JP5439229B2 - Guard cable - Google Patents

Guard cable Download PDF

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JP5439229B2
JP5439229B2 JP2010048780A JP2010048780A JP5439229B2 JP 5439229 B2 JP5439229 B2 JP 5439229B2 JP 2010048780 A JP2010048780 A JP 2010048780A JP 2010048780 A JP2010048780 A JP 2010048780A JP 5439229 B2 JP5439229 B2 JP 5439229B2
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cable
column
columns
support column
vehicle
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JP2011184878A (en
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直 岡本
伯万 大森
慶太 山田
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SHIKO KENZAI LTD.
Tokyo Rope Manufacturing Co Ltd
JFE Metal Products and Engineering Inc
Nippon Steel Metal Products Co Ltd
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SHIKO KENZAI LTD.
Tokyo Rope Manufacturing Co Ltd
JFE Metal Products and Engineering Inc
Nippon Steel Metal Products Co Ltd
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Description

この発明は、一定の間隔をあけて立設した支柱間に、同支柱の上下方向に間隔をあけて複数本のケーブルを架設して成るガードケーブルの技術分野に属し、更に云うと、車両衝突時に支柱を車両の進行方向へ効果的に倒して乗員の安全を確保するガードケーブルに関する。   The present invention belongs to the technical field of a guard cable in which a plurality of cables are erected between struts erected at a certain interval and spaced in the vertical direction of the struts. The present invention relates to a guard cable that sometimes effectively tilts a support column in a traveling direction of a vehicle to ensure the safety of an occupant.

従来、一定の間隔をあけて立設した支柱間に、同支柱の上下方向に間隔をあけて複数本にケーブルを架設して成る道路防護柵が、主に中央分離帯や路肩に設置されている。その目的は、進行方向を誤った車両が路外、対向車線または歩道などに逸脱するのを防ぐと共に、車両乗員へのダメージ及び車両の損傷を最小限にとどめて、車両の進行方向を正常な方向に復元させることである。   Conventionally, road protection fences, which consist of multiple cables erected between columns that are erected at regular intervals, with vertical spacing between the columns, are mainly installed on median strips and shoulders. Yes. Its purpose is to prevent a vehicle with the wrong direction of travel from deviating outside the road, oncoming lanes, or sidewalks, and to minimize damage to the vehicle occupant and damage to the vehicle so that the vehicle travels normally. To restore direction.

こうした、ガードケーブルは、下記の特許文献1〜3に記載されて公知である。
特許文献1及び2は地中に植設した複数の円形型の支柱にケーブルをボルト接合により緊結して架設する技術であり、特許文献3は、やはり地中に植設した複数の角形の支柱にケーブルをボルト接合により緊結して架設する技術が記載されている。これらの支柱は何れも地中深くに植設されて、車両の衝撃に耐えて転倒する虞を最小限に止めた構成とされている。
Such guard cables are described in Patent Documents 1 to 3 below and are known.
Patent Documents 1 and 2 are technologies in which a cable is tightly coupled to a plurality of circular pillars planted in the ground by bolting, and Patent Document 3 discloses a plurality of square pillars also planted in the ground. Describes a technique in which a cable is tightly connected by bolt joining. These struts are all planted deep in the ground to minimize the risk of falling over the impact of a vehicle.

実開昭38−13747号公報Japanese Utility Model Publication No. 38-13747 実開昭63−130518号公報Japanese Utility Model Publication No. 63-130518 実開昭37−27141号公報Japanese Utility Model Publication No. 37-27141

上記した特許文献1〜3の支柱は、地中へ植設されて車両の衝突荷重に耐え得る強度を期待できる。しかし、その反面、衝突荷重の殆どを車両側が吸収することになり、車両乗員に甚大な危険が及ぶだけでなく、衝突時に支柱が反対車線側へ折れ曲がって二次的な被害の要因となる虞もある。
また、ガードケーブルに衝突事故が発生するなど破損した支柱を取り替える場合、支柱は地中深くに埋め込まれており、更に支柱にケーブルが緊結されているため、その取り替え作業は非常に面倒で時間が掛かる。
The struts of Patent Documents 1 to 3 described above can be expected to have a strength that can be implanted into the ground and withstand the collision load of the vehicle. However, on the other hand, most of the collision load will be absorbed by the vehicle side, which will not only pose a tremendous danger to the vehicle occupant, but also the pillar may bend to the opposite lane side at the time of collision and cause secondary damage There is also.
Also, when replacing a damaged column such as a collision accident in the guard cable, the column is buried deep in the ground, and the cable is tightly connected to the column. It takes.

