JP2001286021A - Optical composite lead-in wire and its constitution method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical composite lead-in wire which can lead an optical fiber to a general home at low cost. SOLUTION: An optical composite lead-in wire 15 is constituted by accompanying the whole or a part of a power lead-in cable 6 with a redundant optical unit 10 which is cut longer than a power lead-in wire 6 laid. The end of the optical unit 10 is opened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical composite lead-in line, which is a structure for wiring an optical unit having an optical fiber covered with at least a protective coating from an optical cable to a building in each home, and a method of forming the same. It is.

[0002]

2. Description of the Related Art At present, optical cables are not wired to ordinary households. However, in the near future, it will be necessary to wire optical fibers to ordinary homes.

[0003]

SUMMARY OF THE INVENTION When it is time to wire an optical fiber to a general home, starting the work from that point is extremely time consuming, costly and inefficient. Become.

An object of the present invention is to provide an optical composite drop-in line which can lead an optical fiber into ordinary households at low cost, and a method of configuring the same.

It is another object of the present invention to provide an optical composite drop-in line which can easily cope with the need for wiring an optical fiber to a general home and a method of configuring the same.

Another object of the present invention is to provide an optical composite drop-in line which does not cause any trouble even if the optical unit has an open end.

Another object of the present invention is to provide an optical composite lead-in line that can lead an optical unit to a general home at low cost.

It is another object of the present invention to provide an optical composite lead-in line which can prevent damage of an optical unit in a laid state.

Another object of the present invention is to provide an optical composite lead-in line capable of easily holding an extra length of an optical unit while maintaining an allowable bending radius.

[0010]

According to a first aspect of the present invention, there is provided an optical composite drop-in line, wherein the optical unit cut into a longer length than the laid power drop-in line and having an extra length,
It is characterized by being attached to all or a part of the power service line.

In the present invention, the optical unit has a structure in which the optical fiber is coated with at least a protective coating, and may or may not have the tension member integrated. The number of optical fibers in the optical unit may be one or more.

When the optical unit is pulled in along with the power drop line as described above, the optical unit can be pulled in at low cost by using the power drop line as support means. Also,
Since the optical unit has an extra length, the connection operation can be easily performed by utilizing the extra length.

[0013] In the optical composite drop-in line according to the second aspect, the optical unit cut into a longer length than the laid power drop-in line and having a surplus length has all or part of the power drop-in line. And the end of the optical unit is an open end.

When the optical unit is pulled in along with the power drop line, the optical unit can be pulled in at low cost by using the power drop line as support means. Since this optical unit has an end as an open end, when it is necessary to wire an optical fiber to a general home, connect one end of the optical unit, which is standing by as a drop-in wire, to an optical cable, By connecting the other end to the equipment in the home, it becomes possible to easily and efficiently cope with the necessity of wiring the optical fiber to the general home. In addition, since the optical unit has an extra length, the connection operation can be easily performed by using the extra length.

According to a third aspect of the present invention, there is provided an optical composite service line, wherein an open end of the optical unit according to the second aspect is subjected to waterproof treatment.

By waterproofing the open end of the optical unit in this way, it is possible to prevent the end of the optical unit from being damaged by water.

According to a fourth aspect of the present invention, there is provided an optical composite service line, wherein the optical unit according to the first, second or third aspect is directly attached to the power service line.

When the optical unit is directly attached to the power supply line in this way, the structure of the optical unit is simplified, and the optical unit can be pulled into a general household at low cost.

According to a fifth aspect of the present invention, there is provided an optical composite service line, wherein the optical unit according to the first, second or third aspect is attached to the power service line via a pipe or a protector.

When the optical unit is attached to the power lead-in line via the pipe or the protector, the pipe or the protector can prevent the optical unit from being damaged in a laid state.

According to a sixth aspect of the present invention, there is provided an optical composite drop-in line, wherein the extra length of the optical unit according to the first, second, third, fourth or fifth aspect is held by the extra length holding portion. .

When the extra length portion of the optical unit is held by the extra length holding portion in this manner, the extra length portion of the optical unit can be easily held while maintaining the allowable bending radius.

According to a seventh aspect of the present invention, there is provided a method of constructing an optical composite service line, in which an optical unit is cut with a length longer than a laid power service line and an extra length, and the optical unit is connected to the power service line. Characterized in that it is attached to all or part of.

