JP3590890B2 - Wire tension adjuster - Google Patents

Wire tension adjuster Download PDF

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Publication number
JP3590890B2
JP3590890B2 JP2001095185A JP2001095185A JP3590890B2 JP 3590890 B2 JP3590890 B2 JP 3590890B2 JP 2001095185 A JP2001095185 A JP 2001095185A JP 2001095185 A JP2001095185 A JP 2001095185A JP 3590890 B2 JP3590890 B2 JP 3590890B2
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tension
spring
wire
locking member
pole
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JP2002291143A (en
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裕之 山口
剛 新井
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日本地工株式会社
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Description

【0001】
【発明の属する技術分野】
本発明は、通信ケーブルの架設に用いる吊線または電線の架設に用いる吊線等のように電柱に設けられた架線への着雪または風圧等が作用した際の荷重変化に伴い、その張力を調整することによって電柱への過負荷を低減するようにした架線張力調整具に関するものである。
【0002】
【従来の技術】
通信ケーブルを電柱に架設するための従来方法は、図6(a)に示すように、既設電柱50に電柱用バンド51をボルト52で締結し、このバンド51のボルト締結部に吊線53の連結輪53aを結合したうえで、該吊線53に所定間隔で通信ケーブル54を吊設するようにしている。
【0003】
このように吊線53を設けた場合、吊線53や通信ケーブル54に着雪、強風等による負荷がかかると吊線53の張力によって電柱50が過負荷を受けるため、電柱50が折壊したり倒壊するという危険な事態に至る。
【0004】
このため、従来は、既設電柱に支線を張って電柱を補強していたのであるが、昨今の用地事情等による支線施設スペースの減少の問題、さらに支線施設後の地先からの取り外し要請等、支線補強設備への課題が新たに生じているのが現状である。
【0005】
一方、電柱を無支線化した場合、強風、着雪等の異常時の荷重変化に適合させるために、電柱の強度増強が必要となり、既設柱については高強度柱への建て替え工事が要求される事態もあって電線路のコストアップが伴い、さらに場所によっては建替工事事態が不可能であるという問題もあった。
【0006】
このような問題を解消する手段として、図6(b)に示すように、吊線53に作用する張力を低減するために吊線53の途中に張力調整具57を設けることが開発されている。
【0007】
この張力調整具57は、図6(b)に示すように、円筒形のケース58に収容されたコイルスプリング59をロッド60の端部の係止金具59aで係止し、該ロッド60の延長端部の連結部61とその反対側のケース58の端部に設けられた連結部62とを吊線53の間に結合するものである。
【0008】
従って、この張力調整具57をケーブル接続箱55から電柱50側の吊線53の余長を利用して取り付けるには、吊線53を断線したり、この断線した吊線53の端部に張力調整具57を結合するための端末処理を施したり、ケーブル接続箱55の位置を変更する等のストロークFの距離を移動するための大掛かりな作業が必要となる。
【0009】
一方、図7(a) に示すように、電柱50に架設する電線62においても、上記と同様の問題がある。即ち、電柱50に電線62を架設する際、既設電柱50に電柱用バンド51をボルト52で締結し、このバンド51のボルト締結部に碍子63を設けた連結部材64を接続して碍子63に吊線53の端部の連結輪65aを結合するものであるが、吊線53や電線62に着雪、強風等による負荷がかかると、吊線53の張力によって電柱50が過負荷を受けるため、電柱50が折壊したり、倒壊するという問題があった。
【0010】
このため、図7(b) に示すように、吊線53の途中に張力調整具57を設けるのであるが、上記の場合と同様に、吊線53を断線したり、この断線した吊線53の端部に張力調整具57を結合するための端末処理を施したり、接続端子67の位置を変更する等のストロークGの距離を移動するための大掛かりな作業が必要となる。
【0011】
【発明が解決しようとする課題】
