JP2835932B2 - Rebar connection device - Google Patents
Rebar connection deviceInfo
- Publication number
- JP2835932B2 JP2835932B2 JP6248642A JP24864294A JP2835932B2 JP 2835932 B2 JP2835932 B2 JP 2835932B2 JP 6248642 A JP6248642 A JP 6248642A JP 24864294 A JP24864294 A JP 24864294A JP 2835932 B2 JP2835932 B2 JP 2835932B2
- Authority
- JP
- Japan
- Prior art keywords
- pair
- screw
- thread
- female screw
- pitch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、建築，土木等の分野に
おいて鉄筋コンクリート構造体の打ち継ぎ工法等に用い
られる鉄筋連結装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rebar connecting device used in a joint method of a reinforced concrete structure in the fields of construction, civil engineering, and the like.
【０００２】[0002]
【従来の技術】ねじ鉄筋を用いた鉄筋コンクリート構造
体の打ち継ぎ工法では、まず、ねじ鉄筋の一端部に筒状
継手の一端部を螺合させた状態でコンクリートを打ち込
むことにより、鉄筋コンクリート構造体を製造する。こ
の構造体では、コンクリートの外面に継手の他端が開口
している。この既設の鉄筋コンクリート構造体に、新た
に鉄筋コンクリート構造体を打ち継ぐ場合、ねじ鉄筋の
端部を継手にねじ込んで連結した後で、コンクリートを
打設する。2. Description of the Related Art In a splicing method of a reinforced concrete structure using a threaded reinforcing bar, first, concrete is driven in with one end of a tubular joint screwed to one end of a threaded reinforcing bar, thereby forming a reinforced concrete structure. To manufacture. In this structure, the other end of the joint is open on the outer surface of the concrete. When a new reinforced concrete structure is to be connected to the existing reinforced concrete structure, concrete is poured after the ends of the screw reinforcing bars are screwed into the joints and connected.
【０００３】上記打ち継ぎ工法では、ねじ鉄筋と継手の
連結強度を高める必要があり、そのための方法として、
ロックナットを用いる方法とグラウト材を用いる方法と
がある。前者の方法について詳述すると、ねじ鉄筋の端
部から十分な距離だけ離してロックナットを予め螺合さ
せておき、このねじ鉄筋の端部を既設の鉄筋コンクリー
ト構造体の継手にねじ込み、この後で、ロックナットを
継手の端面に向かって締め付ける。後者の方法の一例
は、特開平５ー１７１７４０号に開示されている。すな
わち、ねじ鉄筋を継手にねじ込んだ後に、両者の間にグ
ラウト材を充填して連結強度を高める。詳述すると、注
入管が予め継手に装着されている。この注入管は継手の
外周面に沿ってその軸線方向に延びており、一端が継手
の中央部を貫通してその内周面に開口しており、他端が
継手の他端において開口している。グラウト材は注入管
の開口から注入され、注入管を通って継手の中央部から
内部に入り込み、その注入圧力により、継手の内周面と
ねじ鉄筋の外周面との間の僅かな隙間に充填される。[0003] In the above joining method, it is necessary to increase the connection strength between the screw rebar and the joint.
There are a method using a lock nut and a method using a grout material. To explain the former method in detail, a lock nut is screwed in advance at a sufficient distance from the end of the threaded rebar, and the end of the threaded rebar is screwed into the joint of the existing reinforced concrete structure. Then, tighten the lock nut toward the end face of the joint. An example of the latter method is disclosed in JP-A-5-171740. That is, after screwing the screw rebar into the joint, a grout material is filled between the two to increase the connection strength. More specifically, an injection pipe is attached to the joint in advance. The injection pipe extends in the axial direction along the outer peripheral surface of the joint, one end of which penetrates the central part of the joint and opens on the inner peripheral surface, and the other end opens at the other end of the joint. I have. The grout material is injected from the opening of the injection pipe, enters through the injection pipe from the center of the joint, and fills the slight gap between the inner peripheral surface of the joint and the outer peripheral surface of the threaded bar due to the injection pressure. Is done.
【０００４】[0004]
【発明が解決しようとする課題】前者の方法では、鉄筋
と継手の連結強度を高めるために大きなトルクでロック
ナットを締め付けなければならず、打ち継ぎ現場におい
て大型の締付装置を必要とし、作業性が悪かった。後者
の工法では、注入管を必要とするため継手の構成が複雑
であった。In the former method, the lock nut has to be tightened with a large torque in order to increase the connection strength between the reinforcing bar and the joint. Sex was bad. In the latter method, the configuration of the joint was complicated because an injection pipe was required.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するた
め、請求項１〜４の発明に係わる鉄筋連結装置は、一対
の端継手と１つの中央継手とを備えている。請求項１の
発明は、請求項２〜４の発明を包含するものである。す
なわち、上記一対の端継手の各々は、一直線上に配置さ
れた雌ねじ部と微細ねじ部とを有し、上記雌ねじ部は上
記ねじ鉄筋と同一ピッチをなしてねじ鉄筋の端部に螺合
されるものであり、上記微細ねじ部は上記雌ねじ部より
遥かに小さなピッチを有しており、しかも、上記一対の
端継手の微細ねじ部は互いに長さおよびピッチが等しく
ねじ方向が逆である。上記中央継手は、外周の少なくと
も一部に工具掛け部を有するとともに、一直線上に配置
された一対の微細ねじ部を有し、これら微細ねじ部は、
互いに長さが等しくねじ方向が逆であるとともに、上記
一対の端継手の微細ねじ部と同一ピッチをなしており、
これら端継手の微細ねじ部にそれぞれ螺合される。請求
項２の発明では、上記一対の端継手の各々は、筒形状を
なしているとともに、一直線をなして連なる第１雌ねじ
部と第２雌ねじ部を有し、上記第１雌ねじ部は上記ねじ
鉄筋と同一ピッチをなしてねじ鉄筋の端部に螺合される
ものであり、上記第２雌ねじ部は上記第１雌ねじ部より
遥かに小さなピッチの微細ねじをなしており、しかも、
上記一対の端継手の第２雌ねじ部は互いに長さおよびピ
ッチが等しくねじ方向が逆である。上記中央継手は、中
央部に工具掛け部を有し、この工具掛け部の両側に互い
に一直線をなして延びる一対の雄ねじ部を有し、これら
雄ねじ部は、互いに長さが等しくねじ方向が逆であると
ともに、上記一対の端継手の第２雌ねじ部と同一ピッチ
の微細ねじをなしており、これら端継手の第２雌ねじ部
にそれぞれ螺合される。請求項３の発明では、上記一対
の端継手の各々は、筒形状をなしているとともに、一直
線上に配置された第１雌ねじ部および第２雌ねじ部と、
これら第１，第２雌ねじ部間に形成された隔壁とを有
し、上記第１雌ねじ部は上記ねじ鉄筋と同一ピッチをな
してねじ鉄筋の端部に螺合されるものであり、上記第２
雌ねじ部は上記第１雌ねじ部より遥かに小さなピッチの
