JP3445959B2 - How to assemble the cable connection - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The method for assembling a cable connecting portion according to the present invention is a prefabricated linear connecting portion for connecting end portions of a transmission cable such as a CV cable used as an underground transmission line, or a straight connecting portion. The present invention relates to an improvement in a method of assembling a cable connecting portion called a prefabricated Y branch connecting portion.

[0002]

2. Description of the Related Art Conventionally, in order to connect end portions of a power transmission cable such as a CV cable which constitutes an underground power transmission line, FIG.
A prefabricated linear connection is used as shown in. 1
The end portions of the conductors 2 and 2 which compose the pair of CV cables 1 and 1 exposed from the insulating layers 3 and 3 are inserted into the conductor connectors 4 through the openings at both ends of the conductor connectors 4. ing. The conductor connector 4 is made of a relatively soft metal having a small electric resistance, such as a copper alloy, and has a substantially cylindrical shape as a whole. Such a conductor connector 4 is caulked toward the outer peripheral surfaces of the end portions of the conductors 2 and 2 with the end portions of the conductors 2 and 2 inserted from the openings at both ends thereof, and the conductors 2 and 2 are then attached. The ends of are connected to each other via the conductor connector 4.

A substantially annular conductor fixing tool 5 supported and fixed on the outer peripheral surface of the intermediate portion of the conductor connector 4 is embedded and supported on the inner peripheral surface of a cylindrical reinforcing insulator 6, such as an aluminum alloy. It is supported and fixed to the inner peripheral surface of the high-voltage shield electrode 7 which is made of metal and has a cylindrical shape. The reinforcing insulator 6 is held and fixed in a cylindrical case 8 that houses a cable connection portion (prefabricated linear connection portion). Therefore, the conductor connector 4 is fixed in the case 8 via the conductor fixture 5 and the reinforcing insulator 6, and is prevented from shifting in the axial direction. Also, in this state, the above-mentioned CV cables 1, 1
Premolded insulators 9 and 9 are inserted in the wedge-shaped gap between the outer peripheral surfaces of the end portions of the insulating layers 3 and 3 and the inner peripheral surface of the end portion of the reinforcing insulator 6. And spring 1
0 and 10, the premold insulators 9 and 9
Are elastically pushed into the inner part of the gap.

Inner peripheral surfaces of both ends of the reinforcing insulator 6 are tapered surfaces 11 on the inner diameter side which are inclined in a direction in which the diameter increases toward the end opening. Further, the outer peripheral surfaces of the front end portions of the premolded insulators 9 and 9 are inclined in the same direction as the inner diameter side tapered surfaces 11 and 11 by the same angle,
The outer diameter side tapered surfaces 12 and 12 are used. Further, the inner peripheral surface of each of the pre-molded insulators 9, 9 is a cylindrical surface which is in close contact with the outer peripheral surface of the insulating layers 3, 3 constituting each of the CV cables 1, 1. Therefore, each of the premolded insulators 9,
In the state where 9 is pushed into the reinforcing insulator 6, the outer peripheral surface of each of the premolded insulators 9 and 9 is the same as the inner peripheral surface of the reinforcing insulator 6, and each of the premolded insulators 9 is the same.
The inner peripheral surface of 9 is in close contact with the outer peripheral surfaces of the insulating layers 3 and 3, respectively.

