JPH11266523A - Cable falling-off preventing device of prefabricated joint for cv cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate an assembly work, reduce axial direction dimension, prevent insulation defects, and facilitate a dismantling work. SOLUTION: The end of a conductor 11 of which a CV cable 1 is composed is electrically connected to a conductor connector 9 via a connection sleeve 16a. A retainer 37 and a retaining recess 45 are retained with each other, while the connection sleeve 16a is inserted into a connection recess 10a of the conductor connector 9 to prevent the connection sleeve 16a from falling off. In order to release the retainer 37 and the retaining recess 45 from retention, the pressed plane 43 of the retainer 37 is pressed by a pressing pin 47.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-voltage CV cable (CV cable) used as an underground power transmission line.
The present invention relates to an improvement of a prefabricated connecting portion for connecting end portions of the prefabricated type.

[0002]

2. Description of the Related Art Conventionally, a prefabricated connection as shown in FIG. 3 has been used to connect ends of CV cables constituting an underground power transmission line. The prefabricated connection shown in FIG. 3 converts one CV cable 1 into two CV cables 1, 1 (or conversely, two CV cables 1, 1 into one CV cable 1). This shows a structure called a Y joint for connection. First, the structure of the prefabricated connection portion will be described.

The case 2 includes a main body 3, a first end plate 4,
It comprises three insulating cylinders 5 and 5 and second end plates 6 and 6 in accordance with the number of CV cables 1 and 1 each of which is a CV cable to be connected. The main body 3 is made of metal and formed in a cylindrical shape, and a first annular end plate 4 made of metal is screwed and fixed to an opening of one end (the left end in FIG. 3) of the main body 3. ing. 3 for inserting the connection ends of the CV cables 1 and 1 into the center of the first end plate 4 and the other end (the right end in FIG. 3) of the main body 3, respectively.
A plurality of circular openings 7 are provided. Each of the insulating cylinders 5, 5 each formed into a short cylindrical shape by an insulating material such as an epoxy resin, is fixed by screws around the openings 7, 7. Further, each of the second end plates 6, 6
Is the outer edge of each of the insulating cylinders 5, 5 (the right edge in FIG. 3).
It is fixed with screws.

[0004] Inside the case 2 constructed as described above,
An insulating molded article 8 made of an insulating material such as an epoxy resin is held and fixed. That is, the insulating molded article 8 is fixed in the case 2 by screwing an end portion of the insulating molded article 8 to a portion near the inner peripheral surface of each of the second end plates 6, 6. A conductor connector 9 made of a metal having good conductivity such as copper is embedded and supported in such an insulating molded product 8. The conductor connector 9 is provided with three connection recesses 10, 10 corresponding to the number of the CV cables 1, 1 to be connected, facing the openings 7, 7 respectively. In the illustrated example, each of the connection concave portions 10 and 10 is formed as a tapered hole whose inner diameter becomes smaller from the opening to the back.

[0005] Each of the CV cables 1 and 1 is formed by covering the periphery of a conductor 11 with an insulating layer 12. At a connection portion, an end of the conductor 11 protrudes from an end of the insulating layer 12. ing. The periphery of the insulating layer 12 is covered with a shield wire 13, and the periphery of the shield wire 13 is covered with a surface covering 14 made of an insulating material. The shield wire 13 is grounded via studs 15 and 15, which will be described later, and the second end plates 6 and 6.

The conductor 11 of each of the CV cables 1 and 1
Is connected to the conductor connector 9 via a connection sleeve 16 as shown in FIGS. The connection sleeve 16 made of a metal having good conductivity such as copper has a first half portion (the first half portion in the insertion direction into the connection recess 10 as shown in FIG.
The outer peripheral surface is a sloping surface gently inclined in the same direction as the inner peripheral surface of the connection concave portion 10, and the receiving side inclined surface 17 whose outer diameter decreases toward the base edge toward the outer periphery of the intermediate portion. Is formed. A plurality of slits 18 are formed in the connection sleeve 16 at both front and rear edges so that the diameter can be elastically contracted. Such a connection sleeve 16
Are inserted into the connection recesses 10 together with the tip of the conductor 11 in a state of being fitted to the tip of the conductor 11.

