JP7239983B2 - Working steps and posts - Google Patents

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JP7239983B2
JP7239983B2 JP2019123325A JP2019123325A JP7239983B2 JP 7239983 B2 JP7239983 B2 JP 7239983B2 JP 2019123325 A JP2019123325 A JP 2019123325A JP 2019123325 A JP2019123325 A JP 2019123325A JP 7239983 B2 JP7239983 B2 JP 7239983B2
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support
support wall
hook member
working
strut
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JP2021008761A (en
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直己 権田
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小田鐵網株式会社
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
    • Y02A10/23—Dune restoration or creation; Cliff stabilisation

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Description

本発明は、法面に落石防護網を張架する支柱に着脱自在に取り付けられる作業用ステップおよびその取付用の支柱に関する。 TECHNICAL FIELD The present invention relates to a working step that is detachably attached to a support that stretches a rockfall protection net over a slope, and a support for mounting the work step.

従来より、落石の危険のある切取法面や山腹の岩石を落石防護網で覆い、道路の災害を防止するための工事が実施されている。法面に落石防護網を設置する場合、図８，９に示すように、法面に支柱を設置し、支柱の頂上部に防護網を取り付ける作業が生ずる。その際、支柱の頂上部に作業員の手が届くように、支柱に幾ステップかの足場を設ける必要がある。このとき、図１０に示すように、支柱１にロープ状の部材５２を用いて足場となる丸太材５１を括り付ける方法が広く周知されている。その他、特許文献１には、角材１を一対のクランプ部材６ａ，７ａで挟持することにより、角材１に梯子型仮設足場２ａを取り付ける技術が記載されている。 Conventionally, construction work has been carried out to prevent road disasters by covering cut slopes and rocks on mountainsides, which are at risk of falling rocks, with rockfall protection nets. When installing a rockfall protection net on a slope, as shown in FIGS. 8 and 9, there is a need to install a support on the slope and attach the protection net to the top of the support. In this case, it is necessary to provide several steps of scaffolding on the column so that the workers can reach the top of the column. At this time, as shown in FIG. 10, a widely known method is to use a rope-like member 52 to bind a log material 51 that serves as a scaffolding to the post 1 . In addition, Patent Document 1 describes a technique of attaching a ladder-type temporary scaffolding 2a to a square timber 1 by clamping the square timber 1 between a pair of clamp members 6a and 7a.

実開平３－２０６４９号公報Japanese Utility Model Laid-Open No. 3-20649

しかし、特許文献１や従来技術によれば、足場の取り付けに手間がかかるという問題があった。特に、従来技術の場合、数本の丸太材５１を括り付ける作業だけで、支柱１本につき約２０～３０分程度の時間がかかり、全ての支柱の準備が整うまでに一日費やしてしまう場合もあった。また、作業中に括り付けた丸太材５１がずり下がるという問題もあった。 However, according to Patent Document 1 and the related art, there is a problem that it takes time and effort to attach the scaffolding. In particular, in the case of the conventional technology, it takes about 20 to 30 minutes for each post just by tying several logs 51 together, and it takes a whole day to prepare all the posts. There was also There is also a problem that the tied log 51 slides down during the work.

そこで、本発明の目的は、容易に着脱でき、かつ、取り付け位置で保持できる作業用ステップを提供することにある。 SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a working step that can be easily attached and detached and that can be held in an attached position.

上記課題を解決するために、本発明は次のような作業用ステップおよび支柱を提供する。
（１）法面に落石防護網を張架する支柱に着脱自在に取り付けられる作業用ステップであって、ステップ部材と、ステップ部材を支柱壁に掛止するフック部材とを備え、フック部材は、底部と起きあがり部を有するように曲折され、ステップ部材は、フック部材の底部に固定されていることを特徴とする作業用ステップ。 In order to solve the above problems, the present invention provides the following working steps and supports.
(1) A working step that is detachably attached to a pillar that stretches a rockfall protection net on a slope surface, comprising a step member and a hook member that hooks the step member to the pillar wall. A working step, wherein the step member is bent to have a bottom portion and a raised portion, wherein the step member is fixed to the bottom portion of the hook member.

