JP3129564B2 - How to assemble prefabricated connections - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prefabricated structure in which an insulating molded body is fixed to a cable connecting portion of a high-voltage transmission line, and pre-molded insulators are assembled on both sides of the insulating molded body. Regarding the method of forming the connection portion, particularly, when moving the insulating molded body along the cable, a member constituting the connection portion can be easily moved by an operator, and assembly work can be performed. And a method of assembling a prefabricated connecting portion.

[0002]

2. Description of the Related Art C used for a 275 kV high-voltage transmission line
In a V cable or the like, a conductor is connected using a conductor connection pipe, and an insulating material such as plastic is formed in a cone shape on an outer peripheral portion thereof by means such as extrusion molding. For example, in an example disclosed in Japanese Utility Model Application Laid-Open No. 58-103530, a portion where a cable conductor is connected using a conductor connection pipe and a portion around a cable connected via the conductor connection pipe extend over a predetermined range. To form a cone-shaped insulating portion, and a protective member is arranged on the outer peripheral portion thereof. However, as described above, forming an insulating portion by extruding a plastic material has a problem that a lot of time is required for forming the insulating portion.

In order to cope with the above-mentioned problem, it has been proposed that the insulating member disposed at the conductor connecting portion is configured as a so-called prefabricated joint insulating portion (hereinafter referred to as a prefabricated connecting portion). I have. In the prefabricated connection part, for example,
As shown in Japanese Patent No. 723 and the like, an insulating molded body formed of an epoxy resin material into a substantially cylindrical shape is positioned with respect to a conductor connecting tube for connecting a conductor, and a substantially cone-shaped formed of EP rubber is provided on both sides thereof. It is configured by mounting a pre-mold insulator. A prefabricated connecting portion as shown in the conventional example is generally configured as shown in FIG.

In the example of the prefabricated connection shown in FIG. 16, the conductors 2 of the two cables 1, 1a to be connected,
2a is connected using a conductor connection pipe 7, and the conductor connection pipe 7
The inner electrode 12 of the insulating molded body 11 is arranged so as to correspond to the central part of the conductor connection pipe, and the inner surface of the inner electrode 12 is fixed to the outer peripheral part of the conductor connection pipe. Further, the insulating molded body 1
The prefabricated insulators 15 and 15a are inserted into the gaps formed between the tapered portions on both sides of the cable 1 and the cable, and these three insulators are combined to form the prefabricated connection portion 10. are doing. Further, a main body case 23 is disposed on an outer peripheral portion of the prefabricated connection portion 10, and an insulator crimping device 18 is provided on both sides of the prefabricated connection portion.
Further, an insulating cylinder 22 and the like are arranged. On both sides of the main body case 23 that covers the prefabricated connection section 10, a cable protection fitting 20 and a waterproof processing section 21 are disposed so that the cable connection section can be protected.

[0005]

However, FIG.
As shown in, the operation of forming the prefabricated connection is
It is necessary to perform the operation in a clean room, and it is obligatory to perform the operation so that dust and dirt do not adhere to the joint between the insulating molded body and the pre-molded insulator. Also,
When performing the work of forming the prefabricated connection portion, after positioning and fixing the insulating molded body to the cable connection portion, work to combine the pre-molded insulator is performed, but such work is manually performed by an operator. I'm pushing. However, the member forming the prefabricated connection portion is very heavy. For example, in the case of an insulating molded body used for a 275 kV transmission line, the member is configured to be approximately 200 kg.

Therefore, when assembling the prefabricated connection part, if an operator directly pushes a heavy object by hand or performs a positioning operation, the operator's hand or an operation tool touches the surface of the insulating member. And may be hurt. In particular, since the fitting portion between the insulating molded body and the pre-molded insulator is an insulating interface that determines the performance of the prefabricated connection portion, dust adheres to the surface forming the fitting portion, It is necessary to avoid touching by workers. And to avoid such problems,
When working, it is necessary to pay sufficient attention so that the joint between the insulating molded body and the insulating member such as the pre-molded insulator is not damaged or dust adheres, and the work efficiency is greatly reduced. It is the current situation that remains.

