JP5779069B2

JP5779069B2 - Protective fence

Info

Publication number: JP5779069B2
Application number: JP2011220154A
Authority: JP
Inventors: 充洋北野; 大花牟禮
Original assignee: Sekisui Jushi Corp
Current assignee: Sekisui Jushi Corp
Priority date: 2011-10-04
Filing date: 2011-10-04
Publication date: 2015-09-16
Anticipated expiration: 2031-10-04
Also published as: JP2013079525A

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。 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.

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、横桟を道路側から離れた後方に設置する要望が増えており、横桟を支える支柱を地覆部の後方に設置するばかりでなく、更に支柱においても横桟をなるべく後方に支えることができるような構造が採用されることがある。 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, in particular, when replacing the protective fence provided on the narrow ground cover, there is an increasing demand to install the horizontal rail behind the road, and the column supporting the horizontal rail is located behind the ground cover. In addition to the installation, a structure that can support the horizontal rail as far back as possible in the support column may be employed.

例えば、特許文献１には、橋梁の地覆コンクリート上に固定されるプレートと、前部フランジと、後部フランジと、両フランジを連結するウエブを有すると共に、前記プレート上に立設された支持本体と、前記プレートの下面に締結部材を介して配置され、前記地覆コンクリートの車道の反対側面に圧接された補助金具とを備える防護柵用支柱が提案されている。 For example, Patent Document 1 includes a plate fixed on a bridge cover concrete, a front flange, a rear flange, and a web that connects both flanges, and a support body erected on the plate. And a guard fence post that is disposed on the lower surface of the plate via a fastening member and is attached to the opposite side surface of the roadway of the cover concrete.

特開２０１１−７０３３号公報JP 2011-7033 A

前記防護柵支柱においては、支柱のプレートの後方が地覆コンクリートの後端から更に後方にはみ出ても、補助金具で支えることができるものであるが、一般に地覆コンクリートより後方は、河川や崖等のような作業者が立ち入ることが困難な場合があり、補助金具を取付ける際の作業性は必ずしもよくなく、また補助金具を用いる分のコストが上昇する。 In the guard fence post, even if the rear of the plate of the support protrudes further from the rear end of the cover concrete, it can be supported by auxiliary metal fittings. It may be difficult for an operator such as the above to enter, and the workability when attaching the auxiliary metal fitting is not necessarily good, and the cost for using the auxiliary metal fitting increases.

本発明は、前記の如き問題点を解消し、地覆部上に設置する際に、防護柵の横桟をなるべく後方に設置しつつ、安定的に取付け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 eliminates the above-mentioned problems, and provides a protective fence that can be stably mounted while installing the horizontal rail of the protective fence as far as possible when installing on the ground cover. Is.

