JP5334883B2 - Protective fence - Google Patents

Protective fence Download PDF

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JP5334883B2
JP5334883B2 JP2010019812A JP2010019812A JP5334883B2 JP 5334883 B2 JP5334883 B2 JP 5334883B2 JP 2010019812 A JP2010019812 A JP 2010019812A JP 2010019812 A JP2010019812 A JP 2010019812A JP 5334883 B2 JP5334883 B2 JP 5334883B2
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holes
column
main body
protective fence
base
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JP2011157715A (en
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充洋 北野
就一 佐川
雅弘 谷
昭浩 四谷
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Sekisui Jushi Corp
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Description

本発明は、道路の側縁の地覆部に設置される防護柵に関するものである。   The present invention relates to a protective fence installed on a ground cover at a side edge of a road.

一般に、橋梁部や山間部の道路においては、通行車が道路の側縁を越えて道路外に落下することを防ぐために高欄等の防護柵が設けられている。そして、これらの防護柵は、一般に道路の側縁に設けられたコンクリート製の地覆部上に取付けられている。この地覆部の強度を高めるために、地覆部の内部には、長手方向及び幅方向にそれぞれ鉄筋が配設されている。   In general, on fences and mountain roads, protective fences such as railings are provided to prevent passing vehicles from falling outside the road beyond the side edges of the road. These protective fences are generally mounted on a concrete ground cover provided on the side edge of the road. In order to increase the strength of the ground cover portion, reinforcing bars are respectively disposed in the longitudinal direction and the width direction inside the ground cover portion.

前記防護柵は、車両が道路から飛び出さないために設けられたものであるが、車両が防護柵に衝突すると車両や防護柵への破損等の影響も大きい。したがって、特に幅狭の地覆部に設けられた防護柵を取り替える場合は、防護柵の横桟を地覆部の道路側から離れた後方側に設置し、車両が地覆部の端部に乗り上げただけでは横桟に衝突しないようにする要望が増えている。この場合、該横桟を支える支柱も地覆部の後方側に移動するため、支柱が地覆部の後端側に偏って設置される場合がある。   The protective fence is provided to prevent the vehicle from jumping off the road. However, when the vehicle collides with the protective fence, the damage to the vehicle or the protective fence is large. Therefore, especially when replacing the protective fence provided on the narrow ground cover, install the side rail of the protective fence on the rear side away from the road side of the ground cover and the vehicle at the end of the ground cover. There is an increasing demand to avoid colliding with the side rail just by getting on. In this case, since the column supporting the horizontal rail also moves to the rear side of the ground cover, the column may be installed biased toward the rear end side of the ground cover.

例えば、特許文献1には、車道に沿って立設された地覆に配設されたアンカーボルトにより固定されるベースと、上記ベース上に一体に形成され且つ車道側に横梁の支持部を有するフランジとその中央部に直角に接続されたウエブと有する略T字状又は略H字状の支柱本体とからなり、前記ベースに穿孔されるアンカーボルトの貫通孔は、ウェブ下端の両側に対称に形成されると共に、フランジ下端の左右先端部の外側に位置している車道用防護柵の支柱が提案されている。
また、特許文献2には、表面フランジと背面フランジと中壁とからなる断面略H字状の支柱の下端にボトムプレートが設けられ、前記ボトムプレートには、中板の両側に左右対称にアンカーボルトのセット用孔が設けられた車道用防護柵の支柱が提案されている。
For example, in Patent Document 1, a base fixed by anchor bolts arranged on a ground cover standing along a roadway, and a support portion of a cross beam formed integrally on the base and on the roadway side. It consists of a substantially T-shaped or substantially H-shaped strut body having a flange and a web connected at right angles to the center thereof, and the through holes of the anchor bolts drilled in the base are symmetrical on both sides of the lower end of the web There has been proposed a roadway guard fence post that is formed and positioned outside the left and right front ends of the lower end of the flange.
Further, in Patent Document 2, a bottom plate is provided at the lower end of a support column having a substantially H-shaped cross section composed of a front flange, a rear flange, and a middle wall, and the bottom plate is anchored symmetrically on both sides of the middle plate. Proposals have been proposed for roadway guard fences with bolt holes.

特開2001−234515号公報JP 2001-234515 A 特開昭55−101607号公報Japanese Unexamined Patent Publication No. 55-101607

一般に、高欄等に設置される防護柵は、特許文献1〜2に示されるように、支柱のベースの前後左右には挿入孔が形成されており、地覆部上に突設されるアンカーボルトが前記挿入孔に挿入されるものであるが、前記のように、防護柵の横梁を防護柵が設置される地覆等の後方に配置する場合に、横梁を支持する支柱等も地覆の後方へ配置される。一方地覆部に取付可能なアンカーボルトの位置を勘案すると支柱等の後方への移動幅も限定され、更にアンカーボルトの前後の設置間隔を狭くすると、支柱のベース部の挿入孔にアンカーボルトを挿入させやすくなるが、地覆部に対するアンカーボルトの固着力が低下し、防護柵に車両が衝突した際、その衝突荷重によってアンカーボルトが地覆から引き抜かれたり、地覆が破損したりするおそれがある。   In general, as shown in Patent Documents 1 and 2, the guard fences installed in the handrails have insertion holes formed in the front, rear, left, and right of the base of the column, and anchor bolts that protrude from the ground cover. Is inserted into the insertion hole, as described above, when the horizontal beam of the protective fence is arranged behind the ground cover where the protective fence is installed, the column supporting the horizontal beam is also covered with the ground. Arranged backwards. On the other hand, considering the position of the anchor bolt that can be attached to the ground cover, the rearward movement width of the column is also limited, and if the installation distance between the front and rear of the anchor bolt is narrowed, the anchor bolt is installed in the insertion hole of the column base. Although it is easier to insert, the anchor bolt's adhesive strength to the ground cover part will decrease, and when the vehicle collides with the protective fence, the anchor bolt may be pulled out from the ground cover or the ground cover may be damaged by the collision load There is.

