JP2005341687A - Method for sharing upper branch line, common metal fitting of upper branch line and tension adjuster of upper branch line - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for sharing an upper branch line that can easily and safely lay the branch line that is difficult in laying for the reason that negotiation for the procurement of a site is troublesome, there are restrictions in terms of a space, and the appearance of an environment might be impaired; and to provide a common metal fitting of the upper branch line and a tension adjuster of the upper branch line. <P>SOLUTION: When anchoring a plurality of cables 2A to 2C installed to an electric pole 1, the upper branch lines 3A to 3C are aggregated into one piece by concentrating tensions created by the cables 2A to 2C with respect to the upper branch lines that are necessary for the cables 2A to 2C in the same number of pieces of the cables. An imbalanced load to the electric pole 1 that shares the upper branches is dispersed by making tensional directions caused by the upper branches coincide with one another. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an upper branch line shared method, an upper branch line shared metal fitting, and an upper branch line tension adjuster used in the field civil engineering field of an aerial structure composed of electric wires, branch lines, cables, and the like.

  A branch line is required when securing cables to the utility pole. As shown in FIG. 16, it is possible to configure a safe facility by sharing the load on the utility pole 100 caused by the tension of the cables 111, which is generated when the cables 111 are retained on the utility pole 100, with the branch line 121. (Patent Document 1, Non-Patent Document 1). In FIG. 16, the anchor 131 connects the branch line 121 to the ground.

By the way, when a cable is added to the utility pole 100, the same number of branch lines as the number of cables to be secured to the utility pole 100 are required. As shown in FIG. 17, the upper branch line 122A and the lower branch line 122B for the added cable 112 are added to the branch line 121 as shown in FIG. 17, and only the upper branch line 123 is added as shown in FIG. However, the lower branch line may be shared. In FIG. 17, the upper branch line 122 </ b> A and the lower branch line form a branch line 122.
Japanese Utility Model Publication No. 6-12539 "Branch line anchor Chico anchor 80 type" Catalog issued by Nippon Geotechnical Co., Ltd.

  By the way, in the case of adding a branch line, the same number of branch lines and anchors as the number of cables to be retained on the utility pole are required, and the work of adding the cable due to the addition of the branch line or the embedment of the anchor becomes complicated. In the case where the lower branch line is shared, it is very difficult to adjust the tension F101, as shown in FIG. As the upper branch line increases, the adjustment becomes more difficult. In addition, when adding or replacing a branch line, since a large tension of the cable is shared by the branch line, extremely careful and dangerous work is required.

  Moreover, in order to protect human bodies, such as a pedestrian, from the wire used for the upper branch line, the branch line guard is attached to the branch line. For this reason, complaints from nearby residents may occur due to the loss of aesthetics when there are multiple upper branch lines. For these reasons, there is a risk that an unsafe facility may be constructed because the branch line cannot be taken with respect to the facility that is supposed to have a branch line.

  The present invention solves the above-mentioned problem, and it is possible to easily and safely install a branch line that is difficult to install due to reasons such as negotiating with a normal site, spatial limitations, and loss of aesthetics. It is an object to provide a method, an upper branch line common fitting, and an upper branch line tension adjuster.

In order to solve the above-mentioned problem, the invention of claim 1 concentrates the tension of each cable on the upper branch line that is required in the same number as the cables when securing a plurality of cables installed on a power pole. Thus, the upper branch line sharing method is characterized by combining these upper branch lines into one.
According to a second aspect of the present invention, in the upper branch line sharing method according to the first aspect, the unbalanced load applied to the utility pole when the upper branch line is shared is distributed by making the tension directions of the upper branch lines the same. It is characterized by doing.
According to a third aspect of the present invention, in the upper branch line sharing method according to the first or second aspect, the upper branch line that can be expanded and contracted between each retaining position of the cables added to the utility pole and the one upper branch line. A common metal fitting is provided, and this upper branch line is shared by the upper part.
According to a fourth aspect of the present invention, in the upper branch line sharing method according to the third aspect, an upper branch line tension adjuster that can be expanded and contracted is attached to the one upper branch line, and the tension of the upper branch line is adjusted. And
The invention according to claim 5 is the upper branch line shared metal fitting according to claim 3 or 4, wherein the fixing means fixed to the upper branch line side, the connection means attached to the retaining position side of the added cables, It is an upper branch line common metal fitting which has an adjustment means which adjusts the interval of a fixing means and the above-mentioned connection means.
The invention according to claim 6 is the upper branch line tension adjuster according to claim 5, wherein the first fixing means is fixed to the upper branch line, is fixed to the upper branch line, and the first fixing is performed. An upper portion comprising: a second fixing means fixed at a position different from the fixing position of the means; and an adjusting means for adjusting an interval between the first fixing means and the second fixing means. This is a branch tension adjuster.

