JP3003013U - Fall prevention fence for pipe work - Google Patents

Abstract

(57)【要約】 【目的】 取付・取り外しが簡単で種々の寸法の土留め
壁に対応可能な安全性に優れた管工事用転落防止柵を提
供する。 【構成】 管工事用転落防止柵３０は、短辺部５と長辺
部６からなるＬ字形管Ａ、Ｂ二つを平行に向き合う短辺
部５同志の距離（即ち柵３０の幅）ｓが１．７〜２．５
ｍの範囲で長辺部６が摺動自在且つ任意の位置で固定可
能となるように連結するとともに、前記二つのＬ字形管
の短辺部５端に各々摺動自在且つ固定可能な管７を挿入
し、さらに一方のＬ字形管Ａの角部８に長さが所定の範
囲で自在に調節できるつなぎ用管９を回動自在に連結す
るとともに該つなぎ管９の先端に角度自在の連結フック
１２を配した構成である。 (57) [Summary] [Purpose] To provide a fall prevention fence for pipe work that is easy to install and remove and can be applied to earth retaining walls of various sizes with excellent safety. [Structure] The fall prevention fence 30 for pipe work is a distance (that is, the width of the fence 30) s between the short sides 5 that face two L-shaped tubes A and B in parallel, each of which is composed of a short side 5 and a long side 6. Is 1.7 to 2.5
The long side portion 6 is slidably connected within a range of m so that the long side portion 6 can be fixed at any position, and the slidable and fixable pipes 7 are respectively attached to the short side portion 5 ends of the two L-shaped pipes. , And a connecting pipe 9 whose length can be freely adjusted within a predetermined range is rotatably connected to the corner portion 8 of one L-shaped pipe A, and the connecting pipe 9 is connected to the tip end of the connecting pipe 9 at an angle. The hook 12 is arranged.

Description

【考案の詳細な説明】[Detailed description of the device]

【０００１】[0001]

【産業上の利用分野】[Industrial applications]

本考案は、上下水道工事等の管工事を行う際に掘られた掘削溝の両側面を土留 めする土留め壁（あるいは山留め壁とも称される）上に設ける保安上の転落防止 柵の構造に関し、特に取付・取り外しが簡単で種々の土留め壁寸法に対応可能な 管工事用転落防止柵（以下、単に柵とも称す）に関するものである。 The present invention is a structure of a fall-prevention fence for security provided on an earth retaining wall (also referred to as a mountain retaining wall) that retains both sides of excavated trenches when performing pipe work such as water supply and sewerage work. In particular, the present invention relates to a pipe fall prevention fence (hereinafter also simply referred to as a fence) that can be easily attached and removed and can be used for various earth retaining wall dimensions.

【０００２】[0002]

【従来の技術】[Prior art]

上水道・下水道工事、ガス管埋設工事、地中線埋設工事、その他道路上等の管 工事現場における掘削工事の際には、掘削が進むにつれて土圧が壁面にかかり、 これが土のせん断抵抗力を越えると壁面崩壊が生じる。 During waterworks / sewerage works, gas pipe burial work, underground line burial work, and other excavation work at road construction sites such as roads, earth pressure is applied to the wall surface as the excavation progresses, which increases the shear resistance of soil. If it exceeds, wall collapse will occur.

【０００３】 したがって、上記管工事の際には、必ず土留め壁（山留め壁）と呼ばれる壁で 側面を囲み、場合によっては切梁と呼ばれるつっかい棒で土留め壁を押さえなが ら、掘削を行い掘削溝を構築することになっている。Therefore, at the time of the pipe work, the side surface is always surrounded by a wall called a retaining wall (mounting wall), and in some cases, the retaining wall is pressed by a big rod called a cut beam to perform excavation. It is supposed to do and build a trench.

【０００４】 管工事は掘削溝が長さ２０〜３０メートルの単位で構築され、その場所の工事 が終了すれば順次工事場所を移動して掘削溝が構築される。In the pipe work, the excavation groove is constructed in units of 20 to 30 meters in length, and when the construction at that location is completed, the excavation groove is constructed by sequentially moving to the construction location.

