JP2011206245A - Moving type safety belt mounting device for bridge construction - Google Patents

Moving type safety belt mounting device for bridge construction Download PDF

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JP2011206245A
JP2011206245A JP2010076721A JP2010076721A JP2011206245A JP 2011206245 A JP2011206245 A JP 2011206245A JP 2010076721 A JP2010076721 A JP 2010076721A JP 2010076721 A JP2010076721 A JP 2010076721A JP 2011206245 A JP2011206245 A JP 2011206245A
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girder
flange
safety belt
bridge construction
wheel
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JP5398619B2 (en
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Genichiro Ono
源一郎 小野
Daisuke Takeuchi
大輔 竹内
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Yokogawa Sumikin Bridge Corp
株式会社横河住金ブリッジ
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Abstract

PROBLEM TO BE SOLVED: To provide a moving type safety belt mounting device which ensures safety in mounting and removing about the work on a girder in a bridge construction and is superior in the construction performance and economic efficiency.SOLUTION: A framework comprises a pair of right and left supporting post parts 1, a connecting part 2 for connecting the supporting post parts 1 mutually, stopper parts 3 at lower ends of the supporting post parts 1, and a handrail part 4 for connecting between upper parts of the supporting post parts 1, and a pair of right and left wheel parts 5 are attached to the connecting part 2. A worker puts a hook of a safety belt on the handrail part 4 or the like by the right and left supporting post parts 1, the stopper parts 3, and the wheel parts 5 attached to the connecting part 2. The moving type safety belt mounting device moves with the worker on an upper flange 11a of the girder 11 by the wheel parts 5 while preventing the falling of the worker in a perpendicular direction of the girder by surrounding the upper flange 11a on the girder 11.

Description

本発明は、道路橋などの橋梁工事において、桁上で作業員が移動する際の安全性を向上させるための安全帯取付装置に関するものである。   The present invention relates to a safety belt attaching device for improving safety when an operator moves on a girder in bridge construction such as a road bridge.
一般に高所で作業を行う際は、安全帯を取付可能な安全装置を事前に設置し、その装置に作業員の腰部に取り付けた安全帯のフックを掛けることで作業員の転落を防止している。   In general, when working in high places, a safety device that can be fitted with a safety belt is installed in advance, and a safety belt hook attached to the waist of the worker is attached to the device to prevent the worker from falling. Yes.
しかしながら、安全装置を設置する際と撤去する作業時には、安全帯を取り付ける装置がない場合がほとんどであり、その際の安全対策が課題となっている。   However, when installing a safety device and when removing it, there are almost no devices to which a safety belt is attached, and safety measures at that time are a problem.
従来、橋梁工事における桁上での作業の場合、H形鋼桁、I桁などの上フランジに親綱支柱を5m程度の間隔をあけて固定し、その支柱間にロープや鋼管製の手すりを設置して安全装置としている。   Conventionally, when working on a girder in bridge construction, a master rope support is fixed to the upper flange of an H-shaped steel girder, I-girder, etc. with an interval of about 5 m, and a rope or steel pipe handrail is placed between the supports. Installed as a safety device.
例えば、桁の高さが2m程度の場合、桁をクレーン架設する前に梯子を使用して地上で支柱を取り付ける場合が多い。この場合、梯子を支柱設置間隔毎に設置する必要があり、作業員は毎回梯子を上下移動しなければならない。   For example, when the height of the girder is about 2 m, the column is often attached on the ground using a ladder before the girder is installed on the crane. In this case, it is necessary to install a ladder at every support installation interval, and an operator must move the ladder up and down every time.
また、撤去時は桁の上フランジから1.5m程度下がった位置に設置した中段足場を利用して行う場合が多い。この場合、中段足場を施工しなければならないため、経済性、施工速度の問題で課題が残る。   Moreover, the removal is often performed using a middle stage scaffolding installed at a position about 1.5 m below the upper flange of the girder. In this case, since a middle stage scaffolding must be constructed, problems remain in terms of economy and construction speed.
