JP2021029792A

JP2021029792A - Clamp for mounting horizontal main rope

Info

Publication number: JP2021029792A
Application number: JP2019155316A
Authority: JP
Inventors: 中山　太一; Taichi Nakayama; 太一中山; 悟森井; Satoru Morii; 実豊岡; Minoru Toyooka; 信治津山; Shinji Tsuyama
Original assignee: Eagle Clamp Co Ltd
Current assignee: Eagle Clamp Co Ltd
Priority date: 2019-08-28
Filing date: 2019-08-28
Publication date: 2021-03-01

Abstract

To provide a clamp that can respond the use of the full harness type fall prevention equipment and can set a horizontal main rope in any height.SOLUTION: A clamp 10 for mounting a horizontal main rope is provided with a clamping bolt 16 at a leg part 12 of a clamp body 11 having a horizontal main rope lock hole 15 in a reciprocating manner, and is provided with a turning jaw 20 at a leg part 13 opposed to the leg part 12 across an opening 14 through a bearing outer. A tightening confirmation ring is provided so as to be visible under normal circumstances in the tip end outer face of the bearing outer. When the clamping bolt 16 is tightened while the existing H-shaped steel flange is sandwiched between the clamping bolt 16 and the turning jaw 20, the bearing outer is retreated by a predetermined distance against the spring force by a plate spring assembly, and the tightening confirmation ring is buried and cannot be seen. As a result, the confirmation is made that the prescribed tightening force is acted.SELECTED DRAWING: Figure 1

Description

本発明は、建設工事などにおいて高所作業員の墜落を防止するために装着する安全帯のフックを引っ掛けて使用する親綱を任意の高さ位置に水平にピンと張った状態で取り付けるクランプに関する。 The present invention relates to a clamp in which a main rope used by hooking a hook of a safety belt to be attached to prevent aerial workers from falling in construction work or the like is attached at an arbitrary height position in a horizontally taut state.

建設工事などにおいて高所作業を行う場合は、作業床を設置し、作業床の周囲や開口部の回りに囲いや手摺を設置して作業員の墜落を防止することが原則であるが、このような対応が困難な場合は、作業員に安全帯を装着させ、この安全帯に連結したランヤードの先端のフックを、親綱支柱間に水平に張った親綱に引っ掛けた状態で作業を行うことが事業者に義務付けられている（特許文献１）。 When working at heights in construction work, etc., it is a general rule to install a work floor and install enclosures and handrails around the work floor and around openings to prevent workers from falling. If such a response is difficult, have the worker wear a safety belt, and work with the hook at the tip of the lanyard connected to this safety belt hooked on the main rope stretched horizontally between the main rope columns. Is obligatory for the business operator (Patent Document 1).

実用新案登録第３１９５０４４号公報（図２）Utility Model Registration No. 3195044 (Fig. 2)

平成３０年６月８日に労働安全衛生法施行令が改正され、同施行令に規定される「安全帯」が「墜落制止用器具」と改められると共に、同年同月１９日に労働安全衛生規則等における墜落・転落による労働災害を防止するための措置等についても所要の改正が行われ、平成３１年２月１日から施行されている。 The Industrial Safety and Health Law Enforcement Ordinance was amended on June 8, 2018, and the "safety belt" stipulated in the enforcement ordinance was changed to "fall prevention equipment", and on the same month 19th of the same year, the Occupational Safety and Health Regulations. Necessary amendments have also been made to measures to prevent occupational accidents caused by falls, etc., which have been in force since February 1, 2019.

これによると、墜落制止用器具としては、従来汎用されてきた胴ベルト型のもの（特許文献１の安全帯１２）に代えて、フルハーネス型を用いることが原則とされたため、これを取り付ける水平親綱の位置も、胴ベルト型の場合の腰の高さから肩の高さにまで高くして張る必要がある。しかしながら、従来の親綱支柱は、胴ベルト型の使用を前提としているため、腰の高さ程度にしか水平親綱の高さ位置を確保することができなかった。また、親綱支柱を用いた場合、水平親綱の端部を係止する係止部（特許文献１の掛止突起１８）によって水平親綱の高さが固定されるため、作業者の身長や作業内容などに応じて水平親綱の高さを自在に調整することが困難であった。 According to this, as a fall prevention device, in principle, a full harness type is used instead of the body belt type (safety belt 12 of Patent Document 1) which has been widely used in the past. The position of the main rope also needs to be raised from the waist height to the shoulder height in the case of the body belt type. However, since the conventional main rope support is premised on the use of a body belt type, the height position of the horizontal main rope can be secured only at the height of the waist. Further, when the main rope support is used, the height of the horizontal main rope is fixed by the locking portion (hanging protrusion 18 of Patent Document 1) that locks the end portion of the horizontal main rope, so that the height of the worker is increased. It was difficult to freely adjust the height of the horizontal master rope according to the work contents.

