KR102243944B1 - Underground transmission line connection device with various functions - Google Patents

Abstract

The present invention relates to a device for supporting an underground distribution line. The device for supporting an underground distribution line includes a fixing unit (20), a lift (30), a buoyancy body (40) and a connector unit (50) buried in the ground and accommodated therein, and a protection box (10) that protects the distribution line (L) that are electrically connected from an external force, wherein the fixing unit (20) is fixed to the inner bottom surface of the protection box 10 buried in the ground through a fixing means (e.g., an anchor bolt), the lift (30) is installed to be lifted on a guide rod (21) of the fixing unit (20) to support the connector unit (50), and stably supports and protects the cable (C) drawn into the inside, the buoyancy body (40) is attached to the lower surface of a base (31) of the lift (30) and floats on water, and the connector unit (50) is detachably installed on the lift (30) and electrically interconnects and fixes the power distribution line (L) drawn in through the protection box (10). According to this embodiment, when seepage water penetrates into the inside of the protection box, the buoyancy body naturally elevates, thereby minimizing contact with the penetrating water as the connector units installed on the lift and electrically interconnecting the distribution lines are raised and lowered. Accordingly, it is possible to safely protect the connection state of the distribution line from accidents such as electric short due to seepage water.

Description

Underground transmission line connection device with various functions}

The present invention relates to an underground power distribution line support device, and more specifically, it is possible to prevent an electric short circuit accident by allowing the connection part of the distribution line to be buoyant when infiltrating water inflow, and separate cables such as telephone lines and communication lines. A space for mounting has been provided to greatly enhance the convenience of installation, and it is related to an underground distribution line support device that can greatly improve the convenience of work by enabling installation and electrical connection without removing the cover of the distribution line.

High-voltage electricity transmitted from power plants or substations is converted to a certain voltage and then distributed to consumption areas. For this purpose, transformers and switchboards are installed as ground equipment for distribution in roadsides and parks on the ground.

In addition, as a means to support the ground equipment for distribution, a facility commonly referred to as a protective box is installed.

In general, the protection box is formed of concrete and has a shape of a case with an open top, and a plurality of holes are formed on the side of the box for inlet and outlet of underground power distribution lines and various cables.

Accordingly, infiltrating water, foreign matter, soil, etc. can easily enter the inside through the hole in the side of the protection box, and in some cases, small animals such as rats may enter the protection box, which is the underground distribution line and various cables in the protection box. It is a factor that impairs stable installation and maintenance.

As such a conventional basis, there is Korean Patent Registration No. 10-1594067 (basement installation structure of an underground distribution line), which can smoothly enter the underground distribution line and block the inflow of foreign substances from the outside. The technology is disclosed.

However, in the case of the prior art, when infiltrating water is introduced from the outside, there is no means to substantially protect the connection part of the distribution line, so it is very susceptible to accidents such as an electric short circuit.

Therefore, research to solve this problem is still actively underway.

1. Korean Patent Registration No. 10-1594067 (2016.02.04)

The present invention has been conceived to solve the above problems, and it is possible to prevent electric short circuit accidents by allowing the connection part of the distribution line to be buoyant when infiltrating water flows in, and separate cables such as telephone lines and communication lines. The purpose of this is to provide a support device for underground distribution lines that can greatly improve the convenience of work because installation and electrical connection are possible without removing the cover of the distribution line. .

The present invention for achieving the above object,

It is buried in the ground, and a distribution line consisting of a conducting wire and a covering is introduced to the inside, and a box-shaped outer body with the inside open upwards,

A protective box consisting of a cover for opening and closing the opened upper part of the outer body;

Fixing base provided with a plurality of guide rods protruding upward and fixed to the inner bottom surface of the outer body;

A base installed to be elevating and descending through a coupling hole on the guide rod,

A holder cradle integrally formed on the upper surface of the base, the inside of which forms a'V' shape with both ends and an upward opening, has a coupling groove formed along the length direction of the inner bottom surface, and has a locking step integrally formed at both ends,