[0007]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problem of the conventional prefabricated joint forming operation. When assembling an insulating member, an insulating molded body and a pre-molded insulating body are respectively placed on a slide base. It is an object of the present invention to provide an assembling apparatus for a prefabricated connection portion that enables an operator to easily perform an assembling operation by using a means for moving using a supporting member to be arranged.

[0008]

SUMMARY OF THE INVENTION According to the present invention, a cable conductor is connected by using a conductor connecting pipe, a plastic insulating molded body is disposed at the connecting portion, and an elastic body is formed from a side portion of the insulating molded body. The present invention relates to a method for forming a prefabricated connection portion by inserting a molded premold insulator. The invention according to claim 1 of the present invention is characterized in that before fixing the cable conductor connection portion using a conductor connection tube, a pre-molded insulator and an insulation molded body are attached to one cable and the other is attached to the other cable. Attaching a pre-molded insulator to the cable, and fixing the conductors of the two cables using a conductor connection pipe;
Positioning and fixing the insulating molded body with respect to the position of the conductor connection pipe; and pressing the insulation molded body fixed at the position of the conductor connection pipe with the cable sliding from both sides thereof. The step of pressing and combining the mold insulator, and sequentially constructed, the movement of the pre-mold insulator,
It is characterized in that a worker performs the operation in a clean case which covers the movement path of the pre-molded insulator and can be viewed from the outside while viewing from the outside of the case.

In the present invention, when the pre-molded insulator is moved inside the clean case,
Placing an insulator inserter outside the clean case, inserting a rod member driven by the inserter into the clean case, and pressing the pre-mold insulator, the pre-mold insulator along the cable. Configure the mechanism to move the body, the insulating molded body disposed in the center of the prefabricated connection, using the means to move through the support,
The work of configuring the prefabricated connection portion can be easily performed.

As described above, when forming a prefabricated connection portion by combining a premolded insulator with an insulating molded body, each insulating member is movably supported on a slide base, and the slide base is assembled. Providing the bed so as to be movable in a direction perpendicular to the axis, the work for assembling the prefabricated connection portion can be easily performed. In addition, the assembly of each insulating member constituting the prefabricated connection part is covered by using a clean case, and by working inside the case, a worker can join the joint between the insulating molded body and the premolded insulator. Since the hand and the tool do not come into contact with each other and dust and the like are prevented from adhering, the reliability of the prefabricated connection portion can be improved. And even when performing assembling work in a narrow place, such as in a cave, handling of a heavy member made up of a prefabricated connecting portion and
The assembly work of the prefabricated connection portion can be easily performed.

[0011]

Embodiment 1 As shown in FIG. 16, when a prefabricated connecting portion is formed by using a pre-molded insulating molded body and a pre-molded insulator, as shown in FIGS. Thus, a cable is connected, and each component is attached to a connection portion of the cable. When processing the connection end of the cable, as shown in FIG.
The conductors 2 and 2a are exposed at the ends of the V cables 1 and 1a. In addition, for the cable body, the insulator 3, the external semiconductive layer 4, and the external shielding layer 5 are exposed over a predetermined length to the exposed portion of the conductor 2,
The same processing as the conventional cable connection part is performed.

A conductor connecting tube 7 used to connect the conductors 2 and 2a of the two cables in a state where they face each other is:
Like the conventional conductor connection pipe, conductor insertion portions 9 and 9a are provided on both sides of the main body 8. And after inserting the conductor,
Electrical and mechanical fixing is performed by tightening the conductor insertion portions 9 and 9a, respectively. But,
In the embodiment of the present invention, as shown in FIG. 2 and subsequent figures, an operation of attaching an insulating molded body, a pre-molded insulator, or the like is performed with the conductor connection pipe 7 attached to the conductor of one of the cables. Like that.