その他、従来技術として、特許文献1には鉄骨建物における梁上での作業に使用する墜落防止装置として、梁の上フランジに装着され、上フランジ上を回転移動する一対の回転移動手段と、回転移動手段を連結する連結手段と、安全帯取付手段とからなる墜落防止装置が記載されている。   In addition, as a conventional technique, Patent Document 1 discloses a pair of rotational movement means mounted on an upper flange of a beam and rotating on the upper flange as a crash prevention device used for work on the beam in a steel building, A crash prevention device is described which comprises a connecting means for connecting the moving means and a safety belt attaching means.
特許第2712013号Japanese Patent No. 2712013 特開2009−240357号公報JP 2009-240357 A
前述のように、桁の上フランジに親綱支柱を取り付ける方法では、取り付け時や取り外し時の安全性や施工性、経済性の課題がある。   As described above, the method of attaching the master rope support to the upper flange of the girder has problems of safety, workability, and economical efficiency at the time of attachment and removal.
また、特許文献1記載のものは、鉄骨建物における梁上での作業を建物対象としたもので、構造的に簡易ではあるがそのまま橋梁工事に利用することはできない。   Moreover, the thing of patent document 1 made the work on the beam in a steel frame building object, and although it is structurally simple, it cannot be utilized for bridge construction as it is.
特に橋梁工事の場合、桁自体が大型である他、桁どうしの接続部は高力ボルト接合のための添接板の段差があり、段差を乗り越えられる構造のものが必要となる。   In particular, in the case of bridge construction, the girder itself is large, and the connecting portion between the girder has a step of the attachment plate for high-strength bolt joining, and a structure that can overcome the step is required.
また、主桁上に架設される床版との結合のためのスタッドジベルなどが設けられ、主桁上フランジ端部にはシール材が設置されるなど、ジベルやシール材の存在も考慮し、これらを回避できる構造であることが要求される。   In addition, a stud gibber for connecting with a floor slab installed on the main girder is provided, and a seal material is installed at the end of the main girder upper flange. A structure that can avoid these is required.
本発明は上述のような課題の解決を図ったものであり、橋梁工事における桁上で作業に関し、取り付け時、取り外し時の安全性が確保され、かつ施工性、経済性に優れた移動式安全帯取付装置を提供することを目的としている。   The present invention is intended to solve the above-described problems, and relates to work on a girder in bridge construction, safety at the time of attachment and removal is ensured, and mobile safety that is excellent in workability and economy. The object is to provide a band attachment device.
請求項1に係る橋梁工事用移動式安全帯取付装置は、橋梁工事における桁上での作業の際に、作業員の安全帯を取り付けるための装置であって、桁の上フランジの両側に配置される左右一対または複数対の支柱部と、前記左右の支柱部を連結する連結部と、前記連結部に設けられ桁の上フランジ上を移動可能な左右1対または複数対の車輪部と、前記支柱部の下部に設けられ、前記連結部および車輪部とともに桁の上フランジを取り囲むことで桁直角方向への落下を防止するストッパー部とを有することを特徴とするものである。   The mobile safety band attaching device for bridge construction according to claim 1 is a device for attaching a safety belt for an operator during work on a girder in bridge construction, and is arranged on both sides of the upper flange of the girder. A pair of left and right support columns, a connection unit that connects the left and right support columns, a pair of left and right wheel units that are provided on the connection unit and are movable on the upper flange of the beam, and It has a stopper part which is provided in the lower part of the said support | pillar part, and prevents the fall to a girder perpendicular direction by surrounding the upper flange of a girder with the said connection part and a wheel part.
