JP3905451B2

JP3905451B2 - Construction scaffolding

Info

Publication number: JP3905451B2
Application number: JP2002285792A
Authority: JP
Inventors: 貴之永福
Original assignee: 東京製綱繊維ロープ株式会社; 建設塗装工業株式会社
Priority date: 2002-09-30
Filing date: 2002-09-30
Publication date: 2007-04-18
Anticipated expiration: 2022-09-30
Also published as: JP2004124376A

Description

【０００１】
【発明の属する技術分野】
本発明は工事用足場吊具に関する。
【０００２】
【従来の技術】
作業員が中空に位置して作業を行う工事、たとえば鉄道や道路の橋桁を点検したり、塗装したり、補修したりする工事においては、吊足場が用いられる。
かかる吊り足場を得るための手段として、従来ではチェーンを使用し、チェーンの中間をＵ状に反転させ、チェーン上端部で構造物に固定し、こうしたセットを対向側にも配して1対のＵターン部で桁管の両端部を支えるようにし、こうしたものを所定間隔ごとに配し、各桁管に足場板を交差状に渡す方式が採られていた。
【０００３】
しかし、先行技術の足場吊具では次のような問題があった。
1)吊具の重量が重いため、工事に必要な多数の吊具の現場への輸送、現場での持ち運びおよびセットの各段階で多大な労力と時間を要する。
2)足場板(桁管)の吊り高さ位置を現場で簡単に調整することが困難である。
3)橋桁等には高圧架線が敷設されることが多いが、チェーンが鉄鋼材であるため誘導電流が誘起され、感電事故が発生する。
【０００４】
【発明が解決しようとする課題】
本発明は前記のような問題点を解消するためになされたもので、その目的とするところは、軽量かつコンパクトで運搬や持ち運びが容易で、電気的にも安全で、かつ足場板の吊り高さを現場で簡単に調節できる実用的な工事用足場吊具を提供することにある。
【０００５】
【課題を解決するための手段】
上記目的を達成するため本発明は、吊り条体として編組構造の繊維ロープを使用し、該編組繊維ロープは、長手方向一端に吊持用連結部を備える一方、中間部適所には長手方向他端側をロープそれ自体の側部から中心の空洞を通って別位置のロープ側部から導出した長さ調整部を有しており、前記長さ調整部より下部側の２股に別れた該編組繊維ロープエンドレス状部分には、編組繊維ロープよりも相対的に太くかつ編組繊維ロープよりも密な編組構造の繊維ロープを切断して構成された桁部材受支部体を位置変位可能に外装していることを特徴としている。
【０００６】
編組繊維ロープは、高強力低伸度の特性を有する繊維から構成されたものが好ましい。
【０００７】
【発明の実施の形態】
以下添付図面を参照して本発明の実施例を説明する。
図１は本発明による工事用足場吊具の適用例を示しており、１は鉄橋の橋桁で、車両の線路が敷設された上部桁１ａと、これと剛結された下部桁１ｂとを有している。前記橋桁１には高圧電線９が敷設されている。
２、２は本発明の工事用足場吊具で、それぞれ前記橋桁１に上端が連結支持され、下部に単管と称される桁部材３が受支され、桁部材３上に足場板４が交差状に載置されている。
【０００８】
図２ないし図５は本発明の工事用足場吊具の第１実施例を示しており、５は吊り条体としての編組構造からなる繊維ロープである。