本発明は、前記の如き問題点を解消し、支柱を地覆部上に固定する際に、支柱を強固に固定することができる防護柵を提供せんとするものである。   The present invention is intended to solve the above-described problems and to provide a protective fence that can firmly fix the column when the column is fixed on the ground cover.

上記目的を達成するために、本発明は次のような構成としている。
すなわちこの発明に係る防護柵は、道路側縁の地覆部に立設された支柱の間に横桟が取付けられた防護柵であって、前記支柱は、前記横桟が取付けられる支柱本体と、該支柱本体が固定されかつアンカーボルトにより地覆部に固定されるベース部とを備え、前記ベース部は、道路側となる前部左側及び前部右側と、道路側と反対側となる後方左側及び後方右側とにアンカーボルトが貫通する貫通孔がそれぞれ設けられると共に、前記前部左側及び前部右側の貫通孔は、支柱本体の下端より前方でベース部の前端より後方に配置され、かつ後方左側及び後方右側の貫通孔は、支柱本体の下端における前後寸法の中央より前方に配置されていることを特徴とするものである。
In order to achieve the above object, the present invention is configured as follows.
That is, the protective fence according to the present invention is a protective fence in which a horizontal beam is attached between the columns erected on the roadside edge covering portion, and the column includes a column main body to which the horizontal beam is attached. And a base part fixed to the ground cover part by anchor bolts, wherein the base part includes a front left side and a front right side which are on the road side, and a rear side which is the opposite side to the road side. Through holes through which anchor bolts pass are provided on the left side and the rear right side, and the through holes on the front left side and the front right side are disposed in front of the lower end of the column main body and rearward of the front end of the base part, and The rear left and rear right through-holes are arranged in front of the center of the front-rear dimension at the lower end of the column main body.

本発明によれば、ベース部の前部左側及び前部右側の貫通孔は、支柱本体の下端より前方でベース部の前端より後方に配置され、かつ後方左側及び後方右側の貫通孔は、支柱本体の下端における前後寸法の中央より前方に配置されているので、車両の衝突荷重に対して、主に上方への引張力が生じる支柱本体の前部では、前後左右4個の貫通孔に挿入されたアンカーボルトによってベース部が捲り上がらないように強固に支持でき、支柱本体の極端な変形や、ベース部の前部の捲れ上がり等の不具合を抑えることができる。   According to the present invention, the through holes on the front left side and the front right side of the base part are arranged in front of the lower end of the column main body and behind the front end of the base unit, and the through holes on the left rear side and the right rear side are arranged on the column. Since it is arranged in front of the center of the front and rear dimensions at the lower end of the main body, it is inserted into the front and rear left and right four through-holes at the front part of the column main body that generates an upward pulling force mainly against the collision load of the vehicle The anchor bolt can firmly support the base portion so that it does not rise, and it is possible to suppress problems such as extreme deformation of the column main body and rising of the front portion of the base portion.

本発明に係わる防護柵の第1の実施形態を示す正面図である。1 is a front view showing a first embodiment of a protective fence according to the present invention. 本発明に係わる防護柵の第1の実施形態を示す側面図である。1 is a side view showing a first embodiment of a protective fence according to the present invention. 図2の主要部を示す部分拡大側面図である。It is a partial expanded side view which shows the principal part of FIG. 図3のA−A部の拡大断面図である。It is an expanded sectional view of the AA part of FIG. 図2の他の主要部を示す部分拡大側面図である。It is a partial expanded side view which shows the other main part of FIG. 本発明に係わる防護柵の第2実施形態を示す正面図である。It is a front view which shows 2nd Embodiment of the protection fence concerning this invention. 本発明に係わる防護柵の第2実施形態を示す側面図である。It is a side view which shows 2nd Embodiment of the protection fence concerning this invention. 図7の主要部を示す部分拡大側面図である。It is a partial expanded side view which shows the principal part of FIG. 図7の主要部を示す部分拡大背面図である。FIG. 8 is a partially enlarged rear view showing the main part of FIG. 7. 図8のB−B部の拡大断面図である。It is an expanded sectional view of the BB part of FIG. 図8の主要部を示す部分拡大平面図である。It is a partial enlarged plan view which shows the principal part of FIG. 図7の他の主要部を示す部分拡大側面図である。It is a partial expanded side view which shows the other main part of FIG. 本発明に係わる防護柵の第2の実施形態の変形を示す側面図である。It is a side view which shows the deformation | transformation of 2nd Embodiment of the guard fence concerning this invention. 図13の主要部を表す拡大側面図である。It is an enlarged side view showing the principal part of FIG. 図14のC−C部の拡大断面図である。It is an expanded sectional view of the CC section of FIG.