したがって、本発明が解決しようとする課題は、フルハーネス型墜落制止用器具の使用に対応すると共に、任意の高さに水平親綱を張るために好適なクランプを提供することである。 Therefore, the problem to be solved by the present invention is to cope with the use of a full harness type fall prevention device and to provide a clamp suitable for stretching a horizontal main rope at an arbitrary height.

この目的を達成するため、本願の請求項１に係る発明は、第一の脚部と第二の脚部との間に開口部を有して概してコ字形に形成されたクランプ本体と、クランプ本体の開口部とは反対側に形成された水平親綱係止穴と、第一の脚部を貫通する雌ネジに螺着されて軸方向に進退可能に設けられる締付ボルトと、締付ボルトに対向して第二の脚部に装着される受け金と、締付ボルトと受け金の間に垂直構造物の突出片を挟んだ状態で締付ボルトを回転させて締め付けたときに規定の締付力が働いたことを確認する締付確認手段と、を有してなることを特徴とする、水平親綱取付用クランプ。

In order to achieve this object, the invention according to claim 1 of the present application is a clamp body having an opening between the first leg and the second leg and generally formed in a U shape, and a clamp. Tightening with a horizontal master rope locking hole formed on the opposite side of the opening of the main body, and a tightening bolt that is screwed into a female screw penetrating the first leg and is provided so that it can move forward and backward in the axial direction. Specified when the tightening bolt is rotated and tightened with the receiving piece attached to the second leg facing the bolt and the protruding piece of the vertical structure sandwiched between the tightening bolt and the receiving piece. A clamp for attaching a horizontal master screw, which is characterized by having a tightening confirmation means for confirming that the tightening force of the bolt has been applied.

本願の請求項２に係る発明は、請求項１記載の水平親綱取付用クランプにおいて、第二の脚部に形成した装着穴に軸方向に相対移動可能に装着されると共に受け金の基端部を収容する移動部材と、常態において移動部材の先端部を第二の脚部の内側開口端から突出させるべく付勢する付勢手段とを有し、前記締付確認手段が、移動部材の該突出先端部の外面に常態において目視可能に設けられ、前記垂直構造物の突出片を締付ボルトと受け金の間に挟んだ状態で締付ボルトを締め付けたときに、移動部材が付勢手段による付勢力に抗して所定距離後退し、締付確認手段が第二の脚部内に埋没して目視不能になることにより規定の締付力が働いたことを確認することを特徴とする。
The invention according to claim 2 of the present application is the horizontal master rope mounting clamp according to claim 1, which is mounted in a mounting hole formed in a second leg so as to be relatively movable in the axial direction and at the base end of a receiver. It has a moving member for accommodating the portion and an urging means for urging the tip portion of the moving member to protrude from the inner opening end of the second leg portion in a normal state, and the tightening confirmation means is the moving member. The moving member is urged when the tightening bolt is tightened while the protruding piece of the vertical structure is sandwiched between the tightening bolt and the receiver, which is visibly provided on the outer surface of the protruding tip portion in a normal state. It is characterized by retreating a predetermined distance against the urging force by the means and confirming that the specified tightening force has been applied by burying the tightening confirmation means in the second leg and making it invisible. ..

本願の請求項３に係る発明は、請求項２記載の水平親綱取付用クランプにおいて、前記締付確認手段が、前記移動部材の前記突出先端部の外面に形成される締付確認ライン、または、該外面に刻設される周回溝に嵌着されるリング部材からなることを特徴とする。 In the invention according to claim 3 of the present application, in the horizontal master rope mounting clamp according to claim 2, the tightening confirmation means is formed on the outer surface of the protruding tip portion of the moving member, or a tightening confirmation line. It is characterized in that it is composed of a ring member fitted in a circumferential groove formed on the outer surface.

