JP3208090B2 - Power cable connection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductor connector provided at an end of a cable conductor when an intermediate connection portion of a crosslinked polyethylene insulated power cable (CV cable) is formed using a block-molded reinforcing insulator. Connection and electrical,
The present invention relates to a power cable connection device capable of exhibiting good mechanical performance.

[0002]

2. Description of the Related Art In a connection portion of a large-capacity power cable such as a CV cable having a large conductor cross-sectional area, it is integrally formed by using a rubber / plastic material as disclosed in Japanese Patent Application Laid-Open No. H8-17540. It is known that it is formed by using a block mold reinforcing insulator. In the conventional cable connecting means, a copper conductor connector is fixed to a distal end of a cable conductor, and a conductor connector attached to the distal ends of two cable conductors to be connected is connected to a copper conductor joint. The cable is inserted in a state where the cable faces each other so that conduction between the cables is obtained.

[0003] In the conventional example, each of two conductor connectors inserted into the conductor joint includes:
Locking means between the conductor joint is provided. Then, with the conductor connector inserted into the conductor joint, the step formed inside the conductor joint and the step formed at the tip of the conductor connector are locked, and the conductor connector is connected to the conductor joint. A means for preventing it from coming off. As the conductor joint, a pleated multifaceted contact (louver) is provided circumferentially on the inner surface of a cylindrical member made of copper or the like having good conductivity, and the louver or the like presses and locks the conductor connector. Do
Those configured so that continuity between two cables can be obtained are also used.

[0004] A connection portion for a power cable as shown in the conventional example is configured, for example, as shown in FIG. 8, and a connection portion 10 for a cable includes two cables 1,
Conductor connectors 6 and 6a are integrally provided at the distal ends of the conductors 2 and 2a, respectively. Then, the conductor connectors 6 and 6a are inserted into the conductor joint 7 to constitute a means for setting a conductive state between the conductors via the conductor joint. In the cable connection section 10, a high-voltage shield electrode 11 is arranged at a position corresponding to the conductor joint 7, and a reinforcing insulator 12 as a block mold connection section is integrally formed in a cone shape with a predetermined length around the high-voltage shield electrode 11. Place the formed one.
The reinforcing insulator 12 is formed as a single piece using a rubber / plastic material such as an uncrosslinked polyethylene resin to which a crosslinking agent has been added.

In the cable connection section, a reinforcing insulator 1
2, a semiconductive layer 13 is arranged around the outer periphery, a waterproof mixture is formed at a predetermined thickness on the outer periphery thereof, and a metal protection tube 15 is arranged around an outer periphery of an insulator 14 made of the waterproof mixture. I do.
In the case where an insulated connecting portion is formed with respect to the protective tube 15, a means for arranging the insulating tube 16 at a predetermined position and a terminal seat 17 with respect to the protective tube 15 to connect to the ground is provided. Provided. Further, a waterproof layer 18 is disposed so as to cover both ends of the insulating tube 16 and a connection portion with the cable sheath tube, and the waterproof layer 18 is formed by means such as winding a waterproof tape. It constitutes means for preventing moisture and the like from entering inside.

[0008] In the case of forming the connecting portion as shown in FIG. 8, through the steps shown in FIGS. 9 to 12, FIG.
After forming a conducting portion of the cable via the reinforcing insulator 12 as shown in FIG. 3 and forming a connecting portion as shown in FIG. 13, each constituent member is arranged around the connecting portion, This constitutes the cable connection unit 10 shown in FIG. When connecting the cable, first, as shown in FIG. 9, bend or the like at the end of the cable to be connected is corrected, and then the cable sheath 5 is removed. Layer 4
Is peeled off, leaving only a predetermined length, so that the insulator 3 is exposed to a predetermined length on the tip side.

