JP3472175B2 - 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 power cable such as a CV.
It can be suitably used as a Y-branch connection part of a cable.

[0002]

Power cables, such as CV cables,
In the middle of the track, one cable is used to connect two or more cables using a connecting part. Figure 6
An example of the Y-branch connection part 1 in which one cable can be connected to two cables is shown in FIG.

In this example, the Y-branch connecting portion 1 is provided with an internal conductor (embedded electrode) 2 having a substantially Y shape, and a Y-shaped bushing 3 made of epoxy resin is provided around the internal conductor 2.
Are integrally molded.

The Y-branch connection part 1 can be equipped with a connection material (connection tip part) 100 of one power cable 4 on one side, and two power lines arranged in parallel on the other side. The connection material (connection tip portion) 100 of the cable 4 can be attached. In this example, a premolded insulator (insulation plug) 200 is attached to the other side instead of the power cable 4.

Each connection receiving hole into which the cable connecting material 100 is mounted is formed by a connection hole 20 formed in the inner conductor 2 and a receiving hole 30 formed in the bushing 3 and communicating with the connection hole 20. To be done. In the conventional Y-branch connection part 1, the cable connection material 100 is roughly configured as follows.

That is, as will be better understood with reference to FIG. 7, a cylindrical wedge 15 having a slit formed on the outer periphery is fitted to the end conductor portion 40 of the cable which is subjected to the terminal treatment and exposed. It Adjacent to this wedge 15,
Wedge clamp 16 is screwed is disposed threaded holes 17 formed in the inner conductor 2 of the connecting hole 20. In this state,
The cable end is inserted into the connection receiving hole.

Protective fitting 41, compression device 42, push fitting 4
3. The stress cone 44, etc., is attached to the terminated cable, but is pulled down to the retracted position on the cable to the extent that the wedge clamp can be rotated with a tool.

Then, the wedge tightening tool 16 is rotated and screwed into the inner conductor 2, thereby pressing the wedge 15 and pressing the outer peripheral surface of the wedge 15 against the connection hole 20.
Lock it.

Thereafter, the stress cone 44 is received in the receiving hole 30.
It is inserted into the inside, and further fixed in place by the compression device 42 and the push fitting 43. The protective fitting 41 is attached to the end surface of the bushing with a bolt 45.

The premolded insulator (insulation plug) 200 is
The protective metal fitting 41 is fixed to the end surface of the bushing with a bolt 45. When the cable connecting material is attached to the bushing, the insulating plug 200 is removed, and the same cable connecting material (tip connecting portion) 100 as described above can be attached.

[0011]

However, in the branch connection portion 1, it may be necessary to replace the line due to an increase in power demand. In such cases,
It is necessary to remove the cable 4 connected to the Y-branch connection 1 from the connection 1.

In order to remove the cable 4 connected to the Y-branch connecting portion 1 from the Y-branch connecting portion 1 having the above-mentioned structure, the wedge 15 of the cable tip conductor 40 is strongly fixed to the connecting hole 20 of the inner conductor by the wedge tightening tool 16. Because it's locked
If the cable 4 is simply pulled, the Y
It cannot be separated from the branch connection unit 1, and the work procedure at the time of connection will be reversed.

That is, first, the protective fitting 41 and the compression device 4
2. The push fitting 43 and the stress cone 43 are retracted from the bushing 3 to such an extent that the wedge tightening tool 16 can be rotated by a tool (not shown). The wedge tightening tool 16 is rotated using the work space thus formed to release the locked state between the wedge 15 and the internal conductor connection hole 20. In this state, the cable 4 can be detached from the connection branch portion 1 by pulling the cable 4.

However, in particular, to the extent that the wedge clamp 16 can be rotated with a tool, the stress cone 4
It is extremely difficult to move 4 by shifting the outer peripheral surface of the cable, and it takes a lot of time.

Therefore, the present applicant has proposed a power cable connecting portion 1 as shown in FIGS. 8 and 9. That is, the power cable connecting portion 1 includes the inner plug 10 fixed to the tip of the conductor 40 of the power cable 4, the inner conductor 10 fitted into the inner plug 10 and located in the bushing (not shown), and the inner plug 10. And an outer plug 11 that is electrically connected to the outer plug 10. A pressure fitting 90 movably arranged in the axial direction of the outer plug 11 below the outer plug 11, and a pressing metal fitting 90 that is pressed by the pressure fitting 90 and projects into the positioning groove 91 of the inner conductor 2 and the inside of the outer plug 11. A projecting ball 92 that locks the conductor 2 is arranged, and a coil spring 93 is provided between the outer plug 11 and the pressing fitting 90.

