JPH08215892A - Steel sleeve for weld joint of reinforcement - Google Patents
Steel sleeve for weld joint of reinforcementInfo
- Publication number
- JPH08215892A JPH08215892A JP2701695A JP2701695A JPH08215892A JP H08215892 A JPH08215892 A JP H08215892A JP 2701695 A JP2701695 A JP 2701695A JP 2701695 A JP2701695 A JP 2701695A JP H08215892 A JPH08215892 A JP H08215892A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- weld metal
- steel sleeve
- tubular body
- metal receiver
- 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
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、鉄筋と鉄筋をガスシー
ルドアーク溶接で接合する際に使用する鋼製スリーブに
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel sleeve used for joining reinforcing bars to each other by gas shielded arc welding.
【0002】[0002]
【従来の技術】鉄筋を接合する方法は、ガス圧接,溶接
継手および機械継手等による方法がある。前記の溶接継
手による方法としては、特公昭47−18403号公報
にある、条材(鉄筋)の開先部と同形またはこれと近似
形状の切り欠き孔を有する鋼製スリーブ(図6a,b)
を用いて被覆アーク溶接棒で溶接する方法。また、特公
平4−20796号公報に、鉄筋を銅製当金で囲み、該
当金上部からシールドガスを流してガスメタルエンクロ
ーズで溶接するとともに接合面の縁部側の所定の範囲の
領域で溶接入熱を低下して溶接する方法。さらに特開平
3−35897号公報にセラミックスバッキング材を使
用して溶接する方法などがある。2. Description of the Related Art As a method of joining reinforcing bars, there are methods such as gas pressure welding, welding joints and mechanical joints. As a method using the above-mentioned welded joint, a steel sleeve having a notch hole having the same shape as or a similar shape to the groove portion of the strip (reinforcing bar) described in JP-B-47-18403 (Figs. 6a and 6b).
Welding with a covered arc welding rod using. Further, in Japanese Examined Patent Publication No. 4-20796, a reinforcing bar is surrounded by a copper metal, a shielding gas is caused to flow from the upper part of the gold and welded by a gas metal enclosure, and a welding is performed in a predetermined area on the edge side of the joint surface. A method of welding by reducing the heat input. Further, Japanese Patent Laid-Open No. 3-35897 discloses a method of welding using a ceramic backing material.
【0003】しかし、近年鉄筋コンクリート構造物は益
々高層化,大型化しており、これに適用される鉄筋も太
径化,高張力化し、より高能率な溶接方法が求められて
いる。この要望に対して、前記特公昭47−8403号
公報に記載の被覆アーク溶接棒による施工では溶接能率
が非常に悪い。また、この図6(a,b)に示す鋼製ス
リーブを用いて高い溶着量の得られるガスシールドアー
ク溶接方法で接合すると、溶接時切り欠孔7より溶接金
属が溶け落ちてしまう。溶接金属が溶け落ちないように
溶接電流を低くすると被覆アーク溶接棒による溶接施工
と同様能率が悪くなる。However, in recent years, reinforced concrete structures have become higher and larger in size, and the reinforcing bars applied thereto have a larger diameter and higher tensile strength, and a more efficient welding method is required. In response to this demand, the welding efficiency is extremely poor in the construction using the covered arc welding rod described in JP-B-47-8403. Further, when the steel sleeves shown in FIGS. 6A and 6B are used to join by a gas shield arc welding method that can obtain a high welding amount, the weld metal will be burned down from the cutout holes 7 during welding. If the welding current is lowered so that the weld metal does not melt down, the efficiency is deteriorated as in the case of welding with a covered arc welding rod.