  ADVANTAGE OF THE INVENTION According to this invention, the addition of a branch line required when the cable fastened to a utility pole is added can be implemented easily and safely. In other words, it is possible to realize equipment construction that combines economic efficiency and aesthetic maintenance.

Next, the best mode for carrying out the present invention will be described with reference to the drawings.
[Embodiment 1]
FIG. 1 is an explanatory diagram for explaining an upper branch line sharing method according to the present invention. Normally, when installing a new facility, the cable 2A is secured to the utility pole 1 standing on the ground. In this case, one branch line 3 is installed for the utility pole 1 to which the cable 2A is secured. At this time, one end of the branch line 3 is attached to the holding position A of the cable 2 </ b> A, and the other end of the branch line 3 is connected to the ground by the anchor 4. The branch line 3 shares the load on the utility pole 1 due to the tension of the cable 2 </ b> A that is generated when the cable 2 </ b> A is retained on the utility pole 1.

  Thereafter, when a cable is further added, the cable 2B is fastened to the utility pole 1. At this time, a telescopic rod-shaped upper branch common bracket 10 is attached between the holding position B of the cable 2B and the upper branch 3A of the branch 3 instead of the upper branch. As a result, the load on the utility pole 1 due to the tension of the cable 2B is shared. That is, when a plurality of cables 2A and 2B installed on the utility pole 1 are secured, the tensions of the cables 2A and 2B are concentrated on the upper branch line 3A, and the same number of upper branch lines as the cables 2A and 2B are required. It is summarized in a book.

  When attaching the upper branch line common bracket 10, as shown in FIG. 2, the angle θ1 between the utility pole 1 and the upper branch line common bracket 10 is an obtuse angle. Thereby, the direction of the tension F1 of the upper branch line 3A is the same as the direction of the force F2 applied to the upper branch line common bracket 10, and the load applied to the utility pole 1 by the cable 2B can be distributed to the branch line 3. 1A and 1B in FIG. 1 are bands for fixing the cables 2A and 2B attached to the retaining positions A and B to the utility pole 1.

  As shown in FIG. 3, when the angle θ1 between the utility pole 1 and the upper branch shared bracket 10 is an acute angle as shown in FIG. 3, the force F3 applied to the upper branch shared bracket 10 is the tension of the upper branch 3A. It will deviate from the direction. For this reason, it is impossible to apply a sufficiently large force that functions as a branch line, and it is impossible to distribute the load.

  In this way, when the cable 2B is added, the load applied to the utility pole 1 can be distributed by the construction for sharing the upper part of the branch line 3 by using the extendable upper branch line common bracket 10. In addition, as shown in FIG. 4, the upper branch shared bracket 10 as an attachment is added to the existing equipment by the number of cables 2B to 2C to be added, as shown in FIG. 4, and as shown in FIG. By making the angles θ1 and θ2 between the upper branch line common brackets 10 and the utility pole 1 be obtuse, an easy and safe facility can be constructed. In FIG. 5, 1A to 1C are bands for the cables 2A to 2C.

[Embodiment 2]
FIG. 6 is a front view showing the upper branch line shared metal fitting according to the present invention. This upper branch line shared bracket is the upper branch line shared bracket 10 used in the first embodiment. 6 includes a fixing portion 11 as a fixing means, a screw adjusting portion 12 as an adjusting means, and a bolt hook portion 13 as a connecting means.

  As shown in FIG. 7, the fixing portion 11 is fixed with the upper branch line 3A interposed therebetween, and a cylindrical fixing base 11B is formed on a rectangular parallelepiped base portion 11A. A holding curved plate 11E is provided on the side surface of the fixed base 11B so as to be movable with respect to the fixed base 11B by a press screw 11C and a nut 11D. The holding screw 11C penetrates the fixed base 11B. According to the fixing portion 11 having this structure, the upper branch line 3A is sandwiched between the fixing base 11B and the holding curved plate 11E, and the holding curved plate 11E is moved toward the fixing base 11B by the nut 11D, so that the upper branch line 3A is moved. Fix to the fixing part 11.

  In addition to the structure described above, a screw 11F is attached to the side surface of the base portion 11A of the fixing portion 11, and the screw 11F is fixed to the fixing portion 11.

  The screw adjusting portion 12 has a rectangular parallelepiped shape, and a screw hole 12A is formed on the side surface of the screw adjusting portion 12 facing the side surface of the fixing portion 11 provided with the screw 11F. The screw hole 12A is provided with a screw for the screw 11F, and the screw 11F can be inserted into the screw hole 12A. In addition to this structure, a hook attachment hole 12B is provided inside the screw adjustment portion 12, and a hook attachment groove 12C is provided on the side surface of the screw adjustment portion 12 facing the bottom portion of the screw hole 12A. The hook attachment hole 12B has a circular shape, and the hook attachment groove 12C has a circular shape having a smaller diameter than the hook attachment hole 12B. The hook attachment groove 12C is penetrated by the hook attachment hole 12B.

