JPH0622935Y2 - Solderless grounding member - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a solderless grounding member that enables a simple grounding work without requiring a soldering work.

(Technical background of the invention and its problems) At the end of the power cable or communication cable, it is necessary to ground the outer conductor of the cable by some means.
The outer conductor of the cable is usually formed of copper tape or aluminum tape, and it is necessary to electrically connect a lead wire to these in order to ground it.

The following solderless grounding work has been conventionally developed, which can easily perform this lead wire connecting work without soldering work.

FIG. 5 is a perspective view of a cable terminal portion using a conventional solderless grounding member.

In the figure, a cable 1 has a structure in which an outer periphery of an insulator 2 is covered with a semiconductive layer 3, an outer conductor 4, and a sheath 5 in this order.

In order to ground the outer conductor 4, first, one end of a lead wire 6 made of a braided wire or the like is brought into contact with the outer circumference of the outer conductor and is vertically attached. Then, the band-shaped elastic member 7 previously wound in a spiral shape is wound around the outer circumference. If you do this,
Due to the tightening force of the strip-shaped elastic member 7, the lead wire 6 is pressed against the outer conductor 4 to be electrically connected. The grounding work is completed by grounding the other end of the lead wire 6 to a ground terminal (not shown).

Such a construction method has an advantage that it does not require a relatively skillful soldering work in the field and can be easily applied to cables of various sizes, but has the following drawbacks.

First, as shown in the figure, the band-shaped elastic member 7 wound in a mainspring shape in advance has a problem that it is difficult to raise the tip 7a at the beginning of winding. In addition, there is a risk that the edge of the belt-shaped elastic member 7 may be injured when raising this portion. Further, the end portion 7a of the strip-shaped elastic member 7 is a portion which is first wound around the outer conductor 4 of the cable 1 as shown in the drawing, but the outer conductor 4 may be damaged because the edge portion is hard. Further, the belt-shaped elastic member 7 is
After the construction, the outer conductor 4 of the cable 1 is tightly wrapped around the outer periphery of the outer conductor 4. However, for example, when the outer conductor 4 of the cable 1 is thermally expanded or contracted, the strip-shaped elastic member 7 bites into the outer conductor 4, or There was also a risk of causing wrinkles and breaks in No. 4.

(Purpose of the Invention) The present invention has been made in view of the above points, and an object thereof is to provide a solderless grounding member that has good workability and does not cause scratches or the like on the outer conductor of the cable. Is.

(Summary of the Invention) The solder-les grounding member of the present invention has a flexible band-shaped conductor having one end to which a grounding lead wire is connected and fixed, and one end fixed to the other end of the band-shaped conductor and wound in a mainspring shape. The strip-shaped elastic member comprises a strip-shaped elastic member, and the strip-shaped elastic member is wound around the outer conductor of the cable so as to surround the strip-shaped conductor and the lead wire.

(Embodiment of the Invention) FIG. 1 is a perspective view of a solderless grounding member and a cable end portion showing an embodiment of the present invention.

In the figure, this solderless grounding member includes a flexible strip conductor 11 having a grounding lead wire 10 connected and fixed at one end,
One end of the strip-shaped conductor 11 is fixed to the other end of the strip-shaped conductor 11, and the strip-shaped conductor 11 is composed of a strip-shaped elastic member 12 wound in a spiral shape.

As the grounding lead wire 10, a bare annealed copper wire, a copper wire provided with vinyl insulation, or a braided wire is used.
Further, for the flexible strip-shaped conductor 11, a copper tape, an aluminum tape, a braided wire formed to have the same width as the strip-shaped elastic member 12, or the like is used.

The strip-shaped elastic member 12 may be the same as that used in the related art for solderless grounding, which has already been described in FIG. The cable 1 to which this is applied has, for example, a structure in which the semiconductive layer 3, the shielding copper tape 4, and the sheath 5 are provided on the outer periphery of the insulator 2 similarly to the one described in FIG. here,
The sheath 5 is cut off so that the shielding copper tape 4 is exposed by a predetermined width required for grounding work.

In the construction, first, as shown in FIG. 1, the end portion of the grounding lead wire 10 is positioned on the outer circumference of the outer conductor 4, and the flexible belt-shaped conductor 11 is wound around substantially the entire circumference of the outer conductor 4, and The belt-shaped elastic member 12 is wound around the outer circumference.

