JP2022163918A - Main rope locking metal fitting - Google Patents

Main rope locking metal fitting Download PDF

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JP2022163918A
JP2022163918A JP2021069054A JP2021069054A JP2022163918A JP 2022163918 A JP2022163918 A JP 2022163918A JP 2021069054 A JP2021069054 A JP 2021069054A JP 2021069054 A JP2021069054 A JP 2021069054A JP 2022163918 A JP2022163918 A JP 2022163918A
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metal fitting
locking
main rope
clamp
fitting
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和男 岡本
Kazuo Okamoto
公彦 藤本
Kimihiko Fujimoto
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Sekisui House Ltd
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Sekisui House Ltd
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Abstract

To provide a main rope locking metal fitting for locking a main rope on a pillar made of a square steel tube with a short pipe diameter, the main rope locking metal fitting making it possible to easily lock the main rope on the pillar without damaging the pillar's surface.SOLUTION: A main rope locking metal fitting 1, a metal fitting for locking a main rope B on a pillar A made of a steel tube, comprises: a clamp 2 that is disposed on an outside surface A1 of the pillar A and pinches the pillar A; a locking ring 3 that is fixed on a side surface 23e of the clamp 2 and protrudes in a direction opposite to the pillar A to lock the main rope B; and an elastic body 4 that is fixed on the clamp 2 and closes a gap between the clamp 2 and the outside surface A1 of the pillar A.SELECTED DRAWING: Figure 6

Description

本発明は、角形鋼管からなる支柱に親綱を係止させるための親綱係止金具に関する。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main rope locking fitting for locking a main rope to a post made of square steel pipe.

一般的に、遂転落防止器具用の親綱をＨ型鋼からなる支柱に固定する場合、クランプ状の固定金具を支柱のフランジに狭着固定し、親綱のロープ両端に固定されたフックを固定金具に係止させる方法が知られている。しかしながら、支柱がフランジのない角形鋼管からなる場合は前記固定金具を固定することができないため、支柱の外側面にベルトを巻いて締付け、ベルト本体の係止環に親綱のフックを掛ける方法が提案されている（例えば、特許文献１）。 In general, when a main rope for fall prevention equipment is fixed to a post made of H-shaped steel, a clamp-like fixing metal fitting is narrowly fixed to the flange of the post, and hooks fixed to both ends of the rope of the main rope are fixed. A method of locking to metal fittings is known. However, if the strut is made of square steel pipe without a flange, it is not possible to fix the metal fixture. It has been proposed (for example, Patent Document 1).

特許文献１の発明には、角形鋼管からなる支柱に巻き付けるベルトと、ベルトの両端を支持し、且つ、ベルトの長さを調整する本体と、を備える親綱用の支持装置について開示されている。この発明では、本体に設置されたラチェットギアに係合する係合部を回転させることでベルトの長さを支柱の管径に応じて調整することができる。 The invention of Patent Document 1 discloses a supporting device for a main rope, which includes a belt wound around a post made of square steel pipe, and a main body that supports both ends of the belt and adjusts the length of the belt. . In this invention, the length of the belt can be adjusted according to the pipe diameter of the strut by rotating the engaging portion that engages with the ratchet gear provided on the main body.

しかしながら上述の支持装置は、太い柱に適したラチェット機構を採用した締付具であるため外形が大きく、低層住宅に使用される細い管径の支柱にそのまま使用することが難しい。その結果、管径が細い支柱に対しては、親綱を直接巻き付ける方法を取らざるを得ない場合があるが、この固定方法は、強度が不足している綱や紐などを支柱に巻き付けるだけであるため、作業員が落下した際に、親綱が衝撃荷重に耐えられず切れてしまったり支柱から滑り落ちてしまう可能性が高い。この問題を解決するための発明が特開２００６－１１００９０号公報に開示されている。この発明には、トグル機構とバックル部を備えた親綱連結用台付けベルトについて記載されており、比較的コンパクトなバックル部を操作することでベルトの長さを自由に調整することができるため、管径が細い角形鋼管からなる支柱にも親綱連結用台付けベルトを取付けることが可能となっている。 However, since the above-described supporting device is a tightening tool that employs a ratchet mechanism suitable for thick columns, it has a large outer shape and is difficult to use as it is for columns with a small pipe diameter used in low-rise housing. As a result, it may be necessary to use a method of directly wrapping the main rope around a pole with a small pipe diameter. Therefore, when a worker falls, there is a high possibility that the main rope will not be able to withstand the impact load and will break or slip off the support. An invention for solving this problem is disclosed in Japanese Patent Application Laid-Open No. 2006-110090. This invention describes a base belt for connecting a main rope, which has a toggle mechanism and a buckle part, and the length of the belt can be freely adjusted by operating the relatively compact buckle part. It is possible to attach a base belt for connecting the master rope to a support made of square steel pipe with a small pipe diameter.