A lifting platform consisting of a rubber body part mounted on the upper surface of the holder cradle with a fitting protrusion detachably inserted into the coupling groove, and a holder made of rubber elastic threads that are arranged in multiple rows along the upper surface of the body part to hold cables. ;

A buoyancy body disposed between the stationary platform and the platform to lift the platform through buoyancy;

A tubular insulating case that is divided into a first body portion and a second body portion having a semicircular cross-section and is mutually coupled through a hinge,

It is formed integrally with the outer circumference of the first body part and is arranged to be opened and closed in the opening of the holder cradle, and the first tool inlet groove is formed to face each other so that the tool can be inserted and removed from the outer circumferential surface. And a connector consisting of a hook that is detachably fixed to the locking jaw,

Distribution wires are inserted through both ends so as to be removably accommodated inside the insulation case, and disk-shaped plunges disposed at both ends of the insulation case are integrally formed on the outer circumferential surfaces of both ends, and the longitudinal direction of the outer circumferential surface is formed between the plunges. Accordingly, the wire insertion ports of insulating material are arranged in a row at regular intervals so that each through-hole communicating with the inside faces each other,

An elastic sealing pad formed on the inner surface of the insulating case,

They are arranged opposite to each other with respect to the electric wire insertion port and intervene between the electric wire insertion port and the sealing pad, and the inner circumferential surface is in close contact with the outer circumferential surface of the electric wire insertion port by the pressure of the insulation case, and the outer circumferential surface is in close contact with the inner circumferential surface of the sealing pad, and the first tool inlet groove A second tool entry groove in communication with the arc plate having a semicircular cross section provided at both ends, protruding from the inner circumferential surface of the arc plate, and being inserted into the through hole so as to be lifted up and down, penetrates the cover of the distribution line, is inserted into the conductor, and fixes the distribution line by biting it. It is composed of a conductive material wire connector that electrically interconnects the distribution lines,

It characterized in that it comprises a; is installed in the insulating case, a connector unit consisting of a clamp that regulates the rotation of the first and second body parts.

According to this embodiment, when the infiltrating water flows into the protection box, the buoyant body naturally lifts and descends, thereby minimizing contact with the infiltrating water as the connector unit installed on the platform and electrically interconnecting the distribution lines is lifted and lowered. In this way, it is possible to safely protect the connection state of the distribution line from accidents such as an electric short circuit caused by infiltrating water.

In addition, when the cable (communication line and telephone line) is inserted through the elastic ribs for the construction of the cable, the elastic ribs that have been bent by the cable pressurize and hold the cable through the elastic force, so that the cable can be stably held, and in particular, the cable is elastic. Since the holder is made of a rubber material when it is inserted through the flesh, it is possible to prevent damage to the cable's sheath, so it is possible to fundamentally block the cause of a short circuit caused by damage to the sheath.

In addition, since the cable is fixed through the holder, the problem of the cable being entangled to one side can be fundamentally improved. In addition, since the cable can be individually separated and fixed, it is possible to easily find the corresponding cable during maintenance work. There is an advantage that can be drastically shortened.

In addition, as the lancet of the connector unit penetrates the sheath of the distribution line and is inserted into the conductor wire, even if an external force (tensile force) acts on the distribution line, it is possible to suppress the separation to the outside as much as possible, and furthermore, the sheath moves the distribution line together with the lancet. Because it is limited, it is possible to further suppress the deviation of the distribution line.

Furthermore, when the lancet penetrates the sheath, the circumferential surface of the lancet is naturally wrapped and sealed by the sheath.

1 is a view showing the installation state of the underground distribution line support device according to the present invention.
2A and 2B are perspective and bottom perspective views of an underground power distribution line support device according to the present invention.
3 is an exploded perspective view of an underground distribution line support device according to the present invention.
4A and 4B are enlarged views of the main parts of the underground distribution line support device according to the present invention by separately extracting the lifting platform.
5A and 5B are an exploded perspective view and a combined cross-sectional view showing a separate extract of a connector unit in an underground distribution line support device according to the present invention.
6A to 6E are views sequentially showing a process of connecting distribution lines using an underground distribution line support device according to the present invention.
7 is a view for explaining a process of withdrawing a distribution line from the underground distribution line support device according to the present invention.

