JP3329791B2 - Cable connection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable connecting portion, and more particularly, to a connecting portion between a cable conductor and an inner conductor constituting a bushing (hereinafter referred to as an "energizing portion").
The invention relates to a cable connection with means for restraining and retaining the cable conductor itself.

[0002]

2. Description of the Related Art In general, at a terminal connection portion of a power cable, in addition to a function of flowing a current flowing through a cable conductor to an inner conductor of a bushing (hereinafter referred to as an "energizing function"), the cable conductor is used as an inner conductor of the bushing. A restraining and retaining function (hereinafter referred to as “retaining function”) is also required.

Conventionally, as a terminal connecting portion of a power cable having such an energizing function and a terminating function, a cylindrical wedge having a slit in an axial direction is provided on an outer periphery of a distal end portion of a cable conductor, and a thread portion is provided on an outer periphery. A cylindrical wedge fastener is mounted with the wedge arranged at the upper part, and the screw part of the wedge fastener is screwed into a screw part formed on the inner peripheral surface of the inner conductor of the bushing. There is known a method using a so-called wedge tightening method in which a wedge is fixed to an outer peripheral surface of a cable conductor by screwing the wedge toward an upper portion.

However, in the terminal connection portion of the power cable using such a wedge tightening method, a wedge tightening tool is provided below the wedge, and a wedge tightening tool is further provided below the wedge tightening tool. When the wedge and the wedge fastener (hereinafter referred to as “current-carrying parts”) are incorporated, the pre-molded insulator attached to the outer periphery of the cable insulating layer must be placed because the wedge fastener must be rotated after being placed. There is a drawback that it is necessary to pull down the lower part and that the cable sheath must be removed more than necessary as the pre-mold insulator is lowered. Also, as a result of removing the cable sheath more than necessary,
After assembling the current-carrying parts, there is a problem that the cable protection fitting for protecting the removed portion of the cable sheath becomes longer, and that the entire terminal connection portion of the power cable becomes larger. Furthermore, the bushing may be damaged by the wedge tightening tool used when assembling the current-carrying parts, and the cutout generated when the wedge tightening screw is screwed remains in the inner part of the bushing, and as a result, the power cable There is a possibility that the insulation characteristics at the terminal connection part of the above may be degraded.

For this reason, in order to reduce the size of the current-carrying portion, save labor for assembling the current-carrying parts, and improve the insulation characteristics at the terminal connection portion of the power cable, a terminal connection portion of the power cable using a so-called ball lock system is used. Is being developed.

FIG. 4 is a longitudinal sectional view of a main part of a terminal connecting portion of a power cable utilizing such a ball lock system. In the figure, a terminal connection portion of the power cable has a bottomed cylindrical internal plug 2 compression-connected to the outer periphery of an upper end portion of a cable conductor 1, and is fitted and inserted into the outer periphery of the internal plug 2, and has a bushing (not shown). ), And a cylindrical external plug 4 that conducts between the bottomed cylindrical internal conductor 3 and the internal plug 2, and is movable in the axial direction of the external plug 4 below the inner peripheral surface of the external plug 4. And an external plug 4, which is pressed by the pressing metal 5 and protrudes into a ball storage groove 3 a formed on the inner peripheral surface of the internal conductor 3.
A ball 6 for locking between the outer plug 4 and the inner conductor 3; and a coil-shaped spring 7 disposed between the outer plug 4 and the press fitting 5.

[0007] The above-mentioned press fitting 5 has an annular press member 5a which is pressed when the pre-mold insulator 9 fitted to the outer periphery of the upper end portion of the cable insulating layer 8 is mounted at a predetermined position, and which is pressed by this press. And a projecting member 5b for projecting the ball 6 into the ball storage groove 3a of the internal conductor 3 when the metal fitting 5 advances to the bushing side. The upper end of the coiled spring 7 is fitted in an annular groove 4a provided on the lower surface side of the external plug 4, and the lower end is fitted in an annular spring storage groove 5c provided on the upper side of the press fitting 5. It is stored. Reference numeral 1a designates a wedge which is driven from the screw hole 2b side provided in the bottom 2a of the internal plug 2 to the distal end of the cable conductor 1, 4c designates a flange protruding from the inner periphery of the upper end of the external plug 4, and 10 designates a lower surface. A disk-shaped connecting member having a boss 10a at the center of the boss 10a is a threaded portion formed on the outer periphery of the boss 10a, 2c and 4b are an internal plug 2 and an external plug 4b.
2 shows conductor connectors mounted in annular concave grooves respectively formed on the outer periphery of the conductor connector.