微細ねじをなしており、しかも、上記一対の端継手の第
２雌ねじ部は互いに長さおよびピッチが等しくねじ方向
が逆である。上記中央継手は、中央部外周に工具掛け部
を有し、この工具掛け部の両側に互いに一直線をなして
延びる一対の雄ねじ部を有し、これら雄ねじ部は、互い
に長さが等しくねじ方向が逆であるとともに、上記一対
の端継手の第２雌ねじ部と同一ピッチの微細ねじをなし
ており、これら一対の端継手の第２雌ねじ部にそれぞれ
螺合される。請求項４の発明では、上記一対の端継手の
各々は、雌ねじ部を形成してなる筒部と、この筒部の端
から雌ねじ部と同一直線をなして反対方向に延びる雄ね
じ部とを有し、上記雌ねじ部は上記ねじ鉄筋と同一ピッ
チをなしてねじ鉄筋の端部に螺合されるものであり、上
記雄ねじ部は上記雌ねじ部より遥かに小さなピッチの微
細ねじをなしており、しかも、上記一対の端継手の雄ね
じ部は互いに長さおよびピッチが等しくねじ方向が逆で
ある。上記中央継手は筒形状をなし、その外周の少なく
とも一部が工具掛け部となっており、さらに、一直線を
なして連なる一対の雌ねじ部を有し、これら一対の雌ね
じ部は、互いに長さが等しくねじ方向が逆方向であると
ともに、上記一対の端継手の雄ねじ部と同ピッチをな
し、これら雄ねじ部に螺合される。In order to solve the above-mentioned problems, a rebar connecting device according to the present invention comprises a pair of end joints and one central joint. The invention of claim 1 includes the inventions of claims 2 to 4. That is, each of the pair of end joints has a female thread portion and a fine thread portion arranged on a straight line, and the female thread portion is screwed to an end of the screw rebar at the same pitch as the screw rebar. The fine thread portion has a much smaller pitch than the female thread portion, and the fine thread portions of the pair of end joints are equal in length and pitch to each other and have opposite screw directions. The central joint has a tool hook portion on at least a part of the outer periphery, and has a pair of fine screw portions arranged on a straight line, and these fine screw portions are
The screw directions are equal to each other and the screw directions are opposite, and have the same pitch as the fine thread portions of the pair of end joints,
Each of these end joints is screwed into a fine thread portion. According to the second aspect of the invention, each of the pair of end joints has a cylindrical shape, and has a first female screw portion and a second female screw portion which are connected in a straight line, and the first female screw portion is formed of the screw. It is screwed to the end of the screw rebar at the same pitch as the rebar, and the second female thread is a fine thread with a pitch much smaller than the first female thread, and
The second female thread portions of the pair of end joints have the same length and pitch, and opposite thread directions. The center joint has a tool hook at a center portion, and has a pair of male screw portions extending in a straight line on both sides of the tool hook, and these male screw portions are equal in length to each other and have opposite screw directions. In addition, a fine thread having the same pitch as the second female screw portion of the pair of end joints is formed, and each of the fine screws is screwed to the second female screw portion of the end joint. In the invention according to claim 3, each of the pair of end joints has a cylindrical shape, and includes a first female screw portion and a second female screw portion arranged on a straight line,
A partition wall formed between the first and second female screw portions, wherein the first female screw portion is screwed to an end of the screw rebar at the same pitch as the screw rebar; 2
The female thread portion is a fine thread having a pitch much smaller than that of the first female thread portion, and the second female thread portions of the pair of end joints have the same length and pitch, and are opposite in thread direction. The center joint has a tool hook on the outer periphery of the central portion, and has a pair of male screw portions extending in a straight line on both sides of the tool hook, and these male screw portions are equal in length to each other and have a screw direction. On the contrary, it forms a fine thread having the same pitch as the second female thread of the pair of end joints, and is screwed into the second female thread of the pair of end joints. In the invention of claim 4, each of the pair of end joints has a cylindrical portion forming a female screw portion, and a male screw portion extending in the opposite direction from the end of the cylindrical portion in a straight line with the female screw portion. The female screw portion is screwed to the end of the screw rebar at the same pitch as the screw rebar, and the male screw portion forms a fine screw with a pitch much smaller than the female screw portion, and The male screw portions of the pair of end joints have the same length and pitch and have opposite screw directions. The center joint has a cylindrical shape, at least a part of the outer periphery of which is a tool hook portion, and further has a pair of female screw portions that are aligned in a straight line. The screw directions are equally opposite, have the same pitch as the male screw portions of the pair of end joints, and are screwed to these male screw portions.