The cable connecting portion 1 having such a structure is pressed by the stress cone 44 to move it forward, thereby
As shown in, the inner conductor 2 and the outer plug 11 are locked, and the cable 4 is prevented from being pulled out. Further, as shown in FIG. 9, by retracting the stress cone 44, the locked state between the inner conductor 2 and the outer plug 11 is released, and the cable 4 can be pulled out.

The cable connecting portion 1 having such a structure can surely prevent the cable from being pulled out, and is excellent in operability and reliability.

However, this cable connecting portion 1 is
Since the pressing metal fitting 90 is arranged outside the inner plug 10, there is a problem that the entire structure of the connecting portion 1 becomes large. Further, in order to confirm whether or not the cable is locked in the connection portion, it is necessary to retract the stress cone 44, and further miniaturization and improved operability are desired.

An object of the present invention is to enable reliable connection of a cable, to facilitate confirmation that the cable has been locked, and to minimize the movement of the stress cone when removing the cable to ensure efficient work. The purpose of the present invention is to provide a cable connecting portion having a small size and a simple structure capable of separating the cable.

[0020]

The above object is achieved by the connection portion of the cable according to the present invention. In summary, the first aspect of the present invention includes an inner conductor and a bushing integrally molded with a resin around the inner conductor, and a connecting hole of the inner conductor and a receiving hole of the bushing. the connection receiving holes formed in, a cable connection terminal of the cable with the stress cone is removably attached, said cable
A current-carrying part attached to the conductor of the inner conductor and adapted to make electrical contact with the connection hole of the inner conductor, and the current-carrying part and the cable.
A first detent located between the insulator and the end face of the insulator;
It is movably arranged in a locking hole provided in the first detent tool.
A locking member placed and a first with respect to the first detent.
Is movable in the axial direction of the cable via the compression spring means.
And a guide part for moving the locking member.
A second detaining tool having and to the second detaining tool
Is provided via a second compression spring means and is
A push ring that abuts the scone ;
The compression spring means has a weaker spring force than the second compression spring means.
It is said that the stress cone is attached to the cable tip.
By moving to the side through the push ring
The second detent tool is moved, and the engagement is performed by the guide portion.
In the connecting hole of the inner conductor by projecting the stopper member in the radial direction.
Insert the cable into the groove provided on the
The cable connection portion is characterized in that the cable connection portion is locked .

[0021] According to one embodiment of the present invention, the first
The detent has an inner detent and an outer detent, and
The locking hole is provided in the outer detaining member, and the second locking member is provided.
The detents are attached to the inner detents and the outer detents.
Has an intermediate detent located in the annular space formed by
However, the locking member is a locking ball.

A second aspect of the present invention provides an internal conductor and the internal conductor.
Equipped with a bushing integrally molded with resin around the body
Well, in the connection hole of the inner conductor and the receiving hole of the bushing
Detachable cable connection material in the formed connection receiving hole
In the cable connection part to be installed, the cable connection
The material is disposed on the cable end conductor portion, and the inner conductor is
The current-carrying part that makes electrical contact with the connection hole of the
Is disposed adjacent to the electrical part, and the stress cord of the connecting material is
The connection member by moving the connector to the side of the current-carrying part.
Charges are locked against the cable connection
And a restraining part that can be
An inner plug located in the tip region of the body and this inner plug
And an outer plug attached to the
And a retaining device, wherein the retaining device is a cable end conductor portion.
Located in the area between the plug and the end face of the cable insulation
And a substantially cylindrical inner detaining tool, and the inner detaining tool
Mounted on and concentric with the inner detent
Outer detent with a hollow cylindrical portion and said inner detainer
Located in the annular space formed by the outer detent and
Formed integrally with the guide portion and the guide portion
And a spring retainer, and the spring retainer,
A push ring disposed to face the portion,
A locking ball is movably arranged on the cylindrical part of the side pulling fastener.
The locking hole is provided so that the guide part of the intermediate
Between the side catch and the spring of the intermediate catch
Between the receiving part and the push ring, a compression spring
Arrange the steps, the guide part of the middle detent and the outer detent
The compression spring means provided between the
Pressure applied between the spring receiving portion of the tool and the push ring
The cable connecting member has a spring force weaker than that of the compression spring means.
When the material is attached to the connection receiving hole, the locking ball
Is pushed outwards in the radial direction by the guide part, and
By inserting it into the annular groove formed in the connection hole of the partial conductor,
Lock the cable to the connection,
Cable connection when disconnecting the connecting material from the connection
And a scan Torre scones material away from the conductive portion
Move the guide part by retracting it from the bushing.
The inner conductor so that it falls into the annular groove of the inner conductor.
Locking state of the locking ball that has been inserted and the annular groove
Release the lock on the cable connection.
Cable connection characterized by releasing the lock
It is a department.

