JP2003286718A - Joint-section backing ring for steel pipe for structure - Google Patents
Joint-section backing ring for steel pipe for structureInfo
- Publication number
- JP2003286718A JP2003286718A JP2002091677A JP2002091677A JP2003286718A JP 2003286718 A JP2003286718 A JP 2003286718A JP 2002091677 A JP2002091677 A JP 2002091677A JP 2002091677 A JP2002091677 A JP 2002091677A JP 2003286718 A JP2003286718 A JP 2003286718A
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- ring
- backing ring
- joint
- welding
- 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.)
- Granted
Links
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、鋼管杭などの構造
体用鋼管の中継溶接時に用いられる継手部裏当リングで
あって、特に簡易な構造でかつ溶接間隔の正確な確保を
可能とした継手部裏当リングに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint backing ring used for relay welding of a steel pipe for a structure such as a steel pipe pile, which has a particularly simple structure and enables to secure an accurate welding interval. Regarding the joint part backing ring.
【０００２】[0002]
【従来の技術】鋼管杭などの構造体用鋼管を中継溶接す
る場合、溶接端部の端面間に開先を形成する必要から鋼
管の継手部に裏当リングが一般的に用いられている。そ
して、従来では、裏当リングを挿入した鋼管の溶接端部
に溶接間隔保持用のスペーサーを挟入して、裏当リング
と構造体用鋼管とをスポット溶接することで溶接端部溶
接端部における溶接間隔が確保される。しかし、この場
合には構造体用鋼管の溶接に加えて、溶接間隔確保のた
めにも溶接が必要となるため、現場での作業が非常に煩
雑であった。またスペーサーが裏当リングに固定されて
いないことから、溶接間隔を確保するのに手間がかかる
点で改善の余地があった。2. Description of the Related Art When relay welding a structural steel pipe such as a steel pipe pile, a backing ring is generally used at a joint portion of the steel pipe because it is necessary to form a groove between the end faces of the welded ends. Then, conventionally, a spacer for holding a welding interval is inserted into a welding end of a steel pipe into which a backing ring is inserted, and the backing ring and the structural steel pipe are spot-welded to thereby weld the welding end. The welding interval in is secured. However, in this case, in addition to the welding of the structural steel pipe, welding is also required to secure the welding interval, so the work at the site was very complicated. Moreover, since the spacer is not fixed to the backing ring, there is room for improvement in that it takes time to secure the welding interval.
【０００３】前記した従来の作業の煩雑さを解消するた
め、図４（ａ）に示すような継手部裏当リング１０が提
案されている。継手部裏当リング１０は、リング本体１
１と、リング本体１１に取付けられた複数本の細棒１２
とからなり、この細棒１２はリング本体１１の軸方向中
央部の円周方向の６箇所から外側へ放射状に突出するよ
うに形成されている。そして、図４の継手部裏当リング
１０を構造体用鋼管の溶接端面の間に挿入することで、
溶接間隔が容易に保持できるようになっている。In order to eliminate the complexity of the conventional work described above, a joint backing ring 10 as shown in FIG. 4 (a) has been proposed. The joint backing ring 10 is the ring body 1
1 and a plurality of thin rods 12 attached to the ring body 11
The thin rods 12 are formed so as to radially project outward from six positions in the circumferential direction at the central portion of the ring body 11 in the axial direction. Then, by inserting the joint backing ring 10 of FIG. 4 between the weld end faces of the structural steel pipe,
The welding interval can be easily maintained.
【０００４】[0004]
【発明が解決しようとする課題】しかし、継手部裏当リ
ング１０では、図４（ｂ）に示すように、均一断面の細
棒１２をスタッド溶接でリング本体１１に取付けている
ので、細棒１２の基端部では溶接金属部が細棒１２の外
径より広がってしまう。したがって、継手部裏当リング
１０を構造体用鋼管にセットする際に、細棒１２の基端
部の溶接金属部１２ａが干渉して正確な溶接間隔が保持
できない場合がある。一方、図４（ｃ）に示すように、
基端側に雄ネジ１２ｂをきった細棒をリング本体１１の
雌ネジ孔１１ａに螺合し、その後リング本体１１の内側
から溶接１３した場合には前記問題は解消するが、継手
部裏当リング１０の加工工数が増加してコスト高となっ
てしまう。However, in the joint backing ring 10, as shown in FIG. 4 (b), the thin rod 12 having a uniform cross section is attached to the ring body 11 by stud welding. At the base end portion of 12, the weld metal portion expands beyond the outer diameter of the thin rod 12. Therefore, when the joint backing ring 10 is set on the structural steel pipe, the weld metal portion 12a at the base end portion of the thin rod 12 may interfere with each other and an accurate welding interval may not be maintained. On the other hand, as shown in FIG.