In order to ensure the insulation of the prefabricated linear connecting portion as described above, the inner and outer peripheral surfaces of the premolded insulators 9 and 9 are connected to the outer peripheral surfaces of the insulating layers 3 and 3, respectively. It is necessary to surely make close contact with the inner peripheral surface of the reinforcing insulator 6. For this reason, the inner diameters of the inner peripheral surfaces 9a, 9a of the premolded insulators 9, 9 made of an elastic material such as rubber have been changed from the inner diameters of the outer peripheral surfaces 3 of the insulating layers 3, 3 so far.
It is made slightly smaller than the outer diameters of a and 3a. Therefore, the premolded insulators 9, 9 are covered with the insulating layers 3, 3 and the conductors 2 of the CV cables 1, 1 are covered.
When inserted from the tip of the exposed side of 2, the two peripheral surfaces 3a, 9a are in close contact with each other in a state where the premolded insulators 9, 9 are elastically expanded. Therefore, between the inner peripheral surfaces 9a, 9a of the pre-mold insulators 9, 9 and the outer peripheral surfaces 3a, 3a of the insulating layers 3, 3, elastic deformation of the pre-mold insulators 9, 9 is caused. A large friction force commensurate with As a result, each of these premolded insulators 9, 9
In order to push into the reinforcing insulator 6, a large force is required to exceed the frictional force.

For this reason, conventionally, as shown in FIGS. 10 to 11, the premolded insulators 9 and 9 have been pushed into the reinforcing insulator 6. That is, each CV cable 1,
With the pre-molded insulators 9 and 9 fitted onto the insulating layers 3 and 3 of 1 in advance, the end portions of the conductors 2 and 2 constituting the CV cables 1 and 1 are mutually connected by a conductor connector 4. After connecting, connect the conductor connector 4 to the reinforcing insulator 6
The conductor fixture 5 supports and fixes the central part of the inner surface of the high-voltage shield electrode 7 provided in the above. Next, in a state where the reinforcing insulator 6 is horizontally supported by a support table (not shown),
An adjustment operation is performed so that the center axis of the reinforcing insulator 6 and the center axes of the premolded insulators 9 and 9 coincide with each other. This adjustment work is performed by raising and lowering (moving up and down in FIGS. 10 to 11) supporting the portions of the CV cables 1 and 1 near the tip of the intermediate portion.
In addition, the adjustment is performed by the adjustment bases 13, 13 which are movable in the width direction (front and back directions in FIGS. 10 to 11).

Further, a pressing ring 14 is attached to the base end portion (the end portion on the opposite side of the reinforcing insulator 6) of each of the premolded insulators 9, 9. The pressing ring 14 has a split structure, and the premold insulators 9 and 9 are connected to the CV cables 1 and 1, respectively.
The CV cables 1 and 1 are detachably attached to the CV cables 1 and 1 while being externally fitted to the distal end portions of the. Such a pressing ring 14 is fixed to the upper end of the supporting leg 15, and the supporting leg 15 is movable in the axial direction of the reinforcing insulator 6 by a linear driving device such as a feed screw mechanism. Then, with the center axis of the reinforcing insulator 6 and the center axes of the pre-mold insulators 9, 9 aligned with each other, the support leg 15 is moved by the linear drive device.
The pressing ring 14 is moved toward the reinforcing insulator 6 from the state shown in FIG. 10 to the state shown in FIG. 11 via. As a result, each of the premolded insulators 9,
9 is pushed into the reinforcing insulator 6, and the outer diameter side taper surfaces 12 and 12 of the premold insulators 9 and 9 and the inner diameter side taper surfaces 11 and 11 of the reinforcing insulator 6 come into close contact with each other.
Each of the above-mentioned premolded insulators 9 in the reinforcing insulator 6,
The pushing work of 9 is carried out by each of these premolded insulators 9,
Do each 9 separately.

If the premolded insulators 9, 9 are pushed through the openings at both ends of the reinforced insulator 6 as described above, the pressing ring 14 and the supporting leg 15 are removed, and then the reinforced insulator is removed. At both ends of the body 6, the springs 10 and 10 are provided.
The covers 16 and 16 (FIG. 9) that cover the springs 10 and 10 are attached to complete the assembly work of the prefabricated linear connecting portion. After that, the inside of this prefabricated type straight connection is
Inspected by radiographing, the outer diameter side tapered surfaces 12, 12
It is inspected whether or not the inner diameter side tapered surfaces 11 and 11 are surely in close contact with each other. If these two tapered surfaces 11 and 12 are not in good contact with each other, sufficient insulation performance cannot be obtained. In that case, the prefabricated linear connection portion is disassembled and reassembly work is performed.