When the pre-mold insulator 9 is pressed toward the bushing side by a pressing mechanism (not shown) at the end connection portion of the power cable having such a configuration, the upper end of the pre-mold insulator 9 is pressed. The annular stopper 9a disposed on the contact member comes into contact with the pressing member 5a to push the pressing metal member 5 upward. Then, the ball 6 supported on the inclined surface of the projecting member 5b is moved by the inclined surface to the projecting member 5b.
Of the ball storage groove 3a
The ball 6 protrudes inward and the ball 6 is prevented from moving inward in the radial direction by the protruding member 5b. As a result, the inner conductor 3 and the outer plug 4 are locked, the flange portion 4c of the outer plug 4 is clamped and fixed between the inner plug 2 and the connecting member 10, and the inner plug 2 is The cable is prevented from falling off.

Next, a method of pulling out the cable from the bushing at the terminal connection portion of the power cable having such a configuration will be described.

First, a cable protection bracket (not shown) surrounding the outer periphery of the cable terminal is removed to expose the cable terminal.

Next, a drawing tool (not shown) is attached to the outer periphery of the pre-mold insulator 9, and the pre-mold insulator 9 is pulled down by about 5 to 10 mm. Then, since the stopper 9a retreats downward, the pressing fitting 5 is lowered by receiving the spring force of the spring 7, the restraint of the ball 6 is released, and the ball 6 moves radially inward as shown in FIG. . Thereby, the lock of the external plug 4 is released,
As a result, the cable conductor 1 is unlocked, so that the cable can be pulled out from the bushing.

According to the power cable terminal connecting portion having such a configuration, it is not necessary to dispose a wedge fastening member below the wedge, so that the size of the current-carrying portion can be reduced. Since there is no need to dispose a wedge tightening tool below the fastener, labor can be saved in assembling the current-carrying part, and the current-carrying parts can be assembled without using the wedge tightening tool. Therefore, there is no facet when the current-carrying parts are assembled, and it is possible to improve the insulation characteristics at the terminal connection of the power cable.

[0013]

However, in the terminal connection portion of the power cable using such a ball lock system, it is easy to replace the pre-mold insulator at the time of switching the power cable line or the like. There was a drawback that you could not. That is, at the terminal connection portion of the power cable using the ball lock method, the inner plug is compressed and fixed to the outer periphery of the cable conductor, so that when the thickness of the cable insulating layer is small, the outer diameter of the inner plug is reduced. However, since the diameter becomes larger than the outer diameter of the cable insulating layer, there is a drawback that the pre-molded insulator cannot be pulled out from the cable end. Further, even if the pre-mold insulator is disassembled and pulled out, there is a problem that a new pre-mold insulator cannot be attached to the outer periphery of the cable insulating layer.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned difficulties, and it is possible to reduce the size of a current-carrying part, save labor for assembling a current-carrying part, and improve insulation properties at a cable connection part. It is an object of the present invention to provide a cable connecting portion that can easily replace a pre-molded insulator even in a power cable having a thin cable insulating layer.

[0015]

In order to achieve such an object, a cable connecting portion of the present invention is removably fitted around an outer periphery of an upper end portion of a cable conductor exposed by stepping off a cable terminal , From the lower part to the upper part on its own outer peripheral surface
A cylindrical wedge that has a tapered portion that is reduced in diameter and that can expand and contract in the radial direction. Press-fit along the tapered portion of the wedge.
Is fitted to be in the wedge is a cylindrical conductive member to conduct between the cylindrical inner conductor and the wedge constituting the bushing is fixed to the cable conductor, the lower outer periphery of the wedge
Made and a cylindrical anchor unit that, anchor unit
Has a retaining body having a cylindrical portion and an inclined portion,
It is movably arranged inside the body in the axial direction of this retaining body
A pushing member disposed on the inclined portion of the pushing member;
Receiving recess provided on the inner peripheral surface of the inner conductor by pressing
Projecting into the space between the cylindrical part of the anchoring body and the inner conductor.
And a protruding member for locking.

