JP2009240357A - Fall preventive device - Google Patents
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- JP2009240357A JP2009240357A JP2008087333A JP2008087333A JP2009240357A JP 2009240357 A JP2009240357 A JP 2009240357A JP 2008087333 A JP2008087333 A JP 2008087333A JP 2008087333 A JP2008087333 A JP 2008087333A JP 2009240357 A JP2009240357 A JP 2009240357A
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Abstract
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本発明は、鉄道沿線で高所作業を行なうにあたり、作業者が誤って墜落するのを防止するための手段に関し、具体的には、作業者が装着する安全帯のランヤードを係合させて、作業者を確実に支持することができる装置の提供を目的とする。 The present invention relates to a means for preventing an operator from accidentally falling when performing a high-altitude work along a railway, specifically, by engaging a lanyard of a safety belt worn by an operator, An object of the present invention is to provide an apparatus capable of reliably supporting an operator.
高所作業を行なう作業者の不測の墜落事故を防止するため、安全帯が使用される。安全帯は、使用者の腰に巻かれるベルト又は胴体に装着されるハーネスと、ロープの先にフックを取り付けたランヤードとから成り、作業者の墜落時の衝撃に十分に耐え得る強度を持った取付設備にフックを係合させて用いる。例えば建築物の建設現場では、建設途中の構造物に親綱を張り渡して取付設備とし、この親綱にランヤードのフックを係合させ、安全を確保する（特許文献１）。あるいは屋根上で作業する場合、窓枠に固定した親綱取付具を取付設備とし、この親綱取り付け具に取り付けた親綱に、安全帯のフックを連結して墜落防止を図ることが提案されている（特許文献２）。 Safety belts are used to prevent accidental crashes of workers who work at heights. The safety belt consists of a belt wound around the user's waist or a harness attached to the body, and a lanyard with a hook attached to the end of the rope, and has enough strength to withstand the impact of an operator's crash. The hook is engaged with the mounting equipment. For example, at a construction site of a building, a master rope is stretched over a structure under construction as an attachment facility, and a lanyard hook is engaged with the master rope to ensure safety (Patent Document 1). Alternatively, when working on the roof, it has been proposed to use a master rope fixture fixed to the window frame as an attachment facility, and to connect the master rope attached to this master rope fixture to connect a safety belt hook to prevent falling. (Patent Document 2).
橋梁上での線路保守・点検など、鉄道沿線での作業が高所作業となることがしばしばある。例えば橋梁等の高所では、橋側歩道と欄干等の作業用設備が設けられているならば、この欄干に安全帯のフックを係合させて作業者の墜落防止措置を講じることができる。一方、橋側歩道が線路の片側だけであったり線路の両側とも無設備であったりする個所も存在し、そのような個所では、作業区間に沿ってロープ等を張り渡して親綱とし、これに安全帯を係合させることが行なわれる。但し、必ずしも親綱を張るのが可能とは限らず、無設備区間の範囲が長い個所や適当な固定構造物の無い個所では、親綱を張るのが困難なため、作業者の安全確保が困難になっている。 Work along the railway, such as track maintenance and inspection on bridges, is often a work at high places. For example, in a high place such as a bridge, if work facilities such as a bridge sidewalk and a railing are provided, a safety belt hook can be engaged with the railing to take measures to prevent the operator from falling. On the other hand, there are places where the bridge sidewalk is only on one side of the track, or there are no facilities on both sides of the track, and in such locations, ropes etc. are stretched along the work section as a parent rope. The safety belt is engaged with the belt. However, it is not always possible to stretch the master rope, and it is difficult to stretch the master rope at locations where the area of the non-equipment section is long or where there is no appropriate fixed structure. It has become difficult.
本発明は、前記従来の問題点を解決するため、レールを安全帯の取付設備として利用することを可能にする墜落防止装置を創案したものであって、その特徴とするところは、請求項１に記載する如く、作業者が装着する安全帯のランヤードに備えられるフックを係合させるための装置であって、レールの内外面を挟む一対の脚部とこれら脚部を連結する頂部とを有し、当該頂部にフックを係合させるフック取付部が設けられ、各脚部及び頂部それぞれの内面にレール表面に当接する転動手段が設けられ、前記脚部の少なくとも一方が外側へ揺動可能に構成され、当該脚部の揺動を阻止するストッパーが設けられていることである。 In order to solve the above-mentioned conventional problems, the present invention has devised a crash prevention device that makes it possible to use a rail as a safety belt mounting facility. As described in the above, it is a device for engaging a hook provided on a lanyard of a safety belt worn by an operator, and has a pair of leg portions sandwiching the inner and outer surfaces of the rail and a top portion connecting these leg portions. In addition, a hook attachment portion for engaging the hook with the top portion is provided, and a rolling means for contacting the rail surface is provided on the inner surface of each leg portion and the top portion, and at least one of the leg portions can swing outward. And a stopper for preventing the leg from swinging.