【0004】また、特公平4−20706号公報にある
銅当金を用いてガスシールドアーク溶接(ガスエンクロ
ーズ溶接)する方法では、溶接時間は短いが、銅当金の
セットに時間を要するとともに溶接入熱量を制御する装
置も必要となりコスト面でも問題となる。さらに、特開
平3−35897号公報にあるセラミックバッキング材
を用いてガスシールドアーク溶接を行うと、セラミック
材が通電しないのでアークの起動が阻害されたり溶接中
アークが不安定となって溶接欠陥が生じ易くなる。Further, in the method of gas shielded arc welding (gas-enclosed welding) using a copper alloy in Japanese Patent Publication No. 4-20706, the welding time is short, but it takes time to set the copper alloy. A device for controlling the amount of welding heat input is also required, which causes a problem in terms of cost. Furthermore, when gas shielded arc welding is performed using the ceramic backing material disclosed in JP-A-3-35897, the ceramic material is not energized, which hinders the starting of the arc or makes the arc unstable during welding, resulting in welding defects. It tends to occur.
【0005】[0005]
【発明が解決しようとする課題】本発明は、鉄筋の溶
接、特にガスシールドアーク溶接方法での溶接施工にお
いて、簡便でかつ溶接金属が溶け落ちたり溶接欠陥が生
じない溶接継手用鋼製スリーブを提供することを目的と
する。DISCLOSURE OF THE INVENTION The present invention provides a steel sleeve for a welded joint, which is simple and does not cause weld metal burn-through or welding defects in the welding of reinforcing bars, especially in the gas shielded arc welding method. The purpose is to provide.
【0006】[0006]
【課題を解決するための手段】本発明の要旨とするとこ
ろは、鉄筋の溶接継手用鋼製スリーブにおいて、管状体
の中央部に開口部を設け、該開口部に溶接金属受けが前
記管状体と一体に設けられるとともに、管状体と溶接金
属受けの間に切り込み溝を有して、該溶接金属受けはU
形に開口していることを特徴とする。また、溶接金属受
けは垂直方向に対して外側に0〜30°U型に開口して
いることも特徴とする。SUMMARY OF THE INVENTION A gist of the present invention is to provide a steel sleeve for a welded joint of a reinforcing bar with an opening at the center of the tubular body, and the weld metal receiver is provided in the opening at the tubular body. And a notch groove between the tubular body and the weld metal receiver.
It is characterized by having an opening in shape. Further, the weld metal receiver is also characterized in that it is opened in a 0 to 30 ° U shape outward with respect to the vertical direction.
【0007】[0007]
【作用】図1に本発明の鋼製スリーブの例を斜視図で、
また図2(a)、図3(a)および図4(a,b)に正
面図を示す。図2(b)は図2(a)のA−A断面、図
3(b)は図2(a)のB−B断面である。また、図5
は本発明の鋼製スリーブに鉄筋を挿入した場合の例を示
す。FIG. 1 is a perspective view showing an example of the steel sleeve of the present invention.
2 (a), 3 (a) and 4 (a, b) are front views. 2B is a cross section taken along the line AA of FIG. 2A, and FIG. 3B is a cross section taken along the line BB of FIG. 2A. Also, FIG.
Shows an example of the case where a reinforcing bar is inserted in the steel sleeve of the present invention.
【0008】鋼製スリーブは、管状体1の中央部に開口
部2を設け、開口部2に溶接金属受け3が管状体1と一
体に設けられている。また、管状体1と溶接金属受け3
との間に切り込み溝4を有して、溶接金属受け3はU形
に開口している。溶接金属受け3が、溶接時に溶接金属
をせき止めるので溶け落ちることがない。溶接金属受け
3は、U形で垂直方向に対して0〜30°外側に開口し
ているので溶接時ウイービングが可能となり、鉄筋5お
よび溶接金属受け3共に十分溶け込みが得られるので、
融合不良等の溶接欠陥がなく、強度および延性の優れた
接合部が得られる。In the steel sleeve, an opening 2 is provided in the center of the tubular body 1, and a weld metal receiver 3 is integrally provided with the tubular body 1 in the opening 2. Further, the tubular body 1 and the weld metal receiver 3
The weld metal receiver 3 has a U-shaped opening with a notch groove 4 between and. Since the weld metal receiver 3 blocks the weld metal during welding, it does not melt down. Since the weld metal receiver 3 is U-shaped and is open to the outside by 0 to 30 ° with respect to the vertical direction, weaving is possible during welding, and both the reinforcing bar 5 and the weld metal receiver 3 are sufficiently melted.