特開２０１０－８４４２０号公報JP-A-2010-84420 特開２００６－１１００９０号公報Japanese Patent Application Laid-Open No. 2006-110090

ところで、建築物の構造材でもある角形鋼管柱は、表面に防錆塗料や耐火塗料などの塗料が塗布されているため、施工時における塗膜の損傷を防ぐ必要があり、また万が一塗膜が損傷した場合は補修をしなければならない。しかしながら、特許文献２に記載の発明は、ベルトの長さを調整する金具部分が支柱に直接触れるため、ベルトを締付けた際に金具部分で支柱の塗膜を傷つける虞がある。 By the way, square steel pipe columns, which are also structural materials for buildings, are coated with anti-rust paint, fire-resistant paint, etc. on the surface, so it is necessary to prevent damage to the paint film during construction. If damaged, it must be repaired. However, in the invention described in Patent Document 2, the metal fittings for adjusting the length of the belt are in direct contact with the struts.

そこで、本発明は上述した課題を鑑みてなされたものであって、管径が細い角形鋼管からなる支柱に親綱を係止させる金具であって、支柱の表面を傷つけることなく容易、且つ確実に支柱に設置可能な親綱係止金具を提供することを目的とする。 Therefore, the present invention has been made in view of the above-mentioned problems, and is a metal fitting for locking a main rope to a post made of a square steel pipe with a small pipe diameter, which can be easily and reliably installed without damaging the surface of the post. To provide a main rope locking metal fitting that can be installed on a support post.

本発明の第１の親綱係止金具は、鋼管からなる支柱に、親綱を係止させるための親綱係止金具であって、前記支柱の外側面に配置され、前記支柱を挟み込むクランプと、前記クランプの側面に固定されるとともに前記支柱と反対の方向へ突出し、前記親綱を係止させる係止環と、前記クランプに固定され、当該クランプと前記支柱の外側面との間を閉塞する弾性体と、を備えることを特徴としている。 A first main rope locking fitting of the present invention is a main rope locking fitting for locking a main rope to a support made of a steel pipe, and is arranged on the outer surface of the support, and is a clamp that sandwiches the support. and a locking ring that is fixed to the side surface of the clamp and protrudes in the direction opposite to the support to lock the master rope; and a closing elastic body.

本発明の第２の親綱係止金具は、前記係止環が、水平方向へ延びる金板に、板厚方向へ貫通する孔を形成してなることを特徴としている。 The second master rope locking fitting of the present invention is characterized in that the locking ring is formed by forming a hole penetrating in the plate thickness direction in a metal plate extending in the horizontal direction.

本発明の第３の親綱係止金具は、前記支柱が角形鋼管であり、前記クランプが、前記支柱の角部に配置されるＬ字形状の第１金具と、当該第１金具の水平方向の一端部に水平方向へ回動自在に固定されるボルトと、前記第１金具の水平方向の他端部に水平方向へ回動自在に固定され、前記ボルトの先端部に挿通される第２金具と、前記第２金具から突出した前記ボルトに螺着するナットと、を有し、前記係止環が、前記第２金具の側面に固定されることを特徴としている。 In the third master rope locking fitting of the present invention, the strut is a square steel pipe, and the clamp includes an L-shaped first fitting arranged at a corner of the strut and a horizontal direction of the first fitting. A bolt that is horizontally rotatably fixed to one end, and a second that is horizontally rotatably fixed to the other horizontal end of the first metal fitting and inserted through the tip of the bolt. It has a metal fitting and a nut that is screwed onto the bolt projecting from the second metal fitting, and the locking ring is fixed to the side surface of the second metal fitting.

本発明の第４の親綱係止金具は、前記弾性体が、少なくとも前記第２金具と、前記第１金具の前記第２金具に相対向する部分とに固定されることを特徴としている。 A fourth master rope locking metal fitting of the present invention is characterized in that the elastic body is fixed to at least the second metal fitting and a portion of the first metal fitting facing the second metal fitting.

本発明の第１の親綱係止金具によると、クランプに固定される弾性体は、クランプと支柱の外側面との間を閉塞するとされる。したがって、弾性体による摩擦力によって親綱係止金具が支柱から滑り落ちることを効果的に抑制することができ、また支柱の外側面に傷がつくことを防止できる。 According to the first master rope locking fitting of the present invention, the elastic body fixed to the clamp closes the space between the clamp and the outer surface of the strut. Therefore, it is possible to effectively prevent the main rope locking fitting from slipping down from the post due to the frictional force of the elastic body, and to prevent the outer surface of the post from being damaged.