特に、暫定二車線道路などにおいて、中央分離帯としてガードケーブルを設置している場合、一車線上で事故があると直ぐに渋滞を引き起こしてしまう。そのため、即座に支柱を撤去して対面交通にするなどの対応が求められるが、上記のように支柱の撤去は面倒で時間が掛かるため、交通状況に多大な悪影響を及ぼしてしまうことが指摘されている。したがって、支柱を容易に取り外し可能なカードケーブルが所望されているが、未だそのような技術は見聞きしないし開示もない。   In particular, when a guard cable is installed as a median strip on a provisional two-lane road or the like, a traffic jam occurs immediately if an accident occurs on one lane. For this reason, it is necessary to take measures such as removing the struts immediately to make it face-to-face traffic, but it is pointed out that removal of the struts is troublesome and time-consuming as described above, and it has a great adverse effect on the traffic situation. ing. Therefore, there is a need for a card cable in which the post can be easily removed, but such technology has not yet been seen or disclosed.

本発明の目的は、上記の課題点を解決することであり、車両衝突時に支柱を進行方向へ積極的に倒して支柱及び車両が反対車線へ飛び出すことを防止でき、乗員の安全を確保でき、且つ支柱を容易に抜き挿し可能な構成として、取り替え作業を簡便にすると共に事故時にも即座に対応可能なガードケーブルを提供することにある。   The object of the present invention is to solve the above-mentioned problems, and can prevent the strut and the vehicle from jumping out to the opposite lane by actively tilting the strut in the traveling direction at the time of a vehicle collision, and can ensure the safety of the occupant. In addition, it is an object of the present invention to provide a guard cable that can be easily inserted and removed, and that can be easily replaced and can immediately respond to an accident.

上記課題を解決するための手段として、請求項1に記載した発明に係るガードケーブルは、
一定間隔をあけて立設した支柱間に、同支柱の上下方向に間隔をあけて複数本のケーブルを架設して成るガードケーブルであって、
前記支柱は、平面視が長方形の角形鋼管とされ、同支柱は平面視で長辺側となる側面が道路の延長方向に相対峙する配置とされ、地中へ予め埋設された鞘管の中空部内へ抜き挿し可能に差し込まれて立設されていること、
前記支柱の平面視で長辺側となる二側面の上部には、上端部を開口して略下方へ切り欠いたスリットがそれぞれ設けられ、
前記ケーブルは、前記支柱のスリットを貫通させて支柱間に架設されている
ことを特徴とする。
As means for solving the above-mentioned problems, a guard cable according to the invention described in claim 1 is:
A guard cable in which a plurality of cables are erected between the struts erected at regular intervals with a space in the vertical direction of the struts,
The support column is a rectangular steel pipe having a rectangular shape in plan view, and the support column is arranged so that the side surface on the long side in the plan view is opposed to the extending direction of the road, and the hollow of a sheath tube embedded in the ground in advance. It is erected so that it can be inserted into and removed from
In the upper part of the two side surfaces that are the long side in a plan view of the support column, slits that are open at the upper end and cut substantially downward are provided, respectively.
The cable is characterized in that it is installed between struts through the slits of the struts.

請求項2記載の発明は、請求項1に記載したガードケーブルにおいて、
ケーブルは、前記支柱のスリットを貫通させて支柱間に架設されて、支柱内に挿入したスペーサーにより上下方向の間隔が保持されていることを特徴とする。
The invention according to claim 2 is the guard cable according to claim 1,
The cable is characterized in that the cable is provided between the columns by passing through the slits of the columns and the vertical distance is maintained by a spacer inserted in the columns.

請求項1及び2に記載したガードケーブルは、以下の効果を奏する。
本発明のガードケーブルの支柱には平面視の縦横比が異なる長方形の角形鋼管を用いた。したがって、平面視で長辺側となる側面は、短辺側の側面に対し弱軸側となる。
この支柱を、前記弱軸側を道路の延長方向に対して相対峙する配置とし、地中へ予め埋設された鞘管の中空部内へ抜き挿し可能に差し込んで立設している。
したがって、車両が前記ガードケーブルの支柱へ衝突する際、支柱の弱軸側に当たり、同支柱が道路の延長方向へ積極的に倒れる。一般的に直進走行中の車両は大型車では15°以内、小型車では20°以内の角度でガードケーブルへ衝突することが多く確認されており、支柱の弱軸側を道路の延長方向に相対峙して配置しておけば、必然的に支柱の弱軸側へ衝突することになる。そして、支柱の倒れる方向は、支柱の弱軸側が道路の延長方向に相対峙しているので、車両の衝突方向には倒れずに道路の延長方向(進行方向側)に倒れるのである。
The guard cable described in claims 1 and 2 has the following effects.
Rectangular guard steel pipes having different aspect ratios in plan view were used for the guard cable posts of the present invention. Therefore, the side surface on the long side in plan view is on the weak axis side with respect to the side surface on the short side.
The struts are erected so that the weak shaft side is relatively inclined with respect to the road extending direction, and are detachably inserted into a hollow portion of a sheath pipe embedded in the ground in advance.
Therefore, when the vehicle collides with the guard cable column, the vehicle hits the weak axis side of the column and the column actively falls down in the road extending direction. In general, it has been confirmed that vehicles traveling straight ahead collide with the guard cable at angles within 15 ° for large vehicles and within 20 ° for small vehicles. If it is arranged, it will inevitably collide with the weak axis side of the column. The direction in which the column falls is that the weak axis side of the column leans relative to the road extension direction, so that the column falls in the road extension direction (traveling direction side) without falling in the vehicle collision direction.