【０００５】 上記土留め壁の構築はシートパイル（矢板）を連続的に打ち込んで隙間のない 土留め壁を構築する方法やＨ鋼などの親杭を等間隔に打ち込み、その間に横矢板 を数枚水平に挿入する方法が採られる。The construction of the earth retaining wall is a method of continuously driving sheet piles (sheet piles) to construct an earth retaining wall without a gap, or driving parent piles of H steel or the like at equal intervals, and inserting horizontal sheet piles between them. The method of inserting the sheets horizontally is adopted.

【０００６】 通常の管工事の場合は、深さ１〜３メートルの掘削溝なので簡単な後者の土留 め壁構築方法が一般的である。[0006] In the case of ordinary pipe construction, the latter earth retaining wall construction method is simple because it is an excavation groove having a depth of 1 to 3 meters.

【０００７】 図３は上記後者の掘削溝の構成を説明するための横断断面図であって、図のよ うにＨ鋼の親杭１を等間隔に打ち込んで横矢板（鋼板）２ａ、２ｂ、２ｃを順次 挿入して土留め壁３が構築される。FIG. 3 is a transverse cross-sectional view for explaining the structure of the latter excavation groove. As shown in the drawing, the H steel parent piles 1 are driven at equal intervals and the horizontal sheet piles (steel plates) 2a, 2b, The earth retaining wall 3 is constructed by sequentially inserting 2c.

【０００８】 上記土留め壁３の地上高ｈは作業者の安全確保のため地上より数十センチの高 さまで横矢板２を設けておくのが望ましく、且つ土留め壁の上方には４〜５メー トルのパイプ２４を立杭（パイプ）２３に横架した工事用手摺りが設けられる。It is desirable that the horizontal sheet pile 2 be provided up to a height of several tens of centimeters above the ground so as to ensure the safety of workers, and the height of the earth retaining wall 3 is 4 to 5 above the earth retaining wall. A handrail for construction is provided in which a pipe 24 of a meter is laid horizontally on a vertical pile (pipe) 23.

【０００９】 この際、上記パイプ２４同志及び立杭２３との連結にはパイプ連結金具２５が 用いられる。At this time, a pipe connecting fitting 25 is used to connect the pipes 24 and the vertical piles 23.

【００１０】 また、日々の作業終了後の夜間は通行人が誤って工事途中の掘削溝に落ちない ように網を掘削溝開口面上に張るように行政サイドの指導が行われている。Further, at night after the completion of daily work, the administrative side is instructing the passerby to stretch a net on the opening surface of the excavation groove so that the passerby does not accidentally fall into the excavation groove under construction.

【００１１】 上記横矢板２には通常、鋼板が用いられ、人力では持ち上げられない程度に重 いので親杭１間への挿入は逐一クレーンによる吊り上げによって行う。Normally, a steel plate is used for the horizontal sheet pile 2 and it is so heavy that it cannot be lifted by human power, so that it is inserted between the main piles 1 one by one by lifting by a crane.

【００１２】[0012]

【考案が解決しようとする課題】[Problems to be solved by the device]

しかしながら、上記横矢板（鋼板）２の挿入、取り外し作業はクレーンを使っ た時間を要する面倒な作業のため、得てして上端の落下防止柵となる横矢板２ｃ を挿入しない状態で工事が行われることがあり、保安上問題がある。 However, the work of inserting and removing the horizontal sheet pile (steel plate) 2 is time-consuming and tedious work using a crane, and therefore the work may be performed without inserting the horizontal sheet pile 2c, which is a top fall prevention fence. Yes, there is a security problem.

【００１３】 また、上記パイプ連結による工事用手摺りの設置も面倒であり、パイプ２４の つなぎ目の段差や立杭２３とのパイプ連結金具２５部分が出っ張っているため、 資材運搬作業中等に引掛かって転倒しやすいという危険があった。Further, it is troublesome to install a handrail for construction by the above-mentioned pipe connection, and since the step difference of the joint of the pipe 24 and the pipe connecting metal fitting 25 portion with the vertical pile 23 are protruding, they are caught during the material transportation work or the like. There was a danger of falling easily.