A welded portion having excellent strength and ductility can be obtained without welding defects such as poor fusion.
【0009】さらに、開口部2が溶接金属受け3と鉄筋
5とに囲まれているので、溶接中のガスシールド性が良
好となって、空気の巻き込みに起因するピットやブロホ
ールなどの溶接欠陥の発生がない。また、シールド性が
良好であるので、シールドガスを別途溶接ノズル以外か
ら開口部2へ送ることが可能で、この場合ウイービング
幅を大きくでき、さらに良好な接合部が得られる。Further, since the opening 2 is surrounded by the weld metal receiver 3 and the reinforcing bar 5, the gas shielding property during welding is improved, and welding defects such as pits and blowholes caused by the entrainment of air occur. There is no occurrence. Further, since the shielding property is good, it is possible to separately send the shielding gas to the opening 2 from other than the welding nozzle, and in this case, the weaving width can be increased, and a better joint can be obtained.
【0010】溶接金属受け3が、U形で垂直方向に開口
している角度が0°未満であると、シールドガスを別途
溶接ノズル以外から開口部2へ送ったとしても、溶接時
トーチのウイービング幅が制限されるので、鉄筋5およ
び溶接金属受け3共に十分溶け込みが得られず、融合不
良等の溶接欠陥が生じる。また、30°を超えると溶接
金属が切り込み溝4と溶接金属受け3の間から溶け落ち
るとともに、ガスシールド性が悪くなりピットやブロホ
ールなどの溶接欠陥が生じるようになる。さらに、開口
部が大きくなるので、溶接に長時間を要し能率が悪くな
る。なお、溶接金属受け3の高さは挿入する鉄筋の高さ
程度であることが好ましい。If the angle at which the weld metal receiver 3 is U-shaped and vertically opened is less than 0 °, the weaving of the torch during welding is performed even if the shield gas is separately sent to the opening 2 from other than the welding nozzle. Since the width is limited, sufficient penetration cannot be obtained in both the reinforcing bar 5 and the weld metal receiver 3, and welding defects such as poor fusion occur. On the other hand, when the angle exceeds 30 °, the weld metal melts down between the cut groove 4 and the weld metal receiver 3, and the gas shield property is deteriorated to cause welding defects such as pits and blow holes. Furthermore, since the opening becomes large, it takes a long time for welding and the efficiency becomes poor. The height of the weld metal receiver 3 is preferably about the height of the reinforcing bar to be inserted.
【0011】さらに、図3(b)に示すように管状体1
に幅5〜15mm程度の割溝6を設ければ、鋼製スリーブ
へ鉄筋5を挿入する時に左右の鉄筋の位置が目視できる
ので、鉄筋の位置合わせが容易となる。本発明の鋼製ス
リーブは、管状体内径が鉄筋外径より3〜10mm程度大
きく、長さ50〜120mm、管状体肉厚4〜12mm、溶
接金属受け幅(切り込み溝幅)は挿入する鉄筋の開先幅
と同等か50mm程度広いことが好ましい。Further, as shown in FIG. 3 (b), the tubular body 1
If the split groove 6 having a width of about 5 to 15 mm is provided, the positions of the left and right reinforcing bars can be visually checked when the reinforcing bar 5 is inserted into the steel sleeve, which facilitates the positioning of the reinforcing bars. In the steel sleeve of the present invention, the tubular body inner diameter is about 3 to 10 mm larger than the rebar outer diameter, the length is 50 to 120 mm, the tubular body wall thickness is 4 to 12 mm, and the weld metal receiving width (cutting groove width) of the rebar to be inserted. It is preferable that it is equal to or wider than the groove width by about 50 mm.
【0012】また、本発明の鋼製スリーブはパイプ状鋼
から加工しても、平板鋼をプレスして加工して円筒形に
仕上げても良く、この時管状体と溶接金属受け間に切り
込み溝を設けることによって、容易に溶接金属受けを管
状体径より大きく加工でき、簡便に製造できる。Further, the steel sleeve of the present invention may be machined from a pipe-shaped steel or may be machined by pressing flat steel to finish it into a cylindrical shape. At this time, a notch groove is formed between the tubular body and the weld metal receiver. By providing the above, the weld metal receiver can be easily processed to have a diameter larger than that of the tubular body, and can be easily manufactured.