上記のように支柱が積極的に道路の延長方向へ倒れるので、支柱が折れ曲がって反対車線側へ飛び出し、反対車線を走行する車両に二次的被害が生じることを防止できる。のみならず、衝突時の運動エネルギーが支柱とケーブルとで効果的に吸収して、車両への損傷を最小限に止め乗員の安全を守ることができる。   As described above, since the struts positively fall in the road extending direction, it is possible to prevent the struts from bending and jumping out to the opposite lane side, and causing secondary damage to the vehicle traveling in the opposite lane. In addition, the kinetic energy at the time of collision can be effectively absorbed by the struts and cables, minimizing damage to the vehicle and protecting passenger safety.

前記支柱の下端が地中へ埋設された鞘管の中空部内に抜き挿し可能に差し入れられていること、また、支柱の先端に架設されるケーブルが抜き挿し可能で上部を開口したスリット内に差し入れる構成としたので、支柱が破損した場合でも、ケーブル及び支柱を単に順に引き上げるだけで容易に引き抜け、取り替え作業の効率を飛躍的に向上できる。のみならず、走行車線一車線と対向車線一車線からなる二車線道路の中央分離帯に設置されている場合においては、事故時に専門的な技術者がいなくても、誰もが即座に支柱を撤去でき、対面交通などの交通渋滞の緩和を迅速に行える。特に、ケーブルが上記スリットから容易に抜けるので、車両が支柱へ衝突してもケーブルの高さは前後の支柱により保持される。従って、支柱が転倒しても車両の反対車線側への飛び出しを同ケーブルで確実に防止できる。   The lower end of the column is inserted into the hollow portion of the sheath tube embedded in the ground so that it can be inserted and removed, and the cable installed on the tip of the column can be inserted and removed and inserted into the slit opened at the top. Therefore, even if the support column is broken, the cable and the support column can be easily pulled out by simply pulling them up in order, and the efficiency of the replacement work can be dramatically improved. In addition, when installed in the median strip of a two-lane road consisting of one lane and one lane on the road, everyone can immediately support the column even if there is no specialized engineer at the time of the accident. It can be removed and traffic congestion such as face-to-face traffic can be eased quickly. In particular, since the cable can be easily pulled out from the slit, the height of the cable is held by the front and rear columns even when the vehicle collides with the column. Therefore, even if the column falls down, it is possible to reliably prevent the vehicle from jumping out to the opposite lane side.

本発明が実施される道路の中央分離帯に設けられたガードケーブルを示した全体斜視図である。It is the whole perspective view showing the guard cable provided in the median strip of the road where the present invention is carried out. 本発明のガードケーブルの立面図である。It is an elevational view of the guard cable of the present invention. 上記ガードケーブルの平面図である。It is a top view of the said guard cable. 支柱の拡大側面図である。It is an enlarged side view of a support | pillar. 図4に示した支柱のI−I矢視断面図である。It is the II arrow directional cross-sectional view of the support | pillar shown in FIG. Aは二つの屈曲点を有する屈曲型のスリットの一例を示した拡大側面図である。Bは二つの変曲点を有する湾曲型のスリットの一例を示した拡大側面図である。Cは一つの屈曲点を有する屈曲型のスリットの一例を示した拡大側面図である。Dは一つの変曲点を有する湾曲型のスリットの一例を示した拡大側面図である。Eは屈曲型と湾曲型を併用させたスリットの一例を示した拡大側面図である。A is an enlarged side view showing an example of a bent slit having two bending points. B is an enlarged side view showing an example of a curved slit having two inflection points. C is an enlarged side view showing an example of a bending-type slit having one bending point. D is an enlarged side view showing an example of a curved slit having one inflection point. E is an enlarged side view showing an example of a slit in which a bending type and a bending type are used together. 支柱へケーブルを架設する手順の概要を示した拡大斜視図である。It is the expansion perspective view which showed the outline | summary of the procedure which constructs a cable to a support | pillar.