According to the present invention , similarly to the above-described terminal connection portion of the power cable utilizing the so-called ball lock system, the size of the current-carrying portion can be reduced, labor for assembling the current-carrying parts can be reduced, and the insulation characteristics at the cable connection portion can be reduced. Can be improved.

After the cable terminal is removed from the bushing, the conductive member and the wedge can be removed from the outer periphery of the cable conductor. Therefore, even when the insulation thickness of the cable insulation layer is small, the outer periphery of the cable insulation layer can be removed. In addition, the pre-mold insulator can be easily pulled out, and a new pre-mold insulator can be easily attached to the outer periphery of the cable insulating layer.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a cable connecting portion according to the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a cable connecting portion of the present invention, and FIG. 2 is a half cut assembly view of a cable conductor restraining unit of the present invention. In FIG. 1, FIG.
The same reference numerals are given to parts common to FIG. 5 and FIG. 5. In FIG.
A cable terminal 11 of a power cable composed of a 66 kV class cross-linked polyethylene insulated polyvinyl chloride sheathed cable (hereinafter, referred to as “CV cable”) or the like is provided. The semiconductive layer 13, the cable insulating layer 8, and the cable conductor 1 are exposed. The outer periphery of the upper end of the exposed cable conductor 1 has a cylindrical wedge 1.
4, a retaining unit 15 is fitted around the outer periphery of the lower half of the wedge 14, and a cylindrical conductive member 16 is press-fitted around the outer periphery of the upper half.

As shown in FIG. 2, the wedge 14 is formed of a cylindrical metal sleeve, and an annular projection 14a is provided on the outer periphery slightly below the center.
The annular projection 14a is formed on the outer periphery of the upper half of the wedge 14.
A tapered portion 14b whose diameter decreases toward the upper end portion is formed, and an annular locking groove 14c is formed on the outer periphery of the lower half portion so as to be connected to the lower end surface of the annular projection 14a. In addition, wedge 1
In the upper half and the lower half of the wedge 4, a plurality (for example, eight) of slits 14d and 14e are formed along the axial direction from the upper and lower ends of the wedge 14 to positions near the annular projection 14a.
Are formed evenly along the circumferential direction, and the formation of these slits 14d and 14e allows the wedge 14 itself to expand and contract in the radial direction. A spiral groove (not shown) is provided on the inner periphery of the upper half of the wedge 14, if necessary.
Is formed.

The conductive member 16 is formed of a cylindrical metal plug, and has an inner peripheral surface formed with a tapered portion 16a whose diameter decreases from a lower end toward an upper end. Also,
A shallow annular groove 16 is formed in the center of the outer peripheral surface of the conductive member 16.
The tape-shaped conductor connector 16c (for example, multi-contact (trade name)) that expands and contracts in the thickness direction is mounted in the concave groove 16b along the circumferential direction.
The inclination of the tapered portion 16a of the conductive member 16 (for example,
1 to 6 degrees) is the same as the inclination of the tapered portion 14 b of the wedge 14.

The conductive member 16 having such a configuration is provided with the wedge 14
Is pressed into the outer periphery of the wedge 14 so as to slide downward from the upper end side, and the wedge 14 is radially reduced in diameter by the press-fitting of the conductive member 16 to the outer periphery of the wedge 14. Thereby, the wedge 14 is firmly fixed to the outer periphery of the cable conductor 1.

The retaining unit 15 includes a retaining body 17, a pushing member 18 movably disposed below the retaining body 17 in the axial direction of the retaining body 17, and a pushing member 1.
Projecting member 1 which projects in the radial direction by axial movement of 8
9 and an elastic member 20 disposed between the retaining body 17 and the pushing member 18.

The retaining body 17 has a cylindrical portion 17a and an annular locking member 17b inwardly connected to the upper end of the cylindrical portion 17a. Are locked in locking grooves 14 c of the wedge 14.

A through hole 17c and a pin insertion hole (not shown) are formed in the center of the cylindrical portion 17a and slightly below the center. The through hole 17c is provided with a tapered portion whose diameter is reduced from the inner peripheral side to the outer peripheral side of the cylindrical portion 17a, and the diameter of the outer peripheral side is substantially equal to or larger than the diameter of a ball as a projecting member 19 described later. It is slightly smaller. The number of the through holes 17c and the number of the pin insertion holes may be one or more. However, from the viewpoint of balance, the through holes 17c and the pin insertion holes are preferably provided evenly along the circumferential direction at four places of the cylindrical portion 17a. In this case, it is preferable to arrange the through hole 17c and the pin insertion hole such that the pin insertion hole is located between the through holes 17c, that is, the two are alternately arranged.
A C-shaped spring pin described later is mounted in the pin insertion hole.