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前フランジ部と、前記前フランジ部の後方に対向して配置された後フランジ部と、該前フランジ部と後フランジ部とを連結する連結片とを備えた支柱本体と、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、
前記前フランジ部は、前面が道路に面するようにしてベース部に固定される前側立上り片と、該前側立上り片の先端を折れ部として、該折れ部から上斜め後方に向けて傾斜する前側傾斜片と、該前側傾斜片の上端から上方に立ち上がり横桟が取付けられる横桟取付片とが形成され、
前記後フランジ部は、ベース部に固定される後側立上り片と、該後側立上り片の先端を折れ部として、該折れ部から上斜め後方に向けて傾斜する傾斜片と、該傾斜片の先端から上方に立ち上がり前記前フランジ部の横桟取付片の後方に相対向配置された立上り部とが形成され、
前記後フランジ部における後側立上り片の先端の折れ部は、前記前フランジ部における前側立上り片の先端の折れ部よりも低い高さ位置に形成され、
かつ、前記後フランジ部における後フランジ部と連結片とが接合する接合面は、前記後側立上り片の先端の折れ部より上方では該折れ部より後方に位置しており、
前記立上り部を地覆部の後端より後方にはみ出させて、前記支柱は地覆部に立設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.
In other words, 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 is a front flange portion to which the horizontal beam is attached. A column body including a rear flange portion disposed opposite to the rear of the front flange portion, a connecting piece connecting the front flange portion and the rear flange portion, and the column body is fixed and anchored. A base portion fixed to the ground cover portion with a bolt,
The front flange portion includes a front rising piece fixed to the base portion so that the front surface faces the road, and a front side inclined obliquely upward and rearward from the folding portion with the front end of the front rising piece as a bent portion. An inclined piece and a horizontal beam attaching piece on which the horizontal beam is raised upward from the upper end of the front inclined piece are formed ,
The rear flange portion includes a rear rising piece fixed to the base portion, an inclined piece that is inclined upward and rearward from the bent portion with the tip of the rear rising piece as a bent portion, and the inclined piece a rising portion, which is opposed located behind the transverse桟取with pieces of the front flange portion Ri rising upward from the tip is formed,
The bent portion at the tip of the rear rising piece in the rear flange portion is formed at a lower height than the bent portion at the tip of the front rising piece in the front flange portion,
And bonding surface and the connecting piece and the rear flange portion of the rear flange portion is joined, in the above the broken portion of the distal end of the rear rising piece is located behind the said folding portion,
The upright portion protrudes rearward from the rear end of the ground covering portion, and the support column is erected on the ground covering portion.

本発明によれば、前記前フランジ部は、前面が道路に面するようにしてベース部に固定される前側立上り片と、該前側立上り片の先端を折れ部として、該折れ部から上斜め後方に向けて傾斜する前側傾斜片と、該前側傾斜片の上端から上方に立ち上がり横桟が取付けられる横桟取付片とが形成され、
前記後フランジ部は、ベース部に固定される後側立上り片と、該後側立上り片の先端を折れ部として、該折れ部から上斜め後方に向けて傾斜する傾斜片と、該傾斜片の先端から上方に立ち上がり前記前フランジ部の横桟取付片の後方に相対向配置された立上り部とが形成され、
前記後フランジ部における後側立上り片の先端の折れ部は、前記前フランジ部における前側立上り片の先端の折れ部よりも低い高さ位置に形成され、
かつ、前記後フランジ部における後フランジ部と連結片とが接合する接合面は、前記後側立上り片の先端の折れ部より上方では該折れ部より後方に位置しており、
前記立上り部を地覆部の後端より後方にはみ出させて、前記支柱は地覆部に立設されているので、車両が防護柵の横桟に衝突した際、前記接合面を通じて後フランジ部を後方に押圧する荷重が、該接合面のどの部位においても、折れ部より後方で生じ、折れ部に荷重が集中しやすくなり、前記折れ部を基点とする変形を誘導することができる。 According to the present invention, the front flange portion has a front rising piece fixed to the base portion so that the front surface faces the road, and the front rising portion has a front end as a folding portion, and the front flange portion is obliquely upward and rearward from the folding portion. A front inclined piece that is inclined toward the upper side, and a horizontal beam attaching piece that rises upward from the upper end of the front inclined piece and is attached to the horizontal beam ,
The rear flange portion includes a rear rising piece fixed to the base portion, an inclined piece that is inclined upward and rearward from the bent portion with the tip of the rear rising piece as a bent portion, and the inclined piece a rising portion, which is opposed located behind the transverse桟取with pieces of the front flange portion Ri rising upward from the tip is formed,
The bent portion at the tip of the rear rising piece in the rear flange portion is formed at a lower height than the bent portion at the tip of the front rising piece in the front flange portion,
And bonding surface and the connecting piece and the rear flange portion of the rear flange portion is joined, in the above the broken portion of the distal end of the rear rising piece is located behind the said folding portion,
Since the rising portion protrudes rearward from the rear end of the ground covering portion and the support column is erected on the ground covering portion, when the vehicle collides with a horizontal rail of the protective fence, the rear flange portion is passed through the joint surface. The load that pushes the rearward is generated behind the folded part at any part of the joint surface, and the load is likely to concentrate on the folded part, so that deformation based on the folded part can be induced.