[0007] The press-fixing sleeve 1 as shown in FIGS.
9, the inner and outer peripheral surfaces of the connection sleeve 16 and the conductor 1
1 and the inner peripheral surface of the connection recess 10;
Close to each other. The pressing and fixing sleeve 19 is
A male screw screwed into a female screw formed on the inner peripheral surface of the opening end of the connection concave portion 10 on the outer peripheral surface is attached to the distal end surface (left end surface in FIG. 6).
A push-side inclined surface 20 that engages with the receiving-side inclined surface 17;
Each is formed. Such a pressing and fixing sleeve 19
Is screwed into the opening end of each of the connection recesses 10, and further tightened, the pressing and fixing sleeve 19 presses the connection sleeve 16 toward the inside of each of the connection recesses 10.
Then, the engagement between the outer peripheral surface of the first half of the connection sleeve 16 and the inner peripheral surface of the concave portion 10 for connection, and the reception-side inclined surface 17
The connection sleeve 16 is pushed into the inside of the connection recess 10 while reducing its diameter based on the engagement between the connection sleeve 16 and the push-side inclined surface 20. As a result, the inner and outer peripheral surfaces of the connection sleeve 16 and the outer peripheral surface of the end of the conductor 11 and the inner peripheral surface of the connection recess 10 are in close contact with each other, and the end of the conductor 11 and the conductor connector 9 are connected to each other. To ensure conduction.

A part of the insulating molded article 8 which is located around the end of the insulating layer 12 is inclined in such a direction that the inner diameter decreases toward the connection recesses 10, 10. One inner diameter side tapered surface 22 is formed.
In the state where the end of the conductor 11 and the conductor connector 9 are connected as described above, the first inner diameter side tapered surfaces 22, 2,
The gap existing between the insulating layer 2 and the insulating layer 12 is closed by the pre-mold insulators 21 and 21. Each of these pre-mold insulators 21 is a combination of an insulating portion made of EP rubber and a semiconductive portion made of EP rubber to which carbon is added, and has a shape like an abacus ball stretched in the axial direction. A first outer diameter side tapered surface 23 which can be in close contact with each of the first inner diameter side tapered surfaces 22 is formed in one half in the axial direction of each of the pre-mold insulators 21, 21. or,
On the other half in the axial direction of each of the pre-mold insulators 21, 21, a second outer diameter side tapered surface 24 is formed which is inclined in a direction in which the outer diameter decreases as the distance from each of the connection recesses 10, 10 increases. doing.

Each of the pre-mold insulators 21, 2 as described above
1 are pressed by the pressing sleeves 25 toward the first inner diameter side tapered surface 22. The inner peripheral surface of each of these pressing sleeves 25 made of fiber reinforced plastic or the like is a second inner diameter side tapered surface 26 inclined in the same direction as the second outer diameter side tapered surface 24. It is arranged around the radial side tapered surface 24. Each of the pressing sleeves 25 is elastically pressed toward the pre-mold insulator 21 by pressing means 27.

The pressing means 27 are provided between the second end plates 6 and the pressing sleeve 25, respectively. A fixed ring 28 is supported on each of the second end plates 6, 6 by a plurality of studs 15, 15, respectively. A plurality of guide rods 29 are provided at a plurality of circumferential positions on a base end surface of each of the pressing sleeves 25, that is, on an end surface on the side opposite to the second inner diameter side tapered surface 26.
The base end of 29 is fixedly connected. The distal end of each of the guide rods 29 is inserted into a guide hole (not shown) formed at a portion near the inner diameter of each of the fixed rings 28. Further, the compression coil springs 30, 3 which are pressure springs
0 is provided between the fixed rings 28 and the pressing sleeves 25 around the guide rods 29, 29.

