JP2012139109A - Cable protector for preventing bird damage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable protector for preventing bird damage which can reliably prevent a loose part of a light drop cable from being bitten off by a bird.SOLUTION: The cable protector 10 for preventing bird damage includes: a cylindrical body 11 dividable in two of right and left parts from an upper part when viewed in a longitudinal direction; and a projection 12 formed on an inner surface of the body 11, and biting into an outer cover of the light drop cable 1 when the cable protector 10 for preventing bird damage is mounted to the light drop cable 1. A protrusion 11a is formed on the inner surface of a part that contacts a neck part of the light drop cable 1 when the cable protector 10 for preventing bird damage is mounted to the light drop cable 1 of the body 11.

Description

  The present invention relates to a bird protection cable protector, and more particularly to a bird damage prevention cable protector suitable for application to a slack portion of an optical drop cable used in FTTH (Fiber To The Home) or the like.

Conventionally, as shown in FIG. 5A, the optical drop cable 1 used in FTTH or the like covers the core wire 1a and the two tension members 1b arranged with the core wire 1a sandwiched between them. It consists of a main body part, a support line part that covers the support line 1c with a jacket, and a neck part that connects the main body part and the support line part.
Such an optical drop cable 1 uses fiber reinforced plastics (FRP: Fiber Reinforced Plastics) for the tension member 1b, and is lightweight, thin, and excellent in flexibility. .

  The optical drop cable 1 has such excellent characteristics, but it is bundled using the branch line optical cable 2 and the spiral hanger 4 between the drop closure 3 and the drawing into the building. Has been laid.

At this time, in order to prevent tension from being applied to the optical fiber 1a or to drain water, the optical drop cable 1 drawn from the drop closure 3 is slackened as shown in FIG. 5B. .
At the branch point to the building, the optical drop cable 1 is branched by fixing the support line 1c of the optical drop cable 1 to a hardware attached to the messenger wire 2a of the branch system optical cable 2. The drop cable 1 is slackened to prevent tension from being applied to the optical fiber 1a or to drain water.
In addition, the support line 1c of the optical drop cable 1 is fixed to a hardware attached to the building wall or the like at the place where it is drawn into the building, but the optical drop cable 1 is slack even in the vicinity of the hardware, The optical fiber 1a is prevented from being tensioned or drained.

In addition, in the following Patent Document 1, the applicant of the present invention has a cable connection closure in order to easily protect a portion that is susceptible to bird damage and to reliably prevent disconnection of a core wire caused by bird damage. The structure of the cable lead-in part which provided the protection part which attaches the detachable clamp cover to the space | interval part with the spiral hanger, and provided the protection part which protects the surface of the cable part used as the branch point in the case of drawing in is proposed.
Patent Document 2 below discloses a cable protective cover that is wound around the outer periphery of a cable in order to protect the cable from bird and animal damage, and that includes a pungent component in the constituent material of the cable protective cover. ing.

JP 2010-008771 A Japanese Patent Laid-Open No. 2005-039904

However, in urban areas, it is recognized that birds will eat away the slack portion of the optical drop cable 1 and lose the optical drop cable 1 when the bird's nest is set up, and there may be cases where services stop due to line failures. is doing.
It is required to take an effective protective measure against such line damage caused by bird damage, and it is conceivable to wind a spiral sleeve around the slack portion of the optical drop cable 1, but the optical drop cable 1 itself. Has a problem that there is no suitable material to use as a spiral sleeve.

  In addition, the structure of the cable lead-in portion proposed by the present applicant in the above-mentioned Patent Document 1 is formed in a separated portion from the rear end portion of the cable connection closure to the front end portion to which the spiral hanger is attached. The draining portion is configured to be sandwiched with a support line for supporting a cable connection closure or the like with a clamp cover (see paragraph 0025 of the publication).

  In addition, with the protective cover as disclosed in the above-mentioned Patent Document 2, it is possible to prevent the bird from eating the optical drop cable, but if the bird hits the protective cover, the protective cover will be displaced. Is not considered at all, and when the bird strikes the protective cover, the protective cover is displaced and the optical drop cable is exposed, so that there is a problem that the exposed portion of the optical drop cable is eaten by the bird.