【０００６】[0006]
【作用】請求項１の発明では、一対の端継手の雌ねじ部
に一対のねじ鉄筋の互いに対向する端部を螺合させた状
態で、中央継手を回して、中央継手の一対の微細ねじ部
を一対の端継手の微細ねじ部に螺合させる。この際、中
央継手の一対の微細ねじ部のねじ方向が互いに逆向きで
あるために、一対の端継手が互いに近付く。そして、こ
の中央継手を締め付けることにより、一対のねじ鉄筋が
一対の端継手，中央継手を介して連結される。中央継手
の微細ねじ部と端継手の微細ねじ部は、ねじ鉄筋に比べ
て遥かに小さなピッチであるため、中央継手の工具掛け
部に掛けられた工具を、従来に比べて小さいトルクで回
しても、強い締め付け力を得ることができる。その結
果、大型の締付装置を用いずに、ねじ鉄筋の強い連結強
度が得られ、作業性が向上する。請求項２の発明では、
中央継手の一対の雄ねじ部を一対の端継手の第２雌ねじ
部に螺合させる。そして、これら雄ねじ部の端面が、一
対の端継手の第１雌ねじ部に螺合されたねじ鉄筋の端面
に当たった状態で、中央継手を締める。この際、ねじ鉄
筋の端面と雄ねじ部の端面は互いに他から押し力を受け
る。そのため、中央継手の雄ねじ部と端継手の第２雌ね
じ部との間の連結強度が高まるばかりではなく、ねじ鉄
筋と端継手の第１雌ねじ部との連結強度も高めることが
できる。その他、請求項１の作用が得られることは勿論
である。請求項３の発明では、中央継手の一対の雄ねじ
部の端面が隔壁に当たった状態で中央継手の締付がなさ
れる。その結果、請求項１とほぼ同等の作用が得られ
る。請求項４の発明では、一対の端継手の雄ねじ部の端
面同士が当たった状態で中央継手の締付がなされる。そ
の結果、請求項１とほぼ同等の作用が得られる。According to the first aspect of the present invention, the central joint is turned in a state where the opposite ends of the pair of threaded rebars are screwed into the female threaded portions of the pair of end joints, and the pair of fine threaded portions of the central joint are rotated. Is screwed into the fine thread portion of the pair of end joints. At this time, since the screw directions of the pair of fine thread portions of the central joint are opposite to each other, the pair of end joints approach each other. Then, by tightening the center joint, the pair of threaded reinforcing bars are connected via the pair of end joints and the center joint. Since the fine thread of the central joint and the fine thread of the end joint have a much smaller pitch than the threaded rebar, the tool hooked on the tool hook of the central joint can be turned with a smaller torque than before. Also, a strong tightening force can be obtained. As a result, a strong connection strength of the screw rebar is obtained without using a large-sized fastening device, and workability is improved. In the invention of claim 2,
A pair of male thread portions of the central joint are screwed into a second female thread portion of the pair of end joints. Then, the central joint is tightened in a state where the end faces of the male screw portions are in contact with the end surfaces of the screw rebars screwed to the first female screw portions of the pair of end joints. At this time, the end face of the screw reinforcing bar and the end face of the male screw portion receive a pressing force from each other. Therefore, not only the connection strength between the male screw part of the center joint and the second female screw part of the end joint can be increased, but also the connection strength between the screw rebar and the first female screw part of the end joint can be increased. In addition, it is needless to say that the effect of claim 1 can be obtained. According to the third aspect of the present invention, the center joint is tightened in a state where the end surfaces of the pair of male screw portions of the center joint abut against the partition wall. As a result, substantially the same operation as the first aspect is obtained. According to the fourth aspect of the invention, the center joint is tightened in a state where the end faces of the male screw portions of the pair of end joints are in contact with each other. As a result, substantially the same operation as the first aspect is obtained.
【０００７】[0007]
【実施例】以下、本発明の第１実施例を図１を参照して
説明する。図１において、符号１０は、ねじ鉄筋１，２
を連結するための鉄筋連結装置１０を示す。鉄筋連結装
置１０は、一対の端継手１１，１２と、１つの中央継手
１３とを備えている。端継手１１，１２は、それぞれ筒
形状をなし、全長にわたって六角形の断面形状を有して
おり、その外周が工具掛け部１１ｘ，１２ｘとなってい
る。なお、中央部にのみ工具掛け部を有し、その両側部
を円筒部としてもよい。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG. In FIG. 1, reference numeral 10 denotes screw rebars 1, 2.
1 shows a reinforcing-bar connecting device 10 for connecting the steel bars. The rebar connection device 10 includes a pair of end joints 11 and 12 and one central joint 13. The end joints 11 and 12 each have a tubular shape, have a hexagonal cross-sectional shape over the entire length, and have outer peripheries serving as tool hooks 11x and 12x. In addition, it is good also as having a tool hook part only in a center part and the both sides being a cylindrical part.
【０００８】上記一方の端継手１１（図中左側の端継
手）は、第１雌ねじ部１１ａと第２雌ねじ部１１ｂ（微
細ねじ部）を有している。これら雌ねじ部１１ａ，１１
ｂは、端継手１１の中心軸に沿って延びるとともに一直
線をなして連なっている。第１雌ねじ部１１ａは端継手
１１の一端面（図中左端面）に開口し、第２雌ねじ部１
１ｂは端継手１１の他端面（図中右端面）に開口してい
る。The one end joint 11 (the left end joint in the drawing) has a first female thread 11a and a second female thread 11b (fine thread). These female thread portions 11a, 11
“b” extends along the central axis of the end joint 11 and extends in a straight line. The first female screw portion 11a opens at one end surface (left end surface in the figure) of the end joint 11, and the second female screw portion 1a
1b is open at the other end surface (the right end surface in the figure) of the end joint 11.
【０００９】上記一方の端継手１１の第１雌ねじ部１１
ａは上記ねじ鉄筋１，２の等しいピッチＰ1を有してお
り、そのねじ方向はねじ鉄筋１，２と同様に右ねじであ
る。上記第２雌ねじ部１１ｂは上記第１雌ねじ部１１ａ
より遥かに小さなピッチＰ2を有しており、通常の機械
ねじと同程度の微細ねじをなしている。例えば、第１雌
ねじ部１１ａのピッチＰ1が１０数ｍｍであり、第２雌
ねじ部１１ｂのピッチＰ2が１〜２ｍｍ程度である。The first internal thread 11 of the one end joint 11
a has an equal pitch P 1 of the screw reinforcing bars 1,2, the screw direction is right-hand thread like the screw rebar 1,2. The second female thread 11b is connected to the first female thread 11a.
It has more much smaller pitch P 2, and forms a normal machine screws and comparable fine thread. For example, the pitch P 1 of the first female threaded portion 11a is ten mm, the pitch P 2 of the second female threaded portion 11b is about 1 to 2 mm.
【００１０】他方の端継手１２も上記端継手１１と同寸
法で同じ構造を有しており、工具掛け部１２ｘと、ピッ
チＰ1の第１雌ねじ部１２ａと、ピッチＰ2の第２雌ねじ
部１２ｂ（微細ねじ部）とを有している。ただし、端継
手１１の第２雌ねじ部１１ｂが右ねじであるのに対し
て、端継手１２の第２雌ねじ部１２ｂが、これとは逆に
左ねじとなっている。[0010] The other end fitting 12 also has the same structure with the same dimensions as the end fitting 11, and a tool-engaging portion 12x, a first female screw portion 12a of the pitch P 1, a second female threaded portion of the pitch P 2 12b (fine screw portion). However, the second female screw portion 11b of the end joint 11 has a right-hand thread, whereas the second female screw portion 12b of the end joint 12 has a left-hand screw.
【００１１】上記中央継手１３は、中央部に断面六角形
の工具掛け部１３ｘを有し、この工具掛け部１３ｘの両
側に互いに一直線をなして延びる一対の雄ねじ部１３
ａ，１３ｂ（微細ねじ部）を有している。これら雄ねじ
部１３ａ，１３ｂは互いに長さが等しく、上記端継手１
１，１２の第２雌ねじ部１１ｂ，１２ｂと同一ピッチＰ
2の微細ねじをなしている。また、これら雄ねじ部１３
ａ，１３ｂは、ねじ方向が逆であり、一方の雄ねじ部１
３ａは右ねじであり、他方の雄ねじ部１３ｂは左ねじで
ある。The center joint 13 has a tool hook 13x having a hexagonal cross section at the center thereof, and a pair of male threaded portions 13 extending straight on both sides of the tool hook 13x.
a, 13b (fine screw portion). These male thread portions 13a and 13b are equal in length to each other.