【００１４】 また、夜間の落下防止網を土留め壁３の上に覆い張設するのも手間の掛かる作 業である。Further, it is a labor-intensive operation to cover the earth retaining wall 3 with a fall prevention net at night.

【００１５】 この点、取付・取り外しの簡単な落下防止のための柵ないし手摺りがあれば便 利であるが未だそのような柵は無い。In this respect, it is convenient if there is a fence or a handrail for easy fall and fall that can be easily attached and detached, but there is no such fence yet.

【００１６】 蓋し、前記土留め壁３として用いられる横矢板２の寸法その他の規格は種々存 在し、また掘削溝の深さによって地上に出る上端の横矢板２ｃの地上高ｈも変化 するので、種々の条件下の管工事現場において保安上最適な落下防止柵ないし手 摺りを設けることは難しい。There are various dimensions and other specifications of the horizontal sheet pile 2 used as the earth retaining wall 3 for the lid, and the ground height h of the upper horizontal sheet pile 2c exposed to the ground changes depending on the depth of the excavation groove. Therefore, it is difficult to install a fall prevention fence or handrail that is optimal for safety at the pipe construction site under various conditions.

【００１７】 本考案は上記事情に鑑みてなされたものであり、簡単に取付・取り外しが可能 で、且つ種々の規格の横矢板にも自在に対応でき、落下防止手摺りとしても最適 な構成に設置できる保安上の問題を解決した管工事用転落防止柵を提供するもの である。The present invention has been made in view of the above circumstances, and can be easily attached and detached, and can be freely adapted to various standard horizontal sheet piles, and is also an optimal structure as a fall prevention handrail. It provides a fall prevention fence for pipe work that can be installed and solves the security problem.

【００１８】[0018]

【課題を解決するための手段】[Means for Solving the Problems]

本考案は、 （１）短辺部と長辺部からなるＬ字形管二つを平行に向き合う短辺部の距離が１ ．７〜２．５ｍの範囲で長辺部が摺動自在且つ任意の位置で固定可能となるよう に連結するとともに、前記二つのＬ字形管の短辺部端に各々摺動自在且つ固定可 能な管を挿入し、さらに一方のＬ字形管の角部に長さが所定の範囲で自在に調節 できるつなぎ用管を回動自在に連結するとともに該管の先端に角度自在の連結フ ックを配したことを特徴とする管工事用転落防止柵を提供することにより上記目 的を達成するものである。 The present invention is as follows: (1) The distance between the short sides of two L-shaped tubes having short sides and long sides facing in parallel is 1. The long side is slidable within the range of 7 to 2.5 m and is connected so that it can be fixed at any position, and it can be slidably fixed to the ends of the short sides of the two L-shaped tubes. A connecting pipe whose length can be freely adjusted within a predetermined range at the corner of one L-shaped pipe, and which is pivotally connected to the tip of the pipe. The above objective is achieved by providing a fall prevention fence for pipe work, which is characterized by the arrangement of

【００１９】 （２）また、前記Ｌ字形管二つを連結したコの字形管の内側に矩形状枠に張られ た金網を複数のフックにて張設した構造を特徴とする上記（１）記載の管工事用 転落防止柵を提供することにより上記目的を達成するものである。(2) Further, the above-mentioned (1) is characterized in that a wire net stretched in a rectangular frame is stretched by a plurality of hooks inside a U-shaped pipe connecting the two L-shaped pipes. The above purpose is achieved by providing the above-mentioned fall prevention fence for pipe work.