本発明は、上記の事情に鑑みてなされたもので、通信ケーブルまたは電線を電柱に架設する際、通信ケーブルの架設に用いる吊線または電線の架設に用いる吊線に作用する荷重の変化に連動して自動的に吊線の張力を低減することによって電柱に加わる過負荷を調整することにより、電柱の保護を図り、また電柱の建替工事等の必要がした架線張力調整具を提供することを目的とする。
【0012】
【課題を解決するための手段】
上記の目的を達成するために、本発明の請求項1の架線張力調整具は、長辺部と短辺部を有する略く字形をなす2枚のプレートを所定幅で離間して対向させて成るバネ係止部材の前記長辺部と短辺部との交わる頂部の凸側に係止部が設けられ、前記バネ係止部材の凹側が電柱側に向けられると共に、前記バネ係止部材の係止部の中央の通孔には長尺のネジ棒が挿通され、該ネジ棒の内端が一方の電柱用バンドの締結部に結合され、前記バネ係止部材の係止部の外方へ伸長したネジ棒にコイルバネを外挿して調整ナットで固定し、さらに前記バネ係止部材の長辺部側の端部に形成された通孔が他方の電柱用バンドの締結部を支点として上下方向に回動自在に結合されると共に、該バネ係止部材の短辺部側の端部に形成された通孔が架線の端部に結合された構成により、既設の電柱用バンドに架設していた架線の長さを変えることなく既設の架線に取付け可能にすると共に、該架線の張力に応じて前記コイルバネのバネ力に抗して回動する前記プレートの架線結合部の位置を変動することにより、該架線の張力を自動的に調整するようにしたことを特徴とする。
【0013】
【発明の実施の形態】
以下、本発明の実施例について参照しながら説明する。
【0014】
本実施例は架線張力調整具を単一のコイルバネを用いて構成したものであり、図1に示すように、長辺部と短辺部を有する略く字形をなす2枚のプレート3a、3aを所定幅で離間して対向させ、該プレートの凹側を電柱50側に向け、長辺部と短辺部の交わる頂部の凸側に係止部12を設けた構成であるバネ係止部材3とする。また、このバネ係止部材3の係止部12の中央には通孔12aが形成され、該通孔12aには長尺のネジ棒5が挿通され、該ネジ棒5の内端には通孔14aを有する係止片14が設けられている。一方、電柱50の上下位置に所定間隔をあけて締結された一対の電柱用バンド51、51が設けられ、上記の係止片14の通孔14aが一方の電柱用バンド51の締結部4aに結合されている。また、バネ係止部材3の係止部12の外方へ伸長したネジ棒5に対して係止部1 2の内側に位置決めナット7を締結する一方、該ネジ棒5の外方伸長部にコイルバネ8を外挿して調整ナット9で固定している。さらに、バネ係止部材3のプレート3a、3aの長辺部側の端部には通孔3cが形成され、他方の電柱用バンドの締結部2aを支点として上下方向に回動自在に結合されると共に、プレート3a、3aの短辺部側の端部には通孔3bが形成され、吊線53の端部に結合されている。このような構成により、既設の電柱用バンド51に架設していた吊線53の長さを変えることなく既設の吊線53に取付けることができるようにし、該吊線53の張力に応じてコイルバネ8のバネ力に抗して回動するバネ係止部材3の架線結合部の位置を変動することにより、該架線の張力を自動的に調整するようにしたものである。
【0015】
このような構成についてより詳細に述べると、この架線張力調整具を既設の電柱50に使用する場合、一対の電柱用バンド51、51の一方は既設の電柱用バンド51を使用することができ、既に締結されている電柱用バンド51の上方または下方に所定間隔を空けてもう一個の電柱用バンド51を締結する。
【0016】
電柱用バンド51の構成は、電柱50の外径に対応する数片のバンド片51a、51a…をボルト51bで止めて一個の電柱用バンド51としてあり、この電柱用バンド51の両側突出片49、49に設けられた通孔49a、49aにボルト2aを挿通してナット2bで締結したものである。
【0017】
本実施例における架線張力調整具のバネ係止部材3は、長辺部と短辺部を有する略く字形をなす2枚のプレート3a、3aを所定幅で離間して対向させると共に、長辺部と短辺部の交わる頂部の凸側に設けた係止部12の中央には通孔12aが形成され、バネ係止部材3の長辺部側の端部には通孔3cが形成され、短辺部側の端部には通孔3bが形成されてなるものである
【0018】
そして、バネ係止部材3の係止部12の通孔12aには長尺のネジ棒5が挿通されると共に、該ネジ棒5の内端には通孔14aを有する係止片14が固設され、係止部12の外方へ伸長したネジ棒5に対して係止部12の内側に締結した位置決めナット7と該ネジ棒5の外方伸長部にコイルバネ8を外挿してその外側に大径の座金10を介して締結した調整ナット9を設けた構造としているので、該位置決めナット7がてこの力点として作用し、位置決めナット7によって位置決めされたコイルバネ8のバネ力を調整ナット9の締付け具合によって調整するようにしている。
【0019】
このようなバネ係止部材3を一方の電柱用バンド51(図1においては上方の電柱用バンド51)に取り付ける際、バネ係止部材3の両側プレート3a、3aの隙間幅を規定するためにスリーブ15を介して電柱用バンド51の両側突出片49、49の通孔49a、49aにボルト2aを挿通してナット2bで締結した部位をてこの支点S1として作用させ、その周りにバネ係止部材3を上下方向に回動自在に枢設した構成としている。
【0020】