Each of the pressing sleeves 25, 25 is pressed against each of the pre-mold insulators 21, 21 by the pressing means 27, 27 respectively configured as described above.
The first inner diameter side tapered surface 22 and the first outer diameter side tapered surface 23 are in close contact with the inner peripheral surface of the pre-mold insulator 21 and the outer peripheral surface of the end of the insulating layer 12 without any gap. . For this reason, the insulation between the insulating layer 12 and the insulating molded article 8 is not impaired due to the existence of the gap.
In particular, the compression coil springs 3
0, 30 are incorporated, so that the pre-molded insulator 2
1 can be prevented from forming a gap between the inner peripheral surface 1 and the outer peripheral surface at the end of the insulating layer 12. The pressing force of the pressing means 27, 27 against the pressing sleeves 25, 25 changes the positions of the nut 31 and the lock nut 32 screwed to the tips of the studs 15, 15 and the fixed ring. The distance between the compression coil springs 30 and 30 is adjusted by changing the distance between the compression coil springs 30 and 30 by changing the distance between the compression coil springs 30 and 30.

Each of the insulating cylinders 5 and 5 is
Body 3 and a cover 3 that covers the pressing means 27, 27
3 and 33 are isolated from each other so that when a failure such as insulation failure occurs, the location of the failure can be specified. For this purpose, the body 3 and the covers 33,
33 are independently grounded.

[0013]

The conventional structure as described above has the following disadvantages. The workability of assembling the prefabricated connection for CV cable is poor. That is, in order to connect the end of the conductor 11 of each of the CV cables 1 and 1 to the conductor connector 9, the pressing and fixing sleeve 19 is screwed to the conductor connector 9 and further tightened. In this tightening operation, the end of the conductor 11 is fixed to the conductor connector 9 together with the pressing and fixing sleeve 19 and the connection sleeve 16.
It is necessary to use a special tool after insertion into the connection concave portion 10 of the above, which is troublesome and deteriorates the workability of assembling the prefabricated connection portion for the CV cable.

With the work of connecting the end of the conductor 11 and the conductor connector 9, there is a possibility that the insulation property is deteriorated. That is, when the press-fixing sleeve 19 or the tool is inserted into the insulating molded product 8, the first inner side tapered surface 22 formed on the insulating molded product 8 may be damaged. If a scratch is made, a minute gap is formed in the scratched portion, and insulation failure occurs. Further, when the pressing and fixing sleeve 19 is screwed into the conductor connector 9 and further tightened, fine metal powder is generated, and this metal powder is generated by the first inner diameter side tapered surface 22 and the CV cable 1. It may adhere to the outer peripheral surface of the end of the insulating layer 12. Then, if it adheres, insulation of the portion becomes defective.

[0015] The total length of the prefabricated connection for the CV cable is increased. That is, the pre-mold insulator 21 connects the end of the conductor 11 and the conductor connector 9 to the connection recess 10.
Prior to insertion into the CV cable 1, it is necessary to fit the end of the insulating layer 12 of the CV cable 1. In this way, the pre-molded insulator 21 previously fitted to the end of the insulating layer 12 is slid with respect to the insulating layer 12 at the time of screwing and tightening the pressing and fixing sleeve 19. , Must be kept far away from the conductor connector 9. For this reason, the length of exposing the insulating layer 12 from the shield wire 13 and the surface coating 14 needs to be longer than necessary to connect the CV cables 1 and 1 to each other.
The total length of the prefabricated connection portion for the CV cable becomes longer than necessary. The cable retaining device for a prefabricated type connecting portion for a CV cable according to the present invention has been invented in order to eliminate any of the inconveniences described above.

[0016]

According to the present invention, there is provided a cable retaining device for a prefabricated type connecting portion for a CV cable, comprising: a conductor connector embedded in an insulating molding; and a connection connector provided on the conductor connector. A concave portion, a CV cable having an end portion of the conductor protruding, and a connection sleeve which is externally fitted and fixed to the end portion of the conductor and inserted into the connection concave portion to conduct the conductor and the conductor connector. The conductor inserted into the connection recess together with the connection sleeve is prevented from coming out of the connection recess. In addition, in addition to holding the above-mentioned insulating molded product in a case, it may be exposed without providing a case.

