JP2007288915A - Cross arm and method for installing communication cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cross arm and a method for installing a communication cable wherein even on a square pole where left and right loads are unbalanced, swinging of the cross arm can be easily prevented. <P>SOLUTION: The cross arm 10 for communication cable installation is used to install an optical cable 1 whose left and right loads are unbalanced on a utility pole 4. The cross arm includes: a cylindrical cross arm 11; first anchoring hardware 13<SB>1</SB>attached to an end of the cross arm 11, for fixing one end of a messenger wire 2 separated from an optical cable 1; and second anchoring hardware 13<SB>2</SB>attached to the cross arm 11, for fixing the other end of the messenger wire 2. In the cross arm 11, first and second grooves 12<SB>1</SB>, 12<SB>2</SB>are so formed that they are opposed to each other. The grooves are used to adjust the position of installation of the second anchoring hardware 13<SB>2</SB>stepwise. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a communication cable suspension arm and a communication cable suspension method, and more particularly to a communication cable suspension suitable for suspending a communication cable in which left and right loads are unbalanced in a support such as a utility pole. The present invention relates to a brace and a communication cable suspension method.

  When laying an optical cable, which is a type of communication cable, in the prism (electric pole installed at the position where the optical cable is bent when laying the optical cable almost at a right angle), the inside of the prism (the angle formed by the bent optical cable) When connecting the optical cable to the smaller side of the optical cable, the optical cable is directly attached to the prism, or a brace as used in Patent Document 1 below, for example, is used. On the other hand, when the optical cable is wired outside the prism (the side with the large angle formed by the bent optical cable), the optical cable is directly attached to the prism.

Further, as shown in FIG. 5A, the first and second obstacles such as buildings (hereinafter referred to as “first and second under-line obstacles 5 ₁ and 5 ₂ ” below the optical cable 1). .) Is attached to the _first to _third arm poles _{3 1} to _{3 3 on the first} to _third utility poles 4 ₁ to 4 ₃ (the second utility pole 4 ₂ is a prism). This prevents the optical cable 1 from coming into contact with the first and second underline obstacles 5 ₁ and 5 ₂ . Note that, instead of the arm bracket, a co-extrusion metal fitting can be used, but in this specification, the arm metal and the co-extrusion metal fitting are collectively referred to as “arm metal”.
JP 2002-107592 A

However, even if the optical cable 1 does not come into contact with the first and second underline obstacles 5 ₁ and 5 ₂ in this way, the left and right loads on the second utility pole 4 ₂ (square pole) are unbalanced. The following problems have occurred.
For example, if the load applied between the second and third utility poles 4 ₂ , 4 ₃ is larger than the load applied between the first and second utility poles 4 ₁ , 4 ₂ , the second brace 3 over time. ₂ come loose universal band is fixed to the second electric pole 4 _2, as indicated by a broken line in FIG. 5 (a), the second cross-arm 3 ₂ is swung to the third electric pole 4 ₃ side The optical cable 1 between the first and second utility poles 4 ₁ and 4 ₂ comes into contact with the _first underline obstacle 5 ₁ .

In order to solve such a problem, as shown in FIG. 5B, the fourth utility pole 4 ₄ and the second utility pole 4 ₄ on the extension line of the optical cable 1 between the first and second utility poles 4 ₁ and 4 ₂ are used. The first and second messenger wires 2 ₁ and 2 ₂ are respectively connected to the fifth electric pole 4 ₅ on the extension line of the optical cable 1 between the _third electric pole 4 ₂ and the third electric pole 4 3. The balance between the load applied between the three utility poles 4 ₂ and 4 ₃ and the load applied between the first and second utility poles 4 ₁ and 4 ₂ is also maintained.
However, even in such a solution, the fourth and fifth utility poles 4 ₄ , 4 ₅ do not necessarily exist, and the first and second messenger wires 2 ₁ , 2 ₂ can be there is a problem that the first and below the second line obstacle 5 _1, 5 _2, etc. construction such as is necessary to give consideration so as not to damage the is not easy.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a communication cable suspension arm and a communication cable suspension method that can easily prevent the movement of the arm bracket even in a prism with an unbalanced right and left load.