また、バネ係止部材3の係止部12に挿通されたネジ棒5の内端には係止片14が固設され、他の電柱用バンド51(図1においては下方の電柱用バンド51)の両側突出片49、49の通孔49a、49aに挿通したボルト4aをネジ棒5の係止片14の通孔14aに挿通してナット4bで締結した部位をS2としてその周りにネジ棒5を上下方向に回動自在に枢設した構成としている。
【0021】
さらに、バネ係止部材3の下端部に形成された通孔3bにはシンブル20を介して挿通されたボルト21aをナット21bで締結し、てこの作用点B1として作用させ、図2に示すようにシンブル20には吊線53の端部に形成された連結輪53aを嵌合することによって電柱50の吊線53を架設する。
【0022】
以上のように、本実施例の架線張力調整具においては、図2に示すように、架線張力調整具にバネ係止部材3の支点S1(てこの支点)を上方の電柱用バンド51の締結部2bに設け、この支点位置から垂直下方にバネ係止部材3の架線結合部B1(てこの作用点)が位置するように位置決めナット7(てこの力点)によって位置決めされたコイルバネ8の張力を調整ナット9の締付け具合によって調整することにより、既設の電柱用バンド51の締結部に結合していた吊線53の結合位置を変えることなく本実施例の架線張力調整具を取り付けることができるため、従来のように、吊線端末の再処理やケーブル接続端子55の位置変更(図6におけるストロークF及び図7におけるストロークG)などの大掛かりな作業を伴わずに施工することが可能となる。
【0023】
また、無風時において吊線53には自重による張力があり、この無風時の吊線張力では駆動しないバネ力をコイルバネ8に予め付与するように調整ナット9の締付けを調整することにより、コイルバネ8を架線初期張力に調整しておき、台風や着雪当の異常荷重が加わったとき、図3に示すように、コイルバネ8のバネ力に抗してバネ係止部材3の架線結合部B1の位置が吊線53の張力を緩和する方向に移動(ストロークE)することによって吊線張力を自動的に低減して電柱50への過負荷を軽減することができる。
【0024】
さらに、調整ナット9によるコイルバネ8の張力調整によって、電柱50の設計荷重に適合した無負荷時における架線初期張力に調整することができる。
【0025】
即ち、電柱50の設計荷重をAとし、予想し得る異常時の荷重増加(例えば台風時の風圧等)をBとし、架線初期張力をCとすると、B+Cの大きさがAの大きさを超えたとき、電柱50は折壊するおそれが生じるため、無負荷時における架線初期張力CはA−Bを超えない大きさに設定しておくことによって異常荷重に対処し、電柱50の折壊を防止することができる。
【0026】
本実施例の他の具体例としては、図4及び図5に示すように、実施例1における架線張力調整具を用いて電線62の架設に用いる吊線53を取り付けて同様の効果を得ることができる。
【0027】
そのための構成としては、上記と同様の構成による架線張力調整具のバネ係止部材3の下端部の架線結合部B1に設けられた通孔3bにボルト21aを締結することによって連結部材64を接続し、該連結部材64の先端部にボルト63aによって締結された碍子63に吊線53の端部の連結輪65aを結合して電線62を吊架すればよい。
【0028】
【発明の効果】
以上説明したように、本発明の架線張力調整具によれば、架線の張力に応じてコイルバネのバネ力に抗して回動するバネ係止部材の架線結合部の位置を吊線の張力を緩和する方向に移動することによって吊線張力を自動的に低減して電柱への過負荷を軽減することができ、電柱の保護を図ることが可能となる。
【0029】
また、本発明において、架線結合位置を既設の電柱用バンドの吊線結合位置と同様の位置にすることができるため、既設の電柱用バンドに架設していた吊線の長さを変えることなく本発明の架線張力調整具を取り付けることが可能となる。
【0030】
また、本発明において、無風時の吊線張力では駆動しないバネ力をコイルバネに予め付与するように調整ナットの締付けを調整することにより、コイルバネを架線初期張力に調整しておくことができ、台風や着雪当の異常荷重が加わったとき、コイルバネのバネ力に抗して架線結合部の位置が吊線の張力を緩和する方向に移動することによって吊線張力を 自動的に低減して電柱への過負荷を軽減することができる。
【0031】
また、本発明において、コイルバネの張力調整によって電柱の設計荷重に適合した無負荷時における架線初期張力に調整することが可能であり、電柱の設計荷重と予想し得る異常荷重を知ることによって電柱が折壊するおそれのない初期張力を設定することが可能となる。
【0032】
また、本発明によれば、一対の電柱用バンドの一方の電柱用バンドは既設の電柱用バンドをそのまま利用することができる。
【0033】
さらに、本発明において、新設の電柱に架線及び通信ケーブルの架設に用いる吊線または電線の架設に用いる吊線を施工する場合にも利用することができる。
【図面の簡単な説明】
【図1】本発明による実施例1の架線張力調整具を示す斜視図である。
【図2】本発明による実施例1の架線張力調整具の初期設定時における側面図である。
【図3】本発明による実施例1の架線張力調整具の荷重作用時における側面図である。
【図4】本発明による実施例1の架線張力調整具の他の具体例における初期設定時の側面図である。