Next, as shown in FIG. 10, the insulator 3 is removed so that the cable conductor 2 protrudes, and the tip of the insulator 3 is formed by performing a pencil ring process. The operation of exposing the conductor is performed for each of the two cables facing each other. Thereafter, as shown in FIG. 11, the conductor connectors 6 and 6a are attached to the distal end of the conductor 2, respectively. Next, as shown in FIG. 12, the operation of inserting and fixing the two conductor connectors 6, 6a into the insertion holes 12a of the reinforcing insulator 12 is performed, and as shown in FIG.
A connection is formed in which the ends of the cables are fixed to each other in the reinforcing insulator 12. The reinforcing insulator 12 is made of an uncrosslinked polyethylene resin or the like to which a crosslinking agent has been added. The reinforcing insulator 12 is provided with a high-voltage shield electrode 11 at the center of the insertion hole 12a. 7 are provided, and the conductor connectors 6 and 6a of the two cable conductors 2 and 2a are connected via the conductor joint 7 while being positioned at the center of the high-voltage shield electrode 11.

As shown in FIG. 13, after the conductor connectors 6 and 6a of the two cable conductors 2 and 2a are connected inside the reinforcing insulator 12, a processing conductor is provided around the reinforcing insulator 12. And a process of applying heat and pressure from around the reinforcing insulator is performed. Then, by performing the above-described treatment, the uncrosslinked polyethylene resin to which the crosslinking agent for the reinforcing insulator is added is crosslinked, and the inner surface of the reinforcing insulator is brought into close contact with the surface of the cable insulator, and between the two members. No gaps or the like are formed. After the above-described processing is performed, an operation of attaching a covering member around the connection portion is performed to form a cable connection portion as shown in FIG.

In the conventional example, when forming a cable connecting portion, in order to mutually fix the conductor connectors attached to the two cable conductor ends, FIG.
The connecting means shown in FIG. 4 is used, and the connecting means uses a fixing member as shown in FIG.
Although the conductor connector 6 is denoted by reference numeral 21 in the conventional example and the embodiment of the present invention described below, it is needless to say that the conductor connector 6 refers to a member that performs the same operation as the conventional example. It is. In the example shown in FIGS. 14 and 15, in the fixed portion 20c that combines the conductor connectors 21 and 21a, in order to connect the cable conductors 2 and 2a to each other, each of the distal end members 25 and 25a of the conductor connector includes: The insertion-side connection tool 30 and the locking-side connection tool 40 as connection tools are respectively attached.

The conductor connector 21 is made of a metal such as copper or the like. The conductor fixing portion 22 is provided with a hole for inserting a conductor, and the conductor is inserted into the hole, and then a tightening action is performed. Give and integrate. Further, a small-diameter tip member 25 corresponding to a conductor joint is provided on the tip end side of the conductor connector 21.
A concave hole 26 having a predetermined depth is provided from the distal end side of the distal end member 25, and a screw portion 27 is provided on the inner surface of the hole. Further, the conductor connector 21a is configured symmetrically with the conductor connector 21;
Tip member 2 of two opposing conductor connectors 21 and 21a
The two conductor connectors are fixed to the threaded portions 27, 27a provided on the 5, 25a such that the threaded portions of the insertion-side connector and the locking-side connector are engaged with each other, and the fixing portion 20c is fixed. To be formed.

The insertion-side connector 30 and the locking-side connector 40 as connectors in the fixing portion 20c are configured as shown in FIG. 15, and are attached to the conductor connector 21 on the cable conductor 2 side. The insertion-side connector 30 is provided with a screw portion 31 on an outer peripheral portion of a cylindrical main body member. A head member 3 is provided on the tip end side of the main body member through a tapered portion 32.
3, the head member 33 is provided with a locking member 34 via a support shaft 35. The locking member 34 is provided with a plurality of predetermined members in the radial direction with respect to the axis of the main body. Arrange through intervals.

The locking-side connector 40 to be combined with the insertion-side connector 30 has a space portion 43 dug from a surface corresponding to the insertion-side connector on the inner surface of the main body having a screw portion 41 on the outer peripheral surface. Is provided. A projecting portion provided with a tapered surface 42 is provided at a portion of the space 43 on the entrance side, and the rear surface of the projecting portion is configured as a locking step portion 44. Then, the insertion-side connector 30 is connected to the locking-side connector 40 shown in FIG.
When the fixing portion 20c is formed as shown in FIG. 14 by mounting the fixing member 20c, the locking member 34 of the insertion-side connector is expanded, and the rear portion of the locking member 34 is locked to the locking step portion 44. In the state
Since the insertion-side connection tool and the locking-side connection tool are fixed, the fixed state of the conductor connector at the fixing portion can be maintained even when a tensile force is applied in the axial direction of the cable.