本発明の第２の親綱係止金具によると、係止環は、水平方向へ延びる金板に、板厚方向へ貫通する孔を形成してなるとされる。したがって、下方向への強い衝撃力が親綱に加わると、係止環が下方へ曲がって衝撃負荷を吸収するため親綱係止金具自体が支柱から滑り落ちることを効果的に抑制することができる。 According to the second master rope locking fitting of the present invention, the locking ring is formed by forming a hole penetrating in the plate thickness direction in the metal plate extending in the horizontal direction. Therefore, when a strong downward impact force is applied to the main rope, the locking ring bends downward to absorb the impact load, so that the main rope locking fitting itself can be effectively prevented from slipping down from the strut. .

本発明の第３の親綱係止金具によると、係止環は第２金具に固定されるので、親綱係止金具を支柱に設置した状態で支柱の第１金具側に外壁材を設置することができ、施工性を向上させることができる。 According to the third main rope locking metal fitting of the present invention, since the locking ring is fixed to the second metal fitting, the outer wall material is installed on the first metal fitting side of the post while the main rope locking metal fitting is installed on the post. It is possible to improve workability.

本発明の第４の親綱係止金具によると、弾性体は、少なくとも第２金具と、第１金具の第２金具に相対向する部分とに固定される。したがって、係止環が親綱から伝搬する衝撃負荷を受けた際に、親綱係止金具が支柱から滑り落ちる事をより効果的に抑制することができる。 According to the fourth master rope locking fitting of the present invention, the elastic body is fixed to at least the second fitting and the portion of the first fitting facing the second fitting. Therefore, when the locking ring receives an impact load propagated from the master rope, it is possible to more effectively prevent the master rope locking fitting from slipping down from the strut.

親綱係止金具の平面図。The top view of a master rope locking metal fitting. 図１のＷ―Ｗ線断面図。WW line cross-sectional view of FIG. 図１のＸ－Ｘ線断面図。XX line cross-sectional view of FIG. 親綱を一対の支柱に設置した状態を示す正面図。The front view which shows the state which installed the master rope in a pair of support|pillar. 図４のＹ部分拡大図。Y partial enlarged view of FIG. 図５のＺ－Ｚ線断面図。A cross-sectional view taken along the line ZZ of FIG. 親綱係止金具を支柱に固定した状態で、外壁材を設置した様子を示す平面図。The top view which shows a mode that the exterior wall material was installed in the state which fixed the main rope locking metal fitting to the support|pillar. 垂直落下性能試験の構成図。The configuration diagram of the vertical drop performance test.

以下、本発明の親綱係止金具の最良の実施形態について各図を参照しつつ説明する。本願の親綱係止金具は、管径が比較的細い角形鋼管柱に固定される金具であり、主に低層住宅に用いられる柱材に設置される。なお、本発明における「クランプの側面」、「第１金具の第２金具に相対向する部分」は、本実施形態において、それぞれ「第２金具の側面２３ｅ」、「第１部材２５」が相当する。 BEST MODE FOR CARRYING OUT THE INVENTION The best embodiment of the main rope locking fitting of the present invention will be described below with reference to the drawings. The main rope locking metal fitting of the present application is a metal fitting fixed to a rectangular steel pipe pillar with a relatively small pipe diameter, and is installed mainly on a pillar material used in low-rise housing. In the present embodiment, the "side surface of the clamp" and the "portion of the first metal fitting facing the second metal fitting" correspond to the "side surface 23e of the second metal fitting" and the "first member 25", respectively. do.

親綱係止金具１は、図１及び図６に示すように、角形鋼管からなる支柱Ａに親綱Ｂを係止させるためのものであり、支柱Ａの外側面Ａ１に配置され、支柱Ａを挟み込むクランプ２と、クランプ２に固定されるとともに支柱Ａと反対の方向へ突出し、親綱Ｂを係止させる係止環３と、クランプ２に固定され、当該クランプ２と支柱Ａの外側面Ａ１との間を閉塞する弾性体４と、を備えている。 As shown in FIGS. 1 and 6, the main rope locking fitting 1 is for locking the main rope B to the post A made of square steel pipe, and is arranged on the outer surface A1 of the post A. A clamp 2 that sandwiches the clamp 2, a locking ring 3 that is fixed to the clamp 2 and protrudes in the opposite direction to the support A to lock the master rope B, and is fixed to the clamp 2, the outer surface of the clamp 2 and the support A and an elastic body 4 that closes the space between A1.