前記墜落防止装置において、前記ストッパーは、請求項２に記載するように、前記頂部及び脚部から成る装置本体の側端面形状とほぼ同じ形状に形成した棒材から成り、該棒材の両端部を、前記脚部の側端面に取着した筒部材へ着脱自在に挿着することにより、前記脚部の揺動を阻止するものとすることができる。 In the fall prevention device, as described in claim 2, the stopper is formed of a bar material formed in substantially the same shape as a side end surface shape of the apparatus main body including the top part and the leg part, and both end parts of the bar material Can be removably inserted into the cylindrical member attached to the side end surface of the leg portion to prevent the leg portion from swinging.
さらに請求項３に記載するように、前記頂部に、前記筒部材に挿着したストッパーの頭部上へ進退可能に突出して、当該ストッパーの脱落を防止する係止手段を設けることも可能である。 Further, according to a third aspect of the present invention, the top portion can be provided with a locking means that protrudes on the head of the stopper inserted into the cylindrical member so as to be able to advance and retreat, and prevents the stopper from dropping off. .
また前記墜落防止装置において、請求項４に記載するように、前記揺動可能な脚部を外側へ揺動させる方向へ弾性的に付勢する手段を設けてもよい。 Further, in the fall prevention device, as described in claim 4, there may be provided means for elastically urging the swingable leg portion in the direction of swinging outward.
前記転動手段については、請求項５に記載するように、回転可能に支持されたボール状部材又はローラ状部材を有するものであって、前記頂部及び脚部それぞれの内面に当該転動手段をレールの長手方向に沿って２つ並設することが望ましい。 The rolling means includes a ball-like member or a roller-like member that is rotatably supported, as described in claim 5, and the rolling means is provided on the inner surface of each of the top portion and the leg portion. It is desirable to arrange two in parallel along the longitudinal direction of the rail.
請求項１に係る本発明の墜落防止装置は、レールの内外面を挟む一対の脚部の少なくとも一方を外側へ揺動可能に構成したので、一対の脚部をレールの内外面を挟むように装着するのも、レールから取り外すのも容易である。但し、脚部の揺動を阻止するストッパーを取り付ければ、脚部が決して開くことがないので、大きな引っ張り荷重に対して充分な強度を発揮し、墜落防止装置がレールから外れることがない。従って、頂部に設けたフック取付部に安全帯のフックを係合することにより、作業者に不測の墜落事故が発生したとしても、レールに装着した墜落防止装置が衝撃荷重を確実に支持して、作業者の落下を防止する。また、脚部及び各脚部を連結する頂部それぞれの内面に設けた転動手段をレール表面に当接させるから、レールに沿って容易に移動させることができる。それ故、安全帯のフックを係合させた墜落防止装置は、作業者の移動に追従してレール上を移動することとなる。要するに本発明に係る墜落防止装置によれば、レールを安全帯の取付設備として利用することが可能であるから、鉄道沿線であればどこでも、作業者の安全を容易に確保することができる。しかも、レールに沿った移動が自在なので、作業性を損なうこともない。 The fall prevention device of the present invention according to claim 1 is configured such that at least one of the pair of leg portions sandwiching the inner and outer surfaces of the rail can swing outward, so that the pair of leg portions sandwich the inner and outer surfaces of the rail. It is easy to install and remove from the rail. However, if a stopper that prevents the swinging of the leg portion is attached, the leg portion never opens, so that sufficient strength against a large tensile load is exhibited and the fall prevention device does not come off the rail. Therefore, by engaging the hook of the safety belt with the hook mounting part provided on the top, even if an unexpected crash accident occurs to the operator, the crash prevention device attached to the rail ensures that the impact load is supported. , Prevent the operator from falling. Further, since the rolling means provided on the inner surfaces of the leg portions and the top portions connecting the leg portions are brought into contact with the rail surface, the rolling means can be easily moved along the rails. Therefore, the fall prevention device engaged with the hook of the safety belt moves on the rail following the movement of the worker. In short, according to the crash prevention device according to the present invention, since the rail can be used as a safety belt installation facility, the safety of the operator can be easily ensured anywhere along the railway. Moreover, since the movement along the rail is free, workability is not impaired.