[0013]

In the case where the fixing portion as shown in FIG. 14 is formed, in order to properly set the conduction state between the two conductor connectors, the connection with the insertion-side connector is required. In order to accurately set the fixed state with the stop-side connector, it is necessary to precisely form the length of the recess provided in the distal end member of the conductor connector and the length of the insertion-side connector and the locking-side connector. It is said. However, when forming a cable connection portion, it may be required to adjust the mutual protruding position of the insertion-side connector and the locking-side connector, and when such adjustment is required, There is a problem that the connection means as shown in FIG. However, changing the length of the insertion-side connector and the locking-side connector is
This is a problem that cannot be easily dealt with in the field, and the projecting position of the insertion-side connector and the locking-side connector to be attached to the conductor connector from the tip of each conductor connector is arbitrary according to the construction conditions at the site. It is desired to develop a means for adjusting the speed.

The present invention solves the problem of the conventional connection of the conductor connector as described above, and the fixing position of the insertion-side connector and the locking-side connector attached to the distal end member of the conductor connector is arbitrary. It is an object of the present invention to provide a connecting means which can be adjusted in a fixed manner and can surely hold the fixed state.

[0015]

According to the present invention, there are provided two reinforcing members which are integrally formed in advance from a rubber or plastic material and have a high-voltage shield electrode at the center of a through hole provided in the longitudinal direction, and two reinforcing insulators. A conductor connector provided at each of the distal ends of the cable conductors; and an insertion-side connector and an engagement-side connector provided at the conductor connector. The conductor connector provided with the connector is provided with a through-hole of the reinforcing insulator. Insert from both sides of
The present invention relates to an apparatus for forming a fixing part by combining the two connecting tools. The invention according to claim 1 of the present invention is characterized in that the connecting tool is screw-engaged with a screw portion provided in a concave hole of a cylindrical tip member provided to project from the tip of the conductor connector, and attached. In addition to the connecting device, an auxiliary member is engaged with the screw portion and attached, and the auxiliary member and the connecting device are screw-engaged with the screw portion and combined to position and fix the connecting device. Is performed. The invention according to claim 2 uses a disk-shaped auxiliary member provided with a screw on the peripheral surface as the auxiliary member, and when attaching the connecting tool to the distal end member of the conductor connector, a circular portion is formed with respect to a screw portion provided on the distal end member. The connecting member is mounted after the plate-shaped auxiliary member is mounted, and the disk-shaped auxiliary member and the connecting member are combined and fixed to the screw portion of the distal end member of the conductor connector. According to a third aspect of the present invention, a ring-shaped auxiliary member is used as the auxiliary member, and a locking step is provided on a side of the connecting tool projecting from a distal end member, and a ring-shaped auxiliary member is provided corresponding to the locking step. A member is mounted, and the connecting tool and the ring-shaped auxiliary member are combined via a threaded portion of a distal end member of the conductor connector, thereby fixing and mounting the connecting tool.

With the above-described structure, according to the present invention, the connecting tool attached to the distal ends of the two conductor connectors connected to face each other is accurately positioned with respect to the distal ends of the respective conductor connectors. It is possible to accurately connect the fixed portion at the conductor joint inside the reinforcing insulator. Then, even when a rotational force or the like is applied to the fixed portion, the connector can be prevented from rotating with respect to the conductor connector, and the fixed state of the two conductor connectors to be connected can be maintained. It is possible to ensure electrical and mechanical performance accurately. Further, in the fixing portion of the present invention, since the double bolt-shaped fixing means is used for the insertion-side connecting tool and the locking-side connecting tool mounted on the distal end member of the conductor connector, two bolt-shaped fixing means are used. By attaching the member to the threaded portion of the distal end member, it is possible to easily perform positioning and fixing of the connecting tool by using a member having a simple configuration.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The apparatus according to the present invention will be described with reference to the illustrated example. In the embodiment described below, after the assembling steps shown in FIGS. An example in which a cable connecting portion using a block-molded reinforcing insulator as shown is described. The configuration of the conductor connector, the insertion-side connection tool, and the locking-side connection tool will be basically described in the case of using the same one as conventionally used. The conductor connector 21 shown in FIG. 1 is provided with a small-diameter distal member 25 at the distal end of a conductor fixing portion 22 for inserting and compressing and fixing a cable conductor.
The distal end member 25 is provided with a concave hole 26 extending from the distal end to the front wall portion 23 of the conductor fixing portion 22, a screw portion 27 is formed in the concave hole 26, and a hole is formed in the center of the front wall portion 23. 24 are provided. The hole 24 is inserted into the hole 24 by inserting a tool from the distal end member when inserting and connecting an insertion-side connector or the like to the distal end member 25 in a step before inserting the conductor into the conductor fixing portion 22. It is used to rotate the side fittings.

