JPH0134284Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The invention relates to a wire connection terminal that is fixed to the end of an electric wire and is used to connect the wire not only to the bare wire but also to the wire. This can also be done on the covered part.

<Conventional technology> Conventionally, this type of electric wire connection terminal is a bare electric wire made of a good conductive material such as copper or copper alloy, with the connection part and the end of the wire peeled off for connection to various electrical devices, etc. A cylindrical portion for connecting to the cylindrical portion and the cylindrical portion were integrally formed in series.

Further, a covering sleeve having a small-diameter cylindrical portion that covers the cylindrical portion for connecting the bare electric wire and a large-diameter cylindrical portion that covers the end portion of the wire sheathing is fitted over the cylindrical portion for connecting the bare electric wire. There were things too.

<Problems to be solved by the invention> Therefore, in the conventional terminal for connecting electric wires of this kind, a bare electric wire part with the covering of the electric wire removed is inserted into a tube part for connecting bare electric wire, and the part is deformed under pressure. Therefore, the external force that the wire receives in the radial direction against the terminal and the vibration that the terminal receives from the equipment connected to the terminal are transmitted to the base of the bare wire, that is, to the terminal tube. There was a problem in that the application was concentrated on the part located between the wire sheathing part, making the base part brittle and easily cut. Further, this phenomenon also occurred when the sleeve was used by fitting it into the cylindrical portion. That is, the covering sleeve that is fitted over and covers the cylindrical part of the terminal is made of hard, non-deformable vinyl chloride, etc., and the large diameter cylindrical part that covers the covering part of the electric wire is made of a material such as vinyl chloride that is hard to deform. Since the wire is formed to have a large diameter so that it can be easily inserted, there is a gap between the inner circumferential surface and the outer circumferential surface of the wire coating, and the wire itself can freely move around the terminal within this gap. This is because, since the electric wire is structured to be able to move in the direction, movement in the circumferential direction of the electric wire starts from the base of the bare electric wire, as described above. Therefore, in this case as well, it was unavoidable that the bare wire was weakened intensively between the terminal tube portion and the bare wire.

Therefore, in order to solve such conventional problems, the present invention has a structure in which the electric wire does not move in the circumferential direction at the base of the connecting cylinder part and the covered end of the terminal, so that the base end of the bare electric wire can be fixed. A wire connection that prevents local weakening of the terminal and allows for long-term use even if the various devices connected to the terminal vibrate. The purpose is to obtain a terminal for use.

<Means for solving the problems> The structure of the present invention for achieving the object will be explained using FIGS. 1 to 5 corresponding to the embodiments. In a wire connection terminal 1 which is made of a good conductive material and has a cylindrical portion 2 for connecting a bare wire on one end side, a plurality of cuts 4 are formed on the wire insertion end side of the cylindrical portion 2 from the outer end side. The large-diameter cylindrical body 3 for inserting a covered electric wire is formed concentrically and integrally with the cylindrical portion 2.

<Function> Since the present invention has such a structure, the bare wire portion (k), which is obtained by peeling off the coating from the end of the covered wire (K) and making it a bare wire, is shown in Figure 3. As shown above, insert into the cylindrical part 2 from the outside of the cylindrical body 3, and at the same time insert the covering part c into the cylindrical body 3, pressurize the cylindrical part 2 as before, and forcefully clamp the electric wire part (k). In addition, by pressurizing the cylindrical body 3 part from the outer periphery and sandwiching the sheathing part (c) of the electric wire (K), the sheathing part (c) of the electric wire and the bare electric wire part (k) are pressed against the terminal 1. ) can be connected so that they do not move relative to each other.

<Examples> Examples of the present invention will be described below based on the drawings.

1 to 5 are diagrams showing a first embodiment of the present invention, in which a terminal 1 is molded from a copper plate, and a connecting portion 1a to various devices is connected to a round hole 1b at the tip of the terminal 1. This is an example of a plate formed into a round plate. The terminal 1 has a cylindrical part 2 for connecting an electric wire at one end of a round plate, and a large-diameter cylindrical body 3 for inserting a covered electric wire is concentric with the cylindrical part 2 and has a cylindrical body 3 for inserting a covered electric wire at the end thereof. It is integrally formed, and has a structure in which longitudinal groove-like cuts 4 are formed at four circumferential locations from the outer end of the cylindrical body 3.

Therefore, in this embodiment, the cylindrical portion 2 of the terminal 1
A covering tube 5 is sheathed around the cylindrical body 3 portion and further to the outside thereof. The covering tube 5 is a thinly colored transparent nylon product, and a hot melt layer 6 of polyamide material is adhered to the inner surface of the covering tube 5, so that it is formed into a substantially double tube shape.

