JPS6282152A - Method for connecting steel bar and joint jig used therein - Google Patents
Method for connecting steel bar and joint jig used thereinInfo
- Publication number
- JPS6282152A JPS6282152A JP22392385A JP22392385A JPS6282152A JP S6282152 A JPS6282152 A JP S6282152A JP 22392385 A JP22392385 A JP 22392385A JP 22392385 A JP22392385 A JP 22392385A JP S6282152 A JPS6282152 A JP S6282152A
- Authority
- JP
- Japan
- Prior art keywords
- diameter
- shape memory
- reinforcing bars
- memory metal
- main body
- 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.)
- Pending
Links
Landscapes
- Reinforcement Elements For Buildings (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（ａ）、産業上の利用分野
本発明はコンクリートの補強部材である鉄筋の接続方法
およびそれに使用する継手金具に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method for connecting reinforcing bars, which are reinforcing members for concrete, and a joint fitting used therein.
（ｂ）、従来の技術
従来、鉄筋の接続は、■鉄筋と鉄筋を所定長さに亙り重
ねてた形で接続する、重ね継手による方法、■圧接によ
り溶融接続する方法、■鉄筋間に接続金具を設け、該金
具を加圧して鉄筋と共に塑性変形させて係合させたり、
金具内部にモルタルを充填して接続する方法等が有る。(b), Conventional technology Traditionally, reinforcing bars have been connected using: ■ a lap joint, in which reinforcing bars are connected over a predetermined length, ■ a fusion connection by pressure welding, and ■ a connection between reinforcing bars. A metal fitting is provided, and the metal fitting is pressurized to plastically deform and engage with the reinforcing steel,
There are methods to connect by filling mortar inside the fittings.
（Ｃ）０発明が解決しようとする問題点しかし、■の方
法は、鉄筋を重ねる分だけ余分な鉄筋が必要となり、ま
た鉄筋の径が太くなると継手性能に不安が残る欠点が有
る。■の方法は、鉄筋を加熱溶融させるために、雨風等
天候の状況で作業が出来なかったり、火災の危険性が有
り、十分な注意を必要とする不都合が有る。■の方法は
、確実に両鉄筋が接続されているか否かの確認がむずか
しい欠点がある。(C) 0 Problems to be Solved by the Invention However, the method (2) requires extra reinforcing bars for the overlap of the reinforcing bars, and also has the disadvantage that joint performance remains unsatisfactory as the diameter of the reinforcing bars increases. Method (2) has the inconvenience of heating and melting the reinforcing bars, making it impossible to work in weather conditions such as rain and wind, and the risk of fire, requiring sufficient caution. Method (2) has the disadvantage that it is difficult to confirm whether or not both reinforcing bars are reliably connected.
本発明は、前述の欠点を解消すべく、余分な重ね長さが
不要で、鉄筋の径にかかわらず接続が出来、天候に影響
されず、しかも火災の危険性が無く、確実に鉄筋を接続
する乙とが出来る鉄筋の接続方法およびそれに使用する
継手金具を提供することを目的とするものである。In order to eliminate the above-mentioned drawbacks, the present invention eliminates the need for extra overlap length, allows connections regardless of the diameter of the reinforcing bars, is unaffected by weather, and has no risk of fire, and reliably connects reinforcing bars. The purpose of this invention is to provide a method for connecting reinforcing bars that can be used with other people, as well as fittings for use in the method.
