy. That is, according to the present embodiment, it is possible to realize the flat electric wire 1 with a terminal that is easy to bend and easy to wire. In addition, compared with conventional busbars that have been used as wiring materials for power supply between devices 11, the terminal-equipped flat electric wire 1 can be wired in various wiring layouts and has high versatility. Therefore, it is possible to provide a low-cost wiring material when renewing equipment or the like.

(Summary of embodiment)
Next, technical ideas understood from the embodiments described above will be described with reference to the reference numerals and the like in the embodiments. However, each reference numeral and the like in the following description do not limit the constituent elements in the claims to the members and the like specifically shown in the embodiment.

[1] A flat electric wire (2) having a belt-shaped conductor (21) formed by weaving together a plurality of metal wires and an insulator (22) covering the circumference of the conductor (21) , a fixing part (31) provided on at least one end of the flat electric wire (2) and fixed to the end of the conductor (21) exposed from the end of the insulator (22); a terminal (3) integrally having a flat connecting portion (32) for fixing to a member to be connected, wherein the ratio (W/H ) is 4 or more, and the terminal (3) is provided so that the normal direction of the connection portion (32) intersects the thickness direction of the flat electric wire (2). Electric wire (1).

[2] The terminal-equipped device according to [1], wherein the terminal (3) is provided so that the normal direction of the connecting portion (32) is perpendicular to the thickness direction of the flat electric wire (2). Flat wire (1).

[3] The conductor (21) exposed between the insulator (22) and the terminal (3), at least a part of the fixed part (31) of the terminal (3), and the insulator ( 22) The flat electric wire with a terminal (1) according to [1] or [2], further comprising a heat-shrinkable tube (4) provided so as to collectively cover the ends of 22).

[4] Between the insulator (22) and the terminal (3), the outer shape of the heat-shrinkable tube (4) is tapered so that the width becomes smaller as the terminal (3) is approached. A flat electric wire (1) with a terminal according to [3].

[5] Any one of [1] to [4], wherein the length from the end of the insulator (22) to the terminal (3) is equal to or greater than the width W of the flat wire (2) A flat electric wire (1) with a terminal according to 1.

[6] According to any of [1] to [5], the flat electric wire (2) further has a strip-shaped or linear shape-retaining member (23) provided around the conductor (21) for shape retention. A flat electric wire (1) with a terminal according to any one of claims 1 to 3.

[7] The conductor (21) is composed of a braided conductor in which a first metal wire made of aluminum or an aluminum alloy and a second metal wire made of copper or a copper alloy are woven together, [1] to A flat electric wire (1) with a terminal according to any one of [6].

Although the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the scope of claims. Also, it should be noted that not all combinations of features described in the embodiments are essential to the means for solving the problems of the invention. Moreover, the present invention can be modified appropriately without departing from the gist thereof.

DESCRIPTION OF SYMBOLS 1... Flat electric wire with a terminal 2... Flat electric wire 21... Conductor 22... Insulator 23... Shape retaining member 3... Terminal 31... Crimping part (fixing part)
32... Connection part 4... Heat-shrinkable tube 5... Non-crimped part

Claims (6)

A flat electric wire having a belt-shaped conductor formed by weaving together a plurality of metal wires and an insulator covering the periphery of the conductor;
A fixing part provided at at least one end of the flat electric wire and fixed to the end of the conductor exposed from the end of the insulator, and a flat connecting part for fixing to a member to be connected a terminal integrally having
a heat-shrinkable tube provided to collectively cover the conductor exposed between the insulator and the terminal, the fixed portion of the terminal, and the end of the insulator;
A ratio (W/H) between a thickness H and a width W of the flat electric wire is 4 or more,
The heat-shrinkable tube is provided so as to be able to bend from the longitudinal direction to the width direction of the flat electric wire while covering the conductor between the insulator and the terminal,
The terminal has a shape in which the connecting portion extends outward in the longitudinal direction of the flat electric wire from the fixing portion, and an angle formed between the normal direction of the connecting portion and the thickness direction of the flat electric wire. The fixed portion and the end of the conductor are fixed so that the is greater than 0 degrees and 90 degrees or less,
Flat wire with terminals. The terminal is provided so that the normal direction of the connecting portion is orthogonal to the thickness direction of the flat electric wire.
The flat electric wire with a terminal according to claim 1. Between the insulator and the terminal, the outer shape of the heat-shrinkable tube has a tapered shape in which the width becomes smaller as it approaches the terminal,
The flat electric wire with a terminal according to claim 1 . The length from the end of the insulator to the terminal is equal to or greater than the width W of the flat electric wire,
A flat electric wire with a terminal according to any one of claims 1 to 3 . The flat electric wire further has a strip-shaped or linear shape-retaining member for shape retention provided around the conductor,
A flat electric wire with a terminal according to any one of claims 1 to 4 . The conductor is a braided conductor in which a first metal wire made of aluminum or an aluminum alloy and a second metal wire made of copper or a copper alloy are woven together.
A flat electric wire with a terminal according to any one of claims 1 to 5 .

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