該編組繊維ロープ５は所定の長さたとえば２〜３ｍを持ち、長手方向の一端部側は橋桁１の適所に連結して吊持を受けるための連結部６を有し、他端部５１は編組繊維ロープ５それ自体の側部に形成した長さ調整部７を貫いて外部に延在している。したがって、長さ調整部７よりも上部側は単一のロープ部分５ａとなり、長さ調整部７より下部側は２股に別れたエンドレス状部分５ｂとなっている。そして、前記連結部６と長さ調整部７の間には柔軟で電気絶縁性のある桁部材受支部体８が位置変位可能に配されている。他端部５１の先端はストランドがバラケないようにテープ巻き等によって被覆５１０が施されている。
【０００９】
前記編組繊維ロープ５は、好適には、汎用の繊維ではなく、破断強度２０ｇ／d以上、弾性係数５００ｇ／ｄ以上の特性を有する高強度低伸度繊維たとえば全芳香族ポリエステル繊維、アラミド繊維、超高分子量ポリエチレン繊維などが原料糸として作られている。
そして、そうした高強度低伸度繊維のヤーンを多数本集めた束を平行に引き揃えるかまたは長いリードで撚りあわせたストランド５０を１本づつまたは複数本を１組とし、かかるストランドを編組して編組繊維ロープ５としている。図示するものは、１２打ち(２×６)であるが、１×１２でもよいし、８つ打ち(２×４)、１×８，１６打ち(２×８)などであってもよい。
【００１０】
前記連結部６は、この例ではフック状の金具を定着して構成されているが、これに限らず、シンブル付きアイスプライス、シンブルなしスプライスであってもよい。
【００１１】
長さ調整部７は図３と図４に示されている。この長さ調整部７は、編組繊維ロープ５が軸方向に引張力のかかった状態では図４図(ｂ)のように各組ストランド５０が接近して見かけ上は中実状を呈するが、実質は中空構造である組織の特徴を利用して形成されたもので、図３のように所望位置の組ストランド５０’、５０’相互間を押し広げて開口７０を形成し、この開口７０から所望距離隔てた位置でも組ストランド５０’、５０’相互間を押し広げて開口７１を形成し、編組繊維ロープ５の他端部５１を前記開口７０から編組繊維ロープ５の空洞部７２内に差込み、その後開口７１から外部へと導出させてなる。
前記調整部７は編組繊維ロープ５のどの部位に設けることができるし、複数設けることもできる。また長さも自由に設定することができる。
【００１２】
桁部材受支部体８は編組繊維ロープ５を内抱して２重となり、強度と径を増加させる。かかる桁部材受支部体８は、電気絶縁性を有しかつ桁部材３の輪郭に添えるように柔軟であることが必要である。
この例では、編組繊維ロープ５よりも密な編組構造の太い繊維ロープを切断して構成され、図５のように編組繊維ロープ５を囲むように外嵌されている。この場合の繊維としては、耐摩耗性の良好な特性を有することが好ましいので、前記のような高強度低伸度繊維のほか、ポリエステル繊維などが用いられ、編組繊維ロープ５が１２打ちであれば、それよりも細い径のストランドを用いた２４打ち、あるいは４８打ちに編組されたものが使用される。
【００１３】
しかし、桁部材受支部体８は編組繊維筒のほか、布製ホースの切断物、ゴムホースの切断物なども使用できる。
さらに、桁部材受支部体８は使用時に編組繊維ロープ５を筒状に囲んでいればよいので、必ずしも単体の状態で筒である必要はなく、図６(ａ)（ｂ）のように筒状化可能でその状態を維持できる平ベルトであってもよい。
平ベルトは多重に積層しあるいは詰め物をした帆布、ゴム、軟質樹脂シート、目の詰んだ織物など電気絶縁性を有する材質からなり、側部に留め要素８０，８１を有している。留め要素８０，８１は細かい繊維を無数に植え立てた面ファスナー、ジッパー、ホック、紐など任意である。
【００１４】
本発明は前記実施例に限定されるものではなく、種々の態様を取りうる。たとえば、桁部材受支筒８が編組構造である場合、ウレタンなどの耐摩耗性の高い樹脂類の被覆を有していてもよい。
編組繊維ロープ５はダメージの程度を知ることができるようにするため、基本的には被覆されないが、場合によっては、長さ調整部７を除いてウレタンなどの耐摩耗性の高い被覆を有していてもよい。
【００１５】
【実施例の作用】
