JP5114220B2 - Optical drop cable retainer - Google Patents

Description

  The present invention relates to an optical drop cable retainer, and more particularly to an optical drop cable retainer suitable for drawing an optical drop cable from a support to a house or the like.

Conventionally, the optical drop cable is secured (supported) when the optical drop cable is drawn from the utility pole (support) to the house in the same manner as the support method for the subscriber fixed telephone lead-in wire widely established. The supporting wire separated from the optical drop cable is fixed to the hanging wire erected between the utility poles, and the steel cored outdoor retainer 120 shown in FIG. 7 (b) is attached to the separating hardware 110. 3 (see FIG. 8) is wound around the steel core-inserted outdoor retainer 120 (see, for example, Patent Document 1 below).
Further, on the house side, the C-shaped hardware 130 (hook member) shown in FIG. 7C is fixed to the wall surface of the house, the steel cored outdoor retainer 120 is attached to the C-shaped hardware 130, and the optical drop cable is attached. The support wire 3 separated from the wire is wound around the steel cored outdoor retainer 120.

In Patent Document 2 below, a spiral winding portion that is wound around a trunk support wire and has shape retaining properties and an annular portion that is formed integrally with the winding portion are formed. Wires such as electric wires and optical fiber cables are twisted with respect to the attachment part and arranged in a plane that intersects the laying direction of the trunk support line in a state where the winding part is wound around the trunk support line. When the cables are fastened together to branch the cable, it is possible to prevent the fixing force to the cable from being lowered even if a complicated tensile force is applied to the tightening point, and to reduce the weight of the fastening jig. Tightening jigs that reduce the burden on utility poles and the like are disclosed.
In addition, in Patent Document 3 below, in addition to a tensioning device main body in which a first winding portion formed in a T shape for winding an end portion of an outdoor wire suspension line composed of an optical cable and a suspension wire is arranged at the pull-in side end portion. In the outdoor cable optical cable anchoring device in which the guide portion is disposed at the end and the second winding portion for winding the support wire is formed in the central portion, the tensioning device main body is a 2-4 square pillar, and each plane thereof By adopting a configuration in which the first winding portion, the second winding portion, and the guide portion are provided so as to project on the upper side, the overall weight can be reduced, and a plurality of optical drop cables can be easily retained with a single retainer. A multi-strand optical cable retainer is disclosed.
JP 2007-89351 A JP 2007-110721 A Registered Utility Model No. 3120667

However, in the optical drop cable support method described above, when the support wire 3 separated from the optical drop cable is wound around the steel cored outdoor retainer 120, as shown in FIG. There is a problem that workability is poor because it is necessary to perform the work of winding the front and back (front and back winding work).
Further, the nut 110 (see FIG. 7A) is fastened to the suspension line by tightening the nut, so that it takes time to attach and remove the segment hardware 110 to / from the suspension line, or an optical drop cable. There was a problem that the wire 110 was disconnected at the time of disconnection and dropped together with the steel cored outdoor retainer 120.

  An object of the present invention is to provide an optical drop cable retainer capable of improving the efficiency of pulling in the optical drop cable and preventing a drop accident when the optical drop cable is disconnected.

