JP2000260503A - Energizing welding connecting connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To equalize a pressurized load during pressurization by electrode rods and to improve a heat balance. SOLUTION: This energizing welding connecting connector has a terminal plate 3, which is held between a pair of electrode rods 5, 6 together with an electric wire conductor 2 and to which the electric wire conductor 2 is welded and connected via energization to the electrode rods 5, 6. In this case, a metal plate 4 is interposed between the electrode rod 5 and the electric wire conductor 2 on the side opposite to the terminal plate 3. Since the metal plate 4 is interposed between the electrode rod 5 and the electric wire conductor 2 directly abutting against each other in prior art, a pressurized load or a contact resistance can be equalized and an energization path becomes symmetric, thereby improving positioning property and heat balance. Breaking strength at a connected portion is also enhanced and stability is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector for connecting a cable for an electronic device, a cable for a vehicle or a cable for a facility to an electric wire or the like of a counterpart, and more particularly to a connector for a current welding connection.

[0002]

2. Description of the Related Art In general, there is known an electric welding connection connector for connecting a cable for an electronic device, a cable for a vehicle or a cable for a facility to an electric wire or the like of the other party. This is different from a normal detachable connector in that disconnection is not allowed after the connection between the cable and the electric wire is completed. For this reason, the connection is made firmly and semi-permanently by the electric current welding, and the tensile strength and the like are sufficiently secured. In this connector, a conductor of a cable core is connected to one end of a terminal plate, and a conductor of a counterpart electric wire is connected to the other end of the terminal plate. Note that these conductor portions are collectively referred to as wire conductors. The connection between the wire conductor and the terminal plate has been made by the method described later.

That is, as shown in FIG. 20, a terminal plate a and a wire conductor b are both sandwiched between a pair of electrode rods c and d, and they are welded while being pressed against each other. In this manner, the plurality of connection portions e completed for each electric wire and each cable core are arranged in a common connector body.

The electric wire conductor b may be a single wire as shown in FIG. 21 or a stranded wire as shown in FIG. The arrangement of the connecting portions e is generally a method of arranging the connecting portions e on the upper surface side of the connector body as shown in FIG. Usually, the electrode rods c and d are arranged vertically, and the lower electrode rod d is fixed and the upper electrode rod c is pressed from above.

[0005]

By the way, in the above-mentioned connector, the electric wire conductor b has a circular cross section, and only the upper electrode rod c directly contacts the electric wire conductor b to apply pressure. Thus, there is a problem that the degree of application of the force from above and below to the wire conductor b is uneven, and the wire conductor b escapes.

Further, as shown in FIG. 23, when the wire conductor b is a stranded wire, each core f is disintegrated simultaneously with pressurization, and a part of the core f protrudes from the terminal plate a. There is also.

On the other hand, the current supply path during welding is a lower electrode rod d.
→ Terminal plate a → Wire conductor b → Upper electrode rod c. However, since this path is vertically asymmetric, the heat generated by the contact resistance during energization becomes uneven in the vertical direction, and the heat balance is poor.

As described above, there is a problem that the breaking strength of the connection portion e is reduced and the connection is varied.

In addition, since the connecting portions e are arranged in parallel, there is a problem that the connector body becomes relatively large.

[0010]

SUMMARY OF THE INVENTION The present invention relates to a current welding connector having a terminal plate which is sandwiched between a pair of electrode rods together with a wire conductor and which is connected by welding to the electrode rods. A metal plate is provided on the opposite side of the terminal plate between the electrode rod and the electric wire conductor.

According to this, since the metal plate is interposed between the wire conductor and the electrode rod, which have been directly contacted in the past, the pressing load and the contact resistance can be equalized, and the conduction path can be symmetrical. Positioning and heat balance are improved. Further, the breaking strength of the connection portion is also improved and stabilized.

Here, it is preferable that the metal plate is a bent plate integrally provided on one side of the terminal plate. This allows the bent plate to bend and the metal plate to be interposed at the same time as the pressurization by the electrode rods, thereby significantly improving workability. Further, the connection portion between the terminal plate and the bent plate can prevent the wire conductor from protruding.

[0013] Preferably, at least one side of the terminal plate or the metal plate is integrally provided with a claw portion bent toward the electric wire conductor. This is because the protrusion of the wire conductor can be prevented by the claw portion.

Preferably, the plurality of terminal plates are arranged in a zigzag pattern on the front and back sides of the connector body. This is because the connector body becomes very compact.