本発明は、安全装置の設置・解体時に作業員が桁の上フランジ上を歩くことが可能な安全帯取付装置として、安全帯取付装置自身が作業員と共に移動する方式としたものである。すなわち、安全帯取付装置に移動用の車輪部を設けることで、桁の上フランジ上を歩く作業員が押すまたは引くことで容易に移動させることが可能であり、転落災害が防止できる。   The present invention employs a system in which the safety belt attachment device itself moves together with the worker as a safety belt attachment device that allows the worker to walk on the upper flange of the girder when the safety device is installed / disassembled. That is, by providing the safety belt attaching device with a moving wheel portion, the worker walking on the upper flange of the girder can easily move it by pushing or pulling, and fall accidents can be prevented.
支柱部は連結部およびストッパー部とともに枠組を構成する部分であり、連結部とストッパー部が桁の上フランジを取り囲むようにして、傾いたときでも桁直角方向へ落下しないようにしている。   The strut portion is a portion that forms a frame together with the connecting portion and the stopper portion, and the connecting portion and the stopper portion surround the upper flange of the girders so that they do not fall in the direction perpendicular to the girders even when tilted.
これらは一体のものとして製作することもできるが、別体の組立て式のものとすることもできる。桁への取り付けは、例えば架設した桁端部から桁軸方向へ嵌め込むことによって行うことができる。桁端部には通常、足場が設置されているため、足場上で設置および取り外しが可能である。また、組立て式の場合は、各部材をネジ式あるいは嵌込み式とすることで、上フランジ側面から分解組立することも可能である。   These can be produced as one piece, but can also be assembled separately. Attachment to a girder can be performed, for example, by fitting from the end of the installed girder in the direction of the girder axis. Since a scaffold is usually installed at the end of the beam, it can be installed and removed on the scaffold. In the case of the assembly type, each member can be disassembled and assembled from the side surface of the upper flange by using a screw type or a fitting type.
車輪部は桁の上フランジ上を滑らかに摺動させるためのものであり、作業員が押し引きする際の負担が軽減される。なお、車輪部に段差吸収用のスプリングを入れておけば、さらにスムーズな移動が可能となる。また、車輪部をストッパー側にも設け、桁上フランジを上下から挟み込むようにしてもよい。   The wheel portion is for smoothly sliding on the upper flange of the girder, and the burden on the operator when pushing and pulling is reduced. If a spring for absorbing a step is inserted in the wheel portion, further smooth movement is possible. Further, the wheel portion may be provided also on the stopper side, and the girder flange may be sandwiched from above and below.
安全帯は装置の車輪部を除く、何れの位置にも取り付け可能であり、支柱部に手摺部あるいは操作の際に手で握るための把持部などが設けられている場合などは、それらに取り付けることもできる。   The safety belt can be attached to any position except for the wheel part of the device. If the support part is provided with a handrail part or a grip part for gripping by hand during operation, attach it to them. You can also.
車輪部は装置の安定性や方向性を考慮すると、最低2個必要である。さらに自立性を高めるためには3個以上の車輪があると良い。車輪の高さは特に限定されないが、移動面に突起や不陸などがある場合は、それらを越えることが可能な高さとすればよい。   Considering the stability and directionality of the device, at least two wheel portions are necessary. Furthermore, in order to improve independence, it is good to have three or more wheels. The height of the wheel is not particularly limited, but if there is a protrusion or unevenness on the moving surface, the height may be set so that it can be exceeded.
本装置は作業員が容易に移動できるためには手押しまたは手引きが可能な手すり付き構造が望ましいが、安全帯やその他ロープ等を介して歩きながら引く構造や、作業員自身が上に乗って人力または電動で移動出来る台車式構造にもできる。   In order to make it easy for workers to move, this device should have a handrail structure that can be pushed or pulled, but it can be pulled by walking through a safety belt or other ropes, Alternatively, it can be a cart type structure that can be moved electrically.