The same pitch P as the second female screw portions 11b and 12b of the first and second female threads 12b
It has 2 fine screws. In addition, these male screw portions 13
a and 13b have opposite screw directions, and one of the male screw portions 1
3a is a right-hand thread, and the other male thread portion 13b is a left-hand thread.
【００１２】次に、上記鉄筋連結装置１０を用いて壁に
梁を打ち継ぐ工法を説明する。図１（Ａ）に示すよう
に、複数のねじ鉄筋１（図では１本のみ示す）の一端部
に端継手１１の第１雌ねじ部１１ａを螺合させる。この
螺合状態において、ねじ鉄筋１の一端部に予め螺合させ
ておいたロックナット３を、端継手１１に向かってトル
クをかけて締め付けることにより、ねじ鉄筋１と端継手
１１とを連結する。なお、上記のようにロックナット３
を工具でトルクをかけて締め付ける際に、端継手１１の
工具掛け部１１ｘに他の工具を掛けてその回動を防止す
る。Next, a method of connecting a beam to a wall using the above-described reinforcing bar connecting device 10 will be described. As shown in FIG. 1A, a first female thread 11a of an end joint 11 is screwed to one end of a plurality of threaded reinforcing bars 1 (only one is shown in the figure). In this screwed state, the screw nut 1 and the end joint 11 are connected by tightening the lock nut 3 previously screwed to one end of the screw reinforcing bar 1 by applying a torque toward the end joint 11. . Note that, as described above, the lock nut 3
When tightening with a tool by applying a torque, another tool is hooked on the tool hook portion 11x of the end joint 11 to prevent its rotation.
【００１３】次に、端継手１１の一端（右端）側の開口
を図示しないキャップで閉塞するとともに型枠に当てた
状態で、上記ねじ鉄筋１を型枠内に収容し、この型枠内
にコンクリート５を打設することにより、図１（Ａ）に
示す鉄筋コンクリート構造体としての壁Ｗを構築する。
コンクリート５養生後に、型枠を取り外すとともに、端
継手１１の開口からキャップを外す。これにより、端継
手１１の開口すなわち第２雌ねじ部１１ｂの開口がコン
クリート５の面に現れる。Next, with the opening at one end (right end) of the end joint 11 closed with a cap (not shown) and applied to the formwork, the screw reinforcing bar 1 is housed in the formwork, and is inserted into the formwork. By casting the concrete 5, a wall W as a reinforced concrete structure shown in FIG. 1A is constructed.
After curing the concrete 5, the mold is removed and the cap is removed from the opening of the end joint 11. Thereby, the opening of the end joint 11, that is, the opening of the second female screw portion 11b appears on the surface of the concrete 5.
【００１４】他方、図１（Ａ）に示すように、梁（鉄筋
コンクリート構造体）用のねじ鉄筋２の端部には、予め
上記端継手１２の第１雌ねじ部１２ａとロックナット４
が螺合されており、この螺合状態で、ロックナット４を
上記ロックナット３の場合と同様にトルクをかけて締め
付けることにより、端継手１２と鉄筋２の連結がなされ
ている。On the other hand, as shown in FIG. 1A, the first female screw portion 12a of the end joint 12 and the lock nut 4 are previously provided at the end of the threaded reinforcing bar 2 for the beam (reinforced concrete structure).
Are screwed, and in this screwed state, the lock nut 4 is tightened by applying torque in the same manner as in the case of the lock nut 3, whereby the end joint 12 and the reinforcing bar 2 are connected.
【００１５】上記ねじ鉄筋２は、中央継手１３，端継手
１１，１２を介してねじ鉄筋１に連結される。その連結
作業について詳述すると、図１（Ａ）に示すように、中
央継手１３を端継手１１，１２間に配置するとともに、
中央継手１３の一対の雄ねじ１３ａ，１３ｂと、端継手
１２，ねじ鉄筋２とを、端継手１１，ねじ鉄筋１に対し
て一直線上に配置した状態で、中央継手１３の一対の雄
ねじ部１３ａ，１３ｂの端を端継手１１，１２の第２雌
ねじ部１１ｂ，１２ｂの開口端に当てる。この状態で、
図１（Ｂ）に示すように、中央継手１３の工具掛け部１
３ｘに工具を掛けて矢印方向に回すと、中央継手１３の
一対の雄ねじ部１３ａ，１３ｂが、互いに逆方向のねじ
であるため、端継手１１，１２の第２雌ねじ部１１ｂ，
１２ｂに螺合される。The screw reinforcing bar 2 is connected to the screw reinforcing bar 1 via a center joint 13 and end joints 11 and 12. The connection work will be described in detail. As shown in FIG. 1A, the center joint 13 is arranged between the end joints 11 and 12, and
In a state where the pair of male threads 13a and 13b of the central joint 13 and the end joint 12 and the threaded reinforcing bar 2 are arranged in a straight line with respect to the end coupling 11 and the threaded reinforcing bar 1, a pair of male threaded portions 13a and The end of 13b is brought into contact with the open ends of the second internal thread portions 11b and 12b of the end joints 11 and 12. In this state,
As shown in FIG. 1B, the tool hook 1 of the central joint 13
When a tool is applied to 3x and turned in the direction of the arrow, the pair of male screw portions 13a and 13b of the central joint 13 are screws in directions opposite to each other.
12b.
【００１６】さらに中央継手１３を回し続けると、図１
（Ｃ）に示すように、一対の雄ねじ部１３ａ，１３ｂの
端面が、予め端継手１１，１２の第１雌ねじ部１１ａ，
１２ａに螺合されていたねじ鉄筋１，２の端面にそれぞ
れ当たる。その後で、さらに、中央継手１３を締め付け
ると、雄ねじ部１３ａ，１３ｂの端面とねじ鉄筋１，２
の端面とがそれぞれ強い力で当たる。その結果、雄ねじ
部１３ａ，１３ｂのねじ山と端継手１１，１２の第２雌
ねじ部１１ｂ，１２ｂのねじ山との間にそれぞれがたが
あるにも拘わらず、上記当接面での互いの反発力によ
り、これら螺合関係にある両者のねじ山が強い力で接
し、ひいては中央継手１３と端継手１１，１２との間で
強固な連結が得られる。同様に、上記当接面での反発力
によりねじ鉄筋１，２のねじ山と端継手１１，１２の第
１雌ねじ部１１ａ，１２ａのねじ山とが強い力で接する
ので両者の強固な連結が得られる。なお、上記のように
中央継手１３を工具でトルクをかけて締め付ける際に、
端継手１２の工具掛け部１２ｘまたはねじ鉄筋１２に他
の工具を掛けてその回動を防止する。If the center joint 13 is further rotated, FIG.
