JP6448102B1 - Rebar fall prevention jig, rebar suspension jig, and rebar fall prevention method - Google Patents
Rebar fall prevention jig, rebar suspension jig, and rebar fall prevention method Download PDFInfo
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Abstract
【課題】吊り下げ部材が切れた場合等であっても、鉄筋を吊り下げた状態を維持でき、鉄筋を吊り下げた状態で行う現場作業の安全性を向上させることのできる鉄筋落下防止治具、鉄筋吊り下げ治具及び鉄筋落下防止方法を提供する【解決手段】鉄筋落下防止治具１０は、鉄筋落下防止治具１０は、図１に示すように、棒状の雄螺子棒２２と、雄螺子棒２２に取り付けられるシャックル（回転金具）２４とから構成される。鉄筋吊り下げ治具１２は、鉄筋落下防止治具１０と、吊り天秤（保持体）１０６と、スリングベルト（吊り下げ部材）１０８と、ワイヤー（落下防止部材）５２と、を備えて構成される。【選択図】図１The present invention provides a reinforcing bar drop prevention jig that can maintain a state in which a reinforcing bar is suspended even when a hanging member is cut, and can improve the safety of field work performed while the reinforcing bar is suspended. A rebar suspension jig and a method for preventing rebar fall are provided. A rebar drop prevention jig 10 is composed of a rod-shaped male screw rod 22 and a male screw rod 22 as shown in FIG. A shackle (rotating metal fitting) 24 attached to the screw rod 22 is configured. The reinforcing bar hanging jig 12 includes a reinforcing bar drop preventing jig 10, a hanging balance (holding body) 106, a sling belt (hanging member) 108, and a wire (falling prevention member) 52. . [Selection] Figure 1
Description
本発明は、吊るした鉄筋が落下するのを防止する鉄筋落下防止治具、鉄筋吊り下げ治具、及びその鉄筋落下防止治具を使用した鉄筋落下防止方法に関する。 The present invention relates to a reinforcing bar drop prevention jig that prevents a suspended reinforcing bar from dropping, a reinforcing bar suspension jig, and a reinforcing bar drop prevention method using the reinforcing bar drop prevention jig.
従来より、橋梁の橋脚などを形成するために、その構成部材である縦筋（鉄筋）を工事現場において吊り下げることが行われている。図７（ａ）に、縦筋（鉄筋）１００を吊り下げる公知の鉄筋吊り下げ治具１０２を示す。鉄筋吊り下げ治具１０２は、レッカー装置（図示しない）が備えるフック１０４に吊り下げられ空中に保持される吊り天秤（保持体）１０６と、吊り天秤１０６の長手方向に複数個配設した帯状のスリングベルト（吊り下げ部材）１０８とを備えて構成されている。図７（ｂ）に示すように、スリングベルト１０８の一端には、吊り天秤１０６に連結するためのリング状のアイ１１０が設けられ、スリングベルト１０８の他端には、縦筋１００に連結するためのリング状のアイ１１２が設けられている。鉄筋吊り下げ治具１０２は、アイ１１０を、図７（ａ）に示すように、シャックル１１４及びラッチロック１１６を介して吊り天秤１０６に連結し、アイ１１２を、図７（ｃ）に示すように、ひばり結びにより、縦筋１００に連結した状態で、縦筋１００を吊り下げることができる。 2. Description of the Related Art Conventionally, in order to form a bridge pier or the like, vertical bars (reinforcing bars), which are constituent members, are suspended at a construction site. FIG. 7A shows a known reinforcing bar suspending jig 102 for suspending vertical bars (reinforcing bars) 100. Reinforcing bar suspension jigs 102 are a suspension balance (holding body) 106 suspended in a hook 104 provided in a tow device (not shown) and held in the air, and a plurality of strip-like suspension jigs 102 disposed in the longitudinal direction of the suspension balance 106. A sling belt (suspending member) 108 is provided. As shown in FIG. 7B, a ring-shaped eye 110 is provided at one end of the sling belt 108 to connect to the suspension balance 106, and the other end of the sling belt 108 is connected to the vertical bar 100. A ring-shaped eye 112 is provided. As shown in FIG. 7A, the rebar suspending jig 102 connects the eye 110 to the suspension balance 106 via a shackle 114 and a latch lock 116, and the eye 112 as shown in FIG. 7C. In addition, the vertical streak 100 can be hung in a state of being connected to the vertical streak 100 by a barb knot.