（２）作業用ステップを支柱に取り付けた状態において、ステップ部材の少なくとも一部が支柱壁の表面側に配置され、起き上がり部の少なくとも一部が支柱壁の裏面側に配置される上記（１）に記載の作業用ステップ。 (2) The above (1), in which at least part of the step member is arranged on the front side of the support wall and at least part of the rising portion is arranged on the back side of the support wall when the work step is attached to the support. Working steps described in .

（３）支柱壁の表面側に配置されるステップ部材の一部と、支柱壁の裏面側に配置される起き上がり部の一部とは、支柱壁の厚みを受け入れる空隙を介して配置される上記（２）に記載の作業用ステップ。 (3) A part of the step member arranged on the front surface side of the support wall and a part of the rising part arranged on the rear surface side of the support wall are arranged with a gap that accommodates the thickness of the support wall. (2) working step.

（４）法面に落石防護網を張架する支柱であって、支柱壁に、上記（１）～（３）の何れか一つに記載のフック部材を掛止する掛止部を設けたことを特徴とする支柱。 (4) A post for suspending a rockfall protection net on a slope, wherein the post wall is provided with a hooking portion for hooking the hook member according to any one of (1) to (3) above. A strut characterized by:

（５）支柱は、Ｈ鋼であり、掛止部が、Ｈ鋼のフランジに形成されたスリットを含む、上記（４）に記載の支柱。 (5) The strut according to (4) above, wherein the strut is H-steel, and the latching portion includes a slit formed in a flange of the H-steel.

（６）支柱は、Ｈ鋼であり、掛止部が、Ｈ鋼のフランジに開口した掛止穴を含む、上記（５）に記載の支柱。 (6) The strut according to (5) above, wherein the strut is H-steel and the latch portion includes a latch hole opening into a flange of the H-steel.

本発明の作業用ステップおよび支柱によれば、支柱壁に設けた掛止部にフック部材を掛けるだけで作業用ステップを取り付け可能であるため、一瞬で足場を着脱できるとともに、作業用ステップのずり下がりも防止できるという格別な効果を奏する。 According to the work step and the support of the present invention, the work step can be attached only by hooking the hook member on the hook provided on the support wall. It has a special effect that it can also prevent a drop.

本発明の作業用ステップおよび支柱の一実施形態を示す概要図である。1 is a schematic diagram illustrating one embodiment of the working step and strut of the present invention; FIG. 図１の作業用ステップを着脱した支柱を、（ａ）法面方向、（ｂ）側面方向から見た概要図である。1. It is the schematic which looked at the support|pillar which attached/detached the step of FIG. 1 from (a) slope direction, (b) side direction. 作業用ステップの（ａ）正面図、（ｂ）平面図、（ｃ）底面図である。They are (a) a front view, (b) a plan view, and (c) a bottom view of the working step. 作業用ステップの（ａ）左側面図、（ｂ）ＡＡ断面図、（ｃ）背面上方向から見下ろした斜視図である。They are (a) left side view of a working step, (b) AA cross-sectional view, and (c) a perspective view looking down from above the rear surface. 支柱の掛止部の（ａ１）法面方向から見た正面図、（ａ２）ＢＢ断面図、（ａ３）ＣＣ断面図、（ｂ１）法面方向から見た正面図、（ｂ２）ＢＢ断面図、（ｂ３）ＣＣ断面図である。(a1) Front view seen from the slope direction, (a2) BB cross-sectional view, (a3) CC cross-sectional view, (b1) Front view seen from the slope direction, (b2) BB cross-sectional view of the hooking part of the post , (b3) CC sectional view. 作業用ステップを取り付ける動作を説明する説明図である。FIG. 10 is an explanatory diagram for explaining the operation of attaching the working step; 作業用ステップを取り付けた状態の支柱の掛止部と作業用ステップの配置関係を示す左側面図である。FIG. 4 is a left side view showing the positional relationship between the hooking portion of the post and the working step with the working step attached. 従来の作業用ステップの使用状態を示す図である。FIG. 10 is a diagram showing a state of use of a conventional working step; 従来の作業用ステップの使用状態を示す図である。FIG. 10 is a diagram showing a state of use of a conventional working step; 従来の作業用ステップを取り付けた支柱を法面方向から見た概要図である。It is the schematic which looked at the support|pillar which attached the conventional step for a work from the slope direction.