本願の請求項４に係る発明は、請求項２または請求項３記載の水平親綱取付用クランプにおいて、前記付勢手段が、前記装着穴の内面と前記移動部材の後端部との間に複数枚を重ね合わせた状態で装着された皿バネ集合体からなることを特徴とする。 In the invention according to claim 4 of the present application, in the horizontal master rope mounting clamp according to claim 2 or 3, the urging means is provided between the inner surface of the mounting hole and the rear end portion of the moving member. It is characterized by being composed of a disc spring assembly mounted in a state where a plurality of sheets are stacked.

本願の請求項５に係る発明は、請求項２ないし４のいずれか記載の水平親綱取付用クランプにおいて、前記移動部材が、受け金収容凹部を有する前方大径部と、前方大径部より小径に形成される後方小径部とを有し、前記付勢手段が移動部材の後方小径部を取り巻くように設けられることを特徴とする。 In the invention according to claim 5 of the present application, in the clamp for attaching a horizontal master rope according to any one of claims 2 to 4, the moving member is formed from a front large-diameter portion having a receiving recess and a front large-diameter portion. It has a rear small diameter portion formed with a small diameter, and the urging means is provided so as to surround the rear small diameter portion of the moving member.

本願の請求項６に係る発明は、請求項２ないし５のいずれか記載の水平親綱取付用クランプにおいて、前記移動部材の前方大径部と後方小径部の間に周回溝が形成されると共に、第二の脚部の装着穴に突出して周回溝内に挿入される係止部材が設けられ、係止部材が周回溝の溝幅内に軸方向に移動可能に設けられることにより、移動部材が第二の脚部の装着穴に対して軸方向に相対移動可能とされることを特徴とする。 In the invention according to claim 6 of the present application, in the horizontal master rope mounting clamp according to any one of claims 2 to 5, a circumferential groove is formed between the front large diameter portion and the rear small diameter portion of the moving member. , A locking member that protrudes into the mounting hole of the second leg and is inserted into the circumferential groove is provided, and the locking member is provided so as to be movable in the axial direction within the groove width of the circumferential groove. Is characterized in that it can be moved relative to the mounting hole of the second leg in the axial direction.

本発明によれば、重量物の吊上げ・運搬に汎用されている吊りクランプを簡単な加工（水平親綱取付穴の形成など）で水平親綱取付用に転用することができ、且つ、水平親綱をピンと張った状態で取り付けることができる。本発明の水平親綱取付用クランプは、工事現場に既設されている垂直構造物（Ｈ型鋼などの鉄骨）を利用して、その突出片（Ｈ型鋼のフランジなど）に取り付けて使用することができるので、任意の高さに水平親綱を張設することができる。 According to the present invention, a suspension clamp that is widely used for lifting and transporting heavy objects can be diverted for horizontal master rope mounting by simple processing (formation of horizontal master rope mounting holes, etc.), and is also a horizontal master. It can be attached with the rope taut. The horizontal master rope mounting clamp of the present invention can be used by using a vertical structure (steel frame such as H-shaped steel) already installed at a construction site and attaching it to a protruding piece (flange of H-shaped steel or the like). Therefore, the horizontal master rope can be stretched at any height.

本発明の好適な一実施形態によれば、第二の脚部に対して軸方向に移動可能に装着される移動部材が、前方大径部と後方小径部とを有するものとして形成され、常態において移動部材の先端部を第二の脚部の内側開口端から突出させるべく付勢する付勢手段（皿バネ集合体など）が、移動部材の後方小径部を取り巻くように設けられる。これにより、移動部材や付勢手段を小型化ないし小径化することができ、クランプ全体を軽量コンパクトなものにする効果がある。 According to a preferred embodiment of the present invention, the moving member movably mounted in the axial direction with respect to the second leg is formed as having a front large diameter portion and a rear small diameter portion, and is in a normal state. A urging means (such as a disc spring assembly) for urging the tip of the moving member to protrude from the inner opening end of the second leg is provided so as to surround the rear small diameter portion of the moving member. As a result, the moving member and the urging means can be made smaller or smaller in diameter, which has the effect of making the entire clamp lightweight and compact.