Hereinafter, it will be described in detail with reference to the accompanying drawings.

1 is a view showing an installation state of an underground distribution line support device according to the present invention, FIGS. 2A and 2B are a perspective view and a bottom perspective view of the underground distribution line support device according to the present invention, and FIG. 3 is an underground distribution line according to the present invention. An exploded perspective view of the supporting device, and FIGS. 4A and 4B are enlarged views of the main parts obtained by separately extracting the lifting platform from the underground distribution line supporting device according to the present invention, and FIGS. 5A and 5B are the connector units in the underground distribution line supporting device according to the present invention. It is an exploded perspective view and a combined cross-sectional view showing a separate excerpt.

1 to 5B, the underground power distribution line support device according to the present invention is composed of a protection box 10 and a fixture 20, a lifting platform 30, a buoyancy body 40, and a connector unit 50, According to this, it is possible to prevent electric short circuit accidents by allowing the connection part of the distribution line (L) to be buoyant when infiltrating water inflow, and to provide a space for separately mounting cables (C) such as telephone lines and communication lines. The convenience of installation has been greatly reinforced, and it can be installed and electrically connected without removing the cover (Lb) of the distribution line (L), which greatly improves the convenience of work. Since the structure Lb) is constrained together, it is possible to more reliably secure the separation of the distribution line L, and there is a technical feature of sealing naturally as the covering Lb surrounds the penetrating lancet 14b.

Referring to FIG. 1, the protection box 10 is composed of an outer body 11 and a cover 12, and in the case of the present embodiment, a fixture 20, a lift platform 30, and a buoyancy body are buried in the ground and accommodated therein. It functions to protect 40 and the connector unit 50 and the electrical distribution line L that is electrically connected from an external force.

The outer body 11 has a rectangular parallelepiped shape with the inside opening upward, and holes are formed on both sides thereof, through which the distribution line L and the cable C are introduced.

The cover 12 is installed to be openable and closed on the opened upper portion of the outer body 11.

1 to 3, the fixing base 20 is fixed to the inner bottom surface of the protection box 10 buried in the ground through a fixing means (eg, anchor bolt), and has a predetermined width and thickness as a whole. It is manufactured in the form of a plate having, and the upper surface is integrally formed with four guide rods 21 extending upward, and in this guide rod 21, a lifting platform 30, which will be described later, mediates the coupling hole 31a. It is inserted so that it can be raised or lowered.

1 to 3, the lifting platform 30 is composed of a base 31, a holder cradle 32, and a holder 33, and in the case of this embodiment, it is lifted on the guide rod 21 of the fixture 20 It is installed as possible to support the connector unit 50, and serves to stably support and protect the cable (C) that is introduced into the inside.

The base 31 is a rectangular member having a predetermined width and thickness, and a coupling hole 31a fitted to correspond to the guide rod 21 is integrally formed at the edge thereof.

The holder cradle 32 is integrally formed on the upper surface of the base 31 and serves to support the connector unit 50, and has a'V' shape with the inside open at both ends and upwards, and the inner bottom A coupling groove (32a) is integrally formed along the longitudinal direction on the surface, and locking projections (32b) are integrally formed at both ends.

The holder 33 is a member made of a rubber (silicon) material consisting of a body portion 33a and an elastic flesh 33b, and in the case of the present embodiment, a cable C ) Stably supports and protects.

The body portion (33a) is manufactured in a shape corresponding to the inner cross-sectional shape of the holder cradle (32), is placed on the upper surface (inner surface) of the holder cradle (32) and adheres to it, and is detachably fitted to the coupling groove (32a) on the lower surface. The supporting protrusion 33a-1 is integrally formed.

The elastic flesh 33b serves to hold the cable C, which is arranged in multiple rows along the upper surface of the body portion 33a, and is introduced into the inner side through an elastic force.