本発明に係る防護柵の第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. 図１のＡ−Ａ拡大断面図である。It is an AA expanded sectional view of FIG. 図１の主要部を示す部分拡大斜視図である。It is a partial expansion perspective view which shows the principal part of FIG. 図１の他の主要部を示す部分拡大斜視図である。It is a partial expansion perspective view which shows the other main part of FIG. 図４の部分分解斜視図である。FIG. 5 is a partially exploded perspective view of FIG. 4. 図２のベース部付近の拡大図である。FIG. 3 is an enlarged view of the vicinity of a base portion in FIG. 2. 図１のＢ−Ｂ拡大断面図である。It is BB expanded sectional drawing of FIG. 本発明に係る防護柵の他の実施形態を示す主要部の拡大断面図である。It is an expanded sectional view of the principal part which shows other embodiment of the protection fence which concerns on this invention. 本発明に係る防護柵の更に他の実施形態を示す主要部の拡大断面図である。It is an expanded sectional view of the principal part which shows other embodiment of the protection fence which concerns on this invention.

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１〜５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は図２の拡大断面図、図３は図１の道路側から見た部分拡大斜視図、図４は道路と反対側から見た部分拡大斜視図、図５は図４の部分分解斜視図である。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Ｂ２を介して地覆部Ｒに固定されている。そして防護柵Ｐは、車両が地覆部Ｒの前端に乗り上げただけでは、衝突しにくくするために、地覆部Ｒの後方寄りに支柱１を固定して横桟２がなるべく後方に配置されるようにしている。（なお、本説明において、道路側を前方、道路と反対側を後方とする。）また支柱１も地覆部Ｒの後方寄りに位置するように、後記する支柱１を地覆部Ｒに固定するためのベース部４の前端よりも後方に横桟２が位置している。 1-5 is explanatory drawing which shows 1st Embodiment in the guard fence P which concerns on this invention, FIG. 1 is a front view, FIG. 2 is an expanded sectional view of FIG. 2, FIG. 3 is from the road side of FIG. FIG. 4 is a partially enlarged perspective view seen from the side opposite to the road, and FIG. 5 is a partially exploded perspective view of FIG. 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 strut 1 is fixed to the ground covering portion R via the anchor bolt B2. In order to make it difficult for the protective fence P to collide only when the vehicle rides on the front end of the ground cover R, the post 1 is fixed to the rear of the ground cover R and the horizontal rail 2 is arranged as far back as possible. I try to do it. (In this description, the road side is the front, and the opposite side of the road is the rear.) Further, the post 1 to be described later is fixed to the ground cover R so that the post 1 is also located behind the ground cover R. The crosspiece 2 is located behind the front end of the base portion 4 for this purpose.

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され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等でもよく、スリーブ２１の断面形状もその形状に合わせて横桟２同士を連結できるものであればよい。 The horizontal rail 2 is constructed 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 is not easily broken. 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. In addition, the cross-sectional shape of the horizontal beam 2 may be rectangular or elliptical, and the cross-sectional shape of the sleeve 21 may be any as long as it can connect the horizontal beams 2 in accordance with the shape.