本発明による水平親綱取付用クランプの一実施形態を示す正面図である。It is a front view which shows one Embodiment of the clamp for attaching a horizontal master rope by this invention. この水平親綱取付用クランプの側面図である。It is a side view of the clamp for attaching a horizontal master rope. この水平親綱取付用クランプにおける締付確認手段に関連する要部を拡大して示す断面図であり、（ａ）は締付力が働かないとき、（ｂ）は締付力が働いて皿バネ集合体が収縮したときの各状態を示す。It is a cross-sectional view which shows the main part related to the tightening confirmation means in this horizontal master rope attachment clamp enlarged, (a) is when the tightening force does not work, (b) is the dish by the tightening force working. Each state when the spring assembly contracts is shown. この水平親綱取付用クランプに用いられるベアリングアウター（移動部材）を単独で示す斜視図であり、（ａ）は締付確認リングを装着しない状態、（ｂ）は締付確認リングを装着した状態を示す。It is a perspective view which shows the bearing outer (moving member) used for this horizontal master rope mounting clamp independently, (a) is a state which a tightening confirmation ring is not attached, (b) is a state that a tightening confirmation ring is attached. Is shown. この水平親綱取付用クランプの用例を示す斜視図である。It is a perspective view which shows the example of the clamp for attaching a horizontal master rope.

図１は本発明による水平親綱取付用クランプ１０の一実施形態を示す。 FIG. 1 shows an embodiment of a clamp 10 for attaching a horizontal master rope according to the present invention.

略Ｕ字形のクランプ本体１１は脚部１２，１３を有し、これら脚部の間に、工事現場において既に設置されている垂直構造物の突出片（たとえば、鉄骨として既設されたＨ型鋼のフランジ１，図４参照）を挿入するための開口部１４が形成されている。開口部１４の反対側において、クランプ本体１１には水平親綱取付穴１５が貫通形成されている。 The substantially U-shaped clamp body 11 has legs 12 and 13, and between these legs, a protruding piece of a vertical structure already installed at a construction site (for example, a flange of an H-shaped steel already installed as a steel frame). 1, An opening 14 for inserting (see FIG. 4) is formed. On the opposite side of the opening 14, a horizontal master rope mounting hole 15 is formed through the clamp body 11.

脚部１２には、締付ボルト１６が進退自在に取り付けられている。締付ボルト１６は、脚部１２を貫通して形成された雌ネジ（符号なし）と螺合する雄ネジ（符号なし）が外面に形成されている。締付ボルト１６の開口部１４に臨む先端には、係合歯（符号なし）が形成されたパッド１７が相対回転自在且つ着脱可能に取り付けられている。また、締付ボルト１６の後端には、回転操作用のハンドル（図示せず）を取り付けるためのハンドル取付穴１８が貫通している。 A tightening bolt 16 is attached to the leg portion 12 so as to be able to advance and retreat. The tightening bolt 16 has a female screw (unsigned) formed through the leg portion 12 and a male screw (unsigned) formed on the outer surface thereof. A pad 17 having engaging teeth (unsigned) is attached to the tip of the tightening bolt 16 facing the opening 14 so as to be relatively rotatable and detachable. Further, a handle mounting hole 18 for mounting a handle for rotation operation (not shown) penetrates through the rear end of the tightening bolt 16.

脚部１３には、ベアリングアウター１９を介して、開口部１４に臨む先端に係合歯２０ａ（図３）が形成された旋回顎２０が取り付けられている。この構成の詳細について図３および図４を併せて参照して説明すると、脚部１３には開口部１４に開口する装着穴（符号なし）が、開口部１４に向けた前方では大径に、底部では小径に形成されており、ベアリングアウター１９は、装着穴の大径部分と略同一の外径を有する前方大径部１９ａと、装着穴の底部小径部分よりさらに小さい外径を有する後方小径部１９ｂとを有する。 A swivel jaw 20 having engaging teeth 20a (FIG. 3) formed at a tip facing the opening 14 is attached to the leg portion 13 via a bearing outer 19. Explaining the details of this configuration with reference to FIGS. 3 and 4, the leg portion 13 has a mounting hole (unsigned) that opens into the opening 14 and has a large diameter in front of the opening 14. The bearing outer 19 is formed to have a small diameter at the bottom, and the bearing outer 19 has a front large diameter portion 19a having substantially the same outer diameter as the large diameter portion of the mounting hole, and a rear small diameter portion having an outer diameter smaller than the bottom small diameter portion of the mounting hole. It has a part 19b.