以下、本発明の実施形態を図面に基づいて説明する。説明中のサイズ表記は、好ましい数値を例示するものであり、状況に応じて適宜サイズ変更できるものとする。図１に示すように、本発明の作業用ステップ２は、法面Ｇに落石防護網Ｎを張架する支柱１に取り付けられるものである。Ｈ形鋼よりなる支柱１は、法面Ｇ側に配置されるフランジ１１に、作業用ステップ２を取り付ける掛止部１２（図２参照）が形成されている。なお、設置時に向きを変える手間を省くため、Ｈ鋼の両方のフランジ１１に掛止部１２を設けても良い。 BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. The size notation in the description is an example of preferred numerical values, and the size can be appropriately changed according to the situation. As shown in FIG. 1, the working step 2 of the present invention is attached to a post 1 that stretches a rockfall protection net N on a slope G. As shown in FIG. The column 1 made of H-shaped steel has a flange 11 arranged on the side of the slope G, and a hooking portion 12 (see FIG. 2) for attaching the working step 2 is formed. In addition, in order to save the trouble of changing the orientation at the time of installation, the hooking portions 12 may be provided on both flanges 11 of the H steel.

図２に示すように、作業用ステップ２は、作業目的に応じて都合の良い掛止部１２に自在に着脱することができる。作業用ステップ２は、例えば、支柱１を昇降するための昇降ステップや、支柱１の様々な高度で落石防護網Ｎの取り付けおよびメンテナンスを実施するための作業台として用いることができる。 As shown in FIG. 2, the working step 2 can be freely attached to and detached from a convenient hook 12 according to the purpose of the work. The working step 2 can be used, for example, as an elevating step for raising and lowering the column 1 and as a workbench for performing installation and maintenance of the rockfall protection net N at various altitudes of the column 1 .

図３，４に示すように、作業用ステップ２は、支柱１に水平に取り付けられるステップ部材２１と、ステップ部材２１を支柱壁としてのフランジ１１に形成された掛止部１２に掛止するフック部材２２を備える。ステップ部材２１は、断面矩形枠状の棒材からなり、中心部が空洞に形成されている。また、ステップ部材２１は、支柱１に掛止した状態において両端部が支柱１から両側方に各約１０ｃｍ程度突出し、作業者は、該突出部の天面２１ａに足を乗せることができる。フック部材２２は、直径約９ｍｍ程度の断面略正円形の棒状部材からなる。また、フック部材２２は、底部２３と起き上がり部２４を備えた略Ｌ字形状に曲折され、底部２３は、ステップ部材２１の天面２１ａに固定されている。 As shown in FIGS. 3 and 4, the working step 2 includes a step member 21 horizontally attached to the column 1 and a hook for hooking the step member 21 to a hooking portion 12 formed on a flange 11 serving as a column wall. A member 22 is provided. The step member 21 is made of a rod material having a rectangular frame shape in cross section, and has a hollow center portion. Both ends of the step member 21 protrude about 10 cm from the support 1 in a state of being hooked to the support 1, and the operator can place his or her feet on the top surface 21a of the protrusion. The hook member 22 is made of a rod-shaped member having a substantially circular cross section with a diameter of about 9 mm. Further, the hook member 22 is bent into a substantially L-shape having a bottom portion 23 and a rising portion 24 , and the bottom portion 23 is fixed to the top surface 21 a of the step member 21 .