（ｄ）９問題点を解決するための手段
即ち、本発明の内、鉄筋の接続方法の発明はは、形状記
憶金属からなる本体（２）を有し、該本体（２）に接続
穴（２ａ）を、前記形状記憶金属の変態点温度以上の状
態で接続すべき鉄筋（３，３′）の直径（Ｄ３）よりも
小なる直径（Ｄ２）に形成した継手金具（１）を用い、
鉄筋（３，３゛）の接続に際しては、前記継手金具（１
）を前記形状記憶金属の変態点温度以下に冷却した状態
で、前記接続穴（２ａ）の直径を接続すべき鉄筋（３，
３”）の直径（Ｄ３）よりも大なる直径（Ｄｌ）に変形
させ、その状態で接続すべき鉄筋（３，３’）の両端を
前記接続穴（２ａ）に挿入し、その後、継手金具（１）
の温度を前記形状記憶金属の変態点温度以上の状態に戻
し、前記形状記憶金属の形状記憶効果により、接続穴（
２ａ）の直径が接続すべき鉄筋（３，３′）の直径（Ｄ
３）よ咳も小なる直径（Ｄ２）に収縮することにより、
鉄筋（３，３′）の接続を行うようにして構成される。(d) Means for solving the nine problems, that is, the invention of the reinforcing bar connection method of the present invention has a main body (2) made of shape memory metal, and the main body (2) has connection holes ( 2a) using a joint fitting (1) formed to have a diameter (D2) smaller than the diameter (D3) of the reinforcing bars (3, 3') to be connected at a temperature higher than the transformation point temperature of the shape memory metal,
When connecting the reinforcing bars (3,3゛), use the above-mentioned joint fittings (1
) is cooled to below the transformation point temperature of the shape memory metal, and the diameter of the connection hole (2a) is connected to the reinforcing bar (3,
3") to a diameter (Dl) larger than the diameter (D3) of the reinforcing bar (3, 3'), and in that state insert both ends of the reinforcing bar (3, 3') to be connected into the connection hole (2a), and then insert the joint fitting. (1)
The temperature of the shape memory metal is returned to a state equal to or higher than the transformation point temperature of the shape memory metal, and due to the shape memory effect of the shape memory metal, the connection hole (
The diameter of 2a) is the diameter (D) of reinforcing bars (3, 3') to be connected.
3) By constricting the cough to a smaller diameter (D2),
It is configured to connect reinforcing bars (3, 3').
また、本発明の内、継手金具の発明は、形状記憶金属か
らなる本体（２）を有し、該本体（２）に接続穴（２ａ
）を、前記形状記憶金属の変態点１度以上の状態で接続
すべき鉄筋（３，３′）の直径（Ｄ３）よりも小なる直
径（Ｄ２）に形成して構成される。Moreover, among the present invention, the invention of the joint fitting has a main body (2) made of shape memory metal, and the main body (2) has a connection hole (2a).
) is formed to have a smaller diameter (D2) than the diameter (D3) of the reinforcing bars (3, 3') to be connected in a state where the transformation point of the shape memory metal is 1 degree or more.
なお、括弧内の番号及び記号は、図面における対応する
要素を示す、便宜的なものであり、従って、本記述は図
面上の記載に限定拘束されるものではない。以下のｒ
（ｅｌ 、作用」の欄についても同様である。Note that the numbers and symbols in parentheses are for convenience and indicate corresponding elements in the drawings, and therefore, this description is not limited to the descriptions in the drawings. r below
The same applies to the column "(el, action").
（ｅ）１作用
上記した構成により、本発明は、継手金具（１）を変態
点温度以下に冷却した状態で、接続穴（２ａ）を接続す
べき鉄筋（３，３′）の直径（Ｄ３）よりも拡大させ、
その状態て鉄筋（３，３′）を接続穴（２ａ）中に挿入
して変態点温度以上の常温状態に戻すと、接続穴（２ａ
）が形状記憶効果により収縮して鉄筋（３１，３′）は
継手金具（１）を介して接続されるように作用する。(e) 1 Effect With the above-described configuration, the present invention provides the diameter (D3 ),
In this state, reinforcing bars (3, 3') are inserted into the connection hole (2a) and returned to normal temperature above the transformation point temperature.
) contracts due to the shape memory effect, and the reinforcing bars (31, 3') act to be connected via the joint fitting (1).
（ｆ）、実施例 以下、本発明の実施例を図面に基づき説明する。(f), Example Embodiments of the present invention will be described below based on the drawings.
第１図は本発明による継手金具の一例を示す斜視図、
第２図及び第３図は第１図の継手金具の変形態様を示す
斜視図である。FIG. 1 is a perspective view showing an example of a joint fitting according to the present invention, and FIGS. 2 and 3 are perspective views showing modifications of the joint fitting shown in FIG. 1.