  An object of the present invention is to provide a bird protection cable protector that can reliably prevent a slack portion of an optical drop cable from being cut by a bird.

A first bird damage prevention cable protector according to the present invention is a bird damage prevention cable protector (10; 20) for preventing a slack portion of an optical drop cable (1) from being cut by a bird. A cylindrical main body (11; 21) that can be divided into left and right parts from the top when viewed along the longitudinal direction, and formed on the inner surface of the main body, and the optical drop cable for preventing bird damage When the cable protector is attached, the tip has a protrusion (12; 22) that bites into the outer cover of the optical drop cable, and the bird damage prevention cable protector is attached to the optical drop cable of the main body Further, a convex portion (11a; 12a) is formed on the inner surface of the portion that contacts the neck portion of the optical drop cable.
Here, a cut may be formed in the upper part of the main body (11).
When the upper portion of the main body is closed, both upper end portions of the main body overlap each other so that the bird protection cable protector (20) can be wound around and attached to the optical drop cable.
Water drain holes may be provided at predetermined intervals on the bottom of the main body.
The second bird protection cable protector of the present invention is a bird damage prevention cable protector (30) for preventing the slack portions of the plurality of optical drop cables (1) from being shredded by birds. The first protection for protecting one optical drop cable of the plurality of optical drop cables, comprising the first bird protection cable protector (10; 20) of the present invention. A tool (31), a cylindrical shape whose upper central part is fixed to the central part of the bottom part of the first protective equipment, and which can be divided into two from the bottom part when viewed along the longitudinal direction; and And a second protector (32) for collectively protecting the remaining optical drop cables of the plurality of optical drop cables.
Here, a drain hole is formed in a bottom portion of the main body of the first protective device, a position overlapping with a drain hole of the first protective device on an upper portion of the second protective device, and a bottom portion of the second protective device. May be provided at predetermined intervals.
The third bird damage prevention cable protector of the present invention is a bird damage prevention cable protector (40) for preventing the slack portions of the plurality of optical drop cables (1) from being shredded by birds. A plurality of protectors (41 to 45) disposed at equal intervals along the circumferential direction of the bird protection cable protector and protecting the plurality of optical drop cables, respectively. And a tension member (46) inserted through a through hole formed by being surrounded by the bottoms of the plurality of protectors, wherein the plurality of protectors are for the first bird damage prevention according to the present invention. It consists of a cable protector (10; 20).
Here, drain holes may be provided at predetermined intervals in portions facing downward after the main bodies of the plurality of protective devices are attached to the plurality of optical drop cables.