本発明は、一定の間隔をあけて立設した支柱3間に、同支柱3の上下方向に間隔をあけて複数本にケーブル2を架設して成るガードケーブルである。特に、高速道路などに設けられている走行車線一車線と対向車線一車線からなる二車線道路の中央分離帯として好適に使用される。
前記支柱3は、縦横比が異なることで弱軸側31と強軸側32が構成される平面視が長方形の角形鋼管とされ、同支柱3の弱軸側31が車両の進行方向に相対峙する配置で、地中へ予め埋設された鞘管5の中空部内へ抜き挿し可能に差し込まれて立設される。
The present invention is a guard cable in which a plurality of cables 2 are installed between columns 3 standing upright at regular intervals and spaced in the vertical direction of the columns 3. In particular, it is preferably used as a central separation zone of a two-lane road composed of a traveling lane and an opposite lane provided on an expressway or the like.
The column 3 is a rectangular steel pipe having a rectangular shape in plan view, in which the weak shaft side 31 and the strong shaft side 32 are configured by different aspect ratios, and the weak shaft side 31 of the column 3 is relative to the traveling direction of the vehicle. With this arrangement, it is erected so that it can be inserted into and removed from the hollow portion of the sheath tube 5 embedded in advance in the ground.

同支柱3の平面視で長辺側となる二側面の上部には、上端部を開口して略下方へ切り欠いたスリット6が上下方向にそれぞれ設けられ、それぞれのスリット6は一方の側面方向から見ると左右対称形状とされている。
前記ケーブル2は、前記支柱3のスリット6を貫通させて支柱3間に架設され、支柱3内に挿入したスペーサー7により上下方向の間隔が保持されている。
In the upper part of the two side surfaces which are the long side in the plan view of the support column 3, slits 6 which are opened at the upper end and are cut out substantially downward are respectively provided in the vertical direction. From the perspective, the shape is symmetrical.
The cable 2 is installed between the support columns 3 through the slits 6 of the support columns 3, and a vertical distance is maintained by a spacer 7 inserted into the support column 3.

以下に、本発明を図示した実施例に基づいて説明する。
本発明のガードケーブル1は、図示例に示すように、高速道路などに設けられている暫定二車線道路の中央分離帯として好適に実施される。勿論、この限りではなく、道路の路肩などにも同様の構成で実施することができる。
Hereinafter, the present invention will be described based on illustrated embodiments.
As shown in the illustrated example, the guard cable 1 of the present invention is suitably implemented as a central separation band of a provisional two-lane road provided on a highway or the like. Of course, the present invention is not limited to this, and the present invention can be implemented with the same configuration on the shoulder of a road.

図1〜図3には、道路の中央分離帯の箇所に約2mの間隔を置いて立設した支柱3の間に、上下方向に間隔をあけて3本のケーブル2を架設して構築したガードケーブル1を示した。
前記支柱3は、縦横比が異なる平面視が長方形の角形鋼管である(図5、図7参照)。したがって、同支柱3は、平面視の長辺側が短辺側に対して弱軸側31となり、前記短辺側が長辺側に対して強軸側32を有する構成となる。前記弱軸側31と強軸側32の寸法は、例えば100×50mmであり、前記弱軸側31は衝突荷重に対して積極的に変形する性質を発揮する。
In FIGS. 1 to 3, three cables 2 are erected between the pillars 3 erected at an interval of about 2 m at the location of the median strip of the road with a space in the vertical direction. A guard cable 1 is shown.
The column 3 is a rectangular steel pipe having a rectangular aspect in plan view with different aspect ratios (see FIGS. 5 and 7). Therefore, the column 3 has a configuration in which the long side in plan view is the weak axis side 31 with respect to the short side, and the short side has the strong axis side 32 with respect to the long side. The dimension of the weak shaft side 31 and the strong shaft side 32 is, for example, 100 × 50 mm, and the weak shaft side 31 exhibits a property of positively deforming against a collision load.