請求項２に係る本発明の墜落防止装置は、前記ストッパーを、頂部及び脚部から成る装置本体の側端面形状とほぼ同じ形状に形成した棒材で形成し、その両端部を、脚部の側端面に取着した筒部材へ着脱自在に挿着するものとしたので、脚部の揺動を阻止するためにストッパーを筒部材へ挿入する操作、及び、脚部を揺動可能にするため筒部材から引き抜く操作が簡単である。従って、状況に応じ、脚部を揺動不可にして墜落防止装置がレールから分離されない状態と、脚部を揺動可能にして墜落防止装置をレールに対し着脱可能である状態との切り替えを、迅速且つ容易に行える。 In the fall prevention device of the present invention according to claim 2, the stopper is formed of a bar material formed in a shape substantially the same as the shape of the side end surface of the device main body including the top portion and the leg portion, and both end portions thereof are formed on the leg portion. Since the cylindrical member attached to the side end surface is detachably attached, an operation for inserting a stopper into the cylindrical member to prevent the leg from swinging and the leg part to be swingable The operation of pulling out from the cylindrical member is simple. Therefore, depending on the situation, switching between the state where the leg part is not allowed to swing and the fall prevention device is not separated from the rail, and the state where the leg part is swingable and the fall prevention device is detachable from the rail, It can be done quickly and easily.
請求項３に係る本発明の墜落防止装置は、装置本体の頂部に、ストッパーの頭部上へ進退可能に突出して当該ストッパーの脱落を防止する係止手段を設けたので、レールへ装着して行なう所要の作業中に、誤ってストッパーが脱落するのを防止することができる。 The fall prevention device of the present invention according to claim 3 is provided with a locking means at the top of the device main body so as to protrude forward and backward on the head of the stopper and prevent the stopper from falling off. It is possible to prevent the stopper from being accidentally dropped during the required work to be performed.
請求項４に係る本発明の墜落防止装置は、揺動可能な脚部を外側へ揺動させる方向へ弾性的に付勢する手段を設けたので、ストッパーを取り外せば自動的に脚部が揺動し、レールからの取り外し作業を能率良く行える。 The fall prevention device of the present invention according to claim 4 is provided with means for elastically urging the swingable leg in the direction of swinging outward, so that the leg automatically swings when the stopper is removed. It can be moved and removed from the rail efficiently.
請求項５に係る本発明の墜落防止装置は、頂部及び脚部それぞれの内面に設ける転動手段を、回転可能に支持されたボール状部材又はローラ状部材を有するものとし、これをレールの長手方向に沿って２つ並設する構成としたので、レール装着時の墜落防止装置の姿勢が安定し、よってレールに沿った移動が非常に円滑になる。 In the fall prevention device of the present invention according to claim 5, the rolling means provided on the inner surfaces of the top part and the leg part each have a ball-like member or a roller-like member supported so as to be rotatable, and this is provided in the longitudinal direction of the rail. Since the two are arranged side by side along the direction, the posture of the fall prevention device when the rail is mounted is stabilized, and thus the movement along the rail becomes very smooth.
