JP7137974B2

JP7137974B2 - Threaded rebar anchor and method for connecting screw rebar using this rebar anchor

Info

Publication number: JP7137974B2
Application number: JP2018126926A
Authority: JP
Inventors: 直人山田; 浩萩原
Original assignee: JFE Bars and Shapes Corp
Current assignee: JFE Bars and Shapes Corp
Priority date: 2018-07-03
Filing date: 2018-07-03
Publication date: 2022-09-15
Anticipated expiration: 2038-07-03
Also published as: JP2020007725A

Description

本発明は、鉄筋コンクリート構造（ＲＣ構造）の建築物における鉄筋どうしの接続部に用いられる充填材含浸テープジョイント、および、充填材含浸テープジョイントを用いた鉄筋どうしの接続方法に関する。 The present invention relates to a filler-impregnated tape joint used for connecting reinforcing bars in a reinforced concrete structure (RC structure) building, and a method for connecting reinforcing bars using the filler-impregnated tape joint.

ＲＣ構造の建築物においては、柱や梁に埋設する鉄筋を接続する際に、接続する二本の鉄筋の端部を筒形状の受け部材の内部に挿入し、鉄筋と受け部材との隙間にモルタルを充填して鉄筋どうしを固着させる技術がある。従来からそのような鉄筋の接続作業を効率化する技術が提案されており、例えば、特許文献１に示された技術もその一つである。 In RC structures, when connecting reinforcing bars embedded in columns and beams, the ends of the two reinforcing bars to be connected are inserted into the cylindrical receiving member, and the gap between the reinforcing bar and the receiving member is inserted. There is a technique to fill the mortar and fix the reinforcing bars together. Conventionally, techniques for improving the efficiency of such reinforcing bar connection work have been proposed, and for example, the technique disclosed in Patent Literature 1 is one of them.

特許文献１に記載された技術は、受け部材に挿入する鉄筋を容易に仮固定するために、鉄筋に係合する金具を受け部材の内部に予め設けておくものである。この金具は、バネ弾性の強い鋼材などで形成され、鉄筋を周方向に取り囲む帯状の基片と、この基片から鉄筋の長手方向に沿って突出する短舌片と長舌片とを備えている。 The technique described in Patent Literature 1 preliminarily provides metal fittings that engage with the reinforcing bars inside the receiving member in order to easily temporarily fix the reinforcing bars to be inserted into the receiving member. This metal fitting is formed of a steel material with high spring elasticity, and has a strip-shaped base piece that surrounds the reinforcing bar in the circumferential direction, and a short tongue piece and a long tongue piece that protrude from the base piece along the longitudinal direction of the reinforcing bar. .

このうち短舌片は、受け部材の内面に係合して、当該金具を受け部材に固定するものである。一方の長舌片は、挿入される鉄筋の外表面に周方向に沿った複数の個所で係合し、鉄筋の抜け出しを防止する。つまり、受け部材の内部に予め設置した略環状の金具に鉄筋を挿入することで、長舌片が鉄筋の外面に噛み込み、戻り防止の機能を発揮して、鉄筋の位置を固定する。鉄筋が受け部材に固定されたのち、受け部材の側面に設けた孔部からモルタルが充填され、鉄筋の本固定が行われる。 Among these, the short tongue is engaged with the inner surface of the receiving member to fix the metal fitting to the receiving member. One of the long tongue pieces engages the outer surface of the inserted reinforcing bar at a plurality of points along the circumferential direction to prevent the reinforcing bar from slipping out. That is, by inserting the reinforcing bar into a substantially ring-shaped metal fitting previously installed inside the receiving member, the long tongue piece bites into the outer surface of the reinforcing bar, exerting a return prevention function to fix the position of the reinforcing bar. After the reinforcing bar is fixed to the receiving member, mortar is filled from the hole provided in the side surface of the receiving member to permanently fix the reinforcing bar.

このような金具を用いることで、鉄筋を受け部材の定位置に素早く配置することができ、鉄筋接続作業の効率が向上するとのことである。 By using such metal fittings, it is possible to quickly arrange the reinforcing bars at fixed positions on the receiving member, thereby improving the efficiency of connecting the reinforcing bars.

特開平１０-６１１０６号公報JP-A-10-61106

しかし、上記従来の方法では、受け部材の側面に設けた孔部から受け部材の内部にモルタルを充填する必要があるなど、鉄筋の接続作業は未だ煩雑なままである。また、受け部材の内部に形状保持性の高い金具が存在することで、モルタルが鉄筋あるいは受け部材の内面と接触せず、モルタルの接着効果が損なわれる可能性もある。 However, in the above-described conventional method, the work of connecting reinforcing bars is still complicated, such as the need to fill the inside of the receiving member with mortar through the hole provided in the side surface of the receiving member. In addition, there is a possibility that the mortar will not come into contact with the reinforcing bars or the inner surface of the receiving member due to the presence of metal fittings that are highly shape-retaining inside the receiving member, thereby impairing the adhesion effect of the mortar.

このような実情に鑑み、従来から、より作業効率の高い鉄筋と受け部材との充填材を用いた接続技術が求められている。 In view of such circumstances, conventionally, there has been a demand for a technique for connecting a reinforcing bar and a receiving member using a filler with higher work efficiency.

（特徴構成）
本発明に係るネジ鉄筋固定材は、充填材を第１保護層および第２保護層で被覆しつつシート状に形成し、前記第１保護層あるいは前記第２保護層の外面に粘着層を備え、当該粘着層のさらに外面に前記粘着層の利用に際して取り外す第３保護層が備えられた点に特徴を有する。 (characteristic configuration)
The screw reinforcing bar fixing material according to the present invention is formed in a sheet shape while covering the filler with a first protective layer and a second protective layer, and has an adhesive layer on the outer surface of the first protective layer or the second protective layer. , the adhesive layer is further provided with a third protective layer on the outer surface thereof to be removed when the adhesive layer is used.

（効果）
本構成のネジ鉄筋固定材は、例えば、鉄筋コンクリート構造物の柱や梁に配設するネジ鉄筋を樹脂モルタルなどの充填材を用いて接続する箇所に用いることができる。ネジ鉄筋の接続に際しては、例えば、互いに接続する二本のネジ鉄筋を一つの受け部材の内部に挿入し、ネジ鉄筋と受け部材との隙間に充填材を満たす必要がある。そのために、本構成のネジ鉄筋固定材をネジ鉄筋の端部に巻き付けるなど仮固定し、これらを受け部材の内部に挿入することで、充填材の充填作業が容易になる。 (effect)
The threaded reinforcing bar fixing material of this configuration can be used, for example, at a location where threaded reinforcing bars arranged on columns and beams of a reinforced concrete structure are connected using a filler such as resin mortar. When connecting screw reinforcing bars, for example, it is necessary to insert two mutually connected screw reinforcing bars into one receiving member and fill the gap between the screw reinforcing bars and the receiving member with a filler. For this reason, the threaded reinforcing bar fixing material of this configuration is temporarily fixed by, for example, being wound around the end of the threaded reinforcing bar, and inserted into the receiving member, thereby facilitating the filling operation of the filling material.

また、充填材はシート状に伸ばされ、第１保護層と第２保護層とで被覆されているため、例えば、ネジ鉄筋が受け部材の内部に挿入されて第１保護層あるいは第２保護層が破損するまでは外部の空気との接触が遮断される。よって、ネジ鉄筋の接続作業に至るまでのあいだネジ鉄筋固定材の保存が可能となり、ネジ鉄筋接続の作業性を向上させることができる。
さらに、本構成のように粘着層を備えることで、充填材の充填作業を行う対象物にネジ鉄筋固定材を予め貼り付けておくことができる。よって、ネジ鉄筋など接続作業を行う対象物の姿勢が任意となり、充填材の配設作業がさらに容易なものとなる。 In addition, since the filler material is stretched into a sheet and covered with the first protective layer and the second protective layer, for example, the screw reinforcing bar is inserted into the receiving member and the first protective layer or the second protective layer is applied. is cut off from contact with the outside air until it breaks. Therefore, it is possible to store the screw reinforcing bar fixing material until the connection work of the screw reinforcing bar is performed, and the workability of connecting the screw reinforcing bar can be improved.
Furthermore, by providing the adhesive layer as in this configuration, the screw reinforcing bar fixing material can be attached in advance to the object to be filled with the filler. Therefore, the posture of the object to be connected, such as a screw reinforcing bar, can be arbitrarily set, and the work of arranging the filling material is further facilitated.