上記構成の角管支柱3を、前記弱軸側31が車両の進行方向R、Lに相対峙する配置で、地中へ予め埋設された鞘管5の中空部内へ抜き挿し可能に差し込んで立設されている。 一般的に走行中の車両は大型車では15°以内、小型車では20°以内の角度でガードケーブル1へ衝突することが多く確認されており、上記のように支柱3の弱軸側31が道路の延長方向に対して相対峙していれば、車両は必然的に支柱3の弱軸側31へ衝突する。すると、支柱3は確実に道路の延長方向R(対向車が衝突した場合はL)へ倒れて、車線上に飛び出る虞を緩和できる。   The square tube support 3 having the above-described structure is detachably inserted into the hollow portion of the sheath tube 5 embedded in advance in the ground in such a manner that the weak shaft side 31 is opposed to the traveling directions R and L of the vehicle. It is installed. In general, it is confirmed that a traveling vehicle often collides with the guard cable 1 at an angle within 15 ° for a large vehicle and within 20 ° for a small vehicle. The vehicle necessarily collides with the weak shaft side 31 of the support column 3 if the vehicle is relatively lean with respect to the extending direction. Then, the support column 3 can surely fall in the road extending direction R (L when the oncoming vehicle collides), and can alleviate the possibility of jumping out onto the lane.

前記鞘管5は、特に図4及び図7に示すように、支柱3の下端部をその中空部内へ挿入可能な縦横比を有し、高さは例えば約800mmとする管スリーブ5であり、地中レベルと鞘管5の上面とが略一致するように埋設されている。
前記鞘管5の両側面(強軸側面)には、その一部が切り込まれて内方へ押し込んで形成された開口部50が設けられている。この開口部50は、支柱3を伝って鞘管5内に侵入する水滴を排出する機能を発揮するほか、支柱3の位置決めストッパとしても機能する。
The sheath tube 5 is a tube sleeve 5 having an aspect ratio in which the lower end portion of the support column 3 can be inserted into the hollow portion and having a height of about 800 mm, for example, as shown in FIGS. 4 and 7. It is embed | buried so that the underground level and the upper surface of the sheath pipe 5 may correspond substantially.
On both side surfaces (strong-axis side surfaces) of the sheath tube 5, openings 50 formed by partially cutting and pushing inwardly are provided. The opening 50 exhibits a function of discharging water droplets entering the sheath tube 5 through the support 3 and also functions as a positioning stopper for the support 3.

即ち、図4に示すとおり、その両側面の開口部50(位置決めストッパ50)は、形成時に鞘管5の一部を切り込んで内方へ押し込む際、アルミ缶のプルダブを空けた時の如くに内方へ傾斜を付けたハの字状に形成されている。そのため、前記押し込まれた部分50aが支柱3の下端を支持し、同支柱3の位置決めを行うのである。したがって、開口部50が設けられる深さ位置は、支柱3が軽荷重で倒れない深さ位置に設ける必要がある。本実施例の場合、支柱3の高さが800mmとすると、その深さは400mm程度である。
上記のように支柱3は、鞘管5とボルトやフックその他の機械的取付具を使用せずに容易に抜き挿し可能に位置決めされている。
前記支柱3の位置決め方法は、図示した形態に限らず通常実施されている、機械的取付具を使用しない構成で実施できる。例えば、鞘管5の中空部内の適切な深さ位置に、両側面から内方へ突出する台座を設けて支柱3の下端を支持できる。
That is, as shown in FIG. 4, the openings 50 (positioning stoppers 50) on both side surfaces of the aluminum cans are cut when part of the sheath tube 5 is cut and pushed inward, as when an aluminum can pull-up is opened. It is formed in a square shape with an inward slope. Therefore, the pushed-in portion 50a supports the lower end of the support column 3 and positions the support column 3. Therefore, the depth position where the opening 50 is provided needs to be provided at a depth position where the support column 3 does not fall down with a light load. In the case of the present embodiment, when the height of the column 3 is 800 mm, the depth is about 400 mm.
As described above, the support column 3 is positioned so that it can be easily inserted and removed without using the sheath tube 5 and bolts, hooks, or other mechanical attachments.
The method for positioning the support column 3 is not limited to the illustrated form, and can be implemented by a configuration that does not use a mechanical fixture, which is normally performed. For example, a pedestal that protrudes inwardly from both side surfaces can be provided at an appropriate depth position in the hollow portion of the sheath tube 5 to support the lower end of the column 3.

