JP3370245B2 - Rebar joint structure - Google Patents

Rebar joint structure

Info

Publication number
JP3370245B2
JP3370245B2 JP30748896A JP30748896A JP3370245B2 JP 3370245 B2 JP3370245 B2 JP 3370245B2 JP 30748896 A JP30748896 A JP 30748896A JP 30748896 A JP30748896 A JP 30748896A JP 3370245 B2 JP3370245 B2 JP 3370245B2
Authority
JP
Japan
Prior art keywords
sleeve
deformed
connection
reinforcing bar
sleeve member
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 - Lifetime
Application number
JP30748896A
Other languages
Japanese (ja)
Other versions
JPH10131303A (en
Inventor
亮 清水
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fuji Bolt Manufacturing Co Ltd
Original Assignee
Fuji Bolt Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fuji Bolt Manufacturing Co Ltd filed Critical Fuji Bolt Manufacturing Co Ltd
Priority to JP30748896A priority Critical patent/JP3370245B2/en
Publication of JPH10131303A publication Critical patent/JPH10131303A/en
Application granted granted Critical
Publication of JP3370245B2 publication Critical patent/JP3370245B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Joining Of Building Structures In Genera (AREA)
  • Reinforcement Elements For Buildings (AREA)

Description

【発明の詳細な説明】 【0001】 【発明の属する技術分野】本発明は土木・建築等の建設
現場における異形鉄筋同士を突き合わせて連結する鉄筋
の継手構造に関するものである。 【0002】 【従来の技術】土木・建築などの建設現場において使用
する異形鉄筋の突き合わせ連結の手段としては各種の溶
接法による溶着の他、ねじ機構を利用してなるいわゆる
機械継手が採用されている。 【0003】図6に示すように、このような機械継手
は、予め工場で突き合わせ連結しようとする1対の異形
鉄筋31,32の各先端部に予めそれぞれ接続用スリー
ブ33,34を固着したものを採用している。両スリー
ブ33,34は、接続ボルト35を介して接続すること
により鉄筋同士を突き合わせ連結するようにしたもので
ある。一方の接続用スリーブ33には、一方の鉄筋31
の先端挿入して建設現場において固定し、この一方の
スリーブのめねじ部33aに接続ボルト35のおねじ部
35aをねじ込み、さらにこの接続ボルトを他方の鉄筋
32の先端部が固着してある接続用スリーブ34のめね
じ部をねじ込んで鉄筋同士を連結している。連結作業は
一方のスリーブに予め接続ボルト35をねじ込んでお
き、他方の鉄筋32のスリーブ34のめねじ穴をこの接
続ボルトの先端に位置合わせし、この鉄筋32をトルク
レンチ等で鉄筋を回転させるなどしている。 【0004】 【発明が解決しようとする課題】上記した従来技術は、
生産性及び施工現場における作業性に秀れたものである
ことから広範に採用されつつある。しかしながら、連結
強度及び施工コストの面から以下のような指摘がなされ
ている。その第1として、従来技術における接続用スリ
ーブ33,34は、外丸の管状部材の一端に異形鉄筋の
先端を挿着して、外周から半径方向の力を加えて圧着す
るものであるため、鉄筋の先端の全周にわたって、この
スリーブの内周面がほぼ均等の圧着になっている。こ
のことは全体的にみた場合には、大きな圧着力が必要で
あることを意味している。その第2として、両方の接続
スリーブ33,34にねじ込む接続ボルト35は、鉄
31,32の強さに対応するものであることが要求さ
れることから、このボルトの材質をクロム・モリブデン
鋼等の熱処理品を採用しているため、接続ボルトが高価
なものとなっている問題がある。さらに第3として、
続用スリーブ33,34の外周が円形であるため、施工
現場における連結作業において、一方の鉄筋を回転させ
るのに上述したようにトルクレンチなどを用いている
が、レンチでつかむ部分既製の六角レンチが使用でき
ないという不都合があった。 【0005】 【課題を解決するための手段】上記の諸問題を解決する
ために本発明は、以下のような手段を採用した。まず、
第1に、接続用スリーブとして外周が六角などの多角形
に形成してなる管状素材を所定長に切断してなるスリー
ブ部材を採用し、このスリーブ部材の一端から所定長範
囲にめねじ部を刻設し、他端からこのめねじ部の内端部
までの範囲に鉄筋の先端部を挿着して圧着してある。こ
の圧着は、多角形の各角部を中心に向けて変形するよう
に圧縮力を働かせて、変形させるようにしたもので、主
に多角形の角部が変形し、辺部には大きな圧縮力が働か
ないためそれ程の圧縮変形力が生じない。この結果、各
角部に対応する内周面が中心方向に向けて変形して、鉄
筋の周囲にくい込むように強い力で圧縮変形する。これ
に反して、多角形の辺部に対応する内周面の変形量は小
さいため、圧着力は弱いものとなっている。このような
圧着力の強弱により、鉄筋とスリーブとの間には全体と
しては強力な圧着力が得られている。 【0006】第2に、接続ボルトが螺合される接続用ス
リーブのめねじ部は、管状素材の内周面にめねじを刻設
するようにしてあるため、必然的に接続ボルトの呼び径
(外径)は、鉄筋の径よりも大きなものとなる。このた
め接続ボルトに働く引張荷重に対する抵抗力が大きくな
り、従来技術で採用していたクロム・モリブデン鋼の熱
処理品などをボルトの素材として採用しなくてもよくな
り、一般の構造用鋼を使用することが可能となる。 【0007】第3に、接続用スリーブのめねじ部が刻設
してある範囲の外周の形状は多角形にしてあるので、施
工現場における連結作業の際には、対向する2辺にスパ
ナなどを合わせることにより、鉄筋を回すことができる
ので施工現場における連結作業が容易になる。 【0008】 【発明の実施の形態】次に本発明の実施形態について説
明する。図1は、本発明の実施形態の一例を示すもの
で、突き合わせ連結する1対の異形鉄筋1,2の各先端
部に接続用スリーブ3,4を固着し、各スリーブのめね
じ部3a,4aに植込みボルト状の接続ボルト5をねじ
込んで、両者を連結してある。 【0009】図2は、一方の異形鉄筋2とその先端部に
固着された接続用スリーブ4を示すもので、このスリー
ブ4の先端部(左端)から全長のほぼ3分の1の位置ま
でめねじ部4aが刻設してある。めねじ部4aと同一内
径の鉄筋の挿着用穴部4bには、異形鉄筋2の先端部が