Figure 2 shows the cable after construction.

As shown in FIG. 2, after the solderless grounding member is attached, the strip-shaped conductor 11 is formed on the outer circumference of the outer conductor 4 of the cable 1.
The strip-shaped elastic member 12 and the lead wire 10
It is wound so as to surround.

By doing so, first, the grounding lead wire 1
One end of 0 is strongly pressed against the outer circumference of the outer conductor 4 by the winding force of the strip-shaped elastic member 12, and a solderless electrical connection can be performed.

In addition, when starting the construction work, as shown in FIG.
Since the grounding lead wire 10 is connected to the tip end portion of the strip-shaped elastic member 12 via the flexible strip-shaped conductor 11, the work of raising the winding start end of the strip-shaped elastic member 12 is performed by the conventional method shown in FIG. It's much easier than anything. Therefore,
The workability of the entire winding work is improved.

If the braided wire 11 is made of a good electric conductor and is electrically connected to the grounding lead wire 10 by soldering or the like, when the strip-shaped conductor 11 is wound around the outer conductor 4, it is grounded. The contact resistance between the lead wire 10 and the outer conductor 4 can be made sufficiently low. Furthermore, if the strip-shaped conductor 11 is selected to have a length that is equal to or longer than the entire circumference of the outer conductor 4, the strip-shaped elastic member 12 does not directly contact the outer conductor 4.

As a result, the tightening force of the band-shaped elastic member 12 is not directly applied to the outer conductor 4, and the band-shaped conductor 11 serves as a cushion layer for protecting the outer conductor 4, causing scratches or wrinkles. Can be prevented. Further, by completely covering the end of the band-shaped elastic member 12 with the band-shaped conductor 11, it is possible to prevent accidents such as finger injury or damage to the outer conductor 4 due to the end of the band-shaped elastic member 12. it can.

The connection between the strip-shaped conductor 11 and the strip-shaped elastic member 12 is
It can be realized by using various fixing means such as soldering work, caulking work, or bonding work.

The solderless grounding member of the present invention is not limited to the above embodiments.

A modified example thereof is illustrated in FIGS. 3 and 4.

First, FIG. 3 shows a case where a bare tinned annealed copper wire or the like is used for the grounding lead wire 10, and a waterproof resin tape is wound around the middle portion of the grounding lead wire 10. That is, normally, one end of the grounding lead wire 10 is electrically connected to a grounding terminal (not shown), but when water penetrates between the strip-shaped elastic member 12 and the outer conductor 4 along the grounding lead wire, the Corrosion of parts causes various problems. Therefore, if a waterproof resin tape for preventing the infiltration of water is wound around the grounding lead wire 10 in advance, the work of attaching the lead wire on site is further simplified.

FIG. 4 shows the structure when the grounding lead wire 10 is a braided wire for the same purpose.

That is, in this case, the intermediate portion of the grounding lead wire 10 is impregnated with the resin 14 for preventing water running. This resin has
For example, silicone resin, vinyl chloride resin, or other soft and sufficiently moisture-proof resin may be used.

(Effect of the Invention) According to the solderless grounding member of the present invention described above,
Since the grounding lead wire is connected to the end of the band-shaped elastic member via the flexible band-shaped conductor, it is easy to work the end of the band-shaped elastic member when winding it around the outer conductor of the cable. Alternatively, after winding, the belt-shaped elastic member comes into direct contact with the outer conductor of the cable, which effectively prevents accidents such as scratching or wrinkling.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a solderless grounding member of the present invention, FIG. 2 is a perspective view showing a mounting state of the member to a cable, and FIGS. 3 and 4 are solderless grounding members of the present invention, respectively. And FIG. 5 is a perspective view of a cable end for explaining a conventional solderless grounding method. 1 ... Cable, 2 ... Insulator, 3 ... Semi-conductive layer, 4 ... Outer conductor, 5 ... Sheath, 10 ... Ground lead wire, 11 ... Band conductor, 12 ... Band elastic member.

Claims (1)

[Scope of utility model registration request] 1. A flexible band-shaped conductor having a grounding lead wire connected and fixed to one end, and a band-shaped elastic member having one end fixed to the other end of the band-shaped conductor and wound in a spiral shape.
A solderless grounding member, characterized in that the strip-shaped elastic member is wound around the outer conductor of the cable around the strip-shaped conductor so as to surround the strip-shaped elastic member and the lead wire.