（特徴構成）
本発明に係るネジ鉄筋固定材にあっては、前記充填材を、互いに仕切層で分離された主剤および硬化剤とすることができる。 (characteristic configuration)
In the screw reinforcing bar fixing material according to the present invention, the filler can be a main agent and a hardening agent separated from each other by a partition layer.

（効果）
本構成では、充填材を主剤と硬化剤との二成分を備えて構成し、主剤と硬化剤とを仕切層で分離してある。さらに、主剤および硬化剤は、夫々、第１保護層と第２保護層とによって外部から遮断されている。ネジ鉄筋は所定の重量を有するから、ネジ鉄筋を受け部材に挿入する際にはネジ鉄筋と受け部材とが強く当接する。これによってネジ鉄筋固定材が破け、主剤と硬化剤とが効率よく混合される。 (effect)
In this configuration, the filler is composed of two components, a main agent and a curing agent, and the main agent and the curing agent are separated by a partition layer. Furthermore, the main agent and the curing agent are shielded from the outside by the first protective layer and the second protective layer, respectively. Since the threaded reinforcing bar has a predetermined weight, the threaded reinforcing bar and the receiving member strongly abut each other when the threaded reinforcing bar is inserted into the receiving member. As a result, the screw reinforcing bar fixing material is broken, and the main agent and the hardening agent are efficiently mixed.

このように、本構成のネジ鉄筋固定材は、互いに接続する例えばネジ鉄筋と受け部材との間に二液性の充填材を簡単に配置し、効率的に混合することができる。例えばネジ鉄筋の接続箇所など、ネジ鉄筋の配置方向が様々で、また、高所での接続が必要になるなど作業者の手が届き難い場所での接続作業が極めて容易となる。 Thus, the screw reinforcing bar fixing material of this configuration allows the two-part filling material to be easily placed and efficiently mixed between, for example, the screw reinforcing bar and the receiving member that are connected to each other. For example, it is extremely easy to perform connection work in places where the screwed reinforcing bars are arranged in various directions, and connections are required at high places, which are difficult for workers to reach.

さらに、充填材を二成分で構成すると、充填材の硬化開始時期をより正確に設定できるうえ、ネジ鉄筋固定材の長期保存も可能となり、ネジ鉄筋の接続作業の効率をさらに高めることができる。 Furthermore, if the filling material is composed of two components, it is possible to set the curing start time of the filling material more accurately, and it is also possible to store the screw reinforcing bar fixing material for a long time, and the efficiency of connecting screw reinforcing bars can be further improved.

（削除） (delete)

（特徴構成）
本発明に係るネジ鉄筋固定材にあっては、前記第１保護層および前記第２保護層の夫々の平面に沿う方向において引張強度が最小となる方向として、前記第１保護層が第１方向を有し、前記第２保護層が第２方向を有し、前記平面に垂直な方向視において、前記第１方向と前記第２方向とのなす角度が予め設定した角度以内であると好適である。 (characteristic configuration)
In the screw reinforcing bar fixing material according to the present invention, the direction along the plane of each of the first protective layer and the second protective layer is the direction in which the tensile strength is minimized. and the second protective layer has a second direction, and the angle formed by the first direction and the second direction is within a preset angle when viewed in a direction perpendicular to the plane. be.

（効果）
本構成では、第１保護層および第２保護層の夫々につき、引張強度が最小となる方向を近い方向に揃えてある。これにより、例えば、ネジ鉄筋および受け部材のうちネジ鉄筋固定材を取り付けた一方の部材を他方の部材に当接する場合に、最小の引張強度となる方向を部材どうしの当接方向に近付けておくことで二つの層が同時に破れ易くなる。このため主剤と硬化剤とを確実に混合することができる。 (effect)
In this configuration, the direction in which the tensile strength is minimized is arranged in the near direction for each of the first protective layer and the second protective layer. As a result, for example, when one of the threaded reinforcing bar and the receiving member, to which the threaded reinforcing bar fixing material is attached, is brought into contact with the other member, the direction of the minimum tensile strength is brought close to the contact direction of the members. This makes it easier for the two layers to tear at the same time. Therefore, the main agent and the curing agent can be reliably mixed.

（特徴手段）
本発明に係るネジ鉄筋の接続方法にあっては、表面に雄ネジ部を有するネジ鉄筋の端部を、前記雄ネジ部と螺合する雌ネジ部を備えた受け部材に挿入して前記ネジ鉄筋と前記受け部材とを接続する際に、充填材が第１保護層および第２保護層で被覆されつつシート状に形成され、前記第１保護層あるいは前記第２保護層の外面に粘着層および第３保護層を備えた鉄筋固定材を、前記第３保護層を取り外したのち前記ネジ鉄筋の外面に巻き付け、
前記ネジ鉄筋を前記受け部材に螺合させつつ前記第１保護層および前記第２保護層を破断させて前記充填材を硬化させる点に特徴を有する。 (characteristic means)
In the method for connecting threaded reinforcing bars according to the present invention, an end portion of a threaded reinforcing bar having a male threaded portion on its surface is inserted into a receiving member provided with a female threaded portion to be screwed with the male threaded portion, and the screw is inserted into the receiving member. When connecting the reinforcing bar and the receiving member, the filler is formed into a sheet while being covered with the first protective layer and the second protective layer, and the adhesive layer is formed on the outer surface of the first protective layer or the second protective layer. and a reinforcing bar fixing material provided with a third protective layer, after removing the third protective layer, winding it around the outer surface of the screw reinforcing bar,
It is characterized in that the filler is hardened by breaking the first protective layer and the second protective layer while screwing the screw reinforcing bar into the receiving member.

（効果）
本方法であれば、ネジ鉄筋あるいは受け部材にネジ鉄筋固定材を巻き付けるなど仮固定した状態で両者を接続するから、ネジ鉄筋と受け部材との隙間に対する充填材の充填作業が極めて容易となる。また、充填材は保護層で被覆されているため、例えば、ネジ鉄筋が受け部材の内部に挿入されて保護層が破損するまでは外部の空気との接触が遮断される。よって、ネジ鉄筋の接続作業に至るまでのあいだネジ鉄筋固定材の保存が可能となり、鉄筋接続の作業性を向上させることができる。
また、ネジ鉄筋と受け部材とを互いに羅合するものであれば、ネジ鉄筋の雄ネジ部と受け部材の雌ネジ部との摺動距離が長くなるため、ネジ鉄筋固定材が確実に破断して主剤と硬化剤との混合度合いが高まる。さらに、雄ネジ部と雌ネジ部との間にはほぼ一定形状の隙間が螺旋状に形成されるから、ネジ鉄筋固定材が当該隙間に沿って移動し易い。このため、雄ネジ部と雌ネジ部との螺合領域の全長に亘って充填材を確実に充填することができ、強度の高い接続部を得ることができる。
さらに、本方法のように粘着層を備えることで、充填材の充填作業を行う対象物にネジ鉄筋固定材を予め貼り付けておくことができる。よって、ネジ鉄筋など接続作業を行う対象物の姿勢が任意となり、充填材の配設作業がさらに容易なものとなる。 (effect)
According to this method, the threaded reinforcing bars or the receiving member are temporarily fixed by winding the threaded reinforcing material around them, and then they are connected. Therefore, it is extremely easy to fill the gap between the threaded reinforcing bars and the receiving member with the filling material. In addition, since the filler is covered with the protective layer, contact with the outside air is blocked until the protective layer is damaged, for example, when the screw reinforcing bar is inserted into the receiving member. Therefore, it is possible to store the screw reinforcing bar fixing material until the connection work of the screw reinforcing bar is performed, and the workability of connecting the reinforcing bar can be improved.
In addition, if the threaded reinforcing bar and the receiving member are interlaced with each other, the sliding distance between the male threaded portion of the threaded reinforcing bar and the female threaded portion of the receiving member increases, so the threaded reinforcing bar fixing material is reliably broken. As a result, the degree of mixing between the main agent and the curing agent increases. Furthermore, since a substantially constant-shaped gap is formed spirally between the male screw portion and the female screw portion, the screw reinforcing bar fixing member can easily move along the gap. Therefore, it is possible to reliably fill the filler over the entire length of the threaded region between the male threaded portion and the female threaded portion, thereby obtaining a high-strength connection portion.
Furthermore, by providing the adhesive layer as in this method, the screw reinforcing bar fixing material can be attached in advance to the object to be filled with the filler. Therefore, the posture of the object to be connected, such as a screw reinforcing bar, can be arbitrarily set, and the work of arranging the filling material is further facilitated.