実施例のものの使用法と作用を説明すると、左右で１組となった吊具２，２のそれぞれが長さ調整部７から上側が１本のロープ部分５ａに、また長さ調整部７から下側がエンドレス状部５ｂとなっているので、橋桁１を塗装したりする場合には、編組繊維ロープ上端の連結部６を橋桁１又はその付属構造物に連結し、U状をなしている中間の桁部材受支部体８に桁部材３を渡して受支させる。こうしたセットを図１の紙面に対し直角方向に所定間隔ごとに設け、各桁部材３に交差状に足場板４を渡すことで吊足場が得られる。
【００１６】
吊持状態では、編組繊維ロープ５が桁部材３と直接接触せず、桁部材受支部体８が桁部材３と接しているので、編組繊維ロープ５が擦れで損傷されず、耐久性を良好にすることができる。桁部材受支部体８緻密な組織の編組体からなる場合、編組繊維ロープ５となじみがよく、程よい摩擦抵抗でみだりに長手方向に移動せず、自転もせず、それでいて要時には筒長手方向両端から圧縮することで拡径して編組繊維ロープ５と隙間ができるので、後述する調整時に桁部材の受支位置変化に対応するように編組繊維ロープ５に沿って容易に位置をずらすことができる。
【００１７】
さらに、編組繊維ロープ５と長さ調整部７及び桁部材受支部体８が電気絶縁体であるため、近傍に高圧電線９が走っていても、誘導電流を誘発させない。また連結部６が金属製の金具であってもこれから下方には二次電流を伝達させない。したがって作業員が感電するようなことがなく、安全に作業を営むことができる。また、さびも発生しないので、後始末や保管も容易である。
【００１８】
本発明は吊条体が編組繊維ロープ５からなっているので、チェーンに比べて１/５以上軽く、また柔軟でコンパクトに折り畳めるため、小スペースで収納できるとともに、倉庫から現場基地への運搬、現場基地から吊り場所への持ち運び、吊場所でのセットが非常に容易で、労力と時間を軽減できる。
【００１９】
また、長さ調整部７が編組繊維ロープ特有の空洞構造を利用してロープ側部から空洞にロープ自由端側を挿し込み任意の空洞から取出すことで構成されているので、軸方向に引張り力を付加しない状態でロープ自由端側５１を引張るだけのきわめて簡単な操作によって、図７(ａ)（ｂ）のように、長さすなわち吊基端としての連結部６から受支部までの距離L１、L２を無段階で調整することができる。しかも、桁部材受支部体８は受支部位の変化に応じて編組繊維ロープ５に沿って位置を移動することができる。
したがって、相対する桁部材受支部分の高さレベルを現場で簡単かつ正確に設定することができ、図１のように連結部６を連結する橋桁などの対象物部位の高さレベルが左右で異なっていても、桁部材３とこの上の足場板４を水平に設置することができる。
【００２０】
こうして吊基端としての連結部６から受支部までの距離L１、L２を調整して桁部材３を支えた場合、編組繊維ロープ５が軸方向に引張られる。このため編組繊維ロープ５のストランドは空洞を喪失する様に径が縮小し、それにより長さ調整部７においては、空洞を画成している外周のストランド群が、挿入されているロープ自由端側を締め付けるので、ストランドの凹凸同士の噛み込みとあいまって強固に摩擦固定され、ずれ移動することがない。
【００２１】
編組繊維ロープ５の原料として高強度低伸度繊維を用いた場合、ワイヤロープ並の引っ張り強さを発揮し、伸びもワイヤーロープ並に小さい。しかも、編組構造であるから非自転性であり、ねじれも生じない。したがってこれらにより、桁部材３とこの上の足場板４を安定して支えることができる。
なお、編組繊維ロープ５を被覆しない場合、外観を観察することで塗料等の付着、ヤーンの切断、ヤーンの飛び出し等のダメージの程度を判別することができ、それにより適切な交換時期を決定することができ、十分な安全管理を行える。本発明の足場吊具は、必ずしも橋梁の橋桁に対する関係工事に限定されず、電路工事、建設工事、土木工事など広く利用できる。
【００２２】