【0013】[0013]
【実施例】JIS G3112 に規定される SD390の各種外
径を有する異径鉄筋を、各種形状の鋼製スリーブを用い
てガスシールドアーク溶接を行った。それらの組合せを
表1に示す。溶接用ワイヤはJIS Z3312 YGW21 の1.
2mm 径を用い、溶接条件は下向溶接( 鉄筋水平) の場合
は電流200 〜280A, 電圧28〜35V 、横向溶接( 鉄筋垂
直) の場合は電流150 〜250A, 電圧18〜32V で炭酸ガス
流量25リットル/ 分とし、溶接用トーチは市販品を用い
た。溶接時の状況調査と溶接後に鉄筋外径の2.5 倍の半
径の治具で曲げ試験を行った。それらの結果を表1にま
とめて示す。[Examples] Different diameter rebars having various outer diameters of SD390 specified in JIS G3112 were subjected to gas shield arc welding using steel sleeves of various shapes. The combinations are shown in Table 1. The welding wire is JIS Z3312 YGW21 1.
With a diameter of 2 mm, the welding conditions are downward welding (rebar horizontal) with a current of 200 to 280 A, voltage 28 to 35 V, horizontal welding (rebar vertical) with a current of 150 to 250 A, voltage 18 to 32 V, and carbon dioxide flow rate. It was set to 25 liters / minute, and a commercially available welding torch was used. The welding condition was investigated and a bending test was performed after welding using a jig having a radius of 2.5 times the outer diameter of the reinforcing bar. The results are summarized in Table 1.
【0014】[0014]
【表1】 [Table 1]
【0015】表1において、No. 1〜3が本発明の鋼製
スリーブを用いた例、No. 4〜7が比較例である。本発
明の要件を満足するNo. 1〜3は、溶接時に溶接金属が
溶け落ちることなく、かつ溶接欠陥も生じない極めて良
好な接合部が得られた。比較例中No. 4およびNo. 5
は、溶接金属受けがないので、溶接時に溶接金属が溶け
落ちたので溶接を中止した。In Table 1, Nos. 1 to 3 are examples using the steel sleeve of the present invention, and Nos. 4 to 7 are comparative examples. In Nos. 1 to 3 satisfying the requirements of the present invention, extremely good joints were obtained in which the weld metal did not melt down during welding and welding defects did not occur. No. 4 and No. 5 in the comparative examples
Had no weld metal receiver, so the weld metal melted down during welding and welding was stopped.
【0016】No. 6は、溶接金属受け形状が管状体のま
まのO形で、U形に開口していないので、溶接時に溶接
トーチをウイービングできず、接合部に融合不良が生じ
て曲げ試験時に割れて70°までしか曲がらなかった。
No. 7は、溶接金属受けの角度が広すぎるので、溶接時
に溶接金属受けと切り込み溝の間から溶接金属が溶け落
ちたので溶接を中止した。[0016] No. 6 is an O type whose weld metal receiving shape is a tubular body and is not opened in a U shape. Therefore, the welding torch cannot be weaved during welding, resulting in poor fusion at the joint portion and bending test. Sometimes it cracked and only turned up to 70 °.
For No. 7, the angle of the weld metal receiver was too wide, and the weld metal melted down between the weld metal receiver and the cut groove during welding, so welding was stopped.
【0017】[0017]
【発明の効果】本発明の鉄筋の溶接継手用鋼製スリーブ
によれば、高能率なガスシールドアーク溶接方法での施
工に適用でき、簡便でかつ溶接金属が溶け落ちたり欠陥
が生じない接合部が得られるので、鉄筋接合の効率に大
きく寄与できる。EFFECTS OF THE INVENTION According to the steel sleeve for welded joint of reinforcing bar of the present invention, it can be applied to the construction by the highly efficient gas shielded arc welding method, and it is simple and does not cause the weld metal to be burned down or defective. As a result, it is possible to greatly contribute to the efficiency of reinforcing bar joining.