（特徴手段）
本発明に係るネジ鉄筋の接続方法にあっては、前記充填材が、主剤および硬化剤を有すると共に、前記主剤および前記硬化剤が仕切層によって分離されつつ層状に重ねられ、前記主剤が前記第１保護層で被覆され、前記硬化剤が前記第２保護層で被覆されたものであり、前記ネジ鉄筋を前記受け部材に螺合させることで、前記第１保護層および前記第２保護層および前記仕切層を破断させて前記主剤と前記硬化剤とを混合して硬化させることも可能である。 (characteristic means)
In the method for connecting threaded reinforcing bars according to the present invention, the filler includes a main agent and a hardening agent, and the main agent and the hardening agent are separated by a partition layer and stacked in layers, and the main agent and the hardening agent are separated by a partition layer. 1 protective layer, the curing agent is coated with the second protective layer, and by screwing the threaded reinforcing bar into the receiving member , the first protective layer and the second protective layer and It is also possible to break the partition layer and mix and cure the main agent and the curing agent.

（効果）
本方法であれば、ネジ鉄筋の接続作業を行うまでは、主剤と硬化剤とを分離した状態に維持できるためネジ鉄筋固定材の長期保存が可能となり、ネジ鉄筋固定材の取扱性が向上する。また、主剤と硬化剤とを分離状態に保護する第１保護層などはネジ鉄筋と受け部材との当接によって破断するから、主剤と硬化剤との混合作業も容易である。 (effect)
With this method, the main compound and hardening agent can be kept separate until the threaded rebar is connected, so the threaded rebar fixing material can be stored for a long period of time, and the handleability of the threaded rebar fixing material is improved. . In addition, since the first protective layer or the like that protects the main compound and the hardening agent in a separated state breaks when the screw reinforcing bar and the receiving member come into contact with each other, the main compound and the hardening agent can be easily mixed.

（削除） (delete)

第１実施形態に係る鉄筋固定材および鉄筋の接続態様を示す説明図Explanatory drawing showing the connection mode of the reinforcing bar fixing material and the reinforcing bar according to the first embodiment. 第１実施形態に係る鉄筋固定材の構成を示す説明図Explanatory drawing showing the configuration of the reinforcing bar fixing material according to the first embodiment 第１実施形態に係る鉄筋の接続態様を示す斜視図The perspective view which shows the connection aspect of the reinforcing bar which concerns on 1st Embodiment. 第１実施形態に係る鉄筋の接続部を示す断面図Sectional drawing which shows the connection part of the reinforcing bar which concerns on 1st Embodiment 第２実施形態に係る鉄筋固定材の構成を示す説明図Explanatory drawing showing the configuration of the reinforcing bar fixing material according to the second embodiment 第３実施形態に鉄筋固定材を示す説明図Explanatory drawing showing a reinforcing bar fixing material in the third embodiment 第４実施形態に係る鉄筋の接続態様を示す説明図Explanatory drawing showing a connection mode of reinforcing bars according to the fourth embodiment 第５実施形態に係る鉄筋の接続態様を示す説明図Explanatory drawing showing a connection mode of reinforcing bars according to the fifth embodiment 第６実施形態に係る鉄筋固定材の巻き付け態様を示す説明図Explanatory drawing showing the winding mode of the reinforcing bar fixing material according to the sixth embodiment.

〔第１実施形態〕
（概要）
本発明に係る鉄筋固定材３および当該鉄筋固定材３を用いた鉄筋１ａの接続方法につき、図面を参照しながら説明する。図１には、受け部材２に対し、ネジ鉄筋１の端部どうしを接続する例を示す。実際のＲＣ構造物における柱や梁には、この図で示すネジ鉄筋１の複数本が埋設される。よって、ネジ鉄筋１の設置姿勢は、図１のように水平方向に限らず任意である。また、二本の別のネジ鉄筋１どうしを接続することもあれば、環状に成形した一本のネジ鉄筋１の端部どうしを接続することもある。 [First Embodiment]
(Overview)
A reinforcing bar fixing member 3 according to the present invention and a method for connecting reinforcing bars 1a using the reinforcing bar fixing member 3 will be described with reference to the drawings. FIG. 1 shows an example of connecting ends of a screw reinforcing bar 1 to a receiving member 2 . A plurality of threaded reinforcing bars 1 shown in this figure are embedded in columns and beams in an actual RC structure. Therefore, the installation attitude|position of the screw reinforcement 1 is not restricted to a horizontal direction like FIG. 1, but is arbitrary. Alternatively, two separate screw reinforcing bars 1 may be connected together, or the ends of a single annularly shaped screw reinforcing bar 1 may be connected together.

本実施形態においては、受け部材２の孔部２２に形成された雌ネジ部２１に、ネジ鉄筋１の表面に形成された雄ネジ部１１が螺合される。その際、図１に示すように、ネジ鉄筋１の端部に充填材Ｊを保持したシート状の鉄筋固定材３を巻き付ける。雄ネジ部１１と雌ネジ部２１との間には一定形状の隙間が螺旋状に形成されるから、ネジ鉄筋１を雌ネジ部２１に螺合する際には、鉄筋固定材３が当該隙間に沿って移動し易い。よって、雄ネジ部１１と雌ネジ部２１との螺合領域の全長に亘って充填材Ｊを確実に充填することができ、強度の高い接続部を得ることができる。 In this embodiment, the male threaded portion 11 formed on the surface of the threaded reinforcing bar 1 is screwed into the female threaded portion 21 formed in the hole portion 22 of the receiving member 2 . At that time, as shown in FIG. Since a gap of a certain shape is formed in a spiral between the male threaded portion 11 and the female threaded portion 21, when the threaded reinforcing bar 1 is screwed into the female threaded portion 21, the reinforcing bar fixing material 3 is placed in the gap. Easy to move along. Therefore, it is possible to reliably fill the filler J over the entire length of the threaded region between the male threaded portion 11 and the female threaded portion 21, thereby obtaining a high-strength connecting portion.

（充填材）
図２（ａ）には、鉄筋固定材３の構成を示す。この鉄筋固定材３は一液タイプの充填材Ｊを備えている。充填材Ｊは、二枚の保護層で被覆され、全体がシート状に形成されている。具体的には、一方の第１保護層３１の表面に例えば流動性のある充填材Ｊが薄く塗布される。その上からもう一方の第２保護層３２を被せ、充填材Ｊの周囲に沿って例えば熱融着や粘着によって第１保護層３１と第２保護層３２を張り合わせ、図２（ｂ）に示すように封止部３５を形成する。これにより、充填材Ｊが密封された鉄筋固定材３が得られる。 (filler)
FIG. 2(a) shows the configuration of the reinforcing bar fixing member 3. As shown in FIG. This reinforcing bar fixing material 3 is provided with a one-liquid type filler J. As shown in FIG. The filler J is covered with two protective layers and formed into a sheet as a whole. Specifically, the surface of one of the first protective layers 31 is thinly coated with, for example, a filler J having fluidity. The other second protective layer 32 is covered from above, and the first protective layer 31 and the second protective layer 32 are laminated along the periphery of the filler J by, for example, heat sealing or adhesion, as shown in FIG. 2(b). A sealing portion 35 is formed as follows. As a result, the reinforcing bar fixing member 3 with the filler J sealed is obtained.