ストッパー部と桁の上フランジとの隙間は少ない程良いが、桁の高さ方向および幅方向の製作誤差を考慮して設定することが望ましい。   The smaller the gap between the stopper portion and the upper flange of the beam, the better. However, it is desirable to set in consideration of manufacturing errors in the height direction and width direction of the beam.
請求項2は、請求項1に係る橋梁工事用移動式安全帯取付装置において、前記支柱部の上部に、左右の支柱を連結する手摺部が設けられていることを特徴とするものである。   According to a second aspect of the present invention, in the mobile safety band mounting device for bridge construction according to the first aspect, a handrail portion for connecting the left and right struts is provided on the upper portion of the strut portion.
手摺部は、作業員が桁上を歩いて行く際に手で握って安全装置を移動させることができる。また、左右の支柱間を連結することで、枠組部材の一部として装置の剛性を高めることができる。また、上述のように安全帯の取付け部としても利用することができる。   The handrail part can be moved by a hand grip when the worker walks on the girder. Moreover, the rigidity of an apparatus can be improved as a part of frame member by connecting between right and left support | pillars. Further, as described above, it can also be used as a safety belt attachment.
請求項3は、請求項1または2に係る橋梁工事用移動式安全帯取付装置において、前記連結部が、前記車輪部による桁フランジ上の移動の際に、桁フランジ部に取り付けられるジベルの高さ以上の高さとなるように設けられていることを特徴とするものである。   A third aspect of the present invention is the mobile safety band attachment device for bridge construction according to the first or second aspect, wherein the connecting portion is mounted on the girder flange when the wheel moves on the girder flange. It is provided so that it may become the height more than this.
桁フランジ上にはスタッドジベルなどのジベルが取り付けられる場合が多く、支柱間をつなぐ連結部の高さをジベルの高さ以上としておくことで、スムーズな移動が可能となる。なお、車輪部についてはジベル間を通過する位置に取り付けるようにすればよい。   In many cases, a gibber such as a stud gibber is attached on the girder flange, and by making the height of the connecting part connecting the columns more than the height of the diver, smooth movement becomes possible. In addition, what is necessary is just to make it attach to the position which passes between between bevels about a wheel part.
請求項4は、請求項1、2または3に係る橋梁工事用移動式安全帯取付装置において、前記ストッパー部に、桁上フランジ下面との間に、前記車輪部による桁フランジ上の移動の際、桁どうしを長手方向に接続する添接板位置の段差を乗り越えられるだけのクリアランスが設けられていることを特徴とするものである。   A fourth aspect of the present invention is the mobile safety band mounting device for bridge construction according to the first, second, or third aspect, wherein the wheel portion is moved between the stopper portion and the lower surface of the upper flange when the wheel portion is moved on the beam flange. In addition, a clearance is provided so as to be able to overcome the step of the attachment plate position that connects the beams in the longitudinal direction.
落下防止の観点からは桁上フランジ下面とストッパー部との間隔が狭いほど設計が容易であり、ストッパー部も短くて済むが、通常、主桁どうしの接続位置には高力ボルト接合のための添接板などによる段差があるため、段差を乗り越えられるだけのクリアランスを設けておくことが考えられる。   From the standpoint of drop prevention, the narrower the gap between the underside of the upper flange and the stopper part, the easier the design and the shorter the stopper part. However, the main girder is usually connected to a high-strength bolt joint. Since there is a step due to an attachment plate or the like, it is conceivable to provide a clearance enough to overcome the step.
段差の回避手段としては、この他、前述したように車輪部にスプリングを組み込んでおくことが考えられる。   As another means for avoiding the step, it is conceivable to incorporate a spring in the wheel portion as described above.
本発明によれば、支柱部、連結部、ストッパー部、また必要に応じて設けられる手摺部が、転落防止のための頑丈な枠組を構成し、車輪部により桁上フランジ上をスムーズに移動させることができるため、高い安全性が確保され、かつ施工性の向上が図れる。   According to the present invention, the strut portion, the connecting portion, the stopper portion, and the handrail portion provided as necessary constitute a sturdy framework for preventing the fall, and the wheel portion smoothly moves on the upper flange. Therefore, high safety is ensured and workability can be improved.