The projecting member 19 has a ball (for example, a diameter of 6 m).
The ball as the projecting member 19 is disposed in the through hole 17c so that a half of the ball itself can project from the outer peripheral surface of the cylindrical portion 17a.

The pushing member 18 is provided on the cylindrical portion 1 of the retaining body 17.
7a, a small-diameter cylindrical portion 18a slightly smaller than the inner diameter of the medium-diameter cylindrical portion 18a, a small-diameter cylindrical portion 18c connected to the upper end of the intermediate-diameter cylindrical portion 18a via a tapered inclined portion 18b, and a medium-diameter cylindrical portion 17a.
A ring-shaped spring locking member 18d protruding inwardly from the inner periphery of the upper end of the ring member a, and a pressing ring 18e made of a ring-shaped hard plastic resin or the like fitted to the lower end of the medium-diameter cylindrical portion 18a.
A slit 18f having a predetermined length is formed in the center of the middle diameter cylindrical portion 18a along the axial direction. The slit 18f is provided at a position corresponding to the above-described pin insertion hole.

The elastic member 20 is constituted by a coiled spring. The spring as the elastic member 20 is as follows.
The upper end is fitted into an annular concave groove 17d formed on the lower surface of the locking member 17b, and the lower end is fitted with a spring locking member 18d.
Is disposed so as to be in contact with the upper surface side. here,
The outer diameter of the spring as the elastic member 20 is
8, the inner diameter of the spring is slightly larger than the inner diameter of the spring locking member 18d of the pressing member 18.

Next, the procedure for assembling the wedge 14, the conductive member 16 and the anchoring unit 15 (hereinafter, these members will be referred to as "conductor constraining units") having such a configuration will be described.

First, the spring pin 2 is inserted into the pin insertion hole of the cylindrical portion 17a of the anchoring body 17 constituting the anchoring unit 15.
1 was driven so that the tip did not protrude from the inner peripheral surface side of the cylindrical portion 17a, an adhesive tape made of cellophane tape was wound around the outer periphery of the cylindrical portion 17a, and the adhesive tape was previously disposed in the through hole 17c. A ball as the protruding member 19 is bonded and temporarily fixed.

Next, the upper end side of the coil-shaped spring as the elastic member 20 is fitted into the concave groove 17d of the locking member 17b of the retaining body 17, and the lower end side is pressed by the spring locking member 18d. Is pushed until the upper end surface of the push ring 18e comes into contact with the lower end surface of the cylindrical portion 17a of the retaining body 17, and is temporarily fixed with an adhesive tape made of cellophane tape so as to maintain this state. Thereby, the spring as the elastic member 20 is compressed, and a predetermined elasticity is given to this.

Subsequently, the spring pin 21 inserted in advance is prevented so that its head (not shown) does not protrude from the outer peripheral surface of the cylindrical portion 17a of the anchoring body 17, ie, the cylindrical portion 17a of the anchoring body 17 The spring pin 21 is driven so that the outer peripheral surface and the head of the spring pin 21 are flush with each other.
Is fitted into the slit 18f of the pressing member 18. Then, the pressing member 18 can move up and down within a range where the tip of the spring pin 21 freely moves within the slit 18f, that is, within a range in the longitudinal direction of the slit 18f. This prevents the pushing member 18 from being detached from the retaining body 17.

After removing the adhesive tapes (cellophane tapes) and confirming the operation of each component in the anchoring unit 15, the locking member 1 of the anchoring body 17 is removed.
7b is pushed into the locking groove 14c of the wedge 14 and fitted.

Next, the wedge 1 assembled as described above
1 and the anchoring unit 15 are fitted around the outer periphery of the upper end of the cable conductor 1 as shown in FIG.
Is inserted into the outer periphery of the wedge 14 from the upper end side of the cable conductor 1 and press-fitted into the anchoring unit 15 side. As a result, the wedge 14 is firmly fixed to the cable conductor 1, and the conductive member 16 electrically connects the cable conductor 1 to the internal conductor forming the bushing via the conductor connector 16c.