The arm for a communication cable suspension of the present invention is a arm for a communication cable suspension (10; used for suspending a communication cable (1) in which the left and right loads are unbalanced in the support (4). 50), a first arm for fixing one end of a tubular arm metal (11; 51) and a messenger wire (2) attached to the end of the arm metal and separated from the communication cable. A retaining metal fitting (13 ₁ ; 53 ₁ ) and a second metal fitting (13 ₂ ; 53 ₂ ) attached to the arm metal and for fixing the other end of the messenger wire. First and second grooves (12 ₁ , 12 ₂ ; 52 ₁ , 52 ₂ ) for adjusting the mounting position of the second retaining metal fitting to the arm metal at regular intervals are opposed to each other. It is characterized by being formed.
Here, even if the second retaining metal fitting is attached to the arm metal using a bolt (31 ₂ ; 71 ₂ ) penetrating the first and second grooves formed in the arm metal. Good.
A planar shape of both side surfaces of the first and second grooves is a shape in which a semicircle or a semi-ellipse is continuously arranged, and a semicircle or a semi-circle on one side surface of the first and second grooves. An ellipse and a semicircle or semi-ellipse on the other side of the first and second grooves are opposed to each other, and a minimum distance (W ₁ ) between both side faces of the first and second grooves However, it may be larger than the diameter of the bolt.
The planar shape of both side surfaces of the first and second grooves is a shape in which a semicircle or a semi-ellipse are arranged at predetermined intervals, and a semicircle on one side surface of the first and second grooves. Alternatively, a semi-ellipse and a semi-circle or semi-ellipse on the other side of the first and second grooves are alternately arranged in the longitudinal direction of the arm metal, and both sides of the first and second grooves The minimum surface spacing (W ₂ ) may be larger than the diameter of the bolt.
The first and second grooves may have a shape meandering in an S shape, and the width (W ₃ ) of the first and second grooves may be larger than the diameter of the bolt.
The arm metal (11) has a cylindrical shape with a rectangular cross-sectional shape, and both ends of the end part of the arm metal have screw grooves provided on both ends of the universal arm band (21). First and second through holes for penetrating the two formed mounting rods are formed, and the communication cable suspension arm (10) is connected to the two arm bands. The mounting rod may be fixed to the support by passing the mounting bar through the first and second through holes and then pressing the arm metal toward the universal arm band using a nut.
The arm metal (51) is a co-extrusion protrusion including a cylindrical main body having a rectangular cross-sectional shape and a support provided on a terminal side of the main body, and the communication cable suspension The arm (50) may be fixed to the support by fixing the support part of the arm metal to both ends of the free band (62) with bolts and nuts.

The communication cable suspension method of the present invention uses a communication cable suspension arm of the present invention (10; 50), and a communication cable (1) in which the left and right loads are unbalanced in a cylindrical support (4). A communication cable suspension method for suspending the communication cable, and attaching the communication cable suspension arm to the support so that the arm (11; 51) moves in the circumferential direction of the support. After separating the messenger wire (2) from the communication cable in the first step, the messenger wire on the short span side of the communication cable is fixed to the first retaining metal fitting (13 ₁ ; 53 ₁ ). A second step, a third step of fixing the messenger wire on the long diameter side of the communication cable to the second retaining metal fitting (13 ₂ ; 53 ₂ ), and the second retaining metal fitting to the arm metal Along the longitudinal direction of (11; 51) Ride to find a position where the load between the short diameter side and the long diameter side of the communication cable can be balanced, and when finding a position where the load between the short diameter side and the long diameter side of the communication cable can be balanced, A fourth step of fixing the second retaining metal fitting to the armrest, and a second step of fixing the armrest for suspending the communication cable to the support so that the armrest does not move in the circumferential direction of the support. And 5 steps.
Here, in the first step, a support free band (81) is fixed under a position where the support cable brace (10) of the support is attached, and the free arm band (21). Is attached to the supportable band loosely so that the supportable band is supported by the supportable band, and after the fifth step, the supportable band is supported by the supportable band. It may be removed from the object.
In the first step, a supportable band (91) is fixed under a position where the communication cable suspension arm (50) of the support is attached, and the universal band (62) is used for the support. The supportable band is loosely mounted on the supportable band so that the supportable band is not slipped off, and the supportable band is interposed between the fourth step and the fifth step. May be removed from the support.