【００２０】[0020]

【作用】[Action]

本考案における管工事用転落防止柵では、横矢板（通常は鋼板ないし軽量鋼板 その他の金属板）の厚さ方向の側面に間隔ｘで設けられた直径６〜７ｃｍ程度の 孔にＬ字形管の短辺側を各々挿入する。この際、上記左右の間隔ｘは横矢板の幅 寸法や製造メーカーによって異なる場合があるが、連結された長辺の管の摺動部 分の長さを調節・固定することにより適宜各仕様に合わせることが簡単にできる 。 In the fall prevention fence for pipe work according to the present invention, an L-shaped pipe is formed in a hole having a diameter of 6 to 7 cm provided at a distance x on the side surface in the thickness direction of a horizontal sheet pile (usually a steel plate or a light steel plate or other metal plate). Insert each short side. At this time, the above-mentioned space x on the left and right may differ depending on the width dimension of the horizontal sheet pile and the manufacturer, but by adjusting and fixing the length of the sliding part of the connected long side pipe, it can be adjusted to each specification as appropriate. Easy to match.

【００２１】 また、前記横矢板から立設する本管工事用転落防止柵の高さは適当な寸法にな るように短辺の摺動管を摺動・固定することにより、上端の横矢板の地上からの 高さが如何なる場合でも対応可能となる。Further, by sliding and fixing a sliding pipe on the short side so that the height of the fall prevention fence for main pipe work standing upright from the horizontal sheet pile is an appropriate size, a horizontal sheet pile at the upper end is formed. It will be possible to deal with any height above the ground.

【００２２】 一方、親杭を挟んだ隣の横矢板に立設された本管工事用転落防止柵とはつなぎ 用管によって連結して親杭の上方域をも柵が横架されるので隙間の無い一連の柵 となる。On the other hand, since the fence is horizontally installed in the upper area of the parent pile by connecting it with the fall prevention fence for main work that is erected on the adjacent side sheet pile across the parent pile by the connecting pipe. It becomes a series of fences without.

【００２３】 この際、上記つなぎ用管は摺動する二本の管で構成されており、長さが所定の 範囲で伸縮自在に調節できる。したがって、親杭の幅や横矢板の孔の位置による 長さの変動に対して適宜調整できる。At this time, the connecting pipe is composed of two sliding pipes, and the length of the connecting pipe can be adjusted so as to extend and contract within a predetermined range. Therefore, the width of the main pile and the change in length depending on the position of the hole in the transverse sheet pile can be appropriately adjusted.

【００２４】 さらに、前記Ｌ字形管二つを連結した管工事用転落防止柵はコの字形となるが 、この柵の内側に矩形状枠に張られた金網を複数のフック（手鈎）にてＬ字形管 に張設すればより十分な転落防止の効果が得られる。Furthermore, the fall prevention fence for pipe work that connects the two L-shaped pipes has a U-shape, but a wire mesh stretched in a rectangular frame inside the fence is used as a plurality of hooks (hooks). If it is stretched over an L-shaped pipe, a more sufficient fall prevention effect can be obtained.

【００２５】 上記金網の柵への取付はフックによって極めて簡単迅速にできる。The attachment of the wire mesh to the fence can be performed very easily and quickly by the hook.

【００２６】 作業終了後の夜間に通行人が誤って掘削溝に落ちないように掘削溝開口面全体 を覆う網を覆設する場合に、上記、Ｌ字形管の水平な長辺部に網の端部を巻き付 けるだけで簡単に覆設作業が終了するので作業が極めて楽になる。When a net covering the entire opening surface of the excavation trench is covered so that a passerby does not fall into the excavation trench by mistake at night after the work is completed, the net is attached to the horizontal long side of the L-shaped pipe as described above. Since the covering work can be completed simply by wrapping the ends, the work is extremely easy.

【００２７】[0027]

【実施例】【Example】

本考案の管工事用転落防止柵に関する実施例を図１及び図２に基いて説明する 。 An embodiment of a fall prevention fence for pipe work according to the present invention will be described with reference to FIGS. 1 and 2.

【００２８】 図１は本考案に係わる管工事用転落防止柵の構造及び設置状態を説明するため の正面図であり、図２は同隣合う管工事用転落防止柵同志のつなぎ管による連結 状態を示す部分拡大斜視図である。FIG. 1 is a front view for explaining the structure and installation state of a pipe work fall prevention fence according to the present invention, and FIG. 2 is a state in which the adjacent pipe work fall prevention fences are connected by connecting pipes. It is a partial enlarged perspective view showing.