【図1】本発明の鋼製スリーブ例を示す斜視図である。FIG. 1 is a perspective view showing an example of a steel sleeve of the present invention.
【図2】(a)は本発明の鋼製スリーブ例の正面図を示
す。(b)は(a)のA−A断面図を示す。FIG. 2A shows a front view of an example of a steel sleeve of the present invention. (B) shows the AA sectional view of (a).
【図3】(a)は本発明の鋼製スリーブ例の正面図を示
す。(b)は(a)のB−B断面図を示す。FIG. 3A shows a front view of an example of a steel sleeve of the present invention. (B) shows the BB sectional view of (a).
【図4】(a),(b)は本発明の他の鋼製スリーブ例
の正面図を示す。4A and 4B are front views of another example of a steel sleeve according to the present invention.
【図5】本発明の鋼製スリーブに鉄筋を挿入した説明図
を示す。FIG. 5 shows an explanatory view in which a reinforcing bar is inserted in the steel sleeve of the present invention.
【図6】(a),(b)は従来の鋼製スリーブ例の正面
図を示す。6 (a) and 6 (b) are front views of a conventional steel sleeve example.
1 管状体 2 開口部 3 溶接金属受け 4 切り込み溝 5 鉄筋 6 割溝 7 切り欠き孔 1 Tubular Body 2 Opening 3 Weld Metal Receiver 4 Notch Groove 5 Reinforcing Bar 6 Split Groove 7 Notch Hole
フロントページの続き (72)発明者 佐伯 信郎 東京都中央区築地三丁目5番4号 日鐵溶 接工業株式会社内 (72)発明者 大島 英司 東京都中央区築地三丁目5番4号 日鐵溶 接工業株式会社内Front page continuation (72) Inventor Noburou Saeki 3-5-4 Tsukiji, Chuo-ku, Tokyo Nittetsu Welding Industry Co., Ltd. (72) Inventor Eiji Oshima 3-5-4 Tsukiji, Chuo-ku, Tokyo Nippon Steel Within Welding Industry Co., Ltd.
Claims (2)
て、管状体の中央部に開口部を設け、該開口部に溶接金
属受けが前記管状体と一体に設けられるとともに管状体
と溶接金属受けの間に切り込み溝を有して、該溶接金属
受けはU形に開口していることを特徴とする鉄筋の溶接
継手用鋼製スリーブ。1. A steel sleeve for a welded joint of a reinforcing bar, wherein an opening is provided at a central portion of a tubular body, and a weld metal receiver is integrally provided with the tubular body at the opening and the tubular body and the weld metal receiver are provided. A steel sleeve for a welded joint of a reinforcing bar, wherein a weld groove is provided between the weld metal receivers and the weld metal receiver is opened in a U shape.
0〜30°U型に開口していることを特徴とする請求項
1記載の鉄筋の溶接継手用鋼製スリーブ。2. The steel sleeve for a welded joint of a reinforcing bar according to claim 1, wherein the weld metal receiver is opened in a 0 to 30 ° U shape with respect to the vertical direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2701695A JPH08215892A (en) | 1995-02-15 | 1995-02-15 | Steel sleeve for weld joint of reinforcement |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2701695A JPH08215892A (en) | 1995-02-15 | 1995-02-15 | Steel sleeve for weld joint of reinforcement |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH08215892A true JPH08215892A (en) | 1996-08-27 |
Family
ID=12209303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2701695A Pending JPH08215892A (en) | 1995-02-15 | 1995-02-15 | Steel sleeve for weld joint of reinforcement |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH08215892A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111075117A (en) * | 2019-12-30 | 2020-04-28 | 周建 | Binding and welding sleeve for connecting reinforcing steel bars and using method thereof |
-
1995
- 1995-02-15 JP JP2701695A patent/JPH08215892A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111075117A (en) * | 2019-12-30 | 2020-04-28 | 周建 | Binding and welding sleeve for connecting reinforcing steel bars and using method thereof |
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