[0009]

The conventional method of assembling the cable connecting portion as described above has the following inconveniences. The adjustment work for aligning the central axis of the reinforcing insulator 6 with the central axis of each of the pre-molded insulators 9, 9 is troublesome. Outer diameter side tapered surfaces 12, 12 and inner diameter side tapered surfaces 11,
It is troublesome to confirm whether or not 11 and 11 are surely in close contact with each other.

That is, in the conventional case, the reinforcing insulator 6 is used.
The adjustment work for making the central axis of the above and the central axes of the premolded insulators 9 and 9 coincide with each other simply by adjusting the supporting position of the reinforcing insulator 6 without providing a member as a mark. The support position of each of the above pre-molded insulators 9, 9 is
This is done by adjusting the adjusting bases 13, 13. Therefore, the adjustment work is complicated as described above.

Further, since the above-mentioned confirmation work is carried out by X-ray photography, it is necessary to carry in and carry out the X-ray photography apparatus to a portion where a prefabricated linear connecting portion is installed, such as in an underground manhole. Also, since the film is developed after photographing and the suitability is judged, it is inevitable that the confirmation work takes time, and the above problems occur. The present invention has been made to realize a method for assembling a cable connecting portion without such inconvenience.

[0012]

The method for assembling the cable connecting portion of the present invention is similar to the above-described conventional method for assembling the cable connecting portion. First, a pair of conductors are covered with an insulating layer. The parts exposed from the insulating layer at the ends of the conductors that compose the cable are joined together through conductor connectors, and the ends of these cables and the periphery of the conductor connectors are cylindrical and the inner circumference of both ends is The surface is covered with a reinforcing insulator that is an inner diameter side tapered surface that is inclined in a direction in which the diameter increases toward the end opening. After that, at both ends of the reinforcing insulator, the outer peripheral surface is made an outer diameter side tapered surface inclined in the same direction as the inner diameter side tapered surface, and the inner peripheral surface is closely contacted with the outer peripheral surface of the insulating layer constituting the cable. Push the pre-molded insulator into a cylindrical surface.

In particular, in the method for assembling the cable connecting portion of the present invention as set forth in claim 1, the base end portions of the plurality of guide rods are arranged on the end faces of the reinforcing insulators, and the central axes of the respective guide rods are set to the respective center axes. Connect and fix in parallel with the central axis of the reinforced insulator. Along with this, a pressing force for pushing the premolded insulator into the reinforcing insulator in a portion closer to the center than a portion where the premolded insulator is externally fitted in a portion near the end of the intermediate portion of the insulating layer that constitutes the cable. Fit the ring .
Also, an outer end portion is formed on the outer peripheral surface of the outer half portion of the premolded insulator.
Formed in a state in which the outer diameter becomes smaller toward
Inclined in the same direction and at the same angle as the second taper surface on the outer diameter side.
, The inner peripheral surface of the pressing ring itself or the pressing ring
A second sleeve formed on the inner peripheral surface of the sleeve
Close the inner diameter side taper surface to the second outer diameter side taper surface
Then, the premolded insulator and the pressing ring are combined concentrically with each other. Then, by fitting a plurality of guide sleeves supported and fixed to the outer peripheral surface of the pressing ring onto the respective guide rods, the central axis of the reinforcing insulator and the central axis of the pre-molded insulator are aligned. State. Then, by moving the pressing ring toward the end surface of the reinforcing insulator, the pre-molded insulator is brought into contact with the inner diameter side tapered surface and the outer diameter side tapered surface in the reinforcing insulator. Push in.