挿着され、鉄筋が挿着されている範囲を外周から中心に
向けて圧縮変形させることにより圧着してある。 【0010】次に本発明の継手構造について、接続用ス
リーブ3,4の製造から、異形鉄筋1,2同士の連結ま
での工程について説明する。スリーブの素材としては、
円形鋼管を引抜き加工により外周が六角形で内周が円形
に形成してなる管状素材としたものを採用してある。こ
の管状素材を所定長に切断し、その一端部から所定長範
囲にめねじを切って、図3に示すようなスリーブ部材1
3とする。同図において、めねじ部13aの内径は異形
鉄筋の挿着用穴部13bの内径と共通するようにしてめ
ねじ用の下穴の穿設加工を不要としている。めねじ部
3aは、スリーブ部材の一端から全長のほぼ3分の1程
度の範囲にタップ立て等により刻設する。 【0011】次にでき上がったスリーブ部材13の挿着
穴部13bに異形鉄筋1の先端部を挿着する。周知の
通り、異形鉄筋の外周には、図4に示すように抜け止
め用の突条(ふし)1aが設けてあるため、この突条が
設けてある部分の直径と穴部の内径とが対応するように
穴部の寸法を決めてある。すなわち、鉄筋の先端を
着用穴部13bに軽く圧入可能な関係になるように、こ
穴部13bの内径を調節しておく。 【0012】次に図4に示すように、鉄筋1の先端部に
スリーブ部材13を挿着した状態で、このスリーブ部材
の周囲からプレス装置の金型6を用いて上下両方向から
圧縮力を働かせ、角部13cを丸く変形させることによ
って両者を圧着する。金型6は、2つ割りのダイスにそ
れぞれ長手方向に半円状の溝部6a,6aを設けたもの
を用いている。これらの溝部6aに、スリーブ部材13
の圧着すべき範囲をとり囲むように送り込み、ダイスに
上下方向から力を加えてこのスリーブ部材を変形可能に
構成してある。 【0013】金型6の溝部6a,6aによってスリーブ
部材13の外周に力を加えると、この溝部の内周面は、
初めはスリーブ部材の外周の角部13a…にのみ力を作
用させて中心に向けて押し潰すように変形させる。これ
により、スリーブ部材13挿着用穴部13bの内面
は、変形した角部13cの内側がふくらむように内方に
張り出して、鉄筋1の外周にくい込むような状態とな
る。さらにダイスに力を加えると、スリーブ部材13
角部13cが潰れて外周がほぼ円形に変形し、内周面は
鉄筋1の外周に圧着した状態となる。この圧着は、上述
したように、スリーブ部材の角部13cの部分が中心に
向かって大きく変形することにより、この部分の圧着力
は大きくなっている。これに対し、各辺の部分の変形量
は小さいため圧着力は弱くなっており、全体的にみた場
合に、波形状の強弱分布状態となっており、全体的には
大きな圧着力となっている。なお、スリーブ部材13の
めねじ部13aが刻設してある範囲の外周は、ダイスに
よる変形がないので六角の形状を維持している。このよ
うにして鉄筋の先端に変形して固着してあるスリーブ部
材13は、図2に示す接続用スリーブ4である。 【0014】次に本発明に係る鉄筋の継手構造による鉄
筋の連結要領について説明する。周知の通り、異形鉄筋
1,2は、鉄筋コンクリート造の建設現場において、予
め縦横及び垂直に配筋しておくもので、鉄筋同士の端部
同士は互いに突き合わせ連結してあるが、この連結を本
発明に係る継手構造を採用することにより容易に行なう
ことができる。 【0015】まず、先端に一方の接続用スリーブ3を固
着した一方の鉄筋1を施工現場に固定設置しておく。次
に図5に示す所定長の接続ボルト5を一方の接続用スリ
ーブ3のめねじ部3aにねじ込む。接続ボルトのねじ
込み深さは、このボルトがめねじ部3a内で止まるまで
深くねじ込み、十分な接合強さが得られるようにする。
次に、相手方の鉄筋2の接続用スリーブ4を位置合わせ
して、このスリーブのめねじ部を接続ボルト5に螺合さ
せる。この螺合は、相手方の鉄筋2を回転させることに
より行なう。この相手方の鉄筋の回転は、接続用スリ
ーブ4の外周の六角になっている部分に大形のスパナを
当ててトルクを加えることによって行なえばよい。な
お、鉄筋の回転はトルクレンチその他の工具によって
トルクを加えるようにしてもよい。連結作業はスリーブ
の六角の部分を用いて、鉄筋を回転させるものであるの
で、大きなトルクが容易に得られ、連結作業が極めて楽
になる利点がある。 【0016】以上の発明においては、スリーブの多角形
を六角形として説明してあるが、これは四角形でも八角
形であってもよい。なお,スリーブによる鉄筋の連結の
形式としては、上述のように一方の鉄筋を回転させるこ
とにより接続するもののほか、接続ボルトを半分ずつ右
ねじと左ねじとし、ボルトを回転させて連結するもの
や、ボルトを深くねじ込んだ後に相手方のスリーブを近
ずけて、ボルトをねじ戻して相手方に螺合させ,ロック
ナットでゆるみ止めをするものなどがある。これらの場
合には、鉄筋そのものを回転させることはない。なお、
本発明により強力な圧着力が得られ、かつ、低品質ボル
トを使用可能とする本発明の長所が減殺されるものでは
ない。 【0017】また、本発明は接続ボルトを介して鉄筋同
士を突き合わせ連結する場合に適用したものであるが、
他の手段として、この接続ボルトを用いないで連結する
ことも可能である。例えば、工場で一方の鉄筋の先端部
に予めスリーブ部材を固着しておき、施工現場において
他方の鉄筋の先端部をスリーブの他方の孔部から挿着し
て圧着することにより、各鉄筋の先端部同士を直接的に
付き合わせて連結することも可能である。多角形の角部
を潰して圧着することにより強力な連結力が得られ、か
つ接続ボルト及びめねじ部の刻設が不要となる上にスリ
ーブも1個でよいので施工コストの節減が可能となる特
徴を有する。 【0018】 【発明の効果】本発明によれば、外周が多角形で内周が
円形のスリーブ部材を用い、一端から異形鉄筋の先端を
挿着し、この挿着した部分を中心に向けて圧縮変形させ
ることによって鉄筋にスリーブを圧着するものであるた
め、圧着に強弱が生じ大きな結合力が得られる。また、
スリーブ部材の鉄筋挿着用穴部とめねじ部の内径とが同
一となるため、このめねじと螺合すべき接続ボルトの径
が大きくなり、異形鉄筋と同等以上の引張荷重に耐え得
るものとなっている。この結果、ボルト材として従来技
術のようなクロム・モリブデン鋼などの高級材を使わな
くてもよいので、施工コストの低減に寄与する。なお,
スリーブの多角形の辺の部分は、そのままスパナなどを
あてがうのに適するので現場における作業性を向上させ
ることができる。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure for reinforcing bars for connecting deformed reinforcing bars in a construction site such as civil engineering or a building by abutting each other. 2. Description of the Related Art As means for butt-connecting deformed reinforcing bars used in construction sites such as civil engineering and construction, in addition to welding by various welding methods, a so-called mechanical joint using a screw mechanism has been adopted. I have. As shown in FIG. 6, such a mechanical joint is provided with connecting sleeves 33, 32 at the tips of a pair of deformed reinforcing bars 31, 32 to be butt-connected at a factory in advance. 34 is fixed. The sleeves 33 and 34 are connected via connecting bolts 35 so that the reinforcing bars are butt-connected. One connecting sleeve 33 has one reinforcing bar 31