According to an embodiment of the second invention, said
Inner plug has a slanted cylindrical shape with slits formed on the outer circumference
The outer plug is the outer periphery of the inner plug.
It has a slanted inner surface complementary to
It has a wedge function and compresses and fixes the inner plug to the tip conductor.
It is a plug to be attached and is formed on the outer peripheral surface of the outer plug.
The contactor is provided in the formed annular groove.

According to one embodiment of the first and second aspects of the present invention, the cable connection portion is a Y-branch connection portion, the inner conductor is substantially Y-shaped, and an epoxy resin is provided around the inner conductor. The Y-shaped bushing is formed integrally.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION A cable connecting portion according to the present invention will be described below in more detail with reference to the drawings.

FIG. 1 shows an embodiment of the cable connecting portion 1 of the present invention. In the present embodiment, the connecting portion 1 is described as a Y branch connecting portion, but is not limited to this.

In this embodiment, the Y-branch connection portion 1 is similar to the conventional Y-branch connection portion described above with respect to the overall structure, and includes an internal conductor (embedded electrode) 2 having a substantially Y shape. Equipped with an epoxy resin around the inner conductor 2
The shape bushing 3 is integrally formed.

One connection receiving hole is formed on one side of the Y-branch connecting portion 1 so that the connecting material (connection tip portion) 100A of one power cable 4A can be mounted, and on the other side, one connecting receiving hole is formed in parallel. Two connection receiving holes are formed by arranging the connection materials (connection tips) 100B and 100C of the two power cables 4B and 4C thus arranged in parallel so that they can be mounted. Each connection receiving hole includes a connection hole 20 formed in the inner conductor 2,
It is formed by a receiving hole 30 formed in the bushing so as to communicate with the connection hole 20. The connection hole 20 of the internal conductor 2 has a small diameter portion 20A and a large diameter portion 20B, as shown in FIG.

According to the invention, the cable connecting material 100A, 100B, 100C connected to the Y-branch connecting part 1.
Is roughly configured as follows. Since the cable connecting materials 100A, 100B and 100C have the same structure, only the connecting material 100B of the cable 4B will be described.

Referring to FIG. 2, the connecting material 100B of the cable 4B has a conducting portion and a restraining portion. That is, a plug that constitutes an energizing portion for making electrical contact with the inner conductor 2 is attached to the tip conductor portion 40 of the cable 4B that has been subjected to the terminal treatment and exposed. The plug is fitted in the conductor portion 40 in a region approximately half from the tip of the tip conductor portion 40, has a slit formed on the outer circumference, and has a slanted cylindrical inner shape with a spiral groove formed on the inner circumferential surface. It has a plug 10 and an outer plug 11 attached to the inner plug 10. The outer plug 11 has an inclined inner surface having a shape complementary to the outer periphery of the inner plug 10, fits into the inner plug 10 to perform a wedge action, and fixes the inner plug 10 to the tip conductor portion 40 by compression. An annular groove 12 is formed on the outer peripheral surface of the outer plug 11, and
A contactor 13 such as a multi-ram band configured by arranging a large number of ribbon-shaped leaf spring assemblies in an annular shape is arranged. When connecting the cable 4B to the Y branch connection unit 1,
The multi-ram band 13 is fitted to the small diameter portion 20A of the connection hole 20 of the inner conductor 2 and makes electrical contact.

According to the present invention, at the tip conductor portion 40, the cable 4B is pulled out from the connection portion 1 between the inner plug 10 fixed to the tip conductor portion 40 and the cable insulator end surface 46. A retaining device 50 that constitutes a restraint portion for preventing is arranged.