If a thin rod having a male screw 12b on the base end side is screwed into the female screw hole 11a of the ring body 11 and then welded 13 from the inside of the ring body 11, the above problem is solved, but the joint part backing The number of man-hours for processing the ring 10 increases and the cost increases.
【０００５】また図４の継手部裏当リング１０では細棒
１２に切り込みが設けられており、仮付溶接後にハンマ
ーで打撃して細棒１２を除去するようになっている。し
たがって、現場において構造体用鋼管に挟まれた状態の
細棒１２を折って除去しなければならず煩雑である。Further, in the joint backing ring 10 of FIG. 4, the thin rod 12 is provided with a notch, and the thin rod 12 is removed by hammering after tack welding. Therefore, the thin rod 12 sandwiched between the structural steel pipes must be broken and removed on site, which is complicated.
【０００６】本発明は前記従来技術の課題を解消するた
めにされたものであり、その目的は構造体用鋼管の継手
部裏当リングにおいて、簡易な構造でかつ溶接間隔の正
確な確保を可能とすることである。The present invention has been made in order to solve the above-mentioned problems of the prior art, and the object thereof is a simple structure and an accurate welding interval can be secured in a joint backing ring of a steel pipe for a structure. Is to
【０００７】[0007]
【課題を解決するための手段】（１） 第１の発明は、
構造体用鋼管１の中継溶接時に用いられる継手部裏当リ
ング２であって、前記継手部裏当リング２は構造体用鋼
管１内径より外径が若干小径であるリング本体３の外周
面に、溶接間隔を規定する外径を有しかつ基端部に切り
欠き段差部４ａが形成された突起体４を直立状態で複数
個取付けて構成されており、前記突起体４を前記リング
本体３に抵抗溶接してなることで、前記突起体４の基端
部の溶接金属部が溶接間隔を規定する突起体４の外径と
同じになるようにしたことを特徴とする構造体用鋼管の
継手部裏当リング２である。
（２） 第２の発明は、第１の発明において、リング本
体３に台形に切り欠かれたテーパー状スリット３ａが設
けられており、前記テーパー状スリット３ａに楔５を打
ち込んでリング本体３の径調整を可能としたことを特徴
とする。
（３） 第３の発明は、第１または第２の発明におい
て、突起体４の突起部長さＬ（突起体４の基端部から終
端までの長さ）が構造体用鋼管１の厚さ以下であること
を特徴とする。
（４） 第４の発明は、第１から第３の発明において、
突起体４が円周方向に１２０度の間隔をおいて３箇所に
設けられたことを特徴とする。[Means for Solving the Problems] (1) The first invention is
A joint part backing ring 2 used at the time of relay welding of the structural steel pipe 1, wherein the joint backing ring 2 is formed on an outer peripheral surface of a ring body 3 having an outer diameter slightly smaller than the inner diameter of the structural steel pipe 1. A plurality of protrusions 4 each having an outer diameter defining a welding interval and having a notch step portion 4a formed at a base end thereof are attached in an upright state. Of the steel pipe for a structural body, wherein the weld metal portion of the base end portion of the protrusion 4 has the same outer diameter as that of the protrusion 4 that defines the welding interval. The joint portion backing ring 2. (2) In the second invention, in the first invention, the ring main body 3 is provided with a tapered slit 3a that is cut out in a trapezoidal shape, and the wedge 5 is driven into the tapered slit 3a to make the ring main body 3 The feature is that the diameter can be adjusted. (3) In the third invention, in the first or second invention, the projection length L of the projection 4 (the length from the base end to the end of the projection 4) is the thickness of the structural steel pipe 1. It is characterized by the following. (4) A fourth invention is the same as the first to the third inventions,
It is characterized in that the projections 4 are provided at three places at intervals of 120 degrees in the circumferential direction.