［第１の実施形態］
図１〜図４を用いて、本発明に係る墜落防止装置Ｔの一実施形態を説明する。図１に同墜落防止装置Ｔの正面図、図２に側面図、図３（Ａ）に平面図、図３（Ｂ）に背面図、図４に斜視図をそれぞれ示してある。この墜落防止装置Ｔは、レールＲに装着されるものであって、安全帯のランヤードを係合させることにより、使用者が墜落事故を起こしたときに落下防止の支持点となるものである。本例における墜落防止装置Ｔの装置本体１は、所定間隔を置いて平行に配置された一対の脚部２ａ，２ｂと、各脚部２ａ，２ｂの上端部を連結する頂部３とから構成される。脚部２ａ，２ｂ及び頂部３はいずれも板状又は直方体状である。従って装置本体１は、側部と底部とが開放された直方体状であって、側面から見るとコ字状の外観を有する（図２（Ａ）参照）。装置本体１の材質は、衝撃荷重に対して十分な強度を持つものであり、ステンレス鋼板のほか、アルミニウム等の金属や、ＦＲＰ・ＧＲＰ等の強化プラスチックなどの使用が可能である。
[First Embodiment]
1 to 4, an embodiment of the fall prevention device T according to the present invention will be described. FIG. 1 is a front view of the fall prevention device T, FIG. 2 is a side view, FIG. 3 (A) is a plan view, FIG. 3 (B) is a rear view, and FIG. 4 is a perspective view. The fall prevention device T is attached to the rail R, and is a supporting point for preventing the fall when the user causes a fall accident by engaging the lanyard of the safety belt. The apparatus main body 1 of the fall prevention apparatus T in this example includes a pair of leg portions 2a and 2b arranged in parallel at a predetermined interval, and a top portion 3 that connects the upper end portions of the leg portions 2a and 2b. The The legs 2a, 2b and the top 3 are all plate-shaped or rectangular parallelepiped. Therefore, the apparatus main body 1 has a rectangular parallelepiped shape in which the side and the bottom are opened, and has a U-shaped appearance when viewed from the side (see FIG. 2A). The material of the apparatus main body 1 has sufficient strength against an impact load, and in addition to a stainless steel plate, a metal such as aluminum or a reinforced plastic such as FRP / GRP can be used.
頂部３の上面中央部には、ランヤードのフックＦ（図４参照）を係合させるためのフック取付部１０が設けられる。本例のフック取付部１０はアイナット又はアイボルトを用いてリング状としたが、これに限定されるものではない。 A hook mounting portion 10 for engaging a lanyard hook F (see FIG. 4) is provided at the center of the top surface of the top portion 3. Although the hook attachment part 10 of this example was made into a ring shape using an eyenut or an eyebolt, it is not limited to this.
脚部２ａ，２ｂ及び頂部３の内面には、例えばボールキャスタ等からなる転動手段４，５が、各２個ずつレールＲの長手方向に沿って取り付けられる（図１（Ａ）参照）。脚部２ａ，２ｂの転動手段４，４はレールＲの腹部側面ｒ２に当接し、頂部３の転動手段５はレールＲの頭部踏み面ｒ１に当接するよう配置されている。つまり、頂部３の転動手段５をレール踏み面ｒ１に当接させたとき、脚部２ａ，２ｂの転動手段４，４がレールＲの腹部側面ｒ２に対向するよう高さ位置が設定されると共に。脚部２ａ，２ｂの転動手段４，４の間隔が、レール腹部の厚み寸法とほぼ同等か又は若干広く設定される（図２（Ａ）参照）。なお転動手段４，５は、ローラ状の部材で構成することも可能である。 On the inner surfaces of the leg portions 2a and 2b and the top portion 3, two rolling means 4 and 5 made of, for example, ball casters are attached along the longitudinal direction of the rail R (see FIG. 1A). The rolling means 4, 4 of the legs 2 a, 2 b are disposed so as to contact the abdomen side surface r 2 of the rail R, and the rolling means 5 of the top 3 is disposed to contact the head tread surface r 1 of the rail R. That is, the height position is set so that the rolling means 4 and 4 of the legs 2a and 2b face the abdomen side surface r2 of the rail R when the rolling means 5 of the top 3 is brought into contact with the rail tread surface r1. As well. The distance between the rolling means 4 and 4 of the legs 2a and 2b is set to be approximately equal to or slightly wider than the thickness of the rail abdomen (see FIG. 2A). In addition, the rolling means 4 and 5 can also be comprised with a roller-shaped member.
本例では、脚部の一方２ｂを、ヒンジ６により、頂部３に対し略同じ水平位置まで揺動可能に構成した（図２（Ｂ）参照）。また上記ヒンジ６部分には、コイルばね等の、脚部２ｂを外側へ揺動する方向へ付勢する手段７が設けられる。あるいは、ヒンジ６にバネ付き蝶番を用いてもよい。 In this example, one of the leg portions 2b is configured to be swingable to substantially the same horizontal position with respect to the top portion 3 by the hinge 6 (see FIG. 2B). The hinge 6 is provided with means 7 such as a coil spring that urges the leg 2b to swing outward. Alternatively, a hinge with a spring may be used for the hinge 6.