As shown in (C), the end faces of the pair of male screw portions 13a, 13b are previously set to the first female screw portions 11a, 11a of the end joints 11, 12.
The end faces of the screw rebars 1 and 2 screwed to 12a respectively. Thereafter, when the central joint 13 is further tightened, the end faces of the externally threaded portions 13a, 13b and the screw rebars 1, 2
And the end face of each hit with a strong force. As a result, although there is a play between the threads of the male threads 13a, 13b and the threads of the second female threads 11b, 12b of the end joints 11, 12, each other at the contact surface. Due to the repulsive force, the two threads in the threaded relationship come into contact with each other with a strong force, and a strong connection between the center joint 13 and the end joints 11 and 12 can be obtained. Similarly, the resilient force at the contact surface causes the threads of the screw rebars 1 and 2 and the threads of the first female thread portions 11a and 12a of the end joints 11 and 12 to come into contact with each other with a strong force. can get. When tightening the center joint 13 by applying torque with a tool as described above,
Another tool is hooked on the tool hook 12x or the screw reinforcing bar 12 of the end joint 12 to prevent its rotation.
【００１７】ここで重要なことは、端継手１１，１２の
第２ねじ部１１ｂ，１２ｂと中央継手１３の雄ねじ部１
３ａ，１３ｂのピッチＰ2がねじ鉄筋１，２のピッチＰ1
より遥かに小さいことである。そのため、人手によりあ
るいは小型の締付装置を用いて中央継手１３に掛けられ
た工具を比較的小さなトルクで回すだけで、大きな締付
力を得ることができ、ねじ鉄筋１，２の連結強度を高め
ることができる。したがって、従来のように、大きなト
ルクを発生させる大型の締付装置が不要となる。What is important here is that the second thread portions 11b and 12b of the end joints 11 and 12 and the male thread portion 1 of the center joint 13
3a, the pitch P 1 of 13b pitch P 2 screw rebar 1,2
It is much smaller. Therefore, a large tightening force can be obtained only by turning the tool hung on the central joint 13 with a relatively small torque manually or by using a small tightening device, and the connection strength of the screw rebars 1, 2 can be increased. Can be enhanced. Therefore, there is no need for a large-sized fastening device that generates a large torque as in the related art.
【００１８】次に、梁用の型枠でねじ鉄筋２を囲んだ状
態でコンクリートを打設することにより、梁を構築し、
打ち継ぎを完了する。Next, concrete is cast in a state in which the screw reinforcing bar 2 is surrounded by the beam formwork, thereby constructing the beam.
Complete the joint.
【００１９】なお、上記実施例において、ロックナット
３，４の端継手１１，１２への締付は補助的に行われる
ものであり、大きなトルクを必要としない。また、ねじ
鉄筋の連結をより一層強いものとするために、ロックナ
ット３，４に大きなトルクを掛ける場合でも、このロッ
クナット３，４の締付作業は打ち継ぎ現場でなくてもで
きるので、打ち継ぎ現場での作業性向上に支障を伴わな
い。これらロックナット３，４は省いてもよい。In the above embodiment, the lock nuts 3, 4 are tightened to the end joints 11, 12 in an auxiliary manner and do not require a large torque. Further, even when a large torque is applied to the lock nuts 3 and 4 in order to further strengthen the connection of the screw rebars, the work of tightening the lock nuts 3 and 4 can be performed at a splice site. There is no hindrance to improving workability at the connection site. These lock nuts 3 and 4 may be omitted.
【００２０】図２に示す第２実施例は、図１に示す第１
実施例と良く似ているので、同番号を付してその詳細な
説明を省略する。以下、異なる点のみ説明する。第２実
施例では、図２（Ａ）に示すように、端継手１１の第１
雌ねじ部１１ａと第２雌ねじ部１１ｂとが、連通されて
おらず、隔壁１１ｃにより仕切られている。また、端継
手１１の第１雌ねじ部１１ａの奥端部を囲む周壁には、
グラウト材のための注入口１１ｄが貫通形成されてい
る。同様に、端継手１２にも、隔壁１２ｃとグラウト材
のための注入口１２ｄが形成されている。The second embodiment shown in FIG. 2 is similar to the first embodiment shown in FIG.
Since this embodiment is very similar to the embodiment, the same reference numerals are given and the detailed explanation is omitted. Hereinafter, only different points will be described. In the second embodiment, as shown in FIG.
The female screw portion 11a and the second female screw portion 11b are not communicated, and are separated by a partition 11c. In addition, on the peripheral wall surrounding the back end of the first female screw portion 11a of the end joint 11,
An injection port 11d for the grout material is formed through. Similarly, the end joint 12 is also formed with a partition wall 12c and an inlet 12d for grout material.
【００２１】上記第２実施例において、端継手１１の第
１雌ねじ部１１ａにねじ鉄筋１の端部が螺合された状態
で、注入口１１ｄからグラウト材が注入されて、ねじ鉄
筋１の外周面と第１雌ねじ部１１ａの内周面との間に充
填されることにより、ねじ鉄筋１と端継手１１との間の
連結強度が高められる。同様に、端継手１２の第１雌ね
じ部１２ａにねじ鉄筋２の端部が螺合された状態で、注
入口１２ｄからグラウト材が注入され、ねじ鉄筋２と端
継手１２との連結強度が高められる。In the second embodiment, the grout material is injected from the injection port 11d with the end of the threaded rebar 1 screwed into the first female threaded portion 11a of the end joint 11, and the outer periphery of the threaded rebar 1 is By filling between the surface and the inner peripheral surface of the first female screw portion 11a, the connection strength between the screw reinforcing bar 1 and the end joint 11 is increased. Similarly, a grout material is injected from the injection port 12 d in a state where the end of the threaded rebar 2 is screwed into the first female screw portion 12 a of the end joint 12, and the connection strength between the threaded rebar 2 and the end joint 12 is increased. Can be
【００２２】図２（Ｂ）に示すように、中央継手１３を
回して雄ねじ部１３ａ，１３ｂを端継手１１，１２の第
２雌ねじ部１１ｂ，１２ｂに螺合させる点は、第１実施
例と同様である。この螺合が進むと、図２（Ｃ）に示す
ように、中央継手１３の雄ねじ部１３ａ，１３ｂの端面
が、端継手１１，１２の隔壁１１ｃ，１２ｃに当たり、
さらに中央継手１３を回すことにより、締付がなされ
る。この雄ねじ部１３ａ，１３ｂと隔壁１１ｃ，１２ｃ
とが強い力で当接することにより、中央継手１３と端継
手１１，１２との間の連結強度が高まり、ひいてはねじ
鉄筋１，２間の連結強度が高まる。As shown in FIG. 2B, the point that the central joint 13 is turned to screw the male screw portions 13a, 13b into the second female screw portions 11b, 12b of the end joints 11, 12 is different from the first embodiment in that The same is true. When this screwing proceeds, as shown in FIG. 2C, the end faces of the externally threaded portions 13a and 13b of the central joint 13 hit the partition walls 11c and 12c of the end joints 11 and 12, respectively.