The detent device 50 includes a generally cylindrical inner detent 51 located between the inner plug 10 and the cable insulation end face 46, as will be better understood with reference to FIG. 3 as well. It has a tip of the inner detent tool 51, that is, an outer detain tool 53 screwed and attached to a screw portion 52 formed on the inner plug 10 side. Inner detainer 51
Is attached to the outer circumference of the conductor through the O-ring 54,
A stopper flange 55 is formed on the side opposite to the screw portion 52 so as to project to the outer periphery. The O-ring 54 serves to position the inner detaining tool 53 on the outer circumference of the conductor section 40 by self-alignment with the same axis as the conductor section 40.

The outer detaining tool 53 is the inner detaining tool 5.
It has a mounting portion 56 that is screwed into the mounting portion 1, and a cylindrical portion 57 that is integrally formed with the mounting portion 56 and that extends substantially concentrically with the inner detent tool 51. A plurality of, for example, 4 to 8 locking holes 58 are formed in the cylindrical portion 57 at equal intervals,
The locking ball 59 is movably arranged. In addition, the outer end surface 60 of the outer detaining tool 53 has a shoulder portion 21 with the small diameter portion 20A and the large diameter portion 20B of the connection hole 20 of the internal conductor 2 when the cable 4B is connected to the Y branch connection portion 1 (Fig. 2) and the outer peripheral surface fits into the large diameter portion 20B of the connection hole 20 of the internal conductor 2.

The detent device 50 further includes an intermediate detent tool 6.
1 is provided. The intermediate detent tool 61 is positioned in the annular space 62 formed by the inner detainer tool 51 and the outer detent tool 53, engages with and abuts on the locking ball 59, and the locking ball 59 is secured. Guide portion 63 for guiding the inside of the locking hole 58
And a spring receiving portion 64 formed integrally with the guide portion 63 and having an inner diameter larger than the outer diameter of the cable insulator 47. A push ring 65 is arranged on the outer circumference of the cable so as to face the spring receiving portion 64. Further, compression coil springs 66 and 67 are arranged between the guide portion 63 and the attachment portion 56 of the outer detent 53, and between the spring receiving portion 64 and the push ring 65, respectively. Compression coil spring 66
Has a weaker spring force than the compression coil spring 67.

Next, the connecting portion 1 of the present invention having the above structure.
A procedure for attaching / detaching the cable connecting material 100B to / from the cable will be described.

First, the cable connecting material 100B is shown in FIG.
Assembled as shown in. That is, the cable 4B connected to the connecting portion 1 includes the protective metal fitting 41 and the compression device 4
2, the metal fitting 43, the stress cone 44, etc. are drawn through the terminal end of the cable, and then the conductor 40
The retaining device 50 is attached to the. At this time, the intermediate detent tool 61 of the detaining device 50 is urged by the springs 66 and 67, and the guide portion 63 is in contact with the stop flange 55 of the inner detent tool 51. Therefore, the locking ball 59 can be moved inward in the radial direction from the locking hole 58, and the ball 59 falling inward is carried by the compression coil spring 66. Next, the connection plug, that is, the inner plug 10 and the outer plug 11 provided with the multi-ram band 13 are fixed to the tip conductor portion 40 as described above.

Then, as shown in FIG. 5, the cable 4B
When the connecting material (connecting tip) 100B is inserted into a predetermined connection receiving hole, the outer plug 11 provided with the multi-ram band 13 is fitted to the small-diameter portion 20A of the connecting hole 20 of the inner conductor 2 to make an electrical contact. . The outer detaining device 53 of the detaining device 50 is fitted and inserted into the large-diameter portion 20B of the connection hole 20 of the inner conductor 2. Further, the stress cone 44 is inserted into the receiving hole 3
When pushed to 0, the end face 44A of the stress cone 44 contacts the push ring 65 and pushes the push ring 65 toward the inner conductor 2 side.

At this time, as described above, since the compression coil spring 67 has a stronger spring force than the compression coil spring 66, the compression coil spring 67 compresses the compression coil spring 66 more, and thus the intermediate tension The fastener 61 moves inward toward the plug side against the spring force of the compression coil spring 66.