脚部２ａ，２ｂの側端面には有底の筒部材８が取着され、この筒部材８に、装置本体１の側端面形状と略等しいコ字状（又はＵ字状）に形成した棒材から成るストッパー２０の両端部２１を着脱自在に挿着できるようなされている。ストッパー２０を構成する棒材には、容易に変形しない部材、例えばステンレス鋼製で直径が８ｍｍ程度の丸棒が使用される。このストッパー２０を筒部材８に挿着すると（図２（Ａ））、脚部２ｂの揺動が阻止され、脚部２ａ，２ｂ間でレールＲの腹部を挟持した状態が維持される。ストッパー２０を筒部材８から引き抜くと（図２（Ｂ）参照）、脚部２ｂが付勢手段７により自動的に外側へ揺動し、装置本体１をレールＲから簡単に取り外すことができる。図示のように、ストッパー２０は、装置本体１の両方の側端面に装着するのが望ましいが、必要な強度が得られるのであれば、一方の側端面だけに配設することも妨げない。 A bottomed cylindrical member 8 is attached to the side end surfaces of the legs 2a and 2b, and a rod formed in a U-shape (or U-shape) substantially equal to the side end surface shape of the apparatus main body 1 is attached to the cylindrical member 8. Both ends 21 of the stopper 20 made of a material can be removably inserted. As the bar constituting the stopper 20, a member that is not easily deformed, for example, a round bar made of stainless steel and having a diameter of about 8 mm is used. When the stopper 20 is inserted into the cylindrical member 8 (FIG. 2A), the leg 2b is prevented from swinging, and the state where the abdomen of the rail R is sandwiched between the legs 2a and 2b is maintained. When the stopper 20 is pulled out from the cylindrical member 8 (see FIG. 2B), the leg 2b is automatically swung outward by the biasing means 7, and the apparatus main body 1 can be easily detached from the rail R. As shown in the drawing, it is desirable that the stoppers 20 are mounted on both side end surfaces of the apparatus main body 1, but it is not hindered to be disposed only on one side end surface as long as the required strength can be obtained.
なお、ストッパー２０の抜け止め手段として、装置本体１の頂部３上面に、ラッチ錠等の、進退可能に突出する係止凸部９ａを備えた係止手段９を設けた。該係止凸部９ａをストッパー２０の上方へ突出させることにより、ストッパー２０の脱落を阻止する。本例の係止手段９は、操作レバー９ｂにより係止凸部９ａを進退させるものであり、図１（Ｂ）に示すように、操作レバー９ｂを引き上げると係止凸部９ａが後退してストッパー２０の抜き取りが可能となり、操作レバー９ｂを押し下げると係止凸部９ａが突出して、ストッパー２０の引き抜きを不可にする。 In addition, as a means for preventing the stopper 20 from coming off, a locking means 9 provided with a locking projection 9 a such as a latch lock that protrudes forward and backward is provided on the top surface of the top 3 of the apparatus body 1. By causing the locking projection 9a to protrude above the stopper 20, the stopper 20 is prevented from falling off. The locking means 9 of this example is for moving the locking projection 9a forward and backward by the operating lever 9b. As shown in FIG. 1B, when the operating lever 9b is pulled up, the locking projection 9a is retracted. The stopper 20 can be pulled out, and when the operation lever 9b is pushed down, the locking projection 9a protrudes and the stopper 20 cannot be pulled out.
またストッパー２０の適所に繋留部２２（図２参照）を形成し、この繋留部２２とフック取付部１０とを適当長さのチェーン等（図示省略）で繋いでおけば、ストッパー２０を取り外したときの紛失防止を図ることができる。 Further, the anchoring portion 22 (see FIG. 2) is formed at an appropriate position of the stopper 20, and the stopper 20 is removed by connecting the anchoring portion 22 and the hook mounting portion 10 with an appropriate length chain or the like (not shown). It is possible to prevent time loss.