図示するように、クランプ２は、支柱Ａの角部Ａ２に配置される平面視Ｌ字形状の第１金具２１と、第１金具２１の水平方向の一端部２ａに水平方向へ回動自在に固定されるボルト２２と、第１金具２１の水平方向の他端部２ｂに水平方向へ回動自在に固定され、ボルト２２の先端部２２ａに挿通される第２金具２３と、第２金具２３から突出したボルト２２に螺着するナット２４と、を有しており、閉じると略四角形の開口が形成される。 As shown in the figure, the clamp 2 is horizontally rotatable on a first metal fitting 21 having an L shape in a plan view, which is arranged at a corner A2 of the post A, and one end 2a of the first metal fitting 21 in the horizontal direction. A bolt 22 to be fixed, a second metal fitting 23 fixed to the other horizontal end portion 2b of the first metal fitting 21 so as to be rotatable in the horizontal direction and inserted through the tip portion 22a of the bolt 22, and the second metal fitting 23. and a nut 24 screwed onto a bolt 22 protruding from the opening to form a substantially square opening when closed.

平面視Ｌ字形状の第１金具２１は、図１から図３に示すように、内側に開口する断面視Ｃ字形状の金具であり、ボルト２２と連結固定され、水平方向へ延びる第１部材２５と、平面視において第１部材２５と直交する方向へ延び、第２金具２３と連結固定される第２部材２６と、から構成される。またボルト２２は、軸方向を水平方向へ向けた状態で、基端部２２ｂを第１金具２１の一端部２ａ側の第１溝２１ａに嵌め込まれており、垂直方向へ延びる軸棒２７で第１部材２５とともに貫通されることによって第１金具２１に連結固定される。 As shown in FIGS. 1 to 3, the L-shaped first fitting 21 in plan view is a C-shaped fitting in cross section that opens inward, is connected and fixed to the bolt 22, and is the first member extending in the horizontal direction. 25 and a second member 26 extending in a direction perpendicular to the first member 25 in plan view and connected and fixed to the second metal fitting 23 . The bolt 22 has its base end 22b fitted in the first groove 21a on the side of the one end 2a of the first metal fitting 21 with its axial direction directed horizontally. It is connected and fixed to the first metal fitting 21 by being penetrated together with the first member 25 .

平面視略一直線状に延びる第２金具２３は、内側に開口する断面視Ｃ字形状の金具であり、水平方向の一端部２３ａが、相対向する第１部材２５側へやや突出する形状となっている。第２金具２３は、水平方向の他端部２３ｂの高さが第１金具２１の第１溝２１ａの幅以下となっており、他端部２３ｂを第１金具２１の他端部２ｂ側の第１溝２１ａに嵌合させ、軸棒２７で第１金具２１及び第２金具２３を貫通することにより、第２金具２３を第１金具２１に連結固定することができる。なお、ボルト２２及び第２金具２３は、軸棒２７を中心に回動自在にとなっている。また第２金具２３は、水平方向の一端２３ｃから他端部２３ｂ側へ延びる切欠き溝２３ｄが形成されており、この切欠き溝２３ｄにボルト２２の先端部２２ａを嵌め込むことができる。なお図示するように、ボルト２２は、切欠き溝２３ｄに嵌合した際に先端２２ｃが第２金具２３から突出する長さを有しており、この突き出た部分にナット２４を螺着させることができる。 The second metal fitting 23 extending substantially in a straight line when viewed from above is a metal fitting having a C-shaped cross section that opens inward, and one end portion 23a in the horizontal direction slightly protrudes toward the opposing first member 25 side. ing. The height of the other end 23b in the horizontal direction of the second metal fitting 23 is equal to or less than the width of the first groove 21a of the first metal fitting 21, and the other end 23b is positioned at the other end 2b side of the first metal fitting 21. The second metal fitting 23 can be connected and fixed to the first metal fitting 21 by fitting it into the first groove 21 a and penetrating the first metal fitting 21 and the second metal fitting 23 with the axial rod 27 . In addition, the bolt 22 and the second metal fitting 23 are rotatable around the shaft rod 27 . The second metal fitting 23 is formed with a notch groove 23d extending from one end 23c in the horizontal direction to the other end 23b side, and the tip portion 22a of the bolt 22 can be fitted into the notch groove 23d. As shown in the figure, the bolt 22 has a length such that the tip 22c protrudes from the second metal fitting 23 when fitted into the notch groove 23d, and the nut 24 is screwed onto this protruding portion. can be done.

クランプ２の大きさは特に限定されないが、第１部材２５の外側面２５ａから第２金具２３の外側面２３ｅまでの距離、及び第２部材２６の外側面２６ａからボルト２２の外側面２２ｄまでの距離は、１００ｍｍ～１５０ｍｍ程度とすることが望ましい。このような大きさであれば、１人作業でも容易に親綱係止金具１を支柱Ａに設置することができる。またクランプ２を閉じて形成される開口２Ａは、図１に示す第１部材２５から第２金具２３までの第１距離Ｌ１、及び第２部材２６から第２金具２３の一端部２３ａまでの第２距離Ｌ２が、支柱Ａの管径よりも長くなっている。 Although the size of the clamp 2 is not particularly limited, the distance from the outer surface 25a of the first member 25 to the outer surface 23e of the second metal fitting 23 and the distance from the outer surface 26a of the second member 26 to the outer surface 22d of the bolt 22 are It is desirable that the distance is about 100 mm to 150 mm. With such a size, the main rope locking fitting 1 can be easily installed on the post A even by one person. The opening 2A formed by closing the clamp 2 has a first distance L1 from the first member 25 to the second metal fitting 23 shown in FIG. 2 The distance L2 is longer than the tube diameter of the strut A.