次に、本発明を実施するための最良の形態について図面を参照し、具体的に説明する。   Next, the best mode for carrying out the present invention will be specifically described with reference to the drawings.

図1〜2は本発明に係る防護柵Pにおいて第1の実施形態を示す説明図であり、図1は正面図、図2は側面図を示している。1は道路側縁の地覆部Rに立設された支柱、2は支柱1の間に架設された横桟であり、本発明に係る防護柵Pは支柱1、横桟2から主に構成され、支柱1はアンカーボルトAを介して地覆部Rに固定されている。尚、防護柵P及びその構成部材において、相対的に道路側を前部又は前方とし、その反対側を後部又は後方とする。   1 and 2 are explanatory views showing a first embodiment of the protective fence P according to the present invention, FIG. 1 is a front view, and FIG. 2 is a side view. Reference numeral 1 denotes a support column erected on the roadside edge cover R, 2 is a horizontal beam constructed between the columns 1, and the guard fence P according to the present invention is mainly composed of the support column 1 and the horizontal beam 2. The support column 1 is fixed to the ground covering portion R via the anchor bolt A. In the protective fence P and its constituent members, the road side is relatively front or front, and the opposite side is rear or rear.

支柱1は、横桟2が取付けられる支柱本体3と、該支柱本体3の下端が固定されるベース部4とを備えている。   The column 1 includes a column main body 3 to which the horizontal rail 2 is attached and a base portion 4 to which the lower end of the column main body 3 is fixed.

横桟2は、支柱1の間に架設されるものであり、車輌が衝突した際の衝撃を吸収して容易に破断しないための必要な強度を考慮すると、強度的に安定しておりコストの安い鋼管を適宜長さに切断したものが好適に用いられ、耐食性を向上させるために、亜鉛めっきや塗装を施してもよい。本実施形態では、横桟2の断面形状は円形であり、横桟2同士は横桟2内に挿入された筒状のスリーブ21とボルトBを介して横方向に連結されている。尚、横桟2の断面形状は矩形状あるいは楕円形状でもよい。   The horizontal beam 2 is installed between the columns 1 and is considered to be stable in terms of strength and cost, considering the strength required to absorb the impact when the vehicle collides and not easily break. What cheaply cut the steel pipe was used suitably, and in order to improve corrosion resistance, you may give galvanization and coating. In this embodiment, the cross-sectional shape of the horizontal rails 2 is circular, and the horizontal rails 2 are connected to each other in the horizontal direction via a cylindrical sleeve 21 inserted into the horizontal rail 2 and a bolt B. In addition, the cross-sectional shape of the crosspiece 2 may be rectangular or elliptical.

支柱本体3は、本実施形態では、前後に相対する前フランジ部31と、後フランジ部32と、前フランジ部31と後フランジ部32とを接続する連結板部33とから構成され、溶接によって一体化されている。前フランジ部31の前面には、後方に凹んで形成された支持部31aが設けられ、横桟2が該支持部31aに当接されて固定ボルトBを介して取付けられている。後フランジ部32は、前フランジ部31より左右方向の幅が短くなされている。尚、支柱本体3は、H鋼等を用いた横断面H字状でもよく、或いは、円形状、矩形状等のパイプ状の形態でもよい。   In this embodiment, the column main body 3 is composed of a front flange portion 31 opposed to the front and rear, a rear flange portion 32, and a connecting plate portion 33 that connects the front flange portion 31 and the rear flange portion 32. It is integrated. On the front surface of the front flange portion 31, there is provided a support portion 31a formed to be recessed rearward, and the horizontal rail 2 is attached to the support portion 31a through a fixing bolt B. The rear flange portion 32 is shorter in the left-right direction than the front flange portion 31. The column main body 3 may have a H-shaped cross section using H steel or the like, or may have a pipe shape such as a circular shape or a rectangular shape.

支柱本体3は、車輌が衝突した際の衝撃を吸収して容易に破断しないための必要な強度を考慮すると、強度的に安定しておりコストの安い鋼板を適宜形状に加工したものを接合したものが好適に用いられ、耐食性を向上させるために、亜鉛めっきや塗装を施してもよい。また支柱本体3は、鋳鉄、アルミニウム合金、ステンレス合金等の他の金属を用いてもよい。   Considering the strength required to absorb the impact when the vehicle collides and not easily break, the column main body 3 is joined with a steel plate that is stable in strength and cheaply processed into a suitable shape. A thing is used suitably and in order to improve corrosion resistance, you may give galvanization and coating. Further, the column main body 3 may use other metals such as cast iron, aluminum alloy, and stainless alloy.

図3〜5は、図2の主要部の説明図であり、図3は図2の部分拡大側面図、図4は図3のA−A部の拡大断面図、図4は図2の他の部分拡大側面図である。支柱1のベース部4は、図3〜5に示すように、横長長方形状で支柱本体3の下端が該ベース部4の中央よりも後方に偏った位置に固定されており、道路側となる前部左側と前部右側、道路側と反対側となる後方左側と後方右側とに貫通孔5が設けられている。そして前部左側及び前部右側の貫通孔5a、5bは、支柱本体3の下端の前端よりも前方で、かつベース部4の前端より後方に位置している。また後方左側及び後方右側の貫通孔5c、5dは、支柱本体3の下端の前後寸法Xの中央より前方に位置している。   3 to 5 are explanatory views of the main part of FIG. 2, FIG. 3 is a partially enlarged side view of FIG. 2, FIG. 4 is an enlarged sectional view of the AA part of FIG. FIG. As shown in FIGS. 3 to 5, the base portion 4 of the column 1 has a horizontally long rectangular shape and is fixed at a position where the lower end of the column body 3 is biased rearward from the center of the base unit 4, and becomes the road side. The through holes 5 are provided in the front left side and the front right side, and the rear left side and the rear right side opposite to the road side. The through holes 5 a and 5 b on the left side of the front part and the right side of the front part are located in front of the front end of the lower end of the column body 3 and rearward of the front end of the base part 4. Further, the rear left and rear right through holes 5 c and 5 d are located in front of the center of the front-rear dimension X at the lower end of the column main body 3.