ベアリングアウター大径部１９ａの底面には座金２１が添着され、装着穴の底面２２近くの所定箇所には座金２３が設けられており、これら座金２１，２３間に、装着穴の底部小径部分とベアリングアウター１９の後方小径部１９ｂとの間の空間を利用して、皿バネ集合体２４が配置されている。図３（ａ）では皿バネ集合体２４が圧縮されておらず、その押しバネ力によってベアリングアウター１９の先端部が脚部１３の内面１３ａから開口部１４に向けて比較的大きく突出した状態にあり、図３（ｂ）では皿バネ集合体２４が圧縮されているため、ベアリングアウター先端部の突出量が小さくなっている。この実施例では、皿バネを２枚密接させたものを一対として４対（計８枚）用い、各対を互い違いに重ね合わせて所要の締付力（たとえば１９６０Ｎ／ｃｍ（２００ｋｇｆ／ｃｍ）以上）を与えることができるように設計されている。 A washer 21 is attached to the bottom surface of the bearing outer large diameter portion 19a, and a washer 23 is provided at a predetermined position near the bottom surface 22 of the mounting hole. The disc spring assembly 24 is arranged by utilizing the space between the bearing outer 19 and the rear small diameter portion 19b. In FIG. 3A, the disc spring assembly 24 is not compressed, and the tip of the bearing outer 19 protrudes relatively large from the inner surface 13a of the leg 13 toward the opening 14 due to the pushing spring force. Yes, in FIG. 3B, since the disc spring assembly 24 is compressed, the amount of protrusion of the tip of the bearing outer is small. In this embodiment, four pairs (8 in total) of two disc springs in close contact with each other are used, and the pairs are alternately overlapped to obtain a required tightening force (for example, 1960 N / cm (200 kgf / cm) or more). ) Is designed to be given.

ベアリングアウター大径部１９ａの底面近くには周回溝２５が形成されており、この周回溝２５に、脚部１３の側面から挿入した六角穴付止めネジ２６が挿入されている。六角穴付止めネジ２６の径（図３において上下方向に現れる長さ寸法）は周回溝２５の溝幅より短いので、この寸法差分だけベアリングアウター１９は脚部１３に対して進退可能である。皿バネ集合体２４が圧縮されていないためベアリングアウター先端部の突出量が大きい状態（図３（ａ））では、六角穴付止めネジ２６が周回溝２６の後方に位置しており、皿バネ集合体２４が圧縮されてベアリングアウター先端部の突出量が小さい状態（図３（ｂ））では、六角穴付止めネジ２６が周回溝２６の前方に位置している。 A circumferential groove 25 is formed near the bottom surface of the bearing outer large diameter portion 19a, and a hexagon socket set screw 26 inserted from the side surface of the leg portion 13 is inserted into the circumferential groove 25. Since the diameter of the hexagon socket set screw 26 (the length dimension that appears in the vertical direction in FIG. 3) is shorter than the groove width of the circumferential groove 25, the bearing outer 19 can move forward and backward with respect to the leg portion 13 by this dimensional difference. In a state where the protrusion amount of the tip of the bearing outer is large because the disc spring assembly 24 is not compressed (FIG. 3A), the hexagon socket set screw 26 is located behind the circumferential groove 26, and the disc spring In a state where the assembly 24 is compressed and the amount of protrusion of the tip of the bearing outer is small (FIG. 3B), the hexagon socket set screw 26 is located in front of the circumferential groove 26.