【図5】本発明による実施例1の架線張力調整具の他の具体例における荷重作用時の側面図である。
【図6】(a) は従来の吊線架設の場合の電柱周辺の状況を示す側面図であり、(b) はこの吊線に従来の張力調整具を取り付けた状況を示す側面図である。
【図7】(a) は従来の他の吊線架設の場合の電柱周辺の状況を示す側面図であり、(b) はこの吊線に従来の張力調整具を取り付けた状況を示す側面図である。
【符号の説明】
3…バネ係止部材
5…ネジ棒
7…位置決めナット
8…コイルバネ
9…調整ナット
12…係止部
49…突出片
50…電柱
51…電柱用バンド
53…吊線
54…通信ケーブル
62…電線
63…碍子
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention adjusts the tension according to a load change when snow accretion or wind pressure acts on an overhead line provided on an electric pole such as a suspension line used for erection of a communication cable or an erection line used for erection of an electric wire. The present invention relates to an overhead wire tension adjuster configured to reduce overload on a utility pole.
[0002]
[Prior art]
As shown in FIG. 6A, a conventional method for laying a communication cable on a power pole is to fasten a power pole band 51 to an existing power pole 50 with bolts 52 and to connect a suspension wire 53 to a bolt fastening portion of the band 51. After the rings 53a are connected, the communication cable 54 is suspended from the suspension line 53 at predetermined intervals.
[0003]
When the suspension line 53 is provided in this manner, if a load is applied to the suspension line 53 or the communication cable 54 due to snowfall, strong wind, or the like, the utility pole 50 is overloaded due to the tension of the suspension line 53, so that the utility pole 50 is broken or collapsed. It leads to dangerous situations.
[0004]
For this reason, in the past, the power pole was reinforced by installing a branch line on the existing power pole, but the problem of the decrease in the space of the branch line facility due to recent land conditions, furthermore, a request for removal from the land after the branch line facility, etc. Currently, there is a new issue for branch line reinforcement equipment.
[0005]
On the other hand, if the power pole is unbranched, it is necessary to increase the strength of the power pole in order to adapt to the load change at the time of abnormalities such as strong winds and snowfall, etc. Due to the situation, there was a problem that the cost of the electric wire was increased, and furthermore, the rebuilding work was impossible depending on the location.