【０００８】[0008]
【発明の実施の形態】以下、本発明の実施形態を図面を
参照しつつ詳細に説明する。図１は、本発明の継手部裏
当リングを示した図、図２は本発明の継手部裏当リング
を構造体用鋼管に挿入した状態を示した図、図３はリン
グ本体に溶接される突起体を示した図である。DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. 1 is a view showing a joint backing ring of the present invention, FIG. 2 is a view showing a state where the joint backing ring of the present invention is inserted into a steel pipe for a structure, and FIG. 3 is welded to a ring body. It is the figure which showed the protruding body.
【０００９】本発明の継手部裏当リング２は、リング本
体３に３つの突起体４を溶接固定して形成されている。
リング本体３の外径は構造体用鋼管１の内径より若干小
径に設定されており、構造体用鋼管１の内側に継手部裏
当リング２を挿入できるようになっている。The joint backing ring 2 of the present invention is formed by welding and fixing three projections 4 to the ring body 3.
The outer diameter of the ring body 3 is set to be slightly smaller than the inner diameter of the structural steel pipe 1, and the joint backing ring 2 can be inserted inside the structural steel pipe 1.
【００１０】またリング本体３には、リング本体３の軸
方向へハ字状に拡開した台形に切り欠かれたテーパー状
スリット３ａが設けられている。テーパー状スリット３
ａの対向する切断部はスリットの中心から線対称となる
ように傾斜している。Further, the ring body 3 is provided with a tapered slit 3a which is cut out in a trapezoidal shape which is opened in a V shape in the axial direction of the ring body 3. Tapered slit 3
The facing cut portions of a are inclined so as to be line symmetrical with respect to the center of the slit.
【００１１】このテーパー状スリット３ａは継手部裏当
リング２の径の調整を容易にするために設けられるもの
である。すなわち、構造体用鋼管１への継手部裏当リン
グ２の挿入時には、リング本体３を縮径させてより容易
に継手部裏当リング２を構造体用鋼管１に挿入すること
ができる。また構造体用鋼管１へ継手部裏当リング２を
挿入した後には、テーパー状スリット３ａへ楔５を打ち
込んでリング本体３を拡径させ、構造体用鋼管１と継手
部裏当リング２とを密着させてガタツキを解消すること
ができる。The tapered slit 3a is provided to facilitate adjustment of the diameter of the joint backing ring 2. That is, when inserting the joint backing ring 2 into the structural steel pipe 1, the diameter of the ring body 3 can be reduced to more easily insert the joint backing ring 2 into the structural steel pipe 1. Further, after inserting the joint backing ring 2 into the structural steel pipe 1, the wedge 5 is driven into the tapered slit 3a to expand the diameter of the ring body 3, and the structural steel pipe 1 and the joint backing ring 2 are connected. Can be closely attached to eliminate rattling.
【００１２】リング本体３の外周面には突起体４が３箇
所に取付けられている。本発明において突起体４は、本
溶接時の溶接間隔を確保するとともに、リング本体３が
構造体用鋼管１の中に沈みこむのを防止する係止部とし
て機能する。したがって、突起体４の外径は、構造体用
鋼管１の溶接端部間に確保する溶接間隔と等しくなるよ
うに設定され、溶接間隔を規定するものである。On the outer peripheral surface of the ring body 3, projections 4 are attached at three locations. In the present invention, the protrusion 4 functions as a locking portion that secures a welding interval at the time of main welding and prevents the ring body 3 from sinking into the structural steel pipe 1. Therefore, the outer diameter of the protrusion 4 is set to be equal to the welding interval secured between the weld ends of the structural steel pipe 1, and defines the welding interval.
【００１３】３つの突起体４は、リング本体３の外周面
においてリング中心軸と直交する円上に位置するよう
に、かつリング本体３に対して直立状態で取付けられて
いる。また図１（ｂ）に示すように突起体４は円周方向
に１２０度の間隔をおいてそれぞれ設けられている。す
なわち、３つの突起体４の基端部を結んだ面がリング本
体３と内接する正三角形を形成し、この正三角形がリン
グ中心軸と直交するように、突起体４はリング本体３に
取付けられている。The three protrusions 4 are attached to the ring body 3 in an upright state so as to be located on a circle orthogonal to the ring center axis on the outer peripheral surface of the ring body 3. Further, as shown in FIG. 1B, the protrusions 4 are provided at intervals of 120 degrees in the circumferential direction. That is, the surface connecting the base ends of the three protrusions 4 forms an equilateral triangle that is inscribed in the ring body 3, and the protrusion 4 is attached to the ring body 3 so that the equilateral triangle is orthogonal to the center axis of the ring. Has been.