ベアリングアウター１９の先端部の外面にはリング嵌着溝３０が環設され、この周回溝３０に、締付確認手段として働く締付確認リング２７が嵌着されている。締付確認リング２７は、たとえば赤色などの目立つ色で着色されることが好ましい。あるいは、これに代えて、該所定位置に目立つ色に着色した締付確認ラインを周回させて形成しても良い。 A ring fitting groove 30 is ringed on the outer surface of the tip of the bearing outer 19, and a tightening confirmation ring 27 that acts as a tightening confirmation means is fitted in the circumferential groove 30. The tightening confirmation ring 27 is preferably colored with a prominent color such as red. Alternatively, instead of this, a tightening confirmation line colored in a conspicuous color may be formed around the predetermined position.

ベアリングアウター大径部１９ａの先端中央部には球形の旋回顎収容凹部３２が形成され、この旋回顎収容凹部３２に、旋回顎２０の球状基部２０ｂが篏合されて、ストッパーリング２８によって抜け止めされている。これにより、旋回顎２０は、ベアリングアウター１９と共に脚部１３に対して進退可能であり、且つ、ベアリングアウター１９に対して揺動自在である。また、旋回顎２０と脚部１３の内面１３ａとの間にはコイルスプリング２９（図１，図２）が装着されている。コイルスプリング２９は、このクランプ１０をＨ型鋼フランジ１に固定する際に、旋回顎２０が倒れた状態になることを防ぐ作用を果たす。図４において符号３１はＯリング（符号なし）を嵌着するリング嵌着溝であり、これにより皿バネ集合体２４の脱落を防止している。 A spherical swivel jaw accommodating recess 32 is formed in the central portion of the tip of the bearing outer large diameter portion 19a, and a spherical base 20b of the swivel jaw 20 is fitted into the swivel jaw accommodating recess 32 to prevent it from coming off by a stopper ring 28. Has been done. As a result, the swivel jaw 20 can move forward and backward with respect to the leg portion 13 together with the bearing outer 19, and can swing freely with respect to the bearing outer 19. Further, a coil spring 29 (FIGS. 1 and 2) is mounted between the swivel jaw 20 and the inner surface 13a of the leg portion 13. The coil spring 29 serves to prevent the swivel jaw 20 from falling when the clamp 10 is fixed to the H-shaped steel flange 1. In FIG. 4, reference numeral 31 is a ring fitting groove for fitting an O-ring (without reference numeral), thereby preventing the disc spring assembly 24 from falling off.

以上のように構成された親綱取付用クランプ１０の作用および用法について、さらに図５を参照して説明する。このクランプ１０の開口部１４にＨ型鋼フランジ１を挿入し、ハンドル取付穴１８に取り付けたハンドル（図示せず）を回して締付ボルト１６を開口部１４に向けて突出させる方向に移動させ、パッド１７と旋回顎２０との間でＨ型鋼フランジ１を圧接挟持する。さらに締付ボルト６を締め付けていくと、ベアリングアウター２０が皿バネ集合体２４のバネ力に抗して脚部１３の内部に埋没する方向に後退移動し、それまでは脚部内面１３ａから突出していて作業員が目視可能であった締付確認ライン２７が脚部１３内に埋没して見えなくなり、これをもって規定の締付トルクが働いたことを確認することができる。 The operation and usage of the master rope mounting clamp 10 configured as described above will be further described with reference to FIG. The H-shaped steel flange 1 is inserted into the opening 14 of the clamp 10, and the handle (not shown) attached to the handle mounting hole 18 is turned to move the tightening bolt 16 in the direction of projecting toward the opening 14. The H-shaped steel flange 1 is pressure-welded and sandwiched between the pad 17 and the swivel jaw 20. When the tightening bolt 6 is further tightened, the bearing outer 20 moves backward in the direction of being buried inside the leg 13 against the spring force of the disc spring assembly 24, and until then, protrudes from the inner surface 13a of the leg. The tightening confirmation line 27, which was visible to the operator, was buried in the leg 13 and disappeared, so that it was possible to confirm that the specified tightening torque was applied.