  In the communication cable suspension arm and the communication cable suspension method of the present invention, the communication cable can be fixed to the communication cable suspension arm by adjusting the left and right loads on the prisms to be equal. Even in a prism with an unbalanced load, it is possible to easily prevent the brace from shaking.

  For the above purpose, the first and second grooves for adjusting the mounting position of the second retaining bracket for fixing the other end of the messenger wire separated from the communication cable to the arm metal at regular intervals This was realized by forming gold facing each other.

Hereinafter, embodiments of a communication cable suspension arm and a communication cable suspension method of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a communication cable suspending arm metal 10 according to the first embodiment of the present invention includes an arm metal 11 and first and second retaining metal fittings 13 ₁ and 13 ₂ .

  The arm metal 11 has a cylindrical shape with a rectangular cross-sectional shape. On both side surfaces of the end portion of the arm metal 11, there are first and second through holes (not formed) through which two mounting rods provided at both ends of the free arm band 21 and having thread grooves are respectively passed. After the two mounting rods of the free arm band 21 are passed through the first and second through holes of the arm metal 11, respectively, the arm metal 11 is attached to the arm arm 21 using a nut. The communication cable suspension arm 10 can be fixed to the utility pole 4 (support) by being pressed toward the power pole.

A through-hole for allowing the first bolt 31 ₁ for attaching the _first retaining metal 13 ₁ to the arm metal 11 is formed on the upper surface and the lower surface of the distal end portion of the arm metal 11.
In addition, on the upper surface and the lower surface between the distal end portion and the distal end portion of the arm metal 11, the first and the _second for penetrating the second bolt 31 ₂ for attaching the _second retaining metal 132 to the arm metal 11. Two grooves 12 ₁ and 12 ₂ (the second groove 12 ₂ is not shown) are formed. As described later, the first and second grooves 12 _1, 12 ₂ of the shape, the mounting position of the second bolt 31 ₂ is slid to the second dead-end fitting 13 _{and second} cross-arm 11 fixed It can be adjusted at intervals.

The first retaining metal 13 ₁ is formed between a pair of first support portions in which through holes for allowing the first bolts 31 ₁ to pass through are formed at the end portions, and tip portions of the pair of first support portions. comprising a first and a winding portion 14 ₁ which is attached via a thimble. Similarly, the second retaining metal 13 ₂ includes a pair of second support portions in which through holes for penetrating the second bolts 31 ₂ are formed at the end portions, and tips of the pair of second support portions. And a second winding part 14 ₂ attached between the parts through a thimble.
As a result, the pair of first support portions of the first retaining metal 13 ₁ are placed on the upper surface and the lower surface of the distal end portion of the arm metal 11, and the first bolt 31 ₁ is placed on the pair of _first retaining metal members 13 ₁ . After the through hole formed in the support portion of 1 and the through hole formed in the tip portion of the arm metal 11 are passed through, the first bolt 31 ₁ and the first nut 32 ₁ are used for the first retaining metal fitting. 13 by tightening the first support and cross-arm 11 of a pair of _1, it is possible to attach the first anchor fittings 13 ₁ to arm-11.
A pair of second support portions of the second retaining metal 13 ₂ are placed on the upper surface and the lower surface of the portion where the first and second grooves 12 ₁ and 12 ₂ of the arm metal 11 are formed, and the second bolt 31 ₂ to penetrate a groove 12 _1, 12 ₂ first and second of the second dead-end fitting 13 _{and second} pair of through holes and cross-arm 11 which is formed on the second supporting portion, a second bolt 31 first and second grooves 12 ₁ of ₂ cross-arm 11, 12 after moving to a desired position along the _2, the second bolt 31 ₂ and the second nut 32 ₂ and the second anchor brackets 13 by tightening a pair of second supporting portions and arm-11 of _2, the second anchor fitting 13 ₂ to adjust the mounting position can be fixed to the arm-11.