それにより、橋梁工事の桁上での作業に使用する安全装置の設置・解体時においても作業員の転落災害を防止することができる。   As a result, it is possible to prevent a worker from falling down even when a safety device used for work on a bridge work is installed or dismantled.
また、桁接続部の添接板による段差、桁上に設けられるジベル、桁フランジ端部のシール材など、橋梁工事特有の課題も容易に回避することができる。   Moreover, problems peculiar to bridge construction such as a step due to an attachment plate of the girder connection part, a gibber provided on the girder, and a seal material at the end of the girder flange can be easily avoided.
本発明の移動式安全帯取付装置の一実施形態を示したものであり、(a)は装置が取り付けられる橋梁主桁側面からみた図、(b)は橋軸直角方向の断面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of a mobile safety belt attaching device of the present invention, where (a) is a view seen from the side of a bridge main girder to which the device is attached, and (b) is a cross-sectional view perpendicular to the bridge axis. 本発明の移動式安全帯取付装置の他の実施形態における橋梁主桁側面からみた図である。It is the figure seen from the bridge main girder side surface in other embodiment of the mobile safety belt attachment apparatus of this invention. 主桁添接板の段差を乗り越える状況を示した橋軸直角方向の断面図である。It is sectional drawing of the bridge axis perpendicular direction which showed the condition which gets over the level | step difference of a main girder attachment board.
以下、本発明の好ましい実施形態を添付図面に基づいて説明する。ただし、本発明はこれらの実施形態に限定されるものではない。   Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to these embodiments.
図1は、本発明の移動式安全帯取付装置の一実施形態を示したものであり、左右一対の支柱部1と、支柱部1どうしを連結する連結部2と、支柱部1の下端のストッパー部3と、支柱部1の上部間を連結する手摺部4とで枠組みを構成し、連結部2に左右一対の車輪部5を取り付けている。   FIG. 1 shows an embodiment of the mobile safety belt mounting device of the present invention, in which a pair of left and right struts 1, a connecting part 2 for connecting the struts 1 to each other, and a lower end of the strut 1 are shown. The stopper portion 3 and the handrail portion 4 that connects the upper portions of the column portions 1 constitute a frame, and a pair of left and right wheel portions 5 are attached to the connecting portion 2.
桁11に対しては、左右の支柱部1と、ストッパー部3と、連結部2に取り付けた車輪部5とで、桁11の上フランジ11aを取り囲むことで、桁直角方向への落下を防止しつつ、車輪部5により桁11の上フランジ11a上を作業員とともに移動できるようになっている。   For the girder 11, the left and right support columns 1, the stopper unit 3, and the wheel unit 5 attached to the connecting unit 2 surround the upper flange 11 a of the girder 11 to prevent the girder 11 from dropping in the direction perpendicular to the girder. However, the wheel portion 5 can move along the upper flange 11a of the beam 11 together with the worker.
支柱部1、連結部2、ストッパー部3、手摺部4としては、金属製のパイプ材あるいは棒材が用いられる。本実施形態は溶接でこれらを接合する場合であるが、ネジや嵌め込みによる組立て式とすることもできる。   As the support | pillar part 1, the connection part 2, the stopper part 3, and the handrail part 4, metal pipe materials or rods are used. Although this embodiment is a case where these are joined by welding, it can also be set as an assembly type by screws or fitting.