このクランプ取付作業を、対向する２箇所のＨ型鋼フランジ１に対して行った後、２つのクランプ１０，１０の水平親綱取付穴１５，１５に水平親綱２の両端をフック３などを介して取り付ける。クランプ１０をＨ型鋼フランジ１に取り付ける高さ位置は限定されないので、作業員が装着する墜落制止用器具の種類（胴ベルト型か、フルハーネス型か）や、作業員の身長、作業内容などに応じて任意の高さで水平親綱２を張ることができる。図５には、フルハーネス型の墜落制止用器具４を装着した作業員５が高所作業をする際の用例が示されており、作業員５の肩の高さに張った水平親綱２に、作業員５が装着するフルハーネス型墜落制止用器具４にランヤード６を介して連結したフック７を引っ掛けている。 After performing this clamp mounting work on two H-shaped steel flanges 1 facing each other, both ends of the horizontal master rope 2 are connected to the horizontal master rope mounting holes 15 and 15 of the two clamps 10 and 10 via hooks 3 and the like. To install. Since the height position at which the clamp 10 is attached to the H-shaped steel flange 1 is not limited, it depends on the type of fall prevention device (body belt type or full harness type) worn by the worker, the height of the worker, the work content, etc. The horizontal master rope 2 can be stretched at any height accordingly. FIG. 5 shows an example of a worker 5 wearing a full harness type fall prevention device 4 working at a high place, and a horizontal master rope 2 stretched at the shoulder height of the worker 5. The hook 7 connected to the full harness type fall prevention device 4 worn by the worker 5 via the lanyard 6 is hooked.

本発明は既述の実施形態に限定されるものではなく、特許請求の範囲に記載される発明の範囲内において様々な実施形態を取ることができる。 The present invention is not limited to the embodiments described above, and various embodiments can be taken within the scope of the invention described in the claims.

１Ｈ型鋼のフランジ
２水平親綱
３フック
４墜落制止用器具（フルハーネス型）
５作業員
６ランヤード
７フック
１０水平親綱取付用クランプ
１１クランプ本体
１２脚部（第一の脚部）
１３脚部（第二の脚部）
１３ａ内面
１４開口部
１５水平親綱取付穴
１６締付ボルト
１７パッド
１８ハンドル取付穴
１９ベアリングアウター（移動部材）
１９ａ大径部
１９ｂ小径部
２０旋回顎（受け金）
２０ａ係合歯
２０ｂ球状基部
２１座金
２２装着穴の底面
２３座金
２４皿バネ集合体（付勢手段）
２５周回溝
２６六角穴付止めネジ（係止部材）
２７締付確認リング（締付確認手段）
２８ストッパーリング
２９コイルスプリング
３０リング嵌着溝
３１リング嵌着溝
３２旋回顎収容凹部（受け金収容凹部） 1 H-shaped steel flange 2 Horizontal master rope 3 Hook 4 Fall prevention device (full harness type)
5 Worker 6 Lanyard 7 Hook 10 Horizontal master rope mounting clamp 11 Clamp body 12 Legs (first leg)
13 Legs (second leg)
13a Inner surface 14 Opening 15 Horizontal master rope mounting hole 16 Tightening bolt 17 Pad 18 Handle mounting hole 19 Bearing outer (moving member)
19a Large diameter part 19b Small diameter part 20 Swing jaw (receiver)
20a Engagement tooth 20b Spherical base 21 Washer 22 Bottom surface of mounting hole 23 Washer 24 Belleville spring assembly (biasing means)
25 Circular groove 26 Hexagon socket set screw (locking member)
27 Tightening confirmation ring (tightening confirmation means)
28 Stopper ring 29 Coil spring 30 Ring fitting groove 31 Ring fitting groove 32 Swing jaw accommodating recess (receiver accommodating recess)

Claims

第一の脚部と第二の脚部との間に開口部を有して概してコ字形に形成されたクランプ本体と、クランプ本体の開口部とは反対側に形成された水平親綱係止穴と、第一の脚部を貫通する雌ネジに螺着されて軸方向に進退可能に設けられる締付ボルトと、締付ボルトに対向して第二の脚部に装着される受け金と、締付ボルトと受け金の間に垂直構造物の突出片を挟んだ状態で締付ボルトを回転させて締め付けたときに規定の締付力が働いたことを確認する締付確認手段と、を有してなることを特徴とする、水平親綱取付用クランプ。 A clamp body having an opening between the first leg and the second leg and generally formed in a U shape, and a horizontal bolt locking formed on the side opposite to the opening of the clamp body. A tightening bolt that is screwed into a hole and a female screw that penetrates the first leg so that it can move forward and backward in the axial direction, and a clamp that faces the tightening bolt and is attached to the second leg. , A tightening confirmation means for confirming that the specified tightening force was applied when the tightening bolt was rotated and tightened with the protruding piece of the vertical structure sandwiched between the tightening bolt and the receiver. A clamp for mounting a horizontal bolt, which is characterized by having.