The bolt hook portion 13 has a hook shape with one end curved, and a hook portion 13A having a rod shape at the other end. The rod-like end of the hook portion 13A passes through the hook attachment groove 12C of the screw adjustment portion 12 and reaches the hook attachment hole 12B. As shown in FIG. 8, the rod-shaped portion of the hook portion 13 </ b> A can rotate in the hook attachment groove 12 </ b> C of the screw adjustment portion 12. A hook bottom plate 13B is attached to the rod-shaped end of the hook portion 13A. The hook bottom plate 13B can rotate in the hook attachment hole 12B. The bolt hook portion 13 having such a structure is hooked on a bolt 1B ₁ (FIG. 7) for fixing the band 1B of the cable 2B. Moreover, the space | interval from the bolt hook part 13 to the fixing | fixed part 11 can be expanded-contracted by rotating the screw adjustment part 12 forward / reversely in the arrow H direction (FIG. 8). That is, the upper branch line common bracket 10 can be expanded and contracted.

  Next, an upper branch line sharing method using the upper branch line sharing bracket according to the present embodiment will be described. As shown in FIG. 9, when a cable 2 </ b> B is newly added to the utility pole 1 on which the cable 2 </ b> A is held, a turnbuckle 3 </ b> B that tensions the branch line 3 is attached to the upper branch line 3 </ b> A of the branch line 3. As shown in FIG. 10 (a), the hook portion 13 </ b> A of the upper branch shared bracket 10 is attached to the band 1 </ b> B of the added cable 2 </ b> B, and the fixing portion 11 is attached to the upper branch 3 </ b> A of the branch 3. After the fixing portion 11 is attached, the screw adjusting portion 12 is turned to shorten the length of the upper branch line common bracket 10.

  Thereafter, by using the turnbuckle 3B that is already attached, as shown in FIG. 10 (b), the upper branch line 3A can be retightened to create an upper shared form in which the load is properly shared. Further, by giving the curvature radius to the shape of the holding curved plate 11E of the fixing portion 11 that holds the upper branch line 3A, it is possible to disperse the local load on the upper branch line 3A. Furthermore, when another cable is added, it is possible to cope by adding the same upper branch line common metal fitting 10.

[Embodiment 3]
In the present embodiment, as shown in FIG. 11, a case where the turnbuckle 3B of the second embodiment is not provided will be described.

  In this embodiment, since the turnbuckle is not attached to the branch line 3, the upper branch line tension adjusting tool shown in FIG. 12 is used instead of the turnbuckle. The upper branch line tension adjuster in FIG. 12 is the same as the upper branch line common bracket in FIG. In FIG. 12, components that are the same as or the same as those in FIG. 6 described above are denoted by the same reference numerals, and description thereof is omitted. In FIG. 12, the first fixing means is the fixing portion 11, the second fixing means is the bolt hook portion 13, and the adjusting means is the screw adjusting portion 12. When the upper branch line tension adjusting tool of FIG. 12 is used as a turnbuckle, for example, the annular portion 3B of the upper branch line 3A is connected to the bolt hook portion 13 and is fixed by the fixing base 11B, the holding screw 11C, the nut 11D, and the holding curved plate 11E. The upper branch line 3 </ b> A is fixed to the fixing part 11.

  Thereafter, similarly to the second embodiment, the hook portion 13A of the upper branch shared bracket 10 is attached to the band 1B of the added cable 2B, and the fixing portion 11 is attached to the upper branch 3A of the branch 3. After the fixing portion 11 is attached, the screw adjusting portion 12 is turned to shorten the length of the upper branch line common bracket 10. Then, by turning the screw adjustment part 12 of the upper branch line common fitting to retighten the upper branch line 3A and turning the screw adjustment part 12 of the upper branch line tension adjustment tool to reduce the upper branch line tension adjustment tool, It is possible to create an upper shared form that is properly shared.

By the way, when the screw adjustment part 12 of the upper branch line tension adjusting tool is turned to retighten the upper branch line 3A, the upper branch line 3A between the fixing part 11 and the bolt hook part 13 may become longer and bend greatly. In this case, the upper branch line tension adjusting tool of FIG. 13 is used instead of the upper branch line tension adjusting tool of FIG. In FIG. 13, components that are the same as or the same as those in FIG. 6 described above are denoted by the same reference numerals, and description thereof is omitted. Upper branch tensioner of Figure 13 is provided with respect to the upper branch tensioner of FIG. 12, as shown in FIG. 14, a similar fixed portion 11 ₁ and the fixed portion 11. FIG. 14 is a view of FIG. 13 viewed from the direction of arrow J.