作業員は自身の腰部に着用した安全帯のフックを手摺部4等に取り付け、安全帯取付装置と一緒に桁11の上フランジ11a上を移動する。作業員が桁11上から転落した際は、安全帯取付装置のストッパー部3が桁11の上フランジ11aに当たり、落下を防止する。なお、安全帯のフック取付け位置は手摺部4に限定されることはなく、安全帯フック取付け用の孔を手摺部4や支柱部1などに設け、そこに取り付けても問題ない。   The worker attaches the hook of the safety belt worn on his / her waist to the handrail 4 or the like, and moves on the upper flange 11a of the beam 11 together with the safety belt attaching device. When the worker falls from above the girder 11, the stopper portion 3 of the safety band attaching device hits the upper flange 11 a of the girder 11 to prevent the fall. Note that the hook position of the safety belt is not limited to the handrail portion 4, and there is no problem even if a hole for attaching the safety belt hook is provided in the handrail portion 4 or the column portion 1 and attached thereto.
また、連結部2は、移動時に、桁11の上フランジ11aに植設されたスタッドジベル12にぶつからない高さとなるようにしてあるが、作業員が所定位置まで移動して手摺部4から手を離すと、図1(a)のように支柱部1が倒れた状態となる。その際、ストッパー部3が桁11の上フランジ11a下面に当たることで、斜めの自立状態が保たれるようにしてある。   In addition, the connecting portion 2 has a height that does not collide with the stud gibber 12 planted on the upper flange 11a of the girder 11 during movement, but the worker moves to a predetermined position and moves from the handrail portion 4 to the hand. When is released, the support column 1 is in a collapsed state as shown in FIG. At that time, the stopper 3 is brought into contact with the lower surface of the upper flange 11a of the girder 11 so that an inclined self-supporting state is maintained.
図2は、本発明の移動式安全帯取付装置の他の実施形態を示したもので、図1の実施形態のものに対し、車輪部5を左右それぞれ2輪設けることで自立できるようにしたものである。車輪部5は3輪以上でもよい。   FIG. 2 shows another embodiment of the mobile safety belt attaching device of the present invention. In contrast to the embodiment of FIG. 1, the wheel portion 5 can be provided independently by providing two left and right wheels. Is. The wheel portion 5 may be three or more wheels.
図3は、桁11接続部の添接板13の段差を乗り越える状況を示したものである。   FIG. 3 shows a situation where the step of the splicing plate 13 at the connecting portion of the girder 11 is overcome.
桁11どうしの接合を高力ボルトで行っている場合は、図3に示すように接合部の段差が生じるため、段差を越える隙間量が必要である。   When joining the girders 11 with high-strength bolts, a step difference occurs at the joint portion as shown in FIG.
この他、移動の安定性を考慮すると、ストッパー部3にスプリング機能付きの車輪を付けることも考えられる。   In addition, in consideration of movement stability, it is conceivable to attach a wheel with a spring function to the stopper portion 3.
1…支柱部、2…連結部、3…ストッパー部、4…手摺部、5…車輪部、
11…桁、11a…上フランジ、12…スタッドジベル、13…添接板
DESCRIPTION OF SYMBOLS 1 ... Support | pillar part, 2 ... Connection part, 3 ... Stopper part, 4 ... Handrail part, 5 ... Wheel part,
11 ... Girder, 11a ... Upper flange, 12 ... Stud gibber, 13 ... Joining plate

Claims (4)

  1. 橋梁工事における桁上での作業の際に、作業員の安全帯を取り付けるための装置であって、
    桁の上フランジの両側に配置される左右一対または複数対の支柱部と、
    前記左右の支柱部を連結する連結部と、
    前記連結部に設けられ桁の上フランジ上を移動可能な左右1対または複数対の車輪部と、
    前記支柱部の下部に設けられ、前記連結部および車輪部とともに桁の上フランジを取り囲むことで桁直角方向への落下を防止するストッパー部
    とを有することを特徴とする橋梁工事用移動式安全帯取付装置。
    It is a device for attaching a safety belt for workers when performing work on girders in bridge construction,
    A pair of left and right or multiple pairs of struts arranged on both sides of the upper flange of the beam,
    A connecting portion that connects the left and right support columns;
    A pair of right and left wheels or a plurality of pairs of wheels provided on the connecting portion and movable on an upper flange of the beam;
    A mobile safety band for bridge construction, comprising a stopper portion provided at a lower portion of the support column and preventing a drop in a direction perpendicular to the beam by surrounding the upper flange of the beam together with the connecting unit and the wheel unit. Mounting device.