More preferably, as described in claim 2, the pre-molded insulator is pushed into the reinforcing insulator until the inner diameter side tapered surface and the outer diameter side tapered surface come into contact with each other, and then the pressing ring is pressed. After the cable is removed from the periphery of the insulating layer, the measuring plate is placed around the insulating layer. Then, the guide rods are inserted into the plurality of positioning holes formed in the measurement plate, and one surface of the measurement plate is abutted against the outer end surface of the premolded insulator. Then, in this state, the positional relationship between the measuring plate and the reinforcing insulator is measured to determine whether or not the insertion amount of the premolded insulator with respect to the reinforcing insulator is appropriate.

[0015]

According to the method of assembling the cable connecting portion of the present invention constructed as described above, the assembling work can be facilitated, and the assembling work time and the assembling work cost can be shortened. First, in the case of the assembling method according to claim 1, the premolding is completed.
Combine the rim body and the pressing ring concentrically with each other, and
By externally fitting the guide sleeves, which are supported and fixed to the outer peripheral surface of the pressing ring, to the guide rods, the center axis of the reinforcing insulator and the center axis of the pre-mold insulator are made to coincide with each other. It will be easier to match. or,
In the case of the assembling method according to claim 2, since the positional relationship between the measuring plate and the reinforcing insulator is measured to determine whether the insertion amount of the premolded insulator with respect to the reinforcing insulator is appropriate, X It is not necessary to take a line image, and it is possible to reduce the time and labor required for this suitability determination.

[0016]

1 to 8 show an example of an embodiment of the present invention. In the following description, of the CV cables 1 and 1 provided in a pair, the pre-molded insulator 9 externally fitted to one CV cable 1 provided on the right side of FIGS.
A case where the reinforcing insulator 6 is pushed into one half (right half in FIGS. 1 and 6 to 8) will be described. The work of pushing the pre-molded insulator 9 externally fitted to the other CV cable 1 into the other half of the reinforcing insulator 6 (the left half of FIGS. 1 and 6 to 8) is performed in a similar manner after a while. To do.

First, with the pre-molded insulators 9, 9 preliminarily fitted onto the insulating layers 3, 3 of the pair of CV cables 1, 1, the conductors 2 constituting the two CV cables 1, 1 are preliminarily fitted. After connecting the two ends to each other with a conductor connector 4, the conductor connector 4 is attached to the center of the inner surface of the high-voltage shield electrode 7 provided in the center of the inner surface of the reinforcing insulator 6.
It is supported and fixed by the conductor fixture 5. Next, in a state where the reinforcing insulator 6 is horizontally supported by a support table (not shown), an adjusting operation for aligning the central axis of the reinforcing insulator 6 with the central axes of the premolded insulators 9 and 9 is performed. To do. This adjusting operation itself is the same as in the case of the above-mentioned conventional method, and ascends and descends (moves up and down in FIGS. 1 and 6 to 8) and the width direction (see FIG. 1) supporting the portions of the CV cables 1 and 1 near the tip of the intermediate portion. This is performed by means of movable adjustment bases 13 and 13 (movable in the front and back directions 1 and 6 to 8).

In particular, in the case of the assembling method of the present invention, prior to performing the above-mentioned adjustment work, a plurality of (in the example shown in the circumferential direction in the circumferential direction in the axial direction end surface of the reinforcing insulator 6 The four guide rods 17, 17 are connected at equal intervals with respect to each other. This connecting work is carried out by screwing the male screw portion provided at the base end portion of each of the guide rods 17 into the screw hole formed in the metal flange member 18 fixed to the end portion of the reinforcing insulator 6. Perform by tightening further. In this manner, with the base end portions of the guide rods 17, 17 joined to the axial end faces of the reinforcing insulators 6, the central axes of the guide rods 17, 17 are set to the reinforcing insulators 6.
Is parallel to the central axis of.

