JP5247266B2 - Optical drop cable extra length processing tool - Google Patents

Description

  The present invention relates to an optical drop cable surplus length processing tool, and more particularly to an optical drop cable surplus length processing tool suitable for drawing an optical drop cable from between utility poles to a subscriber's house with a surplus length.

Conventionally, the following methods are known as a method of drawing an optical drop cable (drawing cable) from a main line optical fiber cable to a subscriber's house.
For example, in Patent Document 1 below, an optical drop cable connected to an optical fiber of an aerial optical wiring network in order to quickly and efficiently pull the optical drop cable from the overhead optical wiring network to a target house or the like. The optical drop cable is retained in the extra length retaining section provided at the upper part of the utility pole so that it can be taken out, and the optical drop cable is pulled in by the extra length retained in the extra length retaining section when it is pulled down. There is disclosed a method of dropping an optical drop cable that is laid so as to be attached to an electric wire and drawn to a drawing point on the house side.

  Further, Patent Document 2 below has an extra length in order to realize a free optical fiber laying mode when branching a drop line from a trunk optical fiber cable and to reduce construction costs and maintenance costs at the time of laying. The support line that supports the optical fiber cable of the trunk line cable in a meandering state, and the support line that supports the optical fiber cable of a drop line in a meandering state with an extra length are connected to the two support lines. An laying structure and a laying method of an optical fiber cable provided with a connecting jig are disclosed.

Further, Patent Document 3 below discloses an optical drop cable extra length processing tool and a method for retracting an optical drop cable, which are provided with a damper means for preventing the optical drop cable from being cut even when an abnormal tension is applied. Yes.
Japanese Patent Laid-Open No. 2002-148496 JP 2005-266261 A JP 2007-330019 A

However, the optical drop cable holding structure and the optical drop cable drawing method disclosed in Patent Document 1 may be effective when drawing the optical drop cable from the utility pole to the subscriber's house. When the optical drop cable is drawn into the subscriber's house located between the utility poles, the optical drop cable is drawn from between the utility poles rather than from the utility pole, so it is not necessarily effective.
Further, the optical fiber cable laying structure and the laying method disclosed in Patent Document 2 have a problem that the extra length of the optical drop cable cannot be taken very freely.
Furthermore, in the optical drop cable extra length processing tool and the optical fiber cable drawing method disclosed in Patent Document 3, the extra length processing tool used has a complicated structure and is expensive, and this is provided in each optical drop cable. In order to do so, there was a problem of requiring a lot of expenses.

  In addition, optical drop cables are connected to multi-core optical cables (trunk lines, branch lines) within the closure and pulled into the subscriber's house. However, it was necessary to move the position of the closure to which the optical drop cable was connected when the utility pole was replaced. In some cases, in the conventional method, it is necessary to process the surplus length between the utility poles. In particular, when the optical drop cable is laid in multiple lines, the work is often performed at a plurality of locations. In addition, the optical drop cable has become entangled, and even if there is no need to unleash the extra length, it has to be reprocessed and the workability is poor.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide an inexpensive optical drop cable extra length processing tool that has a simple structure and can be easily attached. Accordingly, an extra length processing tool can be provided for each optical drop cable at a position close to the closure without much cost, and as a result, workability can be improved.

  In order to solve the above problem, the present invention provides an optical drop cable extra length processing tool (10) for performing extra length processing of an optical drop cable when the optical drop cable (12) is drawn from between utility poles to a subscriber's house. And an annular frame (22) for winding an optical drop cable, and a latch (32) for fixing the annular frame to a message wire (14) stretched between utility poles, The annular frame has a substantially oval shaped ring that is curved so that its major axis is arcuate, and the latching tool connects the vertices of the curved annular frame, and An optical drop characterized in that the annular frame is hung on the message wire so as to surround the spiral hanger (16) wound around the message wire by gripping the message wire at an intermediate portion thereof. Providing Buru extra length handling equipment.

  Moreover, it is preferable that the annular frame (22) is formed with a groove (24) for introducing the optical drop cable (12).

  Here, the groove portion (24) of the annular frame (22) is provided with a caulking portion (26) for preventing the introduced optical drop cable (12) from being detached from the groove portion. More preferred.

  In addition, the said annular frame (22) shall have flexibility, and when a big tension | tensile_strength acts on an optical drop cable (12), this shall be buffered by deform | transforming temporarily.

  According to the optical drop cable surplus length processing tool of the present invention, the curved annular frame is configured to be hung on the message wire so as to surround the spiral hanger wound around the message wire. It is possible to provide an inexpensive extra length processing tool with a simple structure capable of processing the length freely. Therefore, if an extra length processing tool is provided for each optical drop cable in a position close to the closure, the optical drop cable will be entangled or it will be necessary to unprocess and reprocess it even if it is not necessary to solve the extra length. As a result, workability can be improved.

  Moreover, if the groove part for introducing an optical drop cable into an annular frame is formed, the work efficiency at the time of winding an optical drop cable around an annular frame can be improved.

  In addition, if a groove portion is provided in the groove portion of the annular frame body, it is possible to easily prevent the optical drop cable introduced into the groove portion and wound around the annular frame body from being disconnected, and the work efficiency can be further improved. it can.