また、特許文献１には、クレーン（楊重手段）により釣支される治具本体（支持部材）を有し、治具本体にチェーン（吊り下げ部材）を水平方向に複数個配設し、各チェーンの先端に鉄筋と接続自在なシャックル（接続部材）を設けて構成した鉄筋吊り下げ治具が記載されている。 Patent Document 1 has a jig body (supporting member) supported by a crane (weighing means), and a plurality of chains (hanging members) are horizontally arranged on the jig body. There is described a reinforcing bar hanging jig configured by providing a shackle (connecting member) that can be connected to a reinforcing bar at the tip of each chain.
しかしながら、図７（ａ）に示す鉄筋吊り下げ治具１０２では、劣化によりスリングベルト１０８が切れ、又は、縦筋１００が衝撃を受けてアイ１１２のひばり結びが緩んで縦筋１００からスリングベルト１０８が離脱した場合、縦筋１００が落下し、縦筋１００を吊り下げておくことができない。また、特許文献１の鉄筋吊り下げ治具では、劣化によりチェーンが切れた場合、縦筋が落下し、縦筋を吊り下げておくことができない。 However, in the reinforcing bar suspension jig 102 shown in FIG. 7A, the sling belt 108 is cut due to deterioration, or the vertical bars 100 receive an impact and the knots of the eyes 112 are loosened, so that the sling belts 108 extend from the vertical bars 100. When the detachment occurs, the vertical stripe 100 falls and the vertical stripe 100 cannot be suspended. Further, in the reinforcing bar hanging jig of Patent Document 1, when the chain is broken due to deterioration, the vertical bars fall and the vertical bars cannot be suspended.
本発明は、係る事由に鑑みてなされたものであり、その目的は、吊り下げ部材が切れた場合、又は、吊り下げ部材が鉄筋（縦筋）から離脱した場合であっても、鉄筋を吊り下げた状態を維持でき、鉄筋を吊り下げた状態で行う現場作業の安全性を向上させることのできる鉄筋落下防止治具、鉄筋吊り下げ治具及び鉄筋落下防止方法を提供することにある。 The present invention has been made in view of the above reasons, and the purpose of the present invention is to hang a reinforcing bar even when the hanging member is cut or when the hanging member is detached from the reinforcing bar (longitudinal). An object of the present invention is to provide a reinforcing bar drop prevention jig, a reinforcing bar suspension jig, and a reinforcing bar drop prevention method capable of maintaining the lowered state and improving the safety of field work performed in a state where the reinforcing bar is suspended.
上記目的を達成するために、請求項１に記載の鉄筋落下防止治具は、空中に保持される保持体に釣支された吊り下げ部材によって吊り下げられる鉄筋の落下を防止する鉄筋落下防止治具であり、棒状であり、一端側に、長手方向に対して垂直方向の貫通孔が設けられ、少なくとも他端側に、雄螺子が設けられた雄螺子棒と、前記雄螺子棒の前記貫通孔に貫通される回転軸を有し、該回転軸を回転中心として回転する回転金具と、を備え、前記鉄筋の上端に螺合された雌螺子体に、前記雄螺子棒の他端側が螺入され、前記保持体に釣支される落下防止部材に、前記回転金具が連結されるように構成されたことを特徴とする。 In order to achieve the above object, the reinforcing bar drop prevention jig according to claim 1 is a reinforcing bar drop prevention treatment for preventing the dropping of a reinforcing bar suspended by a suspension member supported by a holding body held in the air. A male screw rod provided with a through hole in a direction perpendicular to the longitudinal direction on one end side and a male screw provided on at least the other end side, and the penetration of the male screw rod. A rotating metal fitting that has a rotating shaft penetrating through the hole and rotates about the rotating shaft, and the other end side of the male screw rod is screwed into a female screw body screwed into the upper end of the reinforcing bar. The rotating metal fitting is connected to a fall prevention member that is inserted and supported by the holding body.
請求項２に記載の鉄筋吊り下げ治具は、前記鉄筋落下防止治具と、前記保持体と、前記吊り下げ部材と、前記落下防止部材と、を備えたことを特徴とする。 According to a second aspect of the present invention, there is provided a reinforcing bar suspension jig comprising the reinforcing bar drop prevention jig, the holding body, the suspension member, and the fall prevention member.