According to the present invention, there is provided a cable retaining device for a prefabricated connection portion for a CV cable according to the present invention. A connecting hole formed in the outer peripheral surface of the connecting sleeve, and a distal end portion held in the holding hole so as to be freely displaceable in a diametrical direction of the connecting sleeve. An elastic member that applies elasticity in a direction in which a distal end portion of the engaging piece protrudes from the outer peripheral surface of the connection sleeve; and the connection sleeve provided on an opening peripheral edge of the connection recess. A guide surface which engages with the distal end of the locking piece as it is inserted into the connection recess, and pushes the locking piece into the holding hole against the elasticity of the elastic member. The above connection provided on a part of the stopper Comprising a pressed surface that is inclined from the opening of the recess in a direction toward the diameter direction outer side of the connecting sleeve as towards the back, a pressing pin for pressing the pressed surface displaced in the axial direction of the connecting sleeve.

[0018]

According to the pre-fabricated cable connecting device for a prefabricated CV cable of the present invention constructed as described above, the engaging piece supported on the connection sleeve side and the engaging member provided on the connecting recess side of the conductor connector are provided. The engagement with the stop recess prevents the connection sleeve and the end of the conductor of the CV cable to which the connection sleeve is externally fixed from falling out of the connection recess.
The conductor and the conductor connector are connected via the connection sleeve. Further, when the pressed surface is pressed by the pressing pin to release the engagement between the locking piece and the locking recess, the ends of the connection sleeve and the conductor can be pulled out from the connection recess.

[0019]

1 and 2 show an embodiment of the present invention. The feature of the present invention is that the end of the conductor 11 constituting the CV cable 1 is connected to the conductor connector 9 and is electrically connected. Further, the end of the conductor 11 is connected to the conductor connector 9. The present invention relates to a structure of a portion for preventing the connection recess 10a from being carelessly provided. The entire structure of the prefabricated connection portion for the CV cable is the same as, for example, the conventional structure shown in FIG. 3 described above. Therefore, overlapping illustration and description are omitted or simplified.
The following description focuses on the features of the present invention.

At the end of the conductor 11, a connection sleeve 16a, which is a multi-point contact type connection fitting called a multi-band or multi-contact, is fitted and fixed. The connection sleeve 16a is composed of an outer sleeve 34 and an inner sleeve 35 that are concentrically combined with each other, and a holding sleeve 36 that is screwed to an end of the outer sleeve 34. The outer sleeve 34 is provided with a plurality of energizing elastic pieces (not shown) elastically protruding from the outer peripheral surface of the outer sleeve 34 to secure electrical continuity with the conductor connector 9. I do it. Further, the inner peripheral surface of the outer sleeve 34 and the outer peripheral surface of the inner sleeve 35 are engaged with each other in a wedge shape.

The tip of the holding sleeve 36 (FIG. 1)
(Left end) and an outer peripheral surface and a base end (right end in FIG. 1) inner peripheral surface of the outer sleeve 34 are formed with a male screw and a female screw which are screwed to each other. When the connection sleeve 16a is attached to the outer periphery of the end of the conductor 11 in the state shown in FIG. 1 and the holding sleeve 36 and the outer sleeve 34 are screwed together and further tightened, the inner sleeve 35 is To the tip of the conductor 11 (to the left in FIG. 1)
Pressed. The inner and outer peripheral surfaces of the inner sleeve 35 are in close contact with the inner peripheral surface of the outer sleeve 34 and the outer peripheral surface of the end of the conductor 11, thereby ensuring electrical continuity between the outer sleeve 34 and the conductor 11. I do.

The connection sleeve 16a is assembled to the end of the conductor 11 and the holding sleeve 36
The screwing and tightening between the outer sleeve 34 and the outer sleeve 34 are performed before the ends of the conductor 11 and the connection sleeve 16a are inserted into the connection recess 10a. Therefore, there is no possibility that the insulating molded article 8 is damaged or metal powder adheres to a portion to be insulated when the connecting sleeve 16a is attached to the end of the conductor 11. For this reason, the cause of the insulation failure does not occur with the assembling work of the prefabricated connection portion for the CV cable. A flat surface portion or a locking portion is formed on the outer peripheral surface of the holding sleeve 36 and the outer sleeve 34, and a tool such as a spanner is used when the two sleeves 36 and 34 are screwed and tightened. Can be locked freely.