[0015]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

First, a first embodiment will be described. As shown in FIG. 1, a connection portion 1 of this connector is formed by sandwiching an electric wire conductor 2 between a terminal plate 3 and a metal plate 4 and further sandwiching them in a pressurized state between a pair of electrode rods 5 and 6 to conduct current welding. It becomes. Specifically, the terminal plate 3 is placed on a fixed connector body (not shown), and the wire conductor 2 (here, a stranded wire) is placed on the terminal plate 3. The lower electrode rod 6 serving as a fixed side is brought into contact with the lower surface of the substrate. Thereafter, the metal plate 4 is applied to and held on the electric wire conductor 2 opposite to the terminal plate 3, and the upper electrode bar 5 is pressed from above the metal plate 4. When current is supplied from the lower electrode rod 6 to the upper electrode rod 5, the electric wire conductor 2, the terminal plate 3, and the metal plate 4 are integrally fixed by welding.

According to this, since the metal plate 4 is interposed between the electric wire conductor 2 and the upper electrode rod 5, which have been directly contacted in the past, the pressing load and the contact resistance become equal in the vertical direction, and the current path Are also vertically symmetric. Thereby, the positioning property and heat balance of the electric wire conductor 2 are improved. And the breaking strength of the connection part 1 is also improved and stabilized.

In order to maximize the effect, it is desirable that the metal plate 4 and the terminal plate 3 have the same material, the same structure, and the same dimensions. The width w between the metal plate 4 and the terminal plate 3 is preferably at least 1.1 times the outer diameter D of the electrode rods 5 and 6. This is because even if the electrode rods 5 and 6 are slightly displaced, they come into contact with the entire surface.

Incidentally, with the above structure, the metal plate 4 must be held at a fixed position until welding is completed.
Workability is relatively poor. In addition, it is impossible to prevent the wire conductor 2 from protruding from the terminal plate 3, particularly, protruding from the stranded core wire. Therefore, this is improved in the second embodiment shown in FIG.

That is, in this embodiment, a bent plate 7 is provided integrally on one side of the terminal plate 3 in the width direction, and forms the metal plate 4. Further, a claw portion 8 is integrally provided on the other side in the width direction of the terminal plate 3. The bent plate 7 and the claw portion 8 are formed by bending one side and the other side of the terminal plate 3 toward the electric wire conductor 2. The bent plate 7 has a longer width than the claw portion 8 and has the above-described width w. Claw part 8 is terminal plate 3
It is preferable that the erecting height h is 35% or more of the outer diameter d of the electric wire conductor 2.

As shown in FIG. 3, at the time of the electric current welding, the lower electrode rod 6 is brought into contact with the lower surface of the terminal plate 3 in the same manner as described above.
The bent plate 7 is pressed from above by the upper electrode rod 5 and bent (so-called crimped state), and while the pressed state is maintained, the bent plate 7 is brought into close contact with the electric wire conductor 2 and energized. At this time, even if the stranded core wire 9 is dislocated as shown in the figure, the connection portion 10 between the terminal plate 3 and the bent plate 7 and the claw portion 8 prevent the stranded core wire 9 from protruding. In other words, after the folding plate 7 is bent, the stranded core wire 9 is confined in a closed space.

As described above, the bending plate 7 is bent and interposed at the same time as the pressurization of the upper electrode rod 5, and the bending plate 7 does not move integrally with the terminal plate 3, so that the metal plate as in the above-described embodiment is used. There is no need to hold the plate 4, and workability is significantly improved.

The width dimension w of the bent plate 7 is
Since the outer diameter D is 1.1 times or more, there is no concern that the upper electrode rod 5 hits the claw portion 8 during pressurization, whereby the contact resistance is stabilized and the heat balance can be maintained well.

Here, the material of the terminal plate 3 is preferably copper, copper alloy, nickel or the like having good electrical welding connection properties, and the surface of the terminal plate 3 is plated with tin, solder, silver, gold or the like. And electric current welding can be stabilized, which is more preferable.

Next, FIGS. 4 and 5 show a third embodiment.
In this case, four terminal plates 12 are provided on the front and back sides, that is, upper and lower sides, of the connector body 11, and these terminal plates 12 are arranged in a staggered manner as shown in FIG.

As shown in FIG. 4, the connector body 11 extends to the left and right sides, and the wires X and the wire conductors Y are inserted from opposite sides in the extending direction, and are connected to the terminal plate 12. Reference numeral 13 denotes an insertion hole for an electric wire or the like, and 14 denotes a mounting portion for an electric wire or the like. In the case of the electric wire X, the electric wire conductor Y exposed by peeling off the coating at the tip is placed on the terminal plate 12.
The material of the connector body 11 is PBT, ABS, nylon resin, or the like, which has good heat resistance against heat generated during current welding and has good moldability.