Further, the premolded insulator 9 is reinforced at a portion closer to the center than a portion where the premolded insulator 9 is externally fitted in a portion near the end of the intermediate portion of the insulating layer 3 which constitutes the CV cable 1. Press ring 1 for pushing into insulator 6
4 is fitted. As shown in detail in FIGS. 2 to 5, the pressing ring 14 includes a pair of elements 19 each formed in a semi-annular shape.
The both ends in the circumferential direction of 19 are joined by joining screws in a state of being abutted with each other to form the annular pressing ring 14. The pressing ring 14 as described above is used for the pre-mold insulator 9
Are concentrically combined with. That is, the inner peripheral surface of the pressing ring 14 itself or the inner peripheral surface of another sleeve 26 (FIGS. 1, 6 and 7) that is concentrically coupled to the pressing ring 14 is connected to the outside of the premolded insulator 9. A second inner diameter side taper surface formed on the outer peripheral surface of the half part, inclined in a direction in which the outer diameter decreases toward the outer end, and inclined in the same direction as the second outer diameter side taper surface 20 by the same angle. 21. The second outer diameter side taper surface 20 and the second inner diameter side taper surface 21 are brought into close contact with each other, and the pressing ring 14 and the premold insulator 9 are concentrically combined with each other.

Guide sleeves 23 and 23 are respectively attached to the support brackets 22 and 22 provided at a plurality of circumferential positions (four positions at equal intervals in the circumferential direction in the illustrated example) on the outer peripheral surface of the pressing ring 14 as described above. I support you. These guide sleeves 23, 23 include the guide rods 17,
Guide holes 24, 24 having an inner diameter capable of inserting 17 without rattling are provided with the central axes of the guide holes 24, 24 respectively.
It is provided in parallel with the central axis of. Such a pressing ring 14 is fixed to the upper end portion of the support leg 15, and the support leg 15 is moved by a linear driving device such as a feed screw mechanism.
It is movable in the axial direction of the reinforcing insulator 6.

If the above-mentioned guide rods 17 and 17 are mounted on the side of the reinforcing insulator 6 and the guide sleeves 23 and 23 are mounted on the side of the pre-molded insulator 9 as described above, respectively. As described above, the adjusting work is performed by the adjusting table 13 so that the central axis of the reinforcing insulator 6 and the central axis of the premold insulator 9 are aligned with each other. In this adjustment work, the tip end portions of the guide rods 17, 17 are still attached to the guide holes 24 of the guide sleeves 23, 23.
Before being inserted into 24, each of the guide rods 17, 1
7 is carried out in a state where the tip end portion of 7 is brought close to the open end portions of the guide holes 24, 24. Therefore, the above-mentioned adjustment work can be easily performed by using the guide rods 17, 17 and the guide holes 24, 24 as the guides so that the central axes of the guide rods 17, 17 coincide with each other.

If the center axis of the reinforcing insulator 6 and the center axis of the pre-mold insulator 9 are aligned in this way, the support leg 15 is moved by the linear drive device (not shown).
The pressing ring 14 is moved in the axial direction of the reinforcing insulator 6 in a direction of approaching the reinforcing insulator 6 via. With this movement, first, the guide rods 17, 17 are inserted into the guide holes 24, 24 as shown in FIG. When the pressing ring 14 is further moved toward the reinforcing insulator 6 from this state, the center axis of the reinforcing insulator 6 and the center axis of the premold insulator 9 are made to coincide with each other, and FIG. This premolded insulator 9 is pushed into the reinforcing insulator 6 as shown in FIG. Then, the outer diameter side tapered surface 12 of the premolded insulator 9 and the inner diameter side tapered surface 11 of the reinforcing insulating material 6 are in close contact with each other.