Tip insert were fixed at the construction site, screw the external thread portion 35a of the connecting bolt 35 to the female screw portion 33a of the one <br/> sleeve further tip portion of the other side of the reinforcing bar 32 the connection bolt Is screwed into the female thread of the connection sleeve 34 to which the reinforcing bars are fixed to connect the rebars. In the connection operation, the connection bolt 35 is screwed into one sleeve in advance, the female screw hole of the sleeve 34 of the other reinforcing bar 32 is aligned with the tip of the connecting bolt, and the reinforcing bar 32 is rotated with a torque wrench or the like. And so on. [0004] The prior art described above,
It is being widely adopted because it excels in productivity and workability at construction sites. However, the following has been pointed out in terms of connection strength and construction cost. First, the connection sleeves 33 and 34 in the prior art are formed by inserting the tip of a deformed reinforcing bar into one end of an outer round tubular member and applying a radial force from the outer periphery to crimp the reinforcing bar. the entire circumference of the tip, the inner peripheral surface of the <br/> sleeve is nearly uniform crimping force. This means that a large crimping force is required as a whole. Second, both connections
Connecting bolt 35 screwed into use sleeve 33 and 34, since it corresponds to the strength of iron <br/> muscle 31, 32 is required, the material of the bolt, such as a chromium-molybdenum steel heat treatment There is a problem that the connection bolt is expensive because of the use of a product. Third, contact
Since the outer periphery of the connection sleeve 33, 34 is circular, the coupling operation in the construction site, but by using a torque wrench as described above to rotate the one rebar, ready-made hex the portion gripped by a wrench There was an inconvenience that a wrench could not be used. [0005] In order to solve the above problems, the present invention employs the following means. First,
First, a sleeve member obtained by cutting a tubular material whose outer periphery is formed into a polygon such as a hexagon as a connecting sleeve is cut into a predetermined length, and an internal thread portion is provided within a predetermined length range from one end of the sleeve member. The front end of the rebar is inserted and crimped in the range from the other end to the inner end of the female thread. In this crimping, the compression force is applied so that each corner of the polygon is deformed toward the center, so that the polygon is deformed. Since the force does not work, there is not so much compressive deformation force. As a result, the inner peripheral surface corresponding to each corner is deformed toward the center, and is compressed and deformed by a strong force so as to be hardly inserted around the reinforcing bar. On the other hand, since the amount of deformation of the inner peripheral surface corresponding to the side of the polygon is small, the crimping force is weak. Due to the strength of the crimping force, a strong crimping force is obtained as a whole between the reinforcing bar and the sleeve. [0006] Second, a connection screw into which the connection bolt is screwed .
