JP2005202246A - Laying structure and method of fiber cable, and maintenance method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laying structure of a fiber cable, a laying method, and a maintenance method capable of enhancing the safety and operation efficiency of a maintenance operation by facilitating a maintenance operation such as extension works of branching drop lines, a conduction test operation and a repair operation with regard to an optical fiber cable. <P>SOLUTION: The fiber cable laying structure 10 is to lay a fiber cable 5, and is composed of a pair of fastening means 2, 2 fixed to a utility pole 1 as a structure; a pair of support lines 31, 31 which are fastened and stretched to each of a pair of the fastening means 2, 2; a dam part 4 which connects the fiber cable to a pair of the support lines 31, 31; and a large number of fixation parts 6 which fix a slack part 51 of the fiber cable 5 between the fastening means 2, 2 to a pair of the support lines 31, 31 in the state of winding the slack part 51. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a laying structure, a laying method, and a maintenance method for an optical fiber cable that is laid while being supported by a structure such as a utility pole or a wall surface of a building.

  Conventionally, an optical fiber cable or the like is laid while being supported on a utility pole or a wall surface of a building. As a technique for this laying, for example, there is a self-supporting optical cable disclosed in Patent Document 1.

In this self-supporting optical cable disclosed in Patent Document 1, a fiber cable covered with a sheath made of a resin material such as polyethylene is disposed around an optical fiber in parallel with a support wire such as a steel wire or a stranded wire, and a dam The fiber cable is laid by connecting support lines between the buildings.
JP-A-10-90570

  However, in the conventional fiber cable laying method described above, since the laid fiber cable is laid at a high place such as the top of a utility pole, for example, it is already dropped from the fiber cable for a new subscriber. There was a problem that maintenance work such as extension work such as branching lines, continuity testing work, and repair work had to be done at high places.

  Conventionally, work in high places uses a bucket car with a gondola that reaches the high place, but in some dense residential areas the bucket car may not be able to enter. In this case, it is necessary to use a ladder or the like was there. Since the work on the ladder is unstable, when the work is performed for a long time, there is a danger, and workability is deteriorated and the work is delayed.

  Therefore, the present invention has been made in view of the above points, and in an optical fiber cable, maintenance work such as extension work such as branching a drop line, continuity test work, repair work, etc. is easily performed. It is an object of the present invention to provide a fiber cable laying structure, a laying method, and a maintenance method that can improve safety and work efficiency.

  In order to solve the above-mentioned problems, the present invention is a structure for laying a fiber cable, and a pair of fastening means fixed to the structure and a pair of tension means fastened to each of the pair of fastening means The support wire, the dam portion that connects the fiber cable to the pair of support wires, and the fixing portion that is fixed to the structure in a state where the extra length portion of the fiber cable between the fastening means is wound. .

  The second invention is a method of laying a fiber cable, a step of tightly connecting a pair of support wires to a structure and supporting the fiber cable by the pair of support wires, and a pair of tightly connected And a step of fixing the extra length of the fiber cable between the support wires to the structure in a wound state.

  A third invention is a maintenance method for a laid fiber cable, wherein the fiber cable is fixed in a state where an extra length of the fiber cable is wound around a pair of support wires that are tightly connected to a structure and stretched. Are supported by a pair of support lines, the fixing of the extra length portion is released, and the extra length portion is suspended, and a maintenance process is performed at the lower end of the extra portion that is suspended.

  According to the present invention, when the fiber cable is tightly attached to the structure, the extra length is secured to the fiber cable at the tightness portion, and the extra length portion is fixed in a wound state. By releasing the fixing, the extra length can be suspended near the ground. As a result, it is possible to carry out maintenance work such as extension work such as branching a drop line, continuity test work, and repair work on the ground.