【００１４】なお、本実施形態でリング本体３に突起体
４を３箇所に設けたのは、構造体用鋼管１を安定支持す
るためには少なくとも支持部が３点必要だからであり、
突起体４を３箇所よりも多くすると施工工数が増加する
上に、支持部の増加によりガタツキが生じやすくなるた
めである。In the present embodiment, the protrusions 4 are provided at three locations on the ring body 3 because at least three support portions are required to stably support the structural steel pipe 1,
This is because if the number of protrusions 4 is greater than three, the number of construction steps will increase and rattling will likely occur due to the increase in the number of supporting portions.
【００１５】また、突起体４は構造体用鋼管の本溶接の
際に溶材とともに溶解させるため、突起体４の突起部長
さＬ（突起体４の基端部から終端までの長さ）は構造体
用鋼管１の厚さ以下に設定される。例えば、鋼管径が１
００ｍｍ〜２００ｍｍ、鋼管板厚４ｍｍ〜７ｍｍの場合
には、突起部長さＬは３ｍｍ〜４ｍｍ程度にするとよ
い。これにより本溶接時に突起体４が溶けやすくなるの
で溶接欠陥が生じにくくなる。Further, since the projection 4 is melted together with the molten material during the main welding of the structural steel pipe, the projection length L of the projection 4 (the length from the base end to the end of the projection 4) is the structure. It is set to be equal to or less than the thickness of the body steel pipe 1. For example, the steel pipe diameter is 1
When the thickness of the steel pipe is 00 mm to 200 mm and the thickness of the steel pipe is 4 mm to 7 mm, the protrusion length L may be about 3 mm to 4 mm. As a result, the protrusions 4 are easily melted during the main welding, and welding defects are less likely to occur.
【００１６】図３（ａ），（ｂ）はリング本体３に溶接
される突起体４を示した図である。突起体４は、周方向
断面が均一である突起本体４ｂの一端を環状に切り欠い
たものであり、周方向断面が突起本体と相似形となる切
り欠き段差部４ａが溶接側の端部に形成されている。突
起体４の周方向断面形状は、構造物用鋼管１の溶接端部
に溶接間隔を保持できるものであれば、図３（ａ），
（ｂ）に示すような円や正方形の他、長方形などであっ
てもよい。なお、突起体４の製造では、突起本体４ｂの
切断後に切り欠き段差部４ａの加工が連続的に行なえる
ため、加工手間はほとんど増加しない。3 (a) and 3 (b) are views showing the protrusion 4 welded to the ring body 3. FIG. The protrusion 4 is formed by annularly cutting one end of a protrusion main body 4b having a uniform circumferential cross-section, and a notch step 4a having a circumferential cross-section similar to that of the protrusion main body is provided at an end on the welding side. Has been formed. As long as the circumferential cross-sectional shape of the projection 4 is such that a welding interval can be maintained at the weld end of the structural steel pipe 1, FIG.
It may be a rectangle or the like as well as a circle or a square as shown in (b). In the production of the protrusion 4, the notch step portion 4a can be continuously processed after the protrusion body 4b is cut, so that the processing labor hardly increases.
【００１７】突起体４は、切り欠き段差部４ａが形成さ
れた端部をリング本体３と接触させた状態で抵抗溶接に
よってリング本体３と溶接される。本発明では突起体４
に環状の切り欠き段差部４ａを設けたことにより、突起
体４の基端部の溶接金属部が溶接間隔を規定する突起体
４の外径と同じになるようになっている。本発明の切り
欠き段差部４ａにおける切り欠きの幅および深さは、溶
接金属部の量に応じて突起体４のサイズ毎に設定され
る。The protrusion 4 is welded to the ring body 3 by resistance welding in a state where the end portion where the notch step portion 4a is formed is in contact with the ring body 3. In the present invention, the protrusion 4
By providing the annular notch step portion 4a, the weld metal portion of the base end portion of the protrusion 4 has the same outer diameter as that of the protrusion 4 that defines the welding interval. The width and depth of the notch in the notch step portion 4a of the present invention are set for each size of the protrusion 4 in accordance with the amount of the weld metal portion.
【００１８】以下、本発明の継手部裏当リング２を用い
た構造体用鋼管１の接合手順を説明する。The procedure for joining the structural steel pipe 1 using the joint backing ring 2 of the present invention will be described below.