The optical drop cable retainer of the present invention is an optical drop cable retainer used for drawing an optical drop cable, and is a suspension line formed between two linear wires and spanned between supports ( 5) and a retainer (20; 60) formed from a single wire and attached to the retainer, wherein the retainer is support wire separated from the optical drop cable (3; 3 ₁ to 3 ₄₎ winding portion for winding the; Bei give a _{(22 b1, 22 b2 62 b1} ~62 b3), said fastener, said anchor member And a fixing part (12) for fixing the fixture to the suspension line, the ring part being one of the two linear wires. One end side of the wire is circular and more than half a circle Bending and bending the first straight part into a circular shape to form the locking hole (11 _a ), and then providing the second straight part having the same length as the first straight part It is formed by bending the other end side of the linear wire into the same shape as the one end side, and the fixing portion spirals one end side of the other linear wire of the two linear wires. After winding the portion of the ring portion on the opposite side of the locking hole of the first and second linear portions to fix the ring portion, the other end of the other linear wire is spirally wound It is formed by winding on.
Here, both ends of the fixed portion may be claw-shaped.
A first engagement portion (21 ₁ , 61 ₁ ) for engaging the retainer with the retainer by engaging the retaining hole formed in the ring portion of the retainer; And a retaining portion (22, 62) for winding the supporting wire separated from the optical drop cable and retaining the optical drop cable.
The first engagement portion may be formed by spirally winding one end side of the one linear wire twice or more.
A ring-shaped second engagement portion (21 ₂ ) for engaging the retainer with the hook member (130) fixed to the retracting side of the optical drop cable and attaching the retainer to the hook member. May be further provided.
The retaining portion includes a linear shaft portion, a first winding portion (22 _b1 ) whose base portion is narrowed, a transition portion (22 _c ), and a second winding portion whose base portion is narrowed. (22 _b2 ), and the shaft portion includes a first shaft portion (22 _a1 ) between the first engagement portion and the first winding portion, and the first winding portion. And the second shaft portion (22 _a2 ) between the transition portion and the third winding portion (22 _a3 ) between the transition portion and the second winding portion, and the second winding A fourth shaft portion (22 _a4 ) between the attachment portion and the second engagement portion may be included.
The crossing portion is formed to be perpendicular to the first winding portion, and the second winding portion is formed to be opposite to the first winding portion. It may be.
The retaining portion may include a third winding portion (62 _b3 ) having a narrow base portion instead of the crossover portion.

The optical drop cable retainer of the present invention has the following effects.
(1) Since the support wire separated from the optical drop cable has only to be wound around the first and second winding portions of the retainer constituting the optical drop cable retainer, the front and back windings in the conventional steel cored outdoor retainer Compared to the attaching operation, the supporting wire can be easily wound.
(2) Since the fixture constituting the optical drop cable retainer is a rotationally fixed system, the fixture can be easily attached to and detached from the suspension line, and the optical drop when the optical drop cable is disconnected It is possible to prevent the accidental fall of the cable retainer.
(3) Since the support wire is directly wound around the first and second winding portions of the retainer, the finished state can be confirmed at a glance.
(4) Since the fixture can be formed with two linear wires and the retainer can be formed with one linear wire, the weight of the optical drop cable retainer is reduced and the manufacturing cost is reduced. Can be achieved.
(5) When supporting the optical drop cable in the same direction by providing three winding parts on the retainer, it is possible to support up to four optical drop cables depending on the combination of the winding parts used. it can.

  For the above purpose, a fixture formed of two linear wires is fixed to a suspension line laid between supports, and a support wire formed of one linear wire and separated from an optical drop cable is attached. This was realized by attaching a retainer having a winding part for winding to a fixture.

Embodiments of the optical drop cable retainer of the present invention will be described below with reference to the drawings.
The optical drop cable retainer according to the first embodiment of the present invention includes a fixture 10 shown in FIG. 1 (a) and a retainer 20 shown in FIG. 1 (b).

  The fixture 10 is for fixing the optical drop cable retainer to the suspension line 5 (see FIG. 3) installed between the utility poles. As shown in FIG. 1 (a), the ring portion 11 and the fixing portion 12 Is provided.

The ring portion 11 is bent at one end side of one linear wire in a circular shape with a radius of curvature of 3.5R by a half or more and bent into a circular shape with a first straight portion to form _a locking hole 11a. Later, the second straight portion having the same length as the first straight portion is provided and the other end side of the linear wire is bent into the same shape as the one end side (that is, circular with a radius of curvature of 3.5R). It is formed by bending half or more.
Further, the locking state the locking hole 11 length from _a side opposite to the tip of the locking hole 11 _a of the first and second straight portions of the ring portion 11, fitted with a fixture 10 to the suspension wire 5 the inner ends of the grooves 11 _a is a length away than 50mm from suspension wire 5. As a result, it is possible to prevent the ring portion 11 from remaining in the spiral inner diameter of the spiral hanger of the overhead wire material that is currently employed in the general bundling method. This wiring work can be performed smoothly even when the wiring to the spiral hanger.