請求項３に記載の鉄筋落下防止方法は、前記請求項１に記載する前記鉄筋落下防止治具を使用して、空中に保持される保持体に釣支された吊り下げ部材によって吊り下げられる鉄筋の落下を防止する鉄筋落下防止方法であり、前記鉄筋の上端に螺合された雌螺子体に、前記鉄筋落下防止治具の前記雄螺子棒の他端側を螺入する工程と、前記保持体に釣支される落下防止部材に、前記鉄筋落下防止治具の前記回転金具を連結する工程と、を含むことを特徴とする。 According to a third aspect of the present invention, there is provided the reinforcing bar drop prevention method according to the first aspect, wherein the reinforcing bar drop prevention jig is suspended by a suspension member that is supported by a holding body held in the air. A method of preventing the fall of the reinforcing bar, the step of screwing the other end of the male screw rod of the reinforcing bar drop prevention jig into the female screw body screwed into the upper end of the reinforcing bar, and the holding And a step of connecting the rotary fitting of the reinforcing bar drop prevention jig to a fall prevention member that is supported by the body.
請求項４に記載の鉄筋落下防止方法は、前記吊り下げ部材が前記鉄筋を吊り下げているとき、前記保持体に釣支される落下防止部材に、該鉄筋の重量が負荷されないことを特徴とする。 The reinforcing bar drop prevention method according to claim 4, wherein when the suspension member suspends the reinforcing bar, the fall prevention member that is supported by the holding body is not loaded with the weight of the reinforcing bar. To do.
請求項５に記載の鉄筋落下防止方法は、前記吊り下げ部材が前記鉄筋を吊り下げているとき、前記回転金具は、前記回転中心から斜め上に延びる方向であることを特徴とする。 The reinforcing bar drop prevention method according to claim 5 is characterized in that when the suspension member suspends the reinforcing bar, the rotating metal fitting is in a direction extending obliquely upward from the rotation center.
本発明の鉄筋落下防止治具、鉄筋吊り下げ治具及び鉄筋落下防止方法によれば、吊り下げ部材が切れた場合、又は、吊り下げ部材が鉄筋から離脱した場合であっても、落下防止部材が鉄筋を保持し、鉄筋を吊り下げた状態を維持でき、鉄筋を吊り下げた状態で行う現場作業の安全性を向上させることができる。 According to the reinforcing bar drop prevention jig, the reinforcing bar suspension jig and the reinforcing bar drop prevention method of the present invention, even when the hanging member is cut or when the hanging member is detached from the reinforcing bar, the falling prevention member Can hold the rebar, maintain the state where the rebar is suspended, and improve the safety of field work performed with the rebar suspended.
以下、本発明を実施するための形態を、図面に基づいて説明する。図１及び図２において、符号１０は、本発明の鉄筋落下防止治具を示し、図２において、符号１２は、本発明の鉄筋吊り下げ治具を示す。 Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. 1 and 2, reference numeral 10 indicates a reinforcing bar drop prevention jig of the present invention, and in FIG. 2, reference numeral 12 indicates a reinforcing bar hanging jig of the present invention.
鉄筋落下防止治具１０及び鉄筋吊り下げ治具１２は、図２（ａ）に示すように、空中に保持される吊り天秤（保持体）１０６に釣支されたスリングベルト（吊り下げ部材）１０８によって吊り下げられる縦筋（鉄筋）１００の落下を防止できる治具である。縦筋１００は、図２（ｂ）に示すように、外周に雄螺子１８が設けられ、長手方向に沿った互いに平行な二つの平坦面２０が設けられた異形棒鋼と呼ばれる鉄筋である。 As shown in FIG. 2A, the reinforcing bar drop prevention jig 10 and the reinforcing bar hanging jig 12 are a sling belt (hanging member) 108 supported by a suspension balance (holding body) 106 held in the air. This is a jig that can prevent the vertical bars (reinforcing bars) 100 that are suspended from falling. As shown in FIG. 2 (b), the longitudinal bars 100 are reinforcing bars called deformed steel bars having male screws 18 on the outer periphery and two flat surfaces 20 parallel to each other along the longitudinal direction.