【００１９】まず、継手部裏当リング２の突起体４が構
造体用鋼管１の溶接端部に接触するまで、一方の構造体
用鋼管内１に継手部裏当リング２を挿入する。First, the joint backing ring 2 is inserted into one of the structural steel pipes 1 until the projection 4 of the joint backing ring 2 comes into contact with the weld end of the structural steel pipe 1.
【００２０】次に、継手部裏当リング２の挿入後に継手
部裏当リング２のテーパー状スリット３ａへ楔５を打ち
込んで、構造体用鋼管１と継手部裏当リング２とを密着
させる。さらに、継手部裏当リングと楔５とをスポット
溶接５ａして、継手部裏当リング２を構造体用鋼管１に
固定する。Next, after the joint backing ring 2 is inserted, a wedge 5 is driven into the tapered slit 3a of the joint backing ring 2 to bring the structural steel pipe 1 and the joint backing ring 2 into close contact with each other. Further, the joint backing ring and the wedge 5 are spot-welded 5a to fix the joint backing ring 2 to the structural steel pipe 1.
【００２１】そして、継手部裏当リング２が挿入された
一方の構造体用鋼管１と、他方の構造体用鋼管１とを突
き合わせる。突起体４のリング軸方向長さは溶接間隔と
等しいため、構造体用鋼管１の溶接端部間に挟まれた突
起体４によって所望の溶接間隔の開先が確保される。ま
た本発明では、突起体４とリング本体３との溶接後にお
いて、突起体４の基端部の溶接金属部が溶接間隔を規定
する突起体４の外径と同じになるため、突起体４の基端
部の溶接金属部が構造体用鋼管１と干渉することもな
い。なお、開先の底はリング本体３により閉塞されてい
る。Then, the one structural steel pipe 1 in which the joint backing ring 2 is inserted and the other structural steel pipe 1 are butted against each other. Since the ring axial length of the protrusion 4 is equal to the welding interval, the groove of the desired welding interval is secured by the protrusion 4 sandwiched between the weld ends of the structural steel pipe 1. Further, in the present invention, after welding the protrusion 4 and the ring body 3, the weld metal portion at the base end portion of the protrusion 4 has the same outer diameter as that of the protrusion 4 defining the welding interval. The welded metal portion at the base end of does not interfere with the structural steel pipe 1. The bottom of the groove is closed by the ring body 3.
【００２２】その後、構造体用鋼管１の溶接端部間の開
先に本溶接を行って、一方の構造体用鋼管１と、他方の
構造体用鋼管１とを連結する。本発明では、突起体４は
構造体用鋼管１の本溶接の際に溶材とともに溶解し、か
つ突起体４の突起部長さＬ（突起体４の基端部から終端
までの長さ）は構造体用鋼管１の厚さ以下に設定されて
いる。したがって、本発明では、図４の従来例のように
細棒１２の余長部の除去作業を行なう必要はない。After that, main welding is performed in the groove between the welding ends of the structural steel pipe 1 to connect one structural steel pipe 1 and the other structural steel pipe 1. In the present invention, the projection 4 is melted together with the molten material during the main welding of the structural steel pipe 1, and the projection length L of the projection 4 (the length from the base end to the end of the projection 4) is the structure. It is set to be equal to or less than the thickness of the body steel pipe 1. Therefore, in the present invention, it is not necessary to remove the extra length portion of the thin rod 12 as in the conventional example of FIG.
【００２３】[0023]
【発明の効果】本発明の継手部裏当リングは、切り欠き
段差部が設けられた突起体をリング本体に抵抗溶接して
なることで、突起体の基端部の溶接金属部が溶接間隔を
規定する突起体の外径と同じになるように構成されてい
る。したがって本発明では、継手部裏当リングを構造体
用鋼管にセットする際に突起体の基端部の溶接金属部が
干渉することなく、簡易な構成で正確な溶接間隔が保持
できる。The joint backing ring of the present invention is formed by resistance-welding the projection having the notch step to the ring body, so that the weld metal portion at the base end of the projection has a welding interval. The outer diameter of the protrusion that defines Therefore, in the present invention, when the joint backing ring is set in the steel pipe for structure, the weld metal portion at the base end portion of the projection does not interfere with each other, and the accurate welding interval can be maintained with a simple configuration.