地覆部Rには、アンカーボルトAが打設され、地覆部R上にアンカーボルトAの上端であるねじ部A1が突出している。このねじ部A1は、ベース部4の各貫通孔5に挿入され、更にナットN、スプリングワッシャW1及び平板状のワッシャW2が取付けられている。そしてねじ部A1にナットNを締め付けることにより、ベース部4が地覆部R上に固定される。   An anchor bolt A is driven on the ground cover portion R, and a screw portion A1 which is the upper end of the anchor bolt A protrudes on the ground cover portion R. This threaded portion A1 is inserted into each through hole 5 of the base portion 4, and a nut N, a spring washer W1, and a flat plate washer W2 are further attached. And the base part 4 is fixed on the ground covering part R by tightening the nut N to the screw part A1.

ベース部4は、車輌が衝突した際に、支柱本体3に加わる衝突荷重を吸収して容易に破断しないための必要な強度を考慮すると、強度的に安定しておりコストの安い鋼板を適宜長さに切断したものが好適に用いられ、耐食性を向上させるために、亜鉛めっきや塗装を施してもよい。また、ベース部4の形状は、設置される地覆部Rの幅寸法や必要な強度に応じて、正方形状や縦長の長方形状でもよく、隅部を切除した形態でもよい。   Considering the strength required to absorb the collision load applied to the column main body 3 and not easily break when the vehicle collides, the base 4 is made of a steel plate that is stable in strength and inexpensive. What was cut | disconnected is used suitably, and in order to improve corrosion resistance, you may give galvanization and coating. Further, the shape of the base portion 4 may be a square shape or a vertically long rectangular shape depending on the width dimension of the ground covering portion R to be installed and the required strength, or may be a form in which a corner portion is cut off.

ベース部4の道路側となる前部左側と前部右側に設けられた貫通孔5a、5bは、本実施形態では、支柱本体の連結板部33を中央にして左右対称状に形成され、防護柵Pの長手方向である横方向に長い横長孔である。貫通孔5a、5bの形態は特に限定されるものではなく、アンカーボルトAの位置調整や支柱1の設置誤差が生じても貫通孔5a、5bにアンカーボルトAを挿入してナットN等によりベース部4が締結される形態であればよい。   In this embodiment, the through holes 5a and 5b provided on the front left side and the front right side, which are the road side of the base part 4, are formed symmetrically with the connecting plate part 33 of the column main body as the center, and are protected. It is a laterally long hole that is long in the lateral direction, which is the longitudinal direction of the fence P. The form of the through holes 5a and 5b is not particularly limited. Even if the position adjustment of the anchor bolt A or the installation error of the support column 1 occurs, the anchor bolt A is inserted into the through holes 5a and 5b and the base is formed by the nut N or the like. What is necessary is just the form to which the part 4 is fastened.

貫通孔5a、5bより後方に設けられた貫通孔5c、5dは、これも支柱本体3の連結板部33を中央にして左右対称状に形成され、防護柵Pの長手方向である横方向に長い横長孔である。貫通孔5c、5dの形態は特に限定されるものではなく、アンカーボルトAの位置調整や支柱1の設置誤差が生じても前記貫通孔5c、5dにアンカーボルトAを挿入してナットN等によりベース部4が締結される形態であればよい。   The through-holes 5c and 5d provided behind the through-holes 5a and 5b are also formed symmetrically with the connecting plate portion 33 of the column main body 3 in the center, and in the lateral direction that is the longitudinal direction of the protective fence P. It is a long oblong hole. The form of the through holes 5c and 5d is not particularly limited. Even if the position adjustment of the anchor bolt A or the installation error of the support column 1 occurs, the anchor bolt A is inserted into the through holes 5c and 5d and the nut N is used. Any configuration may be used as long as the base portion 4 is fastened.

次に、防護柵Pに車両が衝突した場合について詳しく説明する。本実施形態に係る防護柵Pは、車両が地覆部Rの前端に乗り上げただけでは、防護柵Pには衝突しにくくするために、防護柵Pの横桟2をなるべく地覆部Rの後方に配置されている。そして支柱1もなるべく地覆部Rの後方に位置するように、支柱本体3の下端をベース部4の中央よりも後方に偏った位置に固定した形態であるが、車両が地覆部R上に乗り上げて、防護柵Pに衝突した場合、その衝突荷重によって、支柱本体3の前部は上方へ引き上げられる引張力が働き、支柱本体3の後部は下方へ押し下げられる圧縮力が生じる。   Next, the case where the vehicle collides with the protective fence P will be described in detail. The protective fence P according to the present embodiment is configured so that the horizontal rail 2 of the protective fence P is as close to the ground cover R as possible in order to make it difficult to collide with the protective fence P only when the vehicle rides on the front end of the ground cover R. It is arranged at the rear. Then, the lower end of the column main body 3 is fixed at a position biased rearward from the center of the base portion 4 so that the column 1 is positioned as far as possible behind the ground covering portion R. When a collision occurs with the protective fence P, a tensile force that pulls the front portion of the column main body 3 upward works and a compression force that pushes the rear portion of the column main body 3 downward occurs due to the collision load.