On the other hand, at the portion of the inner peripheral surface of the connection concave portion 10a near the opening, an engaging concave portion 45 is formed over the entire circumference or at a plurality of positions in the circumferential direction (for example, at two positions on opposite sides). ing. Each of the locking recesses 45 is provided at a plurality of circumferential positions (for example, two positions on the opposite side) around a base half (right half in FIG. 1) of the holding sleeve 36 constituting the connection sleeve 16a. Is elastically supported by a locking piece 37 which can enter into the hole. That is, the holding holes 38 are provided at a plurality of positions (for example, two positions on opposite sides) of the outer circumferential surface of the pressing sleeve 36 in the circumferential direction.
Are formed so as to be opened on the outer peripheral surface of the holding sleeve 36, respectively. Then, each of the locking pieces 37 is inserted into each of the holding holes 38, respectively, with the connection sleeve 16 a.
Displaceable in the diametrical direction (vertical direction in FIGS. 1 and 2),
In addition, the rotation is held as an impossible state.

That is, the large-diameter portion 39 formed at the base end of each of the locking pieces 37 (the diametrically inner end of the connection sleeve 16a and the lower end in FIGS. 1 and 2) is inserted into the holding hole 38. Are fitted so as to be displaceable in the diametrical direction. A ring-shaped or frame-shaped holding plate 40 is provided in the opening of the holding hole 38.
Are fixed by screws or the like. The inner opening area of the holding plate 40 is smaller than the cross-sectional area of the holding hole 38,
Therefore, the inner peripheral edge of the holding plate 40 protrudes inward from the inner peripheral surface of the holding hole 38. The large diameter portion 39 has such a size that it cannot pass through the inside of the holding plate 40. Further, the middle part or the tip part of each of the locking pieces 37 is formed in such a size that it can pass through the inside of the holding plate 40. Further, a compression coil spring 41, which is an elastic member, is provided between the bottom surface of the holding hole 38 and the base end surface (the lower surface in FIGS. 1 and 2) of the locking piece 37. The compression coil spring 41 imparts elasticity to the locking piece 37 in a direction in which the distal end protrudes from the outer peripheral surface of the pressing sleeve 36. The rotation of the locking piece 37 is prevented by making the inner peripheral edge shape of the pressing plate 40 and the outer peripheral shape of the intermediate portion or the distal end of each locking piece 37 similar to each other. ing.

A guide surface 42 having a conical surface or a partially conical concave surface is formed in a portion of the connection concave portion 10a which is aligned with the locking concave portion 45 at the periphery of the opening. The guide surface 42 is inclined in a direction from the opening end of the connection recess 10a toward the inside of the connection recess 10a toward the inside in the diameter direction of the connection recess 10a. In addition, the relationship between the outer peripheral edge position and the inner peripheral edge position of the guide surface 42 is such that when the locking piece 37 is most protruded, the distal end surface of the locking piece 37 is positioned between the outer peripheral position and the inner peripheral position. It is regulated to exist between. Therefore, when the holding sleeve 36 constituting the connection sleeve 16a is inserted into the connection recess 10a, the guide surface 42 engages with the tip of the locking piece 37 with this insertion, and the locking piece 37 37 is pushed into the holding hole 38 against the elastic force of the compression coil spring 41.

Then, the connection sleeve 16a is moved until the tip of the locking piece 37 and the locking recess 45 are aligned.
Is inserted into the connection recess 10a, the locking piece 3
7 is displaced radially outward of the connection concave portion 10 a by the elastic force of the compression coil spring 41, and the tip end of the locking piece 37 enters the locking concave portion 45. In this state,
The connection sleeve 16a including the holding sleeve 36 and the conductor 11 to which the connection sleeve 16a is fixed do not fall out of the connection recess 10a.

A part of the locking piece 37 is provided with a pressed surface 43 used for pushing the locking piece 37 into the holding hole 38 against the elasticity of the compression coil spring 41. Provided. In order to provide the pressed surface 43, the locking piece 3
A groove 44 is formed in the first half of the connecting sleeve 16 in the axial direction of the connection sleeve 16a. The intermediate portion of the concave groove 44 is moved from the opening of the connection concave portion 10a toward the back (from the right to the left in FIG. 1) of the connection sleeve 16.
The pressed surface 43 is inclined in a direction toward the outside in the diametrical direction a (upward in FIG. 1).