用いる充填材Ｊとしては、例えば、一液性の無機グラウト材がある。このような無機グラウト材としては、例えば、ＪＦＥ条鋼製の「ネジグラウトタイプＭ３」がある。このグラウト材は、例えば、粉末状のグラウト材と水とを５０：１２の質量比に混合して生成される。このグラウト材は、空気と触れることで次第に硬化する。よって、混合作業が終了し、流動性を有している状態で、グラウト材を第１保護層３１に塗布し、さらに、第２保護層３２で被覆して鉄筋固定材３を形成する。 As the filler J to be used, for example, there is a one-liquid inorganic grout material. As such an inorganic grout material, there is, for example, "Screw Grout Type M3" manufactured by JFE Bar Steel. This grout material is produced, for example, by mixing a powdery grout material and water in a mass ratio of 50:12. This grout material gradually hardens on exposure to air. Therefore, the grout material is applied to the first protective layer 31 in a fluid state after the mixing operation is completed, and then covered with the second protective layer 32 to form the reinforcing bar fixing material 3 .

（保護層）
第１保護層３１および第２保護層３２は、充填材Ｊの硬化を遅延させるために気密性を有すると共に、ネジ鉄筋１の螺合時には容易に破断する必要がある。これら両方の特性は相反するものであるが、特に破断の容易性を考慮することで好適な鉄筋固定材３を得ることができる。 (protective layer)
The first protective layer 31 and the second protective layer 32 need to be airtight in order to delay hardening of the filler J, and to be broken easily when the screw reinforcing bar 1 is screwed. Although both of these properties are contradictory, a suitable reinforcing bar fixing material 3 can be obtained by considering especially the ease of breakage.

例えば破断容易な樹脂膜を形成するには、特定方向の引張強さを下げることが考えられる。そのような第１の材料としては、アイオノマー樹脂を押し出し製造する際に、長手方向に延伸を加えて製造したフィルムがある。このような延伸によって炭化水素鎖が延伸方向に配向する一方で、幅方向には結合力の弱い金属イオンによる結合が生じる。この結果、幅方向に裂けやすいフィルムになる。 For example, in order to form a resin film that is easily broken, it is conceivable to lower the tensile strength in a specific direction. As such a first material, there is a film produced by stretching the ionomer resin in the longitudinal direction during extrusion production. Such stretching causes the hydrocarbon chains to be oriented in the stretching direction, while the bonds of metal ions having weak bonding strength are generated in the width direction. As a result, the film tends to tear in the width direction.

第２の材料は、低分子量の高密度ポリエチレンを低速で押し出し、幅方向の膨張度を高めつつ膨らませるインフレーションを行なうことで、幅方向に延伸を加えたフィルムである。こうして得られたフィルムは幅方向に破断し易くなる。 The second material is a film stretched in the width direction by extruding low-molecular-weight, high-density polyethylene at a low speed and expanding it while increasing the degree of expansion in the width direction. The film thus obtained is easily broken in the width direction.

第３の材料は、例えばメルトマスフローレート（ＭＦＲ）が１０以上の高密度ポリエチレンがある。これによるフィルムは脆くなり裂け易くなる。因みに、ＭＦＲは、シリンダーの中に樹脂を入れ、１９０℃に加熱した状態で２．１６ｋｇの荷重を掛けたとき、細孔から１０分間に流出する樹脂の重さ（ｇ）を意味する。 The third material is, for example, high density polyethylene with a melt mass flow rate (MFR) of 10 or greater. The resulting film becomes brittle and prone to tearing. By the way, MFR means the weight (g) of the resin that flows out from the pores in 10 minutes when the resin is placed in a cylinder and heated to 190° C. and a load of 2.16 kg is applied.

本実施形態の鉄筋固定材３にあっては、第１保護層３１および第２保護層３２は、例えば、自身の平面に沿う非平行な二つの方向において異なる引張強度を備えている。第１保護層３１および第２保護層３２の夫々において、最小の引張強度が得られる方向を鉄筋固定材３の一辺と平行なＸ方向に一致させる。 In the reinforcing bar fixing material 3 of this embodiment, the first protective layer 31 and the second protective layer 32 have, for example, different tensile strengths in two non-parallel directions along their planes. In each of the first protective layer 31 and the second protective layer 32 , the direction in which the minimum tensile strength is obtained is aligned with the X direction parallel to one side of the reinforcing bar fixing member 3 .

ただし、図２（ｂ）に示すように、第１保護層３１における最小引張強度方向Ｘ１と、第２保護層３２における最小引張強度方向Ｘ２とは、厳密に一致する必要はない。互いの方向の角度差が予め設定した許容角度α以内であれば、第１保護層３１と第２保護層３２とは実質的に同時に破断することとなる。因みに、当該許容角度αは、例えば１５度である。 However, as shown in FIG. 2(b), the minimum tensile strength direction X1 in the first protective layer 31 and the minimum tensile strength direction X2 in the second protective layer 32 need not exactly match. If the angular difference between the directions is within the preset allowable angle α, the first protective layer 31 and the second protective layer 32 will break substantially at the same time. Incidentally, the permissible angle α is, for example, 15 degrees.

これらの最小引張強度方向Ｘ１およびＸ２は、例えば、鉄筋固定材３をネジ鉄筋１に巻き付ける際に、ネジ鉄筋１の雄ネジ部１１のネジ溝の延出方向に対して交差する方向に設定しておく。そうすることで、ネジ鉄筋１を回転させる際に、鉄筋固定材３は双方のネジ溝の隙間の形状に沿うように変形して最小引張強度方向Ｘ１およびＸ２に引き伸ばされ、鉄筋固定材３の破断が促進されて、充填材Ｊが素早く放出される。 These minimum tensile strength directions X1 and X2 are set, for example, in a direction that intersects the extending direction of the thread groove of the male screw portion 11 of the threaded reinforcing bar 1 when the reinforcing bar fixing material 3 is wound around the threaded reinforcing bar 1. Keep By doing so, when the threaded reinforcing bar 1 is rotated, the reinforcing bar fixing member 3 is deformed along the shape of the gap between the two screw grooves and stretched in the minimum tensile strength directions X1 and X2. Fracture is accelerated and the filler J is quickly released.

このような材料を用いて形成する保護層の厚みは、例えば、数十ミクロンである。これに充填材Ｊを含めて全体の厚みは０．５ｍｍ程度かそれよりも薄く形成される。尚、後述する粘着層Ｎが付加される場合には、さらに数十ミクロンの厚みが付加される。 The thickness of the protective layer formed using such materials is, for example, several tens of microns. The total thickness including the filler J is formed to be about 0.5 mm or thinner. When an adhesive layer N, which will be described later, is added, a thickness of several tens of microns is added.

（粘着層）
第１保護層３１あるいは第２保護層３２の表面には粘着層Ｎを設けておくと便利である。その場合、粘着層Ｎの表面は、鉄筋固定材３の使用に際して取り外し可能な第３保護層３３で被覆しておく。粘着層Ｎを備えることで、鉄筋固定材３を例えばネジ鉄筋１や受け部材２の表面に仮止めすることができ、ネジ鉄筋１の姿勢が任意となり、充填材Ｊの配設作業が容易となる。 (adhesive layer)
It is convenient to provide an adhesive layer N on the surface of the first protective layer 31 or the second protective layer 32 . In that case, the surface of the adhesive layer N is covered with a removable third protective layer 33 when the reinforcing bar fixing material 3 is used. By providing the adhesive layer N, the reinforcing bar fixing material 3 can be temporarily fixed, for example, to the surface of the screw reinforcing bar 1 or the receiving member 2, and the posture of the screw reinforcing bar 1 can be arbitrary, and the work of disposing the filler J is facilitated. Become.

（施工方法）
図１に示すように、鉄筋固定材３は、通常は、ネジ鉄筋１の周囲に一層巻き付ける。鉄筋固定材３を巻き付けたとき、鉄筋固定材３の端部どうしが互いに届かずネジ鉄筋１の表面が見える場合には、充填材Ｊがネジ鉄筋１の全周に配設されず、所期の接続強度が得られない場合がある。一方、鉄筋固定材３が多層に重なる状態に巻き付けられた場合には、ネジ鉄筋１を受け部材２に螺合する際に鉄筋固定材３の一部が受け部材２の外部に取り残されるおそれがある。鉄筋固定材３は、ちょうど一層だけ巻き付けるのが理想であるが、その場合には充填材Ｊの総量が規定される。よって、接続するネジ鉄筋１と受け部材２との隙間寸法などを勘案して鉄筋固定材３に保持させる充填材Ｊの分量を調節するのが望ましい。 (Construction method)
As shown in FIG. 1 , the reinforcing bar fixing material 3 is usually wrapped around the screw reinforcing bar 1 in one layer. When the reinforcing bar fixing material 3 is wound, if the ends of the reinforcing bar fixing material 3 do not reach each other and the surface of the screw reinforcing bar 1 is visible, the filler J is not arranged around the entire circumference of the screw reinforcing bar 1, and the desired connection strength may not be obtained. On the other hand, if the reinforcing bar fixing material 3 is wound in multiple layers, part of the reinforcing bar fixing material 3 may be left outside the receiving member 2 when the screw reinforcing bar 1 is screwed into the receiving member 2 . be. Ideally, the reinforcing bar fixing material 3 should be wound in just one layer. In that case, the total amount of the filler J is defined. Therefore, it is desirable to adjust the amount of the filler J held by the reinforcing bar fixing member 3 in consideration of the size of the gap between the screw reinforcing bar 1 and the receiving member 2 to be connected.