First, as shown in FIG. 2, the pre-molded insulator forming the prefabricated connection portion of the present invention is formed into a predetermined shape, and the pre-molded insulator is accommodated in the carry-in protective case 30 in the factory. Shipped from. In a state where the pre-mold insulator 15 is housed in the carry-in protection case 30, it is kept in a state of being shut off from the outside air unless the cover 32 is removed, so that dust and the like do not enter from the outside. Is held. The carry-in protection case 30 shown in FIG. 2 is carried into a connection site while being supported by an insertion guide 33 that is arranged to protrude into the box-shaped main body. Until the pre-mold insulator 15 is fixed to the cable, a protective member 16a is mounted on the surface of the tapered portion on the insertion side of the pre-mold insulator 15, and the protective member 16a is used. By applying a pressing action, the pre-molded insulator slides against the cable. The pre-mold insulator 15 configured as described above is taken out of the case main body, and is attached to the end of the cable housed in the clean case 80 as shown in FIG.

In the example shown in FIG. 3, the conductor connection pipe 7 is attached to the conductor with respect to the connection end of the cable 1 housed in the clean case 80, as shown in FIG.
Is connected. The surface of the insertion guide 33 and the surface of the cable 1 are configured to be flush,
With the insertion guide connected to the end of the cable, the pre-mold insulator 15 is moved while sliding on the surface of the cable using the insulator inserter 50. The insulator insertion machine 5
0, the locking members 53 and 53a are respectively provided at the distal ends of the rod members 51 and 52, and the arm member is moved in a state where the locking members are locked to the end of the insertion guide 33. Thereby, the pre-mold insulator 15 is moved to the working position for forming the prefabricated connection. Further, the pre-mold insulator 15a to be attached to the other cable 1a is also the pre-mold insulator 15
Attached to the cable in the same manner as in That is, as shown in FIG. 4, the cable 1a is slid using the insulator insertion machine 50a in a state where the insertion guide 33 is connected to the end of the cable housed in another clean case 80. The prefabricated connection is moved to a preparation position for assembly.

An insulating molded body for forming a prefabricated connection portion by combining the pre-molded insulators 15 and 15a is formed by using an epoxy resin or the like as in the case of a conventional insulating molded body. As shown in FIG. 16, the internal electrodes are arranged so as to be integrally embedded in the small diameter portion at the center. The insulating molded body is configured as shown in FIG. 5, and the outer peripheral portion is configured in a substantially cylindrical shape, but the through-holes arranged inside are formed such that the diameter decreases from both sides in the axial direction. It is formed in a substantially tapered shape. A protection sheet 14 is provided on the surface of the through-hole of the insulating molded body 11 to provide means for preventing dust and the like from adhering to the surface in contact with the outer peripheral portion of the pre-molded insulator. Further, dustproof lids 11a are attached to both sides so as to close the through holes of the insulating molded body, so that dustproof during transportation can be prevented from contacting other objects.

The insulating molded body 11 having the structure as shown in FIG. 5 follows the pre-molded insulator 15 attached to the cable 1 as shown in FIG. 3 and then as shown in FIG. Then, it is attached to the cable 1 and slid along the cable 1 to a standby position for assembling the prefabricated connection portion. After that, in the state shown in FIG.
Are connected to the conductor connection pipe 7 and tightened, and as shown in FIG. 7, the work of connecting the conductors of the two cables is performed. As shown in FIG. 7, the pre-molded insulator 15 and the insulating molded body 11 are attached to one of the cables 1, and the conductors are attached to the other cable 1 with the pre-molded insulator 15 attached. After the connection is made, as shown in FIG. 8, the insulating molded body 11 is moved and positioned corresponding to the portion of the conductor connection pipe 7.

In the state shown in FIG. 7, the protection members attached to the pre-mold insulators 15 and 15 are removed so as to correspond to the assembly work of the pre-fabricated connection part. The tapered surface of the body is left covered by the protective sheet 14. As shown in FIGS. 6 and 7, when the pre-mold insulator 15 is slid in the reverse direction with respect to the cable, the locking member 53 provided at the distal end of the rod member 51 is used.
The adapter 17 is attached to the
The pressing action is provided via the.