Further, a stop ring 46 is provided so as to face the opening of the connection concave portion 10a. Pressing pins are provided at two positions on one side (left side in FIG. 1) of the stop ring 46 on the opposite side in the circumferential direction. The base end of 47 is connected and fixed.
In order to provide the stop ring 46, a cylindrical surface portion 48 is formed in a part of the insulating composition 8 that is continuous from the small diameter side end portion of the first inner diameter side tapered surface 22, and the stop is formed inside the cylindrical surface portion 48. The ring 46 is rotatably supported. The width W ₄₈ of the cylindrical surface portion 48 is slightly larger (for example, about 2 mm) than the thickness T ₄₆ of the stop ring 46. At the time of assembling the prefabricated connection portion for the CV cable, a pre-molded insulator which is pressed by the pressing sleeve 25 (FIG. 3) to bring the first outer diameter side tapered surface 23 and the first inner diameter side tapered surface 22 into close contact with each other. The leading end of 21 enters a part of the cylindrical surface portion 48, and the leading end of the pre-molded insulator 21 contacts the side surface of the stop ring 46.

Each of the pressing pins 47 having their respective base ends connected and fixed to one side surface of such a stop ring 46,
Each of the connection sleeves 16a is disposed in the axial direction of the connection sleeve 16a. Each of the pressing pins 47 engages with the pressed surface 43 in a state where one side surface of the stop ring 46 abuts against the outer end surface of the conductor connector 9, and engages with the locking piece 3.
7 is long enough to push the necessary amount of the wire 7 into the holding hole 38. That is, while the outer peripheral edge of the distal end portion of the pressing pin 47 and the pressed surface 43 are in sliding contact with each other, the stop ring 4
6 is brought close to the connection recess 10a, and one side surface of the stop ring 46 is brought into contact with the peripheral edge of the opening of the connection recess 10a at the end face of the conductor connector 9. The locking piece 37 is displaced inward in the diameter direction of the connection sleeve 16a against the elasticity of the compression coil spring 41 until the locking piece 37 is completely removed from the locking recess 45. In order to allow the pressing pin 47 fixed to the stop ring 46 and the pressed surface 43 to freely engage with each other, a portion of the pressing plate 40 between the pressed surface 43 and the stop ring 46 is used. The portion is provided with a notch 49 through which the pressing pin 47 can be inserted.

When assembling the structure of the present embodiment as described above, the end of the conductor 11 to which the connection sleeve 16a is externally fixed is inserted into the connection recess 10a.
As described above, along with this insertion operation, the tip of the locking piece 37 enters the locking recess 45 as described above, and the connection sleeve 16a and the conductor 11 to which the connection sleeve 16a is fixed are connected.
But does not come out of the connection recess 10a. At this time, the pressing pin 47 is arranged at a position displaced in the circumferential direction from the locking piece 37 as shown by a chain line in FIG. That is, the stop ring 46 is connected to the pressing pin 4
After a slight rotation while keeping away from the peripheral edge of the opening of the connection concave portion 10a for at least the length of 7, the stop ring 46 and the peripheral edge of the connection concave portion 10a are again brought into contact with each other. Therefore, a recess or notch or the like in which the pressing pin 47 can be inserted is provided at a part of the conductor connector 9 at a position shifted in the circumferential direction from the locking recess 45, and the pressing pin 47 and the The interference with the conductor connector 9 is prevented.

As described above, according to the structure of the present invention, only by inserting the connection sleeve 16a into the connection recess 10a, the connection sleeve 16a and the conductor connector 9 are electrically connected, and the connection is made. The sleeve 16a can be prevented from falling out of the connection recess 10a. Thus, in this way, the connection sleeve 16a and the conductor connector 9 are connected.
After the connection, the pre-mold insulator 21 and the like are assembled. Therefore, the connection operation can be easily performed. In addition, it is not necessary to keep the pre-mold insulator 21 far away from the connection sleeve 16a during the connection work.
The axial dimension of the prefabricated connection for the CV cable can be reduced.