  In the above invention, the fiber cable is connected to one support line by the dam part, the pair of support lines is formed by cutting off the middle part of one support line, and the extra length part is the fiber cable, It is preferable that it is the part connected with the deleted middle part. In this case, since the fiber cable and the support wire are integrated with the dam portion in advance, the fiber cable can be easily transported and laid, and when the structure is tightened, the middle portion of the support wire By cutting off, an extra length portion of any position and length can be formed in the fiber cable. As a result, it is possible to adjust the formation mode of the extra length portion according to the height of the structure and the distance between the structures, and it is possible to perform work according to the situation at the site.

  In the said invention, it is preferable that many dam parts are arrange | positioned at predetermined intervals on both sides of a slit. In this case, by forming slits, it is possible to reduce the influence of crosswinds acting on the support line and the weight of the cable, and to reduce the cutting length of the dam part. The workability at the time of separating can be improved.

  The extra length portion can be fixed in a case body that is accommodated in a state where the extra length portion is wound and fixed to a pair of support wires. In this case, the fiber cable can be protected by the case body, and the work for fixing and releasing the extra length can be facilitated.

  As described above, according to the present invention, the maintenance work of the optical fiber cable can be performed on the ground, the maintenance work can be easily performed, and the safety and efficiency of the maintenance work can be improved. it can.

(Configuration of fiber cable laying structure)
Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram showing a fiber cable laying structure according to the present embodiment, wherein (a) is a side view thereof, (b) is a top view thereof, and (c) is an integrated fiber cable and support line. It is sectional drawing of the converted sheath.

  As shown to the figure (a) and (b), the fiber cable laying structure 10 which concerns on this embodiment is for laying the fiber cable 5, and is a pair of fixed to the utility pole 1 which is a structure. Tightening means 2, 2, a pair of support wires 31, 31 that are fastened to each of the pair of tightness means 2, 2, and a dam portion 4 that connects a fiber cable to the pair of support lines 31, 31 And a plurality of fixing portions 6 fixed to the pair of support wires 31 in a state where the extra length portion 51 of the fiber cable 5 between the fastening means 2 and 2 is wound.

  In this embodiment, the fiber cable 5 is covered and integrally molded with a support line and the dam portion 4 with a resin material such as polyester. Moreover, the dam part 4 is arrange | positioned at predetermined intervals on both sides of the slit 41. FIG.

  In the present embodiment, the pair of support lines 31, 31 are formed by cutting off the middle part of one support line 3, and the extra length part 51 is formed in the middle part of the fiber cable 5 that has been deleted. It is a connected part. This will be described later.

  In this embodiment, the fastening means 2 and 2 are curved so as to match the outer peripheral surface of the utility pole 1, and a pair of clamp parts 21 and 21 for gripping the utility pole 1, and at both ends of these clamp parts 21 and 21. The clamps 21 and 21 are fixed to the utility pole 1 by a bolt nut 22 for connecting and fixing, a pulley 23 pivotally supported by the bolt nut 22, and tightening wires 24 and 24 wound around the pulley 23. The binding means 2 has a check structure inside thereof, and when the support wire 31 is inserted, the support wire 31 is gripped by using a reaction force against the tension acting in the axial direction of the support wire 31 and does not come off. It is like that.

  The fixing unit 6 can be used, for example, by winding a tight wire such as a wire, but may be a clip having a strong gripping force.

(Fiber cable laying method)
Next, the procedure of the fiber cable laying method using the fiber cable laying structure having the above configuration will be described. FIG. 2 is an explanatory diagram showing the procedure of the fiber cable laying method according to the present embodiment.

  Here, as described above, the fiber cable 5 in the present embodiment is connected to the single support wire 3 by the multiple dam portions 4 arranged at predetermined intervals with the slit 41 interposed therebetween, and is integrated by the sheath 7. Use what was done.

  First, as shown in FIG. 2A, the dam portion 42 disposed in the midway portion 32 of one support line 3 is cut at 42a, and the 3a portion of the support line 3 is cut. The midway part 32 is excised by. By being divided by the cut portion 3a, a pair of support lines 31, 31 are formed as shown in FIG. 5B, and the end portions 31a, 31a of the pair of support lines 31, 31 are drawn close to each other. By doing so, the portion of the fiber cable 5 connected to the midway portion 32 becomes the extra length portion 51.