更に、前記支柱3の上端部の弱軸側31、31の上端部には、前記3本のケーブル2…を抜き挿し可能に上部を開口して下方へ切り欠いたスリット6が形成され、ケーブル2は前記スリット6、6を貫通する様態で架設される。このスリット6は、単に下方へ同一幅で切り欠いた形状で実施することができるが(図示省略)、上下方向に屈曲又は湾曲する形状に切り欠いて実施することが好ましい。
上記屈曲又は湾曲する形状のスリット6について、図6A〜Dに示した。図6Aは、二つの屈曲点を有する屈曲形状、図6Bには、二つの変曲点を有する湾曲形状、図6Cは一つの屈曲点を有する屈曲形状、図6Dには、一つの変曲点を有する湾曲形状とするスリット6a〜6dをそれぞれ示した。
Further, slits 6 are formed at the upper ends of the weak shafts 31 and 31 at the upper ends of the columns 3 so that the three cables 2... 2 is constructed in such a manner as to penetrate the slits 6 and 6. The slit 6 can be implemented simply in a shape that is cut downward with the same width (not shown), but is preferably implemented by cutting it into a shape that is bent or curved in the vertical direction.
The slit 6 having the bent or curved shape is shown in FIGS. 6A is a bent shape having two inflection points, FIG. 6B is a curved shape having two inflection points, FIG. 6C is a bent shape having one inflection point, and FIG. 6D is one inflection point. Each of the slits 6a to 6d having a curved shape is shown.

上記各スリット6a〜dは、一方の弱軸側31方向から見ると左右対称になる形状(両弱軸側31、31に正対する方向に見ると同一形状)として、両スリット6、6内の貫通する上下の空き幅に変化を持たせている。前記ケーブル2が保持される箇所の空き幅W1は、最大幅とされている。また、両スリット6、6の形状のそれぞれの屈曲点(変曲点)の空き幅W2は、最少幅である。前記空き幅W2は、ケーブル2が抜き差し可能な最少幅である。
したがって、車両が支柱3の弱軸側31へ衝突して同支柱3が倒れることに伴い、各ケーブル2…は、スリット6、6の側面の形状と上下方向の幅の変化とにより、水平方向の摩擦抵抗を受けながら、確実に一本ずつ順に抜け、ケーブル2と支柱3とで衝突荷重を効果的に吸収することができる。前記スリット6の形状には、他の効果もある。前記支柱3は鞘管5により抜き挿し可能に差し込まれているため鞘管5との間に隙間が生じている。よって、支柱3に車両が衝突すると前記隙間の分だけ強軸側32へ傾いてしまう性質がある。前記スリット6は、上記のように屈曲及び/又は湾曲形状として上下方向の幅に変化を設けているので、支柱3の強軸側32への傾きの程度ではスリット6の側面の摩擦抵抗により、ケーブル2…がスリット6内から安易に抜けてしまうことはない。つまり、スリット6の形状は、ケーブル2が支柱3の転倒以外は抜けない構成となっている。したがって、車両衝突により支柱3が強軸側32へ隙間分だけ傾いても、ケーブル2…の高さをしかるべき位置に保持して、ケーブル2が大きく撓むことが無く、車両が反対車線側へ飛び出すことを可及的に防止できるのである。
Each of the slits 6a to 6d has a symmetrical shape when viewed from the direction of one weak axis 31 (the same shape when viewed from the direction facing the both weak axes 31 and 31). Changes are made in the upper and lower vacant widths. The vacant width W1 where the cable 2 is held is the maximum width. In addition, the vacant width W2 of each bending point (inflection point) of the shapes of both slits 6 and 6 is the minimum width. The empty width W2 is the minimum width that allows the cable 2 to be inserted and removed.
Therefore, as the vehicle collides with the weak shaft side 31 of the support column 3 and the support column 3 falls down, each cable 2... Has a horizontal direction due to the shape of the side surfaces of the slits 6 and 6 and the change in the vertical width. While receiving the frictional resistance, the cable 2 and the support column 3 can effectively absorb the collision load one by one. The shape of the slit 6 has other effects. Since the column 3 is inserted by the sheath tube 5 so that it can be inserted and removed, a gap is formed between the support column 3 and the sheath tube 5. Therefore, when the vehicle collides with the support column 3, there is a property that the vehicle is inclined toward the strong shaft side 32 by the gap. Since the slit 6 is provided with a change in the vertical width as a bent and / or curved shape as described above, due to the frictional resistance of the side surface of the slit 6 in the degree of inclination to the strong shaft side 32 of the support column 3, The cables 2 are not easily removed from the slit 6. In other words, the shape of the slit 6 is configured such that the cable 2 cannot be pulled out except for the fall of the support column 3. Therefore, even if the column 3 is tilted toward the strong shaft side 32 by a vehicle collision, the height of the cables 2 is held at an appropriate position, the cable 2 is not greatly bent, and the vehicle is on the opposite lane side. Can be prevented as much as possible.