【００２９】 図１において、管工事用転落防止柵３０は、短辺部５と長辺部６からなるＬ字 形管Ａ、Ｂ二つを平行に向き合う短辺部５同志の距離（即ち柵３０の幅）ｓが１ ．７〜２．５ｍの範囲で伸縮自在となるように、長辺部６が摺動自在且つ任意の 位置で固定可能となるように連結するとともに、前記二つのＬ字形管の短辺部５ 端に各々摺動自在且つ固定可能な管７を挿入し、さらに一方のＬ字形管（図中Ａ ）の角部８に長さが所定の範囲で自在に調節できるつなぎ用管９を回動自在に連 結するとともに該つなぎ管９の先端に角度自在の連結フック１２を配したことを 特徴とする。In FIG. 1, the pipe work fall prevention fence 30 is a distance (that is, fence) between the short side portions 5 in which the two L-shaped pipes A and B having the short side portions 5 and the long side portions 6 face each other in parallel. 30 width) s is 1. The long side 6 is slidably connected so that it can be expanded and contracted in the range of 7 to 2.5 m and can be fixed at any position, and the short side 5 ends of the two L-shaped tubes are connected. A slidable and fixable tube 7 is inserted into each of the two, and a connecting tube 9 whose length can be freely adjusted within a predetermined range is pivotally attached to a corner portion 8 of one L-shaped tube (A in the figure). It is characterized in that a connecting hook 12 that is connected to the connecting pipe 12 and is freely angled is provided at the tip of the connecting pipe 9.

【００３０】 上記各部材について詳述すると、先ず短辺部５と長辺部６からなるＬ字形管Ａ 、Ｂは直径４５ｍｍ程度の鋼管であって一方のＬ字形管Ｂの長辺部６の先端には 他方のＬ字形管Ａの長辺部６の内面と摺動する内管１４が固着されている。Explaining each member in detail, first, the L-shaped pipes A 1 and B 2 each having a short side portion 5 and a long side portion 6 are steel pipes having a diameter of about 45 mm. An inner pipe 14 that slides on the inner surface of the long side portion 6 of the other L-shaped pipe A is fixed to the tip.

【００３１】 また、Ｌ字形管Ａの長辺部６端にはボルト止め１５ａが配設されており、当該 横矢板２の孔４の間隔ｘに合わせて柵３０の幅ｓを伸縮自在に設定して固定でき るのである。A bolt stop 15a is provided at the end of the long side portion 6 of the L-shaped tube A, and the width s of the fence 30 is set to be expandable and contractable in accordance with the interval x of the holes 4 of the transverse sheet pile 2. Can be fixed.

【００３２】 この点、どのような規格寸法の横矢板２にも厚み側の側面には直径６〜７ｃｍ 程度の孔４が数カ所配設されているのが通常であり、その距離ｘは概ね１．８〜 ２．３ｍの範囲にあるので種々の寸法の横矢板に対応可能である。In this respect, it is usual that the horizontal sheet pile 2 of any standard size is provided with several holes 4 having a diameter of about 6 to 7 cm on the side surface on the thickness side, and the distance x is approximately 1 Since it is in the range of 0.8 to 2.3 m, it can be applied to various size sheet piles.

【００３３】 一方、本柵３０の二つのＬ字形管Ａ、Ｂの各短辺部５端に各々摺動自在且つ固 定可能な管７（上記孔４よりも大きい径の鍔１０を有する）が挿入されていて、 これを適当な長さに調節してボルト止め１５ｂによって固定し、上端の横矢板２ の孔４に鍔１０まで差し込めば最適の高さの落下防止用柵が立設されることにな る。即ち、掘削溝の深さによって横矢板の挿入による土留め壁の地上高はまちま ちとなるが、本柵３０は前述のように高さ調整ができるので安全上必要な高さの 柵が簡単に施工できるのである。On the other hand, a pipe 7 (which has a collar 10 having a diameter larger than that of the hole 4) is slidable and fixed at each end of each short side 5 of the two L-shaped pipes A and B of the main fence 30. Is inserted, adjust it to an appropriate length, fix it with bolts 15b, and insert it up to the collar 10 in the hole 4 of the horizontal sheet pile 2 at the upper end to set up a fall prevention fence of optimum height. It will be. That is, depending on the depth of the excavation trench, the height of the earth retaining wall due to the insertion of the horizontal sheet pile will be different. It can be installed.