When disassembling the prefabricated CV cable connecting portion assembled as described above, first, the pre-mold insulator 21 is retracted from the stop ring 46 (moved to the right in FIG. 1). . Then, the stop ring 46 is rotated slightly more than the length of the pressing pin 47 while keeping it away from the peripheral edge of the opening of the connection recess 10 a so that the pressing pin 47 faces the pressed surface 43. After that, the stop ring 46 and the connection recess 10 are again
By contacting the peripheral edge of the opening a, the distal end of the locking piece 37 can be pulled out from the locking recess 45 based on the engagement between the pressing pin 47 and the pressed surface 43. In this state, if the CV cable 1 is pulled away from the conductor connector 9, the connection sleeve 16a and the conductor 11 are pulled out from the connection recess 10a, and the disassembly of the prefabricated connection portion for the CV cable is facilitated. I can do it.

[0033]

The cable retaining device for a prefabricated connection for a CV cable according to the present invention is constructed and operates as described above, and the following effects are obtained. The workability of assembling the prefabricated connection part for the CV cable can be improved. The insulating property does not deteriorate with the connection work between the end of the conductor and the conductor connector. The total length of the prefabricated connection portion for the CV cable can be shortened. The disassembly of the prefabricated connection for the CV cable can be easily performed.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing an example of an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along line AA of FIG.

FIG. 3 is a cross-sectional view showing an example of a prefabricated type connecting portion for a CV cable having a conventional structure.

FIG. 4 is a sectional view of a connection sleeve.

FIG. 5 is an end view seen from the right side of FIG. 4;

FIG. 6 is a sectional view of a pressing and fixing sleeve.

FIG. 7 is an end view seen from the right side of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 CV cable 2 Case 3 Main body 4 First end plate 5 Insulation cylinder 6 Second end plate 7 Opening 8 Insulation molding 9 Conductor connector 10, 10a Connection recess 11 Conductor 12 Insulating layer 13 Shield wire 14 Surface coating 15 Stud 16, 16a Connection sleeve 17 Receiving-side inclined surface 18 Slit 19 Press-fixing sleeve 20 Push-side inclined surface 21 Pre-mold insulator 22 First inner diameter side taper surface 23 First outer diameter side taper surface 24 Second outer diameter Side taper surface 25 Pressing sleeve 26 Second inner diameter side taper surface 27 Pressing means 28 Fixed ring 29 Guide rod 30 Compression coil spring 31 Nut 32 Lock nut 33 Cover 34 Outer sleeve 35 Inner sleeve 36 Holding sleeve 37 Locking piece 38 Holding hole 39 Large-diameter portion 40 Holding plate 41 Compression coil spring 42 Guide surface 43 Pressed surface 44 Depressed groove 45 Locking concave portion 46 Stop ring 47 Press pin 48 Cylindrical surface portion 49 Notch

Claims (1)

[Claims] 1. A conductor connector embedded in an insulating molded product, a connection recess provided in the conductor connector, a CV cable having an end portion of the conductor protruding, and an end portion of the conductor. Externally fitted and fixed, and incorporated into a prefabricated CV cable connection portion having a connection sleeve for conducting the conductor and the conductor connector by inserting into the connection recess, and into the connection recess together with the connection sleeve. A cable removal prevention device of a prefabricated connection portion for a CV cable, which prevents the inserted conductor from coming out of the connection concave portion,
A locking recess formed in the inner peripheral surface of the connection recess near the opening; a holding hole formed in a part of the connection sleeve so as to open to the outer peripheral surface of the connection sleeve; A locking piece that can be freely displaced in the diametric direction and is held in the holding hole and whose tip can freely enter the locking recess, and the tip of the locking piece can be moved from the outer peripheral surface of the connection sleeve. An elastic member for providing elasticity in a protruding direction, and provided on an opening peripheral portion of the connection concave portion, and engaged with a distal end portion of the locking piece as the connection sleeve is inserted into the connection concave portion. A guide surface for pushing the locking piece into the holding hole against the elasticity of the elastic member; and The sleeve inclined in the direction toward the diametrically outward of the connection sleeve Pressure surface and, CV cable prefabricated type connection portion of the cable retaining device including a pressing pin presses axially displaced the pressed surface of the connecting sleeve.