The tip member 25 of the conductor connector 21 includes
After inserting the disk-shaped auxiliary member 50 for adjusting the position of the insertion-side connection tool as shown in FIG. 2, the insertion-side connection tool 30 is mounted as shown in FIG. The disk-shaped auxiliary member 5
Reference numeral 0 denotes a metal disk-shaped member, and a screw portion 51 having the same pitch as the screw portion 27 of the tip member is formed on the outer peripheral portion.
A hexagonal center hole 52 is provided at the center, and the center hole 52 is provided.
Is formed coaxially with a hole 24 provided in the front wall 23 of the conductor connector 21. Then, the disk-shaped auxiliary member 50 is rotated by using a tool inserted from the hole of the conductor fixing portion 22 to move the auxiliary member 50 to a predetermined position of the concave hole of the tip member, and then, as shown in FIG. An operation of mounting the side connection tool 30 is performed.

When mounting the insertion-side connector 30,
As shown in FIG. 4, the positioning of the insertion-side connector 30 with respect to the distal end member 25 is performed, and the disk-shaped auxiliary member 50 is moved so as to be in close contact with the back surface of the insertion-side connector 30.
Secure the two screw members. Therefore, the tip member 25
By arranging the insertion-side connecting tool and the disc-shaped auxiliary member in close contact with the screw portion 27, the same as in the case where two bolts are butted against one nut and fastened together, Since the two bolt-shaped members are fixed in a state in which they cannot be moved relative to each other, the fixing operation of the insertion-side connecting member to the distal end member can be accurately maintained.

When the insertion-side connector 30 is mounted in the concave hole 26 of the distal end member, the front wall portion is inserted into the hexagonal screw hole 36 provided at the center of the rear portion of the insertion-side connector. When a tool is inserted through the hole 24 and the through hole 52 of the disk-shaped auxiliary member, mounting and positioning of the insertion-side connecting tool can be easily performed. In the above embodiment, the hole 24 in the front wall portion is formed to have a large diameter, and the center hole 52 of the disk-shaped auxiliary member is formed to have a small diameter. Between the tool 30 and the disc-shaped auxiliary member 50,
The mounting operation of the two bolt-shaped members can be performed.

In parallel with the operation of mounting the insertion-side connector 30 on the conductor connector 21, the locking-side connector 40 is also mounted on the conductor connector 21 a, and the two conductor connectors 21 are mounted. , 21a are attached to the distal end of the cable, and the insertion-side connection tool and the locking-side connection tool are combined with each other to form a fixing portion 20 as shown in FIG. 5, the head member 33 of the insertion-side connection tool 30 is inserted into the space 43 of the locking-side connection tool 40, and the locking member 34 is expanded. By doing so, the two members are locked and held, and can be opposed to the tensile force in the length direction of the cable. Since the projecting positions of the insertion-side connector 30 and the locking-side connector 40 are accurately set with respect to each of the distal end members of the two opposing conductor connectors, the conductor connector 21 , 21a can accurately maintain the electrical and mechanical performance. In addition, in the fixing portion 20, the insertion-side connecting member and the locking-side connecting member to be attached to the distal end member are disk-shaped auxiliary members 50 and 50a, respectively.
Is fixed in an immovable state inside the distal end member through the member, so that even when a force for rotating the cable is applied, the combination of the double bolt-shaped screw members rotates inside the distal end member. Nothing.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In addition to forming the fixing portion 20 as shown in FIG. 5, in the present invention, as shown in FIG. It is possible to use means for setting the fixed state. In the example of the fixing portion 20a shown in this example, the insertion-side connector 30 and the locking-side connector 40 are respectively attached to the distal end member of the conductor connector, and then the ring-shaped member is attached, so that the double bolt is attached. Set the lock state of the shape. Further, the ring-shaped auxiliary members 55 and 55a used in this embodiment have a threaded portion formed on the outer periphery of the ring-shaped member. Steps 37 to be provided, 4
7 is formed to have the same outer diameter.