  2. 前記支柱部の上部には左右の支柱を連結する手摺部が設けられていることを特徴とする請求項1記載の橋梁工事用移動式安全帯取付装置。   The mobile safety band mounting device for bridge construction according to claim 1, wherein a handrail portion for connecting the left and right columns is provided at an upper portion of the column unit.
  3. 前記連結部は、前記車輪部による桁フランジ上の移動の際に、桁フランジ部に取り付けられるジベルの高さ以上の高さとなるように設けられていることを特徴とする請求項1または2記載の橋梁工事用移動式安全帯取付装置。   The said connection part is provided so that it may become the height more than the height of the dowel attached to a girder flange part at the time of the movement on the girder flange by the said wheel part. Mobile safety belt attachment device for bridge construction.
  4. 前記ストッパー部は、桁上フランジ下面との間に、前記車輪部による桁フランジ上の移動の際、桁どうしを長手方向に接続する添接板位置の段差を乗り越えられるだけのクリアランスが設けられていることを特徴とする請求項1、2または3記載の橋梁工事用移動式安全帯取付装置。   The stopper is provided with a clearance between the stopper flange and the underside of the girder flange so as to be able to get over the step of the attachment plate position that connects the girders in the longitudinal direction when the wheel is moved on the girder flange. The mobile safety band attaching device for bridge construction according to claim 1, 2 or 3.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013244090A (en) * 2012-05-24 2013-12-09 Yokogawa Sumikin Bridge Corp Mobile safety harness attaching device for bridgework
JP2014226465A (en) * 2013-05-27 2014-12-08 株式会社横河住金ブリッジ Mobile safety belt fitting device for bridge construction
KR101725183B1 (en) * 2016-06-29 2017-04-11 유한회사 오케이안전산업 Apparatus for footholding safety for working height steel frame

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Publication number Priority date Publication date Assignee Title
JPS55175447U (en) * 1979-06-04 1980-12-16
JPS5729371A (en) * 1980-07-26 1982-02-17 Tohoku Electric Power Co Safety device doubling as rise and fall and horizontal movement
JP2712013B2 (en) * 1995-10-20 1998-02-10 株式会社東京電▲気▼工務所 Fall prevention device for work on steel beams
JP2003119721A (en) * 2001-10-18 2003-04-23 Kawada Kogyo Kk Work truck for elevated structure
JP2009240357A (en) * 2008-03-28 2009-10-22 West Japan Railway Co Fall preventive device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55175447U (en) * 1979-06-04 1980-12-16
JPS5729371A (en) * 1980-07-26 1982-02-17 Tohoku Electric Power Co Safety device doubling as rise and fall and horizontal movement
JP2712013B2 (en) * 1995-10-20 1998-02-10 株式会社東京電▲気▼工務所 Fall prevention device for work on steel beams
JP2003119721A (en) * 2001-10-18 2003-04-23 Kawada Kogyo Kk Work truck for elevated structure
JP2009240357A (en) * 2008-03-28 2009-10-22 West Japan Railway Co Fall preventive device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013244090A (en) * 2012-05-24 2013-12-09 Yokogawa Sumikin Bridge Corp Mobile safety harness attaching device for bridgework
JP2014226465A (en) * 2013-05-27 2014-12-08 株式会社横河住金ブリッジ Mobile safety belt fitting device for bridge construction
KR101725183B1 (en) * 2016-06-29 2017-04-11 유한회사 오케이안전산업 Apparatus for footholding safety for working height steel frame

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