As an example, when the cable (C: communication line and telephone line) is inserted between the elastic ribs 33b for temporary construction, the elastic ribs 33b bent by the cable C connect the cable C through the elastic force. Since the cable (C) is held under pressure, the cable (C) can be stably held. In particular, the holder (33) is made of rubber material when the cable (C) is inserted through the elastic ribs (33b). Since it can prevent damage to the covering, there is a technical feature that can fundamentally block the cause of the occurrence of a short circuit due to damage to the covering.

In addition, since the cable (C) is fixed through the holder (33), it is possible to fundamentally improve the problem of the cable (C) being pulled to one side and tangled, and in addition, the cable (C) can be individually separated and fixed. Therefore, the cable (C) can be easily found during maintenance work, so there is an advantage in that the working time can be drastically reduced.

1 to 3, the buoyancy body 40 is a styrofoam floating in water, and in this embodiment, it is attached and fixed to the lower surface of the base 31 of the elevator 30.

1 to 3 and 5A and 5B, the connector unit 50 includes an insulating case 51 and a connector 52, an electric wire insertion port 53, a sealing pad 54, and an electric wire connector 55. And a clamp 56, in the case of the present embodiment, which is detachably installed on the hoisting table 30 and serves to electrically interconnect and fix the distribution line L drawn in through the protection box 10.

The insulating case 51 is divided into a first body part 51a and a second body part 51b having a semicircular cross section, and are mutually coupled through a hinge (not shown), and rotated around the hinge. It has a structure that opens or closes to form a tubular shape. In addition, a semicircular plunge portion 51c extends toward the center on the inner circumferential surfaces of both ends of the first body portion 51a and the second body portion 51b, so that the sealing pad 54 and the wire connector ( 55).

The connector 52 is composed of a plate portion 52a and a hook portion 52b, and in the present embodiment, it is detachably coupled to the holder holder 32 to interconnect the insulating case 51 and the lifting platform 30 Do it.

The plate portion 52a is a plate integrally formed on the outer circumferential surface of the first body portion 51a and has a predetermined thickness disposed to be opened and closed in the opening of the holder holder 32, and the hook portion 52b is the plate portion 52a. ) It is a member that is bent downward from both ends of the locking projection (32b) and detachably coupled.

As an example, when the plate portion 52a is disposed in the upper surface opening of the holder holder 32 and the hook portion 52b is hooked to the locking projection 32b of the holder holder 32, the connector 52 Since it is naturally mounted on the holder cradle 32, the connector unit 10 can be easily mounted on the lifting platform 30.

The wire insertion port 53 is a member of a cylindrical insulating material that is divided into space by a partition plate 53c integrally formed in the interior and is opened at both ends with respect to the partition plate 53c. ) Are not electrically contacted with each other due to the diaphragm 53c. A disk-shaped plunge 53a is integrally formed on the outer circumferential surfaces of both ends of the electric wire insertion port 53, and a tool for separating the electric wire connector 55 from the electric wire insertion port 53 on the outer circumferential surface of the plunge 53a (e.g. : Rod-shaped driver, etc.) are formed to face each other so that the first tool inlet groove (53a-1) is formed to be inserted and detachable, and the plunges (53a) are arranged in a row at regular intervals along the longitudinal direction of the outer circumferential surface. As such, through-holes 53b each communicating with the inside are formed to face each other.

Here, the plunge 53a is disposed outside the plunge portion 51c provided at both ends of the insulating case 51 to limit the movement of the insulating case 51, and the through hole 53b is a wire It serves to guide the upward movement to the needle 55b of the connection port 55.

The sealing pad 54 is a soft and elastic member such as silicone, rubber, etc., and is attached to the inner surface of the insulating case 51 in the case of this embodiment, and the circumference of the wire connector 55 when the insulating case 51 is pressed. It is airtightly adhered to the surface to prevent the inflow of infiltrating water from the outside.

The wire connector 55 is a member of a conductive material composed of an arc plate 55a and a needle 55b, and is intervened between the wire insertion port 53 and the sealing pad 54 in the case of the present embodiment. It is moved by pressurization and serves to prevent separation of the distribution line L while electrically interconnecting the distribution line L.