The optical cable 1 which is one type of communication cable is attached to the communication cable suspension arm 10 as follows.
The messenger wire 2 is separated from the optical cable 1 and one of the separated messenger wires 2 is fixed to the first winding part 14 ₁ of the first retaining metal 13 ₁ using a winding grip or the like, and the separated messenger wire is separated. The other of the two is fixed to the second winding portion 14 ₂ of the second retaining metal 13 ₂ using a winding grip or the like.

The shape of the first and second grooves 12 ₁ and 12 ₂ is that the second bolt 31 ₂ is slid to adjust the attachment position of the second retaining metal 13 _{2 to} the arm metal 11 at a constant interval. Even if the second bolt 31 ₂ is loosened, there is little risk that the arm 11 will swing, and even if the second bolt 31 ₂ is loosened over time, the mounting position of the _second retaining metal 13 ₂ will not move. In order to do so, it is as follows.

The planar shape of both side surfaces of the first and second grooves 12 ₁ and 12 ₂ is a semicircle or the like in which the second bolt 31 ₂ is fitted, as shown for the first groove 12 ₁ in FIG. It is a shape in which semi-ellipses are continuously arranged. The semicircle or semi-ellipse on one side of the first and second grooves 12 ₁ , 12 ₂ and the semi-circle or semi-ellipse on the other side face each other. Further, the minimum distance W ₁ between the both side surfaces of the first and second grooves 12 ₁ and 12 ₂ is such that the second bolt 31 ₂ can be slid along the longitudinal direction of the arm bracket 11. is large (e.g., 18 mm ± 5 mm) than the diameter of the second bolt 31 _2.

Instead of the first and second grooves 12 ₁ and 12 ₂ configured as described above, the planar shape of both side surfaces is the second shape as shown for the first groove 12a ₁ in FIG. bolt 31 ₂ is a semi-circular or semi-elliptical and arranged at predetermined intervals shaped to fit, and a semicircular or semi-elliptic semicircle or semi-ellipse and the other side of the one side is cross-arm 11 Alternatively, the first and second grooves 12a ₁ and 12a ₂ that are alternately arranged in the longitudinal direction may be used. In such first and second grooves 12a _1, 12a _2, the minimum distance W ₂ of the first and second grooves 12 _1, 12 ₂ of both sides, the second bolt 31 ₂ first and In order to be able to slide along the second grooves 12 ₁ and 12 ₂ , the diameter is larger than the diameter of the second bolt 31 ₂ (for example, 18 mm ± 5 mm).
In the first and second grooves 12a ₁ and 12a ₂ configured as described above, the second bolt 31 ₂ is provided in comparison with the first and second grooves 12 ₁ and 12 ₂ shown in FIG. You can slide more smoothly.

Further, instead of the first and second grooves 12 ₁ and 12 ₂ , the first and second grooves meandering in an S shape as shown in FIG. 2C for the first groove 12 b ₁ . The grooves 12b ₁ and 12b ₂ may be used. In the first and second grooves 12b ₁ and 12b ₂ as well, the width W ₃ of the first and second grooves 12b ₁ and 12b ₂ is such that the second bolt 31 _{2 is made} to be the first and second grooves. in order to be able to slide along the 12 _1, 12 ₂ is larger (e.g., 18 mm ± 5 mm) than the diameter of the second bolt 31 _2.
In this manner, the first and second grooves 12b constituted _1, 12b _2, first shown in the first and second grooves 12 _1, 12 ₂ and FIG. 2 (b) shown in FIGS. 2 (a) The second bolt 31 ₂ can be slid more smoothly than the first and second grooves 12a ₁ and 12a ₂ .

