JP2000012121A - Connecting terminal of wire cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To insert and connect a wire cable into a wire inserting port without cutting a strand of a conductor even when an inner diameter of the wire inserting port at an electric equipment side is smaller than a diameter of a conductor of the wire cable. SOLUTION: A connecting terminal 5 comprises a clad portion 3 to be clad fixed to a conductor 1a of a wire cable 1, and a rod-shaped point terminal portion 4 inserted into a wire inserting portion 2a of a connecting portion 2 at an electric equipment side and having a diameter smaller than a diameter of the conductor 1a. The wire cable 1 can be connected to a connecting portion (wire inserting portion 21) without cutting a strand of the conductor 1a even when the inner diameter of the wire inserting port 2a is smaller than the diameter of the conductor 1a. By forming a conical taper portion 3a on a point side of the clad portion 3, the sliding is generated by pressurizing force of a screw 6 and the inclination of the taper portion 3a when the point terminal portion 4 is fastened by a screw 6, the connecting terminal 5 is pushed back, and the clad portion 3 completely comes out of the wire inserting port 2a, whereby the point terminal portion 4 can be stably fastened and fixed by the screw 6 even when an inner diameter of the wire inserting port 2a is larger than the outer diameter of the clad portion 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection terminal of an electric cable for connecting the electric cable to various electric devices, and more particularly, to a method of inserting a conductor of the electric cable into an electric wire insertion port provided on the electric device side. The present invention relates to a connection terminal of a wire cable to be connected.

[0002]

2. Description of the Related Art Hitherto, as one of methods for connecting a conductor of an electric cable to various electric devices (hereinafter simply referred to as devices), there are known methods as shown in FIGS. In FIG. 9, a conductor 1a of the electric cable 1 is formed by twisting a plurality of strands.
Into the wire insertion hole 2a provided in the connection part 2 on the device side, and as shown in FIG.
The conductor 1a is pressed and fixed by the screw 6 screwed into the conductor 1a. However, as shown in FIG. 11, when the diameter R of the conductor 1a of the wire cable 1 is larger than the inner diameter r of the wire insertion port 2a (R> r), the conductor 1a cannot be inserted into the wire insertion port 2a.

Therefore, in this case, as shown in FIG.
A wire on the outer peripheral side of the conductor 1a is cut by an appropriate number so that the wire can be inserted into the wire insertion port 2a, and the outer diameter is reduced before connection.

[0004]

As described above, the conductor 1a having a diameter R larger than the inner diameter r is inserted into the wire insertion port 2a.
When inserting the conductor 1a
After the diameter of the wire is adjusted, the connection work with the connecting portion 2 is performed. However, the work of cutting the wire is not easy, it takes time and effort, and if the work method is not good, each wire becomes one by one. There is a problem that the book is disjointed and it becomes difficult to insert the book into the wire insertion port 2a. In addition, there is a problem that the number of strands at the connection portion of the conductor 1a varies because the manner of the above-described cutting operation varies from worker to worker.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional drawbacks. When connecting a conductor of an electric wire cable to a device, even if the inside diameter of a wire insertion port on the device side is smaller than the diameter of the conductor, An object of the present invention is to provide a connection terminal of a wire cable having a simple configuration, which can easily perform a connection operation without breaking wires and without causing individual differences among operators.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a method for electrically connecting an electric cable and an electric device by inserting a conductor of the electric cable into an electric wire insertion opening of the electric device. In a connection terminal of an electric wire cable, a crimping portion which is formed into a tubular shape and is crimped and fixed to the conductor inserted from the rear end, and is provided integrally with a tip of the crimping portion and has a diameter smaller than the diameter of the conductor and the electric wire. It is characterized in that it has a rod-like shape having a length capable of being completely inserted into the insertion opening, and has a tip terminal part whose surface is roughened.

According to a second aspect of the present invention, in the connection terminal of the electric wire cable according to the first aspect, a conical tapered portion is formed at a tip portion of the crimping portion.

According to a third aspect of the present invention, in the connection terminal for an electric wire cable according to the second aspect, the outer peripheral portion including the tapered portion of the crimping portion is configured as a cap which can be detachably mounted on the inner peripheral portion. And

[0009]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to the embodiment shown in FIGS. 1 and 2 show a connection terminal 5 of an electric wire cable according to an embodiment of the present invention.
And a side view showing a use state of the connection terminal 5. The connection terminal 5 is a conductor 1 of the electric cable 1.
the radial d ₅ of a, assuming a greater than the inner diameter of the electric wire insertion opening 2a of the device-side connecting portion 2 is intended to be attached to the end portion of the conductor 1a, crimping part 3 which is crimped and fixed to the conductor 1a
And a distal end terminal portion 4 integrally provided at the distal end of the crimping portion 3 and inserted into the electric wire insertion opening 2a.