上記スリット6の形状はこの限りではない。湾曲形状は屈曲形状に比してケーブル2が受ける摩擦抵抗が低い。上記の点を踏まえ、図6Eに示すように、上記二種類を併用したスリットeとすることもできる。例えば、スリット6eの上部を摩擦抵抗の高い屈曲型、下部を摩擦抵抗の低い湾曲型として、効果的に衝突荷重を吸収させる構成で実施することもできる。
また、空き幅W2は、支柱をよじることでケーブル2をスリット6内に抜き差し可能な程度の幅があればよく、ケーブル2の直径よりも狭くてもよい。
The shape of the slit 6 is not limited to this. The curved shape has a lower frictional resistance that the cable 2 receives than the bent shape. In consideration of the above points, as shown in FIG. For example, the slit 6e can be implemented with a configuration in which the upper part of the slit 6e is a bent type having a high frictional resistance and the lower part is a curved type having a low frictional resistance to effectively absorb a collision load.
Further, the vacant width W <b> 2 only needs to have a width that allows the cable 2 to be inserted into and removed from the slit 6 by twisting the support, and may be narrower than the diameter of the cable 2.

ここで、図4〜図7から支柱3の前記スリット6、6内へケーブル2…を架設する手順を説明する。
先ず、スリット6、6内へ第一ケーブル2aが上方から挿入される。そのあと、支柱3の中空部内へスペーサー7aが挿入され同ケーブル2の上面に載置される。このスペーサー7は、各ケーブル2…の間隔を保持するために介在されるもので、図5の平面図に示すように、支柱3の中空形状より少しだけ小形に形成された樹脂製のブロックである。複数本のケーブル2はこのスペーサー7によりスリット6内において鉛直方向の同軸上で且つ支柱の鉛直方向の中心軸に交わるように架設される。
Here, a procedure for laying the cables 2 into the slits 6 and 6 of the column 3 will be described with reference to FIGS.
First, the first cable 2a is inserted into the slits 6 and 6 from above. Thereafter, the spacer 7 a is inserted into the hollow portion of the support column 3 and placed on the upper surface of the cable 2. This spacer 7 is interposed to maintain the distance between the cables 2... Is a resin block formed slightly smaller than the hollow shape of the column 3 as shown in the plan view of FIG. is there. The plurality of cables 2 are laid by the spacer 7 so as to be coaxial with each other in the vertical direction in the slit 6 and cross the vertical center axis of the support column.

次に、第二のケーブル2bをスリット6、6内へ挿入し、第二のスペーサー7bを支柱3の中空部内へ挿入する。続いて、第三のケーブル2cを挿入して、スリット6、6内へ3本のケーブル2を貫通させる。
その後、雨水の進入防止として、支柱3の上端部に樹脂製の蓋材8が被せられる。この蓋材8は支柱3の外形より大きく直ぐに取り外すことができる形状とされている。
Next, the second cable 2 b is inserted into the slits 6 and 6, and the second spacer 7 b is inserted into the hollow portion of the column 3. Subsequently, the third cable 2 c is inserted, and the three cables 2 are passed through the slits 6 and 6.
Thereafter, a resin lid member 8 is placed on the upper end of the support column 3 to prevent rainwater from entering. The lid member 8 has a shape that is larger than the outer shape of the column 3 and can be removed immediately.

つまり、3本のケーブル2は、ボルトやフックなど他の機械式取付具を使用せずに支柱3と架設されている。したがって、支柱3の弱軸側31へ車両が衝突して、支柱3が車両の進行方向へ倒れるに伴い、ケーブル2cがその衝突荷重により先ず蓋材8を外し、その後、各ケーブル2c〜2aがスリット6内の屈曲形状又は湾曲形状、及び空き幅(W1、W2)の変化により摩擦抵抗を受けながら一本ずつ順番に同スリット6から抜けてゆくので、同支柱3は効果的に衝突荷重を吸収しながら倒れることが可能になる。   That is, the three cables 2 are installed on the support column 3 without using other mechanical attachments such as bolts and hooks. Therefore, as the vehicle collides with the weak shaft side 31 of the column 3 and the column 3 falls in the traveling direction of the vehicle, the cable 2c first removes the cover member 8 due to the collision load, and then the cables 2c to 2a are The struts 3 are effectively removed from the slit 6 one by one while receiving frictional resistance due to changes in the bent shape or curved shape in the slit 6 and the vacant width (W1, W2). It becomes possible to fall while absorbing.