Next, a method for suspending the optical cable 1 to the utility pole 4 using the arm 10 for suspending a communication cable according to the present embodiment (the communication cable suspending method according to the first embodiment of the present invention) will be described with reference to FIGS. This will be described with reference to 4 (a).
As shown in FIG. 4A, the operator fixes the supportable band 81 under the position where the communication cable suspension arm metal 10 of the utility pole 4 is attached.
Thereafter, the operator attaches the universal arm band 21 onto the supportable band 81 so that the universal armband 21 is supported by the supportable band 81 and does not fall off. At this time, the operator loosely attaches the free arm band 21 to the utility pole 4 so that the arm 11 moves in the circumferential direction of the utility pole 4.

Thereafter, the operator, after the first anchor fitting 13 ₁ was confirmed to be fixed to the arm-11 to separate the messenger wire 2 from the optical cable 1, the load of the optical cable 1 is the smaller side (hereinafter, "short The messenger wire 2 (referred to as the left side in FIG. 1) is fixed to the _first winding portion 14 ₁ of the first retaining metal 13 ₁ .
Thereafter, the operator, the second bolt 31 ₂ After confirming that can be slid along the longitudinal direction of the cross-arm 11, the load of the optical cable 1 is larger side (hereinafter, referred to as "long span side". ) messenger wire 2 (to fix the the right side) of FIG. 1 to the second dead-end fitting 13 second wound portion 14 of the _{2 2.}

Thereafter, the operator, the second bolt 31 ₂ is slid along the longitudinal direction of the cross-arm 11, is balanced position of the load on the short span side and long span side of the optical cable 1 (i.e., cross-arm 11 Is searched for in the circumferential direction of the utility pole 4).
When locate a is balanced position of the load on the short span side and long span side of the optical cable 1, the operator, the second dead-end fittings 13 ₂ arms by a second bolt 31 ₂ and the second nut 32 ₂ Secure to gold 11.

  Thereafter, the operator fixes the free arm band 21 to the utility pole 4 so that the arm 11 does not move in the circumferential direction of the utility pole 4, and then removes the supportable flexible band 81 from the utility pole 4.

Next, a communication cable suspension arm according to a second embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 3, the communication cable suspending arm metal 50 according to the present embodiment includes an arm metal 51 (co-extrusion metal fitting) and first and second retaining metal fittings 53 ₁ and 53 _2. .

  The arm metal 51 includes a cylindrical main body having a rectangular cross-sectional shape, and a support provided on the terminal side of the main body. The support part of the arm metal 51 is fixed to both ends of the free band 62 with bolts and nuts, whereby the communication cable suspension arm metal 50 can be fixed to the utility pole 4 (support object).

A through hole for allowing the first bolt 71 ₁ for attaching the _first retaining metal 531 to the arm metal 51 to pass through is formed at the tip of the arm metal 51.
In addition, on the upper surface and the lower surface of the arm metal 51, first and second grooves 52 ₁ and 52 ₂ for penetrating a _second bolt 71 ₂ for attaching the _second retaining metal 532 to the arm metal 51 are provided. (second groove 52 ₂ is not shown) are formed so as to face each other. The first and second grooves 52 ₁ and 52 _{2 have} the shape shown in FIG. 2A, but the shapes shown in FIGS. 2B and 2C may be used. Good.

,
The first and second retaining fittings 53 ₁ and 53 ₂ are configured in the same manner as the first and second retaining fittings 13 ₁ and 13 ₂ shown in FIG.

Next, a method for suspending the optical cable 1 on the utility pole 4 using the arm 50 for suspending a communication cable according to this embodiment (a communication cable suspending method according to the second embodiment of the present invention) will be described with reference to FIGS. This will be described with reference to 4 (b).
As shown in FIG. 4 (b), the operator attaches the supportable band 91 under the position where the communication cable suspension arm 50 of the utility pole 4 is attached.
Thereafter, the operator attaches the universal band 62 onto the supportable band 91 so that the universal band 62 is supported by the supportable band 91 and does not fall off. At this time, the operator loosely attaches the free band 62 to the utility pole 4 so that the arm metal 51 moves in the circumferential direction of the utility pole 4.