  Next, as shown in FIG. 3C, the end portions 31a and 31a of the pair of support wires 31 and 31 are fastened to the fastening means 2 and 2 fixed to the utility pole 1, and the support wires 31 and 31 are connected. Install. As a result, the fiber cable 5 is supported by the pair of support wires 31. Further, the extra length portion 51 of the fiber cable 5 formed by the end portions 31 a and 31 a being pulled toward each other is fixed to the pair of support wires 31 and 31 by the fixing portion 6 in a wound state. In the illustrated example, the extra length portion 51 is wound once, but may be wound a plurality of times as long as the bending stress is in a range that does not damage the internal fiber.

(Fiber cable maintenance method)
The maintenance method of the fiber cable laid by the fiber cable laying structure and the laying method described above will be described. 3 to 6 are explanatory views showing the procedure of the fiber cable maintenance method according to the present embodiment.

  First, the laying structure is formed by the laying method described above. That is, the extra length portion 51 of the fiber cable 5 is fixed in a wound state to a pair of support wires 31, 31 that are tightly coupled to the utility pole 1, and the fiber cable 5 is fixed to the pair of support wires 31, 31. 31 is supported.

  Then, as shown in FIG. 3, for example, a ladder 9 or the like temporarily rises to the top of the utility pole 1 and releases the fixing portion 6. As a result, as shown in FIG. 4, the extra length portion 51 is suspended to the vicinity of the ground, and the subsequent maintenance process can be performed at the lower end of the suspended extra portion 51, that is, on the ground.

  As this maintenance process, for example, as shown in FIG. 5, an expansion work of the closure 11 in the case where the drop line 13 is branched from the fiber cable 5 to the new subscriber house 12 can be mentioned. In this case, the closure 11 is connected to the suspended extra length portion 51, the drop line 13 is led out from the closure 11 and supported by the support line 31, and laid to the vicinity of the new subscriber's house 12, and the branched hardware 13a. Then, it is fused to the new subscriber's home 12. In addition, when the installation location in the new subscriber's home 12 is, for example, a high place on the wall surface, a construction structure is constructed by the installation method of the present invention, a surplus length is secured, and fusion work etc. is performed on the ground. Be able to.

  Then, after the maintenance work of the fiber cable 5 is completed, the laying structure of the present invention is constructed again as shown in FIG. At this time, the closure 11 is lifted up to the support line 31 and fixed and supported on the support line 31.

(Effects of this embodiment)
According to the fiber cable laying structure, the laying method, and the maintenance method according to the present embodiment described above, when the fiber cable 5 is tightly attached to the utility pole 1, the extra length portion is attached to the fiber cable 5 at this fastening location. By securing 51 to the support wire 31 while the surplus length portion 51 is wound, the surplus length portion 51 can be suspended near the ground by releasing the fixation. As a result, maintenance work such as extension work such as branching a drop line can be performed on the ground, and safety and work efficiency of the maintenance work can be improved. Furthermore, in this embodiment, since the fiber cable laying structure of the present invention is also constructed in the new subscriber house 12, the safety and efficiency of maintenance work in the new subscriber house 12 can be improved. .

(Example of change)
In the above-described embodiment, the extra length portion 51 is fixed by a large number of fixing portions 6. However, the present invention is not limited to this, and for example, a storage case 61 as shown in FIG. 7 is used. Can do.

  The storage case 61 according to this modified example is capable of inserting the extra length portion 51, and includes a pair of reels 61 a and 61 a inside. The extra length portion 51 inserted inside is wound around the reels 61 a and 61 a. It is stored in a rotated state, and is fixed to the utility pole 1, the clamp portion 21, and the pair of support wires 31. The storage case 61 can protect the surplus length portion 51 by the storage case, and can facilitate the work for fixing and releasing the surplus length portion 51.