When the optical unit is retracted along the power supply line, the optical unit can be retracted at low cost by using the power supply line as a support means. Also,
Since the optical unit has an extra length, the connection operation can be easily performed by utilizing the extra length.

[0025]

1 to 3 show an embodiment of an optical composite drop-in line according to the present invention. FIG. 1 is a perspective view showing a retracted state of the optical composite drop-in line of the present embodiment. FIG. 2 is a cross-sectional view of the optical composite drop-in line of the present embodiment, and FIG. 3 is a cross-sectional view of a waterproofing portion at an end of the optical unit used in the optical composite drop-in line of the present example.

At present, a three-phase or two-phase low-voltage distribution line 5 is installed on an arm 3 of a telephone pole 2 via an insulator 4 in order to distribute power to the building 1 of each home. Telephone pole 2 and building 1
Between them, a three-phase or two-phase power lead-in line 6 is twisted at a loose pitch and installed. Each of the power drop lines 6 is wound around and fixed to a retaining insulator 7 at a position near both ends thereof. One retaining insulator 7 is retained on the utility pole 2 by a retaining wire 8, and the other retaining insulator 7 is It is erected by retaining the building 1 with the retaining wire 8. Each power drop line 6 is connected to an integrated wattmeter 9 of the building 1.

The optical unit 10 which is cut into a length longer than the power drop line 6 drawn in in this way and has a surplus length has a pitch smaller than the allowable bending radius at a loose pitch in the power drop line 6. It is wrapped and attached so that it does not become. Note that the optical unit 10 can also be supported without being wound around the power lead-in line 6 by using a ring-shaped stopper or a binding line. Optical unit 10
Has a structure in which the optical fiber is coated at least with a protective coating, and may or may not have the tension member integrated. Also, the optical unit 10
One or a plurality of optical fibers may be used. Both ends of the optical unit 10 are open ends 10a, and the open ends 10a of the optical unit 10
1, a waterproof layer 12 formed by winding a waterproof tape over the entrance of the synthetic resin cap 11 and the optical unit 10 is provided, and a waterproof processing section 13 is provided.
On the utility pole 2 side, the extra length portion 10b at one end of the optical unit 10 is accommodated in the optical connection box 14 supported by the utility pole 2 in a loop with a bend radius larger than the allowable bend radius. Also on the building 1 side, an optical connection box 14 is provided so as to be supported by the building 1, and the extra length portion 10b at the other end of the optical unit 10 is looped in the optical connection box 14 with a bending radius equal to or larger than the allowable bending radius. Housed.

In this example, an optical composite service line 15 is constituted by the power service line 6 and the optical unit 10.

Next, a description will be given of a method of configuring the optical composite drop-in line 15. First, the optical unit 10 is cut with an extra length longer than the installed power service line 6. The optical unit 10 is pulled into the building 1 along the whole or a part of the power supply line 6 while being loosely wound around the power supply line 6 laid in advance.

As described above, the optical composite drop-in line 15 of this embodiment
In this case, since the optical unit 10 is retracted along the power supply line 6, the optical unit 10 can be retracted at low cost by using the power supply line 6 as a supporting means. Since this optical unit 10 has an end as an open end 10a, when it becomes necessary to wire an optical fiber to a general home, one end of the optical unit 10 which is standing by as a drop-in wire is connected to a power pole 2. By connecting to the optical cable laid in the building and connecting the other end to the equipment in the building 1, that is, the home, when the work of wiring the optical fiber to the general home becomes necessary, it can be easily and efficiently performed. Can be made to correspond. Further, since the optical unit 10 has an extra length, the connection operation can be easily performed by utilizing the extra length.

When the trunk of the optical cable is laid in advance, one end of the optical unit 10 may be connected to the trunk, and the other end of the optical unit 10 may be subjected to waterproof treatment with the other end being an open end.

Next, various examples of the structure of the optical unit 10 will be described.

FIG. 4 is a perspective view showing a first example of the optical unit 10. In the optical unit 10, a shape-retaining metal wire 17 is attached in parallel to one or a plurality of optical fibers 16 as a shape-maintaining wire, and the optical fiber 16 and the shape-maintaining metal wire 17 are made of polyethylene or polyvinyl chloride. The protective cover 18 is made of a synthetic resin such as nylon, nylon, or tetrafluoroethylene, and has a gourd-shaped cross section. The shape maintaining metal wire 17 is grounded as necessary. The end of the optical fiber 16 is waterproofed by a waterproofing unit (not shown).