As a result, the locking ball 59 is moved radially outward in the locking hole 58 by the guide portion 63, and the locking ball 59 is formed in the large diameter portion 20B of the inner conductor 2 in an annular shape. It is recessed into the groove 22. Therefore, the cable 4 </ b> B is locked in the connecting portion 1 and is prevented from being pulled out from the connecting portion 1.

As a result, the locking ball 59 is moved radially outward in the locking hole 8 by the guide portion 63,
The locking ball 59 is pushed into the annular groove 22 formed in the large diameter portion 20B of the inner conductor 2. Therefore, the cable 4
B is in a state of being locked to the connecting portion 1 and is prevented from being pulled out from the connecting portion. In this state, cable 4B
By applying force in the direction to pull out the
It is possible to confirm whether or not the cable 4B is securely locked to the connecting portion 1. At this time, the stress cone 44
Does not need to be retracted. That is, as described above, since the compression coil spring 67 has a larger spring force than the compression coil spring 66, even if a force is applied in the direction of pulling out the cable 4A from the connection portion 1, the compression coil spring 66 is compressed. It is compressed by the coil spring 67, and the locking ball 59 maintains a state in which it is moved radially outward in the locking hole 58 by the guide portion 63.

After confirming that the cable 4B is securely locked to the connecting portion 1, the stress cone 44 is further
The protective metal fitting 41 is fixed to the end surface of the bushing 3 by being pressed toward the connection portion by the pressing metal fitting 43 and the compression metal fitting 42.
Further, as shown in FIG. 2, the waterproof cover 48 is fixed to the metal case 1A of the connecting portion 1 with bolts.

Due to an increase in power demand and the like, it is necessary to replace the lines, and when the cable connected to the connecting portion 1 is removed from the connecting portion, the work procedure at the time of connecting is reversed. .

That is, first, the waterproof cover 48 is removed,
The protective metal fitting 41, the compression device 42, and the pressing metal fitting 43 are displaced to predetermined positions.

Next, the stress cone 44 is pulled out from the receiving hole 30 of the bushing and retracted. Push ring 6
5 and the intermediate detent tool 61 are moved together with the stress cone 44 retracted by the coil springs 66 and 67, and the locking state with the locking ball 59 that has been recessed in the annular groove 22 of the inner conductor 2 is released. To be done. As a result, the lock of the cable 4B with respect to the connection portion 1 is released, and the cable 4B can be pulled out from the connection portion 1.

As described above, according to the present invention, the movement of the stress cone 44 at the time of separating the cable is performed by the engaging ball 59 which has been recessed in the annular groove 22 of the inner conductor 2 and the intermediate detent tool 51. The extent to which the engagement state with the guide portion 63 is released, for example, about 10 mm, and the distance for moving the stress cone 44 to the extent that the conventional wedge tightening tool 16 can be rotated, for example, 160 mm, is stressed. The moving distance of the cone 44 is greatly reduced, and the working efficiency can be significantly improved.

[0046]

As described above, according to the present invention, the cable connecting portion of the present invention, it is possible to securely connect the cable to facilitate confirmation that the cable is locked,
When removing the cable, the movement of the stress cone can be minimized so that the cable can be separated with good work efficiency, and the structure is small and simple.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a cable connecting portion according to the present invention.

FIG. 2 is a partially enlarged view of the cable connecting portion of FIG.

FIG. 3 is a cross-sectional view illustrating the configuration of a retaining device.

FIG. 4 is a diagram for explaining a procedure for assembling a cable connecting material.

FIG. 5 is a diagram for explaining a procedure for assembling the cable connecting material.

FIG. 6 is a schematic configuration diagram of a conventional Y branch connection unit.

FIG. 7 is an enlarged view of the Y-branch connection portion of FIG.

FIG. 8 is a schematic configuration diagram showing a locked state of a conventional power cable connecting portion.

9 is a schematic configuration diagram showing a state in which the lock of the power cable connecting portion in FIG. 8 is released.

