JPH11265739A - Terminal metal piece and connection structure to cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily remove a cable connected to the terminal metal piece from a terminal metal piece in dismantling a vehicle. SOLUTION: This terminal metal piece formed by stamping a conductive metal sheet and bending it has a shape, in which a board part connected to an electrical contact part 11 is bent from its both sides, in order to form an almost cylindrical cable connecting part 12 with an opening at its tip having on its upper side and in its axial direction a slit 14 formed by a gap between its both end rims, and many thorny protuberances 15 are protruded from an inside perimeter surface of the cylindrical cable connecting part 12. The cable is fixed by inserting the cable in the cable connecting part and sticking the thorny protuberances 15 into an insulating coating. When removing the cable, it is removed by pulling the cable to open the slit 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal fitting and a connection structure for connecting the terminal fitting to an electric wire, and more particularly to a terminal fitting fixed to a vehicle body panel or the like when the vehicle is dismantled by a scrap car, which can be easily detached from the electric wire. Thus, the removal of the electric wire from the vehicle body is facilitated.

[0002]

2. Description of the Related Art Conventionally, a bolted terminal fitting 1 such as an earth terminal fitting as shown in FIG. 8 has a U-shaped core wire crimping barrel 1c and an insulating coating barrel 1d in an electric contact portion 1b having a bolt hole 1a. It is formed by punching and bending integrally. The terminal of the electric wire 2 connected to the terminal fitting 1 is peeled in advance to expose the core wire 2a.

The connection of the electric wire 2 to the terminal fitting 1 is shown in FIG.
As shown in FIG. 1, a core wire 2a of an electric wire 2 is attached to a terminal fitting 1 set on a press (not shown).
c, an insulating coating 2b continuous with the core wire 2a is inserted into the insulating coating barrel 1d, and in this state, the core wire crimping barrel 1c is caulked and crimped to the core wire 2a by a press, and the insulating coating 2b is insulated by the insulating coating barrel 1d. It is connected by crimping.

As shown in FIG. 10, a terminal fitting 1 crimp-connected to the electric wire 2 has a bolt 3 inserted into a bolt hole 1a.
The bolt 3 is inserted into the mounting hole 4 a of the vehicle body panel 4, and is tightened and fixed to the nut 5. Alternatively, when the terminal fitting 1 is attached to the power supply line, the terminal fitting 1 is bolted and fixed to the bus bar housed in the electric connection box.

[0005]

When the terminal fitting 1 is caulked and fixed to the electric wire 2 by a press, there is an advantage that the electric wire and the terminal fitting are not easily separated because the terminal fixing force is excellent. However, when the vehicle body is dismantled, if the terminal fitting and the electric wire are to be separately collected and recycled, the terminal fitting and the electric wire cannot be easily separated, and the electric wire is cut off from the terminal fitting and separated. ing. Therefore, the electric wire remains in the terminal fitting, and the terminal fitting cannot be recycled.

Further, when removing the wire harness composed of these wire groups from the vehicle body, the wire harness cannot be removed from the vehicle body unless all the wires are cut and separated from the terminal fittings which are bolted. There is a problem that it takes a lot of trouble to remove it from the device.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and enables the electric wires to be easily separated from the terminal fittings at the time of disassembling the vehicle body, so that the electric wires and the terminal fittings can be separated and collected. It is an object of the present invention to easily separate an electric wire from a terminal fitting bolted and fixed to a vehicle body panel or the like so that a wire harness can be efficiently removed.

[0008]

In order to solve the above-mentioned problems, according to the present invention, a conductive metal plate is punched out by a method according to the present invention.
In a terminal fitting formed by bending, a substantially cylindrical body which is formed by bending a substrate part continuous from a part of an electric contact part from both sides and having a slit formed by a gap between edges on both sides in an axial direction on an upper surface side. The present invention provides a terminal fitting in which an electric wire connection portion having an open end is formed, and a large number of stab-like projections are formed on the inner peripheral surface of the cylindrical electric wire connection portion.

It is also possible to form a hole in the wire connecting portion so that the burr projects on the inner peripheral surface side, and the burr protruding at the time of boring may be a barbed projection.

[0010] Both side edges of the electric wire connection portion are projected so as to be bonded to the outside with the above gap, and the electric contact portion side of the electric wire connection portion is inclined to have a flat shape close to the substrate portion. Further, the barbed projections are made to protrude over the entire inner peripheral surface of the electric wire connection portion, and the barbed protrusions are made to protrude at right angles to the inner peripheral surface or in a direction opposite to the wire insertion side (claim 2). .

