JPH0851717A - Outdoor cable head - Google Patents

Abstract

PURPOSE:To obtain an outdoor cable head which can be fixed in an arbitrary attitude, while reducing the weight, by employing an epoxy unit, embedded with a conductive rod to be inserted with the conductor part at the stepwise stripped end part of a cable, as the main body of a bushing and making it possible to replace a finned bushing made of rubber or plastic on the surface of the epoxy unit. CONSTITUTION:A stress cone 16 is mounted onto an insulator part 15a where a cable 15 is stripped stepwise and a wedge metal 17 is press fitted to a conductor part 15b. A bushing corresponding to a terminal part 15E stripped stepwise principally comprises an epoxy unit 19 embedded with a conductive rod 18 and applied with a finned bushing 20 made of rubber. The epoxy unit 19 has tapered outer circumferential surface which is fitted tightly with the inner circumferential surface of the tinned bushing 20. It is secured, at the upper end thereof, to the conductive rod 18 through a bolt 21 and, at the lower end thereof, to a flange 23 through a bolt 22. This structure reduces the weight and facilitates the replacement of bushing while allowing a cable head to be set obliquely, horizontally or downward.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a cable head for a power cable, and more particularly to an outdoor cable head.

[0002]

2. Description of the Related Art FIG. 2 shows an example of a conventional outdoor cable head of this type. For a cable 1, for example, a sheath, an insulator and the like are stripped off at a terminal portion raised as shown in FIG. The stress cone 2 is mounted on the exposed insulator 1a, and the wedge-shaped connecting conductor 3 is crimped and fixed to the conductor portion 1b. The step stripping end portion 1E thus terminated is made of a porcelain insulator tube. 4, the wedge-shaped connecting conductor 3 is taper-fitted in a suspended state in the tapered tubular portion 5a of the upper metal fitting 5 arranged on the upper end side of the insulator tube 4, and the wedge tightening metal fitting 6
It is firmly fixed by. Reference numeral 7 denotes a head metal fitting, which is fixed to the insulator tube 4 together with the upper metal fitting 5 by bolts 8. On the other hand, a fluid insulating compound 9 is filled between the step stripping terminal portion 1E and the insulator tube 4, and the stress cone 2 described above is intervened at the lower end side of the insulator tube 4,
The stress cone compression device 10 is applied from the lower side thereof, and the fastening metal fitting 11 supporting the device 10 is fastened to the flange portion of the lower end side of the insulator tube 4 with the bolts 12, so that the stress cone 2 is attached to the porcelain insulator tube 4 The inner surface of the taper is adhered in a compressed state.

[0003]

As described above, the structure is such that the step stripping end of the cable is directly inserted into the porcelain tube, and a fluid insulating compound is filled between the cable and the insulator tube. Therefore, when a porcelain insulator tube, which is weak against impact force, is damaged or the like, and the insulator tube is replaced, it is necessary to disassemble the entire cable head once, replace the insulator tube, and then reassemble. Since the fluid insulating compound is filled inside, the cable head cannot be used in an environment where the cable head is inclined, horizontal, or rotating. Had the problem.

Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, simplify the replacement of the insulator tube,
Allows use in horizontal or reverse orientation,
To provide an outdoor cable head.

[0005]

SUMMARY OF THE INVENTION An outdoor cable head provided by the present invention is an epoxy unit in which a conductive rod into which a conductor portion of a cable stripping end portion can be inserted is embedded and which serves as a main body of an insulator tube. A rubber / plastic pleated sleeve is replaceably attached to the surface of the epoxy unit.

In a preferred embodiment, the outer peripheral surface of the epoxy unit and the inner peripheral surface of the pleated sleeve are taper-fitted,
The upper and lower ends of the pleated sleeve are bolted and fixed to the important points of the epoxy unit. In addition, a wedge metal fitting is crimped on the conductor portion of the cable stripping end portion, and a stress cone is attached on the insulator portion of the terminal portion, and the wedge metal fitting is attached to the conductive rod in the epoxy unit. In addition to being press-fitted into the inside, the stress cone is brought into close contact with the inner surface of the epoxy unit in a compressed state.