【発明の効果】
以上説明した本発明の請求項１によるときには、吊り条体として編組構造の繊維ロープ５を使用し、該編組繊維ロープ５は、長手方向一端に吊持用連結部６を備える一方、中間部適所には長手方向他端側をロープそれ自体の側部から中心の空洞を通って別位置のロープ側部から導出した長さ調整部７を有しており、前記長さ調整部７より下部側の２股に別れた該編組繊維ロープエンドレス状部分５ｂには、編組繊維ロープよりも相対的に太くかつ編組繊維ロープ５よりも密な編組構造の繊維ロープを切断して構成された桁部材受支部体８を位置変位可能に外装しているので、次のようなすぐれた効果が得られる。
【００２３】
１)軽量かつコンパクトに折り畳めるので、運搬、持ち運び、現場での設置作業が容易である。
２)吊り条体が電気絶縁性の繊維ロープ５からなり、長さ調整部７および桁部材受支部体８もともに編組繊維であるから、構造物の吊持位置の近傍に高圧電線があっても誘導電流を誘発せず、吊り条体に触れてもまた足場板４からも感電などの事故が起こらず、電気的にも安全である。
というすぐれた効果が得られる。
３)長さ調整部７から編組繊維ロープ５の他端側を引き出し、桁部材受支部体８の位置を適当にずらすだけのきわめて簡単な操作で桁部材３の受支高さ位置を現場で自在に調節でき、かつ長さ調整部７はロープの引張りによって差し込まれているロープ他端側部分をタイトに緊締するので調整位置がずれることがなく、ロープが非自転性であることとあいまって桁部材３と足場板４を適正な高さ位置で確実、安定して支持できる。
【００２４】
４)桁部材３に編組繊維ロープ５が直接接触せず、相対的に太い桁部材受支部体８が桁部材３に接触するので、擦れ等による繊維ロープ５の傷みが防止され、耐久性を上げることができる。
しかも太い桁部材受支部体８は、編組繊維ロープよりも相対的に太く編組繊維ロープ５よりも密な編組構造の太い繊維ロープを切断して構成されているので、構造が簡単でまた桁部材３の受支高さ位置の変化に即応するように移動でき、しかも編組繊維ロープ５となじみがよく、程よい摩擦抵抗でみだりに長手方向に移動せず、回転もせず、それでいて長手方向両端から圧縮することで拡径し編組繊維ロープ５と隙間ができるので、桁部材の受支位置変化に対応するように編組繊維ロープ５に沿って容易に位置をずらすことができる。
【００２５】
請求項２によれば、編組繊維ロープ５が高強力低伸度繊維からなっているので、軽量でありながらチェーンに匹敵する強度と少ない伸びが得られ、調整位置で桁部材３と足場板４を確実、安定して支持できる。
【図面の簡単な説明】
【図１】本発明による工事用足場吊具の使用状態を例示した説明図である。
【図２】本発明による工事用足場吊具の実施例を示す斜視図である。
【図３】長さ調整部の拡大平面図である。
【図４】 (ａ)は図３のａ―ａ線に沿う断面図、(ｂ)は同じくｂ−ｂ線に沿う断面図である。
【図５】図２のｃ−ｃ線に沿う拡大断面図である。
【図６】 (ａ)は本発明における桁部材受支部体の他の例を示す斜視図、(ｂ)は使用状態の断面図である。
【図７】 (ａ)と（ｂ）は本発明における高さ調整状態を比較して示す模式図である。
【符号の説明】
３桁部材
４足場板
５編組繊維ロープ
６連結部
７長さ調整部
８桁部材受支部体[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a scaffold for construction work.
[0002]
[Prior art]
Suspension scaffolds are used in constructions where workers work in a hollow position, for example, inspecting, painting, or repairing railway and road bridge girders.