The bird protection cable protector of the present invention has the following effects.
(1) Protrusions and protrusions prevent birds from damaging the bird protection cable protector and shifting the bird protection cable protector, ensuring that the slack portion of the optical drop cable is cut off by the bird. Can be prevented.
(2) Besides preventing bird damage, the optical drop cable can be mechanically protected.
(3) Since the structure is simple, manufacturing by an extruded structure is possible, and reduction in manufacturing cost can be expected.
(4) The third bird protection cable protector of the present invention can function both as a protection for indoor wiring and as an aggregation spacer.
(5) When the third bird protection cable protector of the present invention is used as an aggregating spacer such as a LAN cable, it can be divided for each line system, and can be physically and efficiently aggregated, and visually. Since it is easy to judge, the function as a tag can also be expected. For this reason, in the cable investigation at the time of failure, the effect of being able to identify the said cable quickly can be expected. Also, even if there is a cable defect, it is very easy to attach and detach, and workability is good.
(6) In the third bird protection cable protector according to the present invention, a cable without a tension member can be easily supported. Therefore, the use of a drop prevention ring makes it possible to hold the cable stably mechanically. It becomes possible.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the structure of the cable protector 10 for bird damage prevention by 1st Example of this invention, (a) is a cross-sectional view which shows the state which closed the upper part of the main body 11, (b) is a figure of the main body 11. A cross-sectional view showing a state in which the upper part is opened, (c) is a cross-sectional view showing a state in which the optical drop cable 1 is accommodated in the main body 11, and (d) shows a state in which the optical drop cable 1 is covered with the main body 11. FIG. 4E is a cross-sectional view showing a state in which the slack portion of the optical drop cable 1 drawn out from the drop closure 3 is covered with a bird protection cable protector 10. It is a figure which shows the structure of the cable protector 20 for bird damage prevention by the 2nd Example of this invention, (a) is a cross-sectional view which shows the state which closed the upper part of the main body 21, (b) is a figure of the main body 21 FIG. 4C is a cross-sectional view showing a state in which the upper portion is opened, and FIG. 5C is a cross-sectional view showing a state in which the optical drop cable 1 is housed in the main body 21. It is a figure which shows the structure of the cable protector 30 for bird damage prevention by 3rd Example of this invention, (a) is a cross-sectional view which shows the state before mounting | wearing with the eight optical drop cables 1, (b) ) Is a cross-sectional view showing a state where the optical drop cables 1 are mounted. It is a figure which shows the structure of the cable protector 40 for bird damage prevention by 4th Example of this invention, (a) is a cross-sectional view which shows the state before mounting | wearing with the five optical drop cables 1, (b) ) Is a cross-sectional view showing a state in which the optical drop cables 1 are mounted. It is a figure for demonstrating the optical drop cable 1, (a) is a cross-sectional view which shows the structure of the optical drop cable 1, (b) is a figure which shows the slack part of the optical drop cable 1 pulled out from the drop closure 3 It is.

  For the purpose described above, a protrusion is formed on the inner surface of the cylindrical main body that can be divided into left and right from the top when viewed along the longitudinal direction, and the inner surface of the main body that contacts the neck of the optical drop cable is projected. Realized by forming the part.

Embodiments of a bird protection cable protector according to the present invention will be described below with reference to the drawings.
The bird protection cable protector 10 according to the first embodiment of the present invention (hereinafter referred to as “cable protector 10”) is of a left and right split type (from the top when viewed along the longitudinal direction). As shown in FIG. 1 (a) in a cross-sectional view (a cross-sectional view taken along the longitudinal direction when cut in a direction perpendicular to the longitudinal direction), A cylindrical main body 11 having a cut line and a protrusion 12 formed on the inner surface of the main body 11.

Here, the main body 11 is composed of a member having flexibility and elasticity, such as rubber or plastic, and the upper portion is closed as shown in FIG. 1A unless the main body 11 is divided into left and right. As shown in FIG. 1 (d), when the cable protector 10 is attached to the optical drop cable 1, the tip of the conical protrusion 12 bites into the outer cover of the optical drop cable 1, and the optical drop cable 1 is connected by the protrusion 12. The shape and dimensions can be held.
Further, a convex portion 11 a is formed on the inner surface of the portion that comes into contact with the neck portion of the optical drop cable 1 when the cable protector 10 is attached to the optical drop cable 1 of the main body 11.
As a result, the optical drop cable 1 can be securely held by the cable protector 10, and therefore, the cable protector 10 is attached to the slack portion of the optical drop cable 1 as shown in FIG. The cable protector 10 can be prevented from shifting even if it is left.

The protrusion 12 is formed only on a portion of the main body 11 that comes into contact with the support line portion of the optical drop cable 1 (see FIG. 5A). You may prevent it from being damaged.
Further, since there is no problem even if the tip of the protrusion 12 hits the support line 1c of the optical drop cable 1 slightly, the height (bottom surface) of the protrusion 12 formed on the portion of the main body 11 that contacts the support line part of the optical drop cable 1 The length of the optical drop cable 1 may be increased by increasing the length of the optical drop cable 1.

  In winter, rainwater between the main body 11 and the optical drop cable 1 may freeze, and the bending force may be applied to the core wire 1a due to expansion due to freezing. May be provided.