In the optical unit 10 having such a structure, when it is wound around the outer periphery of the power lead-in line 6, it is held in the wound shape due to the presence of the shape maintaining metal wire 17.

FIG. 5 is a perspective view showing a second example of the optical unit 10. In the optical unit 10, polyethylene covering the shape-retaining metal wire 17 as the shape-retaining wire,
A pipe 20 made of a synthetic resin such as polyvinyl chloride, nylon, or tetrafluoroethylene is provided. The pipe 20 has a gourd shape in which the shape-retaining metal wires 17 are integrally formed in parallel and integrally, and the optical unit 10 is drawn into the pipe 20. The end of the optical unit 10 is waterproofed by a waterproofing unit (not shown). The shape maintaining metal wire 17 is grounded as necessary.

Even when the optical unit 10 having such a pipe 20 is wound around the outer periphery of the power lead-in line 6, it is held in the wound shape due to the presence of the shape holding metal wire 17. In the optical unit 10 having the pipe 20, the above-described waterproofing section can be configured by closing the end of the pipe 20 in a watertight manner with an adhesive or the like.
When a pipe 20 for protecting the optical unit 10 is provided,
The pipe 20 can prevent the optical unit 10 from being damaged in a laid state.

In the first and second examples, the power service line 6
As long as the shape can be retained by being wound around the outer periphery, a wire made of a synthetic resin can be used as the shape retaining wire.

FIG. 6 is a perspective view showing a third example of the optical unit 10. The optical unit 10 is provided with a protective coating 18 such as polyethylene, polyvinyl chloride, nylon, or tetrafluoroethylene which covers one or a plurality of optical fibers 16, so that the optical unit 16 can be three-phase or two-phase.
A split pipe 21 for accommodating the phase power supply line 6 is integrally formed. The end of the optical fiber 16 is waterproofed by a waterproofing unit (not shown).

In such an optical unit 10, the pipe 2
1 opens the split part 21 a and covers the power drop line 6. The split portion 21a of the pipe 21 is closed by closing means (not shown).

When the two pipes 21 are provided as described above, the pipes 21 can be easily supported by being fitted to the power lead-in line 6.

FIG. 7 is a perspective view showing a fourth example of the optical unit 10. The optical unit 10 includes a protector 19 made of a synthetic resin such as polyethylene, polyvinyl chloride, nylon, or tetrafluoroethylene. The protector 19 connects a split pipe 22 to a split pipe 20. It is shaped like a gourd. The optical unit 10 is drawn into the pipe 20. The end of the optical unit 10 is waterproofed by a waterproofing unit (not shown).

In such an optical unit 10 as well, the pipe 2
2 opens the split part 22 a and covers the power drop line 6. The split portion 22a of the pipe 22 is closed by closing means (not shown).

Also in this example, since the protector 19 is provided with the cut-in pipe 22, it can be easily supported by being fitted to the electric power lead-in line 6. Since the protector 19 that protects the optical unit 10 is provided, the protector 19 can prevent the optical unit 10 from being damaged in a laid state.

FIG. 8 is a perspective view showing a fifth example of the optical unit 10. The optical unit 10 intermittently or continuously extends in a longitudinal direction on a protective coating 18 such as polyethylene, polyvinyl chloride, nylon, or tetrafluoroethylene which covers one or a plurality of optical fibers 16.
Are integrally formed, and the stopper portion 2
4 has a structure in which it is continuously provided. The end of the optical fiber 16 is waterproofed by a waterproofing unit (not shown).

In such an optical unit 10, the cord portion 23 is passed between the three-phase or two-phase power lead-in lines 6, and is supported and retained by the retaining portion 24.

Even such an optical unit 10 can be easily supported by the power drop line 6.

FIG. 9 is a perspective view showing a sixth example of the optical unit 10. The optical unit 10 includes a pipe 20 made of a synthetic resin such as polyethylene, polyvinyl chloride, nylon, or tetrafluoroethylene. The pipe 20 has a structure in which a string portion 23 formed intermittently or continuously in the longitudinal direction thereof and a retaining portion 24 connected to the tip of the string portion 23 are provided. The optical unit 10 is drawn into the pipe 20. Optical unit 1
The end of 0 is waterproofed by a waterproofing unit (not shown). This waterproofing process can be performed by closing the end of the pipe 20.