係止環３は、水平方向へ延びるフラットバーに、板厚方向へ貫通する孔３ａを形成してなる部材であり、第２金具２３の外側面２３ｅに溶接固定される。その厚さは５ｍｍ～８ｍｍ程度であり、６ｍｍ程度とすることが望ましい。また弾性を有するゴムなどの弾性体４は、少なくとも第１部材２５の第１溝２１ａと、相対向する第２金具２３の第２溝２３ｆとに貼着され、図６に示すように、クランプ２で支柱Ａを挟んだ際に支柱Ａの外側面Ａ１に当接する厚さを有している。このため、親綱係止金具１を支柱Ａに装着すると、支柱Ａの外側面Ａ１には弾性体４のみが当接しクランプ２が直接当接することはない。 The locking ring 3 is a member formed by forming a through hole 3a in the plate thickness direction in a flat bar extending in the horizontal direction, and is welded and fixed to the outer surface 23e of the second metal fitting 23. As shown in FIG. Its thickness is about 5 mm to 8 mm, preferably about 6 mm. An elastic body 4 such as rubber having elasticity is adhered to at least the first groove 21a of the first member 25 and the second groove 23f of the opposing second metal fitting 23, and as shown in FIG. 2 has a thickness such that it abuts on the outer side surface A1 of the support A when the support A is sandwiched between the two. Therefore, when the main rope locking fitting 1 is attached to the post A, only the elastic body 4 abuts against the outer surface A1 of the post A, and the clamp 2 does not directly abut.

図４に示すように、親綱係止金具１を設置する支柱Ａは、低層住宅のような小規模建築物に使用される構造柱材であり、管径が７５ｍｍ角程度の比較的細い角形鋼管柱である。また支柱Ａは、表面に防錆塗料や耐火塗料などの塗料が塗布されているため、作業員は塗膜が損傷しないよう注意を払いながら作業を行う必要がある。図示するように、支柱Ａは２階以上に設置される梁材Ｃ上に立設しており、水平方向へ１０ｍ以下の間隔を開けて複数設置される。なお構造床材は梁材Ｃ上に未設置の状態であり、隣り合う支柱Ａ間に親綱Ｂを張ることで作業員は自身が装着する墜転落防止器具のランヤード（図示せず）を親綱Ｂに引掛けて高所作業を行うことができる。また、図示例では一対の支柱Ａ間に親綱Ｂを張っているが、支柱Ａ間のスパンが１０ｍ以下であれば３以上の支柱Ａに親綱Ｂを係止させてもよい。その場合は、各支柱Ａに親綱係止金具１を設置し、それぞれの係止環３にシャックルを引掛け、親綱Ｂを各々のシャックルに挿通させればよい。このように、親綱係止金具１を親綱Ｂの両端部支持に使用するだけでなく、親綱Ｂの中間支持にも用いることで、作業員の安全性をより向上させることができる。 As shown in FIG. 4, the pillar A on which the main rope locking metal fitting 1 is installed is a structural pillar material used for small-scale buildings such as low-rise houses, and has a relatively thin square tube diameter of about 75 mm square. It is a steel pipe column. In addition, since the surface of the post A is coated with a paint such as an anticorrosive paint or a fire-resistant paint, workers need to be careful not to damage the paint film during work. As shown in the figure, the pillars A are erected on beams C installed on the second floor or higher, and are installed in plural at intervals of 10 m or less in the horizontal direction. The structural floor material is not installed on the beam material C, and by stretching the main rope B between the adjacent pillars A, the worker can use the lanyard (not shown) of the fall prevention device that he or she wears. It can be hooked on the rope B to perform high-place work. In the illustrated example, the main rope B is stretched between a pair of pillars A, but the main rope B may be anchored to three or more pillars A if the span between the pillars A is 10 m or less. In that case, the main rope locking fitting 1 is installed on each post A, a shackle is hooked on each locking ring 3, and the main rope B is passed through each shackle. In this way, by using the main rope locking metal fittings 1 not only for supporting both ends of the main rope B but also for supporting the middle of the main rope B, the safety of workers can be further improved.