前記引張力に対しては、ベース部4の貫通孔5a、5bは、支柱本体3の下端より前方でベース部4の前端より後方に配置され、貫通孔5c、5dは、支柱本体3の下端における前後寸法Xの中央より前方でかつ前フランジ部31より後方に位置しているので、ベース部4の前記4個の貫通孔5に挿入されたアンカーボルトAによってベース部4の前部が上方へ捲り上げられることを効率的に抑えることができる。更に、本実施形態では、貫通孔5a、5bの縁部間の間隔Y1、貫通孔5c、5dの縁部間の間隔Y2は、支柱本体3の下端前端の左右寸法Y3より短い間隔で形成されているので、比較的大きな引張力が生じる前フランジ部31が固定されたベース部4の前部は、前後に位置する貫通孔5a、5b、5c及び5dによって、上方への捲れ上がりを強固に抑えることができる。   With respect to the tensile force, the through holes 5a and 5b of the base part 4 are arranged in front of the lower end of the column main body 3 and behind the front end of the base part 4, and the through holes 5c and 5d are lower ends of the column main body 3. The front part of the base part 4 is moved upward by the anchor bolts A inserted into the four through holes 5 of the base part 4 because the front part is located in front of the center of the front-rear dimension X in FIG. It is possible to effectively suppress being lifted up. Furthermore, in this embodiment, the space | interval Y1 between the edge parts of the through-holes 5a and 5b and the space | interval Y2 between the edge parts of the through-holes 5c and 5d are formed with a space | interval shorter than the left-right dimension Y3 of the lower end front end of the support | pillar main body 3. Therefore, the front portion of the base portion 4 to which the front flange portion 31 where a relatively large tensile force is generated is fixed, and the through-holes 5a, 5b, 5c, and 5d positioned at the front and rear are strongly swollen upward. Can be suppressed.

アンカーボルトAは、地覆部Rに強固に固着できる形態であれば、地覆部Rに設けた挿入孔Cに挿入して接着剤により両者の隙間を充填する形態でもよく、また前記挿入孔Cに埋設した雌めじアンカー(図示せず)に螺合されるものでもよい。また、後方のアンカーボルトAは、地覆部R内の長手方向に最後方において配設された鉄筋6より前方に位置している方が好ましい。これにより、支柱1に掛かる衝突荷重において、後方左側及び後方右側の貫通孔5c、5dに挿入されたアンカーボルトAに掛かる後方への荷重は、地覆部R中の鉄筋6に分散させて支えることができる。   As long as the anchor bolt A can be firmly fixed to the ground covering portion R, the anchor bolt A may be inserted into the insertion hole C provided in the ground covering portion R and filled with a gap between them. It may be screwed into a female female anchor (not shown) embedded in C. Further, the rear anchor bolt A is preferably located in front of the reinforcing bars 6 arranged at the rearmost in the longitudinal direction in the ground covering portion R. Thereby, in the collision load applied to the column 1, the backward load applied to the anchor bolts A inserted into the through holes 5 c and 5 d on the rear left side and the rear right side is distributed and supported by the reinforcing bars 6 in the ground covering portion R. be able to.

図6〜12は、本発明に係わる防護柵Pの第2の実施形態を示す説明図であり、図6は正面図、図7は側面図、図8は図7の主要部の部分拡大側面図、図9は図7の主要部の部分拡大背面図、図10は図8のB−B部の拡大断面図、図11は図7〜8に示された後記する補強部材7の拡大平面図、図12は図8の他の主要部の部分拡大側面図である。   6-12 is explanatory drawing which shows 2nd Embodiment of the guard fence P concerning this invention, FIG. 6 is a front view, FIG. 7 is a side view, FIG. 8 is the partial expanded side view of the principal part of FIG. 9 is a partially enlarged rear view of the main part of FIG. 7, FIG. 10 is an enlarged sectional view of the BB part of FIG. 8, and FIG. 11 is an enlarged plan view of the reinforcing member 7 described later shown in FIGS. 12 and 12 are partially enlarged side views of other main parts of FIG.

本実施形態に係る防護柵Pは、図1〜5に示された防護柵Pと比べて、主に地覆部Rに固定される支柱1の位置や、支柱1のベース部4の貫通孔5に挿入されるアンカーボルトAの孔の位置や、ベース部4と地覆部Rとの間に位置する補強部材7が設けられている点が異なるものであるが、他の形態は同様である。   Compared with the protective fence P shown in FIGS. 1 to 5, the protective fence P according to the present embodiment is mainly the position of the support column 1 fixed to the ground covering portion R and the through hole of the base portion 4 of the support column 1. 5 is different in the position of the hole of the anchor bolt A to be inserted into 5 and the point that the reinforcing member 7 located between the base portion 4 and the ground covering portion R is provided. is there.