鉄筋固定材３の寸法のうち、ネジ鉄筋１の長手方向に沿う寸法は、ネジ鉄筋１が受け部材２の内部に挿入される長さか、それよりも少し長めに設定しておく。これにより、適量の充填材Ｊが両者の隙間に充填される。尚、充填材Ｊの硬化に際して充填材Ｊの膨張率が大きい場合には、ネジ鉄筋１の長手方向に沿う鉄筋固定材３の長さはネジ鉄筋１の挿入長さよりも短くてよい。また、図１に示すように、ネジ鉄筋１の表面に巻き付けた鉄筋固定材３の端部のうちネジ鉄筋１の端部から遠い側の端部３ａの位置を、ネジ鉄筋１の表面に付した挿入深さを示すマーク１２に合わせておくとネジ鉄筋１の挿入深さが正確となる。 Of the dimensions of the reinforcing bar fixing member 3, the dimension along the longitudinal direction of the screw reinforcing bar 1 is set to a length that allows the screw reinforcing bar 1 to be inserted into the receiving member 2 or slightly longer than that. As a result, an appropriate amount of filler J is filled in the gap between the two. If the expansion coefficient of the filler J is large when the filler J hardens, the length of the reinforcing bar fixing member 3 along the longitudinal direction of the screw reinforcing bar 1 may be shorter than the insertion length of the screw reinforcing bar 1 . Also, as shown in FIG. The insertion depth of the screw reinforcing bar 1 becomes accurate by aligning it with the mark 12 indicating the insertion depth.

図３に示すように鉄筋固定材３を巻き付けたネジ鉄筋１は、受け部材２に羅合させる。既に一方のネジ鉄筋１が所定位置に設置されている場合には、当該ネジ鉄筋１に対して受け部材２を羅合させ、さらに別のネジ鉄筋１を螺合させる。図４は、二本のネジ鉄筋１の接続が終了した状態である。 As shown in FIG. 3 , the threaded reinforcing bar 1 around which the reinforcing bar fixing material 3 is wound is fitted to the receiving member 2 . When one of the screw reinforcing bars 1 is already installed at a predetermined position, the receiving member 2 is engaged with the screw reinforcing bar 1, and another screw reinforcing bar 1 is screwed. FIG. 4 shows a state in which the two screw reinforcing bars 1 have been connected.

（通気孔）
本実施形態の場合、充填材Ｊはネジ鉄筋１の螺合と同時に受け部材２の内部に充填される。よって、従来の受け部材２のように、ネジ鉄筋１を螺合させた後に充填材Ｊを注入する充填孔を受け部材２の側面に設ける必要はない。ただし、受け部材２の内部の空気を排出する通気孔２３を設けておくのが好ましい。即ち、本実施形態の場合、ネジ鉄筋１を受け部材２に螺合させ始めると直ちに雄ネジ部１１と雌ネジ部２１との隙間が鉄筋固定材３で密封され、受け部材２の内部の空間が閉じた空間となる。その場合、ネジ鉄筋１の螺合に伴って受け部材２の内部の圧力が高まり、充填材Ｊが押し戻される可能性がある。 (vent)
In the case of this embodiment, the filling material J is filled inside the receiving member 2 at the same time as the threaded reinforcing bar 1 is screwed together. Therefore, unlike the conventional receiving member 2, it is not necessary to provide the side surface of the receiving member 2 with a filling hole for injecting the filler J after the threaded reinforcing bar 1 is screwed. However, it is preferable to provide a vent hole 23 for discharging the air inside the receiving member 2 . That is, in the case of this embodiment, as soon as the threaded reinforcing bar 1 starts to be screwed into the receiving member 2, the gap between the male threaded portion 11 and the female threaded portion 21 is immediately sealed by the reinforcing bar fixing member 3, and the space inside the receiving member 2 is sealed. becomes a closed space. In that case, there is a possibility that the pressure inside the receiving member 2 increases as the threaded reinforcing bar 1 is screwed, and the filler J is pushed back.

よって、図１および図３、図４に示すように、受け部材２の長手方向の中間位置に、雌ネジ部２１と外部とを連通する少なくとも一つの通気孔２３を設けておくとよい。この通気孔２３は、従来の充填材Ｊを注入する孔を利用するものであっても良いし、それよりも小径の孔であってもよい。 Therefore, as shown in FIGS. 1, 3, and 4, it is preferable to provide at least one ventilation hole 23 at an intermediate position in the longitudinal direction of the receiving member 2, which communicates the female screw portion 21 with the outside. The vent hole 23 may be a conventional hole for injecting the filler J, or may be a hole with a smaller diameter than that.

このように本実施形態の鉄筋固定材３を用いることで、互いに接続するネジ鉄筋１と受け部材２との間に充填材Ｊを効率よく配置することができる。よって、ネジ鉄筋１の接続箇所や接続方向が様々であっても、また、ネジ鉄筋１の先端部が作業者の位置に比べて高所に位置するなど作業者の手が届き難い場所であっても接続作業が極めて容易となる。 By using the reinforcing bar fixing member 3 of the present embodiment in this manner, the filler J can be efficiently arranged between the threaded reinforcing bar 1 and the receiving member 2 that are connected to each other. Therefore, even if the connection points and connection directions of the threaded reinforcing bars 1 are various, and the tip of the threaded reinforcing bars 1 is located at a higher place than the worker's position, it is difficult for the worker to reach. However, the connection work becomes extremely easy.

〔第２実施形態〕
図５（ａ）に示すように、鉄筋固定材３の充填材Ｊを主剤Ｊ１と硬化剤Ｊ２とで構成することもできる。この場合、第１保護層３１と第２保護層３２との間に仕切層３４を設ける。即ち、主剤Ｊ１を仕切層３４と第１保護層３１との間に配置し、硬化剤Ｊ２を仕切層３４と第２保護層３２との間に配置する。図５（ｂ）に示すように、鉄筋固定材３の周囲には、融着や粘着などによって各層が互いに接合された封止部３５が形成される。 [Second embodiment]
As shown in FIG. 5(a), the filler J of the reinforcing bar fixing material 3 can also be composed of the main agent J1 and the curing agent J2. In this case, a partition layer 34 is provided between the first protective layer 31 and the second protective layer 32 . That is, the main agent J1 is arranged between the partition layer 34 and the first protective layer 31, and the curing agent J2 is arranged between the partition layer 34 and the second protective layer 32. As shown in FIG. 5(b), a sealing portion 35 is formed around the reinforcing bar fixing material 3, in which each layer is joined to each other by fusion or adhesion.

第１保護層３１および第２保護層３２、仕切層３４の厚みは、第１実施形態と同様に夫々数十ミクロンである。主剤Ｊ１の体積と硬化剤Ｊ２の体積とが異なる場合があるものの、主剤Ｊ１および硬化剤Ｊ２を含めて全体の厚みは０．５ｍｍ程度かそれよりも薄く形成される。尚、粘着層Ｎが付加される場合には、さらに数十ミクロンの厚みが付加される。 The thicknesses of the first protective layer 31, the second protective layer 32, and the partition layer 34 are each several tens of microns as in the first embodiment. Although the volume of the main agent J1 and the volume of the curing agent J2 may differ, the total thickness including the main agent J1 and the curing agent J2 is formed to be about 0.5 mm or thinner. In addition, when the adhesive layer N is added, the thickness of several tens of microns is added.