親綱係止金具１を支柱Ａに設置する際は、図５及び図６に示すように、クランプ２で支柱Ａの外側面Ａ１を挟み、第２金具２３の切欠き溝２３ｄにボルト２２を嵌め込むとともに、第２金具２３から突き出したボルト２２の先端部２２ａにナット２４を螺着させて締付けるだけで容易に固定することができる。このとき先述したように、支柱Ａの外側面Ａ１には、クランプ２は当接せず、弾性体４のみが当接するため、外側面Ａ１に塗布された塗料の損傷を効果的に防ぐことができる。なお図７に示すように、支柱Ａの周囲に外壁材Ｄを設置する場合は、第１金具２１を外壁材Ｄ側に向けた状態でクランプ２を締付ければよい。第１金具２１をこのような配置にすれば、外壁材Ｄ設置後、屋内側からナット２４を緩めて親綱係止金具１を容易に取り外すことができる。このように、第１金具２１は平面視Ｌ字形状であるため、外壁材Ｄの角部にも親綱係止金具１を用いることができ、利便性を向上させることができる。 5 and 6, when installing the main rope locking metal fitting 1 on the post A, clamp the outer surface A1 of the post A with the clamp 2, and insert the bolt 22 into the notch groove 23d of the second metal fitting 23. It can be easily fixed simply by screwing the nut 24 onto the tip portion 22a of the bolt 22 protruding from the second metal fitting 23 and tightening it. At this time, as described above, the clamp 2 is not in contact with the outer surface A1 of the post A, but only the elastic body 4 is in contact, so that damage to the paint applied to the outer surface A1 can be effectively prevented. can. As shown in FIG. 7, when the exterior wall material D is installed around the column A, the clamp 2 may be tightened with the first metal fitting 21 directed toward the exterior wall material D side. By arranging the first metal fitting 21 in such a manner, after the exterior wall material D is installed, the main rope locking metal fitting 1 can be easily removed by loosening the nut 24 from the indoor side. As described above, since the first metal fitting 21 is L-shaped in plan view, the main rope locking metal fitting 1 can be used at the corners of the outer wall material D, and the convenience can be improved.

支柱Ａに親綱係止金具１を設置した後、図４から図６に示すように、親綱ＢのロープＢ１両端に取付けられたフックＢ２を各親綱係止金具１の係止環３に係止させて親綱Ｂを張る。そして、作業員は自身が装着する墜転落防止器具のランヤード（図示せず）をロープＢ１に引掛けて施工を行う。万が一作業員が高所から転落した場合は、ロープＢ１のランヤードを掛けた支持点に下方向への負荷がかかり、親綱係止金具１に衝撃荷重が伝搬される。このとき、フックＢ２を係止する係止環３には斜め下方向への強い負荷がかかり、親綱係止金具１を下方へ引張る力が働くが、係止環３の基端部３ｂが下方へ折れ曲がることにより負荷を吸収してクランプ２に伝搬する衝撃荷重を軽減する。また軽減された衝撃荷重はクランプ２に伝搬されるが、弾性体４の摩擦力によって吸収されるため、親綱係止金具１が下方へ滑り落ちることを防止することができる。 After installing the main rope locking metal fittings 1 on the post A, as shown in FIGS. , and tighten the master rope B. Then, the worker performs construction by hooking a lanyard (not shown) of a fall prevention device that he or she wears on the rope B1. In the unlikely event that the worker falls from a high place, a downward load is applied to the support point of the rope B1 where the lanyard is hung, and the impact load is transmitted to the main rope locking fitting 1. At this time, a strong downward load is applied to the locking ring 3 that locks the hook B2, and a force acts to pull the main rope locking fitting 1 downward. By bending downward, the load is absorbed and the impact load transmitted to the clamp 2 is reduced. Also, the reduced impact load is transmitted to the clamp 2, but is absorbed by the frictional force of the elastic body 4, so that the main rope locking fitting 1 can be prevented from sliding down.