すなわち第2の実施形態に係る防護柵Pは、支柱1の支柱本体3の後部が地覆部Rの後端から張り出しており、該支柱本体3の後部が固定されるベース部4の後部も地覆部Rの後端から張り出された状態で固定されている。地覆部R上には、補強部材7が載置され、その上にベース部4が位置している。補強部材7は、ベース部4と同様な横長長方形状であり、ベース部4と同様に道路側となる前部左側と前部右側、その後方の後方左側と後方右側に上下に貫通する貫通孔8が設けられている。   That is, in the protective fence P according to the second embodiment, the rear part of the column main body 3 of the column 1 protrudes from the rear end of the ground covering part R, and the rear part of the base part 4 to which the rear part of the column main body 3 is fixed is also provided. It is fixed in a state of protruding from the rear end of the ground covering portion R. On the ground covering portion R, the reinforcing member 7 is placed, and the base portion 4 is positioned thereon. The reinforcing member 7 has a horizontally long rectangular shape similar to that of the base portion 4, and similarly to the base portion 4, a through-hole penetrating vertically in the front left side and the front right side, which is the road side, and in the rear left side and the rear right side. 8 is provided.

地覆部RのアンカーボルトAは、補強部材7の各貫通孔8を通って、ベース部4の貫通孔5に挿入され、ねじ部A1にナットN、スプリングワッシャW1及び平板上のワッシャW2が取付けられている。ナットNをねじ部A1に締め付けることにより、ベース部4の後端が地覆部Rの後端より張り出した状態で固定される。   The anchor bolt A of the ground cover portion R is inserted into the through hole 5 of the base portion 4 through each through hole 8 of the reinforcing member 7, and the nut N, the spring washer W1, and the washer W2 on the flat plate are attached to the screw portion A1. Installed. By tightening the nut N to the screw portion A1, the rear end of the base portion 4 is fixed in a state of protruding from the rear end of the ground covering portion R.

次に、第2の実施形態に係る防護柵Pに車両が衝突した場合について詳しく説明する。本実施形態に係る防護柵Pは、第1の実施形態に係る防護柵Pと比べて、主に支柱1の後部が地覆部Rの後端から張り出している点が相違している。そのため、衝突荷重によって支柱本体3の後部に生じる圧縮力によって、ベース部4の後部が下方に向けて大きく変形し、車両による衝突荷重を支柱1では吸収しきれず、地覆部Rから支柱1が後方に大きく倒れ、また支柱本体3とベース部4との接合部が破断してしまうおそれがある。   Next, the case where the vehicle collides with the protective fence P according to the second embodiment will be described in detail. The guard fence P according to this embodiment is different from the guard fence P according to the first embodiment in that the rear part of the support column 1 mainly protrudes from the rear end of the ground covering part R. Therefore, due to the compressive force generated at the rear part of the column body 3 due to the collision load, the rear part of the base part 4 is greatly deformed downward, and the collision load by the vehicle cannot be absorbed by the column 1, and the column 1 is removed from the ground cover R. There is a risk that the body will fall greatly backward and the joint between the column main body 3 and the base portion 4 may be broken.

前記引張力に対しては、第1の実施形態の場合と同様に、ベース部4の貫通孔5a、5bは、支柱本体3の下端より前方でベース部4の前端より後方に配置され、ベース部4の貫通孔5c、5dは、支柱本体3の下端における前後寸法Xの中央より前方に位置しているので、ベース部4の4個の貫通孔5に挿入されたアンカーボルトAによってベース部4の前部が上方へ捲り上げられることを効率的に抑えることができる。また前記圧縮力に対しては、図8に示すように、補強部材7の後部が、ベース部4と同様に地覆部Rの後端から後方に張り出しているので、補強部材7によりベース部4が下方へ押し下げられることを抑えることができる。   With respect to the tensile force, as in the case of the first embodiment, the through holes 5a and 5b of the base portion 4 are arranged in front of the lower end of the column body 3 and rearward of the front end of the base portion 4, and Since the through holes 5c and 5d of the portion 4 are located in front of the center of the front-rear dimension X at the lower end of the column main body 3, the base portion is fixed by the anchor bolts A inserted into the four through holes 5 of the base portion 4. It is possible to efficiently suppress the front part of 4 from being lifted upward. Further, with respect to the compression force, as shown in FIG. 8, the rear portion of the reinforcing member 7 projects rearward from the rear end of the ground covering portion R in the same manner as the base portion 4. It can suppress that 4 is pushed down below.

これらの構造により、前記防護柵Pの第1の実施形態に記載した効果に加えて、支柱1が後方に向けて極端に倒れることを抑えることができる。また本実施形態のように、補強部材7の厚みをベース部4の厚みより厚くしておけば、前記ベース部4が下方へ押し下げられることをより効果的に抑えることができるので好ましい。また補強部材7の平面視形状は、ベース部4の平面視形状と同様としてもよいが、ベース部4よりも大きくすることによって、ベース部4が下方へ押し下げられることを更に効果的に抑えることができる。   With these structures, in addition to the effects described in the first embodiment of the protective fence P, it is possible to suppress the support column 1 from being extremely tilted backward. Moreover, it is preferable to make the thickness of the reinforcing member 7 thicker than the thickness of the base portion 4 as in the present embodiment, since it is possible to more effectively suppress the base portion 4 from being pushed downward. The shape of the reinforcing member 7 in plan view may be the same as the shape of the base portion 4 in plan view, but by making it larger than the base portion 4, it is possible to more effectively suppress the base portion 4 from being pushed downward. Can do.