The fixing portion 12 is formed by spirally winding one end of one linear wire different from the linear wire forming the ring portion 11 with a radius of curvature of 3.5R and a pitch of 25 mm. After fixing the ring portion 11 by winding the portion of the linear portion 2 opposite to the locking hole 11 _a only twice, the other end side of this linear wire is spiral with a radius of curvature of 3.5 R and a pitch of 25 mm. The wire is wound in the same direction as one end side of the wire.
The length of the fixing part 12 is 250 to 300 mm.

As described above, the portion of the ring portion 11 opposite to the locking hole 11a is formed by bending the other end of the linear wire into a circular shape with a radius of curvature of 3.5R more than half a circle. This part is hooked on the hanging line 5 and the fixture 10 is attached to the hanging line 5, and the ring part 11 is fixed to the part opposite to the locking hole 11 _a of the first and second straight parts only twice by the fixing part 12. Since it is wound and fixed, the tensile strength and the sliding strength with respect to the longitudinal direction (horizontal direction) of the suspension wire 5 can be increased as compared with the fastening jig disclosed in Patent Document 2 above, and the ring portion 11 The tensile strength and the sliding strength with respect to the direction (vertical direction) along the longitudinal direction of the first and second straight portions can be increased.

As shown in FIG. 1 (b), the retainer 20 is engaged with _a locking hole 11 _a formed in the ring portion 11 of the fixture 10 to attach the retainer 20 to the fixture 10. Engaging portion 21 ₁ , retaining portion 22 for wrapping support wire 3 separated from the optical drop cable and securing the optical drop cable, and C-shaped hardware 130 fixed to the wall surface of the house (FIG. 7C) And a second engaging portion 21 ₂ for attaching the retainer 20 to the C-shaped metal piece 130. In addition, the length of the retainer 20 is 175 mm.

The first engaging portion 21 ₁ is formed by bending one end of one linear wire and then winding it twice in a spiral shape with a radius of curvature of 9R. The first engaging portion 21 ₁ is wound more than once in a spiral one end of one linear wire in different radii of curvature (e.g., curvature after wound once spirally with a radius of curvature 5R It may be formed in a similar manner by winding it spirally with a radius of 9R.

The retaining portion 22 includes a linear shaft portion, an arc-shaped first winding portion 22 _b1 whose base portion is narrowed, a semicircular crossing portion 22 _c, and an arc-shaped shape whose base portion is narrowed. 2nd winding part _22b2 .

Shank, between the first shaft portion 22 _a1, first with the winding portion 22 _b1 and the connecting portions 22 _c between the first engaging portion 21 ₁ and the first winding portion 22 _b1 Second shaft portion 22 _a2 , third shaft portion 22 _a3 between crossover portion 22 _c and second winding portion 22 _b2 , second winding portion 22 _b2 and second engagement And a fourth shaft portion 22 _a4 between the portion 21 ₂ .

The first shaft portion 22 _a1 is vertical linear wire relative to the first engagement portion 21 ₁ of the central axis L at the first engaging portion 21 ₁ of the end (end opposite to the linear wire) It is formed by bending to become. The length of the first shaft portion 22 _a1 is 61 mm.
The first winding portion 22 _b1 is formed by bending the linear wire vertically so as to be parallel to the central axis L on the opposite side of the first shaft portion 22 _a1 from the first engagement portion 21 ₁ . It is formed by bending a linear wire in an arc shape with a curvature radius of 6R. Further, the first root portion of the winding portion 22 _{b 1,} gap narrower 4mm than the distance along the axis of the first central portion of the winding portion 22 _{b 1} is provided along the shaft portion ing.
The second shaft portion 22 _a2 bends the linear wire vertically so as to be on the extension line of the first shaft portion 22 _{a1 on} the side opposite to the first shaft portion 22 _a1 of the first winding portion 22 _b1 . It is formed by. The length of the second shaft portion 22 _a2 is 25 mm.
The connecting portion 22 _c is a first winding portion 22 _b1 (that is, the central axis L of the _first engagement portion 21 ₁ ) on the opposite side of the second winding portion 22 _a2 to the first winding portion 22 _b1. After the linear wire is bent vertically so as to be perpendicular to the wire, the wire is bent in a semicircular shape with a curvature radius of 6R.
The third shaft portion 22 _a3 vertically extends the linear wire so as to be on the extension line of the first and second shaft portions 22 _a1 and 22 _{a2 on} the side opposite to the second shaft portion 22 _a2 of the crossover portion 22 _c . It is formed by bending. The length of the third shaft portion 22 _a3 is 26 mm.
The second winding portion 22 _b2 is formed by bending the linear wire vertically so as to be opposite to the first winding portion 22 _b1 on the opposite side of the _transition portion 22 _{c of} the third shaft portion 22 _a3. Further, it is formed by bending a linear wire in an arc shape with a curvature radius of 6R. In addition, a gap of 4 mm narrower than the distance along the shaft portion at the center of the second winding portion 22 _{b2 is provided at} the base portion of the second winding portion 22 _b2 along the shaft portion. .
The fourth shaft portion 22 _a4 is arranged so as to be on an extension line of the first to third shaft portions 22 _{a1 to} 22 _{a3 on} the side opposite to the third shaft portion 22 _{a3 of} the second winding portion 22 _b2 . It is formed by bending the wire in a vertical direction. The length of the fourth shaft portion 22 _a4 is 35 mm.