Each terminal plate 12 is also extended to the left and right sides, and is integrally provided with a bent plate 15 and a claw portion 16 as described above at both ends in the extending direction. The upper and lower terminal plates 12 are partitioned by an intermediate partition 17, and the front and rear terminal plates 12 are separated from each other by vertical walls 18 as shown in FIG.
Partitioned by. Each vertical wall 18 is located just below or above each terminal plate 12, and the terminal plate 1
2 are staggered. Each of the bent plates 15 is connected to the front and rear outer positions of each of the terminal plates 12 so that the terminal plate 12 receives a force toward the center of the connector when the bent plate 15 is pressurized and bent, and is pressed against the vertical wall 18. ing.

As described above, the terminal plates 12 are staggered up and down and the lower side is also used, so that the connector body 11 can be made very compact as compared with the conventional arrangement method in which only the upper side is arranged in parallel.

According to the conventional arrangement method, the connector bodies expand in the parallel direction and become wide. In addition, since it is necessary to bend the wires in the connector body and expand them at a predetermined interval, a certain extra length must be accommodated in the connector body, and the length of the connector body also increases.

In the present embodiment, since the wires are arranged vertically, the wires are not wide, and the wires can be handled almost straight, so that the length can be reduced. That is, compactness can be achieved in both the cross-sectional direction and the longitudinal direction of the connector. For example, the connector of this embodiment can be reduced in size to 0.5 times the cross-sectional direction and 1 time in the longitudinal direction with respect to the finished outer diameter of a cable formed by twisting a plurality of insulated wires.

Next, a fourth embodiment will be described with reference to FIGS. As shown in the figure, the connector body 19 has a substantially rectangular parallelepiped shape that is long in the left and right directions, and two terminal plates 20 are provided on the upper surface side and the lower surface side of the connector body 19, respectively. ing. Each terminal plate 20 extends left and right, and a bent plate 21 and a claw portion 22 are integrally provided at both ends thereof. The upper terminal plate 20 has a straight shape, and the lower terminal plate 20 has a crank shape. Each terminal plate 20 is arranged to be shifted to the left side of the connector body 19. 23 is an insertion groove for inserting an electric wire or an electric wire conductor from above or below, and 24 is a mounting portion for mounting an electric wire or the like. Each terminal plate 20 is partitioned by an intermediate partition 25 and a vertical wall 26. In addition, a notch groove 27 is provided adjacent to the bent plate 21 and extends outwardly in the front-rear direction, so that an electrode rod (not shown) can be easily inserted. The connector body 19 is made of PBT resin. The terminal plate 20 is made of brass, and has a surface plated with tin.

The terminal plate 20 is wide at a position where the bent plate 21 and the claw portion 22 are located, and is narrow at another position.
The former is a portion where the wire conductor is welded, that is, a welded portion 28, and the latter is a connecting plate 29 for connecting the welded portions 28 to each other. With such a terminal plate shape, the wide portions 30 and the narrow portions 31 also appear alternately on the vertical wall 26. In particular, here, the welded portion 28 of the terminal plate 20 is shifted not only to the front and rear but also to the left and right, so that the welded portion 28 is located just behind the wide portion 30. The wide portion 30 is provided with an electrode rod insertion hole 32 penetrating vertically, into which an electrode rod (not shown) is inserted so that the electrode rod can be brought into contact with the back surface of the welded portion 28 at the back of the hole 32. Has become.

Therefore, when the electric wire conductor is electrically welded, the second
As in the embodiment, the terminal plate 20, the electric wire conductor, and the bent plate 21 can be pressed from above and below with electrode rods.

As described above, when the terminal plates are arranged in a staggered manner, the electrode rod insertion space as described above can be made on the back side of the terminal plate. A rod can be inserted, and an ideal pressure state from the opposite direction can be realized.

Particularly, in the present embodiment, a terminal plate shape and a vertical wall shape in which a wide portion and a narrow portion alternately appear are adopted, the upper and lower terminal plates are shifted to the left and right, and the wide portion between the terminal plate and the vertical wall, Since the narrow portion has a front-to-back relationship, the front and rear adjacent terminal plates can be close to each other, and an ideal and extremely compact layout can be realized.

