JPH09247838A - Cable prefabricated type connection - Google Patents

Abstract

It is an object of the present invention to provide a cable prefabricated type connecting portion having a novel structure capable of significantly shortening the assembling time without interrupting the assembling work of the prefabricated connecting portion of the CV cable. And SOLUTION: An insulating molded body mounted so as to surround a connecting portion of a cable conductor, and a pre-molded insulation fitted into an insulating body covered with the cable conductor and pressed against the insulating molded body for reinforcing insulation. In a cable prefabricated connection comprising a body, a compression device pushing the premolded insulator, and a stopper sandwiched under the insulating molded body on an outer peripheral surface of an end portion of the cable insulator, the stopper and The compression device has a structure in which the compression device is divided into two in advance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a cable prefabricated type connecting portion used in a prefabricated type straight connecting box for CV cables.

[0002]

2. Description of the Related Art CV cable connection work requires reliability for maintaining high quality and completion in the shortest possible time.

For this reason, a prefabricated joint construction method is employed in which the respective cable connecting portions are preassembled at the factory and the construction is completed on the site by a simple mounting operation.

FIG. 8 shows a vertical cross-sectional view of a conventional cable straight connecting portion adopting such a prefabricated joint method. In the figure, in the cable 10, the insulator 12 is peeled off for a predetermined length to expose the conductor 11. This conductor 11 is connected to the other cable conductor 11 and a conductor connecting pipe (compression sleeve) 1
3 are connected. The insulating molded body 14 having the internal shielding metal member 15 therein corresponding to the central portion of the conductor connecting portion,
It is arranged so as to surround the conductor connecting portion, and the inner surface of the inner shielding metal member 15 is fixed to the outer peripheral central portion of the conductor connecting pipe (compression sleeve) 13. In addition, the pre-molded insulators 16 and 16 are inserted into the taper portions on both sides of the insulating molded body 14 in a gap formed between the insulating molded body 14 and the cable, and these three insulators are combined, It forms a prefabricated connection.

Further, the pre-molded insulating body 16 fitted in the insulating molded body 14 is pressed against the insulating molded body 14 by the pressing member 17 and the spring unit 18,
The pre-molded insulation 16 and the insulating molded body 14 or the pre-molded insulation 16 and the cable insulating body 12 are configured so as to have a certain insulation characteristic or more.

Further, a ring-shaped stopper 20 is provided on the outer peripheral surface of the end portion of the cable insulator 12 and sandwiched under the insulating molded body 14. This stopper 20 prevents the pre-molded insulator 16 from coming closer to the inner shielding metal member 15 than necessary due to the pressing force.

Reference numeral 19 denotes an intermediate junction box body case.

[0008]

When the conductor connecting pipe (compression sleeve) 13 is compressed in the prefabricated connection portion as shown in FIG. 8, as shown in FIG. 6, the stopper 20 and the premolded insulator are provided. 16 was moved to a position where it did not hinder the compression work. Therefore, since the cable insulator 12 is moved on the cable insulator 12 that affects the electrical characteristics, the cable insulator 12 may be damaged when the hard stopper 20 made of FRP or metal is moved. Work such as covering the insulator 12 was performed.

[0009] Such protection work is inefficient because it interrupts the prefabricated assembly work.

Further, since the stopper 20 has a ring shape, if the insertion is forgotten, the disassembling and reconnecting work such as cutting the conductor connecting pipe 13 must be performed.

Another problem is that the pressing metal fitting 1 used when the premolded insulator 16 is fitted into the insulating molded body 14 in the prefabricated connection portion as shown in FIG.
Since the compression device composed of 7 and the spring unit 18 has a cylindrical shape, it was inserted into the cable side in advance before the conductor connection pipe 13 was compressed. Therefore, it is necessary to protect the cable side because it may damage the cable side during insertion.

Further, as shown in FIG. 7, when the cable insulator 12 between the cable outer semiconductive layer 12a and the semiconductive layer portion 16a of the premolded insulator 16 is shielded, the compression device 30 is subjected to the above shielding treatment. Inevitably, the semi-conductive layer 12b was formed by manually winding the semi-conductive tape while moving the compression device 30 in the shielding process.

Therefore, the prefab assembly work was interrupted to protect the cable side before inserting the compression device 30.
Further, the shielding process work while moving the compression device 30 was very troublesome.

The present invention has been made in view of the above points, and provides a cable prefabricated type connecting portion having a novel structure capable of significantly shortening the assembly time without interrupting the assembly work of the prefabricated connection. The purpose is to do.

[0015]

SUMMARY OF THE INVENTION One means of the present invention is
An insulating molded body mounted so as to surround the connection portion of the cable conductor, and a pre-molded insulating body fitted into the insulating body covered with the cable conductor and pressed against both ends of the insulating molded body for reinforcing insulation. , In a cable prefabricated connection provided with a compression device for pushing the premolded insulator and a stopper sandwiched under the insulating molded body on an outer peripheral surface of an end portion of the cable insulator, the stopper is longitudinally cut in advance. It is characterized in that the structure is divided into two in the direction.

According to another aspect of the present invention, in the above-mentioned cable prefabricated type connecting portion, the compression device comprises a spring, a guide bolt, a spring support plate and a push fitting, and the spring support plate and the push fitting are provided. It is characterized in that the structure is divided into two in advance.

With the above structure, the stopper can be mounted in the regular position after the conductor connecting pipe is compressed, that is, after the cable conductor is connected. Also, the compression device can be installed after the cable insulation shielding treatment after connecting the cable conductors.