前述の如く構成された本発明に係る墜落防止装置Ｔは、次のような手順により、レールＲに対し簡単に着脱することができる。まず取り付けるに当たっては、ストッパー２０を取り外し、一方の脚部２ｂを外側へ揺動させて開いた状態とする（図２（Ｂ））。これにより、レールＲへの取り付けが容易となる。次いで、墜落防止装置Ｔの頂部３をレールＲの踏み面ｒ１上に載置すると共に、固定された他方の脚部２ａをレールＲ側面に押し当てる。そして、開いた状態の脚部２ｂをレールＲの側面へ向けて揺動させたのち、ストッパー２０を装置本体１の側端面の筒部材８に挿着し、さらに、係止手段９の係止凸部９ａを突出させて、ストッパー２０の脱落を防止する。これにより、一対の脚部２ａ，２ｂそれぞれに設けた転動手段４，４がレールＲ腹部の内外側面ｒ２を挟持すると共に、ストッパー２０により脚部２ｂの揺動が阻止されるため、墜落防止装置ＴがレールＲから分離することはない。 The fall prevention device T according to the present invention configured as described above can be easily attached to and detached from the rail R by the following procedure. First, when attaching, the stopper 20 is removed, and one leg portion 2b is opened by swinging outward (FIG. 2B). Thereby, attachment to the rail R becomes easy. Next, the top portion 3 of the fall prevention device T is placed on the tread surface r1 of the rail R, and the other fixed leg portion 2a is pressed against the side surface of the rail R. Then, after swinging the leg portion 2b in the open state toward the side surface of the rail R, the stopper 20 is inserted into the cylindrical member 8 on the side end surface of the apparatus body 1, and the locking means 9 is further locked. The protruding portion 9a is protruded to prevent the stopper 20 from falling off. As a result, the rolling means 4 and 4 provided on each of the pair of legs 2a and 2b sandwich the inner and outer surfaces r2 of the rail R abdomen, and the stopper 20 prevents the leg 2b from swinging. The device T is not separated from the rail R.
頂部３上面のフック取付部１０には、図４に示す如く、作業者が装着している安全帯のランヤードＹのフックＦを係合させる。これは、墜落防止装置ＴをレールＲへ装着する前に行なうのが望ましいが、レールＲへの装着後でも可能である。 As shown in FIG. 4, the hook F of the lanyard Y of the safety belt worn by the operator is engaged with the hook mounting portion 10 on the top surface of the top portion 3. This is preferably performed before the fall prevention device T is attached to the rail R, but it is possible even after the fall prevention device T is attached to the rail R.
墜落防止装置Ｔは、脚部２ａ，２ｂ及び頂部３の内面に設けた転動手段４，５がレールＲ表面に当接するから、作業者の行動に合わせて、レールＲに沿って円滑に移動することができる。それ故、作業者が行なう各種作業に支障を来すおそれがない。また、墜落防止装置ＴがレールＲから分離することは決してないから、万一作業者が墜落事故を起こしたときには、衝撃荷重を支えて、作業者の落下を確実に防止する。 In the fall prevention device T, the rolling means 4 and 5 provided on the inner surfaces of the legs 2a and 2b and the top 3 come into contact with the surface of the rail R. can do. Therefore, there is no possibility of hindering various operations performed by the operator. In addition, since the fall prevention device T is never separated from the rail R, in the unlikely event that a worker causes a crash, the impact load is supported to reliably prevent the worker from falling.
なお、レール継目やポイント切換地点など、レールＲが不連続になる個所では、墜落防止装置ＴをレールＲから一旦取り外し、再度装着する必要が生じる。本例の墜落防止装置Ｔは、ストッパー２０を引き抜くと、付勢手段７の作用で、一方の脚部２ｂが開く方向へ自動的に揺動するため、即座にレールＲから取り外せる。そして、レールＲへの装着位置を変更した後は、前述の手順により、レールＲから分離しない取付状態とすることが迅速に行える。このように本発明に係る墜落防止装置Ｔは、付け替え作業が必要な場合でも、付け替え作業を短時間で実行できるから、作業者の墜落事故の危険性を増大させるおそれがない。 In places where the rail R is discontinuous, such as a rail joint or a point switching point, it is necessary to remove the fall prevention device T from the rail R and install it again. When the stopper 20 is pulled out, the fall prevention device T of this example automatically swings in the opening direction of the one leg 2b by the action of the urging means 7, so that it can be immediately removed from the rail R. Then, after changing the mounting position on the rail R, it is possible to quickly make the mounting state without separation from the rail R by the above-described procedure. Thus, since the fall prevention device T according to the present invention can perform the replacement work in a short time even when the replacement work is necessary, there is no possibility of increasing the risk of the operator's fall accident.