また本実施形態では、貫通孔5a、5bの縁部間の間隔Y1は、支柱本体3の下端前端の左右寸法Y3より短い間隔で形成されているので、防護柵Pに車両が衝突した際、ベース部4の前部の中央部から捲れ上がりを貫通孔5a、5bに挿入されたアンカーボルトAにより効果的に抑えることができる。加えて貫通孔5c、5dの縁部間の間隔Y2は、前記貫通孔5a、5bの縁部間の間隔Y1よりも広く、当該間隔部分だけ衝突荷重が貫通孔5c、5dに挿入されたアンカーボルトAにも分散させることができるので、前記衝突荷重が貫通孔5a、5bに挿入されたアンカーボルトAの極端な変形も抑えることができる。また貫通孔5c、5dの縁部間の間隔Y2を、支柱本体3の下端の左右寸法Y3より広くすれば、前記衝突荷重が一層分散させることができる。   Moreover, in this embodiment, since the space | interval Y1 between the edge parts of the through-holes 5a and 5b is formed in the space | interval shorter than the left-right dimension Y3 of the lower end front end of the support | pillar main body 3, when a vehicle collides with the guard fence P, The rising from the central portion of the front portion of the base portion 4 can be effectively suppressed by the anchor bolts A inserted into the through holes 5a and 5b. In addition, the distance Y2 between the edges of the through holes 5c and 5d is wider than the distance Y1 between the edges of the through holes 5a and 5b, and the anchor in which the collision load is inserted into the through holes 5c and 5d is only the distance. Since it can also disperse | distribute to the volt | bolt A, the extreme deformation | transformation of the anchor bolt A in which the said collision load was inserted in the through-holes 5a and 5b can also be suppressed. Moreover, if the space | interval Y2 between the edge parts of the through-holes 5c and 5d is made larger than the left-right dimension Y3 of the lower end of the support | pillar main body 3, the said collision load can be disperse | distributed further.

また補強部材7は、地覆部R上に載置できる形態であればよいので、例えば橋梁や山間部の道路の谷側のように地覆部の後方に足場等の設置が困難な場所に対しては、施工コストを抑え、施工作業も容易となる。   Moreover, since the reinforcement member 7 should just be a form which can be mounted on the ground cover part R, it is in the place where installation of a scaffold etc. is difficult behind a ground cover part, for example like the valley side of a road of a bridge or a mountain part. On the other hand, the construction cost is reduced and the construction work is facilitated.

補強部材7は、本実施形態では、図11に示すように、平面視でベース部4と略同形となされ、また貫通孔8の形状及びその間隔は、ベース部4の各貫通孔5a、5b、5c及び5dと平面視で重なるように貫通孔8a、8b、8c及び8dとして配置されている。これにより、ベース部4の各貫通孔5と補強部材7の各貫通孔8との位置合わせが容易であり、外観上もベース部4と補強部材7とが一体的に見えるので好ましいが、補強部材7を介してベース部4を地覆部Rに強固に固定することが可能であり、加えてベース部4を支えるために充分な強度を備えていれば、補強部材7の形状は平面視でベース部4より大形でもよく、反対に小形でもよく、あるいは左右2個一対の形態でもよい。また、各貫通孔8は、少なくともアンカーボルトAが挿入されてベース部4の各貫通孔5に挿入できる形態であればよく、例えば、貫通孔8a、8b、又は貫通孔8cと8dとが繋がって1個の貫通孔となされた形態でもよい。   In the present embodiment, as shown in FIG. 11, the reinforcing member 7 has substantially the same shape as the base portion 4 in plan view, and the shape and the interval of the through holes 8 are the through holes 5 a and 5 b of the base portion 4. Through holes 8a, 8b, 8c and 8d are arranged so as to overlap with 5c and 5d in plan view. This facilitates the alignment of the through holes 5 of the base portion 4 and the through holes 8 of the reinforcing member 7 and is preferable because the base portion 4 and the reinforcing member 7 can be seen integrally. If the base portion 4 can be firmly fixed to the ground covering portion R via the member 7, and if the base portion 4 has sufficient strength to support the base portion 4, the shape of the reinforcing member 7 is a plan view. Therefore, it may be larger than the base part 4 and may be smaller, or may be a pair of left and right. Moreover, each through-hole 8 should just be a form which at least anchor bolt A is inserted and can be inserted in each through-hole 5 of the base part 4, for example, the through-holes 8a and 8b or the through-holes 8c and 8d are connected. Alternatively, it may be a single through hole.

アンカーボルトAにおいて、後方のアンカーボルトAは、第1の実施形態に係る防護柵Pと同様に、地覆部R内の長手方向に最後方において配設された鉄筋8より前方に位置しているので、支柱1に掛かる衝突荷重において、後方左側及び後方右側の貫通孔5c、5dに挿入されたアンカーボルトAに掛かる後方への荷重は、地覆部R中の鉄筋8に分散させて支えることができる。   In the anchor bolt A, the rear anchor bolt A is located in front of the reinforcing bar 8 disposed at the rearmost in the longitudinal direction in the ground covering portion R, like the protective fence P according to the first embodiment. Therefore, in the collision load applied to the column 1, the backward load applied to the anchor bolts A inserted in the through holes 5 c and 5 d on the rear left side and the rear right side is dispersed and supported by the reinforcing bars 8 in the ground covering portion R. be able to.