鉄筋落下防止治具１０は、図１に示すように、棒状の雄螺子棒２２と、雄螺子棒２２に取り付けられるシャックル（回転金具）２４とから構成される。雄螺子棒２２は、上記縦筋１００と同じ鉄筋を切断して形成され、縦筋１００と同様に、外周に雄螺子１８を有し、平行な二つの平坦面２０を有する。雄螺子棒２２の一端２６側に、図３（ａ）に示すように、長手方向に対して垂直方向の貫通孔２８が設けられている。シャックル２４は、市販のボルトナット式（ワリピン式）のシャックルであり、図３（ｂ）及び（ｃ）に示すように、二つの先端２９付近に貫通孔３０が設けられたＵ字状の本体３４と、先端３１付近の外周に雄螺子が設けられ、ナット３２が螺合されワリピン３９が挿入されて本体３４に連結されるボルト（回転軸）３８とから構成されている。シャックル２４は、このボルト（回転軸）３８が雄螺子棒２２の貫通孔２８に貫通されてシャックル２４が雄螺子棒２２に取り付けられることにより、ボルト（回転軸）３８を回転中心として回転し得る。図示しないが、本体の一の先端付近に設けた雌螺子にアイボルトをねじ込むねじ込み式のシャックルを使用してもよい。さらに、その他の形式のシャックルを使用してもよい。 As shown in FIG. 1, the reinforcing bar drop prevention jig 10 includes a rod-shaped male screw rod 22 and a shackle (rotating metal fitting) 24 attached to the male screw rod 22. The male screw rod 22 is formed by cutting the same reinforcing bars as the vertical bars 100. Like the vertical bars 100, the male screw bars 22 have male screws 18 on the outer periphery and two parallel flat surfaces 20. As shown in FIG. 3A, a through hole 28 perpendicular to the longitudinal direction is provided on the one end 26 side of the male screw rod 22. The shackle 24 is a commercially available bolt and nut type (wari pin type) shackle, and as shown in FIGS. 3B and 3C, a U-shaped main body provided with through holes 30 in the vicinity of two tips 29. , And a bolt (rotating shaft) 38 that is connected to the main body 34 by a nut 32 being screwed together and a waling pin 39 inserted therein. The shackle 24 can be rotated about the bolt (rotating shaft) 38 by rotating the bolt (rotating shaft) 38 through the through hole 28 of the male screw rod 22 and attaching the shackle 24 to the male screw rod 22. . Although not shown, a screw-type shackle in which an eyebolt is screwed into a female screw provided near one end of the main body may be used. In addition, other types of shackles may be used.
以下、鉄筋落下防止治具１０を使用した鉄筋落下防止方法について説明する。特に明示しない限り、時系列に従って説明する。まず、図５に示すように、５本のスリングベルト１０８のアイ１１０を、シャックル１１４及びスイベルフック１１７を介して吊り天秤１０６に連結し、スリングベルト１０８のアイ１１２を、ひばり結び（図７（ｃ）に示す）により、縦筋１００に連結する。スイベルフックとは、二つの部材を回転可能に連結できるフックである。縦筋１００の一端にはカプラー（雌螺子体）が螺合され固定される。アイ１１２の結び目が緩くなって縦筋１００がアイ１１２に対して下方向へ滑っても、縦筋１００の一端に固定されたカプラー４０が結び目で止まり、縦筋１００がアイ１１２から落下し難くなる。カプラー４０は、一の鉄筋と他の鉄筋とを縦方向に連結するためのものであって市販されており、一の鉄筋及び他の鉄筋を螺入する螺子孔５０（図４に示す）を有する。吊り天秤１０６には、シャックル４２を介してワイヤー４４の一端が連結され、ワイヤー４４の他端は、シャックル４６を介してレッカーリング４８に連結されている。上記作業は、縦筋１００等の全ての部材が地上に載置された状態で行われ、この時、図５に示すように、スリングベルト１０８は弛んでいる。 Hereinafter, a reinforcing bar drop prevention method using the reinforcing bar drop prevention jig 10 will be described. Unless otherwise specified, description will be made according to the time series. First, as shown in FIG. 5, the eyes 110 of the five sling belts 108 are connected to the suspension balance 106 via the shackle 114 and the swivel hook 117, and the eyes 112 of the sling belt 108 are connected with a spear (see FIG. 7 ( It is connected to the vertical streak 100 by (shown in c). The swivel hook is a hook that can rotatably connect two members. A coupler (female screw body) is screwed and fixed to one end of the vertical bar 100. Even if the knot of the eye 112 becomes loose and the vertical muscle 100 slides downward with respect to the eye 112, the coupler 40 fixed to one end of the vertical muscle 100 stops at the knot, and the vertical muscle 100 does not easily fall from the eye 112. Become. The coupler 40 is used to connect one reinforcing bar and another reinforcing bar in the longitudinal direction, and is commercially available, and has a screw hole 50 (shown in FIG. 4) into which the one reinforcing bar and the other reinforcing bar are screwed. Have. One end of a wire 44 is connected to the suspension balance 106 via a shackle 42, and the other end of the wire 44 is connected to a wrecker ring 48 via a shackle 46. The above operation is performed in a state where all members such as the vertical bars 100 are placed on the ground. At this time, as shown in FIG. 5, the sling belt 108 is slack.