The crimping portion 3 has a conical tapered portion 3a at a tip end thereof and has a cylindrical shape in which a conductor insertion hole 3b for inserting the conductor 1a is formed. diameter _{d 2} is slightly larger than the diameter _{d 5} of the conductor 1a). Diameter _{d 1} of the distal terminal portion 4 is smaller than the diameter _{d 5} of the conductor _{1a (d 1 <d 5)} , roughening 4a on the entire surface
Has been given. As the rough surface processing 4a, for example, fine groove processing such as knurling may be performed.

When attaching the connection terminal 5 to the conductor 1a, as shown in FIG. 2, the conductor 1a of the electric cable 1 is inserted into the conductor insertion hole 3b of the crimp portion 3 of the connection terminal 5 from the rear end, and the crimping is performed. The portion 3 is compressed from the outer periphery and the conductor 1a is fixed by crimping. Then, as shown in FIG.
The terminal terminal portion 4 provided integrally with the tip of the device is inserted into the wire insertion port 2a of the connection portion 2 on the device side, and the two screw holes 2 are formed.
The screw 6 screwed into the terminal b is tightened, and the terminal 6 is pressed and fixed to the connecting portion 2 on the device side with the screw 6. At this time, since the roughened surface 4a is applied to the distal end terminal portion 4, as shown in FIG.
The leading end of the terminal portion 4 bites into the groove of the roughened surface 4a, and the leading terminal portion 4 is securely locked to the connecting portion 2 by the biting of the screw 6, thereby preventing the possibility of slipping out.

In the above embodiment, the tapered portion 3a is formed at the tip of the crimping portion 3, but the connection terminal 5 'shown in FIG.
As described above, without forming the tapered portion 3a in the crimping portion 3 ', a configuration may be adopted in which the boundary portion with the tip terminal portion 4 becomes a mere right-angled step.

By the way, the inner diameter _{d 4} of the electric wire insertion opening 2a of the connection part 2 is larger than the diameter _{d 5} of the conductor 1a _(d 4>
In the case of d ₅ ), it is not necessary to attach the connection terminal 5 to the conductor 1 a, and the conductor 1 a can be directly inserted into the wire insertion port 2 a and tightened and fixed with the screw 6. However, when you've already fixing the connecting terminal 5 to the conductors 1a, the inner diameter d ₄ of the wire insertion opening 2a is significantly greater than the diameter d ₅ of the conductors 1a, for example, the diameter d ₄ is connected inserting slot 2a when that must be connected to the outer diameter d ₃ is larger than device crimp portion 3 of the terminal 5, the leading terminal part 4 when inserted into the wire insertion opening 2a, the crimping part 3 also enters the wire insertion opening 2a Sometimes. FIG. 5 is a diagram for explaining a problem in the case where the tapered portion is not formed in the crimped portion. As shown in FIG. 4, in the case of the connection terminal 5 ′ having the crimped portion 3 ′ having no tapered portion, As shown in FIG.
In the case where the tip terminal part a is inserted, when the tip terminal part 4 is pressed and fixed with the screw 6, the tip terminal part 4 is tightened in a bent state as shown by a broken line, resulting in a problem that an unstable connection is caused. In this case, if the tip terminal portion 4 is made sufficiently long, the crimping portion 3 ′ can be stabilized without entering the wire insertion port 2 a, but the total length of the tip terminal portion 4 can be increased due to the mounting structure to the device. I can't. Therefore,
The above-described tapered portion 3a works effectively. That is, FIG.
As shown in FIG. 1, in the case of the connection terminal 5 shown in FIGS.
When the distal end portion 4 is inserted into the electric wire insertion opening 2a, and is inserted into the electric wire insertion opening 2a up to the distal end portion of the crimping portion 3, that is, the tapered portion 3a, and tightened with the screw 6, the same as FIG. Then, the tip terminal portion 4 is in an unstable state in which it is tilted, but the pressing force by the screw 6 and the inclination of the tapered portion 3a cause a slip at the portion D, and the connection terminal 5 is pushed back in the arrow C direction, As shown in FIG. 7, the crimping portion 3 completely comes out of the wire insertion port 2 a, and the distal end terminal portion 4 is tightened and fixed with the screw 6 in a stable state.

The outer peripheral portion of the crimping portion 3 of the connection terminal 5 including the tapered portion 3a can be formed separately from the inner peripheral portion. That is, for example, the cap 17 shown in FIG. 8 is an outer peripheral portion of the crimping portion 16 of the connection terminal 15 and has a tapered portion 17 similar to the above-described tapered portion 3a on the distal end side.
a and has a tip terminal portion 18a and a non-tapered portion crimped portion (the inner peripheral portion of the crimped portion) 18b having no tapered portion. The cap 17 and the non-tapered portion crimping portion 18b
The crimping part 16 of the connection terminal 15 is formed. This cap 1
When 7 is put on the non-tapered portion crimping portion 18b of the normal connection terminal 18, the connection terminal 15 having the tapered portion 17a in the crimping portion 16 is obtained. Here, since the cap 17 does not necessarily need to be conductive, its material may be any of metal and non-metal.