【００３４】 次に、図２の部分拡大斜視図が示すように、当該柵３０ａの隣に立設された柵 ３０ｂとの連結は前記つなぎ用９を横架して連結されるが、つなぎ用管９も内面 に摺動する内管１６が収まった所謂二重管であり、同じくボルト止め１５ｃによ って長さ調整、固定ができるようになっている。Next, as shown in the partially enlarged perspective view of FIG. 2, the connection with the fence 30b which is erected next to the fence 30a is performed by horizontally connecting the above-mentioned joints 9. The pipe 9 is also a so-called double pipe in which an inner pipe 16 that slides on the inner surface is housed, and similarly, the length can be adjusted and fixed by a bolt stop 15c.

【００３５】 このつなぎ用管９は自身の端部に穿設した穴とＬ字形管の角部８に穿設した穴 とに挿通したリング２０にて矢印の如く回動自在に連結されている。そして、連 結しない状態では自重によって垂直にＬ字形管の短辺部５に平行に添う形となる 。The connecting pipe 9 is rotatably connected as shown by an arrow by a ring 20 inserted through a hole formed at its end and a hole formed at the corner 8 of the L-shaped pipe. . And, in the state where they are not connected, the shape is such that they vertically follow the short side portion 5 of the L-shaped tube by their own weight.

【００３６】 また、上記内管１６先端には角度自在に連結された（所謂ユニバーサルジョイ ント１３である）連結フック１２（手錠の如く管の両脇を挟持する鈎）が配設さ れており、これによって隣接する柵３０ｂの連接部１７に接着固定される。Further, a connecting hook 12 (a so-called universal joint 13) that is angularly connected (a hook that holds both sides of the tube like a handcuff) is provided at the tip of the inner tube 16. By this, it is adhesively fixed to the connecting portion 17 of the adjacent fence 30b.

【００３７】 この際、上記連結フック１２によって接着固定される柵の連接部１７はＬ字形 管の水平な長辺部６より管径寸法だけ低い高さになるように折曲されているのが 望ましい。これによってつなぎ用管９による連結部分の高さが柵３０と同じにな り段差の無い一連の柵ないし手摺りとなる。At this time, the connecting portion 17 of the fence, which is adhesively fixed by the connecting hook 12, is bent to have a height lower than the horizontal long side portion 6 of the L-shaped pipe by the pipe diameter dimension. desirable. As a result, the height of the connecting portion by the connecting pipe 9 becomes the same as that of the fence 30, and a series of steps or rails without steps is formed.

【００３８】 したがって、この場合は出っ張りが殆ど無いので資材運搬作業中等に資材や作 業者が引掛かることはない。（この点、ボルト止め１５ｃは図２のようにつなぎ 用管９の上側でなく下側に配置するのがより好ましいと考えられる。） 次に、前記Ｌ字形管二つを連結したコの字形状の管（柵ないし手摺り）の内側 に矩形状枠に張られた金網１８を複数のフック１９にて張設した構造の管工事用 転落防止柵３０では、更に安全性が向上することは云うまでもない。Therefore, in this case, since there is almost no protrusion, the material and the operator are not caught during the material transportation work. (In this respect, it is more preferable that the bolt stop 15c is arranged not on the upper side of the connecting pipe 9 but on the lower side thereof as shown in FIG. 2.) Next, the U-shape connecting the two L-shaped pipes The safety is further improved in the pipe fall prevention fence 30 having a structure in which a wire net 18 stretched in a rectangular frame is stretched by a plurality of hooks 19 inside a shaped pipe (fence or handrail). Needless to say.