図５に示すように、掛止部１２は、支柱１のフランジ１１に、ウエブ１５を軸とする軸対称に形成されている。このとき、図５（ａ１）～（ａ３）に示すように、掛止部１２をフック部材２２の断面形状と相似形の略正円形の掛止穴１３とすることも、図５（ｂ１）～（ｂ３）に示すように、掛止部１２をフランジ１１の側方から支柱１の長手方向中心軸に向かう水平なスリット１４として設けることも可能である。なお、フック部材２２の横断面を直径約９ｍｍ程度とし、当該フック部材２２の曲折部２５をスムーズに挿通させるために、掛止穴１３を直径約１２ｍｍ、あるいは、スリット１４を約１２ｍｍ幅に設けることが好ましい。 As shown in FIG. 5, the hooking portion 12 is formed on the flange 11 of the column 1 symmetrically with respect to the web 15 . At this time, as shown in FIGS. 5(a1) to 5(a3), the hooking portion 12 may be a substantially circular hooking hole 13 similar in cross-sectional shape to the hook member 22, or as shown in FIG. 5(b1). As shown in (b3), it is also possible to provide the hooking portion 12 as a horizontal slit 14 extending from the side of the flange 11 toward the central axis of the column 1 in the longitudinal direction. The cross section of the hook member 22 is about 9 mm in diameter, and in order to smoothly insert the bent portion 25 of the hook member 22, the hooking hole 13 is provided with a diameter of about 12 mm, or the slit 14 is provided with a width of about 12 mm. is preferred.

次に、作業用ステップ２を支柱１に取り付ける動作について図６に基づいて説明する。まず、図６（ａ）のように、フック部材２２をフランジ１１面と垂直に配置し起き上がり部２４を掛止部１２に挿通させる。次に、図６（ｂ）のように、底部２３と起き上がり部２４との間に形成される曲折部２５を、曲折部２５の曲率中心周りで回転させながら掛止部１２に挿通し、図６（ｃ）のように、フック部材２２の起き上がり部２４をフランジ１１の裏面１１ｂに沿うように配置して、作業用ステップ２を取り付ける。このとき、曲折部２５は、外周縁２５ａが曲線を描くように曲折されていることが好ましい。 Next, the operation of attaching the working step 2 to the post 1 will be described with reference to FIG. First, as shown in FIG. 6( a ), the hook member 22 is arranged perpendicular to the surface of the flange 11 and the raised portion 24 is inserted into the hook portion 12 . Next, as shown in FIG. 6B, the bent portion 25 formed between the bottom portion 23 and the rising portion 24 is inserted into the hook portion 12 while being rotated around the center of curvature of the bent portion 25. 6(c), the raised portion 24 of the hook member 22 is arranged along the rear surface 11b of the flange 11, and the working step 2 is attached. At this time, it is preferable that the bent portion 25 is bent so that the outer peripheral edge 25a draws a curve.

図７に示すように、支柱１と支柱１に取り付けた作業用ステップ２との配置関係は、ステップ部材２１の少なくとも一部である側面２１ｂがフランジ１１の表面１１ａの側に配置されるとともに、起き上がり部２４の少なくとも一部がフランジ１１の裏面１１ｂの側に配置される状態となる。また、このとき、側面２１ｂと起き上がり部２４とは、フランジ１１の厚みｄ１を受け入れる空隙ｄ２を介して配置される。様々な厚みｄ１を許容できるよう、側面２１ｂと起き上がり部２４の距離、つまり、空隙ｄ２を大きく設けることも好適である。 As shown in FIG. 7, the positional relationship between the column 1 and the work step 2 attached to the column 1 is such that the side surface 21b, which is at least a part of the step member 21, is arranged on the side of the surface 11a of the flange 11, At least part of the raised portion 24 is placed on the rear surface 11 b side of the flange 11 . At this time, the side surface 21b and the rising portion 24 are arranged with a gap d2 that receives the thickness d1 of the flange 11 interposed therebetween. It is also preferable to provide a large gap d2 between the side surface 21b and the raised portion 24 so as to allow various thicknesses d1.