支柱本体３は、道路側に配置されて横桟２が取付けられる前フランジ部３１と、前フランジ部３１の後方に対向して配置された後フランジ部３２と、前フランジ部３１と後フランジ部３２とを連結する連結片３３とから構成され、これら前フランジ部３１と後フランジ部３２とが連結片３３に溶接によって接合され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、支持部３１ａから横桟２内に挿入されたスリーブ２１に向けて貫通された貫通孔に通された固定ボルトＢ１と、ナットＮ１によって取付けられている。なお前記固定ボルトＢ１は、支持部３１ａを介さずに、スリーブ２１を介して横桟２同士を連結するために用いてもよい。また前記支持部３１ａは、前フランジ部３１と一体に形成されたものでもよく、前フランジ部３１と別体で形成して、溶接等により接合したものでもよい。 The column main body 3 includes a front flange portion 31 that is disposed on the road side and to which the cross rail 2 is attached, a rear flange portion 32 that is disposed opposite to the rear of the front flange portion 31, and the front flange portion 31 and the rear flange portion. The front flange portion 31 and the rear flange portion 32 are joined to and integrated with the connection piece 33 by welding. The front flange portion 31 is provided with a support portion 31a formed to be recessed rearward. The sleeve 2 is brought into contact with the support portion 31a and inserted into the cross beam 2 from the support portion 31a. A fixing bolt B1 passed through a through-hole penetrating toward the end and a nut N1 are attached. The fixing bolt B1 may be used for connecting the cross rails 2 via the sleeve 21, not via the support portion 31a. The support portion 31a may be formed integrally with the front flange portion 31, or may be formed separately from the front flange portion 31 and joined by welding or the like.

また前フランジ部３１は、溶接によってベース部４に接合されて、好適には垂直に立ち上がる前側立上り片３１ｂと、その先端から上斜め後方に向けて傾斜する前側傾斜片３１ｃと、本形態では、その上端から上方に垂直に立ち上がる横桟取付片３１ｄとを備え、横桟取付片３１ｄに横桟２が取付けられる支持部３１ａが設けられている。 In addition, the front flange portion 31 is joined to the base portion 4 by welding, and preferably rises vertically, a front rising piece 31b, a front inclined piece 31c that is inclined obliquely upward and rearward from the tip, and in this embodiment, A horizontal rail mounting piece 31d that rises vertically upward from the upper end thereof is provided, and a support portion 31a to which the horizontal rail 2 is mounted is provided on the horizontal rail mounting piece 31d.

後フランジ部３２は、本形態では、前フランジ部３１より左右方向の幅が短くなされている。そして、ベース部４の後端面に下端部が固定されて、好適には垂直に立ち上がる後側立上り片３２ａと、その先端を折れ部３４として、ここから上斜め後方に向けて傾斜する傾斜片３２ｂとその先端から上方に垂直に立ち上がる立上り部３２ｃとからなる後側屈曲片３２ｄとを形成することにより、折れ部３４より上方に位置する後側屈曲片３２ｄにおける連結片３３との接合面３５を折れ部３４より後方に位置するようにし、さらにその後側屈曲片３２ｄの上端が前側に向けて屈曲されて、前フランジ部３１の背面に接合されている。 In the present embodiment, the rear flange portion 32 is shorter in the left-right direction than the front flange portion 31. Then, a lower end is fixed to the rear end surface of the base portion 4, and preferably a rear rising piece 32a that rises vertically, and an inclined piece 32b that tilts upward and rearward from the front end as a bent portion 34. And a rear bent piece 32d formed of a rising portion 32c that rises vertically upward from the tip thereof, thereby forming a joint surface 35 with the connecting piece 33 in the rear bent piece 32d positioned above the bent portion 34. The upper end of the rear bent piece 32d is bent toward the front side and is joined to the back surface of the front flange portion 31 so as to be positioned rearward of the bent portion 34.

連結片３３は、本形態では、前フランジ部３１と後フランジ部３２との間に配置されて前面側が前フランジ部３１の背面に溶接等によって接合され、背面側が後フランジ部３２の前面に溶接等によって接合されている。 In this embodiment, the connecting piece 33 is disposed between the front flange portion 31 and the rear flange portion 32, the front surface side is joined to the back surface of the front flange portion 31 by welding or the like, and the back surface side is welded to the front surface of the rear flange portion 32. It is joined by etc.

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材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、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 to a steel material that is stable in strength and processed into a suitable shape at a low cost. 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 metal such as an aluminum alloy or a stainless alloy.