By further turning the central joint 13, tightening is performed. These male screw portions 13a, 13b and partition walls 11c, 12c
The contact strength between the center joint 13 and the end joints 11 and 12 increases, and the connection strength between the screw rebars 1 and 2 increases.
【００２３】上記第２実施例では、グラウト材を用いる
が、このグラウト材注入に要する構造は、端継手１１，
１２に注入口１１ｄ，１２ｄを形成するだけであるか
ら、端継手１１，１２の構造を複雑にするものではな
い。なお、鉄筋と端継手との連結強度を高めるためにロ
ックナットを用いてもよい。この場合、ロックナットは
打ち継ぎ現場と異なる場所で締め付けることができる。In the above second embodiment, a grout material is used.
Since only the injection ports 11d and 12d are formed in the end joint 12, the structure of the end joints 11 and 12 is not complicated. Note that a lock nut may be used to increase the connection strength between the reinforcing bar and the end joint. In this case, the lock nut can be tightened at a place different from the joint site.
【００２４】図３は、第３実施例をなす鉄筋連結装置２
０を示している。この鉄筋連結装置２０も、一対の端継
手２１，２２と、中央継手２３とを備えている。一方の
端継手２１は、筒部２１’を備えている。この筒部２
１’は断面六角形状をなし、その外周が工具掛け部２１
ｘとなっている。筒部２１’にはこの筒部２１’の中心
軸に沿って延びる雌ねじ部２１ａが形成されている。こ
の雌ねじ部２１ａの一端はふさがれている。筒部２１’
の端面からは、雄ねじ部２１ｂ（微細ねじ部）が、この
雌ねじ部２１ａと一直線をなして雌ねじ部２１ａと反対
方向に延びている。また、雌ねじ部２１ａの奥端部を囲
む周壁には、グラウト材のための注入口２１ｄが形成さ
れている。上記雌ねじ部２１ａのピッチＰ2はねじ鉄筋
１，２と等しく、雄ねじ部２１ｂのピッチＰ2はこれよ
り遥かに小さく微細である。他方の端継手２２も、上記
端継手２１と同一寸法で、同じ構成をなし、筒部２
２’，工具掛け部２２ｘ，ピッチＰ1の雌ねじ部２２
ａ，ピッチＰ2の雄ねじ部２２ｂ，グラウト材のための
注入口２２ｄを有している。ただし、雄ねじ部２２ｂの
ねじ方向が端継手２１の雄ねじ部２１ｂと逆である。FIG. 3 shows a reinforcing bar connecting device 2 according to a third embodiment.
0 is shown. This rebar connection device 20 also includes a pair of end joints 21 and 22 and a center joint 23. One end joint 21 has a tubular portion 21 '. This cylindrical part 2
1 ′ has a hexagonal cross section, and its outer periphery is
x. The cylindrical portion 21 'is formed with a female screw portion 21a extending along the central axis of the cylindrical portion 21'. One end of the female screw portion 21a is closed. Tube part 21 '
An external thread 21b (fine thread) extends in a direction opposite to the internal thread 21a in a straight line with the internal thread 21a from the end face. In addition, an inlet 21d for a grout material is formed in a peripheral wall surrounding the inner end of the female screw portion 21a. Pitch P 2 of the female screw portion 21a is equal to the screw rebar 1,2, pitch P 2 of the male screw portion 21b is much smaller fine than this. The other end joint 22 also has the same dimensions and the same configuration as the end joint 21,
2 ', the tool-engaging portion 22x, the pitch P 1 internal thread portion 22
a, it has a male screw portion 22b of the pitch P 2, the inlet 22d for grout. However, the screw direction of the male screw portion 22b is opposite to the male screw portion 21b of the end joint 21.
【００２５】中央継手２３は、筒形状をなしており、全
長にわたって断面六角形状をなしてその外周が工具掛け
部２３ｘとなっている。なお、中央部にのみ工具掛け部
を有し、その両側部を円筒部としてもよい。中央継手２
３は、一対の雌ねじ部（微細ねじ部）２３ａ，２３ｂを
有している。これら雌ねじ部２３ａ，２３ｂは、中央継
手２３の中心軸に沿って互いに一直線をなして連なって
いる。これら雌ねじ部２３ａ，２３ｂの長さは等しく、
その境界は、中央継手２３の中央に位置する。雌ねじ部
２３ａ，２３ｂは、上記端継手２１，２２の雄ねじ部２
１ｂ，２２ｂと等しいピッチＰ2を有しており、ねじ方
向が互いに逆になっている。The central joint 23 has a cylindrical shape, has a hexagonal cross section over the entire length, and has an outer periphery serving as a tool hook 23x. In addition, it is good also as having a tool hook part only in a center part and the both sides being a cylindrical part. Central joint 2
3 has a pair of female screw parts (fine screw parts) 23a and 23b. The female screw portions 23a and 23b are connected to each other along a central axis of the central joint 23 in a straight line. These female screw portions 23a and 23b are equal in length,
The boundary is located at the center of the central joint 23. The female screw portions 23a and 23b are connected to the male screw portions 2 of the end joints 21 and 22.
1b, 22b and has a pitch equal P 2, the screw direction is opposite to each other.
【００２６】上記第３実施例では、第２実施例と同様
に、グラウト材により鉄筋１，２と端継手２１，２２の
連結強度を高めるが、ロックナットを用いてもよいこと
は勿論である。図３（Ａ）に中央継手２３，端継手２
２，鉄筋２を、壁Ｗ内の鉄筋１，端継手１１と一直線を
なすように配置し、図３（Ｂ）の矢印で示すように中央
継手２３を回すことにより、中央継手２３の雌ねじ部２
３ａ，２３ｂを端継手２１，２２の雄ねじ部２１ｂ，２
２ｂに螺合させる。中央継手２３をさらに回すと、上記
螺合が進み、端継手２１，２２の雄ねじ部２１ｂ，２２
ｂの端面同士が当たる。さらに中央継手２３を締め付け
ると、中央継手２３と一対の端継手２１，２２の連結強
度を高めることができる。In the third embodiment, as in the second embodiment, the connection strength between the rebars 1, 2 and the end joints 21, 22 is increased by the grout material, but it goes without saying that a lock nut may be used. . FIG. 3A shows the center joint 23 and the end joint 2.