Then, as shown in FIG. 8, the insulating molded body 11 is positioned corresponding to the position of the conductor connection pipe 7, and
After fixing the insulating molded body to the conductor connection pipe, the pre-molded insulators 15 and 15 are inserted between the tapered openings on both sides of the insulating molded body 11 and the cable surface, respectively. Prefabricated connection 1 as shown in FIG.
An operation of forming 0 is performed. When assembling the pre-molded insulator with the insulating molded body, as shown in FIG. 8, the pre-molded insulator is inserted by using an insulator inserter 50 inside a clean case 80 provided on both sides of the connection portion. Using a means for moving the body, the pre-molded insulators 15, 15 arranged on both sides of the insulating molded body 11 are pressed and moved along the cable.

When the pre-molded insulator is mounted on the insulating molded body, the protective sheet 14 covering the surface of the tapered portion of the pre-molded insulator and the surface of the opening of the insulating molded body are separated. The prefabricated connection portion is formed in a state where dust and the like do not adhere to the joint surface between the two members by removing the covering protective sheet. After forming the prefabricated connection portion, a pressing mechanism for the premolded insulator is arranged, a main body case is attached to an outer peripheral portion of the prefabricated connection portion, and cable protection is performed on both sides of the prefabricated connection portion. By arranging metal fittings and an insulating tube and performing waterproofing, an insulating portion as shown in FIG. 1 can be formed.

[0020]

Embodiment 2 Construction of the assembling apparatus As shown in FIG.
When the prefabricated joint is formed by combining these members after attaching the prefabricated insulator, the assembling apparatus 40 configured as shown in FIGS. 9 and 10.
Is used. The assembling device 40 includes a vertical and horizontal frame member 4.
An assembly bed 41 is formed by combining the components 2 and 43, and a number of drive screw members 44, 44a,... Are arranged in parallel with the vertical frame 43 of the assembly bed 41. Then, a mechanism (not shown) for rotating the driving screw member in conjunction with the driving screw member is provided, and the slide table 45 is provided so as to be movable in the arrow Y-Ya direction.

The slide table 45 is provided with a molded body support table 47 for supporting the insulating molded body 11 and the horizontal frame 4 of the assembly bed 41.
And a mechanism for guiding the molded body support 47 in the direction parallel to the direction 2 (the direction of the arrow XXa).
It constitutes a guide mechanism for moving along 6a. Also, the molded body support 47 is connected to rails 46, 46a.
Any moving mechanism can be used as the guide means for sliding the rail, and for example, a means for sliding the rail with low friction can be used. Then, the insulating molded body 11 is held on the molded body support table 47, the insulating molded body is moved along the cable, and the insulating molded body 11 can be positioned with respect to the connection portion of the cable. To

At both ends in the longitudinal direction of the assembling bed 41, insulator inserters 50 and 50a for moving the pre-mold insulators 15 and 15a along the cable are arranged. The insulator insertion machines 50 and 50a are provided so as to be movable only along the vertical frame. Then, drive screw members 44 and 44e are arranged for each of the insulator inserters 50 and 50a, and the cable supported by the insulator inserter can be moved in a direction perpendicular to the length direction. Is provided. As described above, the molded body support 47 supporting the insulating molded body 11 and the pre-molded insulators 15 and 15a, respectively, and the rod members 50 and 50a are moved in the direction perpendicular to the length direction of the cables 1 and 1a. Movably provided to the assembly device 4 with respect to the position of the cable.
Even when 0 is misaligned, positioning of the member constituting the prefabricated connection portion with respect to the cable can be easily performed.

Then, the axis of the insulating molded body 11 supported by the molded body support 47 and the insulator inserters 50, 50a
The height of each support member is adjusted so that the axis of the cable supported by each of them coincides with that of the cable, so as to correspond to the positioning and assembly work of the insulating molded body. Therefore,
In the state shown in FIG. 7 and FIGS.
The cable 1 is supported by the pre-molded insulator 15 and the insulating molded body 11 and the cable 1a is supported by the pre-molded insulator 15a to connect the cable conductors, as shown in FIG. The operation of moving the insulating molded body to the connection portion can be performed while being supported by each support member, as shown in FIGS. Also, as shown in FIG. 16, when performing the work of assembling the pre-molded insulator with respect to the insulating molded body from the state of FIG. 8, with respect to the insulating molded body 11 positioned at the center of the connection portion, Pre-mold insulators 15 and 15a arranged on both sides
Are moved using the insulator inserters 50 and 50a.