As a means for obtaining such a suspension scaffold, a chain is conventionally used, the middle of the chain is inverted in a U shape, fixed to the structure at the upper end of the chain, and such a set is also arranged on the opposite side to form a pair The U-turn part supports both ends of the girders, and these are arranged at predetermined intervals, and a scaffolding plate is crossed over each girdler.
[0003]
However, the prior art scaffold suspension has the following problems.
1) Since the weight of the hanging tool is heavy, a lot of labor and time are required at each stage of transportation, carrying and setting of many hanging tools necessary for the construction.
2) It is difficult to easily adjust the suspension height position of the scaffold board (girder tube) on site.
3) High-voltage overhead wires are often laid on bridge girders, etc., but since the chain is made of steel, an induced current is induced, resulting in an electric shock accident.
[0004]
[Problems to be solved by the invention]
The present invention has been made to solve the above-mentioned problems, and the object of the present invention is to be lightweight and compact, easy to carry and carry, electrically safe, and with a lifting height of the scaffold plate. The purpose of this invention is to provide a practical construction scaffolding that can be easily adjusted on site.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention uses a braided fiber rope as a suspension, and the braided fiber rope is provided with a suspension connecting portion at one end in the longitudinal direction, while the longitudinal portion and the like are disposed at appropriate positions in the intermediate portion. It has a length adjusting part that is led from the side of the rope itself from the side of the rope itself through the central cavity to the rope side part at another position, and is divided into two forks on the lower side from the length adjusting part The braided fiber rope endless part is sheathed with a girder member receiving part body that is formed by cutting a fiber rope having a braided structure that is relatively thicker than the braided fiber rope and denser than the braided fiber rope. It is characterized by having.
[0006]
The braided fiber rope is preferably composed of fibers having high strength and low elongation characteristics.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows an application example of a construction scaffold suspension according to the present invention. Reference numeral 1 denotes a bridge girder of an iron bridge having an upper girder 1a on which a vehicle track is laid and a lower girder 1b rigidly connected thereto. is doing. A high-voltage electric wire 9 is laid on the bridge girder 1.
Reference numerals 2 and 2 are construction scaffold suspensions according to the present invention, the upper ends of which are connected to and supported by the bridge girder 1, and a girder member 3 called a single pipe is supported at the lower part, and a scaffold plate 4 is placed on the girder member 3. It is placed in a cross shape.
[0008]
FIGS. 2 to 5 show a first embodiment of the construction scaffold lifting tool of the present invention, and 5 is a fiber rope having a braided structure as a suspension strip.
The braided fiber rope 5 has a predetermined length, for example, 2 to 3 m, one end portion in the longitudinal direction has a connecting portion 6 for receiving the suspension by connecting to an appropriate position of the bridge girder 1, and the other end portion 51 The braided fiber rope 5 extends outside through a length adjusting portion 7 formed on the side portion of the braided fiber rope 5 itself. Therefore, the upper side of the length adjusting portion 7 is a single rope portion 5a, and the lower side of the length adjusting portion 7 is an endless portion 5b divided into two forks. And between the said connection part 6 and the length adjustment part 7, the flexible and electrically insulating girder member support part body 8 is distribute | arranged so that position displacement is possible. The tip of the other end 51 is covered with a tape 510 or the like so that the strands do not break.
[0009]
The braided fiber rope 5 is preferably not a general-purpose fiber, but a high-strength low-elongation fiber having properties of a breaking strength of 20 g / d or more and an elastic modulus of 500 g / d or more, such as wholly aromatic polyester fiber, aramid fiber, Ultra high molecular weight polyethylene fiber is made as raw material yarn.
Then, a bundle of a large number of yarns of such high-strength low-stretch fibers is gathered in parallel or twisted with a long lead, one strand 50 or a plurality of strands 50, and the strands are braided. The braided fiber rope 5 is used. What is shown is 12 strokes (2 × 6), but may be 1 × 12, 8 strokes (2 × 4), 1 × 8, 16 strokes (2 × 8), or the like.