The tube 5 is formed into a cylindrical shape with two stages of large and small concentric circles over the entire length, and the cylindrical part 2 of the terminal 1 is placed inside the small diameter part 5a at one end, and only the outer peripheral surface of the cylindrical part 2 is heated and shrunk to form a small diameter. The small diameter portion 5a is caused to shrink and change.
As shown in FIGS. 2 and 3, the cylindrical portion 2 of the terminal 1 is
The cylindrical body 3 of the terminal 1 is fitted and covered on the proximal end side of the large diameter portion 5b, and the large diameter portion 5b is further extended to a position outside the cylindrical body 3 of the terminal 1. It was formed so that the

Then, as shown in FIG. After inserting the bare wire part (k) into the cylindrical part 2 of the terminal 1 and positioning the end of the covered part (c) in the cylindrical body 3, as shown in FIG. As shown above, the outer periphery of the cylindrical portion 2 is compressed and deformed 7 using a pressure tool to clamp the bare wire portion (k), and then the outer periphery of the cylindrical body 3 is deformed 7 using a pressure tool. After applying pressure and deforming the wire to a small diameter and press-fitting it onto the covering part (c) of the electric wire (K), the large diameter part 5b of the tube 5 is heated as shown in FIG. 5 using a heating device such as a hot gun. Shrink and deform.

By this heating operation, the heat-melting layer 6 adhered to the inner surface of the heat-shrinkable tube 5 is melted, and due to the shrinkage pressure of the tube 5, the covering portion (c) of the electric wire (K) and the tube 5 are melted.
A portion remains between the two and a portion flows out to the outer surface to form a lump 6a.

In this way, between the end of the wire sheathing part (c) located in the tube 5 and the cylindrical part 2 and cylindrical body 3 of the terminal 1, a synthetic resin heat-shrinkable material is connected via the hot-melt resin layer 6. It is covered with a series of sex tubes 5 in a watertight manner.

The heat-shrinkable tube 5 is an injection-molded high-density polyethylene (HDPE) molded product with an enlarged diameter, and a polyamide heat-melting resin layer 6 is adhesively formed on the entire inner surface of the tube. Good too.

6 to 10 each show another embodiment of the terminal 1, and the one shown in FIG. 6 has one end for connecting an electric wire, like the terminal 1 shown in the first embodiment. A copper terminal 1 has a cylindrical part 2 and a cylindrical body 3 with a notch 4 on the outer end thereof is formed in series, and the tip connecting part 1a is formed in a circular shape. The one shown in FIG. 7 has a structure in which a notch 1b for connection to other equipment is formed for connection to other equipment, and the one shown in FIG. 3, the tip connecting portion 1a has a structure in which a notch 1b for connection to other equipment is formed from the tip side, and the overall shape is U-shaped.

What is shown in FIG. 8 is the tip connecting portion 1 of the terminal 1.
a is formed into a rod shape, and the other parts have the same structure as shown in FIGS. 6 and 7. In the case shown in FIG. 9, the tip connecting portion 1a of the terminal 1 is formed into a faston shape. , the cylindrical portion 2 and the cylindrical body 3 have the same structure as in each of the above embodiments. In the case shown in FIG. 10, the cylindrical portion 2 of the terminal 1 itself is long, and the wire (K) The bare wire part (k) is inserted from both the left and right ends to connect the two wires, and it has a notch 4 to accept the covered part (c) of the wire (K). This structure has large diameter portions 3, 3 on both left and right sides of the cylindrical portion 2. Further, a heat-shrinkable tube 5 having a heat-melting resin layer 6 on the inner surface is fitted so as to protrude slightly from the entire outer peripheral surface and both left and right ends.

As mentioned above, the structure of terminal 1 itself is as follows:
It is used by connecting the electric wires (K), and may be of a type in which the electric wires (K) are directly connected.

What is shown in FIGS. 11 and 12 is the terminal 1
This is an embodiment in which the number of cuts 4 formed in the cylinder body 3 having a large diameter is changed. , the same notches 4 are formed at three locations.

As mentioned above, the cuts 4 formed in the cylinder body 3 do not necessarily have to be four places, but may be formed in multiple places, and it is assumed that the cuts 4 are formed in five or six places. Good too. However, if the number of cuts 4 is too large, the width of the remaining wall of the cylindrical body 3 becomes too small, resulting in a disadvantage that the clamping force for the electric wire (K) is insufficient, so it is better not to make the number of cuts too large.