A description will be given of a case where the insertion-side connector 30 and the ring-shaped auxiliary member 55 are combined with the conductor connector 21. In this example, the conductor connector 2 is connected to the cable conductor 2.
1 is attached in advance, and then the insertion-side connector 30 is inserted into the distal end member 25. After that, the tip member 2
After positioning the insertion-side connecting member 30 with respect to 5, the ring-shaped auxiliary member 55 is mounted and fixed in a state where it is combined with the step portion 37 of the inserting-side connecting member. And the insertion-side connector 3
Since the thread portion of No. 0 and the thread portion of the ring-shaped auxiliary member 55 are positioned in combination with the thread portion of the tip member in a double bolt shape, the insertion-side connecting tool rotates with respect to the tip member. It is attached so that it can be prevented from doing. In addition, the locking-side connector 4 for the conductor connector 21a
At the time of attachment of the fixing part 20a, the same fixing operation as in the case of the insertion-side connector is performed, and the conductor connectors 21 and 21a are combined in a state where they abut each other.
Can be formed.

Therefore, the fixing portion 20a as described above
, The cable conductors can be assembled in an accurately fixed state, so that the conductor connectors 21, 21
a, electrical and mechanical performance can be accurately maintained. Further, also in the fixing portion 20a, the insertion-side connection tool and the locking-side connection tool to be mounted on the distal end member are fixed to the immovable state inside the distal end member via the ring-shaped auxiliary members 55 and 55a, respectively. Therefore, even when a force for rotating the cable is applied, the double bolt-shaped screw portion does not rotate inside the distal end member.

FIG. 7 shows an example in which the fixing portion 20b is formed by fixing the insertion-side connecting tool and the locking-side connecting tool to the tip members without using the double bolt-shaped fixing means. An example is shown. In this example, one or a plurality of screw holes are provided for each of the tip members 25 and 25a of the conductor connector, and the insertion-side connector 30 and the fixed-side insertion member are provided for the tip member of the conductor connector. Means for mounting and fixing the tools 40 and then mounting and fixing the bolts 28 and 28a are used. By mounting the bolt 28, the screw portion of the insertion-side connector 30 is fixed in a state of being strongly pressed, so that the insertion-side connector can be prevented from rotating inside the distal end member, and the insertion side with respect to the conductor connector can be prevented. The fixing and holding action of the connection tool can be maintained well. Also, after fixing the insertion-side connection tool by mounting the bolt 28, the head of the bolt 28 projecting from the surface of the tip member is scraped off,
If the surface of the distal end member is formed in such a manner that no irregularities are formed, it is possible to prevent the operation of the distal end member of the conductor connector from coming into contact with the inner surface of the conductor joint.

In the example shown in FIG. 7, the insertion-side connector 30 is positioned and fixed with respect to the conductor connector 21. At the same time, the locking-side connector 4 is also fixed with respect to the conductor connector 21a.
The fixing part 20b is formed in a state where two conductor connectors are abutted after the operation of fixing the conductor connectors is performed and the forming operation of the tip member of each conductor connector is performed. Then, by inserting the distal end member of the insertion-side connecting tool 30 into the space of the locking-side connecting tool 40 and performing fixing by the locking member 34, the two cable conductors to be connected can be fixed. .

When the fixing portion in each embodiment of the present invention is formed, as shown in FIG. 12, each conductor connector is inserted into the hole of the reinforcing insulator. As shown, the fixing portion can be formed inside the conductor joint. After the fixing portion is formed, the outer peripheral portion of the reinforcing insulator and the cable body are covered with each other to form a cable connecting portion as shown in FIG. The processing of the connecting portion after the formation of the portion is performed in the same manner as in the case of the conventional example.