It goes without saying that the present invention also applies to the terminal connection. In that case, the conductor connecting pipe becomes a conductor pull-out rod, and the pre-molded insulator and the compression device are only one on one side.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail with reference to the drawings. FIG. 1 shows an example of an embodiment according to claim 1 of the present invention, and the figure shows a stopper 20. This stopper 20 is made of metal and is divided into two semicircular shapes (20a, 2
0b). The semicircular body 20a on one side is provided with a recess 29 for inserting the bolt 29, and the semicircular body 20b on the other side is provided with a fitting screw hole 23 for the bolt 29. In addition, the semicircular bodies 20a and 20b are provided with holes 27 that engage with the knock pins 25 to prevent misalignment during integration.

As shown in FIG. 2, the stopper 20 having the above-described structure is compressed and connected to the cable conductors 11 by the conductor connecting pipe 13 and then assembled and integrated on the conductor connecting pipe 13 (see FIG. 1C). Then, move the stopper to the proper position and install it.

Therefore, since there is no fear of damaging the cable insulator 12 which affects the electrical characteristics, the work of protecting the cable insulator can be omitted.

Next, an example of an embodiment according to claim 2 of the present invention will be described with reference to FIGS. FIG. 5 shows the compression device 3.
FIG. 3 shows a push fitting 31 of the compression device 30, and FIG. 4 shows a spring support plate 37 of the compression device 30. In FIG. 3, the push metal fittings 31 are 31a and 3a.
1b is divided into two parts, and a recess 32 for inserting a bolt 35 is provided on the side of 31a, and a bolt through hole 33 is provided. Further, a knock pin and a hole 34 are provided on both sides in order to prevent a deviation at the time of integration. It should be noted that the bolt through hole on the side of 31b may also be recessed so that the nut can be screwed into the bolt there. As a result, the integration can be made stronger.

Reference numeral 372 is a screw hole of a spring guide bolt.

Next, the spring support plate will be described. In FIG. 4, two sets of spring support plates 37 are provided. One set of support plates is divided into two parts 37a and 37b, and another set of support plates is provided. The plate is divided into two parts 37c and 37d. Each support plate (37a-37d) has through holes 37 for spring guide bolts at equal intervals on the same circumference.
1, a support plate fixing bolt through hole (the support plates of 37a and 37b are bolt tap holes) 372 and a stud bolt through hole 373 are provided. When the two sets of spring support plates are integrated, they are fixed by bolts through the lap fixing bolt through holes 372 so that their cut surfaces are orthogonal to each other.

As shown in FIG. 5, the pressing member 31 and the spring support plate 37 having the above-described structure are assembled into two parts, which are shielded after the cable insulator 12 is shielded.
The compression device 30 divided into two is integrated on b, and then mounted in a predetermined place of the connection box.

Therefore, since the compression device is not inserted into the cable before connecting the cable conductor, there is no fear of damaging the cable insulator 12 and the outer semiconductive layer 12b, and the conventional protection work on the cable side is performed. Omitted. Moreover, since the compression device can be mounted after the shielding treatment of the cable insulator 12, the shielding treatment work becomes easy.

[0027]

As described above, the cable prefabricated type connecting portion of the present invention has the following effects.

There is no damage to the cable insulator that affects the electrical characteristics of the connection. As a result of the above, the work of protecting the cable side is omitted.

Even when the conductor is connected without forgetting to insert the stopper, the conductor connecting pipe can be attached without cutting.

It becomes easier to shield the cable insulator,
Work time can be shortened.

[Brief description of drawings]

FIG. 1 shows a stopper relating to a cable prefabricated type connection portion of the present invention, (a) is a front explanatory view before assembly, (b) is a side view, and (c) is a front explanatory view after assembly. Is.

FIG. 2 is a longitudinal sectional view of a main part for explaining a state in which a stopper according to the present invention is mounted.

3A and 3B are views showing a pressing metal fitting of a compression device relating to a cable prefabricated type connection portion of the present invention, in which FIG. 3A is a side view (partially sectional view) and FIG.

FIG. 4 is a perspective view of a spring support plate of a compression device relating to the cable prefabricated type connection part of the present invention.

FIG. 5 is a diagram illustrating a state in which the compression device related to the cable prefabricated type connection portion of the present invention is mounted.

FIG. 6 is a diagram illustrating a state in which a conventional stopper is attached.

FIG. 7 is a diagram illustrating a state in which a conventional compression device is mounted.

FIG. 8 is a vertical sectional view showing a conventional cable prefabricated type connection portion.

[Explanation of symbols]

 10 Cable 11 Cable Conductor 12 Cable Insulator 13 Conductor Connection Tube 14 Insulation Molded Body 16 Pre-molded Insulator 17,31 Pushing Metal Fitting 18 Spring Unit 20 Stopper 30 Compressor 37 Spring Support Plate

Claims (2)

[Claims] 1. An insulating molded body mounted so as to surround a connecting portion of a cable conductor, and an insulating molded body which is fitted into an insulating body coated with the cable conductor and is pressed against both ends of the insulating molded body to perform insulation reinforcement. In a cable prefabricated connection portion comprising a premolded insulator, a compression device pushing the premolded insulator, and an end outer peripheral surface of the cable insulator, a stopper sandwiched under the insulating molded body, The cable prefabricated type connecting portion, wherein the stopper has a structure which is previously divided into two in the longitudinal direction. 2. The cable prefabricated type connection part according to claim 1, wherein the compression device is composed of a spring, a guide bolt, a spring support plate and a push fitting, and the spring support plate and the push fitting are divided into two in advance. Cable prefabricated type connection part characterized by a different structure.