Next, a method of using the cable protector 10 will be described by taking as an example a case where the cable protector 10 is attached to the slack portion of the optical drop cable 1 drawn from the drop closure 3 shown in FIG.
The worker divides the main body 11 of the cable protector 10 into left and right as shown in FIG. 1B and opens the upper part of the main body 11 and then drops the optical drop cable from the upper part of the main body 11 as shown in FIG. After the optical drop cable 1 is housed in the main body 11 with the main body portion 1 first, the operation of closing the upper portion of the main body 11 as shown in FIG. 1 (d) is performed from the drop closure 3 of the optical drop cable 1. The cable protector 10 is attached to the slack portion of the optical drop cable 1 drawn out from the drop closure 3 by repeating from the portion to the front portion of the spiral hanger 4.

  Note that the cable protector 10 is also attached to the slack portion of the optical drop cable 1 at the branch point to the building or at the drawing-in point into the building by the same operation.

Next, a bird protection cable protector according to a second embodiment of the present invention will be described with reference to FIGS.
The bird protection cable protector 20 (hereinafter referred to as “cable protector 20”) according to the present embodiment is in a state where the upper portion of the main body 21 is closed as shown in FIGS. The upper and lower ends of the main body 21 are overlapped (that is, the outer surface on one end side and the inner surface on the other end side of the upper portion of the main body 21 are closely attached), so that the cable protector 20 is wound around the optical drop cable 1 and attached. This is different from the cable protector 10 according to the first embodiment described above in that it can be performed.

  Therefore, when the optical drop cable 1 is accommodated in the main body 21, the protrusion 22 is formed on the inner surface of the upper end portion (the right side portion in FIG. 2A) of the upper portion of the main body 21 that comes into contact with the support line portion of the optical drop cable 1. Although formed, the protrusion 22 is not formed on the inner surface of the other end portion (the left side portion in FIG. 2A) of the upper portion of the main body 21.

Next, a method of using the cable protector 20 will be described by taking as an example a case where the cable protector 20 is attached to the slack portion of the optical drop cable 1 drawn from the drop closure 3 shown in FIG.
The worker divides the main body 21 of the cable protector 20 into right and left as shown in FIG. 2B and opens the upper part of the main body 21, and the optical drop cable from the upper part of the main body 21 as shown in FIG. The optical drop cable 1 is housed in the main body 21 with the main body portion 1 first, and then the other end side of the upper portion of the main body 21 after the upper end portion of the main body 21 is covered with the support line portion of the optical drop cable 1. As shown in FIG. 2 (d), the operation of closing the upper portion of the main body 21 is applied to the end portion of the spiral hanger 4 from the drop-out portion 3 of the optical drop cable 1. By repeating up to the front portion, the cable protector 20 is attached to the slack portion of the optical drop cable 1 drawn out from the drop closure 3.

  Note that the cable protector 20 is also attached to the slack portion of the optical drop cable 1 at the branching point to the building or at the drawing-in point into the building by the same operation.

Next, a bird protection cable protector according to a third embodiment of the present invention will be described with reference to FIGS. 3 (a) and 3 (b).
The bird protection cable protector 30 (hereinafter referred to as “cable protector 30”) according to the present embodiment is used when a plurality of optical drop cables 1 are pulled out from the drop closure 3. As shown in FIG. 3A, a first protective device 31 for protecting one optical drop cable 1 of the plurality of optical drop cables 1 and an upper central portion are first. And a second protector 32 that collectively fixes the remaining optical drop cables 1 of the plurality of optical drop cables 1.

  Here, the 1st protector 31 is a thing of the structure similar to the cable protector 10 by the 1st Example mentioned above.

The second protector 32 is a left-and-right bifurcated cylinder like the first protector 31, but can be divided into left and right parts from the bottom when viewed along the longitudinal direction. .
That is, the second protector 32 is configured to store a plurality of optical drop cables 1 from the bottom side, and the bottom end portions overlap with each other when the bottom portion is closed (that is, the outer surface on one end side of the bottom portion). And the inner surface of the other end are in close contact with each other.