The second engaging portion 21 ₂ is parallel to the first and second winding portions 22 _b1 and 22 _b2 on the side opposite to the second winding portion 22 _{b2 of} the fourth shaft portion 22 _a4 . It is formed in a ring shape by bending the other end side of the linear wire into a circular shape only once with a radius of curvature of 5R. The other end of the linear wire is bent and rounded.

Here, the linear wire used for forming the fixture 10 and the retainer 20 is obtained by coating a core wire made of hard steel wire or galvanized steel with a resin whose main raw material is polyethylene. The core wire has an outer diameter of 1 mm, and has an overload resistance that prevents the optical drop cable retainer from falling off the suspension line when 98 N (10 kgf) of excess weight is applied, and there are no harmful abnormalities in use such as cracks and cracks. With such weather resistance. The coating has a tensile strength that does not break at 14.7 Mpa (1.5 kgf / mm ² ), an elongation of 450% or more, a tensile strength residual ratio of 80% or more, and an elongation resistance ratio of 65% or more. It has aging properties.

Next, an optical drop cable support method using this optical drop cable retainer will be described with reference to FIGS.
The worker presses and holds one end of the fixing portion 12 of the fixing device 10 (the left end in FIG. 2) against the hanging wire 5, and then rotates the fixing device 10 about the hanging wire 5 as a rotation axis, thereby The left half shown in FIG. After that, the worker presses the central portion of the fixing portion 12 and then rotates the fixing tool 10 around the hanging wire 5 as a rotation shaft, thereby attaching the right half of the fixing portion 12 to the hanging wire 5 in FIG. Thereby, the fixing tool 10 is fixed to the hanging wire 5 (that is, the fixing tool 10 is a rotation fixing method).
In addition, if the both ends of the fixing | fixed part 12 are sharpened and made into a nail | claw shape, the fixing tool 10 can be firmly fixed to the suspending wire 5 by pressing down both ends of the fixing | fixed part 12 strongly to the suspending wire 5 (stranded wire). .

Subsequently, the worker passes the distal end portion of the first engaging portion 21 ₁ of the retainer 20 through the engaging hole 11 _a of the ring portion 11 of the fixing device 10, and as shown in FIG. The hooking tool 20 is attached to the fixing tool 10 by hooking two spirally wound portions of the first engaging portion 21 ₁ of the drawing tool 20 onto the ring portion 11 of the fixing tool 10.

  Subsequently, the worker separates the core wire 2 and the support wire 3 (see FIG. 4B) of the optical drop cable by about 40 cm using a cable separation tool.

Subsequently, as shown in FIG. 3B, the worker winds the separated support wire 3 around the first winding portion 22 _b1 of the retainer 20 only twice. Thereafter, as shown in FIG. 4A, the operator passes the support wire 3 through the first winding portion 22 _b1 side of the transition portion 22 _c of the retainer 20, and then the second winding portion 22 _b2. Wrap only twice. In order to disperse the tension, it is better to reversely _wind the support wire 3 between the first winding portion 22 _b1 and the second winding portion 22 _b2 .