次に、一端に端部リング５４を他端に端部リング５６を有するワイヤー５２（落下防止部材、図２に示す）が準備される。ワイヤー５２は、縦筋１００の荷重に充分に耐え得る強度を有するものが選択される。そして、ＪＩＳシャックル（ＪＩＳ規格シャックル）（図２に示す）５７を介したワイヤー５２と吊り天秤１０６との連結が行われる。各部材の連結の順序は特に限定されない。各部材の連結の一例を以下に説明する。 Next, a wire 52 (fall prevention member, shown in FIG. 2) having an end ring 54 at one end and an end ring 56 at the other end is prepared. The wire 52 is selected to have a strength that can sufficiently withstand the load of the longitudinal bars 100. Then, the wire 52 and the suspension balance 106 are connected via a JIS shackle (JIS standard shackle) (shown in FIG. 2) 57. The order of connection of each member is not particularly limited. An example of the connection of each member will be described below.
雄螺子棒２２の二つの平坦面２０が挟持具（図示しない）で挟持されて、図４に示すように、雄螺子棒２２がカプラー４０の螺子孔５０に螺入されて連結される。そして、雄螺子棒２２にシャックル２４が取り付けられ、また、シャックル２４が市販のダブルシャックル４１に連結され、ダブルシャックル４１に市販のＪＩＳシャックル４３が連結され、ワイヤー５２がＪＩＳシャックル４３に連結される。ダブルシャックル４１は、図４に示すように、第一連結部材４５と、第一連結部材４５に対して回転中心Ｃ１のまわりに回転可能な第二連結部材４７とから構成されている。次に、ワイヤー５２の端部リング５６が、図２に示すように、ＪＩＳシャックル５７を介して吊り天秤１０６に連結される。このようにして鉄筋吊り下げ治具１２が形成される。すなわち、鉄筋吊り下げ治具１２は、鉄筋落下防止治具１０と、吊り天秤（保持体）１０６と、スリングベルト（吊り下げ部材）１０８と、ワイヤー（落下防止部材）５２と、を備えて構成される。なお、ダブルシャックル４１及びＪＩＳシャックル４３等を介して鉄筋落下防止治具１０を吊り天秤１０６に連結した後に、鉄筋落下防止治具１０の雄螺子棒２２をカプラー４０に連結して、鉄筋吊り下げ治具１２を形成することも可能である。また、ダブルシャックル４１、ＪＩＳシャックル４３、ＪＩＳシャックル５７は、ワイヤー５２の端部近傍の動きを円滑化できるものであるが、円滑化のためには、特にこれらに限定されるものではない。 The two flat surfaces 20 of the male screw rod 22 are clamped by a clamping tool (not shown), and the male screw rod 22 is screwed into the screw hole 50 of the coupler 40 and connected as shown in FIG. The shackle 24 is attached to the male screw rod 22, the shackle 24 is connected to a commercially available double shackle 41, a commercially available JIS shackle 43 is connected to the double shackle 41, and the wire 52 is connected to the JIS shackle 43. . As shown in FIG. 4, the double shackle 41 includes a first connecting member 45 and a second connecting member 47 that can rotate around the rotation center C <b> 1 with respect to the first connecting member 45. Next, the end ring 56 of the wire 52 is connected to the suspension balance 106 through a JIS shackle 57 as shown in FIG. In this way, the reinforcing bar hanging jig 12 is formed. That is, the reinforcing bar hanging jig 12 includes a reinforcing bar drop preventing jig 10, a hanging balance (holding body) 106, a sling belt (hanging member) 108, and a wire (falling prevention member) 52. Is done. The rebar drop prevention jig 10 is connected to the suspension balance 106 via the double shackle 41, the JIS shackle 43, etc., and then the male screw rod 22 of the rebar drop prevention jig 10 is connected to the coupler 40 to suspend the rebar. It is also possible to form the jig 12. Further, the double shackle 41, the JIS shackle 43, and the JIS shackle 57 can smooth the movement in the vicinity of the end portion of the wire 52. However, the smoothing is not particularly limited to these.