In the above embodiment, a conducting member made of a cylindrical metal plug having a tapered portion formed on the inner peripheral surface with the same inclination as the tapered portion of the wedge was press-fitted to the outer periphery of the upper half portion of the wedge. Although the case has been described , the present invention is not limited to this. For example, a tightening metal in which a taper portion is formed on the outer periphery of the upper half portion of the wedge at the same inclination as the taper portion of the wedge on the inner peripheral surface. A cylindrical member is press-fitted, and a conductive member formed of a cylindrical metal plug is inserted around the outer periphery of the clamped metal cylinder, and the conductive member electrically connects the clamped metal cylinder to an internal conductor forming a bushing. May be conducted.

Next, a method of attaching the cable terminal processing unit assembled as described above to the bushing will be described.

First, the bushing 22 has a cylindrical bushing main body 23 made of a molded body of epoxy resin or the like having a receiving end 23a for a cable terminal processing portion at a lower end portion, and is buried in the inner periphery of the upper end portion of the bushing main body 23. And a cylindrical inner conductor 24 whose upper end is closed.

The inner conductor 24 is formed of an upper cylindrical portion 2 having a closed upper end.
4a and a middle cylindrical portion 24 connected to a lower end portion of the upper cylindrical portion 24a, having a diameter slightly larger than that of the upper cylindrical portion 24a, and having a storage recess 24d formed of an annular groove or the like on an inner peripheral surface thereof.
b and a lower cylindrical portion 24c, which is connected to the lower end of the central cylindrical portion 24b and has a diameter slightly larger than that of the central cylindrical portion 24b. The storage recess 24d has a tapered portion that decreases in diameter in the radial direction from the inner peripheral surface of the middle cylindrical portion 24b. The diameter of the storage recess 24d is substantially equal to the diameter of the ball as the protruding member 19. I have.

The bushing 22 having such a structure is
An electric device (not shown) that accommodates a switch and a transformer is hermetically attached to an opening 25a provided at the bottom of a closed case 25 via a gasket 25b and the like.

Thus, as shown in FIG. 1, a cable terminal processing unit is inserted into the bushing 22 having the above-described structure.
The conductor connector 16c (see FIG. 2) of the conductive member 16 is brought into electrical contact with the inner peripheral surface of the upper cylindrical portion 24a of the inner conductor 24. Here, since the conductor connector 16c has the property of expanding and contracting in the radial direction, the conductive member 16 is connected to the conductor connector 16c.
It is possible to slide in the axial direction within the inner peripheral surface of the upper cylindrical portion 24a via the.

Next, a spindle-shaped pre-assembly comprising an insulating portion 9a made of a rubber-like elastic material and a semi-conductive portion 9b made of a semi-conductive rubber-like elastic material, which has been inserted in the outer periphery of the cable insulating layer 8 in advance. The mold insulator 9 is pressed toward the upper end by a predetermined distance (for example, about 4 mm) by an annular pressing metal member 26 constituting the compression device, and the pushing member 18 constituting the retaining unit 15 is pushed upward. Then, the protruding member 1
The ball 9 is pushed up radially outward from the small-diameter cylindrical portion 18c constituting the pushing member 18 along the outer surface of the inclined portion 18b. Further, the pressing member 18
Is pushed up to a position where the upper end of the locking member 17b comes into contact with the continuous portion of the upper cylindrical portion 24a and the middle cylindrical portion 24b that constitute the inner conductor 24, and the half of the ball as the projecting member 19 is pushed. It protrudes from the through hole 17c of the cylindrical portion 17a, and this fits into the housing recess 24d of the internal conductor 24. At the same time, the ball serving as the protruding member 19 rides on the outer peripheral surface of the medium-diameter cylindrical portion 18a constituting the pushing member 18, and this state is maintained, so that the protruding member 19 falls inward in the radial direction. Is prevented. Thereby, the anchoring unit 15 is locked to the inner conductor 24, and the cable is prevented from being pulled out. In the drawing, reference numeral 27 denotes a cable protection bracket for protecting the cable terminal processing unit, 28 denotes a fastening bolt for airtightly fastening an upper flange 27a of the cable protection bracket and a lower flange 23b of the bushing body 23 via a gasket 29, Reference numeral 30 denotes a spring constituting the compression device, 31 denotes a ground line, and 32 denotes a waterproof protective layer.