In order to move the pre-molded insulator using the insulator insertion machine, in the present invention, FIG.
12, an insulator inserter 50 configured as shown in FIG. The insulator insertion machine 50 is the same as that shown in FIG.
As shown in the figure, the drive screw member 44e and the inserter guide member 48, which are provided so as to be movable in parallel with the vertical frame of the assembling bed 41, are arranged in parallel with the vertical frame.
12 (shown in FIG. 12), the base portion 55 follows the rotation of the screw of the driving screw member, and the cable shown by the arrow Y-Ya in FIG. Is provided so as to be movable in a direction perpendicular to the axial direction.

In addition to the insulator inserting machine 50, an insulator inserting machine 50a arranged on the other side of the assembly bed 41 is arranged at the other end of the assembly bed 41,
Guided by the drive screw member 44 and the inserter guide member 48a, the arrow Y-
It is provided so that it can be moved in the direction indicated by Ya. Therefore, a large number of drive screw members 44 to 44 e arranged in the vertical direction with respect to the assembly bed 41 use a link member such as a chain to drive sprockets arranged on each drive screw member, thereby connecting cables. The members to be supported can be moved in the vertical direction in an interlocked state to correspond to the cable laid state.

In the insulator insertion machine 50, a driving device 60 supported from the base portion 55 via a leg portion 58 is disposed, and the cable 1 is held in a central opening of the driving device 60 with the cable 1 penetrating therethrough. A mechanism for performing the operation. The driving device 60 is configured by combining two substantially semicircular members of a lower member 61 and an upper member 62, and the upper member 62 is provided with a driving mechanism for the rod members 51 and 52. A driving mechanism disposed on the upper member 62 of the driving device 60 includes a driving pulley 63 for moving the rod member in the axial direction by screw engagement with the rod members 51 and 52,
64 and a toothed belt 67 for interlocking the driving member. The toothed belt 67 is attached to the upper member 6.
2 through toothed pulleys 65, 65a supported by the drive gear 2 and idler pulleys 66, 66a.
The drive pulley 63 and the drive gear 7
2 is driven via a toothed belt 73 stretched between the belts.

Further, on the side of the upper member 62, in order to transmit the rotation of the handle 70 to the drive gear 72,
A gear box 71 is arranged. Then, in the insulator inserting machine arranged on both sides of the assembling apparatus 40, when the pre-mold insulators 15 and 15a provided on the cable are moved toward the insulating molded body, the handle 70 is manually rotated. The rod members 51 and 52 are moved in the axial direction by using a transmission mechanism using the toothed belt 73 and an interlocking mechanism using the toothed belt 67 and the driving pulleys 63 and 64, and the link provided at the end of the rod member is used. The pre-molded insulator is slid along the cable via the stop. When using the insulator inserter to fix the cable and press against the pre-molded insulator, the lower member 61 of the insulator inserter was first positioned with respect to the cable and bent upward. Place the cable on the guide surface. Thereafter, the upper member 62 is arranged so as to cover the cable, and the upper and lower members 61 and 62 are fixed using bolts or the like. Then, as shown in FIG. 9, the locking members at the distal ends of the rod members 51, 52 protruding from the insulator insertion machine are positioned on the pre-mold insulator via the adapter 17, and the pre-mold insulation is performed. Try to adapt to body movements.

When moving the pre-molded insulator using the insulator insertion machine, an operator arranges the pre-molded insulator so as to cover only the working portion instead of the conventional clean room. The work of positioning the pre-molded insulators 15 and 15a with respect to the insulating molded body 11 can be performed while looking from the outside of the clean case. Therefore, the operation of combining the pre-molded insulator with the insulating molded body can be easily performed without the operator directly touching the hand. Further, the operation of positioning the pre-molded insulator at the connection portion of the cable using the assembling apparatus of FIG. 9 can be performed inside the clean case as shown in FIG. Then, the insulating molded body 11 is moved and positioned from the positions shown in FIGS. 9 and 7 to the position shown in FIG. 8, and thereafter, the portion of the movement path of the pre-molded insulator is covered with a clean case. Then, an operation of moving the pre-molded insulator toward the molded insulator is performed. In that case,
By simply rotating the handle provided on the insulator insertion machine by hand, the pre-molded insulator can be moved to a predetermined position to form a prefabricated connection portion.