次に、ワイヤー４４（図２に示す）等を介して吊り天秤１０６に既に連結されているレッカーリング４８（図２に示す）が、レッカー装置（図示しない）が備えるフック１０４に連結される。レッカー装置により、レッカーリング４８及び吊り天秤１０６等が持ち上げられていき、図２に示すように、縦筋１００がスリングベルト１０８によって空中に保持されるまでレッカーリング４８及び吊り天秤１０６等が持ち上げられる。 Next, a wrecker ring 48 (shown in FIG. 2) that is already connected to the suspension balance 106 via a wire 44 (shown in FIG. 2) or the like is connected to a hook 104 provided in the wrecker device (not shown). The tow ring 48 and the suspension balance 106 are lifted by the wrecker device, and the tow ring 48 and the suspension balance 106 are lifted until the vertical bars 100 are held in the air by the sling belt 108 as shown in FIG. .
縦筋１００が空中に保持された時、図２に示すように、スリングベルト１０８に縦筋１００の重量が負荷され、スリングベルト１０８には張力が生じ、スリングベルト１０８は弛まないで垂下する。すなわち、縦筋１００の重量の全てがスリングベルト１０８に負荷される。この時、図２及び図４に示すように、シャックル２４が、回転中心から斜め上に延びる方向になるように、ワイヤー５２の長さが調節されている。 When the vertical bars 100 are held in the air, as shown in FIG. 2, the weight of the vertical bars 100 is applied to the sling belt 108, tension is generated in the sling belt 108, and the sling belt 108 hangs down without slacking. That is, all of the weight of the vertical bars 100 is loaded on the sling belt 108. At this time, as shown in FIGS. 2 and 4, the length of the wire 52 is adjusted so that the shackle 24 extends obliquely upward from the rotation center.
空中に保持された縦筋１００は、例えば、橋梁の橋脚を形成するために、既に基礎に固定されている複数段の横方向の帯筋（図示しない）に沿って配置されていく。縦筋１００が空中に保持されている時、もし、劣化によりスリングベルト１０８が切れ、又は、縦筋１００が衝撃を受けてアイ１１２のひばり結びが緩んで縦筋１００及びカプラー４０からスリングベルト１０８が離脱した場合、スリングベルト１０８による縦筋１００の保持はできなくなる。 The vertical bars 100 held in the air are arranged along a plurality of horizontal band bars (not shown) that are already fixed to the foundation, for example, to form bridge piers. When the vertical line 100 is held in the air, if the sling belt 108 is cut due to deterioration or the vertical line 100 is subjected to an impact and the tying of the eye 112 is loosened, the vertical line 100 and the coupler 40 are connected to the sling belt 108. When the detachment occurs, the vertical stripe 100 cannot be held by the sling belt 108.