Subsequently, as shown in FIG. 4 (b), the worker places the first and second vinyl tapes 40 ₁ , 40 on both sides of the separated core wire 2 and support wire 3 at locations about 10 cm from the retainer 20. Fix each with ₂ . Thereafter, the operator winds the separated core 2 by winding the spiral sleeve (see spiral sleeve 4 shown in FIG. 8) around the separated core 2 and the first and second vinyl tapes 40 ₁ and 40 ₂ . Protect.

Although the case where the optical drop cable retainer is used on the utility pole side has been described above, the C-type hardware 130 (see FIG. 7C) fixed to the wall surface of the house or the like is also used on the house side. By attaching the retainer 20 by hooking on the joint portion 21 ₂ , the optical drop cable can be retained in the same manner. In this case, it is not necessary to use the fixture 10.

Next, an optical drop cable retainer according to a second embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 5, the optical drop cable retainer according to the present embodiment has a third winding portion 62 _b3 instead of the crossover portion 22 _c shown in FIG. Different from the optical drop cable retainer according to the first embodiment described above.

Here, the third winding portion 62 _b3 has an arc shape with a narrowed base portion, similarly to the first and second winding portions 62 _b1 and 62 _b2 (third winding portion). 62 the root of _b3, gap narrower 4mm than the distance along the axis of the central portion of the third wound portion 62 _b3 is disposed along the shaft portion.). In addition, the third winding portion 62 _b3 is configured such that the first winding portion 62 _b1 (that is, the first engagement portion 61) is provided on the opposite side of the second shaft portion 62 _a2 to the first winding portion 62 _{b1. After the} linear wire is bent perpendicularly to the central axis ₁ ), the linear wire is bent in an arc shape with a radius of curvature of 6R.

As a result, the support wire 3 separated from the optical drop cable can be wound around the third winding portion 62 _b3 . For example, the first to fourth support wires separated from the first to fourth optical drop cables, for example. By winding 3 _{1 to} 3 ₄ around two of the first to third winding portions 62 _{b1 to} 62 _b3 as follows, a maximum of four optical drop cables in the same direction can be retained.

First support wire 3 ₁ separated from the first optical drop cables, as shown in FIG. 6 (a), after the wound only twice in the first winding portion 62 _b1, portion with a second winding _Wrap it around 62 _b2 only twice. The second support wire 3 ₂ separated from the second optical drop cables, as shown in FIG. 6 (b), after the wound only twice in the first winding portion 62 _b1, third biasing the winding portion _Wrap it around 62 _b3 only twice. Third third support wire 3 ₃ separated from optical drop cables, as shown in FIG. 6 (c), after the wound only twice to the third wound portion 62 _b3, portion with a second winding _Wrap it around 62 _b2 only twice. Fourth fourth support line 3 ₄ separated from optical drop cables, as shown in FIG. 6 (d), after wound only twice in the first winding portion 62 _b1, portion with a second winding _Wrap it around 62 _b2 only twice.

In the above description, the first and second winding portions 22 _b1 and 22 _b2 of the retainer 20 and the first to third winding portions 62 _{b1 to} 62 _b3 of the retainer 60 are arcuate. As long as the root portion is narrowed, another shape (for example, a rectangle) may be used. Further, the shape of the connecting portions 22 _c of the anchor member 20 has been a semicircular, other shapes (e.g., rectangular, etc.) may be used.

It is a figure which shows the structure of the fixing tool 10 and the retainer 20 which the optical drop cable retainer by the 1st Example of this invention comprises. It is a figure for demonstrating the optical drop cable support construction method using the optical drop cable retainer shown in FIG. It is a figure for demonstrating the optical drop cable support construction method using the optical drop cable retainer shown in FIG. It is a figure for demonstrating the optical drop cable support construction method using the optical drop cable retainer shown in FIG. It is a figure which shows the structure of the retainer 60 which the optical drop cable retainer by the 2nd Example of this invention comprises. Figure anchor device 60 shown in 5 is a diagram for explaining the first to fourth first to how the fourth winding the support line 3 ₁ to 3 ₄ separated from optical drop cable. It is a figure which shows the segment metal fitting 110 used in the conventional optical drop cable support construction method, the steel core containing outdoor retainer 120, and the C-type metal fitting 130. FIG. It is a figure for demonstrating the subject in the conventional optical drop cable support construction method.