According to a third aspect of the present invention, there is provided a connection structure between the terminal fitting and the electric wire according to the first or second aspect, wherein the end of the core exposed from the end of the electric wire is welded. The wire is inserted into the wire connecting portion of the terminal fitting, the core wire is brought into contact with the substrate portion, and the barbed projection is hooked on an insulating coating continuous with the core wire to connect with the wire. When separating the metal fittings and the electric wire, by providing a connection structure between the terminal metal fitting and the electric wire, the electric wire can be detached from the electric wire connecting portion by pulling the electric wire diagonally upward in a direction to push and spread the slit. I have.

As described above, when connecting the terminal fitting and the electric wire, it is only necessary to insert the electric wire into the electric wire connecting portion of the terminal fitting, and it is not necessary to press with a press machine as in the prior art, and the connection work is eliminated. It's easy. In addition, the spliced projection of the inner peripheral surface of the wire connecting portion of the connected wire cuts into the insulation coating of the wire, so that even if an external pulling force is applied to the wire in the axial direction by the external force, the wire is connected to the wire connecting portion. It does not come off, and the connection can be reliably maintained. In particular, if the barb is projected in the direction opposite to the insertion side of the wire,
The insertion of the electric wire is further facilitated, and the holding force on the electric wire can be increased.

On the other hand, when it is necessary to separate the electric wire from the terminal fitting when disassembling the car, the electric wire is not pulled in the axial direction but is pulled obliquely upward, so that the slit provided on the upper surface of the terminal fitting pushes and spreads. The wire can be pulled out.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2A and 2B show a terminal fitting 10 of the present invention. The terminal fitting 10 is formed by punching and bending a conductive metal plate. Terminal fitting 1
0 is a disk-shaped electric contact portion 1 having a mounting hole 11a at the center.
1 has a shape in which the wire connection portion 12 is continuous. The wire connection portion 12 is formed by bending both side portions 12b and 12c of the substrate portion 12a extending from the electric contact portion 11 to have a substantially cylindrical shape having an opening 12d at the tip.

The substantially cylindrical electric wire contact portion 12 is formed by leaving a substrate portion serving as the core wire contact portion 13 between the electric wire contact portion 11 and the electric wire connection portion on the side of the core wire contact portion 13. Reference numeral 12 is pressed toward the substrate to form a flat portion 12e.

Both side portions 12b, 12 of the electric wire connection portion 12
The edges 12b-1 and 12c-1 of c are protruded so as to be bonded to the outside with a gap. This gap becomes the slit 14 in the axial direction, and is located on the upper surface side facing the substrate portion 12a.

FIG. 2 shows the entire inner peripheral surface of the wire connecting portion 12.
As shown in FIG. These barbed projections 15 are inclined in the direction opposite to the opening 12d. In addition, as shown in FIG. 3 (A), the barbed projection 15 may be projected in a right angle direction, but is not inclined toward the opening 12d. In addition, as shown in FIG.
A hole may be formed from the outer surface of 2 and burrs formed on the inner surface side may be used as barbed projections 15 '.

The inner diameter of the cylindrical portion of the electric wire connection portion 12 is set slightly larger than the outer diameter of the electric wire 20 to be connected. Is set so as not to pierce the core wire 22 inside the insulating coating 21.

The electric wire 2 connected to the terminal fitting 10 having the above shape
Numeral 0 indicates that the terminal is peeled off to expose the core wire 22 and the exposed distal end 22a of the core wire 22 is fixed by welding. This is to prevent the core wires 22 from falling apart and being caught on the stab-like projections 15 when inserted into the electric wire connection portion 12 of the terminal fitting 10.

As shown in FIG. 4, the terminal fitting 10 and the electric wire 20 are connected to each other by inserting the electric wire 20 into the electric wire connection portion 12 from the core wire 22 side. The core wire 22 can be inserted without coming into contact with the barbed projection 15, and the flat portion 12e
It is pushed down to the side, and comes into contact with the core wire contact portion 13 at a position protruding from the wire contact portion 12. In this state, core wire 2
The stab-like protrusion 15 penetrates and cuts into the insulating coating 21 of the portion continuous with the wire 2, and the electric wire 20 and the terminal fitting 10 are fixed.

In the above-mentioned connection state, the terminal fitting 20 is inserted into the mounting hole 11a of the electrical contact portion 11 as shown in FIG.
Is inserted into a mounting hole 31a formed in the vehicle body panel 31, and is fixed to the vehicle body panel 31 by fastening with a nut 32, and the electric wire is grounded. In this fixed state, even if the pull-out force in the axial direction of the electric wire 20 as shown by the arrow is carelessly applied to the electric wire 20, the barbed projection 15 is inclined in the direction opposite to the direction in which the pull-out force acts. In addition, the barbed projection 15 does not come off from the insulating coating 21 of the electric wire 20, so that the electric wire 20 can be prevented from detaching from the terminal fitting 10.