支柱１のベース部４は、図３〜７に示すように、地覆部Ｒの後方側であって、該ベース部４の後端が地覆部Ｒの後端からはみ出ないように該地覆部Ｒに固定されている。そして、ベース部４は、横長長方形状であって、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。 As shown in FIGS. 3 to 7, the base portion 4 of the support column 1 is on the rear side of the ground covering portion R so that the rear end of the base portion 4 does not protrude from the rear end of the ground covering portion R. It is fixed to the cover R. And the base part 4 is horizontally long rectangular shape, Comprising: The through-hole 5 is provided in the front left side and the front right side used as the road side, and the back left side and back right side used as the opposite side to a road side.

地覆部Ｒには、アンカーボルトＢ２が設けられ、地覆部Ｒ上に突出するアンカーボルトＢ２が設けられ、その上端のねじ部がベース部４の各貫通孔５を挿通され、スプリングワッシャＷ及び平片状のワッシャＷを介してナットＮ２をベース部４上から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 B2 is provided in the ground cover portion R, and an anchor bolt B2 protruding on the ground cover portion R is provided. A thread portion at the upper end of the ground cover portion R is inserted through each through hole 5 of the base portion 4, and the spring washer W And the base part 4 is fixed on the ground covering part R by tightening the nut N2 from above the base part 4 via the flat piece-like washer W.

アンカーボルトＢ２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。 As long as the anchor bolt B2 can be firmly fixed to the ground covering portion R, the anchor bolt B2 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.

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片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。 In consideration of the strength required to absorb the collision load applied to the column main body 3 and not to break easily when the vehicle collides, the base portion 4 is appropriately made of a steel piece that is stable in strength and inexpensive. What was cut | disconnected to length 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、支柱本体の連結片３３を中央にして左右対称状に配置され、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Ｂ２の位置調整や支柱１の僅かな設置誤差が生じても貫通孔５ａ、５ｂにアンカーボルトＢ２を挿入してナットＮ２等によりベース部４が締結される形態であればよい。 In the present embodiment, the through holes 5a and 5b provided on the front left side and the front right side of the base part 4 are arranged symmetrically with the connecting piece 33 of the column main body as the center, and the protective fence It is a laterally long hole that is long in the lateral direction, which is the longitudinal direction of P. The form of the through holes 5a and 5b is not particularly limited. Even if a slight adjustment error of the position of the anchor bolt B2 or the installation of the support column 1 occurs, the anchor bolt B2 is inserted into the through holes 5a and 5b and the nut N2 or the like. As long as the base part 4 is fastened by the above, it is sufficient.

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の連結片３３を中央にして左右対称状に配置されて、防護柵Ｐの長手方向である横方向に長い横長孔である。そして、貫通孔５ｃ、５ｄは、前フランジ部３１と後フランジ部３２との間で、前記前フランジ側に位置している。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Ｂ２の位置調整や支柱１の僅かな設置誤差が生じても前記貫通孔５ｃ、５ｄにアンカーボルトＢ２を挿入してナットＮ２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 arranged symmetrically with the connecting piece 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 through holes 5 c and 5 d are located on the front flange side between the front flange portion 31 and the rear flange portion 32. The form of the through holes 5c and 5d is not particularly limited. Even if the position adjustment of the anchor bolt B2 or a slight installation error of the column 1 occurs, the anchor bolt B2 is inserted into the through holes 5c and 5d and the nut N2 is inserted. The base part 4 may be in a form that is fastened by, for example.