継手金具１は、第１図に示すように、Ｎｉ−丁１合金等
の形状記憶金属により円筒状に形成された本体２を有し
ており、本体２には該本体２を軸心方向に貫通する形で
接続穴２ａが設けられている。接続穴２ａの直径は、常
温下、即ち、当該形状記憶金属の変態点温度以上の状態
においては、第３図に示すように、接続すべき鉄筋３．
３′の直径Ｄ３よりもやや小さいＤ２に形成されており
、更に本体２の側面中央部には、第１図に示すように、
接続確認用の穴２ｂが、接続穴２ａに貫通する形で穿設
されている。As shown in FIG. 1, the joint fitting 1 has a cylindrical main body 2 made of shape memory metal such as Ni-D1 alloy. A connecting hole 2a is provided in a penetrating manner. As shown in FIG. 3, the diameter of the connecting hole 2a is determined by the diameter of the reinforcing bar 3.
The diameter D2 is slightly smaller than the diameter D3 of the main body 2, and as shown in FIG.
A hole 2b for connection confirmation is bored through the connection hole 2a.
継手金具１は、以上のような構成を有するので、鉄筋３
．３′を接続する場合には、まず継手金具１を形状記憶
金属の変態点以下の温度に冷却し、その状態で接続穴２
ａの直径をＤ２から、鉄筋３．３′の直径Ｄ３よりも大
きなり１に塑性変形させる。その後、継手金具１を冷却
させたままの状態で、第１図に示すように、接続すべき
鉄筋３．３′の両端を、接続穴２ａに挿入し、その先端
３ａ、３ａ”を穴２ｂ部分、即ち接続穴２ａの中央部で
当接させる。接続穴２ａの直径は鉄筋３．３′の直径Ｄ
３よりも大きく変形させられているので、鉄筋３．３′
の接続穴２ａへの挿入は円滑に行われる。作業者は、穴
２ｂを介して両鉄筋３．３′の当接を確認したところで
、鉄筋３．３′および継手金具１部分を常温に戻す。す
ると、継手金具１を構成する形状記憶金属は、それまで
の変態点温度以下の状態から変態点温度以上の状態に戻
り、変態点以下の状態で直径がＤｌに変形させられてい
た継手金具１は、変形以前の状態、即ち直径がＤ２ （
＜Ｄ３）の状態に戻り、鉄筋３．３′をその接続穴２ａ
中に確実保持し、鉄筋３．３′の接続は完了する。Since the joint fitting 1 has the above configuration, the reinforcing bar 3
．． 3', first cool the fitting 1 to a temperature below the transformation point of the shape memory metal, and in that state connect the connecting hole 2.
The diameter of a is plastically deformed from D2 to 1, which is larger than the diameter D3 of the reinforcing bar 3.3'. Thereafter, while the fitting 1 remains cooled, as shown in FIG. The diameter of the connecting hole 2a is equal to the diameter D of the reinforcing bar 3.3'.
Since the reinforcing bar is deformed more than 3, the reinforcing bar 3.3'
can be smoothly inserted into the connection hole 2a. After confirming that the reinforcing bars 3.3' are in contact with each other through the hole 2b, the operator returns the reinforcing bars 3.3' and the fitting 1 portion to room temperature. Then, the shape memory metal constituting the joint fitting 1 returns from the state below the transformation point temperature to the state above the transformation point temperature, and the fitting fitting 1 whose diameter was deformed to Dl in the state below the transformation point is in the state before deformation, that is, the diameter is D2 (
<D3) Return to the state and insert the reinforcing bar 3.3' into its connection hole 2a.
The connection of the reinforcing bars 3.3' is completed.
なお、上述の実施例は、継手金具１の本体２が円筒形に
形成されている場合について述べたが、本体２は、筒状
に形成されているかぎり、多角形状、４角形状等どのよ
うな形状であってもよいことは勿論である。In the above embodiments, the main body 2 of the fitting 1 is formed in a cylindrical shape, but the main body 2 can be formed in any shape such as a polygonal shape or a quadrangular shape as long as it is formed in a cylindrical shape. Of course, it may have any shape.
また、本体２を構成する形状記憶金属としては、Ｎｉ−
Ｔｉ合金の他に、変態点温度を境に形状記憶効果を発揮
し得る金属であればどのようなものでもよい。更に、接
続すべき鉄筋３．３′の直径Ｄ３が違っていてもそのお
のおのの鉄筋３．３′に対応する直径Ｄ１、Ｄ２となる
ように、本体２の接続穴２ａを形成して構成することも
可能である。Further, as the shape memory metal constituting the main body 2, Ni-
In addition to the Ti alloy, any metal can be used as long as it can exhibit a shape memory effect at a transformation point temperature. Furthermore, even if the diameters D3 of the reinforcing bars 3.3' to be connected are different, the connecting holes 2a of the main body 2 are formed so that the diameters D1 and D2 correspond to the respective reinforcing bars 3.3'. It is also possible.