[0006]
As a means for solving such a problem, as shown in FIG. 6B, to provide a tension adjuster 57 in the middle of the suspension line 53 has been developed to reduce the tension acting on the suspension line 53.
[0007]
As shown in FIG. 6B, the tension adjuster 57 locks a coil spring 59 housed in a cylindrical case 58 with a lock fitting 59 a at an end of a rod 60, and extends the rod 60. The connecting portion 61 at the end and the connecting portion 62 provided at the end of the case 58 on the opposite side are connected between the suspension lines 53.
[0008]
Therefore, in order to attach the tension adjuster 57 from the cable connection box 55 using the extra length of the suspension line 53 on the utility pole 50 side, the suspension line 53 is disconnected or the tension adjuster 57 is attached to the end of the disconnected suspension line 53. A large-scale operation for moving the distance of the stroke F, such as performing a terminal process for connecting the cable connection box and changing the position of the cable connection box 55, is required.
[0009]
On the other hand, as shown in FIG. 7A, the electric wire 62 installed on the electric pole 50 has the same problem as described above. That is, when the electric wire 62 is erected on the electric pole 50, the electric pole band 51 is fastened to the existing electric pole 50 with bolts 52, and a connecting member 64 provided with an insulator 63 is connected to the bolt fastening portion of the band 51 by connecting the insulator 63 to the insulator 63. The connection ring 65a at the end of the suspension line 53 is connected. However, if a load is applied to the suspension line 53 or the electric wire 62 due to snowfall, strong wind, or the like, the utility pole 50 is overloaded by the tension of the suspension line 53. Had the problem of breaking or collapsing.
[0010]
For this reason, as shown in FIG. 7 (b), a tension adjuster 57 is provided in the middle of the hanging wire 53, but as in the above case, the hanging wire 53 is broken or the end of the broken hanging wire 53 is cut off. A large-scale operation for moving the distance of the stroke G, such as performing a terminal process for coupling the tension adjuster 57 to the connector or changing the position of the connection terminal 67, is required.
[0011]
[Problems to be solved by the invention]
The present invention has been made in view of the above circumstances, and when a communication cable or an electric wire is erected on a utility pole, it is interlocked with a change in a load acting on a stranded wire used for erection of the communication cable or a stranded wire used for erection of the electric wire. The purpose of the present invention is to provide an overhead wire tension adjuster that protects the electric pole by adjusting the overload applied to the electric pole by automatically reducing the tension of the suspension wire, and that also required the construction work of the electric pole. I do.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, an overhead wire tension adjuster according to claim 1 of the present invention comprises two substantially rectangular plates having a long side portion and a short side portion, which are separated by a predetermined width and opposed to each other. A locking portion is provided on the convex side of the top portion where the long side portion and the short side portion of the spring locking member intersect, and the concave side of the spring locking member is directed toward the utility pole, and the spring locking member is A long screw rod is inserted into the through hole at the center of the locking part, and the inner end of the screw rod is connected to the fastening part of one of the power pole bands. The coil spring is extrapolated to the threaded rod that has been extended and fixed with an adjustment nut, and a through hole formed at the end on the long side of the spring locking member is vertically moved with the fastening portion of the other telephone pole band as a fulcrum. And a through hole formed at the short side end of the spring locking member is formed at the end of the overhead wire. The engaged configuration, as well as to be attached to existing overhead line without changing the length of the overhead line which has been bridged existing utility pole band of, against the spring force of the coil spring in response to tension in the cross-line The tension of the overhead wire is automatically adjusted by changing the position of the overhead wire connecting portion of the rotating plate.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0014]