On the other hand, when it is necessary to separate the terminal fitting 10 and the electric wire 20 at the time of dismantling the car, as shown in FIG. 7A, the electric wire 20 pushes the slit 14 on the upper surface of the electric wire connection portion 12 so as to spread. Pull diagonally upward. By the pulling of the electric wire, the slit 14 is pushed out from the opening 12d side as shown in FIGS. 7B and 7C. As described above, when the electric wire 20 is taken out while opening the slit 14, the barbed projection 15 can be easily pulled out from the insulating coating 21, and the electric wire 20 can be separated from the terminal fitting 10.

In the above embodiment, the terminal fitting 10 serving as a ground terminal is connected to the electric wire 20 and the terminal fitting 10 is fixed to the vehicle body panel 31.
To the terminal fitting 10, and the terminal fitting 10 is connected to the bus bar of the electric connection box with bolts and nuts. Furthermore, the present invention can be applied not only to the ground terminal but also to a terminal fitting connected to another electric wire.

[0025]

As is apparent from the above description, according to the present invention, the connection between the terminal fitting and the electric wire can be established only by inserting the electric wire into the electric wire connecting portion of the terminal fitting, as in the prior art. It is not necessary to caulk and crimp using a press machine, and the worker can easily connect by hand.

Also, when disassembling an automobile, when it is necessary to separate the electric wire from the terminal fitting, the electric wire can be easily separated from the terminal fitting simply by pulling the electric wire in the direction of pushing and expanding the slit of the electric wire connection portion. . Therefore, the electric wires and the terminal fittings can be separated and collected, and the terminal fittings and the electric wires can be recycled.

[Brief description of the drawings]

FIG. 1 is a perspective view of a terminal fitting of the present invention.

2A is a sectional view taken along line AA of FIG. 1, and FIG. 2B is a sectional view taken along line BB of FIG.

FIGS. 3A and 3B are enlarged views of a main part showing a modified example of a barbed projection.

FIG. 4 is a perspective view showing a step of connecting a terminal fitting and an electric wire.

FIGS. 5A and 5B are cross-sectional views of a connected terminal fitting and an electric wire.

FIG. 6 is a sectional view showing a state where the terminal fitting is fixed to the vehicle body panel.

FIGS. 7A, 7B, and 7C are views showing a work of separating a terminal fitting and an electric wire.

FIG. 8A is a perspective view showing a conventional terminal fitting,
(B) is a sectional view of a main part.

FIG. 9 is a perspective view showing a conventional process of connecting a terminal fitting and an electric wire.

FIG. 10 is a sectional view showing a state in which a conventional terminal fitting is attached to a vehicle body panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Terminal fitting 11 Electric contact part 12 Electric wire connection part 12a Substrate part 12b, 12c Both side parts 12d Opening 12e Flat part 13 Core wire contact part 14 Slit 15 Stab projection 20 Electric wire 21 Insulating coating 22 Core wire

Claims (3)

[Claims] In a terminal fitting formed by punching and bending a conductive metal plate, a substrate portion continuous with a part of an electric contact portion is bent from both sides to form a gap between edges of both side portions. A terminal fitting in which a substantially cylindrical wire connection portion having a distal end opening having a slit on an upper surface side in an axial direction is formed, and a large number of barbed protrusions protrude from an inner peripheral surface of the cylindrical wire connection portion. 2. A flat shape in which both side edges of the electric wire connection portion are projected so as to be bonded to the outside with a gap therebetween, and the electric contact portion side of the electric wire connection portion is inclined to be close to the substrate portion. The barbed projections are made to protrude over the entire inner peripheral surface of the electric wire connection portion, and the barbed protrusions are made to protrude at a right angle from the inner peripheral surface or in a direction opposite to the wire insertion side. The terminal fitting described in. 3. A connection structure between a terminal fitting and an electric wire according to claim 1 or 2, wherein a tip end of a core wire exposed from an end of the electric wire is welded, and the electric wire is connected to the terminal fitting. Inserting the wire into the wire connection, contacting the core wire with the substrate and hooking the barbed projection on the insulating coating continuous with the core wire to connect to the wire, while separating the terminal and the wire, A connection structure between a terminal fitting and an electric wire, wherein the electric wire is pulled obliquely upward in a direction in which the slit is pushed open so that the electric wire can be removed from the electric wire connection portion.