Such an optical unit 10 also has a pipe 20
In the state protected by the above, the cord portion 23 is passed between the three-phase or two-phase power lead-in lines 6 and is retained and supported by the retaining portion 24.

Even such an optical unit 10 can be easily supported by the power drop line 6.

FIG. 10 is a perspective view showing a seventh example of the optical unit 10. The optical unit 10 accommodates a three-phase or two-phase power drop line 6 by a protective coating 18 such as polyethylene, polyvinyl chloride, nylon, or tetrafluoroethylene which covers one or a plurality of optical fibers 16. It has a structure in which a split pipe 21 is integrally formed. The optical fiber 16 is accommodated in a thick part of the pipe 21. The end of the optical fiber 16 is waterproofed by a waterproofing unit (not shown). Pipe 21
Is structured so that when the split portion 21a is closed, it is locked so as not to open.

Such an optical unit 10 also includes a pipe 21
Is opened to cover the power drop line 6.

Even such an optical unit 10 can be easily supported by the power drop line 6.

FIG. 11 is a perspective view showing an eighth example of the optical unit 10. This optical unit 10 is made of polyethylene,
A protector 19 made of a synthetic resin such as polyvinyl chloride, nylon, or tetrafluoroethylene is provided. The protector 19 forms an interrupted pipe 22, and a pipe 20 is formed within the thickness of the pipe 22. The optical unit 10 is drawn into a pipe 20. The end of the optical unit 10 is waterproofed by a waterproofing unit (not shown). The three-phase or two-phase power service line 6 is housed in a pipe 22. This pipe 22
Also, when the split part 22a is closed, it is locked so as not to open.

Such an optical unit 10 also has a
a is opened, and the pipe 22 is put on the power drop line 6.

Even such an optical unit 10 can be easily supported by the power drop line 6.

The pipe 2 shown in FIGS.
By providing a large number of slits along the circumferential direction of the pipes 21 and 22, the flexibility of the pipes 21 and 22 is improved, and the pipes 21 and 22 can be easily wound around the power drop line 6. When a large number of slits are formed in the pipes 21 and 22 in this manner, the required flexibility can be obtained even if the material of the synthetic resin forming the pipes 21 and 22 is somewhat hard.

FIG. 12 is a perspective view showing a ninth example of the optical unit 10. The optical unit 10 includes one or a plurality of optical fibers 16 formed of polyethylene, polyvinyl chloride,
A rod-shaped member coated with a protective coating 18 made of a synthetic resin such as nylon or tetrafluoroethylene is bent into an SZ shape. The end of the optical fiber 16
Although not shown, the waterproof processing is performed by a waterproof processing unit.

The optical unit 10 bent in such an SZ shape is fitted to the power supply line 6 and supported by the power supply line 6.

Even such an optical unit 10 can be easily supported by the power drop line 6.

At this time, a pipe or protector made of a synthetic resin (polyethylene, polyvinyl chloride, nylon, tetrafluoroethylene, or the like) bent into an SZ shape is provided on the power drop line 6, and the light is inserted into the pipe or the protector. A unit 10 can also be accommodated.

FIG. 13 is a perspective view showing a tenth example of the optical unit 10. As shown in FIG. The optical unit 10 is formed by bending one or a plurality of optical fibers 16 into a coil shape by covering the optical fiber 16 with a protective coating 18 made of a synthetic resin such as polyethylene, polyvinyl chloride, nylon, or tetrafluoroethylene. It has a structure. The end of the optical fiber 16 is waterproofed by a waterproofing unit (not shown).

The optical unit 10 bent in such a coil shape is fitted to any part of the power supply line 6 in the longitudinal direction and supported by the power supply line 6.
When it becomes necessary to wire the optical fiber to a general home, the coil-shaped optical unit 10 is extended so as to extend along the entire length of the power drop line 6 in the longitudinal direction.
Is connected to an optical cable, and the other end is connected to equipment in the building 1, that is, at home.

Also in this example, a pipe or protector made of a synthetic resin (polyethylene, polyvinyl chloride, nylon, tetrafluoroethylene, or the like) bent into a coil shape is provided, and the optical unit 10 is provided in the pipe or protector. Can be accommodated.

Next, examples of the structure of the optical unit 10 suitable for pulling the optical unit 10 together when the power lead-in line 6 is pulled in will be described.