この時、図６に示すように、縦筋１００、カプラー４０及び雄螺子棒２２が、降下し、シャックル２４が、雄螺子棒２２の降下に従ってボルト（回転軸）３８を回転中心として、図６における時計まわりに回転する。縦筋１００等が降下することにより、作業者はスリングベルト１０８が切れたこと等を目視で認識できる。その後に、シャックル２４の回転が停止した時、ワイヤー５２に、縦筋１００、カプラー４０、雄螺子棒２２及びシャックル２４等の荷重が負荷され、ワイヤー５２に張力が負荷される。ワイヤー５２に縦筋１００等の荷重が負荷されることにより、縦筋１００等の降下が停止する。すなわち、縦筋１００等がワイヤー５２によって空中に保持され、縦筋１００の落下を防止できる。また、スリングベルト１０８が縦筋１００を吊り下げているとき、シャックル２４は、回転中心から斜め上に延びる方向であり、スリングベルト１０８が切れた時等に、シャックル２４の回転量を少なくして縦筋１００等の降下する距離が極力少なくなるようにしている。このため、ワイヤー５２に縦筋１００等の荷重が負荷された瞬間の衝撃及び縦筋１００等からの反力を極力少なくでき、ワイヤー５２に縦筋１００等の荷重が負荷された瞬間に、縦筋１００等が大きく揺動することはなく、ワイヤー５２の弾性力によって縦筋１００等が跳ね上がったりすることもなく、安全性を向上させることができる。 At this time, as shown in FIG. 6, the vertical bars 100, the coupler 40, and the male screw rod 22 are lowered, and the shackle 24 is rotated around the bolt (rotating shaft) 38 as the rotation center of the male screw rod 22. Rotate clockwise at. The operator can visually recognize that the sling belt 108 has been cut or the like by dropping the vertical stripe 100 or the like. Thereafter, when the rotation of the shackle 24 is stopped, the wire 52 is loaded with loads such as the vertical bars 100, the coupler 40, the male screw rod 22 and the shackle 24, and the wire 52 is tensioned. When a load such as the vertical line 100 is applied to the wire 52, the descent of the vertical line 100 or the like stops. That is, the vertical bars 100 and the like are held in the air by the wires 52, and the vertical bars 100 can be prevented from falling. Further, when the sling belt 108 suspends the vertical stripe 100, the shackle 24 extends obliquely upward from the center of rotation. When the sling belt 108 is cut, the amount of rotation of the shackle 24 is reduced. The descending distance of the vertical line 100 or the like is minimized. For this reason, the impact at the moment when the load such as the vertical muscle 100 is applied to the wire 52 and the reaction force from the vertical muscle 100 can be reduced as much as possible. The muscles 100 and the like do not oscillate greatly, and the vertical muscles 100 and the like do not jump up due to the elastic force of the wire 52, so that safety can be improved.
本発明の鉄筋落下防止治具１０、鉄筋吊り下げ治具１２及び鉄筋落下防止方法によれば、スリングベルト１０８が切れた場合、又は、スリングベルト１０８が縦筋１００等から離脱した場合であっても、縦筋１００を吊り下げた状態を維持できる。これにより、帯筋への縦筋１００の配置作業の安全性を向上させることができる。また、本発明の鉄筋落下防止方法によれば、スリングベルト１０８が縦筋１００を保持して帯筋への縦筋１００の配置作業を行っている時には、ワイヤー５２に縦筋１００の荷重が負荷されない。このため、帯筋へ縦筋１００を配置するために縦筋１００を上下移動する時に、上下方向の衝撃がワイヤー５２に負荷されワイヤー５２の強度が低下しワイヤー５２が損傷することはない。これにより、スリングベルト１０８が切れた場合等には、ワイヤー５２によって確実に縦筋１００を保持できる。すなわち、ワイヤー５２は、縦筋１００の落下防止専用として機能する。 According to the reinforcing bar drop prevention jig 10, the reinforcing bar suspension jig 12, and the reinforcing bar drop prevention method of the present invention, when the sling belt 108 is cut or when the sling belt 108 is detached from the vertical bars 100 or the like. In addition, it is possible to maintain the state in which the vertical bars 100 are suspended. Thereby, the safety | security of the arrangement | positioning operation | work of the vertical muscle 100 to a band can be improved. Further, according to the method of preventing rebar dropping of the present invention, when the sling belt 108 holds the vertical bar 100 and performs the placement operation of the vertical bar 100 on the band, the load of the vertical bar 100 is applied to the wire 52. Not. For this reason, when the vertical streak 100 is moved up and down to place the vertical streak 100 on the band, the vertical impact is applied to the wire 52, the strength of the wire 52 is not lowered, and the wire 52 is not damaged. Thereby, when the sling belt 108 is cut or the like, the vertical stripe 100 can be reliably held by the wire 52. That is, the wire 52 functions exclusively for preventing the vertical stripe 100 from falling.
以上、本発明の実施形態について説明したが、本発明は、実施形態に記載したものに限定されることなく、特許請求の範囲に記載した事項の範囲でのさまざまな設計変更が可能である。例えば、本発明の鉄筋落下防止方法において、ワイヤー５２の代替としてチェーン又はスリングベルトを使用してもよい。 The embodiments of the present invention have been described above, but the present invention is not limited to those described in the embodiments, and various design changes can be made within the scope of the matters described in the claims. For example, in the reinforcing bar drop prevention method of the present invention, a chain or a sling belt may be used as an alternative to the wire 52.