[0007]

[Function] Unlike the porcelain insulator tube, the conductive rod-embedded epoxy unit is substantially solid, and the surface of the epoxy unit is rubbed with a rubber / plastic foldable tube and is replaceably attached. The cable head structure having the desired high insulation performance can be reproduced only by replacing the pleated sleeve.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a preferred embodiment of an outdoor cable head according to the present invention.
Has stripped off the sheath and insulator as before,
In addition, the insulator portion 15 exposed by the step stripping
The stress cone 16 is mounted on a and the conductor portion 15b
A wedge metal fitting 17 is crimped and fixed on the top. The configuration of the insulator tube corresponding to the step stripping terminal portion 15E thus configured is as follows.
An epoxy unit 19 in which a conductive rod 18 is embedded is mainly used, and a rubber foldable sleeve 20 is attached to the surface of the epoxy unit 19. The outer peripheral surface of the epoxy unit 18 has a taper that widens toward the end.
The inner peripheral surface of is also given a taper that spreads toward the end. Thus, the pleated sleeve 20 has a taper fitting on the outer peripheral surface of the epoxy unit by its inner peripheral surface, and is further bolted at the upper and lower ends with bolts 21 and 22. The bolt 21 on the upper end side is screwed into the screw hole of the embedded conductive rod 18, and the bolt 22 on the lower end side is
Is screwed into the screw hole of the flange 23 which is integrally embedded in the lower end of the epoxy unit. Therefore, both bolts are tightened at the important points of the epoxy unit 19,
Therefore, the pleated sleeve 20 is fixed to the epoxy unit 19.

The step stripping terminal portion 1E of the cable terminated as described above is inserted from the lower hole of the epoxy unit 19, and the wedge metal fitting 17 of the conductor portion, which is the upper end in the drawing, is a conductive rod. The conductor portion 15b and the conductive rod 18 are electrically connected by being press-fitted into the lower tapered hole portion. Two
Reference numeral 4 denotes a wedge tightening fitting, which is mounted on the conductor portion 15b. With the above electrical connection, the stress cone 16 is inserted into the lower tapered hole of the epoxy unit, and the stress cone compression device 25 is applied from the lower side of the stress cone 16, and the compression device 25 is applied. By tightening and fixing the tightening metal fitting 26 supporting the bolt to the flange 23 on the epoxy unit side with the bolt 27, the stress cone 16 is brought into close contact with the taper surface of the taper hole of the epoxy unit in a compressed state, and thus desired electrical characteristics are obtained. Is obtained.

In the above-mentioned embodiment, the pleated sleeve 20 is provided.
Although it is made of rubber, it is not limited thereto and may be made of plastic. Further, the method of fixing the foldd sleeve 20 is as follows.
Not only the above-mentioned bolt tightening, other disassembling fixing means, for example, the inner peripheral surface of the pleated sleeve and the outer peripheral surface of the epoxy unit are provided with a protrusion on one side and a groove on the other side, and these protrusions and grooves It is also possible to use the above-mentioned fitting.

[0011]

According to the outdoor cable head of the present invention as described above, the epoxy unit, which is the main body of the insulator tube, is of a solid type having a conductive rod embedded structure, and the replacement target is the adherend side. Since it is made of a rubber / plastic pleated tube, replacement of the insulator tube can be simplified. In addition, since it is not necessary to use a fluid compound, it can be used in an environment where it is slanted, horizontally or reversed, and therefore, the intended purpose can be sufficiently achieved. . Moreover, since the epoxy unit and the pleated sleeve made of rubber / plastic are used instead of the porcelain insulator tube, the weight can be reduced, the impact is strong, and the handling is easy.

[Brief description of drawings]

FIG. 1 is a sectional explanatory view showing an embodiment of an outdoor cable head according to the present invention.

FIG. 2 is a cross-sectional explanatory view showing an example of a conventional outdoor cable head.

[Explanation of symbols]

 15 Cable 15E Step Stripping Terminal 15a Insulator 15b Conductor 16 Stress Cone 17 Wedge Metal 18 Conductive Rod 19 Epoxy Unit 20 Rubber Folding Tube 21,22 Bolt 25 Stress Cone Tightening Device 26 Tightening Metal 27 Bolt

Claims (3)

[Claims] 1. An epoxy unit in which a conductive rod into which a conductor portion can be inserted at a stripped end portion of a cable is embedded is used as a main body of an insulator tube, and the surface of the epoxy unit is provided with a rubber / plastic pleated sleeve. An outdoor cable head characterized in that the pipe is attached in a replaceable manner. 2. The outer peripheral surface of the epoxy unit and the inner peripheral surface of the pleated trocar are taper-fitted, and the upper and lower ends of the pleated trocar are bolted and fixed to the important points of the epoxy unit. The outdoor cable head according to claim 1. 3. A wedge metal fitting is crimped on a conductor portion of a cable stripping terminal portion, and a stress cone is mounted on an insulating material portion of the terminal portion. 2. The outdoor cable head according to claim 1, wherein the stress cone is press-fitted into the conductive rod and is closely attached to the inner surface of the epoxy unit in a compressed state.