Since the female thread of the leave is provided with a female thread on the inner peripheral surface of the tubular material, the nominal diameter (outer diameter) of the connection bolt is necessarily larger than the diameter of the rebar. For this reason, the resistance to the tensile load acting on the connection bolts increases, and it is not necessary to use heat-treated products of chrome and molybdenum steel used in the conventional technology as bolt materials, and general structural steel is used. It is possible to do. Third, since the outer periphery of the area where the female thread portion of the connection sleeve is engraved is polygonal, a wrench such as a wrench is attached to two opposing sides during connection work at the construction site. By adjusting the distance, the rebar can be turned, so that the connection work at the construction site is facilitated. Next, an embodiment of the present invention will be described. FIG. 1 shows an example of an embodiment of the present invention, in which connection sleeves 3 and 4 are fixed to respective ends of a pair of deformed reinforcing bars 1 and 2 to be butt-connected, and female thread portions 3a and 3a of the respective sleeves. A stud-like connection bolt 5 is screwed into 4a to connect the two. [0009] Figure 2 shows a connection sleeve 4 fixed to one of the deformed bar 2 and the distal end, of the three <br/> Bed 4 tip (left end) from approximately 3 of the total length The female screw portion 4a is engraved to the position 1. The distal end of the deformed rebar 2 is inserted into the insertion hole 4b of the rebar having the same inner diameter as the internal thread 4a, and the area where the rebar is inserted is compressed and deformed from the outer periphery toward the center. I have. Next, with respect to the joint structure of the present invention, steps from production of the connection sleeves 3 and 4 to connection of the deformed reinforcing bars 1 and 2 will be described. As the material of the sleeve,
A circular steel pipe is formed into a tubular material having a hexagonal outer periphery and a circular inner periphery by drawing. This tubular material is cut to a predetermined length, and an internal thread is cut from one end thereof to a predetermined length range, so that a sleeve member 1 as shown in FIG.
3 is assumed. In the figure, the inner diameter of the female screw portion 13a is made to be the same as the inner diameter of the insertion hole portion 13b of the deformed reinforcing bar, so that it is not necessary to drill a pilot hole for the female screw. Female thread part 1
3a is engraved by tapping or the like in a range of about one third of the entire length from one end of the sleeve member. [0011] Next, the finished insertion of the sleeve member 13
To inserting the distal end portion of the deformed bar 1 in use hole 13b. As is well known, on the outer circumference of the deformed bars 1, since the ridges (distrust) 1a for retaining as shown in FIG. 4 are provided, the inner diameter of the diameter and the hole of the portion where the protrusion is provided The size of the hole is determined so as to correspond to. That is, insert the tip of the reinforcing bar 1