In this embodiment, the overhead wire tension adjuster is configured using a single coil spring. As shown in FIG. 1, two substantially rectangular plates 3a and 3a having a long side and a short side are provided. Are spaced apart by a predetermined width to face each other, the concave side of the plate faces the utility pole 50 side, and the locking section 12 is provided on the convex side of the top where the long side and the short side intersect. 3 is assumed. A through hole 12a is formed in the center of the locking portion 12 of the spring locking member 3, and a long screw rod 5 is inserted into the through hole 12a. A locking piece 14 having a hole 14a is provided. On the other hand, a pair of electric pole bands 51, 51 fastened at predetermined intervals at the upper and lower positions of the electric pole 50 are provided, and the through holes 14a of the locking pieces 14 are connected to the fastening portions 4a of the one electric pole band 51. Are combined. Further , the positioning nut 7 is fastened inside the locking portion 12 with respect to the screw rod 5 extending outward from the locking portion 12 of the spring locking member 3, while the positioning nut 7 is fixed to the externally extending portion of the screw rod 5. The coil spring 8 is extrapolated and fixed with the adjustment nut 9. Further, a through hole 3c is formed at an end of the spring locking member 3 on the long side of the plates 3a, 3a, and the spring locking member 3 is vertically rotatably coupled with the fastening portion 2a of the other power pole band as a fulcrum. At the same time, a through hole 3b is formed at an end on the short side of the plates 3a, 3a, and is connected to an end of the suspension line 53. With such a configuration, it is possible to attach to the existing suspension line 53 without changing the length of the suspension line 53 laid on the existing power pole band 51, and the spring of the coil spring 8 according to the tension of the suspension line 53. The tension of the overhead wire is automatically adjusted by changing the position of the overhead wire connecting portion of the spring locking member 3 that rotates against the force.
[0015]
To describe such a configuration in more detail, when this overhead wire tension adjuster is used for an existing telephone pole 50, one of the pair of telephone pole bands 51, 51 can use the existing telephone pole band 51, Another pole 51 is fastened at a predetermined interval above or below the pole 51 already fastened.
[0016]
The power pole band 51 has a configuration in which several band pieces 51a, 51a,... Corresponding to the outer diameter of the power pole 50 are fixed with bolts 51b to form one power pole band 51. , 49 are provided with bolts 2a inserted into through holes 49a, 49a and fastened with nuts 2b.
[0017]
The spring engaging member 3 of the overhead line tensioner in this embodiment, along with to face apart two plates 3a constituting the substantially V-shape having a long side and a short side portion and 3a at a predetermined width, the long sides A through hole 12a is formed at the center of the locking portion 12 provided on the convex side of the top where the portion and the short side intersect, and a through hole 3c is formed at the end of the spring locking member 3 on the long side. A through hole 3b is formed at the end on the short side .
[0018]
A long screw rod 5 is inserted into the through hole 12a of the locking portion 12 of the spring locking member 3, and a locking piece 14 having a through hole 14a is fixed to the inner end of the screw rod 5. A positioning nut 7 fastened to the inside of the locking portion 12 with respect to the screw rod 5 extending outward from the locking portion 12 and a coil spring 8 inserted into the outwardly extending portion of the screw rod 5 and the outside thereof. Is provided with an adjustment nut 9 fastened via a large-diameter washer 10, so that the positioning nut 7 acts as a leverage point, and the spring force of the coil spring 8 positioned by the positioning nut 7 is adjusted. Adjustment is made according to the degree of tightening.
[0019]
When such a spring locking member 3 is attached to one power pole band 51 (the upper power pole band 51 in FIG. 1), in order to define the gap width between the both side plates 3a, 3a of the spring locking member 3. The bolt 2a is inserted through the through holes 49a, 49a of the projecting pieces 49, 49 on both sides of the pole 51 via the sleeve 15, and the portion fastened by the nut 2b acts as a lever S1, and a spring is locked therearound. The member 3 is provided so as to be rotatable vertically.
[0020]
A locking piece 14 is fixed to the inner end of the screw rod 5 inserted into the locking portion 12 of the spring locking member 3, and another power pole band 51 (in FIG. 1, a lower power pole band 51). ), The bolt 4a inserted into the through holes 49a of the projecting pieces 49 on both sides, 49a is inserted into the through hole 14a of the locking piece 14 of the screw rod 5 and the part fastened by the nut 4b is defined as S2. 5 is provided so as to be rotatable vertically.
[0021]
Further, a bolt 21a inserted through a thimble 20 is fastened to a through hole 3b formed at a lower end portion of the spring locking member 3 with a nut 21b to act as a lever action point B1, as shown in FIG. The connecting wire 53a formed at the end of the hanging wire 53 is fitted to the thimble 20, so that the hanging wire 53 of the utility pole 50 is installed.