In the embodiments shown in FIGS. 13 and 14, the outer end of the cylindrical body 3 has been changed to have a large diameter, and in the embodiment shown in FIGS. The outer end of the shaft is shown as being gently sloped in an arc toward the axis so that the diameter is slightly smaller.
In the embodiment shown in FIG. 13, the outer end portion 3a of the cylinder 3 is bent inward along the inner surface of the cylinder 3, and in the example shown in FIG. It has a structure in which the outer end portion 3b of 3 is bent toward the small axis side. By doing so, the cylindrical body 3 acts as a resistor against the external pulling force of the electric wire (K) from outside.

The cylindrical body 3b referred to in the present invention may be implemented in this manner.

In addition, if the heat-shrinkable tube 5 described in the examples is made of a transparent or semi-transparent body, including the inner heat-melting layer 6, the insertion state of the electric wire into the internal terminal cylinder part 2, crimping or compression. It can be used conveniently as it allows you to see through the situation.
Further, if the tube is colored so that the color differs depending on the inner diameter size of the metal cylinder portion 2, it can be conveniently used without making mistakes in the size.

It goes without saying that the terminal 1 may be of a type that crimps the cylindrical portion 2 by applying pressure, or may be of a type that compresses the cylindrical portion 2 by applying pressure.

Although the embodiments considered to be representative of the present invention have been described above, the present invention is not necessarily limited to the structures of these embodiments. It can be implemented with appropriate modification within the scope of achieving the following effects.

<Effects of the invention> As is already clear from the above explanation, the invention has the following effects:
In a terminal for connecting an electric wire, a cylindrical body into which a wire sheath is inserted is formed concentrically and integrally with the cylindrical part outside the terminal cylindrical part for connecting the bare electric wire part, and this cylindrical body is formed integrally with the cylindrical part. Since a plurality of notches are formed in series from the outer end side, after the bare electric wire is connected under pressure at the terminal cylinder part, the cylinder body is deformed under pressure to crimp and clamp the covered part of the electric wire. By holding the bare wire portion and the sheathing portion of the wire in a series of postures in the terminal, local concentration of vibrations, external forces, etc. on the base end of the bare wire between the terminal tube portion and the wire sheathing end is prevented. This makes it possible to prevent intensive brittle deterioration caused by vibrations from equipment or external forces at the base end of bare wires, and to compensate for wire connection conditions that can withstand many years of use. has advantages. In addition, since a plurality of notches are formed in this cylinder from its outer end side, it has the advantage that it is easily deformed to a small diameter under pressure, and its outer end portion can be easily pressed against the sheathing part of the electric wire. .

[Brief explanation of the drawing]

1 to 5 show a first embodiment of the present invention, in which FIG. 1 is an overall perspective view, FIG. 2 is a longitudinal sectional view at the center, and FIGS. 3 to 5 show the process of use. All shown sequentially are central longitudinal sectional views, Figures 6 to 9.
The figure is an overall perspective view showing another embodiment of the terminal.
Figure 0 is a central vertical sectional view showing yet another embodiment, Figures 11 and 12 are rear views each showing another embodiment, and Figures 13 and 14 are center views showing still another embodiment. FIG. In the figure, 1 is a terminal, 2 is a cylindrical portion, 3 is a cylindrical body, and 4 is a notch.

Claims (1)

[Claims for Utility Model Registration] In a terminal 1 for connecting a wire, which is made of a highly conductive material such as copper or copper alloy, and has a cylindrical portion 2 for connecting a bare electric wire on one end side, the wire is inserted into the cylindrical portion 2. On the end side, there are multiple cuts 4 from the outer end side...
A wire connecting terminal in which a large-diameter cylindrical coated wire insertion tube 3 is formed concentrically and integrally with the tube portion 2. The electric wire connection terminal according to claim 1, wherein the forming material is a copper plate. The electric wire connection terminal according to claim 1, wherein the forming material is a brass plate. The electric wire connection terminal according to claim 1, wherein the notches 4 are provided at two locations in the circumferential direction of the cylindrical body 3. The electric wire connection terminal according to claim 1, wherein the notches 4 are provided at three locations in the circumferential direction of the cylindrical body 3. The electric wire connection terminal according to claim 1, wherein notches 4 are provided at four locations in the circumferential direction of the cylindrical body 3. The electric wire connection terminal according to claim 1, wherein the outer end portion of the cylindrical body 3 is folded back and bent inward of the cylindrical body. The electric wire connection terminal according to claim 1, wherein the outer end portion of the cylindrical body 3 is bent toward the axis of the cylindrical body. The electric wire connection terminal according to claim 1, wherein the outer end portion of the cylindrical body 3 is inclined toward the axis of the cylindrical body. The electric wire connection terminal according to claim 1, wherein the cylindrical portion 2 and the cylindrical body 3 have a series of insulating coatings on their outer peripheral surfaces.