This is so that it can be lightly pressed into the wearing hole 13b.
All clauses to adjust the inner diameter of the hole 13b of. [0012] Next, as shown in FIG. 4, while inserting the sleeve member 13 to the distal end portion of the reinforcing bar 1, exerts a compressive force from both above and below by using a mold 6 of the press from the periphery of the sleeve member By crimping the corner 13c, both are pressed. The mold 6 is provided with semi-circular grooves 6a, 6a in the longitudinal direction in two dies. The sleeve member 13 is provided in these grooves 6a.
The sleeve member is sent so as to surround the area to be crimped, and a force is applied to the die from above and below so that the sleeve member can be deformed. [0013] groove 6a of the mold 6, when a force in the outer periphery of the sleeve member 13 by 6a, the inner peripheral surface of the groove,
Initially, a force is applied only to the corners 13a on the outer periphery of the sleeve member to deform the sleeve member so as to be crushed toward the center. As a result, the inner surface of the insertion hole 13b of the sleeve member 13 projects inward so that the inside of the deformed corner 13c bulges, so that the outer periphery of the reinforcing bar 1 is inserted into the inner surface. When a force is further applied to the die, the corner 13c of the sleeve member 13 is crushed and the outer periphery is deformed into a substantially circular shape, and the inner peripheral surface is brought into a state of being pressed against the outer periphery of the reinforcing bar 1. In this crimping, as described above, the corner portion 13c of the sleeve member is largely deformed toward the center, so that the crimping force at this portion is increased. On the other hand, since the deformation amount of each side is small, the pressing force is weak, and when viewed as a whole, it is in a strong and weak distribution state of a wave shape, and the whole is a large pressing force. I have. It should be noted that the outer periphery of the area where the internal thread portion 13a of the sleeve member 13 is engraved is maintained in a hexagonal shape because there is no deformation by the die. The sleeve member 13 thus deformed and fixed to the tip of the reinforcing bar is the connection sleeve 4 shown in FIG. Next, a description will be given of a connection procedure of the reinforcing bars by the joint structure of the reinforcing bars according to the present invention. As is well known, deformed reinforcing bars
In the construction site of a reinforced concrete structure, 1 , 2 and 3 are arranged in advance vertically and horizontally and vertically, and the ends of the reinforcing bars are butt-connected to each other. This connection is performed by the joint structure according to the present invention. It can be easily performed by adopting it. First, one reinforcing bar 1 having one connecting sleeve 3 fixed to the tip is fixedly installed at a construction site. Then screwed connection bolt 5 shown to office fixed length on one of the female screw portion 3a of the connecting Sri <br/> over Bed 3 in FIG. Screwing depth of the connecting bolt 5, the bolt is screwed deeper until it stops in the female screw portion 3a, so that sufficient bonding strength can be obtained.