2, the reinforcing bar 2 is arranged so as to be in line with the reinforcing bar 1 in the wall W and the end joint 11, and the center joint 23 is turned as shown by an arrow in FIG. 2
3a, 23b are connected to the external thread portions 21b, 2 of the end joints 21, 22.
2b. When the central joint 23 is further turned, the above-mentioned screwing proceeds, and the external thread portions 21b, 22 of the end joints 21, 22 are formed.
The end faces b contact each other. When the center joint 23 is further tightened, the connection strength between the center joint 23 and the pair of end joints 21 and 22 can be increased.
【００２７】本発明の鉄筋連結装置は、打継工法以外
に、一対のねじ鉄筋の連結する必要がある他の工法にも
用いられる。The rebar connection device of the present invention can be used in other methods in which a pair of threaded rebars need to be connected in addition to the joining method.
【００２８】[0028]
【発明の効果】以上説明したように、請求項１〜４の発
明によれば、一対のねじ鉄筋の連結に際して、微細ねじ
を有する３つの継手を用いることにより、小さなトルク
で大きな締付力を得ることができるので、大型の締付装
置を用いずに済み、作業性がよい。また、継手の構造も
簡単であり、低コストで製造できる。また、請求項２の
発明では、中央継手の一対の雄ねじ部の端面が、一対の
端継手の第１雌ねじ部に螺合されたねじ鉄筋の端面に当
たった状態で、中央継手の締め付けがなされるため、中
央継手の雄ねじ部と端継手の第２雌ねじ部との間の連結
強度を高めることができるばかりではなく、ねじ鉄筋と
端継手の第１雌ねじ部との連結強度も高めることができ
る。As described above, according to the first to fourth aspects of the present invention, when connecting a pair of screw rebars, a large tightening force can be obtained with a small torque by using three joints having fine threads. Since it can be obtained, it is not necessary to use a large tightening device, and the workability is good. Further, the structure of the joint is simple and can be manufactured at low cost. In the invention of claim 2, the center joint is tightened in a state where the end faces of the pair of male thread portions of the center joint are in contact with the end faces of the screw rebars screwed to the first female thread portions of the pair of end joints. Therefore, not only can the connection strength between the male screw part of the center joint and the second female screw part of the end joint be increased, but also the connection strength between the screw rebar and the first female screw part of the end joint can be increased. .
【図１】本発明の第１実施例の鉄筋連結装置を用いた打
継工法を（Ａ）〜（Ｃ）の順で示す断面図である。FIG. 1 is a sectional view showing a joining method using a rebar connection device according to a first embodiment of the present invention in the order of (A) to (C).
【図２】本発明の第２実施例の鉄筋連結装置を用いた打
継工法を（Ａ）〜（Ｃ）の順で示す断面図である。FIG. 2 is a sectional view showing a joining method using a rebar connection device according to a second embodiment of the present invention in the order of (A) to (C).
【図３】本発明の第２実施例の鉄筋連結装置を用いた打
継工法を（Ａ）〜（Ｃ）の順で示す断面図である。FIG. 3 is a cross-sectional view showing a joining method using a rebar connection device according to a second embodiment of the present invention in the order of (A) to (C).
１０，２０ … 鉄筋連結継手 １１，１２，２１，２２ … 端継手 １３，２３ … 中央継手 １１ａ，１２ａ … 第１雌ねじ部（雌ねじ部） １１ｂ，１２ｂ … 第２雌ねじ部（微細ねじ部） １１ｃ，１２ｃ … 隔壁 １３ａ，１３ｂ … 雄ねじ部（微細ねじ部） ２１’，２２’ … 筒部 ２１ａ，２２ａ … 雌ねじ部 ２１ｂ，２２ｂ … 雄ねじ部（微細ねじ部） ２３ａ，２３ｂ … 雌ねじ部（微細ねじ部） 10, 20 ... rebar connection joints 11, 12, 21, 22 ... end joints 13, 23 ... central joints 11a, 12a ... first female thread portions (female thread portions) 11b, 12b ... second female thread portions (fine thread portions) 11c, 12c ... partition wall 13a, 13b ... male screw part (fine screw part) 21 ', 22' ... cylindrical part 21a, 22a ... female screw part 21b, 22b ... male screw part (fine screw part) 23a, 23b ... female screw part (fine screw part)
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) E04C 5/18 102──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 6 , DB name) E04C 5/18 102
Claims (4)
おいて、一対の端継手と１つの中央継手とを備え、 上記一対の端継手の各々は、一直線上に配置された雌ね
じ部と微細ねじ部とを有し、上記雌ねじ部は上記ねじ鉄
筋と同一ピッチをなしてねじ鉄筋の端部に螺合されるも
のであり、上記微細ねじ部は上記雌ねじ部より遥かに小
さなピッチを有しており、しかも、上記一対の端継手の
微細ねじ部は互いに長さおよびピッチが等しくねじ方向
が逆であり、 上記中央継手は、外周の少なくとも一部に工具掛け部を
有するとともに、一直線上に配置された一対の微細ねじ
部を有し、これら微細ねじ部は、互いに長さが等しくね
じ方向が逆であるとともに、上記一対の端継手の微細ね
じ部と同一ピッチをなしており、これら端継手の微細ね
じ部にそれぞれ螺合されることを特徴とする鉄筋連結装
置。1. An apparatus for connecting a pair of threaded rebars, comprising a pair of end joints and one central joint, wherein each of the pair of end joints has a female screw portion and a fine screw thread arranged in a straight line. And the female screw portion is screwed to the end of the screw rebar at the same pitch as the screw rebar, and the fine thread portion has a much smaller pitch than the female screw portion In addition, the fine threaded portions of the pair of end joints have the same length and pitch and are opposite in thread direction, and the central joint has a tool hook portion on at least a part of the outer periphery and is arranged on a straight line. These fine threaded portions have the same length and mutually opposite thread directions, and have the same pitch as the fine threaded portions of the pair of end joints. To the fine thread Iron rod connecting apparatus characterized by being engaged, respectively threadedly.