Explanation of symbols

2 Core wire 3 Support wire 3 _{1 to} 3 _{4 1st} to _4th support wire 4 Spiral sleeve 5 Hanging wire 10 Fixing tool 11 Ring part 11 _a Locking hole 12 Fixing part 20 Tensioning tool 21 ₁ , 21 ₂ First and second 2 engaging portions 22 retaining portions 22 _{a1 to} 22 _a4 first to fourth shaft portions 22 _b1 and 22 _b2 first and second winding portions 22 _c crossover portions 40 ₁ and 40 ₂ first and second Vinyl tape 60 Tensioning devices 61 ₁ , 61 ₂ First and second engaging portions 62 Tensioning portions 62 _{a1 to} 62 _a4 First to fourth shaft portions 62 _{b1 to} 62 _b3 First to third winding portions 110 Divided hardware 120 Steel cored outdoor retainer 130 C-shaped hardware 140 ₁ , 140 ₂ First and second vinyl tape L Central axis

Claims (8)

An optical drop cable retainer used for drawing an optical drop cable,
A fixture (10) formed from two linear wires and fixed to a suspension line (5) laid between supports;
A retainer (20; 60) formed from one wire and attached to the fixture;
Said anchor member is separated support wire from the optical drop cable Bei give _{a;; (62 b1 ~62 b3 22} b1, 22 b2), winding portion for winding the (3 3 ₁ to 3 ₄₎
The fixture is
A ring portion (11) for attaching the retainer;
A fixing portion (12) for fixing the fixture to the hanging line,
The ring portion bends one end of one of the two linear wires into a circular shape at least half a circumference, and has a first straight portion to bend into a circular shape, thereby locking holes (11 After forming _a ), the second straight portion having the same length as the first straight portion is provided, and the other end of the one wire is bent into the same shape as the one end. And
The fixing portion spirally winds one end side of the other linear wire of the two linear wires, and is opposite to the locking holes of the first and second linear portions of the ring portion. After fixing the ring part by winding the part of, is formed by spirally winding the other end side of the other linear wire,
An optical drop cable retainer. 2. The optical drop cable retainer according to claim 1 , wherein both ends of the fixing portion are formed in a claw shape. The retainer is
A first engaging portion (21 ₁ , 61 ₁ ) for engaging the locking hole formed in the ring portion of the fixture and attaching the retainer to the fixture;
A retaining portion (22, 62) for wrapping the supporting wire separated from the optical drop cable to hold the optical drop cable;
The optical drop cable retainer according to claim 1 or 2, further comprising: 4. The optical drop cable retainer according to claim 3 , wherein the first engaging portion is formed by spirally winding one end side of the one linear wire twice or more. A ring-shaped second engagement portion (21 ₂ ) for engaging the retainer with the hook member (130) fixed to the retracting side of the optical drop cable and attaching the retainer to the hook member. The optical drop cable retainer according to claim 3 or 4 , further comprising: The detention part is
A linear shaft,
A first winding portion (22 _b1 ) having a narrow base portion;
A crossover (22 _c ),
A second winding portion (22 _b2 ) having a narrow base portion,
The shaft portion is
A first shaft portion (22 _a1 ) between the first engagement portion and the first winding portion;
A second shaft portion (22 _a2 ) between the first winding portion and the crossover portion;
A third shaft portion (22 _a3 ) between the _transition portion and the second winding portion;
A fourth shaft portion (22 _a4 ) between the second winding portion and the second engagement portion;
The optical drop cable retainer according to claim 5, wherein: The crossing part is formed to be perpendicular to the first winding part,
The second winding part is formed so as to be opposite to the first winding part.
The optical drop cable retainer according to claim 6, wherein: The optical drop cable retainer according to claim 6 or 7 , wherein the retaining portion includes a third winding portion (62 _b3 ) having a narrow base portion instead of the crossover portion.