【００２４】本発明の継手部裏当リングでは、テーパー
状スリットにより径の調整を容易に行なうことができ
る。すなわち、構造体用鋼管への継手部裏当リングの挿
入時には、リング本体を縮径させてより容易に継手部裏
当リングを構造体用鋼管に挿入することができる。また
構造体用鋼管へ継手部裏当リングを挿入した後には、テ
ーパー状スリットへ楔を打ち込んでリング本体を拡径さ
せ、構造体用鋼管と継手部裏当リングとを密着させてガ
タツキを解消することができる。In the joint backing ring of the present invention, the diameter can be easily adjusted by the tapered slit. That is, when inserting the joint backing ring into the structural steel pipe, the diameter of the ring body can be reduced to more easily insert the joint backing ring into the structural steel pipe. Also, after inserting the joint backing ring into the structural steel pipe, hammer the wedge into the tapered slit to expand the ring body and close the structural steel pipe and the joint backing ring to eliminate rattling. can do.
【００２５】本発明の継手部裏当リングでは、突起体の
突起部長さが構造体用鋼管の厚さ以下に設定されてい
る。したがって、溶接後に細棒（突起体）の余長部の除
去作業を行なう必要もないため、作業効率が向上する。In the joint backing ring of the present invention, the length of the protrusion of the protrusion is set to be equal to or less than the thickness of the steel pipe for structure. Therefore, it is not necessary to remove the extra long portion of the thin rod (projection body) after welding, so that the work efficiency is improved.
【００２６】また本発明の継手部裏当リングでは、リン
グ本体の外周面において、リング軸方向と直交する円上
に位置するように、円周方向に１２０度の間隔をおいて
３箇所に突起体が直立状態で取付けられている。したが
って、簡易な構成で構造体用鋼管を安定支持することが
可能である。Further, in the joint part backing ring of the present invention, three protrusions are provided on the outer peripheral surface of the ring body at intervals of 120 degrees in the circumferential direction so as to be located on a circle orthogonal to the ring axis direction. The body is mounted upright. Therefore, it is possible to stably support the structural steel pipe with a simple structure.
【図１】本発明の継手部裏当リングの斜視図（ａ）と平
面図（ｂ）である。FIG. 1 is a perspective view (a) and a plan view (b) of a joint backing ring of the present invention.
【図２】（ａ）は構造体用鋼管相互間に継手部裏当リン
グを挿入した状態を示す斜視図であり、（ｂ）は（ａ）
の分解斜視図である。FIG. 2 (a) is a perspective view showing a state where a joint backing ring is inserted between steel pipes for a structure, and FIG. 2 (b) is a view (a).
FIG.
【図３】（ａ）および（ｂ）はリング本体に溶接される
突起片の斜視図である。（ｃ）は溶接前の突起片とリン
グ本体とを示した図であり、（ｄ）はリング本体に溶接
後の突起体の状態を示した図である。3 (a) and 3 (b) are perspective views of a protruding piece welded to a ring body. (C) is a diagram showing a protrusion piece and a ring body before welding, and (d) is a diagram showing a state of the protrusion body after welding to the ring body.
【図４】（ａ）は従来例の継手部裏当リングの斜視図で
ある。（ｂ）は細棒をスタッド溶接でリング本体に取付
けた状態を示す平面図であり、（ｃ）は細棒をリング本
体に螺合した後にリング本体の内側から溶接固定した状
態を示す平面図である。FIG. 4A is a perspective view of a joint part backing ring of a conventional example. (B) is a plan view showing a state where the thin rod is attached to the ring body by stud welding, and (c) is a plan view showing a state where the thin rod is screwed into the ring body and then fixed by welding from the inside of the ring body. Is.