[0015]

The connection terminal of the electric cable according to the present invention
A crimping part which is cylindrical and is crimped and fixed to a conductor inserted from the rear end, and is provided integrally with the tip of this crimping part, and can be completely inserted into a diameter smaller than the diameter of the conductor and the wire insertion port. It has a rod-like shape with a long length, and has a structure consisting of a tip terminal part whose surface is roughened.
Even when the inside diameter of the wire insertion port is smaller than the diameter of the conductor of the wire cable, the wire cable can be connected to the device side without cutting the conductor wire in order to reduce the diameter of the conductor. Therefore, connection work is facilitated, and there is no individual difference in connection processing. Thereby, workability and reliability of the connection between the electric cable and the electric device are improved. Further, when the distal end portion is fixed with a screw, the screw bites into the rough surface of the outer peripheral surface of the distal end portion, so that the connection terminal can be prevented from falling out of the wire insertion port.

Further, when a tapered portion is formed at the distal end portion of the crimping portion, when the wire insertion port is considerably larger than the diameter of the distal terminal portion, when the distal terminal portion is inserted,
Even when the crimping part enters the wire insertion slot, when tightening with a screw, the crimped part slides out of the tapered part and is pushed out, leaving only the tip terminal part in the wire insertion slot. Is performed reliably, and a stable connection can be realized.

According to the third aspect, the outer peripheral portion of the crimping portion is
Since the present invention is configured as a cap that can be detachably attached to the inner peripheral portion, even when a normal connection terminal having no taper portion is fixed by crimping to the conductor of the electric cable, the present invention can be achieved by covering the cap with this. Can be used as a connection terminal.

[Brief description of the drawings]

FIG. 1 is a side view showing a connecting cable of a wire cable according to an embodiment of the present invention.

FIG. 2 is a side view showing a use state of the connection terminal of FIG. 1;

FIG. 3 is an enlarged view of a portion A in FIG. 2;

FIG. 4 is a side view showing a connection terminal of an electric cable according to another embodiment of the present invention.

FIG. 5 is a diagram for explaining a problem in the case of a connection terminal having a crimp portion without a taper portion, and is a side cross-sectional view showing a state where the connection terminal is inserted and fixed in an electric wire insertion opening having a diameter larger than that of the crimp portion. is there.

FIG. 6 is a view for explaining the operation in the case of the connection terminal of the present invention having a tapered portion in the crimping portion. As in FIG. 5, the connection terminal is inserted and fixed in a wire insertion port having a diameter larger than that of the crimping portion. FIG. 7 is a side cross-sectional view of an initial stage in the case of performing the operation.

7 is a side sectional view showing a state in which the crimping portion of the connection terminal is pushed out of the wire insertion port from the state of FIG.

FIG. 8 is a side view of the cap according to the second embodiment.

FIG. 9 is a perspective view showing a connection procedure between a conventional electric cable and a connection portion on the device side.

FIG. 10 is a side sectional view showing a state where the conductor of the electric cable is inserted into the electric wire insertion opening and fixed in FIG. 9;

FIG. 11 is a side sectional view showing a connection state when the diameter of the conductor of the conventional electric wire cable is larger than the inner diameter of the electric wire insertion port.

[Explanation of symbols]

1 electric wire cable 1a conductor 2 connection part 2a electric wire insertion port 3, 3 ', 16 crimp part 3a, 17a taper part 3b conductor insertion hole 4 tip terminal part 4a roughening 5, 5', 15 connection terminal 6 screw 17 cap 18 Normal connection terminal 18a Tip terminal portion 18b Non-tapered portion crimping portion d ₁ Outer diameter of tip terminal portion d ₂ Inner diameter of conductor insertion hole d ₃ Outer diameter of crimping portion d ₄ Inner diameter of wire insertion port d ₅ Outer diameter of conductor

Claims (3)

[Claims] A connection terminal of an electric cable for electrically connecting an electric cable and an electric device by inserting a conductor of the electric cable into an electric wire insertion port of the electric device, wherein the connection terminal has a tubular shape. A crimping portion that is crimped and fixed to the conductor inserted from the end, and provided integrally with a tip of the crimping portion,
An electric wire cable having a rod-like shape having a diameter smaller than the diameter of the conductor and a length capable of being completely inserted into the electric wire insertion port, and comprising a tip terminal portion whose surface is roughened. Connection terminal. 2. A connection terminal for an electric cable according to claim 1, wherein a conical tapered portion is formed at a tip portion of said crimping portion. 3. The connection terminal of an electric cable according to claim 2, wherein an outer peripheral portion including the tapered portion of the crimping portion is configured as a cap detachably mounted on an inner peripheral portion.