[Explanation of symbols]

1 Cable Connection (Y Branch Connection) 2 Inner Conductor (Buried Electrode) 3 Bushings 4A, 4B, 4C Cable 10 Inner Plug 11 Outer Plug 13 Contact (Multi Ram Band) 20 Inner Conductor Connection Hole 30 Bushing Receiving Hole 40 Tip conductor part 41 Protective fitting 42 Compressing device 43 Pushing fitting 44 Stress cone 50 Holding device 51 Inner holding device 53 Outer holding device 59 Locking ball 61 Intermediate holding device 63 Guide part 65 Push ring 66, 67 Compression coil spring 100A-C Cable connection material

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H02G 15/08 H02G 1/14

Claims (5)

(57) [Claims] 1. An internal conductor and a bushing integrally molded with resin around the internal conductor, wherein a connection receiving hole formed by a connection hole of the internal conductor and a receiving hole of the bushing is provided. A cable connecting part to which a terminal of a cable having a stress cone is removably mounted, is attached to a conductor of the cable, and fits into a connection hole of the inner conductor to make an electrical contact. The current-carrying part is disposed between the current-carrying part and the insulator end surface of the cable.
And a locking hole provided in the first detent tool so as to be movable.
The locking member placed and the first compression spring means with respect to the first detent.
Is movable in the axial direction of the cable, and the locking portion is
Second detaining device having a guide portion for moving the material
And via a second compression spring means to said second detent.
Is provided on the stress cone and contacts the stress cone.
And the first compression spring means is more than the second compression spring means.
It has a weak spring force , and moves the stress cone to the cable tip side.
The second detent device via the push ring.
By moving the guide member to move the locking member in the radial direction.
A recess provided in the connection hole of the inner conductor so as to project in the direction
Insert the cable into the groove and lock the cable
A cable connection part characterized by: 2. The first detent is an inner detent and
And an outer detent, and the locking hole is
And a second detent is provided on the inner detent.
Located in the annular space formed by the tool and the outer detent tool.
Has an intermediate detent for placing, the locking member is a locking ball
The cable connection part according to claim 1, wherein 3. An inner conductor and a resin around the inner conductor.
And a bushing integrally molded with
Connection formed by body connection hole and bushing receiving hole
A cable connection material is detachably attached to the receiving hole.
Oite in Bull connection portion, said cable connecting material, is arranged in cable head conductor portion
And make electrical contact by fitting to the connection hole of the inner conductor.
The current-carrying part and the connection member are arranged adjacent to the current-carrying part.
The stress cone of the charge to the side of the current-carrying part
Locks the connecting material to the cable connection
And a restraint portion that can be in a state of: the restraint portion, wherein the current-carrying portion has an inner plug arranged in a tip region of the cable tip conductor portion, and an outer plug attached to the inner plug. The portion includes a retaining device, the retaining device including a generally cylindrical inner retaining device disposed between the plug and a cable insulator end surface in a cable tip conductor portion region, and the inner retaining device. And an outer detent having a cylindrical portion concentrically arranged with the inner detainer, and an annular space formed by the inner detent and the outer detainer. An intermediate detaining tool having a guide portion disposed at a position and a spring bearing portion formed integrally with the guide portion; and a push ring disposed so as to face the spring bearing portion, A locking ball is movably arranged on the cylindrical part of the outer detainer. And a compression spring means provided between the guide portion of the intermediate detent and the outer detent, and between the spring receiving portion of the intermediate detent and the push ring. Is installed between the guide part of the intermediate detent and the outer detent.
The compression spring means is the spring of the intermediate detent device.
The compression spring means provided between the receiving portion and the push ring
It has a weaker spring force, and when the cable connecting material is mounted in the connection receiving hole, the locking ball is pushed outward in the radial direction by the guide portion and formed in the connecting hole of the inner conductor. When the cable is locked into the connecting portion by being recessed in the annular groove, and when the cable connecting material is to be released from the connecting portion,
Separate the stress cone of the cable connection material from the
In the direction in which the bushing is retracted to move the guide portion, whereby the engagement state of the engagement ball and the annular recess groove that have been recessed in the annular recess groove of the inner conductor is changed. The cable connection part characterized by releasing the lock to the connection part of the cable by releasing. 4. The inner plug is an inclined cylindrical plug having a slit formed on the outer circumference, and the outer plug is
A plug having an inclined inner surface of a shape complementary to the outer periphery of the inner plug, forming a wedge action by fitting to the inner plug, and compressing and fixing the inner plug to the tip conductor portion. The cable connecting part according to claim 3 , wherein the cable connecting part has a contact in the formed annular groove. 5. The cable connecting portion is a Y branch connecting portion, the inner conductor is substantially Y-shaped, and a Y-shaped bushing made of epoxy resin is integrally formed around the inner conductor. 5. The method according to claim 1, wherein
Cable connection described in section.