Next, a method of pulling out the cable from the bushing will be described.

First, at the terminal connection portion of the power cable shown in FIG. 1, the fastening bolt 28 is removed, and the cable protection fitting 27 and the pressing device 26 for the pre-molded insulator 9 are removed.
By removing 30 and the like, the cable terminal processing unit is exposed as shown in FIG.

Next, a drawing tool (not shown) is attached to the outer periphery of the pre-mold insulator 9, and the pre-mold insulator 9 is
Pull it down about mm. Then, the pressing member 18
Is lowered to the lower portion by receiving the spring force of the elastic member 20, the restraint of the ball as the projecting member 19 is released, and the ball moves radially inward. As a result, the retention unit 15
Is unlocked, the cable terminal processing section can be pulled out from the bushing 22 with the pre-mold insulator 9 attached to the outer periphery of the cable insulating layer 8.

Next, the conductive member 16 pressed into the outer periphery of the wedge 14 is slid toward the upper end and extracted.
Thereby, the wedge 14 fitted to the distal end of the cable conductor 1 can be removed.

Then, since the outer diameter of the cable conductor 1 is smaller than the inner diameter of the insertion hole of the spindle-shaped pre-mold insulator 9, the pre-mold insulator 9 can be slid toward the tip. As a result, the pre-mold insulator 9 can be easily removed from the outer periphery of the cable insulating layer 8.

In this state, if a new pre-molded insulator 9 is mounted on the outer periphery of the cable insulating layer 8, after the processing such as assembling the conductor restraining unit is performed in the same manner as described above, the cable terminal processing is performed. The part can be mounted in the bushing.

In the above-described embodiment, the case where the present invention is applied to the terminal connection portion of the electric wire / cable of the power equipment is described. However, the present invention is not limited to such a case. The present invention may be applied to a so-called straight connection portion or a branch connection portion that connects CV cables to each other via a cable.

[0049]

As is apparent from the above description, according to the cable connecting portion of the present invention, since the cable conductor is locked to the inner conductor via the conductor restraining unit,
It is possible to reduce the size of the current-carrying part, save labor for assembling the current-carrying parts, and improve the insulation characteristics of the cable connection part. Further, after the cable conductor is unlocked and the cable is pulled out from the bushing, the conductor restraining unit can be easily removed from the distal end portion of the cable conductor. Also, the pre-mold insulator can be easily removed and a new pre-mold insulator can be easily mounted.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a cable connecting portion of the present invention.

FIG. 2 is a half-cut assembly drawing of a conductor restraining unit according to the present invention.

FIG. 3 is a half cut longitudinal sectional view of a main part of a cable connecting portion showing a state of pulling out a cable in the present invention.

FIG. 4 is a longitudinal sectional view of a main part of a conventional power cable terminal connection portion.

FIG. 5 is a vertical cross-sectional view of a main part showing a state in which a lock of a cable conductor in a conventional power cable terminal connection portion is released.

[Explanation of symbols]

 14 ... wedge 15 ... retention unit 16 ... conduction member 17 ... retention body 18 ... pushing member 19 ...・ Protruding member 20 ・ ・ ・ ・ ・ ・ Elastic member

Claims (1)

(57) [Claims] 1. A cable conductor which is detachably fitted around an outer periphery of an upper end portion of a cable conductor exposed by stepping off a cable terminal .
Tapered portion on the outer peripheral surface that decreases in diameter from the lower part to the upper end
A cylindrical wedge that has
A cylindrical conductive member press-fitted along the tapered portion of the wedge to fix the wedge to the cable conductor and to conduct between the cylindrical inner conductor forming the bushing and the wedge; and a lower portion of the wedge. made and a <br/> cylindrical anchor unit which is fitted in part periphery, said anchor unit comprises a anchor body having a cylindrical portion, the inclined
Having a portion inside the retaining body in the axial direction of the retaining body.
A pusher movably disposed on the pusher, and an inclination of the pusher
Disposed on the inner portion, and the inside of the
The pull-out protrudes into a storage recess provided on the inner peripheral surface of the conductor.
Projection that locks between the cylindrical part of the clasp body and the inner conductor
And a member .