【００３９】 上記金網１８は鋼製でもよいが、軽量なアルミ合金製が望ましい。またフック １９は金属製ないし堅牢なＡＢＳやＰＢＴ等の合成樹脂製ないし繊維強化プラス チック製でもよい。また、金網１８の下側には平板２１が設けられ、図１のよう に『安全第一』や社名『ＧＫＳ』を付記してもよい。また、上記平板２１の代わ りに人が抜けられない程度の幅（２０ｃｍ以下）の隙間を設けておけば、掘削溝 内の作業者と道路上の作業者との工具その他小さな資材のやり取りができるので 便利であろう。The metal net 18 may be made of steel, but is preferably made of a lightweight aluminum alloy. Further, the hook 19 may be made of metal or a synthetic resin such as ABS or PBT which is robust, or a fiber reinforced plastic. Further, a flat plate 21 is provided on the lower side of the wire net 18, and “Safety First” or company name “GKS” may be added as shown in FIG. In addition, if a gap (20 cm or less) is provided in place of the flat plate 21 so that a person cannot slip out, tools and other small materials can be exchanged between the worker in the excavation trench and the worker on the road. It will be convenient because you can.

【００４０】 また、向き合う短辺部５同志に長さ調整可能なブレース２７を横架しておくこ とにより距離ｓを常時一定に保つことが望ましい。In addition, it is desirable to keep the distance s constant at all times by laterally arranging a brace 27 whose length can be adjusted on the opposing short sides 5.

【００４１】 以上のような構成の本管工事用転落防止柵３０においては、夜間に一般通行人 が誤って掘削溝に落ちないように、掘削溝の開口面全体を覆う転落防止網を覆設 することが望まれるが、この作業も従来は横矢板への網の取付が面倒であったの が、本柵ではＬ字形管の水平な長辺部６に網の端部を巻き付けるだけで簡単に取 り付けられるので極めて該作業が楽になるという利点がある。In the fall prevention fence 30 for the main construction constructed as described above, a fall prevention net covering the entire opening surface of the excavation groove is provided so as to prevent a general passerby from accidentally falling into the excavation groove at night. Although it was desirable to do this work, it was troublesome to attach the net to the horizontal sheet pile in the past, but with this fence, it is easy to wind the end of the net around the horizontal long side 6 of the L-shaped pipe. It has the advantage that it is extremely easy to carry out the work.

【００４２】 尚、念のために付言すれば、上記Ｌ字形管Ａ、Ｂ、つなぎ用管９、管７は安全 上使用に耐え得る堅牢さを有するものであればよく、鋼管のみならず軽量鋼管や アルミ合金管であっても何等問題は無いであろう。In addition, as a precautionary note, the L-shaped pipes A and B, the connecting pipe 9, and the pipe 7 may be any one that is robust enough to be used for safety, and is not only a steel pipe but also lightweight. Even steel pipes and aluminum alloy pipes will not cause any problems.

【００４３】 また、前記伸縮自在の各管を固定するためのボルト止め１５ａ〜１５ｃはこの 手段に限定されるものではなく、例えば内側の管に多数の溝を刻設し、この溝に 係止する爪及び該爪を付勢するバネを外側の管に設ける手段でもよい。Further, the bolts 15a to 15c for fixing the respective expandable and contractible tubes are not limited to this means, and for example, a large number of grooves are engraved on the inner tube and locked in these grooves. It is also possible to use a means for providing an outer tube with a claw that operates and a spring that biases the claw.

【００４４】[0044]

【考案の効果】[Effect of device]

本考案に係わる管工事用転落防止柵は、上記のように構成されているため、以 下に記載するような効果を有する。 Since the fall prevention fence for pipe work according to the present invention is configured as described above, it has the following effects.

【００４５】 （１）簡単な施工で有効な転落防止柵が構築できるという優れた効果を有する 。(1) It has an excellent effect that an effective fall prevention fence can be constructed by simple construction.

【００４６】 （２）種々の寸法の横矢板に対しても摺動部によって横方向、縦方向に伸縮自 在であって横幅、柵の高さが最適となるように対応できるという優れた効果を有 する。(2) An excellent effect that the sliding portion can be expanded and contracted in the horizontal and vertical directions to optimize the horizontal width and the height of the fence even for horizontal sheet piles of various sizes. To have.