In the assembling apparatus of the present invention configured as described above, the means for vertically moving in conjunction with the molded body support stand arranged on the assembling bed 41 and the insulator inserting machine is not provided. As in the above-described embodiment, in addition to the operation using the driving screw member, a moving means of another arbitrary mechanism can be provided. Further, the means for sliding the pre-molded insulator with respect to the cable, other than the one shown in the embodiment, can use any other pressing means. It is naturally possible to provide a drive mechanism by a motor instead of driving the handle. As described above, when constructing the prefabricated connection part of the present invention, using a clean case having a configuration as shown below, in a state in which it is isolated from outside air,
Assembly work can be performed.

[0030]

Embodiment 3 Structure of Clean Case As shown in FIGS. 3, 4 and 8, when the insulating molded body 11 and the pre-molded molded body 15 are attached to a cable, When the prefabricated connection portion is formed by combining members such as the above, work is performed inside the clean case. The clean case of the present invention
As shown in FIGS. 13 to 15, members that are formed in a substantially cylindrical shape are used, and by forming each member with a transparent acrylic resin or the like, the working state can be seen from the outside. As shown in FIG. 13, the clean case 80 is configured by combining a substantially cylindrical main body 81, a side member 85, and a lid member 82, and slides the side member 85 against the main body 81. By allowing movement,
The entire length L of the clean case can be adjusted. Further, in the clean case, seals 83 and 86 are arranged at respective connection portions between the side member 85 and the lid member 82 disposed on both sides of the main body so that dust and the like do not enter from the connection portions. You.

The main body 81 of the clean case 80 includes:
At a position at a predetermined distance L1 from the end where the lid member 82 is provided,
Work openings 84 and 84a are arranged, and a cover member provided with a seal can be attached to the openings. The openings 84 and 84a cover the protective sheet covering the inner surface of the tapered opening of the insulating molded body 11 and the tapered portion of the pre-molded insulator 15 when handling the insulating member inside the clean case. Used when performing work such as removing the protective sheet. When performing other operations, the opening of the clean case is closed with a lid member so that the inside can be maintained in a sealed state.

As shown in FIGS. 14 and 15, the clean case 80 is configured so that a cylinder can be formed by combining semicircular members 90 and 91. For this purpose, the side portions of both members are provided so as to be openable and closable using hinges 92..., And the stop members 93... In the clean case 80, the lid member 82 is configured as a removable lid member, but the side member 85 is provided with a cable through-hole 95 in the center of the end plate member 87 at the end, so that the insulation processing work can be performed. Is inserted into the clean case 80 through the cable through hole 95. The cable through hole 9
In addition to 5, the arm holes 96 and 97 are arranged at predetermined intervals to guide the arm member of the insulator insertion machine.

The cable through hole 95 and the arm hole 9
Numerals 6 and 97 are arranged along a straight line passing through the axis of the clean case. As shown in FIG. 15, the upper member 90 is opened via the hinge with respect to the lower member 91 of the clean case. In this state, the cable through hole and the arm hole remain in a semicircular shape along the dividing line. In addition, seals 98 and 99 are respectively arranged at the joint between the upper member 90 and the lower member 91 constituting the clean case. When the two members are combined to form a cylindrical clean case, the seals are used. A state in which the inside of the clean case is shut off from the outside air can be maintained.

Further, a seal is disposed in the through holes 95, 96, and 97 disposed in the end plate member 87 of the side member 85, so that dust is removed from gaps between the cable body and the arm inserted into the hole. Can be prevented from entering. In addition, since the arm positioned with respect to the arm hole is not only a rotating one but also has a screw formed around it, the seal disposed in the arm hole is a rotating screw. It is necessary to use a material that does not cause abrasion or decrease in sealing performance due to sliding on the member.