また、第１保護層３１および第２保護層３２、仕切層３４の最小引張強度方向は、原則として一致させる。その方が、ネジ鉄筋１の螺合時に各層が同時に破断し易くなり、主剤Ｊ１と硬化剤Ｊ２との混合が確実に行われるからである。ただし、図５（ｂ）に示すように、第１保護層３１における最小引張強度方向Ｘ１と、第２保護層３２における最小引張強度方向Ｘ２と、仕切層３４における最小引張強度方向Ｘ３とは、厳密に一致する必要はない。互いの方向の角度差が予め設定した許容角度α以内であれば、各層は実質的に同時に破断する。因みに、当該許容角度αは、例えば１５度である。 In principle, the minimum tensile strength directions of the first protective layer 31, the second protective layer 32, and the partition layer 34 are made to coincide. This is because each layer is more likely to break at the same time when the threaded reinforcing bars 1 are screwed together, and the main agent J1 and the hardening agent J2 are reliably mixed. However, as shown in FIG. 5B, the minimum tensile strength direction X1 in the first protective layer 31, the minimum tensile strength direction X2 in the second protective layer 32, and the minimum tensile strength direction X3 in the partition layer 34 are An exact match is not required. If the angular difference between the directions of each layer is within a preset allowable angle α, the layers are fractured substantially at the same time. Incidentally, the permissible angle α is, for example, 15 degrees.

さらに、図５（ａ）に示すように、例えば、第２保護層３２の表面に粘着層Ｎを設けておくと便利である。勿論、第１保護層３１の表面であっても良い。粘着層Ｎの表面には、粘着層Ｎの利用に際して取り外し可能な第３保護層３３を設けておく。このように粘着層Ｎを設けることで、鉄筋固定材３を予めネジ鉄筋１に貼り付けておくことができ、ネジ鉄筋１の接続作業の姿勢が任意となり、充填材Ｊの充填作業が容易となる。 Furthermore, as shown in FIG. 5A, it is convenient to provide an adhesive layer N on the surface of the second protective layer 32, for example. Of course, it may be the surface of the first protective layer 31 . A removable third protective layer 33 is provided on the surface of the adhesive layer N when the adhesive layer N is used. By providing the adhesive layer N in this way, the reinforcing bar fixing material 3 can be affixed to the threaded reinforcing bar 1 in advance, and the posture of the connecting work of the threaded reinforcing bar 1 can be arbitrary, and the filling work of the filler J is facilitated. Become.

用いる充填材Ｊとしては、例えば、ＪＦＥ条鋼製の二液性有機グラウト材である「ネジグラウトタイプＹ」がある。この有機グラウト材は、主剤Ｊ１と硬化剤Ｊ２とを２：１の体積比率で混合する。二液性であれば、ネジ鉄筋１の接続作業が終了した後に硬化が開始するから、鉄筋固定材３の長期管理が容易となる。 As the filler J to be used, for example, there is “screw grout type Y” which is a two-liquid organic grout material manufactured by JFE Bar Steel. This organic grout material is made by mixing the main agent J1 and the curing agent J2 at a volume ratio of 2:1. If it is a two-liquid type, hardening starts after the connection work of the screw reinforcing bar 1 is completed, so long-term management of the reinforcing bar fixing material 3 is facilitated.

尚、この有機グラウト材は、第１保護層３１等が破断され主剤Ｊ１が空気に触れることで徐々に硬化が始まる。よって、この有機グラウト材の場合、硬化剤Ｊ２は硬化時間の調節に利用可能である。また、この有機グラウト材は、主剤Ｊ１および硬化剤Ｊ２が硬化時に膨張する。よって、ネジ鉄筋１と受け部材２との隙間が確実に充填され、強固な接続部を得ることができる。 The organic grout material gradually begins to harden when the first protective layer 31 and the like are broken and the base material J1 comes into contact with air. Therefore, in the case of this organic grout material, the curing agent J2 can be used to adjust the curing time. Further, this organic grout material expands when the main agent J1 and the curing agent J2 are cured. Therefore, the gap between the screw reinforcing bar 1 and the receiving member 2 is reliably filled, and a strong connection can be obtained.

本実施形態の鉄筋固定材３を用いることで、互いに接続するネジ鉄筋１と受け部材２との間に二液性の充填材Ｊを簡単に配置し、効率的に混合することができる。よって、ネジ鉄筋１の接続箇所など、ネジ鉄筋１の配置方向が様々で、また、高所での接続が必要になるなど作業者の手が届き難い場所での接続作業が極めて容易となる。 By using the reinforcing bar fixing material 3 of the present embodiment, the two-liquid filler J can be easily arranged between the screw reinforcing bar 1 and the receiving member 2 that are connected to each other, and can be efficiently mixed. Therefore, it is extremely easy to perform the connection work in places where the screw reinforcing bars 1 are arranged in various directions, such as the connection points of the screw reinforcing bars 1, and where connection is required at a high place, which is difficult for workers to reach.

〔第３実施形態〕
図６（ａ）（ｂ）に示すように、二液性の充填材Ｊを用いる場合には、鉄筋固定材３を一枚の共通保護層３１ａを用いて構成することもできる。つまり、主剤Ｊ１および硬化剤Ｊ２を包持する部材として、上述の第１保護層３１および仕切層３４、第２保護層３２の代わりに、一枚の共通保護層３１ａを折り重ね、その間に主剤Ｊ１と硬化剤Ｊ２とを挟むものとする。 [Third embodiment]
As shown in FIGS. 6(a) and 6(b), when a two-liquid filler J is used, the reinforcing bar fixing material 3 can also be configured using a single common protective layer 31a. That is, instead of the above-described first protective layer 31, partition layer 34, and second protective layer 32, a sheet of common protective layer 31a is folded over as a member for holding the main agent J1 and the curing agent J2, and the main agent J1 and curing agent J2 are sandwiched.

作製においては、図６（ａ）に示すように、まず、所定長さの共通保護層３１ａを伸ばした状態とし、一方の端部近傍の所定の領域に主剤Ｊ１を塗布する。続いて、共通保護層３１ａを主剤Ｊ１の上に折り返し、主剤Ｊ１を挟み込む。さらに、共通保護層３１ａの表面に対し、主剤Ｊ１を塗布した領域と重なる状態に硬化剤Ｊ２を塗布したのち、硬化剤Ｊ２の表面を覆うように共通保護層３１ａを折り返す。最後に、主剤Ｊ１および硬化剤Ｊ２の周囲の領域につき、重なった共通保護層３１ａどうしを融着や粘着によって密封し、封止部３５を形成する。 In the fabrication, as shown in FIG. 6A, first, the common protective layer 31a having a predetermined length is stretched, and the main agent J1 is applied to a predetermined region near one end. Subsequently, the common protective layer 31a is folded over the main agent J1 to sandwich the main agent J1. Furthermore, after applying the curing agent J2 to the surface of the common protective layer 31a so as to overlap the area coated with the main agent J1, the common protective layer 31a is folded back so as to cover the surface of the curing agent J2. Finally, the overlapping common protective layers 31a are sealed by fusion bonding or adhesion to form a sealing portion 35 in the area around the main agent J1 and the curing agent J2.

図６（ｂ）に示すように、共通保護層３１ａの最小引張強度方向Ｘ４を、例えば、共通保護層３１ａの折曲線３６に沿うＸ方向に設定することで、形成された３層の夫々における最小引張強度方向Ｘ４が上手く一致する。勿論、最小引張強度方向Ｘ４は、図６におけるＸ方向と垂直なＹ方向に沿わせるものでもよい。 As shown in FIG. 6(b), the minimum tensile strength direction X4 of the common protective layer 31a is set, for example, in the X direction along the folding line 36 of the common protective layer 31a. The minimum tensile strength direction X4 is well matched. Of course, the minimum tensile strength direction X4 may be along the Y direction perpendicular to the X direction in FIG.

本構成であれば、充填材Ｊを保護すべき部材の部品数が削減され、鉄筋固定材３の構成が簡略化される。また、ネジ鉄筋１の螺合に際して破断し易い鉄筋固定材３を容易に得ることができる。 With this configuration, the number of parts for protecting the filler J is reduced, and the configuration of the reinforcing bar fixing member 3 is simplified. Further, it is possible to easily obtain the reinforcing bar fixing member 3 which is easily broken when the threaded reinforcing bar 1 is screwed.