第二の脚部に形成した装着穴に軸方向に相対移動可能に装着されると共に受け金の基端部を収容する移動部材と、常態において移動部材の先端部を第二の脚部の内側開口端から突出させるべく付勢する付勢手段とを有し、前記締付確認手段が、移動部材の該突出先端部の外面に常態において目視可能に設けられ、前記垂直構造物の突出片を締付ボルトと受け金の間に挟んだ状態で締付ボルトを締め付けたときに、移動部材が付勢手段による付勢力に抗して所定距離後退し、締付確認手段が第二の脚部内に埋没して目視不能になることにより規定の締付力が働いたことを確認することを特徴とする、請求項１記載の水平親綱取付用クランプ。 A moving member that is mounted in a mounting hole formed in the second leg so as to be relatively movable in the axial direction and that accommodates the base end of the receiver, and the tip of the moving member under normal conditions is inside the second leg. It has an urging means for urging to project from the open end, and the tightening confirming means is normally visibly provided on the outer surface of the protruding tip portion of the moving member to display the projecting piece of the vertical structure. When the tightening bolt is tightened while being sandwiched between the tightening bolt and the receiver, the moving member retracts a predetermined distance against the urging force of the urging means, and the tightening confirmation means is inside the second leg. The clamp for attaching a horizontal master rope according to claim 1, wherein it is confirmed that a specified tightening force has been applied by being buried in the clamp and becoming invisible.

前記締付確認手段が、前記移動部材の前記突出先端部の外面に形成される締付確認ライン、または、該外面に刻設される周回溝に嵌着されるリング部材からなることを特徴とする、請求項２記載の水平親綱取付用クランプ。 The tightening confirmation means is characterized by comprising a tightening confirmation line formed on the outer surface of the protruding tip portion of the moving member or a ring member fitted in a circumferential groove engraved on the outer surface. The clamp for attaching the horizontal master rope according to claim 2.

前記付勢手段が、前記装着穴の内面と前記移動部材の後端部との間に複数枚を重ね合わせた状態で装着された皿バネ集合体からなることを特徴とする、請求項２または請求項３記載の水平親綱取付用クランプ。 2. The urging means is characterized by comprising a disc spring assembly mounted in a state in which a plurality of the urging means are overlapped between the inner surface of the mounting hole and the rear end portion of the moving member. The clamp for attaching a horizontal master rope according to claim 3.

前記移動部材が、受け金収容凹部を有する前方大径部と、前方大径部より小径に形成される後方小径部とを有し、前記付勢手段が移動部材の後方小径部を取り巻くように設けられることを特徴とする、請求項２ないし４のいずれか記載の水平親綱取付用クランプ。 The moving member has a front large-diameter portion having a clamp accommodating recess and a rear small-diameter portion formed to have a smaller diameter than the front large-diameter portion, so that the urging means surrounds the rear small-diameter portion of the moving member. The horizontal master rope mounting clamp according to any one of claims 2 to 4, wherein the clamp is provided.

前記移動部材の前方大径部と後方小径部の間に周回溝が形成されると共に、第二の脚部の装着穴に突出して周回溝内に挿入される係止部材が設けられ、係止部材が周回溝の溝幅内に軸方向に移動可能に設けられることにより、移動部材が第二の脚部の装着穴に対して軸方向に相対移動可能とされることを特徴とする、請求項２ないし５のいずれか記載の水平親綱取付用クランプ。 A circumferential groove is formed between the front large-diameter portion and the rear small-diameter portion of the moving member, and a locking member that protrudes into the mounting hole of the second leg and is inserted into the circumferential groove is provided to lock the moving member. The claim is characterized in that the moving member is provided so as to be movable in the axial direction within the groove width of the circumferential groove, so that the moving member can be moved in the axial direction relative to the mounting hole of the second leg portion. Item 2. The clamp for mounting a horizontal master rope according to any one of Items 2 to 5.