[0010]
In this example, the connecting portion 6 is configured by fixing a hook-shaped metal fitting. However, the connecting portion 6 is not limited to this, and may be an ice price with thimble or a splice without thimble.
[0011]
The length adjuster 7 is shown in FIGS. In the state where the braided fiber rope 5 is subjected to a tensile force in the axial direction, the length adjusting portion 7 is substantially solid as it appears as each pair of strands 50 approaches as shown in FIG. 4 (b). Is formed by utilizing the characteristics of the tissue having a hollow structure, and as shown in FIG. 3, an opening 70 is formed by expanding between the paired strands 50 ′ and 50 ′ at a desired position. Even at positions separated by distance, the strands 50 ′ and 50 ′ are spread apart to form an opening 71, and the other end 51 of the braided fiber rope 5 is inserted into the cavity 72 of the braided fiber rope 5 from the opening 70, Thereafter, the light is led out from the opening 71 to the outside.
The adjustment part 7 can be provided in any part of the braided fiber rope 5 or a plurality of adjustment parts 7 can be provided. The length can also be set freely.
[0012]
The girder member support 8 is doubled with the braided fiber rope 5 inside, and increases the strength and diameter. Such a girder member support portion 8 needs to be electrically insulating and flexible so as to be attached to the contour of the girder member 3.
In this example, a thick fiber rope having a denser braid structure than the braided fiber rope 5 is cut, and is externally fitted so as to surround the braided fiber rope 5 as shown in FIG. As the fiber in this case, it is preferable to have a good property of wear resistance. Therefore, in addition to the high-strength low-elongation fiber as described above, polyester fiber or the like is used, and the braided fiber rope 5 should be 12 beats For example, a braided braid of 24 or 48 strokes using a strand having a diameter smaller than that is used.
[0013]
However, the girder member support section 8 may be a braided fiber tube, a cut cloth hose, a cut rubber hose, or the like.
Furthermore, since the girder member support section 8 only needs to surround the braided fiber rope 5 in a cylindrical shape when in use, it is not always necessary to be a single cylinder, and a cylinder as shown in FIGS. 6 (a) and 6 (b). It may be a flat belt that can be shaped and can maintain its state.
The flat belt is made of a material having electrical insulation properties such as multi-layered or padded canvas, rubber, soft resin sheet, clogged woven fabric, and has fastening elements 80 and 81 on the side portions. The fastening elements 80 and 81 are optional, such as hook-and-loop fasteners, zippers, hooks, and strings in which countless fine fibers are planted.
[0014]
The present invention is not limited to the embodiments described above, and can take various forms. For example, when the girder member support cylinder 8 has a braided structure, it may have a coating made of highly wear-resistant resin such as urethane.
The braided fiber rope 5 is basically not covered so that the degree of damage can be known. However, in some cases, the braided fiber rope 5 has a highly wear-resistant coating such as urethane except for the length adjusting portion 7. It may be.
[0015]
[Effect of the embodiment]
The usage and operation of the embodiment will be described. Each of the hanging tools 2 and 2 in a pair on the left and right sides is from the length adjusting portion 7 to the one rope portion 5a on the upper side, and from the length adjusting portion 7. Since the lower side is an endless part 5b, when painting the bridge girder 1, the connecting part 6 at the upper end of the braided fiber rope is connected to the bridge girder 1 or its attached structure, and the middle is formed in a U shape. The spar member 3 is transferred to and supported by the spar member receiving part 8. Such a set is provided at predetermined intervals in a direction perpendicular to the paper surface of FIG. 1, and the scaffolding plate 4 is passed to each girder member 3 in a crossing manner to obtain a suspended scaffold.