The arc plate 55a is a member having a semicircular cross section, and is disposed opposite to each other with respect to the wire insertion port 53 and intervenes between the wire insertion port 53 and the sealing pad 54, and the arc plate 55a is arranged in this way. By pressing the silver insulating case 51, the inner circumferential surface is in close contact with the outer circumferential surface of the wire insertion port 53, and the outer circumferential surface is in close contact with the inner circumferential surface of the sealing pad 54. In addition, at both ends of the arc plate 55a, a second tool entry groove 55a-1 communicating with the first tool entry groove 53a-1 is integrally formed, and a second tool entry groove 55a-1 is formed integrally. 1 As the tool (e.g., a rod-shaped screwdriver) inserted through the tool entry groove (53a-1) is inserted and detachably inserted, the arc plate from the electric wire insertion port (53) using a tool (e.g., a rod-shaped screwdriver, etc.) (55a) was separated and then allowed to separate.

The lancet 55b is a conical member, protruding from the inner circumferential surface of the arc plate 55a and being fitted to the through hole 53b so as to be lifted and lowered, and together by the movement of the arc plate 55a by pressing the insulating case 51. It is moved along the through hole 53b, penetrates the sheath (Lb) of the distribution line (L), and is plugged into the conductor line (La), thereby electrically connecting the distribution line (L) to each other while biting and fixing the distribution line (L). Do it.

For example, when the electric wire connector 55 is pressed with the insulating case 51 while the distribution line L is inserted into the electric wire insertion port 53, the arc plate 55a is moved by the pressure of the insulating case 51. As a result, the needle 55b naturally moves, and the needle 55b moves along the through hole 53b to penetrate the sheath Lb of the distribution line L to be inserted into the conductor La. Accordingly, the conductors La of the pair of distribution lines L are electrically connected to each other through the needle 55b and the arc plate 55a.

In addition, as the needle 55b penetrates the sheath (Lb) of the distribution line (L) and is inserted into the conductor line (La), even if an external force (tensile force) acts on the distribution line (L), it is possible to minimize the separation to the outside. In addition, since the covering Lb limits the movement of the distribution line L together with the needle 55b, the separation of the distribution line L can be further suppressed.

In addition, when the needle 55b penetrates the covering Lb, a side effect of sealing while the circumferential surface of the needle 55b is naturally wrapped by the covering Lb can be expected.

The clamp 56 is a known coupling device that regulates the rotation of the first and second body parts 51a and 51b, and a hook-shaped hook 56a is installed on the outer circumferential surface of the first body part 51a. A fastening part 56b is installed on the outer circumferential surface of the two-body part 51b, and since this clamp 56 is a technique well known in the art, a detailed description thereof will be omitted.

6A to 6E are views sequentially showing a process of connecting a distribution line using an underground distribution line support device according to the present invention, and FIG. 7 is a diagram for explaining a process of drawing out a distribution line from the underground distribution line support device according to the present invention. As a drawing, it will be described with reference to this as follows.

Referring to FIG. 6A, first, the distribution line L covered with the sheath Lb to the end of the conducting wire La is pushed inward through both ends of the wire insertion port 53.

6B and 6C, when the distribution line L is inserted into the electric wire insertion port 53 as described above, the electric wire connection ports 55 are respectively disposed on the outer circumferential surface of the electric wire insertion port 53 to pinch the wire connection port 55. In a state in which 55b is inserted into the through hole 53b, the wire insertion port 53 is inserted into the first body portion 51a constituting the insulating case 51.

For reference, as shown in FIG. 6B, the insulating case 51 may be installed on the holder holder 32 of the lifting platform 30 via the connector 52 in advance, and the distribution line using the connector connection unit 50 After connecting (L) to each other, the connector connection unit 50 may be installed on the lift platform 30.

When the wire insertion port 53 is inserted into the first body part 51a as described above, the open second body part 51b is rotated through the hinge to press the wire connector 55.