The upper branch line tension adjuster of FIG. 13 has two fixing parts of the upper branch line common bracket in parallel. When this upper branch line tension adjusting tool is used, the existing upper branch line 3A is fixed by the fixing part 11, and the upper branch line 3A is tensioned by the screw adjusting part 12. Thereafter, as shown in FIG. 15, to cut the upper branch 3A, through the upper branch 3A in the fixing unit 11 ₁ is fixed to the fixing portion 11 _1. Thereby, the upper branch line 3A is cut off to become the branch line rod 3D, and the length between the branch line rod 3D and the upper branch line 3A can be adjusted very easily by the screw adjusting portion 12. Incidentally, in FIG. 15 shows a state of fixing the existing upper branch 3A in a fixed portion 11, 11 _1.

  The embodiment of the present invention has been described in detail above, but the specific configuration is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention, the present invention is not limited to this embodiment. included.

It is explanatory drawing for demonstrating the upper branch line sharing method by this invention. It is explanatory drawing for demonstrating the upper branch line sharing method by this invention. It is explanatory drawing for demonstrating the upper branch line sharing method by this invention. It is explanatory drawing for demonstrating the addition method of an upper branch line shared metal fitting. It is explanatory drawing for demonstrating the addition method of an upper branch line shared metal fitting. It is a front view which shows the upper branch line shared metal fitting by this invention. It is explanatory drawing for demonstrating the usage method of an upper branch line shared metal fitting. It is sectional drawing which shows the II cross section of FIG. It is explanatory drawing for demonstrating the upper branch line sharing method using the upper branch line shared metal fitting of FIG. It is explanatory drawing for demonstrating the upper branch line sharing method using the upper branch line shared metal fitting of FIG. It is explanatory drawing for demonstrating the other upper branch line sharing method by this invention. It is explanatory drawing for demonstrating the upper branch line tension adjusting tool by this invention and another upper branch line sharing method. It is explanatory drawing for demonstrating the upper branch line tension adjusting tool by this invention and another upper branch line sharing method. It is explanatory drawing explaining the structure of an upper branch line tension adjusting tool. It is explanatory drawing explaining retightening of the upper branch line by an upper branch line tension adjusting tool. It is explanatory drawing for demonstrating a branch line. It is explanatory drawing for demonstrating the shared form of a branch line at the time of a cable addition. It is explanatory drawing for demonstrating the shared form of a branch line at the time of a cable addition. It is explanatory drawing for demonstrating the tension | tensile_strength adjustment method of a branch line in the case of the form shown by FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Utility pole 1A, 1B Band 2A, 2B Cable 3 Branch line 3A Upper branch line 3B Turnbuckle 3C Annular part 3D Branch line rod 4 Anchor 10 Upper branch shared bracket 11 Fixing part 11A Base part 11B Fixing base 11C Holding screw 11D Nut 11E Holding curved plate 11F Screw 12 Screw adjustment part 12A Screw hole 12B Hook attachment hole 12C Hook attachment groove 13 Bolt hook part 13A Hook part 13B Hook bottom plate

Claims (6)

  When securing a plurality of cables (2A to 2C) installed on the utility pole (1), the same number of upper branch lines as the cables (2A to 2C) are required, depending on the cables (2A to 2C). A method for sharing the upper branch line, which concentrates the tension and collects the upper branch lines (2A to 2C) into one.   The method of sharing an upper branch line according to claim 1, wherein the unbalanced load applied to the utility pole (1) when the upper branch line is shared is distributed by making the tension directions of the upper branch lines the same. .   An extendable upper branch common bracket is provided between each cable holding position added to the utility pole (1) and the one upper branch (3A), and the upper branch (3A) is shared by the upper part. The upper branch line sharing method according to claim 1, wherein the upper branch line is shared.   The upper branch line sharing method according to claim 3, wherein an upper branch line tension adjusting tool capable of expanding and contracting is attached to the one upper branch line (3 </ b> A), and the tension of the upper branch line (3 </ b> A) is adjusted. The upper branch line common bracket according to claim 3 or 4,
Fixing means (11) fixed to the upper branch line (3A) side;
A connection means (13) attached to the holding position side of the added cables;
An adjusting means (12) for adjusting an interval between the fixing means (11) and the connecting means (13);
A metal fitting for upper branch line, characterized by comprising: The upper branch line tension adjuster according to claim 5,
First fixing means (11) fixed to the upper branch line (3A);
Second fixing means (13) fixed to the upper branch line (3A) and fixed to a position different from the fixing position of the first fixing means (11);
Adjusting means (12) for adjusting the distance between the first fixing means (11) and the second fixing means (13);
An upper branch line tension adjuster characterized by comprising:

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