[0022]
As described above, in the overhead wire tensioning device of the present embodiment, as shown in FIG. 2, the fastening of the contact wire tensioner the spring engaging member 3 of the fulcrum S1 is (leverage points) over the utility pole band 51 provided part 2b, and the tension of the coil spring 8 which is positioned by a positioning nut 7 (this force point Te) as overhead lines coupling portion B1 of the spring engaging member 3 vertically downward from the support position (leverage points) is located By adjusting the tension of the adjusting nut 9, the overhead wire tension adjusting tool of the present embodiment can be attached without changing the connecting position of the suspension wire 53 connected to the fastening portion of the existing power pole band 51. as it is conventional, to construction without a large-scale work such as (stroke G at the stroke F and 7 in FIG. 6) repositioning reprocessing or cable connecting terminals 55 of the suspension wire terminals It becomes possible.
[0023]
Further, the suspension wire 53 has a tension due to its own weight when there is no wind, and the tension of the adjusting nut 9 is adjusted so that a spring force which is not driven by the suspension wire tension when there is no wind is applied to the coil spring 8 in advance. When the tension is adjusted to the initial tension and an abnormal load such as a typhoon or a snowfall is applied, the position of the overhead wire connecting portion B1 of the spring locking member 3 is adjusted against the spring force of the coil spring 8 as shown in FIG. By moving (stroke E) in the direction in which the tension of the suspension line 53 is reduced, the suspension line tension is automatically reduced, and the overload on the utility pole 50 can be reduced.
[0024]
Further, by adjusting the tension of the coil spring 8 with the adjusting nut 9, it is possible to adjust the initial tension of the overhead wire at the time of no load, which is suitable for the design load of the electric pole 50.
[0025]
That is, assuming that the design load of the utility pole 50 is A, a predictable load increase at the time of abnormality (for example, wind pressure during a typhoon) is B, and the overhead wire initial tension is C, the size of B + C exceeds the size of A. When the power pole 50 is broken, the overhead wire initial tension C at no load is set to a value not exceeding AB so as to cope with the abnormal load, and the power pole 50 is broken. Can be prevented.
[0026]
As another specific example of the present embodiment, as shown in FIGS. 4 and 5, it is possible to obtain the same effect by attaching the suspension wire 53 used for erection of the electric wire 62 using the overhead wire tension adjuster in the first embodiment. it can.
[0027]
For this purpose, the connecting member 64 is connected by fastening a bolt 21a to a through hole 3b provided at a lower end of the overhead wire connecting portion B1 of the spring locking member 3 of the overhead wire tension adjuster having the same configuration as described above. Then, the electric wire 62 may be suspended by connecting the coupling ring 65a at the end of the suspension wire 53 to the insulator 63 fastened to the distal end of the coupling member 64 by the bolt 63a.
[0028]
【The invention's effect】
As described above, according to the overhead wire tension adjuster of the present invention, the tension of the suspension wire is reduced by changing the position of the overhead wire connecting portion of the spring locking member that rotates against the spring force of the coil spring in accordance with the tension of the overhead wire. By moving in the direction in which the electric pole is moved, the overload on the electric pole can be reduced by automatically reducing the suspension wire tension, and the electric pole can be protected.
[0029]
Further, in the present invention, since the overhead wire connection position can be set to the same position as the existing wire connection position of the power pole band, the present invention can be performed without changing the length of the suspension wire installed on the existing power pole band. Can be attached.
[0030]
Further, in the present invention, by adjusting the tightening of the adjustment nut so as to apply a spring force that is not driven by the suspension wire tension in a windless state to the coil spring in advance, the coil spring can be adjusted to the initial tension of the overhead wire, and the typhoon and the like can be adjusted. When an abnormal load such as a snow cover is applied, the position of the overhead wire joint moves in the direction to reduce the tension of the suspension line against the spring force of the coil spring, thereby automatically reducing the tension of the suspension line and overloading the utility pole. The load can be reduced.
[0031]
Further, in the present invention, it is possible to adjust the initial tension of the overhead wire at the time of no load adapted to the design load of the utility pole by adjusting the tension of the coil spring, and the utility pole can be adjusted by knowing the design load of the utility pole and the abnormal load that can be expected. It is possible to set an initial tension that does not cause breakage.