FIG. 14 is a cross-sectional view showing an eleventh example of the optical unit 10. The optical unit 10 has a gourd shape in which a synthetic resin coating 26 covering a one-phase conductor 25 of a three-phase power drop line 6 covers one or a plurality of optical fibers 16. . Both ends of the optical unit 10 are open ends, and the open ends of these optical units 10 are also waterproofed by a waterproofing section.

According to such an optical unit 10, the optical unit 10 can be pulled in at the same time as the power drop line 6 is pulled in.

FIG. 15 is a transverse sectional view showing a twelfth example of the optical unit 10, and FIG. 16 is a perspective view of the power drop line 6 provided with the optical unit 10 used in the twelfth example. The optical unit 10 also has a synthetic resin coating 26 covering the one-phase conductor 25 of the three-phase power drop line 6 as in the eleventh example.
Covers one or more optical fibers 16,
It has a gourd shape. The optical unit 10 is integrated with the power drop line 6 in a meandering state. Both ends of the optical unit 10 are also open ends.
The open end of 0 is also waterproofed by the waterproofing section.

As described above, when the optical unit 10 is integrated with the power supply line 6 in a meandering state, it is possible to avoid applying tension to the optical unit 10.

FIG. 17 is a perspective view showing a thirteenth example of the optical unit 10. As shown in FIG. In this example, the conductors 25 of the three-phase power drop line 6 are covered with a common synthetic resin coating 26 and integrated into a tape shape, and the synthetic resin coating 26 is formed of one or a plurality of optical fibers. The optical unit 10 is also configured by covering the fiber 16. The optical unit 10 is integrated with the power drop line 6 in a meandering state. This optical unit 10
Are open ends, and the open ends of these optical units 10 are also waterproofed by a waterproofing section.

Since the three-phase power drop line 6 including the optical unit 10 is integrally formed as a whole, the first
It is possible to easily pull in the power from the power drop line 6 of the first example or the twelfth example.

FIG. 18 is a cross-sectional view of a fourteenth example of the optical unit 10 showing a state before being integrated with the power drop line 6, and FIG.
FIG. 3 is a cross-sectional view showing a state after integration.

The optical unit 10 is provided with a gourd-shaped protector 19 in which a non-slit pipe 27 accommodating the three-phase power drop line 6 and a split pipe 28 are integrated. This protector 19
It is formed of a synthetic resin such as polyethylene, polyvinyl chloride, nylon, or tetrafluoroethylene, and is formed in a state in which the three-phase power supply line 6 is accommodated in the pipe 27. In the split pipe 28, the split section 28a is opened to open the optical unit 10 as shown in FIG.
Is housed. The optical unit 10 has a structure in which a plurality of optical fibers 16 are covered with a coating resin 18.

As described above, the protector 1 is connected to the power service line 6.
If the power cable 9 is covered, the protector 19 can be pulled in together when the power service line 6 is drawn. The optical unit 10 is inserted into the pipe 28 of the protector 19 by opening the split portion 28a and inserting the optical unit 10. The pipe 27 of the protector 19 may be divided. If the pipe 27 is divided, the protector 19
Can be easily attached to the power drop line 6.

FIG. 20 is a cross-sectional view of a fifteenth example of the optical unit 10 showing a state before being integrated with the power drop line 6, and FIG.
FIG. 3 is a cross-sectional view showing a state after integration.

The three-phase power supply line 6 is accommodated in a pipe 29 made of a synthetic resin such as polyethylene, polyvinyl chloride, nylon, or tetrafluoroethylene. On a part of the outer periphery of the pipe 29, a concave joint 30 is formed of the same synthetic resin along the longitudinal direction. The optical unit 10 has a structure in which a convex joint 31 protrudes from a part of the outer periphery of the protective coating 18 covering one or a plurality of optical fibers 16.

When the concave joint 30 is provided on the outer periphery of the pipe 29 accommodating the three-phase power service line 6, the convex joint 31 is connected to the joint 30 as shown in FIG. Thus, the optical unit 10 can be supported. The pipe 29 may be divided. If the pipe 29 is divided, the pipe 29 can be easily attached to the power drop line 6.