It is a schematic block diagram which shows the fiber cable laying structure which concerns on embodiment, (a) is the side view, (b) is the top view, (c) is the cross section of the sheath which integrated the fiber cable and the support wire FIG. It is explanatory drawing which shows the procedure of the laying method of the fiber cable which concerns on embodiment. It is explanatory drawing which shows the procedure of the maintenance method of the fiber cable which concerns on embodiment, and has shown the state by which the laying structure was already constructed | assembled. It is explanatory drawing which shows the procedure of the maintenance method of the fiber cable which concerns on embodiment, and has shown the state which suspended the extra length part. It is explanatory drawing which shows the procedure of the maintenance method of the fiber cable which concerns on embodiment, and has shown the state which connected the closure to the extra length part hung down. It is explanatory drawing which shows the procedure of the maintenance method of the fiber cable which concerns on embodiment, and has shown the state which constructed the laying structure again, after connecting a closure to the extra length part. It is a schematic block diagram which shows the fiber cable laying structure which concerns on the example of a change.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Electric pole 2 ... Tightening means 3 ... Support line 3a ... Cutting part 4 ... Dam part 5 ... Fiber cable 6 ... Fixed part 7 ... Sheath 9 ... Ladder 10 ... Fiber cable laying structure 11 ... Closure 12 ... New subscriber's house 13 ... Drop wire 13a ... Branch hardware 21 ... Clamp portion 22 ... Bolt nut 23 ... Pulley 24 ... Tightening wire 31 ... Support wire 31a ... Support wire end 32 ... Intermediate portion 41 ... Slit 42 ... Dam portion 51 ... Extra length portion 61 ... Storing Case 61a ... reel

Claims (10)

A structure for laying fiber cables,
A pair of fastening means fixed to the structure;
A pair of support wires that are tightened and stretched to each of the pair of tightening means;
A dam portion connecting the fiber cable to the pair of support wires;
A fiber cable laying structure comprising: a fixing portion that is fixed to the structure in a state in which an extra length of the fiber cable between the binding means is wound. The fiber cable is connected to one support line by the dam part,
The pair of support lines is formed by cutting off a middle part of the one support line,
2. The fiber cable laying structure according to claim 1, wherein the extra length portion is a portion connected to the deleted midway portion of the fiber cable.   2. The fiber cable laying structure according to claim 1, wherein the dam portions are arranged at predetermined intervals with a slit interposed therebetween.   The fiber cable laying structure according to claim 1, wherein the fixing portion is a case body that is housed in a state where the extra length portion is wound and is fixed to the pair of support wires. A method of laying fiber cables,
Tightening and stretching a pair of support wires to the structure, and supporting the fiber cable with the pair of support wires;
A fiber cable laying method comprising: a step of fixing the extra length of the fiber cable between the pair of tightly connected support wires to the structure in a wound state. The fiber cable is connected to one support line by a dam part,
The pair of support lines is formed by cutting off a middle part of the one support line,
6. The fiber cable laying method according to claim 5, wherein the extra length portion is a portion connected to the deleted midway portion of the fiber cable.   The fiber cable laying method according to claim 6, wherein the dam portions are disposed at predetermined intervals with a slit interposed therebetween. A maintenance method for laid fiber cables,
Fixing the excess length of the fiber cable around a pair of support wires that are tightly coupled to the structure and supporting the fiber cable on the pair of support wires; and
Releasing the fixing of the surplus length portion and hanging the surplus length portion;
A maintenance method for a fiber cable, wherein a maintenance process is performed at a lower end of the suspended portion that is suspended. The fiber cable is connected to one support line by a dam part,
The pair of support lines is formed by cutting off a middle part of the one support line,
The fiber cable maintenance method according to claim 8, wherein the extra length portion is a portion connected to the deleted midway portion of the fiber cable.   The fiber cable maintenance method according to claim 9, wherein a plurality of the dam portions are arranged at predetermined intervals with a slit interposed therebetween.

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