  By making the annular frame flexible, even when a large tension is applied to the optical drop cable, the annular frame can be temporarily deformed to buffer the tension. The cable can be prevented from being cut.

The present invention is an optical drop cable extra length processing tool suitable for drawing an optical drop cable from between utility poles to a subscriber's house, and in particular, from a (multi-core) optical cable (trunk line, branch line) to a closure. For example, by processing the extra length of each optical drop cable that is connected and taken out in the optical drop cable at a position close to the closure, the position of the closure to which the optical drop cable is connected in accordance with the replacement of the utility pole, etc. Even when it is necessary to move, the optical drop cable is entangled, or it is not necessary to solve the extra length and it is not necessary to solve it and reprocess it, so that the work efficiency can be improved and it is inexpensive An optical drop cable extra length processing tool is provided.
The optical cable is supported by a spiral hanger wound about 10 cm in diameter on a message wire stretched between utility poles, and a closure (not shown in the figure) is also attached to and supported by this message wire. Yes.
Preferred embodiments of the present invention will be described below with reference to the drawings.

1 to 4 are views showing an example of an extra length cable drop length processing tool according to the present invention. FIG. 1 is a perspective view showing a state of use, FIG. 2 is a side view thereof, and FIG. It is XX sectional drawing.
This optical drop cable extra length processing tool 10 is for processing the extra length of the optical drop cable 12 taken out from the multi-core optical cable 18, and an annular frame 22 for winding the optical drop cable, It comprises a latch 32 for fixing the annular frame to the message wire 14 stretched between the utility poles.

As shown in FIG. 4, the annular frame 22 has an ellipsoidal ring in which the length × width is about 45 cm × 15 cm and its short side is semicircular, and its long axis (or long side straight portion). Is curved in a U-shape, and a space of about 15 cm (a space for arranging spiral hangers) is formed between the curved and opposed annular frames. Here, the radius of curvature of the curved portion is as large as possible.
The annular frame 22 is formed of a synthetic resin, and a rail-shaped groove 24 having a depth of about 1 cm for introducing the optical drop cable 12 is formed over the entire circumference. The annular frame 22 has certain flexibility and flexibility, and can be temporarily deformed by an external force.
The cross-sectional shape of the annular frame 22 may be circular or rectangular, but in this embodiment, it is assumed that each side has a rectangular outer shape of about 1.5 cm.

The latch 32 is wound around the message wire by connecting the apexes (vertical apex of the short side semicircle) of the curved annular frame 22 and holding the message wire 14 at an intermediate portion thereof. The annular frame is hung on the message wire in a state of surrounding the spiral hanger 16 (see FIG. 4).
Therefore, the latching tool 32 is divided into two parts having a total length of about 8 cm, and one end of each part is fastened in a state of standing vertically to the apex portion of the annular frame 22, and the other end is a message wire. 14 is a semicircular collar portion 33 having the same diameter as that of 14. The most distal portion of the flange 33 is warped to form a locking portion 35, and a locking hole 37 for locking the locking portion of the other part is formed near the base of the flange. Yes. That is, the divided parts grip the message wire 14 having a diameter of about 1 cm by engaging the locking portions 35 and the locking holes 37 with each other so that the openings of the flange portions 33 face each other. It will be connected linearly in the state.

The optical drop cable extra length processing tool 10 configured as described above is used by being attached to the message wire 14 as follows.
First, the curved annular frame 22 is arranged below the message wire 14 and the spiral hanger 16, and the annular frame is passed so that the message wire and the spiral hanger wound around the message wire pass between the divided latches 32. Lift your body. As a result, the annular frame 22 surrounds the message wire 14 and the spiral hanger 16.
Then, the message wire 14 is positioned by positioning the message wire 14 on the collar portion 33 of the divided latch 32, and the locking portion 35 and the locking hole 37 are engaged with each other and combined to hold the message wire. As a result, the optical drop cable extra length processing tool 10 is hooked on the message wire 14 like a jagged bay.
Then, a single drop cable taken out from the closure is wound while being introduced into the groove 24 of the annular frame 22, and the extra length of the optical drop cable 12 is processed. Finally, a vinyl tape is wound around the annular frame 22 at an appropriate interval to prevent the optical drop cable 12 from being detached from the groove 24 (after this extra length processing operation is performed first, an extra portion of the message wire is left. You can hook a long processing tool).
The optical drop cable 12 is removed from the optical drop cable surplus length processing tool 10 to the subscriber's home from the vicinity of the lower end of the optical drop cable surplus length processing tool attached to the message wire 14, and the left and right optical drop cables are It is assumed that they intersect (see FIGS. 1 and 2). This is because, even when a large tensile force acts on the optical drop cable 12 from the subscriber's home side, the optical drop cable extra length processing tool 10 tilts with the portion where the latching tool 32 grips the message wire 14 as a fulcrum. This is because the tensile force can be buffered, and due to the flexibility and flexibility of the annular frame 22, it is temporarily deformed when a large tensile force acts on the optical drop cable 12. This is to efficiently buffer this. In addition, although the optical drop cable extra length processing tool 10 may contact with a spiral wire by inclining or deforming, there is no particular problem.