【００４７】 （３）安全手摺りとして工事中の保安面の対策にもなるという優れた効果を有 する。(3) As a safety handrail, it has an excellent effect of being a measure for security during construction.

【００４８】 （４）夜間の転落防止網の覆設が簡単に出来るという優れた効果を有する。(4) It has an excellent effect that the fall prevention net can be easily covered at night.

【図面の簡単な説明】[Brief description of drawings]

【図１】 本考案に係わる管工事用転落防止柵の構造及
び設置状態を説明するための正面図である。FIG. 1 is a front view for explaining the structure and installation state of a pipe fall prevention fence according to the present invention.

【図２】 同隣合う管工事用転落防止柵同志のつなぎ管
による連結状態を示す部分拡大斜視図である。FIG. 2 is a partially enlarged perspective view showing a state in which two adjacent fall prevention fences for pipe work are connected by a connecting pipe.

【図３】 従来の管工事における掘削溝の土留め壁構築
の状態を説明するための横断断面斜視図である。FIG. 3 is a cross-sectional perspective view for explaining a state of construction of an earth retaining wall of an excavation groove in conventional pipe work.

【符号の説明】[Explanation of symbols]

１ 親杭 ２、２ａ… 横矢板 ３ 土留め壁（山留め壁） ４ 孔 ５ 短辺部 ６ 長辺部 ７ 管 ８ 角部 ９ つなぎ用管 １０ 鍔 １２ 連結フック １３ ユニバーサルジョイント １４、１６ 内管 １５ａ、１５ｂ、１５ｃ ボルト止め １７ 連接部 １８ 金網 １９ フック ２０ リング ２１ 平板 ２３ 立杭 ２４ （手摺り）パイプ ２５ パイプ連結金具 ２７ ブレース ３０、３０ａ、３０ｂ 管工事用転落防止柵 Ａ、Ｂ Ｌ字形管 1 Parent pile 2, 2a ... Horizontal sheet pile 3 Earth retaining wall (mounting wall) 4 Hole 5 Short side 6 Long side 7 Pipe 8 Corner 9 Connecting pipe 10 Collar 12 Connecting hook 13 Universal joint 14 16 Inner pipe 15a , 15b, 15c Bolting 17 Connection part 18 Wire mesh 19 Hook 20 Ring 21 Flat plate 23 Standing pile 24 (Handrail) Pipe 25 Pipe connecting fitting 27 Brace 30, 30a, 30b Fall prevention fence for pipe work A, B L-shaped pipe

Claims (2)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】 短辺部と長辺部からなるＬ字形管二つを
平行に向き合う短辺部の距離が１．７〜２．５ｍの範囲
で長辺部が摺動自在且つ任意の位置で固定可能となるよ
うに連結するとともに、前記二つのＬ字形管の短辺部端
に各々摺動自在且つ固定可能な管を挿入し、さらに一方
のＬ字形管の角部に長さが所定の範囲で自在に調節でき
るつなぎ用管を回動自在に連結するとともに該管の先端
に角度自在の連結フックを配したことを特徴とする管工
事用転落防止柵。1. A long side is slidable at an arbitrary position within a range of 1.7 to 2.5 m between the short sides where two L-shaped tubes each having a short side and a long side face parallel to each other. The two L-shaped pipes are connected so that they can be fixed, and slidable and fixable pipes are inserted into the ends of the short sides of the two L-shaped pipes. A fall prevention fence for pipe construction, characterized in that a connecting pipe that can be freely adjusted within the range is rotatably connected and an angled connecting hook is arranged at the tip of the pipe. 【請求項２】 前記Ｌ字形管二つを連結したコの字形管
の内側に矩形状枠に張られた金網を複数のフックにて張
設した構造を特徴とする請求項１記載の管工事用転落防
止柵。2. The pipe construction according to claim 1, wherein a wire mesh stretched in a rectangular frame is stretched by a plurality of hooks inside a U-shaped pipe that connects the two L-shaped pipes. Fall prevention fence.