Thereafter, the operator, after the first anchor fitting 53 ₁ was confirmed to be fixed to the arm-51 to separate the messenger wire 2 from the optical cable 1, messenger wire short span side of the optical cable 1 2 ( 3 is fixed to the _first retaining metal 531.
Thereafter, the operator, after confirming that can be slid along the longitudinal direction of the second bolt 71 ₂ cross-arm 51, a messenger wire 2 of long span side of the optical cable 1 (not in Fig. 3 right) the second is fixed to the anchor bracket 53 _2.

Thereafter, the operator, the second bolt 71 ₂ is slid along the longitudinal direction of the cross-arm 51, is balanced position of the load on the short span side and long span side of the optical cable 1 (i.e., cross-arm 51 Is searched for in the circumferential direction of the utility pole 4).
When locate a is balanced position of the load on the short span side and long span side of the optical cable 1, the operator, the second anchor brackets 53 ₂ arm by a second bolt 71 ₂ and the second nut 72 ₂ Secure to gold 51.

  Thereafter, the operator removes the supportable band 91 from the utility pole 4 and then fixes the flexible band 61 to the utility pole 4.

  In the above description, the case where the optical cable 1 is suspended has been described. However, even when other communication cables (such as metal cables) are suspended, the arm for communication cable suspension and the method for suspending the communication cable according to the present invention are provided. Can be used.

It is a figure which shows the structure of the armature 10 for communication cable suspension by the 1st Example of this invention. It is a figure for demonstrating the shape of the 1st and 2nd groove | channels 12 ₁ and 12 ₂ formed in the armrest 11 shown in FIG. 1, (a) is the 1st groove | channel 12 ₁ shown in FIG. is a diagram showing the shape, (b) is a diagram of the first groove 12a ₁ of the shape that can be used in place of the first groove 12 _1, (c) the first place of the grooves 12 ₁ it is a diagram of the first groove 12b ₁ of the shape that can be used for. It is a figure which shows the structure of the armband 50 for communication cable suspension by the 2nd Example of this invention. It is a figure for demonstrating the Example of the communication cable suspension method by this invention, (a) is the communication cable suspension by the 1st Example using the arm 10 for communication cable suspensions shown in FIG. It is a figure for demonstrating a method, (b) is a figure for demonstrating the communication cable suspension method by the 2nd Example using the brace | hook 50 for communication cable suspension shown in FIG. It is a figure for demonstrating a prior art and its problem.

Explanation of symbols

1 Optical cable 2, 2 ₁ , 2 ₂ Messenger wire 3 _{1 to} 3 ₃ , 11, 51 Arm metal 4, 4 ₁ to 4 ₅ Telephone pole 5 ₁ , 5 ₂ Obstacle 10 under line ₂ , 50 Communication cable suspension arm 12 ₁ , 12 ₂ , 12 a ₁ , 12 a ₂ , 12 b ₁ , 12 b ₂ , 52 ₁ , 52 ₂ grooves 13 ₁ , 13 ₂ , 53 ₁ , 53 ₂ retaining metal fittings 14 ₁ , 14 ₂ winding part 21 free arm band 31 ₁ , 31 _2, 71 _1, 71 ₂ bolt 32 _1, 32 _2, 72 _1, 72 ₂ nut 62 freely band 81, 91 supporting universal band
W ₁ , W ₂ , W ₃ minimum interval

Claims (10)