おいて、一対の端継手と１つの中央継手とを備え、 上記一対の端継手の各々は、筒形状をなしているととも
に、一直線をなして連なる第１雌ねじ部と第２雌ねじ部
を有し、上記第１雌ねじ部は上記ねじ鉄筋と同一ピッチ
をなしてねじ鉄筋の端部に螺合されるものであり、上記
第２雌ねじ部は上記第１雌ねじ部より遥かに小さなピッ
チの微細ねじをなしており、しかも、上記一対の端継手
の第２雌ねじ部は互いに長さおよびピッチが等しくねじ
方向が逆であり、 上記中央継手は、中央部に工具掛け部を有し、この工具
掛け部の両側に互いに一直線をなして延びる一対の雄ね
じ部を有し、これら雄ねじ部は、互いに長さが等しくね
じ方向が逆であるとともに、上記一対の端継手の第２雌
ねじ部と同一ピッチの微細ねじをなしており、これら端
継手の第２雌ねじ部にそれぞれ螺合されることを特徴と
する鉄筋連結装置。2. An apparatus for connecting a pair of threaded rebars, comprising a pair of end joints and one central joint, each of said pair of end joints having a cylindrical shape and forming a straight line. A first female screw portion and a second female screw portion, the first female screw portion being screwed to an end of the screw rebar at the same pitch as the screw rebar, and the second female screw portion being The second internal thread portion of the pair of end joints has the same length and pitch and the opposite screw direction, and the central joint is formed of a fine thread having a pitch much smaller than the first internal thread portion. It has a tool hook at the center, and has a pair of male threads extending in a straight line on both sides of the tool hook, and these male threads are equal in length and opposite in screw direction to each other. Second female screw of a pair of end joints And which forms a fine thread of the same pitch, the iron rod connecting apparatus according to claim each be screwed into the second female threaded portion of these end fittings.
において、一対の端継手と１つの中央継手とを備え、 上記一対の端継手の各々は、筒形状をなしているととも
に、一直線上に配置された第１雌ねじ部および第２雌ね
じ部と、これら第１，第２雌ねじ部間に形成された隔壁
とを有し、上記第１雌ねじ部は上記ねじ鉄筋と同一ピッ
チをなしてねじ鉄筋の端部に螺合されるものであり、上
記第２雌ねじ部は上記第１雌ねじ部より遥かに小さなピ
ッチの微細ねじをなしており、しかも、上記一対の端継
手の第２雌ねじ部は互いに長さおよびピッチが等しくね
じ方向が逆であり、 上記中央継手は、中央部外周に工具掛け部を有し、この
工具掛け部の両側に互いに一直線をなして延びる一対の
雄ねじ部を有し、これら雄ねじ部は、互いに長さが等し
くねじ方向が逆であるとともに、上記一対の端継手の第
２雌ねじ部と同一ピッチの微細ねじをなしており、これ
ら一対の端継手の第２雌ねじ部にそれぞれ螺合されるこ
とを特徴とする鉄筋連結装置。3. An apparatus for connecting a pair of threaded rebars, comprising a pair of end joints and one central joint, wherein each of the pair of end joints has a cylindrical shape and is aligned with a straight line. A first female screw portion, a second female screw portion, and a partition wall formed between the first and second female screw portions, wherein the first female screw portion has the same pitch as the screw reinforcing bar The second internal thread is formed with a fine thread having a pitch much smaller than the first internal thread, and the second internal threads of the pair of end joints are mutually connected. The length and pitch are equal and the screw directions are opposite.The center joint has a tool hook on the outer periphery of the center, and has a pair of male screw portions extending in a straight line on both sides of the tool hook, These male threads are equal in length The thread direction is opposite, and a fine thread having the same pitch as the second female screw part of the pair of end joints is formed, and is screwed to the second female screw part of the pair of end joints, respectively. Rebar connection device.
おいて、一対の端継手と１つの中央継手とを備え、 上記一対の端継手の各々は、雌ねじ部を形成してなる筒
部と、この筒部の端から雌ねじ部と同一直線をなして反
対方向に延びる雄ねじ部とを有し、上記雌ねじ部は上記
ねじ鉄筋と同一ピッチをなしてねじ鉄筋の端部に螺合さ
れるものであり、上記雄ねじ部は上記雌ねじ部より遥か
に小さなピッチの微細ねじをなしており、しかも、上記
一対の端継手の雄ねじ部は互いに長さおよびピッチが等
しくねじ方向が逆であり、 上記中央継手は筒形状をなし、その外周の少なくとも一
部が工具掛け部となっており、さらに、一直線をなして
連なる一対の雌ねじ部を有し、これら一対の雌ねじ部
は、互いに長さが等しくねじ方向が逆方向であるととも
に、上記一対の端継手の雄ねじ部と同ピッチをなし、こ
れら雄ねじ部に螺合されることを特徴とする鉄筋連結装
置。4. An apparatus for connecting a pair of screw rebars, comprising a pair of end joints and one central joint, wherein each of the pair of end joints has a cylindrical portion forming a female screw portion; A male screw portion extending in the opposite direction from the end of the cylindrical portion in the same straight line as the female screw portion, wherein the female screw portion is screwed to the end of the screw rebar at the same pitch as the screw rebar. The male thread part has a fine thread with a pitch much smaller than the female thread part, and the male thread parts of the pair of end joints are equal in length and pitch to each other and have opposite screw directions. Has a cylindrical shape, at least a part of the outer periphery of which is a tool hook portion, and further has a pair of female screw portions connected in a straight line. Is in the opposite direction In, without the male screw portion and the pitch of the pair of end fittings, reinforcing bar coupling device, characterized in that screwed into these male screw portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6248642A JP2835932B2 (en) | 1994-09-16 | 1994-09-16 | Rebar connection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6248642A JP2835932B2 (en) | 1994-09-16 | 1994-09-16 | Rebar connection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0886047A JPH0886047A (en) | 1996-04-02 |
| JP2835932B2 true JP2835932B2 (en) | 1998-12-14 |
Family
ID=17181159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6248642A Expired - Fee Related JP2835932B2 (en) | 1994-09-16 | 1994-09-16 | Rebar connection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2835932B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3365722B2 (en) | 1997-03-31 | 2003-01-14 | 日東精工株式会社 | Screw point |
| KR20020081966A (en) * | 2001-04-21 | 2002-10-30 | 주식회사 하이스트 | A reinforcing rod coupler structure and coupling device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5954618U (en) * | 1982-10-04 | 1984-04-10 | 住友金属工業株式会社 | Joint structure of deformed reinforcing bars |
| JPS59102825U (en) * | 1982-12-28 | 1984-07-11 | 株式会社神戸製鋼所 | Connection device for steel rods for concrete reinforcement |
| JPS63122852A (en) * | 1986-11-10 | 1988-05-26 | 新日本製鐵株式会社 | Method for jointing screw reinforcing bars fixed so as to provide intervals |
-
1994
- 1994-09-16 JP JP6248642A patent/JP2835932B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0886047A (en) | 1996-04-02 |
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