The clean case of the present invention configured as described above is used when a pre-molded insulator is attached to a cable as shown in FIGS. For example, when attaching the pre-molded insulator 15 to the cable 1, in a state where the insertion guide 33 is connected to the end of the cable 1, the operating members of the insulator insertion machine are combined, and as shown in FIG. Then, the upper and lower members constituting the clean case are opened and combined with the cable. At this time, first, the members of the through holes formed in the lower member 91 are connected to the cables and the arms 38 of the inserter.
Positioning is performed with respect to each of a, and thereafter, the upper member 90 is closed, and the connection portion of the cable is positioned inside the clean case. And the clean case 80
The pre-molded insulator 15 is slid with respect to the cable accommodated in the above to be fixedly held at a predetermined position.

In the state shown in FIGS. 3 and 4, after the pre-molded insulator is moved inside the clean case 80, the insertion guide left at the end of the cable is:
By opening and removing the lid member 82, the processing can be easily performed. Further, as shown in FIGS. 3 and 4, after the pre-molded insulator is attached to each cable, the work of attaching the insulating molded body 11 to one cable 1 is performed. At this time, the work can be performed with the clean case removed and the cable end exposed. Then, as shown in FIGS. 3 and 4, after attaching the pre-molded insulator to the cable, the protective member 16a covering the tapered portion of the pre-molded insulator is removed, and the tapered portion is inserted. Adapter 1 between the locking device 39 of the machine 37
7 is arranged to act to push the insulator 15 from the opposite direction and move it along the cable.

In addition to the examples shown in FIGS. 3 and 4, according to the present invention, as shown in FIG. 8, a clean case is used even in the final stage of forming an insulating portion.
An operation of combining the pre-molded insulator with the positions on both sides of 1 is performed. In the final assembly process shown in FIG. 8, the tapered portion of the pre-molded insulator is inserted into the tapered opening on both sides of the insulating molded body 11 fixed to the cable connection portion. When combining them, the work should be performed inside the clean case. In the example shown in FIG.
The insulating molded body 11 is fixed to the portion of the conductor connection pipe 7 to which the conductor a is connected, and the clean cases 80 and 80 are removed while covering the end of the insulating molded body 11 and the pre-molded insulator, respectively. Place each. Then, an assembling operation can be performed while preventing dust and the like from entering a portion where the insulating member is formed by combining those members.

As shown in FIG.
Until the pre-mold insulator is combined, the surface of the joint of each member is kept covered with a protective sheet. Then, when performing the assembling work of the insulating member, after removing the protective sheets covering the tapered portions of the respective members, the pre-molded insulator is pressed against the insulating molded body 11 at the center. To assemble. When removing the protective sheet covering the tapered portion of each member, as shown in FIG. 13, the opening provided in the body of the clean case is opened, and the worker inserts his hand, By removing the protective sheet, the tapered joint is first exposed. Thereafter, the pre-molded insulator is moved toward the insulating molded body 11, and the three members can be combined to form an insulating member.

As described above, when constructing the prefabricated connection portion of the present invention, the clean case 80 as described above is used.
In the state where the outside air and the connecting portion are cut off inside the clean case 80, the connecting portions of the members constituting the insulating portion are matched with each other, so that the connecting portion of the insulator constituting the connecting portion is formed. To prevent dust and the like from entering the device. In addition, the clean case of the present invention is large enough to accommodate the cable body and the insulating molded body, and thus can be easily used in a narrow place such as in a sinus. Furthermore, when the clean case is carried into a narrow place in the tunnel, or when the clean case is combined in the tunnel, the clean case of the present invention is formed in a small size, Can be divided, so that it can be easily handled.

It should be noted that the clean case of the present invention configured as described above is arbitrarily sized according to the size of the cable, the size of the insulating member constituting the prefabricated connection part, and the like. Can be. Further, the arrangement position of the working opening formed in the main body of the clean case, the size of the opening, and the like can be arbitrarily configured according to the work. In addition to manufacturing the entire clean case using a transparent material, only the main body may be formed of a transparent member, and the other members may be formed of a translucent or opaque material.