When the premolded insulator 9 is pushed in from the end opening of the reinforcing insulator 6 as described above, the pressing ring 14 and the support leg 15 are removed,
A determination work is performed to determine whether or not the insertion amount of the premolded insulator 9 into the reinforcing insulator 6 is appropriate. In order to perform this determination work, as shown in FIG. 8, first, the measuring plate 25 is arranged around the insulating layer 3 that constitutes the CV cable 1. The measuring plate 25 is formed by joining and fixing the pair of elements, each having a semi-circular shape, with the circumferential end surfaces of a pair of elements abutting each other to form a circular ring shape, with the elements being screwed together. Positioning holes through which the guide rods 17 and 17 can be inserted without rattling are formed in portions of the measuring plate 25 that are aligned with the guide rods 17 and 17.

Therefore, each of these guide rods 17, 17
Through one of these positioning holes, and one side of the measuring plate 25 (the left side of FIG. 8) is projected to the outer end surface of the pre-mold insulating body 9 (the right end surface of the right pre-mold insulating body 9 in FIG. 8). The measurement plate 25 in the state of being applied
And the positional relationship between the reinforcing insulator 6 and the above-mentioned reinforcing insulator 6 are measured. That is, the distance L between one side surface of the measuring plate 25 and the outer end surface of the flange member 18 fixed to the end portion of the reinforcing insulator 6 is measured. If the distance L is equal to or less than a predetermined value, the premolded insulator 9 is sufficiently inserted into the reinforcing insulator 6 so that the outer diameter side tapered surface 12 and the inner diameter side tapered surface 11 come into close contact with each other. It is determined that In this case, the measuring plate 25 and the guide rods 1 are
7 and 17 are removed and the work of assembling the spring 10 (FIG. 9) and the like is performed. On the other hand, when the distance L is larger than the predetermined value, the measuring plate 25 is removed, and the pre-molding insulator 9 is pushed in again by the pressing ring 14. In any case, the determination as to whether or not the premolded insulator 9 has been sufficiently pushed into the reinforcing insulator 6 can be made immediately without the need for complicated equipment such as an X-ray imaging apparatus. The determination work can be easily performed, and the work following the pushing of the pre-molded insulator 9 such as the assembly work of the spring 10 and the like can be performed immediately. Therefore, the assembly work of the prefabricated linear connecting portion can be efficiently performed.

Further, if necessary, the deviation between the center axis of the reinforcing insulator 6 and the center axis of the premold insulator 9 is measured. Such a deviation measuring operation is performed by measuring the radial distances R ₁ and R ₂ between the guide rods 17 and the outer peripheral surface of the insulating layer 3 of the CV cable 1 to which the premolded insulator 9 is fitted. Perform by measuring. When the difference between the radial distances R ₁ and R ₂ is equal to or less than a predetermined value, it is determined that the centers of the two match with each other to the extent that there is no practical problem, and the guide rods 17 and 17 are removed. ,
Assemble the spring 10 and the like. On the other hand, when the difference between the radial distances R ₁ and R ₂ is larger than the predetermined value, the pre-molding insulator 9 is pushed in again from the beginning.

[0026]

The method of assembling the cable connecting portion of the present invention is as follows.
Since it is constructed and operates as described above, the cost of installing the cable connection portion can be reduced by facilitating the assembly work of the cable connection portion such as the prefabricated linear connection portion and the prefabricated Y branch connection portion. Can be achieved.

[Brief description of drawings]

FIG. 1 is a schematic side view of a partially cut first stage of an assembly work, showing an example of an embodiment of the present invention.

FIG. 2 is a side view of a pressing ring and a movable leg that supports the pressing ring.

FIG. 3 is a diagram viewed from the left side of FIG.

FIG. 4 is a view seen from above in FIG.

FIG. 5 is a side view showing only the pressing ring.

FIG. 6 is a schematic side view with partial cutting showing a second stage of assembly work.

FIG. 7 is a partially cutaway schematic side view showing the third step.

FIG. 8 is a schematic partial side view showing a working state in which it is determined whether or not the pressing amount of the premolded insulator with respect to the reinforcing insulator is determined.

FIG. 9 is a cross-sectional view showing a general structure of a cable connecting portion assembled by the assembling method of the present invention.