１ 構造体用鋼管 ２ 継手部裏当リング ３ リング本体 ３ａ テーパー状スリット ４ 突起体 ４ａ 切り欠き段差部 ４ｂ 突起本体 ５ 楔 ５ａ スポット溶接 １０ 継手部裏当リング １１ リング本体 １１ａ 雌ネジ孔 １２ 細棒 １２ａ 溶接金属部 １２ｂ 雄ネジ １３ 溶接部 1 Steel pipe for structure 2 Joint part backing ring 3 ring body 3a Tapered slit 4 protrusions 4a Notch step 4b protrusion body 5 wedges 5a Spot welding 10 Joint part backing ring 11 Ring body 11a Female screw hole 12 thin rod 12a Weld metal part 12b male screw 13 Weld
フロントページの続き (72)発明者 高橋 和夫 埼玉県三郷市新和４−107−１ 有限会社 溶和工業内 Ｆターム(参考） 2D041 AA02 BA19 BA44 CA01 CB06 DB02 DB13 Continued front page (72) Inventor Kazuo Takahashi 4-107-1, Shinwa, Misato City, Saitama Prefecture Limited Company Inside the Sowa industry F term (reference) 2D041 AA02 BA19 BA44 CA01 CB06 DB02 DB13
Claims (4)
継手部裏当リングであって、前記継手部裏当リングは構
造体用鋼管内径より外径が若干小径であるリング本体の
外周面に、溶接間隔を規定する外径を有しかつ基端部に
切り欠き段差部が形成された突起体を直立状態で複数個
取付けて構成されており、前記突起体を前記リング本体
に抵抗溶接してなることで、前記突起体の基端部の溶接
金属部が溶接間隔を規定する突起体の外径と同じになる
ようにしたことを特徴とする構造体用鋼管の継手部裏当
リング。1. A joint backing ring used during relay welding of a structural steel pipe, wherein the joint backing ring is formed on an outer peripheral surface of a ring body having an outer diameter slightly smaller than an inner diameter of the structural steel pipe. , A plurality of protrusions each having an outer diameter that defines a welding interval and having a notch step portion formed at a base end thereof are mounted in an upright state, and the protrusions are resistance-welded to the ring body. By so doing, the weld metal portion of the base end portion of the protrusion has the same outer diameter as the protrusion defining the welding interval.
ー状スリットが設けられており、前記テーパー状スリッ
トに楔を打ち込んでリング本体の径調整を可能としたこ
とを特徴とする請求項１に記載の構造体用鋼管の継手部
裏当リング。2. The ring main body is provided with a tapered slit cut out in a trapezoidal shape, and a wedge is driven into the tapered slit to adjust the diameter of the ring main body. A backing ring for a joint portion of the described steel pipe for a structure.
さ以下であることを特徴とする請求項１または請求項２
に記載の構造体用鋼管の継手部裏当リング。3. The length of the protrusion of the protrusion is equal to or less than the thickness of the steel pipe for a structure body.
The joint backing ring of the steel pipe for a structure according to.
いて３箇所に設けられたことを特徴とする請求項１から
請求項３のいずれか１項に記載の構造体用鋼管の継手部
裏当リング。4. The structural steel pipe according to any one of claims 1 to 3, wherein the projections are provided at three locations at intervals of 120 degrees in the circumferential direction. Joint backing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002091677A JP3958614B2 (en) | 2002-03-28 | 2002-03-28 | Backing ring for joints of steel pipes for structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002091677A JP3958614B2 (en) | 2002-03-28 | 2002-03-28 | Backing ring for joints of steel pipes for structures |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003286718A true JP2003286718A (en) | 2003-10-10 |
| JP3958614B2 JP3958614B2 (en) | 2007-08-15 |
Family
ID=29236708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002091677A Expired - Lifetime JP3958614B2 (en) | 2002-03-28 | 2002-03-28 | Backing ring for joints of steel pipes for structures |
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| Country | Link |
|---|---|
| JP (1) | JP3958614B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010214386A (en) * | 2009-03-13 | 2010-09-30 | Toyota Home Kk | Backing metal |
| JP2012180680A (en) * | 2011-03-01 | 2012-09-20 | Kubota Corp | Connection structure of steel pipe sheet pile |
| JP2014519004A (en) * | 2011-05-03 | 2014-08-07 | カダント ジョンソン インコーポレーテッド | Turbulent bar assembly |
| JP2018204257A (en) * | 2017-06-01 | 2018-12-27 | 株式会社横山基礎工事 | Ring-shaped tip metal and pile installation method by inner excavation using it |
-
2002
- 2002-03-28 JP JP2002091677A patent/JP3958614B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010214386A (en) * | 2009-03-13 | 2010-09-30 | Toyota Home Kk | Backing metal |
| JP2012180680A (en) * | 2011-03-01 | 2012-09-20 | Kubota Corp | Connection structure of steel pipe sheet pile |
| JP2014519004A (en) * | 2011-05-03 | 2014-08-07 | カダント ジョンソン インコーポレーテッド | Turbulent bar assembly |
| JP2018204257A (en) * | 2017-06-01 | 2018-12-27 | 株式会社横山基礎工事 | Ring-shaped tip metal and pile installation method by inner excavation using it |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3958614B2 (en) | 2007-08-15 |
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