上記構成の親綱係止金具１の安全性能を確認するために、図８に示す落下体Ｅと、墜転落防止器具のロープ式ランヤードＦと、を用意して垂直落下性能試験を行った。本垂直落下性能試験は、一般社団法人仮設工業会の認定基準に基づく「落下阻止性能試験」を拡大解釈して行ったものである。すなわち、「落下阻止性能試験」が１０ｍ間隔で立設する一対の支柱間に親綱を張り、質量１００±１ｋｇの重錘を取り付けた試験用ロープを親綱のロープ中点に係止させ、所定高さから重錘を落下させるに対し、垂直落下性能試験は、１本の支柱Ａに親綱係止金具１を設置し、質量５０ｋｇの落下体Ｅをショックアブソーバ付きのロープ式ランヤードＦの一端部に取り付け、ロープ式ランヤードＦの他端部を親綱係止金具１の係止環３に係止させた状態で所定高さから落下体Ｅを落下させる方法で実施した。そして、ロープ式ランヤードＦの伸びを計測した後、落下体Ｅ及び親綱係止金具１の外観を観察した。 In order to confirm the safety performance of the main rope locking metal fitting 1 configured as described above, a vertical drop performance test was conducted by preparing a falling object E shown in FIG. 8 and a rope-type lanyard F of a fall prevention device. This vertical drop performance test is an expanded interpretation of the "fall prevention performance test" based on the certification standards of the Temporary Construction Industry Association. That is, in the "fall prevention performance test", a master rope is stretched between a pair of supports set up at intervals of 10 m, and a test rope with a weight of 100 ± 1 kg is attached to the rope midpoint of the master rope, In the vertical drop performance test, a main rope locking metal fitting 1 is installed on one post A, and a falling body E weighing 50 kg is placed on a rope-type lanyard F with a shock absorber. Attached to one end of the rope type lanyard F, the other end of the rope type lanyard F is locked to the locking ring 3 of the master rope locking metal fitting 1, and the falling object E is dropped from a predetermined height. After measuring the elongation of the rope type lanyard F, the appearance of the fallen body E and the main rope locking fitting 1 was observed.

垂直落下性能試験後、ロープ式ランヤードＦのショックアブソーバが約２００ｍｍ伸びたものの、ロープ式ランヤードＦの外観に亀裂や切断などの異常は認められず、また落下体Ｅがロープ式ランヤードＦから外れることもなかった。一方、親綱係止金具１については、クランプ２及び弾性体４の滑動は確認されず、係止環３の基端部３ｂが下方へ折れ曲がる塑性変形が認められた。この試験結果から、親綱係止金具１は、下方へ引張る衝撃荷重が作用しても、係止環３が塑性変形して衝撃荷重を吸収することにより、金具自体の滑落を阻止する一定の性能を有することが確認された。 After the vertical drop performance test, the shock absorber of the rope lanyard F stretched by about 200 mm, but no cracks, cuts, or other abnormalities were observed in the external appearance of the rope lanyard F, and the falling object E came off the rope lanyard F. There was no On the other hand, regarding the master rope locking metal fitting 1, no sliding of the clamp 2 and the elastic body 4 was confirmed, and plastic deformation in which the base end portion 3b of the locking ring 3 was bent downward was recognized. From this test result, even if a downward pulling impact load acts on the main rope locking metal fitting 1, the locking ring 3 plastically deforms to absorb the impact load, thereby preventing the metal fitting itself from sliding down. performance was confirmed.

このように、本願の親綱係止金具１は、下方向への衝撃荷重が作用した際に、あえて係止環３を塑性変形させることにより衝撃荷重を吸収し、金具自体の滑落を効果的に防止することができる。また、親綱係止金具１を支柱Ａに設置した際、支柱Ａの外側面Ａ１には弾性体４のみが当接するので、施工中に支柱Ａの外側面Ａ１を傷つける虞がなく、親綱係止金具１を取り外した後に塗膜の補修を行う必要がない。そして、親綱係止金具１はボルト２２を締付けるだけで支柱Ａに設置可能であるため、迅速、且つ、確実に親綱を設置することができる。 In this way, when a downward impact load is applied to the main rope locking fitting 1 of the present application, the locking ring 3 is intentionally plastically deformed to absorb the impact load, effectively preventing the metal fitting itself from slipping down. can be prevented. Also, when the main rope locking fitting 1 is installed on the support A, only the elastic body 4 abuts against the outer surface A1 of the support A, so there is no risk of damaging the outer surface A1 of the support A during construction. There is no need to repair the coating film after removing the locking metal fitting 1. - 特許庁Further, since the main rope locking fitting 1 can be installed on the post A only by tightening the bolt 22, the main rope can be installed quickly and reliably.

本発明の実施の形態は上述の形態に限ることなく、本発明の思想の範囲を逸脱しない範囲で適宜変更することができる。 The embodiments of the present invention are not limited to those described above, and can be modified as appropriate without departing from the spirit of the present invention.

本発明に係る親綱係止金具１は、管径の細い角形鋼管からなる支柱に親綱を固定する場合に好適に使用することができる。 The main rope locking fitting 1 according to the present invention can be suitably used when fixing a main rope to a post made of a rectangular steel pipe with a small pipe diameter.