FIG. 10 is a partially cutaway schematic side view showing a first stage of an assembly operation of a conventional structure.

FIG. 11 is a partially cutaway schematic side view showing the second step.

[Explanation of symbols]

1 CV cable 2 conductors 3 insulating layers 3a outer peripheral surface 4 conductor connector 5 conductor fixture 6 Reinforced insulator 7 High-voltage shield electrode 8 cases 9 Pre-molded insulator 9a Inner surface 10 springs 11 Tapered surface on inner diameter side 12 Outside diameter taper surface 13 Adjusting stand 14 Press ring 15 Support legs 16 covers 17 Guide rod 18 Flange member 19 elements 20 Second outer diameter taper surface 21 Second inner diameter side taper surface 22 Support bracket 23 Guide sleeve 24 Guide hole 25 Measuring Plate 26 sleeves

─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-8-251794 (JP, A) JP-A-5-328563 (JP, A) JP-A-7-255113 (JP, A) JP-A-11- 266523 (JP, A) Actual development 4-47324 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02G 15/08 H02G 1/14

Claims (2)

(57) [Claims] 1. A portion of a conductor, which constitutes a pair of cables, each of which is formed by covering a circumference of a conductor with an insulating layer, is connected with a portion exposed from the insulating layer via a conductor connector, and each of these portions is connected. After covering the end of the cable and the periphery of the conductor connector with a reinforcing insulator that is cylindrical and has an inner peripheral surface on both ends that is an inner diameter side taper surface that is inclined in a direction in which the diameter increases toward the end opening, At both ends of the reinforced insulator, its outer peripheral surface is an outer diameter side tapered surface inclined in the same direction as this inner diameter side tapered surface, and its inner peripheral surface is a cylindrical surface in close contact with the outer peripheral surface of the insulating layer constituting the cable. In the method of assembling the cable connecting portion for pushing the premolded insulator, the base end portions of the plurality of guide rods are attached to the end face of the reinforcing insulator, and the central axes of the guide rods are parallel to the central axis of the reinforcing insulator. Combined in the state In addition to fixing, for pushing the premolded insulator into the reinforcing insulator, in a portion closer to the center than a portion where the premolded insulator is externally fitted in a portion near the middle end of the insulating layer that constitutes the cable. Outer half of the premolded insulator with the pressing ring fitted
Inclined to the outer peripheral surface in a direction in which the outer diameter decreases toward the outer end
In the same direction as the second outer diameter taper surface
In the state of being inclined at an angle, the inner peripheral surface of the pressing ring itself or
On the inner peripheral surface of the sleeve that is concentrically connected to this pressing ring,
The formed second taper surface on the inner diameter side is replaced with the second taper on the outer diameter side.
By closely fitting the premolded insulator and the pressing ring to each other in close contact with the upper surface, and by externally fitting a plurality of guide sleeves supported and fixed to the outer peripheral surface of the pressing ring to the respective guide rods, With the central axis of the reinforcing insulator and the central axis of the premolded insulator aligned with each other, the pressing ring is moved toward the end surface of the reinforcing insulator to reinforce the premolded insulator. A method for assembling a cable connecting portion, characterized in that the inner diameter side tapered surface and the outer diameter side tapered surface are pushed into the insulator until they come into contact with each other. 2. A premolded insulator in a reinforced insulator,
After pushing the inner diameter side taper surface and the outer diameter side taper surface into contact with each other, after removing the pressing ring from the periphery of the insulating layer constituting the cable, arrange the measuring plate around the insulating layer, Each guide rod is inserted through a plurality of positioning holes formed in the measurement plate, and one side of the measurement plate is abutted against the outer end surface of the premolded insulator, and the measurement plate and the reinforced insulation. The method for assembling a cable connecting portion according to claim 1, wherein the positional relationship with the body is measured to determine whether or not the insertion amount of the premolded insulator with respect to the reinforcing insulator is appropriate.