以上の構成の作業用ステップ２および支柱１によれば、ステップ部材２１とフック部材２２から構成された作業用ステップ２を支柱１の掛止部１２に掛止することで、手軽に作業用ステップ２を取り付けることができるため、落石防護網Ｎの設置作業やメンテナンス作業の工数を抑えることが可能である。また、支柱１が傾斜状態で設けられている場合には、作業用ステップ２の自重によって側面２１ｂがフランジ１１の表面１１ａに当接し、より取り付け状態が安定する。さらに、落石防護網Ｎの取り付け中またはメンテナンス中に、作業用ステップ２を着脱して容易に使い回すことも可能である。 According to the working step 2 and the post 1 configured as described above, the working step 2 composed of the step member 21 and the hook member 22 can be easily hooked to the hooking portion 12 of the post 1. 2 can be attached, it is possible to reduce the man-hours for the installation work and maintenance work of the rockfall protection net N. Further, when the post 1 is provided in an inclined state, the side surface 21b abuts the surface 11a of the flange 11 due to the weight of the working step 2, and the mounting state is further stabilized. Furthermore, it is also possible to attach and detach the working step 2 during the installation or maintenance of the rockfall protection net N and to reuse it easily.

本発明は、上記実施形態に限定されるものではなく、発明の趣旨を逸脱しない範囲で、下記（１）～（３）のように各部の形状や構成を適宜に変更して実施することも可能である。
（１）フック部材２２を、断面多角形の棒状部材とする。
（２）フック部材２２を、略Ｌ字形状ではなく半円形状に形成する。
（３）ステップ部材２１を断面円形枠状や多角形枠状とする。 The present invention is not limited to the above embodiments, and can be implemented by appropriately changing the shape and configuration of each part as shown in (1) to (3) below without departing from the spirit of the invention. It is possible.
(1) The hook member 22 is a rod-shaped member having a polygonal cross section.
(2) The hook member 22 is formed in a semicircular shape instead of a substantially L shape.
(3) The step member 21 has a circular frame shape or a polygonal frame shape in cross section.

１ 支柱
２ 作業用ステップ
１１ フランジ（ａ：表面、ｂ：裏面）
１２ 掛止部
１３ 掛止穴
１４ スリット
２１ ステップ部材（ａ：天面、ｂ：側面）
２２ フック部材
２３ 底部
２４ 起き上がり部
２５ 曲折部（ａ：外周縁）
５１ 丸太材
５２ ロープ状の部材
ｄ１ フランジの厚み
ｄ２ 空隙
Ｇ 法面
Ｎ 落石防護網 1 post 2 working step 11 flange (a: front side, b: back side)
12 hooking part 13 hooking hole 14 slit 21 step member (a: top surface, b: side surface)
22 hook member 23 bottom portion 24 rising portion 25 bending portion (a: outer peripheral edge)
51 Log material 52 Rope-like member d1 Flange thickness d2 Gap G Slope N Rockfall protection net

Claims (6)