前記墜落防止装置Ｔをレールに取り付けたときの引張強度を測定する実験を行なった。実験に用いた墜落防止装置Ｔは、厚さ２ｍｍのステンレス鋼板を用いて製作したものであり、図５（Ａ）〜（Ｄ）に示す装置本体１の外形寸法は、高さＨ＝１２０ｍｍ、正面側の幅Ｗ＝１００ｍｍ、側面側の幅Ｓ＝１０５ｍｍであり、脚部２ａ，２ｂの厚みＰ及び頂部３の厚みＱはいずれも１５ｍｍである。ストッパー２０は、直径８ｍｍのステンレス製丸棒をコ字状に成形したものを用い、装置本体１の両側端面に配設するものとした。転動手段４，５には、ボール部分が直径約１６ｍｍのステンレス軸受鋼から成る鋼球であって、ケース部分が直径２４ｍｍ高さ約１６．５ｍｍのステンレス製円筒であるボールキャスタを使用した。 An experiment was conducted to measure the tensile strength when the fall prevention device T was attached to a rail. The fall prevention device T used in the experiment was manufactured using a stainless steel plate having a thickness of 2 mm, and the external dimensions of the device main body 1 shown in FIGS. 5 (A) to (D) are as follows: height H = 120 mm, The width W on the front side is 100 mm, the width S on the side surface is 105 mm, and the thickness P of the legs 2a and 2b and the thickness Q of the top 3 are both 15 mm. The stopper 20 is a U-shaped stainless steel round bar having a diameter of 8 mm, and is disposed on both end faces of the apparatus main body 1. As the rolling means 4 and 5, a ball caster was used in which the ball portion was a steel ball made of stainless bearing steel having a diameter of about 16 mm and the case portion was a stainless steel cylinder having a diameter of 24 mm and a height of about 16.5 mm.
実験方法は、図６に示す如く、レールＲに装着した墜落防止装置Ｔのフック取付部１０に、安全帯のランヤードＹ（又はこれと同等の十分な強度を持ったロープ）の一端に設けたフックＦを係合させ、上記ランヤードＹ（又はロープ）の他端を、レールＲの近辺に存在する固定構造物Ｋ（例えば電柱）に適宜の連結部材Ｊで連結する。このとき、墜落防止装置Ｔのフック取付部１０と固定構造物ＫにおけるランヤードＹ（ロープ）の連結部とを結ぶ線が、なるべく水平となるよう設定する。これは、墜落防止装置Ｔに水平方向の荷重が作用したときに、最も悪影響が出やすいと考えられるからである。ランヤードＹ（ロープ）の途中に、張線装置Ｌ（商品名シメラーやシメール等）とテンションメータＭとを設ける。そして張線装置Ｌを操作してランヤードＹの張力を増大させ、墜落防止装置Ｔに異常が見られたときの張力をテンションメータＭで読み取る。 As shown in FIG. 6, the experiment method was provided at one end of a safety lanyard Y (or a rope having sufficient strength equivalent to this) on the hook mounting portion 10 of the fall prevention device T mounted on the rail R. The hook F is engaged, and the other end of the lanyard Y (or rope) is connected to a fixed structure K (for example, a utility pole) existing in the vicinity of the rail R by an appropriate connecting member J. At this time, the line connecting the hook attaching portion 10 of the fall prevention device T and the connecting portion of the lanyard Y (rope) in the fixed structure K is set to be as horizontal as possible. This is because when a load in the horizontal direction is applied to the fall prevention device T, it is considered that the most adverse effect is likely to occur. In the middle of the lanyard Y (rope), a tension device L (product name: Shimmer, Shemale, etc.) and a tension meter M are provided. Then, the tension device M is operated to increase the tension of the lanyard Y, and the tension meter M reads the tension when the fall prevention device T is abnormal.
実験の結果、墜落防止装置Ｔに変形が生じたときの張力は、１３．２ｋＮであった。但し、変形が生じたときに、墜落防止装置ＴがレールＲから外れることはなかった。厚生労働省告示第３８号に規定される「安全帯の規格」によれば、フックには、１１．５ｋＮの引張荷重に対して破断又は機能を喪失する程度の変形を生じないことが要求されている。本発明に係る墜落防止装置Ｔは、レールを安全帯の取付設備と見たとき、フックＦの延長部と考えれば、上記の安全基準を十分に満たしていることが明らかである。 As a result of the experiment, the tension when the fall prevention device T was deformed was 13.2 kN. However, the fall prevention device T did not come off the rail R when deformation occurred. According to the “Safety Belt Standard” prescribed in Ministry of Health, Labor and Welfare Notification No. 38, hooks are required not to be deformed to the extent that they break or lose their function against a tensile load of 11.5 kN. Yes. It is clear that the fall prevention device T according to the present invention sufficiently satisfies the above-mentioned safety standard when the rail is regarded as an installation facility for a safety belt and is considered as an extension of the hook F.