〔第４実施形態〕
図７に示すように、二本のネジ鉄筋１を接続できる受け部材２としては、中央位置に壁部２４を設けておいても良い。本構成であれば、夫々のネジ鉄筋１を壁部２４に当接するまで螺入させせることができ、ネジ鉄筋１の螺合深さが簡単に決定できる。 [Fourth embodiment]
As shown in FIG. 7, a wall portion 24 may be provided at a central position as a receiving member 2 to which two screw reinforcing bars 1 can be connected. With this configuration, each threaded reinforcing bar 1 can be screwed into the wall portion 24 until it abuts on the wall portion 24, and the screwing depth of the threaded reinforcing bar 1 can be easily determined.

図７に示すように、夫々の雌ネジ部２１においては壁部２４の近傍に通気孔２３を設けておくと良い。また、他の構成としては、壁部２４に第２通気孔２３ａを設けておいても良い。この場合には、通気孔２３の一方は省略可能である。ただし、ネジ鉄筋１の接続に際しては、通気孔２３を設けていない側の雌ネジ部２１から接続作業を行うと、まず、当該側の雌ネジ部２１の空気が第２通気孔２３ａを介して排出され、続く他方の雌ネジ部２１の接続に際しては、通気孔２３を介して排気が円滑に行える。 As shown in FIG. 7, it is preferable to provide a ventilation hole 23 in the vicinity of the wall portion 24 in each female screw portion 21 . As another configuration, the wall portion 24 may be provided with the second vent holes 23a. In this case, one of the air holes 23 can be omitted. However, when connecting the screw reinforcing bar 1, if the connection work is performed from the female screw portion 21 on the side where the ventilation hole 23 is not provided, the air in the female screw portion 21 on that side first flows through the second ventilation hole 23a. When the other female screw portion 21 is connected after being discharged, the air can be smoothly discharged through the ventilation hole 23 .

ただし、このような通気孔２３および第２通気孔２３ａは必須の構成ではない。仮に鉄筋固定材３が雄ネジ部１１と雌ネジ部２１との隙間を密封し、受け部材２の内部に空気が閉じ込められた場合でも、硬化前の充填材Ｊは所定の流動性を有する。よって、ネジ鉄筋１を引き続き螺合させることで、圧力の上昇した空気の一部が充填材Ｊを押しのけて外部に排出される。 However, such ventilation hole 23 and second ventilation hole 23a are not essential components. Even if the reinforcing bar fixing material 3 seals the gap between the male threaded portion 11 and the female threaded portion 21 and air is trapped inside the receiving member 2, the filler J before hardening has a predetermined fluidity. Therefore, by continuing to screw the threaded reinforcing bar 1, part of the air whose pressure has increased pushes the filler J away and is discharged to the outside.

〔第５実施形態〕
図８に示すように、受け部材２に対するネジ鉄筋１の螺合に先立ち、鉄筋固定材３を受け部材２の内部に挿入して、雌ネジ部２１に向けて押し付けておいてもよい。図８は、天井スラブ４に埋設された受け部材２にネジ鉄筋１を接続する様子を示している。図８（ａ）（ｂ）に示すように、雌ネジ部２１の内部に鉄筋固定材３のみを配置し、雌ネジ部２１の内径よりも小さな外径を有する押え棒５を用いて鉄筋固定材３を雌ネジ部２１に押し付けるのが好ましい。 [Fifth embodiment]
As shown in FIG. 8 , prior to screwing the threaded reinforcing bar 1 onto the receiving member 2 , the reinforcing bar fixing member 3 may be inserted into the receiving member 2 and pressed toward the female screw portion 21 . FIG. 8 shows how the screw reinforcement 1 is connected to the receiving member 2 embedded in the ceiling slab 4 . As shown in FIGS. 8(a) and 8(b), only the reinforcing bar fixing member 3 is placed inside the female threaded portion 21, and the reinforcing bar is fixed using a presser bar 5 having an outer diameter smaller than the inner diameter of the female threaded portion 21. Preferably, the material 3 is pressed against the female threaded portion 21 .

ただし、このような押え棒５を用いなくても、鉄筋固定材３を雌ネジ部２１の内部に挿入したあと、少なくとも雌ネジ部２１の開口端部２１ａにおいて雄ネジ部１１と雌ネジ部２１とで鉄筋固定材３を挟む状態にすると、その後の雄ネジ部１１の螺合によって鉄筋固定材３は、順次、雄ネジ部１１と雌ネジ部２１との隙間に充填される。しかしながら、鉄筋固定材３が雄ネジ部１１と雌ネジ部２１との隙間にうまく充填されず、鉄筋固定材３の形状が乱れてネジ鉄筋１の端部に押され、雌ネジ部２１の底部に押し込まれる場合もある。この場合には、さらにネジ鉄筋１を螺入することで、鉄筋固定材３は雄ネジ部１１の先端で押しつぶされ、充填材Ｊが雄ネジ部１１と雌ネジ部２１との隙間を介して雌ネジ部２１の開口端部２１ａに向けて押し出される。このように、雌ネジ部２１の内部に予め鉄筋固定材３を配置しておくことで、図８（ｃ）に示すように、充填材Ｊを雄ネジ部１１と雌ネジ部２１との隙間に確実に充填することができる。 However, even if such a presser bar 5 is not used, after inserting the reinforcing bar fixing member 3 into the female threaded portion 21, at least the male threaded portion 11 and the female threaded portion 21 at the open end portion 21a of the female threaded portion 21 are separated from each other. When the reinforcing bar fixing member 3 is sandwiched between the two, the reinforcing bar fixing member 3 is sequentially filled in the gap between the male threaded portion 11 and the female threaded portion 21 by screwing the male threaded portion 11 thereafter. However, the reinforcing bar fixing member 3 is not well filled in the gap between the male threaded portion 11 and the female threaded portion 21 , and the shape of the reinforcing bar fixing member 3 is disturbed and pushed by the end of the threaded reinforcing bar 1 . sometimes pushed into. In this case, by further screwing in the screw reinforcing bar 1, the reinforcing bar fixing member 3 is crushed at the tip of the male threaded portion 11, and the filler J is pushed through the gap between the male threaded portion 11 and the female threaded portion 21. It is pushed out toward the open end 21 a of the female screw portion 21 . By disposing the reinforcing bar fixing material 3 in advance inside the female threaded portion 21 in this manner, the filler J is placed in the gap between the male threaded portion 11 and the female threaded portion 21 as shown in FIG. 8(c). can be reliably filled.

尚、図８の受け部材２は、ネジ鉄筋１を下方から羅合させる際には既に天井スラブ４に埋設されている。よって、この受け部材２には通気孔２３を設けていない。鉄筋固定材３が、仮に受け部材２の内部に空気を閉じ込めた場合でも、硬化前の充填材Ｊは空気を逃がすように流動可能であり、ネジ鉄筋１の螺合は特に問題なく実施可能である。 Incidentally, the receiving member 2 in FIG. 8 is already embedded in the ceiling slab 4 when the screw reinforcing bar 1 is interposed from below. Therefore, the receiving member 2 is not provided with the ventilation holes 23 . Even if the reinforcing bar fixing material 3 traps air inside the receiving member 2, the filling material J before hardening can flow so as to release the air, and the threaded reinforcing bar 1 can be screwed without any particular problem. be.