[0041]

The method for assembling the prefabricated connection according to the present invention is as follows.
As described above, when forming the prefabricated connection portion by combining the premolded insulator with the insulating molded body, each insulating member is movably supported on the slide table, and the slide table is placed on the assembly bed. By being provided so as to be movable in a direction perpendicular to the shaft, the assembling work of the prefabricated connection portion can be easily performed. In addition, the assembly of each insulating member constituting the prefabricated connection part is covered by using a clean case, and by working inside the case, a worker can join the joint between the insulating molded body and the premolded insulator. Since the hand and the tool do not come into contact with each other and dust and the like are prevented from adhering, the reliability of the prefabricated connection portion can be improved. When the assembling work is performed in a narrow place, such as in a cave, even when the weight of the members forming the prefabricated connection portion is large, the handling and the assembling work of the prefabricated connection portion can be easily performed.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an initial step of cable connection.

FIG. 2 is an explanatory view showing a state of a pre-molded insulator used in the present invention before shipment from a factory.

FIG. 3 is an explanatory diagram showing a state where a pre-molded insulator is transferred to one cable.

FIG. 4 is an explanatory view showing a state in which a pre-mold insulator is transferred to the other cable.

FIG. 5 is a side view of an insulating molded body used in the present invention.

FIG. 6 is an explanatory view showing a state in which a cable supports an insulating molded body.

FIG. 7 is an explanatory diagram showing a state where two cables are connected.

FIG. 8 shows an example of an insulating molded body positioned at a connection portion.
It is explanatory drawing which shows the state which incorporates a pre-mold insulator.

FIG. 9 is a plan view of the assembling apparatus of the present invention.

FIG. 10 is a side view of FIG. 9;

FIG. 11 is a front view of the insulator insertion machine of the present invention.

FIG. 12 is a side view of the insulator insertion machine of FIG.

FIG. 13 is a side view of the clean case of the present invention.

FIG. 14 is a sectional view of a clean case of the present invention.

FIG. 15 is an explanatory diagram showing a state where a clean case is opened.

FIG. 16 is an explanatory diagram showing a configuration of a general prefabricated connection unit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cable, 2 conductors, 7 conductor connection pipe, 10 prefabricated connection part, 11 insulation molded object, 1
2 internal electrode, 15 pre-mold insulator, 25 sleeve fixing bracket, 30 protective case, 33 insertion guide, 40 assembling device, 41 assembling bed, 44
Drive screw member, 45 slide base, 47 molded body support base, 50
Insulator insertion machine, 51/52 rod member, 55 base, 57
Slide member, 60 drive device, 63/64 drive pulley, 67/73 toothed belt, 80 clean case.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hirofumi Kangami 3-7-1, Chibune, Nishiyodogawa-ku, Osaka-shi, Osaka Mitsubishi Cable Industry Co., Ltd. Construction Department (56) References JP-A-4-255410 (JP, A ) Japanese Utility Model Application Sho 60-121141 (JP, U) Japanese Utility Model Application Hei 4-47324 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02G 1/14 H02G 15/08

Claims (2)

(57) [Claims] 1. A cable conductor is connected by using a conductor connection tube, a plastic insulation molded body is arranged at a connection portion, and a pre-molded insulator molded by an elastic body is inserted from a side portion of the insulation molded body. When forming the prefabricated connection portion by using a conductor connection tube, the cable conductor connection portion is mounted with a pre-molded insulator and an insulating molded body on one cable, and the other cable is fixed. Mounting a pre-molded insulator on the conductor, fixing the conductors of the two cables using a conductor connection tube, and positioning and fixing the insulation molded body with respect to the position of the conductor connection tube. A step of pressing and combining a pre-molded insulator in a state of sliding on a cable from both sides of the insulating molded body fixed at the position of the conductor connection pipe, The movement of the remolded insulator covers a portion of the movement path of the premolded insulator, and is performed in a clean case that can be seen from outside by an operator while looking from the outside of the case. Assembly method. 2. When moving a pre-molded insulator inside the clean case, an insulator inserter is arranged outside the clean case, and a rod member driven by the inserter is inserted into the clean case. Then, a mechanism is configured to move the pre-mold insulator along the cable by pushing the pre-mold insulator, and the insulating molded body disposed at the center of the prefabricated connection portion is moved via the support base. 2. The method for assembling a prefabricated connection part according to claim 1, wherein the operation of configuring the prefabricated connection part is performed without using an operator.