Next, the connection sleeve 4 of the rebar 2 of the other party is aligned, and the internal thread of this sleeve is screwed into the connection bolt 5. This screwing is performed by rotating the reinforcing bar 2 of the other party. The rotation of the reinforcing bar 2 on the other side may be performed by applying a torque by applying a large spanner to a hexagonal portion of the outer periphery of the connection sleeve 4. The rotation of the rebar 2 may be applied with a torque by a torque wrench or other tools. Since the connecting operation uses the hexagonal portion of the sleeve to rotate the reinforcing bar, a large torque can be easily obtained, and there is an advantage that the connecting operation is extremely easy. In the above invention, the polygon of the sleeve is described as a hexagon, but this may be a square or an octagon. In addition, as for the form of connection of the rebar by the sleeve, in addition to the connection by rotating one of the rebars as described above, the connection bolt is made into a right-hand screw and a left-hand screw by half, and the connection is made by rotating the bolt. In some cases, the bolt is screwed deeply, then the sleeve of the other party is approached, the bolt is unscrewed and screwed to the other party, and the locking nut is used to prevent loosening. In these cases, by rotating the rebar itself have greens. In addition,
The present invention provides a strong crimping force and does not diminish the advantages of the present invention that enable the use of low quality bolts. Further, the present invention is applied to a case where the reinforcing bars are butt-connected with each other via connecting bolts.
As another means, it is also possible to connect without using this connection bolt. For example, in a factory, a sleeve member is fixed to the tip of one rebar in advance, and at the construction site, the tip of the other rebar is inserted from the other hole of the sleeve and crimped, so that the tip of each rebar is crimped. It is also possible to connect the parts by directly abutting each other. Strong connection force can be obtained by crushing and crimping polygonal corners, and it is not necessary to engrave connection bolts and female threads, and only one sleeve is required, so construction costs can be reduced. It has the following characteristics. According to the present invention, a sleeve member having a polygonal outer periphery and a circular inner periphery is used, the tip of a deformed reinforcing bar is inserted from one end, and the inserted portion is directed toward the center. Since the sleeve is crimped to the rebar by compressive deformation, the crimping strength is increased and a large coupling force is obtained. Also,
Since the inner diameter of the rebar insertion hole of the sleeve member and the inner diameter of the female thread are the same, the diameter of the connection bolt to be screwed into this female thread becomes larger, and it can withstand a tensile load equal to or greater than that of the deformed rebar. ing. As a result, it is not necessary to use a high-grade material such as chromium-molybdenum steel as in the prior art as a bolt material, which contributes to a reduction in construction cost. In addition,
Since the side of the polygonal side of the sleeve is suitable for directly applying a wrench or the like, the workability at the site can be improved.