次に、本発明のガードケーブルの構築方法の一例を簡潔に説明する。
先ず、図1に示すように、道路の中央分離帯に3本のケーブル2(2a〜2c)を、ケーブル2の両端に設置した端部支柱4により2tGで引張して準備する。
そして、図7に示すように、複数の支柱3を地中へ約2mの間隔を空けて埋設された鞘管5の中空部内へ、その弱軸側31が車両の進行方向に相対峙する配置で差し込んで立設する。
次に、前記準備した3本のケーブル2を順番に持ち上げて、立設された各支柱3のスリット6内へスペーサー7a、7bを介在させながら挿入して、支柱3…間へ架設する。最後に支柱3の上端部に蓋材8を被せて完成する。
Next, an example of the guard cable construction method of the present invention will be briefly described.
First, as shown in FIG. 1, three cables 2 (2 a to 2 c) are prepared by pulling at 2 tG with end columns 4 installed at both ends of the cable 2 in the central separation zone of the road.
Then, as shown in FIG. 7, an arrangement in which the weak shaft side 31 is opposed to the traveling direction of the vehicle in the hollow portion of the sheath tube 5 embedded with a plurality of struts 3 in the ground at an interval of about 2 m. Insert and stand up.
Next, the three prepared cables 2 are lifted in order, inserted into the slits 6 of the upright columns 3 with spacers 7a and 7b interposed, and installed between the columns 3. Finally, the lid member 8 is put on the upper end portion of the column 3 to complete.

上記のように、本発明のガードケーブルは、支柱3の立設とケーブル2の架設は機械的取付具を必要としない手法で行えて、非常に簡易な方法で構築することができるだけでなく、支柱3の取り外しは単にこの反対の作業を行うのみで行えるため、誰でも容易に迅速に取り外し作業を行える。これは、暫定二車線道路の中央分離帯などに設置されている場合には、事故時に即座に支柱3を撤去して、対面交通など交通渋滞の緩和に寄与できるのである。但し、ケーブル2の引張手段やその端部構成については、この限りではない。   As described above, the guard cable of the present invention can be constructed by a method that does not require a mechanical fixture for erecting the column 3 and erection of the cable 2, and can be constructed by a very simple method. Since the column 3 can be removed simply by performing the opposite operation, anyone can easily and quickly remove the column 3. If it is installed in the median strip of the provisional two-lane road, it is possible to remove the column 3 immediately at the time of the accident and contribute to alleviating traffic congestion such as face-to-face traffic. However, this does not apply to the pulling means of the cable 2 and its end configuration.

以上に本発明を図示した実施例に基づいて説明したが、本発明は、上記実施例の構成に限定されない。その目的と要旨を逸脱しない範囲において、当業者が必要に応じて行う設計変更、応用のバリエーションの範囲を含むことを念のため言及する。   Although the present invention has been described based on the illustrated embodiment, the present invention is not limited to the configuration of the above embodiment. It should be noted that it includes a range of design changes and application variations made by those skilled in the art as needed without departing from the scope and purpose of the invention.

1 ガードケーブル
2 ケーブル(2a〜2c)
3 支柱
31 弱軸側
32 強軸側
4 端部支柱
5 鞘管
50 開口部
50a 押し込まれた部分
6 スリット6a〜6e
7 スペーサー(7a、7b)
8 蓋材
1 Guard cable 2 Cable (2a-2c)
3 Strut 31 Weak shaft side 32 Strong shaft side 4 End strut 5 Sheath tube 50 Opening 50a Pressed portion 6 Slits 6a to 6e
7 Spacer (7a, 7b)
8 Lid

Claims (2)

一定間隔をあけて立設した支柱間に、同支柱の上下方向に間隔をあけて複数本のケーブルを架設して成るガードケーブルであって、
前記支柱は、平面視が長方形の角形鋼管とされ、同支柱は平面視で長辺側となる側面が道路の延長方向に相対峙する配置とされ、地中へ予め埋設された鞘管の中空部内へ抜き挿し可能に差し込まれて立設されていること、
前記支柱の平面視で長辺側となる二側面の上部には、上端部を開口して略下方へ切り欠いたスリットがそれぞれ設けられ、
前記ケーブルは、前記支柱のスリットを貫通させて支柱間に架設されている
ことを特徴とする、ガードケーブル。
A guard cable in which a plurality of cables are erected between the struts erected at regular intervals with a space in the vertical direction of the struts,
The support column is a rectangular steel pipe having a rectangular shape in plan view, and the support column is arranged so that the side surface on the long side in the plan view is opposed to the extending direction of the road, and the hollow of a sheath tube embedded in the ground in advance. It is erected so that it can be inserted into and removed from
In the upper part of the two side surfaces that are the long side in a plan view of the support column, slits that are open at the upper end and cut substantially downward are provided, respectively.
The cable is a guard cable, wherein the cable is laid between the columns through the slits of the columns.
ケーブルは、前記支柱のスリットを貫通させて支柱間に架設されて、支柱内に挿入したスペーサーにより上下方向の間隔が保持されていることを特徴とする、請求項1に記載したガードケーブル。   2. The guard cable according to claim 1, wherein the cable is provided between the columns by passing through the slits of the columns and the vertical distance is maintained by a spacer inserted in the columns.
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