[0032]
Further, according to the present invention, the existing power pole band can be used as it is as one power pole band of the pair of power pole bands.
[0033]
Further, in the present invention, the present invention can also be applied to a case where a suspension wire used for erection of an overhead wire and a communication cable or a suspension wire used for erection of an electric wire is constructed on a newly installed utility pole .
[Brief description of the drawings]
FIG. 1 is a perspective view showing an overhead wire tension adjuster according to a first embodiment of the present invention.
FIG. 2 is a side view of the overhead wire tension adjuster according to the first embodiment of the present invention at the time of initial setting.
FIG. 3 is a side view of the overhead wire tension adjuster according to the first embodiment of the present invention when a load is applied.
FIG. 4 is a side view of another specific example of the overhead wire tension adjuster according to the first embodiment of the present invention at the time of initial setting.
FIG. 5 is a side view of another embodiment of the overhead wire tension adjuster according to the present invention when a load is applied.
FIG. 6 (a) is a side view showing a situation around a power pole in the case of a conventional suspension line erection, and FIG. 6 (b) is a side view showing a situation in which a conventional tension adjuster is attached to this suspension line.
FIG. 7 (a) is a side view showing a situation around a utility pole in the case of another conventional suspension line erection, and FIG. 7 (b) is a side view showing a situation in which a conventional tension adjuster is attached to this suspension line. .
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 3 ... Spring locking member 5 ... Screw rod 7 ... Positioning nut 8 ... Coil spring 9 ... Adjusting nut 12 ... Locking part 49 ... Projection piece 50 ... Electric pole 51 ... Electric pole band 53 ... Hanging wire 54 ... Communication cable 62 ... Electric wire 63 ... insulator

Claims (1)

長辺部と短辺部を有する略く字形をなす2枚のプレートを所定幅で離間して対向させて成るバネ係止部材の前記長辺部と短辺部との交わる頂部の凸側に係止部が設けられ、前記バネ係止部材の凹側が電柱側に向けられると共に、前記バネ係止部材の係止部の中央の通孔には長尺のネジ棒が挿通され、該ネジ棒の内端が一方の電柱用バンドの締結部に結合され、前記バネ係止部材の係止部の外方へ伸長したネジ棒にコイルバネを外挿して調整ナットで固定し、さらに前記バネ係止部材の長辺部側の端部に形成された通孔が他方の電柱用バンドの締結部を支点として上下方向に回動自在に結合されると共に、該バネ係止部材の短辺部側の端部に形成された通孔が架線の端部に結合された構成により、既設の電柱用バンドに架設していた架線の長さを変えることなく既設の架線に取付け可能にすると共に、該架線の張力に応じて前記コイルバネのバネ力に抗して回動する前記プレートの架線結合部の位置を変動することにより、該架線の張力を自動的に調整するようにしたことを特徴とする架線張力調整具。 On the convex side of the top where the long side and the short side intersect, the spring locking member is formed by facing and facing two substantially rectangular plates having a long side and a short side at a predetermined width. A locking portion is provided, the concave side of the spring locking member is directed toward the utility pole, and a long screw rod is inserted into a through hole at the center of the locking portion of the spring locking member. The inner end of is connected to the fastening portion of one of the power pole bands, a coil spring is externally inserted into a threaded rod extending outward from the locking portion of the spring locking member, and is fixed with an adjustment nut. A through hole formed at an end on the long side of the member is rotatably coupled in the vertical direction with the fastening portion of the other power pole band as a fulcrum, and a through hole on the short side of the spring locking member. The length of the overhead wire that was installed on the existing telephone pole band by the configuration in which the through hole formed at the end was connected to the end of the overhead wire Thereby enabling attachment to an existing overhead line without changing, by varying the position of the overhead wire coupling portion of the plate to be rotated against the spring force of the coil spring in accordance with the tension of the cross line, the tension of the cross line A wire tension adjuster characterized in that the tension is automatically adjusted.
JP2001095185A 2001-03-29 2001-03-29 Wire tension adjuster Expired - Fee Related JP3590890B2 (en)

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