Since the lower terminal plate 20 is shifted to the right from the upper terminal plate 20, the electrode rod insertion hole 32 with respect to the welding portion 28 at the right end of the lower terminal plate 20 is
The opening is not provided in the mounting portion 24 but in the mounting portion 24. The mounting portion 24 is also provided with an electrode rod insertion hole 33 for spare. As shown in FIG. 8, in the insertion groove 23, a widened portion 34 is inserted with a covered wire portion, and a narrowed portion 35 is inserted with a stripped wire conductor portion.

Next, a fifth embodiment will be described with reference to FIGS. The description of the same parts as in the third embodiment will be omitted, and the same reference numerals will be used in the drawings.

As shown in the figure, the connector body 36 is extended to the right side as compared with that of the third embodiment, and the overall length is longer. As shown in FIG. 15, small projections 37 are provided on the wide portions 34 of the insertion grooves 23 to prevent the wires from coming off when covering the wires. At the left end of the connector body 36, a pin 38 for projecting into a mating connector or the like is provided to protrude.

Although the embodiment of the present invention has been described above, the embodiment is not limited to the above-described embodiment. For example, the electric wire conductor may be a lead wire of an electric component such as a resistor.
In addition, for example, in the first embodiment shown in FIG. 1, the claw portions can be provided on one side or both sides of the terminal plate 3 or the metal plate 4.

[0040]

The present invention exhibits the following excellent effects.

(1) The pressing load on the wire conductor is equalized on both electrode rod sides, and the positioning of the wire conductor can be improved.

(2) The heat balance can be equalized on both electrode rod sides.

(3) It is possible to prevent the wire conductor from protruding from the terminal plate.

(4) The breaking strength of the connection portion can be improved.

(5) The connector body can be made compact.

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment according to the present invention.

FIG. 2 is a front view showing a second embodiment according to the present invention, showing a state before energization welding.

FIG. 3 is a front view showing a state at the time of electric current welding;

FIG. 4 is a vertical sectional front view showing a third embodiment according to the present invention.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a plan view showing a fourth embodiment according to the present invention.

FIG. 7 is a front view of the same.

FIG. 8 is a bottom view of the same.

FIG. 9 is a sectional view taken along the line DD of FIG. 11;

FIG. 10 is a sectional view taken along line BB of FIG. 6;

FIG. 11 is a left side view showing a fourth embodiment according to the present invention.

FIG. 12 is a sectional view taken along line CC of FIG. 8;

FIG. 13 is a plan view showing a fifth embodiment according to the present invention.

FIG. 14 is a front view of the same.

FIG. 15 is a bottom view of the same.

FIG. 16 is a sectional view taken along line GG of FIG. 18;

FIG. 17 is a sectional view taken along line EE of FIG. 13;

FIG. 18 is a left side view showing a fifth embodiment according to the present invention.

19 is a sectional view taken along line FF of FIG.

FIG. 20 is a perspective view showing a conventional electric current welding method.

FIG. 21 is a front view showing the case where the electric wire conductor is a single wire.

FIG. 22 is a front view showing the case where the electric wire conductor is a stranded wire.

FIG. 23 is a front view showing a state where the stranded wires are loose.

FIG. 24 is a front view showing a conventional terminal board arrangement method.

[Explanation of symbols]

 2, Y wire conductor 3, 12, 20 Terminal plate 4 Metal plate 5 Upper electrode rod 6 Lower electrode rod 7, 15, 21 Folding plate 8, 16, 22 Claw part 10 Connecting part 11, 19, 36 Connector body

Continued on the front page (72) Inventor Yoshikazu Hayakawa 5-1-1 Hidakacho, Hitachi City, Ibaraki Prefecture Inside the Hidaka Factory, Hitachi Cable Co., Ltd. (72) Inventor Takaro Ichikawa 5-1-1 Hidakacho, Hitachi City, Ibaraki Prefecture No. 1 F-term in Hitachi Cable, Ltd. Power System Research Laboratories (Reference)

Claims (4)

[Claims] An electric welding connection connector having a terminal plate sandwiched between a pair of electrode rods together with an electric wire conductor and being connected to the electric wire conductor by welding through the electrode rods, wherein the terminal plate is opposite to the terminal plate. A metal plate for being interposed between the electrode rod and the electric wire conductor on the side of the connector. 2. The connector according to claim 1, wherein the metal plate comprises a bent plate integrally provided on one side of the terminal plate. 3. The connector for electrical welding connection according to claim 1, wherein at least one side of the terminal plate or the metal plate is integrally provided with a claw portion bent toward the electric wire conductor. 4. The connector for electrical welding connection according to claim 1, wherein the plurality of terminal plates are arranged in a staggered pattern on the front and back sides of the connector body.