【図面の簡単な説明】 【図1】本発明の要部を示す一部切欠断面図である。 【図2】異形鉄筋の先端にスリーブを固着してある状態
を示す断面図である。 【図3】スリーブ部材を示す断面図である。 【図4】鉄筋へのスリーブ部材の固着要領を示す斜視図
である。 【図5】接続ボルトの正面図である。 【図6】従来技術を示す一部切欠断面図である。 【符号の説明】 1,2 鉄筋 3,4 接続用スリーブ 3a,4a めねじ部 5 接続ボルト 13 スリーブ部材 13a めねじ部 13c 角部
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway sectional view showing a main part of the present invention. FIG. 2 is a cross-sectional view showing a state in which a sleeve is fixed to the tip of a deformed reinforcing bar. FIG. 3 is a sectional view showing a sleeve member. FIG. 4 is a perspective view showing a procedure for fixing a sleeve member to a reinforcing bar. FIG. 5 is a front view of a connection bolt. FIG. 6 is a partially cutaway sectional view showing a conventional technique. [Description of Signs] 1, 2 Reinforcing Bars 3, 4 Connection Sleeves 3a, 4a Female Thread 5 Connection Bolt 13 Sleeve Member 13a Female Thread 13c Corner

Claims (1)

(57)【特許請求の範囲】 【請求項1】 突き合わせ連結しようとする異形鉄筋の
各先端部にそれぞれ接続用スリーブを固着し、これらの
接続用スリーブの先端から所定長範囲に設けられため
ねじ部に接続ボルトをねじ込んで上記鉄筋同士を連結し
てなる鉄筋の継手構造において、 上記接続用スリーブは、外周を多角形に形成するととも
に内周を円形に形成してなる管状素材を所定長に切断
し、その一端部から所定長範囲にめねじ部を設けてスリ
ーブ部材とし、このスリーブ部材の上記めねじ部が設け
てない範囲に上記異形鉄筋の先端部を挿入し、上記異形
鉄筋が挿着してある範囲の上記多角形の角部を半径方向
に圧縮させることによって圧着の強弱を有する状態に該
異形鉄筋の外周に圧着してあることを特徴とする異形鉄
筋の継手構造。
(57) [Claims 1] A connecting sleeve is fixed to each end of a deformed reinforcing bar to be butt-connected, and is provided within a predetermined length from the end of each connecting sleeve. in the joint structure of the reinforcing bar formed by connecting the reinforcing bars to each other by screwing the connection bolt to the threaded portion, the connection sleeve is predetermined length tubular material obtained by forming an inner circumferential circular to form a periphery polygonal cut into, and the sleeve member provided with a female thread portion in a predetermined length range from one end portion, to insert the leading end portion of the deformed bar to a range in which the internal thread portion of the sleeve member is not provided, the deformed bar is A joint structure for a deformed reinforcing bar, characterized in that the polygonal corners in a range of the inserted reinforcing bars are compressed in the radial direction to be crimped to the outer periphery of the deformed reinforcing bar in a state having a strength of crimping.
JP30748896A 1996-11-05 1996-11-05 Rebar joint structure Expired - Lifetime JP3370245B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30748896A JP3370245B2 (en) 1996-11-05 1996-11-05 Rebar joint structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30748896A JP3370245B2 (en) 1996-11-05 1996-11-05 Rebar joint structure

Publications (2)

Publication Number Publication Date
JPH10131303A JPH10131303A (en) 1998-05-19
JP3370245B2 true JP3370245B2 (en) 2003-01-27