Next, a method of using the cable protector 30 will be described by taking as an example the case where the cable protector 30 is attached to the slack portions of the eight optical drop cables 1 drawn out from the drop closure 3 shown in FIG. To do.
The worker divides the main body of the first protector 31 into left and right as shown in FIGS. 1B to 1D in the description of the method of using the cable protector 10 according to the first embodiment. The optical drop cable 1 of the eight optical drop cables 1 drawn out from the drop closure 3 is inserted into the main body 11 from the upper part of the main body to the main body of the optical drop cable 1 first. After storing, the operation of closing the upper part of the main body is repeated from the portion of the optical drop cable 1 pulled out from the drop closure 3 to the front portion of the end of the spiral hanger 4. Wear one protective gear 31.

  Subsequently, the worker divides the second protector 32 into left and right parts, opens the bottom of the second protector 32, and the remaining 7 of the eight optical drop cables 1 drawn out from the drop closure 3. After the optical drop cables 1 are stored in the second protective device 32 from the bottom of the second protective device 32, the operation of closing the bottom of the second protective device 32 is performed by the seven optical drop cables 1. The second protector 32 is attached to the slack portions of the seven optical drop cables 1 by repeating from the drawn-out portion of the drop closure 3 to the front portion of the end of the spiral hanger 4.

As a result, as shown in FIG. 3B, the first protective device protects that one of the eight optical drop cables 1 drawn out from the drop closure 3 is torn away by a bird. The second protective device 32 can protect the remaining seven optical drop cables 1 from being eaten away by birds.
In addition, since the single optical drop cable 1 can be firmly held by the first protector 31, the cable protector 30 can be prevented from shifting even if it is struck by a bird.

  In addition, while providing a drain hole at the bottom of the main body of the first protector 31 at an interval of 10 cm, for example, a position overlapping the drain hole of the first protector 31 above the second protector 32 and the second For example, water drainage holes may be provided at intervals of 10 cm at the bottom of the protector 32 to prevent bending force from being applied to the cores 1a of the eight optical drop cables 1 due to expansion due to freezing of rainwater in winter. .

  The first protector 31 has the same configuration as that of the cable protector 10 according to the first embodiment, but may have the same configuration as that of the cable protector 20 according to the second embodiment described above. Good.

Next, a bird protection cable protector according to a fourth embodiment of the present invention will be described with reference to FIGS. 4 (a) and 4 (b).
The bird protection cable protector 40 (hereinafter referred to as “cable protector 40”) according to the present embodiment is used when five optical drop cables 1 are pulled out from the drop closure 3. As shown in FIG. 4 (a), the first to thirty-second distances are arranged along the circumferential direction of the cable protector 40 (that is, when viewed along the longitudinal direction of the cable protector 40). First to fifth protective devices 41 to 45 (radially arranged so that the upper portions of the fifth protective devices 41 to 45 are positioned at intervals of 72 degrees from the center point), and the first to fifth protective members And a tension member (tensile body) 46 inserted through a through hole formed by being surrounded by the bottoms of the tools 41 to 45.

Here, the 1st thru | or 5th protector 41-45 is a thing of the structure similar to the cable protector 10 by the 1st Example mentioned above.

The tension member 46 is for improving the mechanical strength of the five optical drop cables 1.

Next, the method of using the cable protector 40 will be described by taking as an example the case where the cable protector 40 is attached to the slack portions of the five optical drop cables 1 drawn out from the drop closure 3 shown in FIG. To do.
The worker divides the main body of the first protective device 41 into left and right as shown in FIGS. 1B to 1D in the description of the method of using the cable protective device 10 according to the first embodiment. The upper part of the optical drop cable 1 is opened, and one optical drop cable 1 out of the five optical drop cables 1 drawn out from the drop closure 3 is stored in the main body from the upper part of the main body with the main body of the optical drop cable 1 first. After that, the operation of closing the upper portion of the main body is repeated from the portion of the optical drop cable 1 pulled out from the drop closure 3 to the front portion of the end of the spiral hanger 4 so that the slack portion of the optical drop cable 1 is the first. Wear the protective equipment 41.

  Subsequently, the worker repeats the same operation for the remaining four optical drop cables 1 to put the second to fifth protectors 42 to 45 on the slack portions of the four optical drop cables 1. Wear each one.