法面に落石防護網を張架する支柱に着脱自在に取り付けられる作業用ステップであって、
ステップ部材と、前記ステップ部材を支柱壁に掛止するフック部材とを備え、
前記フック部材は、底部と起きあがり部を有するように曲折され、
前記ステップ部材は、前記フック部材の底部に固定され、
前記フック部材は、前記ステップ部材の長手方向中央部に設けられ、前記ステップ部材の両端部は、前記支柱から両側方向に突出することを特徴とする作業用ステップ。 A work step that is detachably attached to a support that stretches a rockfall protection net on a slope,
comprising a step member and a hook member for hooking the step member to the support wall,
the hook member is bent to have a bottom portion and a raised portion;
The step member is fixed to the bottom of the hook member ,
The working step, wherein the hook member is provided in the longitudinal central portion of the step member, and both ends of the step member protrude from the post in both directions. 前記作業用ステップを支柱に取り付けた状態において、前記ステップ部材の少なくとも一部が前記支柱壁の表面側に配置され、前記起き上がり部の少なくとも一部が前記支柱壁の裏面側に配置される請求項１に記載の作業用ステップ。 At least part of the step member is arranged on the surface side of the support wall, and at least part of the rising portion is arranged on the back surface side of the support wall in a state where the working step is attached to the support. 1. Working steps according to 1. 前記支柱壁の表面側に配置されるステップ部材の一部と、前記支柱壁の裏面側に配置される起き上がり部の一部とは、前記支柱壁の厚みを受け入れる空隙を介して配置される請求項１または２に記載の作業用ステップ。 A part of the step member arranged on the surface side of the support wall and a part of the rising part arranged on the back surface side of the support wall are arranged with a gap that accommodates the thickness of the support wall. Item 3. The working step of item 1 or 2. 法面に落石防護網を張架する支柱であって、
支柱壁に、請求項１～３の何れか一項に記載のフック部材を掛止する掛止部を設けたことを特徴とする支柱。 A support for suspending a rockfall protection net on a slope,
A pillar, characterized in that a pillar wall is provided with a hooking portion for catching the hook member according to any one of claims 1 to 3. 前記支柱は、Ｈ鋼であり、
前記掛止部が、前記Ｈ鋼のフランジに水平に形成されたスリットを含む、請求項４に記載の支柱。 The strut is H steel,
5. The strut of claim 4, wherein the latch includes a slit formed horizontally in the H-beam flange. 前記支柱は、Ｈ鋼であり、
前記掛止部が、前記Ｈ鋼のフランジに開口した掛止穴を含む、請求項４に記載の支柱。 The strut is H steel,
5. The strut of claim 4, wherein the latch includes a latch hole opening into the flange of the H-beam.
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3004904U (en) 1994-06-02 1994-12-06 ジャパン スチールス インターナショナル株式会社 Step member for ramp
US6305497B1 (en) 1999-12-17 2001-10-23 Steve J. Simon Mast ladder assembly
JP2002242422A (en) 2001-02-19 2002-08-28 Kiju Nakamura Footrest device
US20070240935A1 (en) 2006-03-14 2007-10-18 O'brien Richard Ladder step attachment device
JP2009041339A (en) 2007-08-10 2009-02-26 Ksk:Kk Wale supporting device
JP2012246691A (en) 2011-05-30 2012-12-13 Tokyo Seiko Co Ltd Column for stone fall protective net and stone fall protection device using the same
US20180002982A1 (en) 2016-06-30 2018-01-04 Dressel Designs, Llc Ladder

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4450936A (en) * 1983-05-18 1984-05-29 Interlake, Inc. Removable step for pallet rack
JPS6120896U (en) * 1984-07-10 1986-02-06 三菱電機株式会社 lift device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3004904U (en) 1994-06-02 1994-12-06 ジャパン スチールス インターナショナル株式会社 Step member for ramp
US6305497B1 (en) 1999-12-17 2001-10-23 Steve J. Simon Mast ladder assembly
JP2002242422A (en) 2001-02-19 2002-08-28 Kiju Nakamura Footrest device
US20070240935A1 (en) 2006-03-14 2007-10-18 O'brien Richard Ladder step attachment device
JP2009041339A (en) 2007-08-10 2009-02-26 Ksk:Kk Wale supporting device
JP2012246691A (en) 2011-05-30 2012-12-13 Tokyo Seiko Co Ltd Column for stone fall protective net and stone fall protection device using the same
US20180002982A1 (en) 2016-06-30 2018-01-04 Dressel Designs, Llc Ladder

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