Family

ID=17969699

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30748896A Expired - Lifetime JP3370245B2 (en) 1996-11-05 1996-11-05 Rebar joint structure

Country Status (1)

Country Link
JP (1) JP3370245B2 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1327094C (en) * 2005-06-27 2007-07-18 浙江工业大学 Steel bar connector
KR100815173B1 (en) * 2007-04-23 2008-04-07 주식회사 동성엔지니어링 Apparatus for connecting reinforcing bars mechanically using one-touch type locking device
JP2012117341A (en) * 2010-12-03 2012-06-21 Fuji Bolt Seisakusho:Kk Mechanical joint
JP5847483B2 (en) * 2011-08-05 2016-01-20 株式会社デイ・シイ Bridge wall railing method
JP6035544B2 (en) * 2011-10-12 2016-11-30 株式会社富士ボルト製作所 Mechanical coupling
JP5236108B1 (en) 2011-12-21 2013-07-17 株式会社富士ボルト製作所 Forming method of crimp structure
JP5926982B2 (en) 2012-02-29 2016-05-25 東京鐵鋼株式会社 Rebar connection structure and rebar connection device
JP5926983B2 (en) 2012-02-29 2016-05-25 東京鐵鋼株式会社 Reinforcing bar connecting device and reinforcing bar connecting method
JP2015040444A (en) * 2013-08-23 2015-03-02 株式会社富士ボルト製作所 Joint structure for reinforcing bar and method for forming joint structure of reinforcing bar
CN103835441A (en) * 2014-01-23 2014-06-04 王睿敏 Rebar mechanical joint element used for precast reinforced concrete member and installing method thereof
CN103790236A (en) * 2014-02-17 2014-05-14 王睿敏 Connecting piece for connecting reinforced concrete members, manufacturing method of connecting piece and construction method
CN112431360A (en) * 2020-12-21 2021-03-02 郭京 Novel mechanical connecting sleeve for reinforcing steel bars

Also Published As

Publication number Publication date
JPH10131303A (en) 1998-05-19

Similar Documents

Publication Publication Date Title
JP3370245B2 (en) Rebar joint structure
AU2004202418B2 (en) Deformed Reinforcing Bar Splice and Method
US5909980A (en) Tubular coupler for concrete reinforcing bars
JP6689028B2 (en) Reinforcing bar joint method
JPH01295958A (en) Mechanical joining method of round steel for reinforcing concrete and said round steel and mechanical joint using round steel for reinforcing
TW440482B (en) Manufacture method for concrete-strengthening deformed reinforcement bar and its connecting ends
US5664902A (en) Tubular coupler for concrete reinforcing bars
WO2006039245A2 (en) Tubular coupler for concrete reinforcing bars
JP2001214574A (en) Connector for self-connection bar steel
EP0171965B1 (en) Method of providing connections for reinforcing bars and joint and connections for such bars
US5491941A (en) Slippage controlled threaded rebar joint in reinforced concrete
US20030000274A1 (en) Forging of workpieces
CN210152071U (en) Processing-free plug-in type reinforcing steel bar anchoring plate device
WO2009120153A1 (en) Method for working a thread on deformed reinforcing bar
JP2916416B2 (en) Shaped steel bar for reinforced concrete having joints, its joint, and method for forming joint of deformed steel bar for reinforced concrete
JP3225398B2 (en) One side bolt
TWM566738U (en) Connectable steel bar structure
JP5327779B2 (en) Reinforcing bar anchoring structure
JP3045670B2 (en) Rebar connection structure
JPS6322250Y2 (en)
JP3678358B2 (en) Reinforcing bar joint structure
KR100406140B1 (en) Taper thread coupler
JP3574698B2 (en) Lock nut
JPH1061105A (en) Reinforcing bar connecting construction
JPH0327125Y2 (en)

Legal Events

Date Code Title Description
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20021008

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20081115

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20091115

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20101115

Year of fee payment: 8

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111115

Year of fee payment: 9

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121115

Year of fee payment: 10

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131115

Year of fee payment: 11

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term