[0028]

According to the present invention, with the above-described structure, the connecting tool attached to the distal ends of the two conductor connectors which are connected to face each other can be accurately positioned with respect to the distal ends of the respective conductor connectors. The fixing portion at the conductor joint inside the reinforcing insulator can be accurately connected. Then, even when a rotational force or the like is applied to the fixed portion, the connector can be prevented from rotating with respect to the conductor connector, and the fixed state of the two conductor connectors to be connected can be maintained. It is possible to ensure electrical and mechanical performance accurately. Further, in the fixing portion of the present invention, since the double-nut-shaped fixing means is used for the insertion-side connector and the locking-side connector attached to the distal end member of the conductor connector, two bolt-shaped fixing members are used. By attaching the member to the threaded portion of the distal end member, it is possible to easily perform positioning and fixing of the connecting tool by using a member having a simple configuration.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a conductor connector used in the present invention.

FIG. 2 is an explanatory diagram of an example in which a disc-shaped auxiliary member is combined with a conductor connector.

FIG. 3 is an explanatory diagram of an example in which an insertion-side connector is attached to a conductor connector.

FIG. 4 is an explanatory view of a state in which a disc-shaped auxiliary member and an insertion-side connecting tool are fixed to a conductor connector;

FIG. 5 is an explanatory diagram of a fixing portion using the conductor connector of FIG. 4;

FIG. 6 is an explanatory view of a second embodiment of the fixing portion of the present invention.

FIG. 7 is an explanatory view of a third embodiment of the fixing portion of the present invention.

FIG. 8 is an explanatory diagram showing a configuration of a general cable connection portion.

FIG. 9 is an explanatory view of a state in which a jacket member at a cable tip is removed.

FIG. 10 is an explanatory view of a state where processing for exposing a conductor is performed.

FIG. 11 is an explanatory view showing a state where a conductor connector is attached to the tip of two conductors to be connected.

FIG. 12 is an explanatory diagram of a state where one of the cables is inserted into a reinforcing insulator.

FIG. 13 is an explanatory diagram of a state in which two cable conductors are connected via a reinforcing insulator.

FIG. 14 is an explanatory view of a conventional fixing unit.

FIG. 15 is an explanatory diagram showing a configuration of an insertion-side connection tool and a locking-side connection tool used in FIG. 14;

[Explanation of symbols]

1 cable, 2 cable conductor, 6 conductor connector, 7 conductor joint, 10 cable connection,
Reference Signs List 12 reinforced insulator, 15 protective tube, 16 insulating tube, 20 fixing part, 21 conductor connector, 25
Tip member, 27 screw portion, 30 insertion side connection tool, 33 head member, 34 locking member, 37
・ 47 steps, 40 Locking-side connector, 44
Locking step, 50 disk-shaped auxiliary member, 55 ring-shaped auxiliary member.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02G 15/08 H01R 43/00

Claims (3)

(57) [Claims] 1. A reinforcing insulator having a high-voltage shield electrode at a central portion of a through hole formed in a longitudinal direction and integrally formed of a rubber / plastic material in advance, and a reinforcing insulator provided at a tip portion of two cable conductors to be connected. A conductor connector, and an insertion-side connector and a locking-side connector provided on the conductor connector, respectively, wherein the conductor connector provided with the connector is inserted from both sides of a through hole of the reinforcing insulator, An apparatus for forming a fixed part by combining two connecting tools, wherein the connecting tool is screwed to a screw portion provided in a concave hole of a cylindrical tip member provided so as to protrude from the tip of the conductor connector. In addition to engaging and attaching, in addition to the connecting tool, an auxiliary member is engaged with the screw portion and attached, and the auxiliary member and the connecting tool are screw-engaged with the screw portion and combined. And a power cable connection device for positioning and fixing the connection tool. 2. A disk-shaped auxiliary member having a screw provided on a peripheral surface as the auxiliary member, and when attaching the connecting tool to a distal end member of the conductor connector, a disk-shaped auxiliary member is provided for a screw portion provided on the distal end member. 2. The connecting member is mounted after the auxiliary member is mounted, and the disk-shaped auxiliary member and the connecting device are combined and fixed to the screw portion of the distal end member of the conductor connector. A power cable connection device according to claim 1. 3. A ring-shaped auxiliary member is used as the auxiliary member, a locking step is provided on a side of the connecting tool projecting from a distal end member, and a ring-shaped auxiliary member is provided corresponding to the locking step. The power cable according to claim 1, wherein the connecting tool is fixedly attached by attaching the connecting tool and the ring-shaped auxiliary member via a screw portion of a distal end member of the conductor connector. Connecting device.