（ｇ）０発明の効果
以上、説明したように、本発明によれば、形状記憶金属
からなる本体２を有し、該本体２に接続穴２ａを、前記
形状記憶金属の変態点温度以上の状態で接続すべき鉄筋
３．３′の直径Ｄ３よりも小なる直径Ｄ２に形成した継
手金具１を用い、鉄筋３．３′の接続に際しては、前記
継手金具１を前記形状記憶金属の変態点温度以下に冷却
した状態で、前記接続穴２ａの直径を接続すべき鉄筋３
．３′の直径Ｄ３よりも大なる直径Ｄ１に変形させ、そ
の状態で接続すべき鉄筋３．３′の両端を前記接続穴２
ａに挿入し、その後、継手金具１の温度を前記形状記憶
金属の変態点温度以上の状態に戻し、前記形状記憶金属
の形状記憶効果により、接続穴２ａの直径が接続すべき
鉄筋３．３ゝの直径Ｄ３よりも小なる直径Ｄ２に収縮す
ることにより、鉄筋３．３′の接続を行うようにして構
成したので、鉄筋３．３′の接続に際して、余分な重ね
長さ分が不要となり、経済的な接続が出来るばかりか、
溶着のように加熱の必要も無いので、天候に左右されず
火災の危険性も無くすことが出来る。更に、接続穴２ａ
の収縮により鉄筋３．３′が保持されるので、鉄筋３．
３′の接続は確実に行うことが出来るばかりか、鉄筋３
．３′の直径が大きくなっても、接続穴２ａの径を変え
るだけで容易に対応が可能であり、汎用性に富む。(g) 0 Effects of the Invention As explained above, according to the present invention, the main body 2 is made of a shape memory metal, and the connection hole 2a is formed in the main body 2 at a temperature higher than the transformation point temperature of the shape memory metal. When connecting the reinforcing bars 3.3', the coupling fittings 1 are formed to have a diameter D2 smaller than the diameter D3 of the reinforcing bars 3.3' to be connected in the above-mentioned condition. In a state where the diameter of the connection hole 2a is cooled to below the temperature, the reinforcing bar 3 to be connected is
．． 3' to have a diameter D1 larger than the diameter D3 of the reinforcing bar 3.3' to be connected in that state.
After that, the temperature of the joint fitting 1 is returned to a state equal to or higher than the transformation point temperature of the shape memory metal, and due to the shape memory effect of the shape memory metal, the diameter of the connection hole 2a changes to the reinforcing bar 3.3 to be connected. Since the reinforcing bars 3.3' are connected by contracting to a diameter D2 smaller than the diameter D3 of the reinforcing bars 3.3', an extra overlap length is not required when connecting the reinforcing bars 3.3'. , not only can economic connections be made,
Unlike welding, there is no need for heating, so it is unaffected by the weather and eliminates the risk of fire. Furthermore, connection hole 2a
The contraction of reinforcing bar 3.3' holds the reinforcing bar 3.3'.
Not only can the connection of 3' be made reliably, but also the reinforcing bar 3
．． Even if the diameter of the connecting hole 2a becomes larger, it can be easily accommodated by simply changing the diameter of the connecting hole 2a, which is highly versatile.
また、継手金具１を、形状記憶金属からなる本体２を有
し、該本体２に接続穴２ａを、前記形状記憶金属の変態
点温度以上の状態で接続すべき鉄筋３．３′の直径Ｄ３
よりも小なる直径Ｄ２に形成して構成すると、上記した
鉄筋３．３′の接続が可能となり、極めて有効である。Further, the joint fitting 1 has a main body 2 made of a shape memory metal, and the connecting hole 2a is connected to the main body 2 in a diameter D3 of a reinforcing bar 3.3' to be connected at a temperature equal to or higher than the transformation point temperature of the shape memory metal.
If the diameter D2 is smaller than the diameter D2, the reinforcing bars 3 and 3' described above can be connected, which is extremely effective.