[0016]
In the suspended state, the braided fiber rope 5 is not in direct contact with the girder member 3 and the girder member support portion 8 is in contact with the girder member 3, so that the braided fiber rope 5 is not damaged by rubbing and has good durability. Can be. Girder member support body 8 When it is composed of a braided body with a fine structure, it fits well with the braided fiber rope 5, does not move in the longitudinal direction with moderate frictional resistance, does not rotate, and if necessary, is compressed from both ends in the longitudinal direction of the cylinder. By doing so, a gap is formed with the braided fiber rope 5 by expanding the diameter, so that the position can be easily shifted along the braided fiber rope 5 so as to correspond to a change in the receiving position of the girder member at the time of adjustment described later.
[0017]
Furthermore, since the braided fiber rope 5, the length adjusting portion 7 and the girder member support portion 8 are electrical insulators, no induced current is induced even if the high-voltage wire 9 is running in the vicinity. Even if the connecting portion 6 is a metal fitting, the secondary current is not transmitted downward. Therefore, there is no electric shock of the worker, and the work can be performed safely. In addition, since no rust is generated, cleaning and storage are easy.
[0018]
In the present invention, since the suspending body is composed of the braided fiber rope 5, it is 1/5 or more lighter than the chain, flexible and compactly foldable, so that it can be stored in a small space and transported from the warehouse to the site base. Carrying from the site base to the hanging place and setting at the hanging place are very easy, reducing labor and time.
[0019]
Moreover, since the length adjusting part 7 is configured by inserting the rope free end side into the cavity from the rope side part using the hollow structure peculiar to the braided fiber rope and taking out from the arbitrary cavity, the tensile force in the axial direction As shown in FIGS. 7 (a) and 7 (b), the length L1, that is, the distance L1 from the connecting portion 6 as the suspension base end to the receiving portion is obtained by an extremely simple operation by simply pulling the rope free end side 51 without adding a cable. , L2 can be adjusted steplessly. Moreover, the position of the girder member support section 8 can be moved along the braided fiber rope 5 in accordance with changes in the support site.
Therefore, the height level of the opposite girder member receiving portions can be set easily and accurately on site, and the height level of the object part such as a bridge girder connecting the connecting portion 6 as shown in FIG. Even if they are different, the girder member 3 and the scaffolding plate 4 thereon can be installed horizontally.
[0020]
Thus, when the distance L1 and L2 from the connection part 6 as a suspension base end to the receiving part is adjusted and the girder member 3 is supported, the braided fiber rope 5 is pulled in the axial direction. For this reason, the diameter of the strands of the braided fiber rope 5 is reduced so that the cavities are lost, so that in the length adjusting section 7, the outer peripheral strand groups defining the cavities are inserted into the free end of the rope. Since the side is tightened, it is firmly fixed by friction with the engagement of the irregularities of the strands and does not shift.
[0021]
When high-strength low-elongation fibers are used as the raw material for the braided fiber rope 5, the tensile strength is as high as that of a wire rope, and the elongation is as low as that of the wire rope. Moreover, since it has a braided structure, it is non-spinning and does not twist. Therefore, these can stably support the girder member 3 and the scaffolding plate 4 thereon.
When the braided fiber rope 5 is not covered, it is possible to determine the extent of damage such as adhesion of paint, cutting of yarn, jumping out of yarn, etc. by observing the appearance, thereby determining an appropriate replacement time. And sufficient safety management. The scaffold hanging tool of the present invention is not necessarily limited to the construction related to the bridge girder of the bridge, and can be widely used such as electric circuit construction, construction work, and civil engineering work.
[0022]
【The invention's effect】
According to the first aspect of the present invention described above, a braided fiber rope 5 is used as a suspending body, and the braided fiber rope 5 includes a suspension connecting portion 6 at one end in the longitudinal direction, while an intermediate portion is in place. Has a length adjusting portion 7 in which the other end in the longitudinal direction is led out from the side of the rope itself through the central cavity and from the side of the rope at a different position. The braided fiber rope endless portion 5b divided into two forks is a girder member receiver formed by cutting a fiber rope having a braid structure that is relatively thicker than the braided fiber rope and denser than the braided fiber rope 5. Since the support body 8 is packaged so as to be displaceable, the following excellent effects can be obtained.