  According to the present embodiment described above, it is possible to provide an optical drop cable extra length processing tool which can be manufactured at a low cost with a simple structure and can be easily attached to a message wire. As a result, an extra length processing tool can be provided for each optical drop cable at a position close to the closure without much cost, and the workability is improved as a result by preventing the optical drop cable from getting tangled. Can be made.

  Although the entire drawing is omitted, the outer shape of the annular frame 22 of the optical drop cable extra length processing tool 10 of the second embodiment is curved in a cylindrical shape. Further, the groove portion 24 of the annular frame body is provided with a lapping portion for preventing the introduced optical drop cable 12 from coming off at regular intervals. In the present embodiment, the same components as those in the first embodiment are described with the same reference numerals.

The annular frame 22 has an elliptical ring having flexibility and flexibility in which the length × width is about 45 cm × 15 cm and the short side is semicircular, and its long axis (or long side straight line portion). ) Is curved so as to be cylindrical, and the shape is maintained in that state. That is, the annular frame 22 is curved and the annular frame body is maintained in a curved state by combining and connecting the divided latching devices 32 fixed to the tip thereof in a straight line. A cylindrical space having a diameter of about 15 cm is formed.
Further, as shown in FIG. 5 which is a cross-sectional view of the annular frame 22, the groove portion 24 of the annular frame body has a rod-shaped caulking portion 26 protruding from the opening portion, and the tip thereof is inclined toward the groove bottom surface side. Is provided. Since the caulking portion 26 is flexible and elastic, and is provided with an inclination, the optical drop cable 12 can be easily introduced into the groove portion 24, while the optical drop cable once introduced into the groove portion is easy. You will never get out of here. The edge portions 26 are provided on the entire circumference of the groove portion 24 of the annular frame 22 at an interval of about 10 cm, for example. Therefore, it is not necessary to prevent the optical drop cable 12 from being detached from the groove 24 by winding the vinyl tape around the annular frame 22 as in the first embodiment.

In addition to the effects of the first embodiment, the following effects are also exhibited by the optical drop cable surplus length processing tool of the present embodiment.
That is, by winding the optical drop cable 12 around the planar annular frame 22 in a flat state, curving it into a cylindrical shape, and maintaining its shape by combining the latch 32 while gripping the message wire 14, It is possible to facilitate the work of winding the optical drop cable around the annular frame.
Further, in the optical drop cable surplus length processing tool of the present embodiment, the entire length of the latching tool 32 is shorter than that of the optical drop cable surplus length processing tool of the first embodiment in which the annular frame 22 is curved in a U shape. Therefore, the optical drop cable extra length processing tool can be hooked on the message wire 14 in a more stable state.
In addition, the effect of the cache part 26 provided in the groove part 24 is as above-mentioned.

  As described above, according to the present invention, it is possible to provide an inexpensive optical drop cable extra length processing tool that has a simple structure and can be easily attached. Accordingly, an extra length processing tool can be provided for each optical drop cable at a position close to the closure without much cost, and as a result, workability can be improved.

  It is needless to say that the optical drop cable extra length processing tool of the present invention can be appropriately changed without departing from the spirit of the invention. For example, it is also preferable that the latching device has flexibility and is buffered by deforming into an arcuate shape when a large tensile force acts on the optical drop cable.

It is the perspective view which showed the state of use of the optical drop cable extra length processing tool of Example 1. FIG. It is a side view of the optical drop cable extra length processing tool of Example 1. It is XX sectional drawing of FIG. It is a perspective view of the annular frame before making it curve and a latch. It is a cross-sectional view of an annular frame.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Optical drop cable extra length processing tool 12 Optical drop cable 14 Message wire 16 Spiral hanger 18 Multi-core optical cable 22 Annular frame 24 Groove part 26 Latch part 32 Latching tool 33 Gutter part 35 Locking part 37 Locking hole

Claims (4)

An optical drop cable extra length processing tool (10) for performing extra length processing of the optical drop cable when pulling the optical drop cable (12) from between utility poles to a subscriber's house,
An annular frame (22) for winding an optical drop cable, and a latch (32) for fixing the annular frame to a message wire (14) stretched between utility poles,
The annular frame has a substantially oval ring that is curved so that its major axis draws an arc;
The clasp connects the apexes of the curved annular frame, and grips the message wire at an intermediate portion thereof to surround the spiral hanger (16) wound around the message wire. An optical drop cable extra length processing tool characterized in that a frame is hung on a message wire.   The optical drop cable extra length processing tool according to claim 1, wherein a groove (24) for introducing the optical drop cable (12) is formed in the annular frame (22). The groove portion (24) of the annular frame (22) is provided with a caulking portion (26) for preventing the introduced optical drop cable (12) from being detached from the groove portion. The optical drop cable extra length processing tool according to claim 2 . The said annular frame (22) has flexibility, and when a big tension | tensile_strength acts on an optical drop cable (12), this is buffered by deform | transforming temporarily . The optical drop cable extra length processing tool of 2 or 3 .

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