［その他の実施形態］
図７に示す如く、揺動可能とする一方の脚部２ｂの分割位置Ｄを、頂部３より下方に設定することも考えられる。あるいは、図８に示す如く、頂部３の途中に分割位置Ｄを設定することも妨げない。
[Other Embodiments]
As shown in FIG. 7, it is also conceivable to set the division position D of one leg portion 2 b that can be swung below the top portion 3. Alternatively, as shown in FIG. 8, setting the division position D in the middle of the top 3 is not hindered.
さらには、図９に示すように、両方の脚部２ａ，２ｂ共に揺動可能とすることも可能である。 Furthermore, as shown in FIG. 9, both the leg portions 2a and 2b can be swingable.
Ｔ…墜落防止装置 １…装置本体 ２ａ，２ｂ…脚部 ３…頂部 ４，５…転動手段 ６…ヒンジ ７…付勢手段 ８…筒部材 ９…係止手段 ９ａ…係止凸部 １０…フック取付部 ２０…ストッパー ２１…端部 ２２…繋留部 Ｒ…レール ｒ１…踏み面 ｒ２…腹部側面 Ｆ…フック Ｙ…ランヤード T ... Fall prevention device 1 ... Device body 2a, 2b ... Leg 3 ... Top 4, 5 ... Rolling means 6 ... Hinge 7 ... Biasing means 8 ... Cylindrical member 9 ... Locking means 9a ... Locking convex part 10 ... Hook mounting portion 20 ... Stopper 21 ... End portion 22 ... Mounting portion R ... Rail r1 ... Tread surface r2 ... Abdominal side F: Hook Y ... Lanyard
Claims (5)
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| Application Number | Priority Date | Filing Date | Title |
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| JP2008087333A JP2009240357A (en) | 2008-03-28 | 2008-03-28 | Fall preventive device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008087333A JP2009240357A (en) | 2008-03-28 | 2008-03-28 | Fall preventive device |
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| JP2009240357A true JP2009240357A (en) | 2009-10-22 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011206245A (en) * | 2010-03-30 | 2011-10-20 | Yokogawa Sumikin Bridge Corp | Moving type safety belt mounting device for bridge construction |
| CN101708356B (en) * | 2009-12-12 | 2012-03-21 | 王朝普 | Fall protection device for working at height |
| JP2013244090A (en) * | 2012-05-24 | 2013-12-09 | Yokogawa Sumikin Bridge Corp | Mobile safety harness attaching device for bridgework |
| CN103893929A (en) * | 2014-03-29 | 2014-07-02 | 国家电网公司 | Combined high-strength falling prevention track with tail end locks |
| CN103893931A (en) * | 2014-03-29 | 2014-07-02 | 国家电网公司 | High-strength composite falling prevention rail |
| 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 |
| WO2017074445A1 (en) * | 2015-10-30 | 2017-05-04 | Rooftop Anchor, Inc | Monorail system |
| KR101773773B1 (en) * | 2015-12-24 | 2017-09-01 | 한국산업안전보건공단 | Fixing Apparatus of Life Rope |
| KR20180083197A (en) * | 2017-01-12 | 2018-07-20 | 두산중공업 주식회사 | Safety Belt System For Sliding House |
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2008
- 2008-03-28 JP JP2008087333A patent/JP2009240357A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101708356B (en) * | 2009-12-12 | 2012-03-21 | 王朝普 | Fall protection device for working at height |
| JP2011206245A (en) * | 2010-03-30 | 2011-10-20 | Yokogawa Sumikin Bridge Corp | Moving type safety belt mounting device for bridge construction |
| 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 |
| CN103893929A (en) * | 2014-03-29 | 2014-07-02 | 国家电网公司 | Combined high-strength falling prevention track with tail end locks |
| CN103893931A (en) * | 2014-03-29 | 2014-07-02 | 国家电网公司 | High-strength composite falling prevention rail |
| WO2017074445A1 (en) * | 2015-10-30 | 2017-05-04 | Rooftop Anchor, Inc | Monorail system |
| KR101773773B1 (en) * | 2015-12-24 | 2017-09-01 | 한국산업안전보건공단 | Fixing Apparatus of Life Rope |
| KR20180083197A (en) * | 2017-01-12 | 2018-07-20 | 두산중공업 주식회사 | Safety Belt System For Sliding House |
| KR101883269B1 (en) * | 2017-01-12 | 2018-07-30 | 두산중공업 주식회사 | Safety Belt System For Sliding House |
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