１０ 鉄筋落下防止治具
１２ 鉄筋吊り下げ治具
１８ 雄螺子
２０ 平坦面
２２ 雄螺子棒
２４ シャックル（回転金具）
２８ 貫通孔
３０ 貫通孔
３２ 螺子孔
３４ 本体
３６ 雄螺子
３８ ボルト（回転軸）
４０ カプラー
５０ 螺子孔
５２ ワイヤー（落下防止部材）
５４ 端部リング
５６ 端部リング
１００ 縦筋（鉄筋）
１０６ 吊り天秤（保持体）
１０８ スリングベルト（吊り下げ部材）
10 Rebar Fall Prevention Jig 12 Rebar Suspension Jig 18 Male Screw 20 Flat Surface 22 Male Screw Rod 24 Shackle (Rotating Bracket)
28 Through hole 30 Through hole 32 Screw hole 34 Main body 36 Male screw 38 Bolt (rotating shaft)
40 Coupler 50 Screw hole 52 Wire (Fall prevention member)
54 End Ring 56 End Ring 100 Longitudinal (Rebar)
106 Hanging balance (holding body)
108 Sling belt (hanging member)
Claims (5)
棒状であり、一端側に、長手方向に対して垂直方向の貫通孔が設けられ、少なくとも他端側に、雄螺子が設けられた雄螺子棒と、
前記雄螺子棒の前記貫通孔に貫通される回転軸を有し、該回転軸を回転中心として回転する回転金具と、
を備え、
前記鉄筋の上端に螺合された雌螺子体に、前記雄螺子棒の他端側が螺入され、前記保持体に釣支される落下防止部材に、前記回転金具が連結されるように構成されたことを特徴とする鉄筋落下防止治具。 A rebar drop prevention jig that prevents the rebar from being dropped by a suspension member that is supported by a holding body held in the air,
A male screw rod having a rod-like shape, provided with a through hole in a direction perpendicular to the longitudinal direction on one end side, and provided with a male screw on at least the other end side;
A rotating metal fitting having a rotating shaft that passes through the through hole of the male screw rod, and rotating about the rotating shaft;
With
The male screw rod screwed into the upper end of the reinforcing bar is screwed into the other end of the male screw rod, and the rotary fitting is connected to a fall prevention member that is supported by the holding member. Reinforcing bar fall prevention jig characterized by that.
前記請求項１に記載する前記保持体と、
前記請求項１に記載する前記吊り下げ部材と、
前記請求項１に記載する前記落下防止部材と、
を備えた鉄筋吊り下げ治具。 The reinforcing bar drop prevention jig according to claim 1,
The holder according to claim 1;
The suspension member according to claim 1;
The fall prevention member according to claim 1;
Reinforcing bar suspension jig equipped with.
前記鉄筋の上端に螺合された雌螺子体に、前記鉄筋落下防止治具の前記雄螺子棒の他端側を螺入する工程と、
前記保持体に釣支される落下防止部材に、前記鉄筋落下防止治具の前記回転金具を連結する工程と、
を含むことを特徴とする鉄筋落下防止方法。 Using the reinforcing bar drop prevention jig according to claim 1, it is a reinforcing bar drop prevention method for preventing the fall of a reinforcing bar suspended by a suspension member that is supported by a holding body held in the air.
A step of screwing the other end side of the male screw rod of the reinforcing bar drop prevention jig into a female screw body screwed to the upper end of the reinforcing bar;
Connecting the rotary fitting of the reinforcing bar drop prevention jig to the fall prevention member supported by the holding body;
A method for preventing a reinforcing bar from falling.
5. The reinforcing bar drop prevention method according to claim 3, wherein when the suspension member suspends the reinforcing bar, the rotating metal fitting extends in an obliquely upward direction from the rotation center.
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| CN113404167A (en) * | 2021-06-25 | 2021-09-17 | 广东建科建设咨询有限公司 | Constructional column top steel bar steel structure embedded assembly and construction method |
| CN113404167B (en) * | 2021-06-25 | 2022-04-15 | 广东建科建设咨询有限公司 | Constructional column top steel bar steel structure embedded assembly and construction method |
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