次に、防護柵Ｐの横桟２に車両が衝突した場合について詳しく説明する。車両が地覆部Ｒ上に乗り上げて、横桟２に衝突した場合、その衝突荷重によって、支柱本体３の前部は上方へ引っ張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。この引張力に対しては、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Ｂ２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。また貫通孔５ｃ、５ｄに挿入されたアンカーボルトＢ２は、前フランジ部３１と後フランジ部３２との間で、前記前フランジ側に位置しているので、前記ベース部４の捲り上がりを更に効果的に抑えることができる。 Next, the case where the vehicle collides with the horizontal rail 2 of the protective fence P will be described in detail. When the vehicle rides on the ground covering portion R and collides with the crosspiece 2, the front load of the column main body 3 is pulled upward by the collision load, and the rear portion of the column main body 3 is pushed downward. A compressive force is generated. With respect to this tensile force, the through holes 5a and 5b of the base part 4 are arranged in front of the lower end of the column body 3 and behind the front end of the base part 4, so It is possible to efficiently suppress the front portion of the base portion 4 from being lifted upward by the anchor bolt B <b> 2 inserted into the hole 5. Further, since the anchor bolt B2 inserted into the through holes 5c and 5d is located on the front flange side between the front flange portion 31 and the rear flange portion 32, the rise of the base portion 4 is further effective. Can be suppressed.

また後フランジ部３２は、後側立上り片３２ａとその先端から上斜め後方に向けて傾斜する後側屈曲片３２ｄとの間に折れ部３４が設けられている。そして、後フランジ部３２
の折れ部３４より上方に位置する後側屈曲片３２ｄにおいては、当該後側屈曲片３２ｄと連結片３３とが接合する接合面３５は、折れ部３４の前後方向の位置Ｘより後方に位置している。すなわち、本形態においては、後フランジ部３２の後側屈曲片３２ｄと連結片３３との接合面３５は、前記折れ部３４からその上端にわたって、折れ部３４と同じ位置かそれよりも後方に位置している。 Further, the rear flange portion 32 is provided with a bent portion 34 between a rear rising piece 32a and a rear bent piece 32d inclined upward and rearward from the tip thereof. And the rear flange part 32
In the rear bent piece 32d located above the bent portion 34, the joint surface 35 where the rear bent piece 32d and the connecting piece 33 are joined is located behind the position X in the front-rear direction of the bent portion 34. ing. That is, in the present embodiment, the joint surface 35 between the rear bent piece 32d of the rear flange portion 32 and the connecting piece 33 is located at the same position as or behind the bent portion 34 from the bent portion 34 to the upper end thereof. doing.

これにより、車両が横桟２に衝突した際、横桟２から前フランジ部３１、連結片３３を経て後フランジ部３２を後方に押圧する荷重が掛かるが、前記荷重は、折れ部３４より上方では、該接合面３５のどの部位においても、折れ部３４より後方で生じるため、折れ部３４に荷重が集中しやすくなり、折れ部３４を基点とする変形を誘導することができる。 As a result, when the vehicle collides with the horizontal beam 2, a load is applied from the horizontal beam 2 to push the rear flange portion 32 rearward through the front flange portion 31 and the connecting piece 33, but the load is above the folding portion 34. Then, since any part of the joint surface 35 occurs behind the bent portion 34, the load is likely to concentrate on the bent portion 34, and deformation based on the bent portion 34 can be induced.

前側立上り片３１ｂの前面は、ベース部４の先端から前後方向の寸法Ｙの２分の１以上奥になるように位置するのが好ましい。これにより、車両が横桟２に衝突した際、支柱本体３の前部は前方に引っ張られても、ベース部４の前部は捲り上げられにくくなる。また、ベース部４の肉厚を通常（１６ｍｍ）より厚くして（１９ｍｍ）、前フランジ部３１の肉厚（６ｍｍ）の３倍以上となされている。これにより、前フランジ部３１が固定されたベース部４の中央部も捲り上がられにくくなる。更に、後フランジ部３２の後側立上り片３２ａは、ベース部４の後端面に下端部が溶接により接合されている。これにより、後フランジ部３２をより後方に固定することが可能となり、またベース部４との接合強度を増すことができる。 The front surface of the front rising piece 31b is preferably positioned so as to be at least one half of the dimension Y in the front-rear direction from the tip of the base portion 4. Thereby, when the vehicle collides with the crosspiece 2, even if the front part of the column main body 3 is pulled forward, the front part of the base part 4 is hardly lifted. Further, the thickness of the base portion 4 is set to be greater than normal (16 mm) (19 mm), and is more than three times the thickness (6 mm) of the front flange portion 31. Thereby, it becomes difficult to turn up the center part of the base part 4 to which the front flange part 31 is fixed. Further, the rear rising piece 32a of the rear flange portion 32 has a lower end portion joined to the rear end surface of the base portion 4 by welding. Thereby, it becomes possible to fix the rear flange part 32 to the back, and the joint strength with the base part 4 can be increased.