FIG. 22 is a perspective view showing a modified example of the pipe 20 into which the optical unit 10 is drawn. This pipe 20
Has a protrusion 20a protruding radially on the inner surface. When the projections 20a are projected radially on the inner surface of the pipe 20, the resistance when the optical unit 10 is pulled in can be reduced. Note that these projections 20a may be formed in a spiral shape. Alternatively, the pipe 20 may be formed by a corrugated pipe corrugated in a ring shape or a spiral shape.

FIG. 23 shows an extra length of the optical unit 10 in a retaining screw fitting 32 for fixing the retaining wire 8 for retaining the power drop line 6 via the retaining insulator 7 as shown in FIG. It is a side view which shows the example in which the extra length holding | maintenance part 33 which consists of a bobbin which winds 10b with a radius larger than an allowable bending radius is supported. The retaining screw fitting 32 has a wire retaining ring 32a for retaining the retaining wire 8 at the head thereof.

When such a retaining screw fitting 32 is used, the extra length holding portion 33 of the optical unit 10
b can be wound and held with a radius equal to or greater than the allowable bending radius.

FIG. 24 shows an extra length holding bobbin that winds the extra length portion 10b of the optical unit 10 with a radius greater than the allowable bending radius around the retaining insulator 7 that retains the power drop line 6 as shown in FIG. It is a side view which shows the example which provided the part 33 integrally.

Even with such a surplus length holding portion 33, the surplus length portion 10b of the optical unit 10 can be wound and held with a radius larger than the allowable bending radius.

Since the integrating wattmeter 9 shown in FIG. 1 is usually mounted on a plate, the optical unit 10 is rotated around the integrating wattmeter 9 by using the integrating wattmeter 9 and the plate to have an allowable bending radius or more. Can be wound and held at a radius of.

[0083]

According to the first aspect of the present invention, there is provided an optical composite service line.
Since the optical unit that is cut to a length longer than the laid power drop line and has an extra length is attached to all or a part of the power drop line, the power drop line is used as support means. Thus, the optical unit can be pulled in at low cost. In addition, since the optical unit has an extra length, the connection operation can be easily performed by using the extra length.

In the optical composite drop-in line according to the second aspect, the optical unit cut to a length longer than the laid power drop-in line and having a surplus length may be all or a part of the power drop-in line. Therefore, the optical unit can be pulled in at low cost by using the power lead-in line as the support means. Since this optical unit has an end as an open end, when it is necessary to wire an optical fiber to a general home, connect one end of the optical unit, which is standing by as a drop-in wire, to an optical cable, By connecting the other end to a household device, it is possible to easily and efficiently cope with this. In addition, since the optical unit has an extra length, the connection operation can be easily performed by using the extra length.

According to the third aspect of the present invention, since the open end of the optical unit according to the second aspect is waterproofed, the end of the optical unit is prevented from being damaged by water. can do.

In the optical composite drop-in line according to the fourth aspect, since the optical unit according to the first, second or third aspect is directly attached to the power drop-in line, the structure of the optical unit is simplified and the cost is reduced. The light unit can be pulled into a general home.

In the optical composite drop-in line according to the fifth aspect, the optical unit according to the first, second or third aspect is attached to the power drop-in line via a pipe or a protector. Damage of the unit in the laid state can be prevented.

In the optical composite drop-in line according to the sixth aspect, since the extra length of the optical unit according to the first, second, third, fourth or fifth aspect is held by the extra length holding portion, The extra length portion can be easily held by holding the allowable bending radius.

According to a seventh aspect of the present invention, there is provided a method of constructing an optical composite drop-in line, in which an optical unit is cut with a longer length than the installed power drop-in line, and the optical unit is disconnected from the power drop-in line. The optical unit can be pulled in at low cost by using the power lead-in line as a support means. In addition, since the optical unit has an extra length, the connection operation can be easily performed by using the extra length.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an embodiment of an optical composite service line according to the present invention.

FIG. 2 is a cross-sectional view of the optical composite service line of the present embodiment.

FIG. 3 is a cross-sectional view of a waterproofing portion at an end of an optical unit used in the optical composite drop-in line of the present embodiment.

FIG. 4 is a perspective view showing a first example of an optical unit.

FIG. 5 is a perspective view showing a second example of the optical unit.

FIG. 6 is a perspective view showing a third example of the optical unit.

FIG. 7 is a perspective view showing a fourth example of the optical unit.

FIG. 8 is a perspective view showing a fifth example of the optical unit.

FIG. 9 is a perspective view showing a sixth example of the optical unit.