  As a result, as shown in FIG. 4B, the first to fifth protectors 41 to 45 protect the five optical drop cables 1 drawn from the drop closure 3 from being eaten by birds. Can do.

  It should be noted that water holes are provided at intervals of 10 cm, for example, at portions facing downward after the first to fifth protectors 41 to 45 are attached to the five optical drop cables 1, and expansion due to freezing of rainwater in winter Accordingly, bending force may be prevented from being applied to the cores 1a of the five optical drop cables 1.

  In addition, since the first optical drop cable 1 can be firmly held by the first protector 41, the cable protector 40 can be prevented from shifting even if it is struck by a bird. The fifth protectors 42 to 45 do not have to be formed with protrusions (see the protrusion 12 shown in FIG. 1A).

  Further, the first to fifth protectors 41 to 45 have the same configuration as that of the cable protector 10 according to the first embodiment, but are the same as those of the cable protector 20 according to the second embodiment described above. It may be configured.

DESCRIPTION OF SYMBOLS 1 Optical drop cable 1a Core wire 1b Tension member 1c Support line 2 Branch system optical cable 2a Messenger wire 3 Drop closure 4 Spiral hanger 10,20,30,40 Cable protector 11,21 Main body 11a, 21a Protrusion part 12,22 Protrusion 31 1st protector 32 2nd protector 41-45 1st thru | or 5th protector 46 Tension member

Claims (8)

A bird protection cable protector (10; 20) for preventing the slack portion of the optical drop cable (1) from being cut by a bird,
A cylindrical main body (11; 21) that can be divided into two from the top when viewed along the longitudinal direction;
A projection (12; 22) formed on an inner surface of the main body and having a tip that bites into the outer cover of the optical drop cable when the bird protection cable protector is attached to the optical drop cable; ,
A convex portion (11a; 12a) is formed on the inner surface of the portion that comes into contact with the neck portion of the optical drop cable when the bird protection cable protector is attached to the optical drop cable of the main body.
A cable protector for preventing bird damage.   The bird protection cable protector according to claim 1, wherein a cut is formed in an upper part of the main body (11).   When the upper part of the main body is closed, both ends of the upper part of the main body overlap so that the bird protection cable protector (20) can be wound around the optical drop cable. The bird protection cable protector according to claim 1.   The bird protection cable protector according to any one of claims 1 to 3, wherein drain holes are provided at predetermined intervals in a bottom portion of the main body. A bird protection cable protector (30) for preventing a slack portion of a plurality of optical drop cables (1) from being cut by a bird,
A first for protecting one optical drop cable of the plurality of optical drop cables, comprising the bird protection cable protector (10; 20) according to any one of claims 1 to 4. Protective equipment (31),
The plurality of light drops having a cylindrical shape whose upper central part is fixed to the central part of the bottom part of the first protective device and which can be divided into two parts from the bottom part when viewed along the longitudinal direction. A second protective device (32) for collectively protecting the remaining optical drop cables of the cables;
A cable protector for preventing bird damage, comprising:   A drain hole is provided at the bottom of the main body of the first protector, at a position overlapping the drain hole of the first protector at the top of the second protector, and at the bottom of the second protector. 6. The bird protection cable protector according to claim 5, wherein the cable protector is provided at intervals. A bird protection cable protector (40) for preventing a slack portion of a plurality of optical drop cables (1) from being cut by a bird,
A plurality of protectors (41 to 45) arranged at equal intervals along the circumferential direction of the bird protection cable protector, and for protecting the plurality of optical drop cables, respectively,
A tension member (46) inserted through a through-hole surrounded by the bottoms of the plurality of protective devices;
The plurality of protective equipment comprises the bird protection cable protective equipment (10; 20) according to any one of claims 1 to 4.
Cable protector for bird damage prevention, characterized by   8. Bird damage according to claim 7, wherein drain holes are provided at predetermined intervals in portions facing downward after mounting the main body of the plurality of protective devices to the plurality of optical drop cables. Cable protector for prevention.

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