第１図は本発明による継手金具の一例を示す斜視図、
第２図及び第３図は第１図の継手金具の変形態様を示す
斜視図である。
１・・・・・・継手金具
２・・・・・・本体
２ａ・・・・・・接続穴・
３．３′・・・・・・鉄筋
Ｄｌ、Ｄ２、Ｄ３・・・・・・直径
出願人 三井建設株式会社
代理人 弁理士 相１）伸二
第１図
１４：区手金具
第２図
第３図
１ 絶子企具FIG. 1 is a perspective view showing an example of a joint fitting according to the present invention, and FIGS. 2 and 3 are perspective views showing modifications of the joint fitting shown in FIG. 1. 1...Joint fittings 2...Body 2a...Connection hole 3.3'...Reinforcement bars Dl, D2, D3...Diameter Applicant Mitsui Construction Co., Ltd. Agent Patent Attorney Ai 1) Shinji Fig. 1 14: Kutte Kanagu Fig. 2 Fig. 3 1 Zeshi Kikagu
Claims (2)
続穴を、前記形状記憶金属の変態点温度以上の状態で接
続すべき鉄筋の直径よりも小なる直径に形成した継手金
具を用い、鉄筋の接続に際しては、前記継手金具を前記
形状記憶金属の変態点温度以下に冷却した状態で、前記
接続穴の直径を接続すべき鉄筋の直径よりも大なる直径
に変形させ、 その状態で接続すべき鉄筋の両端を前記接続穴に挿入し
、 その後、継手金具の温度を前記形状記憶金属の変態点温
度以上の状態に戻し、 前記形状記憶金属の形状記憶効果により、 前記接続穴の直径が接続すべき鉄筋の直径よりも小なる
直径に収縮することにより、前記鉄筋の接続を行うよう
にして構成した鉄筋の接続方法。(1) A joint fitting having a main body made of a shape memory metal, and a connection hole formed in the main body to a diameter smaller than the diameter of the reinforcing bar to be connected at a temperature higher than the transformation point temperature of the shape memory metal. When connecting reinforcing bars, the diameter of the connection hole is deformed to a diameter larger than the diameter of the reinforcing bar to be connected, with the joint fitting cooled to below the transformation point temperature of the shape memory metal, and in that state. Insert both ends of the reinforcing bars to be connected into the connection hole, then return the temperature of the joint fitting to a state equal to or higher than the transformation point temperature of the shape memory metal, and due to the shape memory effect of the shape memory metal, the connection hole A method for connecting reinforcing bars, wherein the reinforcing bars are connected by shrinking the reinforcing bars to a diameter smaller than that of the reinforcing bars to be connected.
続穴を、前記形状記憶金属の変態点温度以上の状態で接
続すべき鉄筋の直径よりも小なる直径に形成して構成し
た継手金具。(2) The main body is made of a shape memory metal, and the connection hole is formed in the main body to have a diameter smaller than that of the reinforcing bar to be connected at a temperature higher than the transformation point temperature of the shape memory metal. Fittings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22392385A JPS6282152A (en) | 1985-10-08 | 1985-10-08 | Method for connecting steel bar and joint jig used therein |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22392385A JPS6282152A (en) | 1985-10-08 | 1985-10-08 | Method for connecting steel bar and joint jig used therein |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6282152A true JPS6282152A (en) | 1987-04-15 |
Family
ID=16805829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22392385A Pending JPS6282152A (en) | 1985-10-08 | 1985-10-08 | Method for connecting steel bar and joint jig used therein |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6282152A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6462544A (en) * | 1987-08-31 | 1989-03-09 | Toda Construction | Method of reinforcing and clamping construction of rc structure |
| JPH04111813U (en) * | 1991-03-15 | 1992-09-29 | 戸田建設株式会社 | Rebar joint device |
| JPH0510314A (en) * | 1991-07-02 | 1993-01-19 | Nippon Steel Corp | Clamping method and device |
-
1985
- 1985-10-08 JP JP22392385A patent/JPS6282152A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6462544A (en) * | 1987-08-31 | 1989-03-09 | Toda Construction | Method of reinforcing and clamping construction of rc structure |
| JPH04111813U (en) * | 1991-03-15 | 1992-09-29 | 戸田建設株式会社 | Rebar joint device |
| JPH0510314A (en) * | 1991-07-02 | 1993-01-19 | Nippon Steel Corp | Clamping method and device |
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