At this time, the arc plate 55a is moved by the pressure of the insulating case 51, and the needle 55b is also moved along the through hole 53b by the movement of the arc plate 55a to cover the distribution line L. The wire (La) of the distribution line (L) passes through (Lb) and is inserted into the wire (La), and accordingly, the wire (La) of the distribution line (L) is electrically connected to each other via the needle (55b) and the arc plate (55a).

6D and 6E, as described above, when the hinge is rotated around the hinge and the ends are butted to each other, the clamp 56 composed of a hook 56a and a fastening part 56b formed on the outer circumferential surface of the insulating case 51 It is sufficient to fix the insulating case 51 so that it does not open.

On the other hand, if you want to replace the distribution line L due to aging or disconnection, you can open the insulation case 51 in the reverse order of the aforementioned method. It is not easy to separate the wire connector 55 from the wire insertion port 53 because it is embedded in the sheath (La) and the lead wire (Lb).

In this case, as shown in FIG. 7, in a state in which a tool (eg, a rod-shaped driver, etc.) is inserted into the first tool entry groove 53a-1 and the second tool entry groove 55a-1 communicated with each other When it is tilted using the principle of a lever, the wire connector 55 is lifted by a tool (eg, a rod-shaped driver, etc.) and separated from the wire insertion port 53, so that the distribution line (L) can be separated from the wire insertion port 53. I can.

On the other hand, when infiltrating water flows into the protection box 10 in the state installed as described above, the buoyant body 40 is floated by buoyancy by the infiltrated water, thereby forming an integral type with the buoyant body 40. The lift platform 30 is raised and lowered along the guide rod 21 of the fixing table 20, and accordingly, the connector unit 50 installed on the lift table 30 is naturally wired to the distribution line (L) and the lift platform 30 as it moves up and down. The old cable (C) is also raised and lowered.

Therefore, when the infiltrating water flows in, the connector unit 50 electrically interconnecting the distribution line L is elevated by the buoyancy body 40 to avoid contact with the infiltrating water. It will be able to provide safe protection from accidents.

According to this embodiment, when the infiltrating water flows into the inside of the protection box 10, the buoyancy body 40 naturally lifts and descends, thereby being installed on the hoisting platform 30 to electrically interconnect the distribution line L. As the connector unit 50 moves up and down, contact with the seepage water can be minimized, and accordingly, the connection state of the distribution line L can be safely protected from accidents such as an electric short circuit caused by the seepage water.

In addition, when the cable (C: communication line and telephone line) is inserted between the elastic ribs 33b for temporary construction, the elastic ribs 33b bent by the cable C press the cable C through the elastic force. The cable (C) can be stably held because it is detained. In particular, when the cable (C) is inserted through the elastic ribs (33b), the holder (33) is made of rubber, so the sheath of the cable (C) is damaged. It is possible to prevent leakage, so it is possible to fundamentally block the cause of electric leakage due to damage to the coating.

And since the holder 33 is fixed through the cable (C), the problem of the cable (C) being pulled to one side and tangled can be fundamentally improved, and in addition to this, the cable (C) can be individually separated and fixed. There is an advantage in that the working time can be drastically shortened because the cable (C) can be easily found during maintenance work.

In addition, as the needle 55b of the connector unit 50 penetrates the sheath (Lb) of the distribution line (L) and is plugged into the conductor line (La), the external force (tensile force) acts on the distribution line (L). The separation of the furnace can be suppressed as much as possible, and furthermore, since the coating Lb limits the movement of the distribution line L together with the needle 55b, the separation of the distribution line L can be further suppressed.

Further, when the needle 55b penetrates the covering Lb, a side effect of sealing while the circumferential surface of the needle 55b is naturally wrapped by the covering Lb can be expected.

The present invention has been described in detail only with respect to the described specific embodiments, but it is natural for those skilled in the art that various modifications and modifications can be made within the scope of the technical idea of the present invention, and it is natural that such modifications and modifications belong to the appended claims.