A communication cable suspension arm (10; 50) used to suspend the communication cable (1) in which the left and right loads are unbalanced in the support (4),
A cylindrical brace (11; 51);
A first retaining metal fitting (13 ₁ ; 53 ₁ ) for fixing one end of a messenger wire (2) attached to the tip of the arm metal and separated from the communication cable;
A second retaining bracket (13 ₂ ; 53 ₂ ) attached to the arm and for fixing the other end of the messenger wire;
Comprising
First and second grooves (12 ₁ , 12 ₂ ; 52 ₁ , 52 ₂ ) for adjusting the mounting position of the second retaining metal fitting to the arm metal at regular intervals are formed on the arm metal. Formed facing each other,
An arm for a communication cable suspension. The second retaining metal fitting is attached to the arm metal using a bolt (31 ₂ ; 71 ₂ ) penetrating the first and second grooves formed in the arm metal. The brace for hanging a communication cable according to claim 1. The planar shape of both side surfaces of the first and second grooves is a shape in which a semicircle or a semi-ellipse is continuously arranged,
A semicircle or semi-ellipse on one side of the first and second grooves and a semicircle or semi-ellipse on the other side of the first and second grooves are opposed to each other;
A minimum distance (W ₁ ) between both side surfaces of the first and second grooves is larger than a diameter of the bolt;
The brace for suspending a communication cable according to claim 2, wherein The planar shape of both side surfaces of the first and second grooves is a shape in which semicircles or semi-ellipses are arranged at predetermined intervals,
A semicircle or semi-ellipse on one side of the first and second grooves and a semi-circle or semi-ellipse on the other side of the first and second grooves alternate in the longitudinal direction of the brace. Has been
A minimum distance (W ₂ ) between both side surfaces of the first and second grooves is larger than a diameter of the bolt;
The brace for suspending a communication cable according to claim 2, wherein The first and second grooves have a shape meandering in an S-shape;
A width (W ₃ ) of the first and second grooves is larger than a diameter of the bolt;
The brace for suspending a communication cable according to claim 2, wherein The arm metal (11) has a cylindrical shape with a rectangular cross-sectional shape,
First and second through holes for penetrating two mounting rods provided at both ends of the universal arm band (21) and formed with screw grooves are formed on both side surfaces of the end portion of the arm metal. Formed,
The communication cable suspending arm (10) passes the two attachment rods of the universal arm band through the first and second through holes, and then uses the nuts to attach the arm to the arm. Fixed to the support by pressing towards the armband,
An arm for a communication cable suspension according to any one of claims 1 to 5, wherein The arm metal (51) is a protruding metal fitting for collocation provided with a cylindrical main body part having a rectangular cross-sectional shape and a support part provided on the terminal side of the main body part,
The communication cable suspension arm (50) is fixed to the support by fixing the support portions of the arm metal to both ends of the universal band (62) by bolts and nuts.
An arm for a communication cable suspension according to any one of claims 1 to 5, wherein The communication cable suspension arm according to any one of claims 1 to 7 is used to suspend the communication cable (1) in which the left and right loads are unbalanced in the cylindrical support (4). A communication cable suspension method for suspending,
A first step of attaching the communication cable suspension arm to the support so that the arm (11; 51) moves in the circumferential direction of the support;
A second step of fixing the messenger wire on the short span side of the communication cable to the first retaining metal fitting (13 ₁ ; 53 ₁ ) after separating the messenger wire (2) from the communication cable;
A third step of fixing the messenger wire on the long span side of the communication cable to the second retaining metal fitting (13 ₂ ; 53 ₂ );
The second retaining metal is slid along the longitudinal direction of the arm metal (11; 51) to find a position where the load between the short diameter side and the long diameter side of the communication cable can be balanced, and the communication cable A second step of fixing the second retaining metal fitting to the arm metal when a position where the load between the minor axis side and the major axis side can be balanced is found;
A fifth step of fixing the communication cable suspension arm to the support so that the arm does not move in the circumferential direction of the support;
A communication cable suspension method comprising the steps of: In the first step, a support band (81) is fixed under a position where the support cable brace (10) of the support is attached, and the universal arm band (21) is supported by the support band (21). The free arm band is loosely mounted on the support free band so as not to fall off supported by the free use band.
After the fifth step, the supportable band is removed from the support.
The communication cable suspension method according to claim 8, wherein: In the first step, a supportable band (91) is fixed under a position where the communication cable suspension arm (50) of the support is attached, and the universal band (62) is used for the support. The free band is loosely attached on the free band for support so that it does not fall off supported by the free band,
Removing the supportable band from the support between the fourth step and the fifth step;
The communication cable suspension method according to claim 8, wherein:

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