１ 親綱係止金具
２ クランプ
２１ 第１金具
２１ａ 第１金具の水平方向の一端部
２１ｂ 第１金具の水平方向の他端部
２５ 第１金具の２金具に相対向する部分
２２ ボルト
２２ａ ボルトの先端部
２３ 第２金具
２３ａ 第２金具の側面（クランプの側面）
２４ ナット
３ 係止環
３ａ 孔
３１ 底板
４ 弾性体
Ａ 支柱
Ａ１ 支柱の外側面
Ａ２ 支柱の角部
Ｂ 親綱 1 master rope locking metal fitting 2 clamp 21 first metal fitting 21a one end of the first metal fitting in the horizontal direction 21b the other end of the first metal fitting in the horizontal direction 25 the portion of the first metal fitting facing the two metal fittings 22 bolt 22a of the bolt Tip 23 Second metal fitting 23a Side of second metal fitting (side of clamp)
24 nut 3 locking ring 3a hole 31 bottom plate 4 elastic body A strut A1 outer surface of strut A2 corner of strut B main rope

Claims (4)

鋼管からなる支柱に、親綱を係止させるための親綱係止金具であって、
前記支柱の外側面に配置され、前記支柱を挟み込むクランプと、
前記クランプの側面に固定されるとともに前記支柱と反対の方向へ突出し、前記親綱を係止させる係止環と、
前記クランプに固定され、当該クランプと前記支柱の外側面との間を閉塞する弾性体と、を備えることを特徴とする親綱係止金具。 A master rope locking fitting for locking a master rope to a post made of a steel pipe,
a clamp disposed on the outer surface of the support and sandwiching the support;
a locking ring fixed to the side surface of the clamp and protruding in a direction opposite to the strut for locking the master rope;
An elastic body fixed to the clamp and closing a gap between the clamp and the outer surface of the strut. 前記係止環は、水平方向へ延びる金板に、板厚方向へ貫通する孔を形成してなることを特徴とする請求項１に記載の親綱係止金具。 2. The main rope locking fitting according to claim 1, wherein said locking ring is formed by forming a hole penetrating in the plate thickness direction in a metal plate extending in the horizontal direction. 前記支柱は、角形鋼管であり、
前記クランプは、前記支柱の角部に配置されるＬ字形状の第１金具と、当該第１金具の水平方向の一端部に水平方向へ回動自在に固定されるボルトと、前記第１金具の水平方向の他端部に水平方向へ回動自在に固定され、前記ボルトの先端部に挿通される第２金具と、前記第２金具から突出した前記ボルトに螺着するナットと、を有し、
前記係止環は、前記第２金具の側面に固定されることを特徴とする請求項１又は請求項２に記載の親綱係止金具。 The strut is a square steel pipe,
The clamp includes an L-shaped first metal fitting arranged at a corner of the support column, a bolt fixed to one end of the first metal fitting in the horizontal direction so as to be rotatable in the horizontal direction, and the first metal fitting. a second metal fitting that is horizontally rotatably fixed to the other end in the horizontal direction of the second metal fitting and that is inserted through the tip of the bolt; and a nut that is projected from the second metal fitting and screwed onto the bolt death,
3. The master rope locking metal fitting according to claim 1, wherein the locking ring is fixed to a side surface of the second metal fitting. 前記弾性体は、少なくとも前記第２金具と、前記第１金具の前記２金具に相対向する部分とに固定されることを特徴とする請求項３に記載の親綱係止金具。 4. The main rope locking metal fitting according to claim 3, wherein the elastic body is fixed to at least the second metal fitting and a portion of the first metal fitting facing the two metal fittings.
JP2021069054A 2021-04-15 2021-04-15 Main rope locking metal fitting Pending JP2022163918A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7337467B1 (en) 2022-11-22 2023-09-04 日鉄物流株式会社 Fall prevention aid
KR102633365B1 (en) * 2023-04-24 2024-02-05 화일산기(주) Safety rope clamp for scaffolding

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Publication number Priority date Publication date Assignee Title
JPS59160747U (en) * 1983-04-13 1984-10-27 ナショナル住宅産業株式会社 Lifeline attachment device
JPH08158663A (en) * 1994-11-30 1996-06-18 Kunimoto Shokai:Kk Safety master rope fitting device
JP3045613U (en) * 1997-07-25 1998-02-13 三和工業株式会社 Metal fittings for parent rope
JP2006083602A (en) * 2004-09-16 2006-03-30 Japan Steels International Inc Parent rope bracket for reinforcement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59160747U (en) * 1983-04-13 1984-10-27 ナショナル住宅産業株式会社 Lifeline attachment device
JPH08158663A (en) * 1994-11-30 1996-06-18 Kunimoto Shokai:Kk Safety master rope fitting device
JP3045613U (en) * 1997-07-25 1998-02-13 三和工業株式会社 Metal fittings for parent rope
JP2006083602A (en) * 2004-09-16 2006-03-30 Japan Steels International Inc Parent rope bracket for reinforcement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7337467B1 (en) 2022-11-22 2023-09-04 日鉄物流株式会社 Fall prevention aid
KR102633365B1 (en) * 2023-04-24 2024-02-05 화일산기(주) Safety rope clamp for scaffolding

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