〔第６実施形態〕
図９に示すように、鉄筋固定材３をロール状に構成しておいてもよい。この鉄筋固定材３は使用に際してネジ鉄筋１の外面に巻き付ける。鉄筋固定材３の巻き付け方向、あるいは、巻き付けピッチは、鉄筋固定材３に用いた各保護層の引裂き特性に応じて決定すればよい。例えば、鉄筋固定材３の引裂き強度の弱い方向を鉄筋固定材３の幅方向に設定している場合には、鉄筋固定材３は、概ね雄ネジ部１１のネジ溝の方向に沿って螺旋状に巻き付けるのが良い。こうすることで、雄ネジ部１１を雌ネジ部２１に羅合する際に、鉄筋固定材３は双方のネジ溝の隙間の形状に沿うように変形して幅方向に引き伸ばされ、鉄筋固定材３の破断が促進される。 [Sixth Embodiment]
As shown in FIG. 9, the reinforcing bar fixing material 3 may be configured in a roll shape. This reinforcing bar fixing material 3 is wound around the outer surface of the screw reinforcing bar 1 in use. The winding direction or winding pitch of the reinforcing bar fixing material 3 may be determined according to the tear properties of each protective layer used for the reinforcing bar fixing material 3 . For example, when the direction in which the tear strength of the reinforcing bar fixing member 3 is weak is set in the width direction of the reinforcing bar fixing member 3, the reinforcing bar fixing member 3 is formed in a helical shape generally along the direction of the thread groove of the male screw portion 11. It is better to wrap it around By doing so, when the male threaded portion 11 is engaged with the female threaded portion 21, the reinforcing bar fixing member 3 is deformed and stretched in the width direction along the shape of the gap between the screw grooves on both sides, and the reinforcing bar fixing member 3 fracture is promoted.

尚、この他にも、雄ネジ部１１および雌ネジ部２１のピッチやネジ溝深さなどの形状、さらには、鉄筋固定材３の引裂き特性等に応じて、鉄筋固定材３の巻き付け態様を変更すると良い。 In addition to this, the manner of winding the reinforcing bar fixing material 3 can be changed according to the shapes such as the pitch of the male threaded portion 11 and the female threaded portion 21 and the depth of the screw groove, the tearing characteristics of the reinforcing bar fixing material 3, and the like. good to change.

また、鉄筋固定材３は、雄ネジ部１１に螺旋状に巻き付けるものでも良いし、鉄筋固定材３の長手方向をネジ鉄筋１の長手方向に直交させて、鉄筋固定材３の幅単位で複数箇所に巻き付けるものでもよい。何れの場合も、隣接するピッチの鉄筋固定材３の側縁部どうしが重ならないようにすると、充填材Ｊが雄ネジ部１１と雌ネジ部２１との隙間に充填され易くなって好ましい。 Further, the reinforcing bar fixing member 3 may be spirally wound around the male threaded portion 11, or the longitudinal direction of the reinforcing bar fixing member 3 may be perpendicular to the longitudinal direction of the screw reinforcing bar 1, and a plurality of reinforcing bar fixing members 3 may be wound in width units. It may also be wrapped around a point. In any case, if the side edges of the reinforcing bar fixing members 3 at adjacent pitches are not overlapped with each other, the filling material J can be easily filled in the gap between the male threaded portion 11 and the female threaded portion 21, which is preferable.

〔その他の実施形態〕
接続する鉄筋１ａとしては、ネジ鉄筋１の他に通常の節を有する鉄筋１ａを用いることもできる。この場合、受け部材２の内部には、充填材Ｊの係合機能を高めるために雌ネジ部２１ではなく何らかの凹凸形状を設けておくのが良い。その場合には、使用する充填材Ｊの膨張率や強度を高めておくと鉄筋１ａの抜け出し防止機能が向上する。 [Other embodiments]
As the reinforcing bar 1a to be connected, in addition to the threaded reinforcing bar 1, a reinforcing bar 1a having normal joints can be used. In this case, in order to improve the engagement function of the filling material J, it is preferable to provide some kind of concave-convex shape inside the receiving member 2 instead of the female screw portion 21 . In that case, if the expansion coefficient and strength of the filler J to be used are increased, the function of preventing the rebar 1a from slipping out is improved.

本発明の鉄筋固定材および当該鉄筋固定材を用いた鉄筋の接続方法は、鉄筋を受け部材に挿入し、充填材で固定する鉄筋の接続部に広く適用可能である。 INDUSTRIAL APPLICABILITY The reinforcing bar fixing material of the present invention and the method for connecting reinforcing bars using the reinforcing bar fixing material can be widely applied to connecting portions of reinforcing bars in which reinforcing bars are inserted into receiving members and fixed with fillers.

１ネジ鉄筋
１ａ鉄筋
１１雄ネジ部
２受け部材
２１雌ネジ部
２２孔部
３鉄筋固定材
３１第１保護層
３２第２保護層
３３第３保護層
Ｊ充填材
Ｊ１主剤
Ｊ２硬化剤
Ｎ粘着層
Ｘ１第１方向
Ｘ２第２方向
1 screw reinforcing bar 1a reinforcing bar 11 male threaded portion 2 receiving member 21 female threaded portion 22 hole portion 3 reinforcing bar fixing material 31 first protective layer 32 second protective layer 33 third protective layer J filler J1 main agent J2 curing agent N adhesive layer X1 First direction X2 Second direction

Claims

充填材を第１保護層および第２保護層で被覆しつつシート状に形成し、
前記第１保護層あるいは前記第２保護層の外面に粘着層を備え、当該粘着層のさらに外面に前記粘着層の利用に際して取り外す第３保護層が備えられたネジ鉄筋固定材。 forming a sheet while covering the filler with the first protective layer and the second protective layer;
A screw reinforcing bar fixing material provided with an adhesive layer on the outer surface of the first protective layer or the second protective layer, and further provided with a third protective layer on the outer surface of the adhesive layer to be removed when the adhesive layer is used.

前記充填材が、互いに仕切層で分離された主剤および硬化剤を備えている請求項１に記載のネジ鉄筋固定材。 The screw rebar fastener according to claim 1, wherein the filler material comprises a base agent and a hardener separated from each other by a partition layer.

前記第１保護層および前記第２保護層の夫々の平面に沿う方向において引張強度が最小となる方向として、前記第１保護層が第１方向を有し、前記第２保護層が第２方向を有し、
前記平面に垂直な方向視において、前記第１方向と前記第２方向とのなす角度が予め設定した角度以内である請求項１または２に記載のネジ鉄筋固定材。 The first protective layer has the first direction, and the second protective layer has the second direction, as the direction along the plane of each of the first protective layer and the second protective layer in which the tensile strength is the minimum. has
The screw reinforcing bar fixing material according to claim 1 or 2, wherein an angle formed by the first direction and the second direction is within a preset angle when viewed in a direction perpendicular to the plane.

表面に雄ネジ部を有するネジ鉄筋の端部を、前記雄ネジ部と螺合する雌ネジ部を備えた受け部材に挿入して前記ネジ鉄筋と前記受け部材とを接続する際に、
充填材が第１保護層および第２保護層で被覆されつつシート状に形成され、前記第１保護層あるいは前記第２保護層の外面に粘着層および第３保護層を備えた鉄筋固定材を、前記第３保護層を取り外したのち前記ネジ鉄筋の外面に巻き付け、
前記ネジ鉄筋を前記受け部材に螺合させつつ前記第１保護層および前記第２保護層を破断させて前記充填材を硬化させるネジ鉄筋の接続方法。 When inserting an end of a threaded reinforcing bar having a male threaded portion on its surface into a receiving member having a female threaded portion that screws together with the male threaded portion to connect the threaded reinforcing bar and the receiving member,
A filler is formed in a sheet shape while being covered with a first protective layer and a second protective layer, and a reinforcing bar fixing material provided with an adhesive layer and a third protective layer on the outer surface of the first protective layer or the second protective layer. , after removing the third protective layer, wound around the outer surface of the screw reinforcing bar,
A method for connecting threaded reinforcing bars, wherein the first protective layer and the second protective layer are broken while the threaded reinforcing bars are screwed into the receiving member to harden the filler.

前記充填材が、主剤および硬化剤を有すると共に、前記主剤および前記硬化剤が仕切層によって分離されつつ層状に重ねられ、前記主剤が前記第１保護層で被覆され、前記硬化剤が前記第２保護層で被覆されたものであり、
前記ネジ鉄筋を前記受け部材に螺合させることで、前記第１保護層および前記第２保護層および前記仕切層を破断させて前記主剤と前記硬化剤とを混合して硬化させる請求項４に記載のネジ鉄筋の接続方法。 The filler has a main agent and a curing agent, and the main agent and the curing agent are separated by a partition layer and stacked in layers, the main agent is covered with the first protective layer, and the curing agent is the second protective layer. is covered with a protective layer,
5. The main agent and the curing agent are mixed and cured by breaking the first protective layer, the second protective layer, and the partition layer by screwing the screw reinforcing bar into the receiving member . How to connect screw rebar as described.