これらによって、比較的狭い地覆部Ｒに防護柵Ｐを取付ける場合であっても、防護柵Ｐの横桟２を道路側から離れた地覆部Ｒの後側に横桟２を取付ける支柱１を安定的に固定することができる。 Thus, even when the protective fence P is attached to the relatively narrow ground covering portion R, the column 1 for attaching the horizontal rail 2 to the rear side of the ground covering portion R away from the road side. Can be stably fixed.

図８は、それぞれ本発明に係る防護柵Ｐの変形を示す側面図である。本形態に係る防護柵Ｐは、図１〜７に示された防護柵Ｐに比べて、主に支柱本体３の前フランジ部３１及び後フランジ部３２が異なるものであるが、他は同様な形態である。 FIG. 8 is a side view showing a modification of the protective fence P according to the present invention. The guard fence P according to the present embodiment is mainly different from the guard fence P shown in FIGS. 1 to 7 in that the front flange portion 31 and the rear flange portion 32 of the column main body 3 are different, but the others are the same. It is a form.

すなわち、図８に示された防護柵Ｐにおいては、前フランジ部３１は、図１〜６に示された形態と同様であるが、後フランジ部３２において、前記後側屈曲片３２ｄの代わりに後側立上り片３２ａの上端から後方に向けて張り出して湾曲する後側湾曲片３６を備えるものであって、この点が異なるが、折れ部３４より上方に位置する後側湾曲片３６においても、当該後側湾曲片３６と連結片３３とが接合する接合面３５は、折れ部３４の前後方向の位置Ｘより後方に位置しているものであり、後フランジ部３２において、折れ部３４より上方の連結片３３と接合する接合面３５が、折れ部３４の前後方向の位置Ｘより後方に位置している点においては、図１〜７に示された形態と同様である。 That is, in the protective fence P shown in FIG. 8, the front flange portion 31 is the same as that shown in FIGS. 1 to 6, but in the rear flange portion 32, instead of the rear bent piece 32 d. The rear side bending piece 36 is provided with a rear side bending piece 36 that protrudes and curves backward from the upper end of the rear side rising piece 32a, and in this respect, the rear side bending piece 36 positioned above the folding portion 34 is also provided. The joining surface 35 where the rear curved piece 36 and the connecting piece 33 are joined is located behind the position X in the front-rear direction of the folded portion 34, and above the folded portion 34 in the rear flange portion 32. In the point which the joint surface 35 joined to the connection piece 33 of this is located behind the position X of the front-back direction of the bending part 34, it is the same as that of the form shown by FIGS.

また図９に示された防護柵Ｐは、前フランジ部３１が、前側立上り片３１ｂと、その上端から後方に向けて張り出して湾曲する前側湾曲片３７とを備え、該前側湾曲片３７に横桟２が取付けられる支持部３７ａが設けられている。また後フランジ部３２は、図８に示された防護柵Ｐと同様に、後側立上り片３２ａと、その上端から後方に向けて張り出して湾曲する後側湾曲片３６とを備えており、この点が異なるものであるが、後フランジ部３２において、折れ部３４より上方の連結片３３と接合する接合面３５が、折れ部３４の前後方向の位置Ｘより後方に位置している点においては、図１〜７に示された形態及び図８に示された形態と同様である。 Further, the protective fence P shown in FIG. 9 includes a front flange portion 31 that includes a front rising piece 31b and a front curved piece 37 that protrudes and curves backward from the upper end thereof. A support portion 37a to which the crosspiece 2 is attached is provided. Further, the rear flange portion 32 includes a rear rising piece 32a and a rear curved piece 36 that protrudes and curves backward from the upper end of the rear flange piece 32a, similarly to the protective fence P shown in FIG. Although the points are different, in the rear flange portion 32, the joining surface 35 that joins the connecting piece 33 above the folding portion 34 is located behind the position X in the front-rear direction of the folding portion 34. These are the same as the embodiment shown in FIGS. 1 to 7 and the embodiment shown in FIG.