[0023]
1) Lightweight and compact, it can be easily transported, carried and installed on site.
2) Since the suspending body is made of an electrically insulating fiber rope 5 and the length adjusting portion 7 and the girder member receiving portion 8 are both braided fibers, there is a high-voltage electric wire near the suspension position of the structure. However, no induced current is induced, no accident such as an electric shock occurs from the scaffolding plate 4 even when the suspended strip is touched, and it is electrically safe.
The excellent effect is obtained.
3) Pull the other end side of the braided fiber rope 5 from the length adjusting section 7 and set the support height position of the girder member 3 in the field by a very simple operation by appropriately shifting the position of the girder member support section body 8. The length adjustment part 7 can be freely adjusted, and the other end side of the rope that is inserted by pulling the rope is tightly tightened, so that the adjustment position does not shift and the rope is non-rotating. The girder member 3 and the scaffold plate 4 can be reliably and stably supported at an appropriate height position.
[0024]
4) Since the braided fiber rope 5 is not in direct contact with the girder member 3 and the relatively thick girder member support portion 8 is in contact with the girder member 3, damage to the fiber rope 5 due to rubbing or the like is prevented and durability is improved. Can be raised.
Moreover, since the thick girder member receiving portion 8 is formed by cutting a thick fiber rope having a braid structure that is relatively thicker than the braided fiber rope and denser than the braided fiber rope 5, the structure is simple and the girder member. 3 is able to move immediately in response to the change in the receiving height position, and it is well adapted to the braided fiber rope 5 and does not move in the longitudinal direction with moderate frictional resistance, does not rotate, and still compresses from both ends in the longitudinal direction. As a result, the diameter of the braided fiber rope 5 is increased and a gap is formed between the braided fiber rope 5 and the position thereof can be easily shifted along the braided fiber rope 5 so as to correspond to the change in the receiving position of the beam member.
[0025]
According to claim 2, since the braided fiber rope 5 is made of high-strength and low-elongation fibers, it is lightweight and can provide strength and low elongation comparable to the chain, and the girder member 3 and the scaffold plate 4 at the adjustment position. Can be supported reliably and stably.
[Brief description of the drawings]
FIG. 1 is an explanatory view exemplifying a use state of a construction scaffolding suspension according to the present invention.
FIG. 2 is a perspective view showing an embodiment of a scaffold for construction work according to the present invention.
FIG. 3 is an enlarged plan view of a length adjusting unit.
4A is a cross-sectional view taken along line aa in FIG. 3, and FIG. 4B is a cross-sectional view taken along line bb in the same manner.
5 is an enlarged cross-sectional view taken along the line cc of FIG.
6A is a perspective view showing another example of a girder member support portion according to the present invention, and FIG. 6B is a sectional view in use.
7A and 7B are schematic views showing a comparison of height adjustment states in the present invention.
[Explanation of symbols]
3 Girder member 4 Scaffold plate 5 Braided fiber rope 6 Connecting portion 7 Length adjusting portion 8 Girder member receiving body

Claims

A braided fiber rope 5 is used as a suspension strip, and the braided fiber rope 5 is provided with a suspension connecting portion 6 at one end in the longitudinal direction, while the other end in the longitudinal direction is placed at an appropriate position in the middle portion. A braided fiber rope endless shape having a length adjusting portion 7 led out from a rope side portion at a different position from a side portion through a central cavity and separated into two forks on the lower side from the length adjusting portion 7 The portion 5b is covered with a girder member receiving portion 8 formed by cutting a fiber rope having a braid structure that is relatively thicker than the braided fiber rope and denser than the braided fiber rope 5 so as to be displaceable. A construction scaffolding suspension characterized by that.

The construction scaffolding hanging tool according to claim 1, wherein the braided fiber rope 5 is made of high strength and low elongation fiber.