図13〜15は、本発明の第2の実施形態に係る防護柵Pの変形を示す説明図であり、図13は主要部の側面図、図14は図13の部分拡大側面図、図15は図14のC−C部の拡大断面図である。本実施形態に係る防護柵Pは、図6〜12に示された防護柵Pと比べて、横桟2の配置や外径、これら横桟2を支持する支柱本体3の前フランジ部31及び後フランジ部32の形態が主に異なるものであるが、他の形態は同様である。   13-15 is explanatory drawing which shows the deformation | transformation of the guard fence P which concerns on the 2nd Embodiment of this invention, FIG. 13 is a side view of a principal part, FIG. 14 is the elements on larger scale of FIG. FIG. 15 is an enlarged cross-sectional view of a CC portion in FIG. 14. The guard fence P according to the present embodiment has an arrangement and outer diameter of the horizontal rails 2, the front flange portion 31 of the column main body 3 that supports the horizontal rails 2, and the protective fence P shown in FIGS. The form of the rear flange portion 32 is mainly different, but the other forms are the same.

すなわち、支柱本体3の形態、横桟2の外径や配置が異なるものであっても、ベース部4の貫通孔5a、5bは、支柱本体3の下端より前方でベース部4の前端より後方に配置され、貫通孔5c、5dは、支柱本体の下端寸法の中央より前方に位置し、加えて補強部材7の後部が、ベース部4と同様に地覆部Rの後端より後方に張り出しているので、車両が防護柵Pに衝突して、その衝突荷重が支柱本体3に掛かっても、前記と同様に、前記防護柵Pの第1の実施形態に記載した効果に加えて、支柱1が後方に向けて極端に倒れることを抑えることができる。   That is, even if the form of the column main body 3 and the outer diameter and arrangement of the cross rail 2 are different, the through holes 5a and 5b of the base part 4 are in front of the lower end of the column main body 3 and behind the front end of the base part 4. The through holes 5c and 5d are located in front of the center of the lower end dimension of the column main body, and the rear portion of the reinforcing member 7 projects rearward from the rear end of the ground covering portion R like the base portion 4. Therefore, even if the vehicle collides with the protective fence P and the collision load is applied to the column main body 3, in addition to the effects described in the first embodiment of the protective fence P, the column It can suppress that 1 falls extremely toward back.

1 支柱
2 横桟
3 支柱本体
4 ベース部
5 貫通孔
5a、5b、5c、5d 貫通孔
6 鉄筋
7 補強部材
8 貫通孔
A アンカーボルト
N ナット
X 支柱本体の下端における前後寸法
R 地覆部
P 防護柵
DESCRIPTION OF SYMBOLS 1 Support | pillar 2 Horizontal cross 3 Prop body 4 Base part 5 Through-hole 5a, 5b, 5c, 5d Through-hole 6 Reinforcing bar 7 Reinforcement member 8 Through-hole A Anchor bolt N Nut X fence

Claims (1)

道路側縁の地覆部に立設された支柱の間に横桟が取付けられた防護柵であって、前記支柱は、前記横桟が取付けられる支柱本体と、該支柱本体が固定されかつアンカーボルトにより地覆部に固定されるベース部とを備え、前記ベース部は、道路側となる前部左側及び前部右側と、道路側と反対側となる後方左側及び後方右側とにアンカーボルトが貫通する貫通孔がそれぞれ設けられると共に、前記前部左側及び前部右側の貫通孔は、支柱本体の下端より前方でベース部の前端より後方に配置され、かつ後方左側及び後方右側の貫通孔は、支柱本体の下端における前後寸法の中央より前方に配置されていることを特徴とする防護柵。   A protective fence in which a horizontal beam is attached between columns that are erected on the ground covering portion of the road side edge, the column includes a column main body to which the horizontal beam is mounted, and the column main body is fixed and anchored A base part fixed to the ground cover part by bolts, and the base part has anchor bolts on the front left side and front right side which are the road side, and on the rear left side and the rear right side which are opposite to the road side. The through holes on the left side and the right side of the front part are arranged in front of the lower end of the column main body and behind the front end of the base part, and the through holes on the left side and the right side of the rear part are provided. The protective fence is arranged in front of the center of the front-rear dimension at the lower end of the support body.
JP2010019812A 2010-01-30 2010-01-30 Protective fence Active JP5334883B2 (en)

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Publication number Priority date Publication date Assignee Title
JP6223719B2 (en) * 2013-06-06 2017-11-01 Jfe建材株式会社 Guard fence support
JP6389771B2 (en) * 2015-02-02 2018-09-12 株式会社住軽日軽エンジニアリング Protective fence
JP2020084645A (en) * 2018-11-28 2020-06-04 エフエムレーリング株式会社 Pole for guard fence and guard fence

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JPH09170202A (en) * 1995-12-19 1997-06-30 Nippon Hoan Kizai Seizo Kk Shock absorbing member
JP4414111B2 (en) * 2001-03-29 2010-02-10 株式会社興和工業所 Support fence post
JP2011007033A (en) * 2009-05-22 2011-01-13 Fm Railing Kk Post for guard fence
JP5443868B2 (en) * 2009-07-17 2014-03-19 株式会社住軽日軽エンジニアリング Guard post

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