FIG. 10 is a perspective view showing a seventh example of the optical unit.

FIG. 11 is a perspective view showing an eighth example of the optical unit.

FIG. 12 is a perspective view showing a ninth example of an optical unit.

FIG. 13 is a perspective view showing a tenth example of an optical unit.

FIG. 14 is a cross-sectional view showing an eleventh example of the optical unit.

FIG. 15 is a cross-sectional view showing a twelfth example of the optical unit.

FIG. 16 is a perspective view of a power service line including an optical unit used in the twelfth example.

FIG. 17 is a perspective view showing a thirteenth example of the optical unit.

FIG. 18 is a cross-sectional view of a fourteenth example of the optical unit in a state before being integrated with the power drop line.

FIG. 19 is a cross-sectional view of a fourteenth example of the optical unit showing a state after being integrated with the power drop line.

FIG. 20 is a cross-sectional view of a fifteenth example of the optical unit in a state before being integrated with the power drop line.

FIG. 21 is a cross-sectional view of a fifteenth example of the optical unit showing a state after being integrated with the power drop line.

FIG. 22 is a perspective view showing a modified example of a pipe into which an optical unit is drawn.

FIG. 23 is a side view in which an extra length holding portion for winding an extra length portion of the optical unit is supported on a retaining screw fitting for fixing the retaining wire.

FIG. 24 is a plan view in which an extra length holding portion is provided integrally with a retaining insulator to be retained.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Building 2 Power pole 3 Arm clamp 4 Insulator 5 Low voltage distribution line 6 Power lead-in line 7 Detention insulator 8 Detention wire 9 Integrated power meter 10 Optical unit 10a Open end 10b Extra length 11 Synthetic resin cap 12 Waterproof layer 13 Waterproof treatment part DESCRIPTION OF SYMBOLS 14 Optical connection box 15 Optical composite lead-in line 16 Optical fiber 17 Metal wire for shape retention 18 Protective coating 19 Protector 20 Pipe 20a Projection 21,22 Pipe 21a, 22a Splitting part 23 String part 24 Retaining part 25 Conductor 26 Synthetic resin coating 27 , 28, 29 Pipe 28a Splitting part 30 Concave joint 31 Convex joint 32 Detent screw fitting 32a Wire locking ring 33 Extra length holding part

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H02G 1/06 305 H02G 7/02 F 7/02 G02B 6/00 351 (72) Inventor Yasuyoshi Kondo Aichi 1, Chubu Electric Power Co., Inc., Higashi-ku, Higashi-ku, Nagoya-shi, Japan (72) Inventor Akihiro Niwa 1, Higashi-Shinmachi, Higashi-ku, Nagoya, Aichi, Japan 1 Chubu Electric Power Co., Inc. (72) Inventor Takashi Kijima 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd. (72) Inventor Makoto Tago 2-6-1 Marunouchi, Chiyoda-ku, Tokyo No. Furukawa Electric Co., Ltd. (72) Inventor Yoshiyuki Kamata 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd. (72) Inventor Yuichi Sekii 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd. (72) Inventor Ichiro Kobayashi 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd. (72) Inventor Yoshiteru Takeda 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd. 1440, Mukurosaki-shi Fujikura Co., Ltd. Sakura Plant F-term (reference) 2H001 BB05 BB26 DD06 DD09 KK17 2H038 AA21 CA65 5G367 DA03 DB07 DB08 DB12 DC03

Claims (7)

[Claims] 1. An optical unit cut to a length longer than a laid power service line and having an extra length,
An optical composite drop line attached to all or a part of the power drop line. 2. An optical unit which has been cut to a length longer than a laid power service line and has an extra length,
An optical composite service line attached to all or a part of the power service line, wherein an end of the optical unit is an open end. 3. The optical composite drop-in line according to claim 2, wherein the open end of the optical unit is waterproofed. 4. The optical composite drop-in line according to claim 1, wherein the optical unit is directly attached to the power drop-in line. 5. The optical composite drop-in line according to claim 1, wherein the optical unit is attached to the power drop-in via a pipe or a protector. 6. The extra length portion of the optical unit is held by an extra length holding portion.
Or the optical composite drop-in line according to 5. 7. An optical unit is cut with an extra length longer than a laid power drop line, and the optical unit is attached to all or a part of the power drop line. Configuration method of optical composite drop line.