10: protection box 11: outer body 12: cover
20: fixing rod 21: guide rod 30: lifting rod
31: base 31a: coupling hole 32: holder holder
32a: coupling groove 32b: locking jaw 33: holder
33a: body portion 33a-1: fitting projection 33b: elastic flesh
40: buoyancy body 50: connector unit 51: insulation case
51a: first body part 51b: second body part 51c: plunge part
52: connector 52a: plate portion 52b: hook portion
53: wire insertion port 53a: plunge 53a-1: first tool entry hole
53b: through hole 53c: diaphragm 54: sealing pad
55: wire connection port 55a: plate 55a-1: second tool entry hole
55b: needle 56: clamp 56a: hook
56b: fastening part

Claims (1)

A distribution line (L) made of a conductor (La) and a covering (La) is inserted into the ground and is inserted into the inside, and the box-shaped outer body 11 with the inside open upwards,
A protective box 10 consisting of a cover 12 for opening and closing the opened upper part of the outer body 11;
Fixing base 20 provided with a plurality of guide rods 21 protruding upward and fixed to the inner bottom surface of the outer body 11;
A base 31 installed to be elevating through a coupling hole 31a in the guide rod 21,
It is integrally formed on the upper surface of the base 31, the inside of which forms a'V' shape that is opened upwards with both ends, and has a coupling groove 32a formed along the length direction of the inner bottom surface, and locking projections 32b are formed at both ends. ) And the holder cradle 32 integrally formed,
Multi-row along the upper surface of the rubber body part (33a) and the body part (33a) that are mounted on the upper surface of the holder holder (32) by having a fitting protrusion (33a-1) that is detachably fitted to the coupling groove (32a) A hoisting platform 30 composed of a holder 33 made of elastic flesh 33b made of rubber material which is disposed in a row and holds the cable C;
A buoyancy body 40 disposed between the fixed base 20 and the lifting platform 30 to lift the lifting platform 30 through buoyancy;
It is divided into a first body part 51a and a second body part 51b having a semicircular cross section, and are mutually coupled through a hinge, but the inner circumferential surfaces of both ends of the first and second body parts 51a and 51b have a semicircular shape. A tubular insulating case 51 in which the plunge portion 51c extends toward the center,
It is integrally formed on the outer circumferential surface of the first body part 51a and is formed integrally with both ends of the plate part 52a and the plate part 52a, which is formed to be opened and closed in the opening of the holder holder 32, and is attached to and detached from the locking protrusion 32b. And a connector 52 made of a hook portion 52b fixed to be possible,
Distribution lines (L) are respectively inserted through both ends to be removably accommodated in the interior of the insulating case 51, and are disposed at both ends of the insulating case 51 on the outer circumferential surfaces of both ends, respectively, on the outer circumferential surface so that the tool can be inserted detachably. A disk-shaped plunge 53a in which the first tool inlet grooves 53a-1 are opposed to each other is formed integrally, and between the plunges 53a are arranged in a row at regular intervals along the length direction of the outer circumferential surface. A wire insertion port 53 made of an insulating material in which the through hole 53b communicating with the inside is formed to face each other,
A sealing pad 54 having elasticity formed on the inner surface of the insulating case 51,
It is disposed opposite to each other based on the wire insertion hole 53 and intervened between the wire insertion hole 53 and the sealing pad 54, and the inner circumferential surface is in close contact with the outer circumferential surface of the wire insertion hole 53 by the pressure of the insulation case 51. , The outer circumferential surface is in close contact with the inner circumferential surface of the sealing pad 54 and the arc plate 55a having a semicircular cross section provided at both ends of the second tool entry grooves 55a-1 that are in close contact with the first tool entry grooves 53a-1 , The lancet 55b which protrudes from the inner circumferential surface of the arc plate 55a and is inserted into the through hole 53b so that it can be lifted, penetrates the sheath (Lb) of the distribution line (L) and is inserted into the conductor line (La) to bite and fix the distribution line (L). ) And a conductive material wire connector 55 that electrically interconnects the distribution line (L),
And a connector unit (50) comprising a clamp (56) installed in the insulating case (51) to regulate the rotation of the first and second body parts (51a, 51b).

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