この図８−９に示すように、前フランジ部３１及び後フランジ部３２の形態は、本発明の目的を達成する範囲であれば、適宜変更してもよい。 As shown in FIG. 8-9, the form of the front flange portion 31 and the rear flange portion 32 may be appropriately changed as long as the object of the present invention is achieved.

１支柱
２横桟
２１スリーブ
３支柱本体
３１前フランジ部
３１ａ支持部
３１ｂ前側立上り片
３１ｃ前側傾斜片
３１ｄ横桟取付片
３２後フランジ部
３２ａ後側立上り片
３２ｂ傾斜片
３２ｃ立上り部
３２ｄ後側屈曲片
３３連結片
３４折れ部
３５接合面
３６後側湾曲片
３７前側湾曲片
３７ａ支持部
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
Ｂ１固定ボルト
Ｂ２アンカーボルト
Ｃ挿入孔
Ｌ前後方向中央線
Ｎ１、Ｎ２ナット
Ｒ地覆部
Ｐ防護柵
Ｓスプリングワッシャ
Ｗワッシャ
Ｘ前後方向の寸法
Ｙ前後方向の位置 1 strut 2 rungs 21 sleeve 3 strut body 31 before the flange portion 31a supporting portion 31b front rise portion 31c front inclined piece 31d transverse桟取with piece 32 after the flange portion 32a rear rising piece 32b inclined piece 32c standing up portion 32d rear flexion Piece 33 Connecting piece 34 Folded portion 35 Joint surface 36 Rear curved piece 37 Front curved piece 37a Support portion 4 Base portion 5 Through hole 5a, 5b, 5c, 5d Through hole 6 Rebar 7 Reinforcement member 8 Through hole B1 Fixing bolt B2 Anchor Bolt C Insertion hole L Front / rear center line N1, N2 Nut R Ground cover P Guard fence S Spring washer W Washer X Front / rear dimension Y Front / rear position

Claims

A protective fence in which a horizontal beam is attached between columns that are erected on the ground covering portion on the side edge of the road, and the column includes a front flange portion to which the horizontal beam is mounted, and a rear side of the front flange portion. A strut body provided with a rear flange portion arranged opposite to each other, a connecting piece for connecting the front flange portion and the rear flange portion, and the strut body is fixed to the ground cover portion by an anchor bolt. With a base,
The front flange portion includes a front rising piece fixed to the base portion so that the front surface faces the road, and a front side inclined obliquely upward and rearward from the folding portion with the front end of the front rising piece as a bent portion. An inclined piece and a horizontal beam attaching piece on which the horizontal beam is raised upward from the upper end of the front inclined piece are formed ,
The rear flange portion includes a rear rising piece fixed to the base portion, an inclined piece that is inclined upward and rearward from the bent portion with the tip of the rear rising piece as a bent portion, and the inclined piece a rising portion, which is opposed located behind the transverse桟取with pieces of the front flange portion Ri rising upward from the tip is formed,
The bent portion at the tip of the rear rising piece in the rear flange portion is formed at a lower height than the bent portion at the tip of the front rising piece in the front flange portion,
And bonding surface and the connecting piece and the rear flange portion of the rear flange portion is joined, in the above the broken portion of the distal end of the rear rising piece is located behind the said folding portion,
A protective fence characterized in that the upright portion protrudes rearward from the rear end of the ground covering portion, and the support column is erected on the ground covering portion.