JP3336430B2 - Vertical joints for steel pipe sheet piles - Google Patents
Vertical joints for steel pipe sheet pilesInfo
- Publication number
- JP3336430B2 JP3336430B2 JP35266499A JP35266499A JP3336430B2 JP 3336430 B2 JP3336430 B2 JP 3336430B2 JP 35266499 A JP35266499 A JP 35266499A JP 35266499 A JP35266499 A JP 35266499A JP 3336430 B2 JP3336430 B2 JP 3336430B2
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- joint material
- pile
- joint
- pin joint
- 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
Links
Landscapes
- Piles And Underground Anchors (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鋼管本体の外側長手方
向に沿って、連結用の継手部材を有する鋼管矢板や鋼管
杭どうしの縦継ぎ（胴継ぎ）を行う装置に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for joining pipe piles or pipe piles having joint members for connection along the outer longitudinal direction of a steel pipe main body.
【０００２】[0002]
【従来の技術】建造物やその施工においては鋼管の利用
が多くなってきており、例えば、鋼管を用いた矢板（鋼
管矢板）どうしを柱列状に結合した鋼管柱列土留壁や地
盤流動化対策構造物として、あるいは、建造物を支持す
る鋼管杭として用いられている。2. Description of the Related Art Steel pipes are increasingly used in buildings and their construction. For example, steel pipe column-column soil retaining walls and soil fluidization in which sheet piles using steel pipes (steel pipe sheet piles) are connected in a columnar manner. It is used as a countermeasure structure or as a steel pipe pile supporting a building.
【０００３】鋼管矢板は、それを互いに柱列結合する必
要から、図10、図11に示すように、鋼管本体１の対向す
る両外側面に、連結用の継手部材２，３を設けた鋼管矢
板Ａが使用されている。また、それら鋼管矢板や鋼管杭
は、定尺のものを現場に搬入し、所定長さの鋼管矢板、
鋼管杭を沈設するために、通常は定尺のものを現場で縦
継ぎしながら沈設し、所定の長さのものとするが、この
縦継ぎは、従来、埋設孔に挿入した下杭に対して、上杭
をクレーンで吊り下げて突合させ、溶接する方法が採ら
れている。しかし、この溶接による縦継ぎは、現場溶接
であるため、作業に多くの時間を要するとともに熟練し
た溶接工が必要となり、また、溶接部の品質が天候に左
右されるばかりでなく、溶接に伴う裏当てリング等の金
具を使用する等面倒で多くの費用を要している。[0003] Since the steel pipe sheet piles need to be connected to each other in a row, as shown in FIGS. 10 and 11, a steel pipe main body 1 is provided with connecting members 2 and 3 for connection on opposite outer surfaces thereof. Sheet pile A is used. In addition, these steel pipe sheet piles and steel pipe piles are transported to the site at a fixed size, and steel pipe sheet piles of a predetermined length,
In order to lay down steel pipe piles, usually, a fixed-length one is laid down while being longitudinally spliced at the site, and has a predetermined length. Then, the upper pile is suspended by a crane, butted and welded. However, since this joining is a field welding, it takes a lot of time to work and requires a skilled welder, and the quality of the welded portion is not only affected by the weather but also accompanied by welding. It is troublesome to use metal fittings such as a backing ring and requires a lot of cost.
【０００４】特に、継手部材２，３の設けられた鋼管矢
板では、図12に示すように、縦継ぎ溶接にあたって鋼管
本体１どうしの溶接作業に継手部材２，３がじゃまにな
らないように、鋼管本体１の両端より相当内方（約300
ｍｍ）にわたる範囲を除いて取り付けた構造に製作され
ている。そして、鋼管本体１，１どうしを溶接した後
は、図13に示すように、そして、両鋼管矢板Ａ（上杭Ａ
1 ，上杭Ａ2 ）の継手部材２，２，３，３間に補充継手
部材25を挿入して溶接し、継手部材２，３を連続させる
ようにしている。したがって、継手部材を有する鋼管矢
板の溶接による縦継ぎは一層熟練と手間を要していると
いった状況である。そこで、溶接による縦継ぎに代るも
のとして、上杭と下杭をネジ継手によって結合する方法
（一例として実開昭57-133645号、実開昭59-98923号、
特開平4-70414号公報参照）が提案されている。[0004] In particular, in a steel sheet pile provided with the joint members 2 and 3, as shown in FIG. 12, the steel pipe sheet piles are not hindered in the welding operation of the steel pipe bodies 1 during longitudinal joint welding. Considerably inward from both ends of body 1 (approx. 300
mm). Then, after welding the steel pipe main bodies 1 and 1 to each other, as shown in FIG.
1 , the supplementary joint member 25 is inserted between the joint members 2, 2, 3 and 3 of the upper pile A 2 ) and welded to make the joint members 2 and 3 continuous. Therefore, vertical joining by welding of a steel pipe sheet pile having a joint member requires more skill and time. Therefore, as an alternative to longitudinal jointing by welding, a method of connecting the upper pile and the lower pile with a screw joint (for example, Japanese Utility Model Laid-Open No. 57-133645, Japanese Utility Model Laid-Open No. 59-98923,
Japanese Patent Laid-Open No. 4-70414) has been proposed.
【０００５】しかし、この方法のものでは、製作が面倒
で高価になるとともに結合作業も面倒である。しかも、
鋼管矢板の縦継ぎは、通常、下杭に上杭を吊り降ろして
継ぎ合わせるので、上杭を吊り降ろしながら螺合のため
に回転させることは極めて困難なことである。特に継手
部材を有する鋼管矢板では、継手部材２，３どうしの位
置合わせを正確に行わなければならず、芯合わせが極め
て困難となるので、ネジ継手による結合方法は到底採用
することのできない方法である。However, in this method, the production is complicated and expensive, and the joining work is also complicated. Moreover,
Since vertical joining of steel pipe sheet piles is usually performed by hanging an upper pile on a lower pile and joining the piles, it is extremely difficult to rotate for screwing while hanging the upper pile. Particularly, in the case of a steel sheet pile having a joint member, the joint members 2 and 3 must be accurately aligned with each other, and the centering becomes extremely difficult. Therefore, the joining method using a screw joint is a method that cannot be adopted at all. is there.
【０００６】本発明は、かかる事情にかんがみなされた
もので、継手部材付きの鋼管矢板または鋼管杭の溶接に
よる縦継ぎ方法に代わる機械的手段により、しかも、特
殊な機械を用いたり、特別な技能を要することなく、強
固にかつ簡単に施工することのできるようにした、鋼管
矢板等（鋼管矢板または鋼管杭）の新規な縦継ぎ装置を
提供しようとするものである。The present invention has been made in view of the above circumstances, and uses mechanical means in place of the method of joining pipes by welding steel pipe sheet piles or steel pipe piles with joint members, and uses a special machine or special skills. It is an object of the present invention to provide a new vertical joint device for steel pipe sheet piles or the like (steel pipe sheet piles or steel pipe piles) that can be firmly and easily constructed without requiring.
【０００７】[0007]
【問題を解決するための手段】本発明では、縦継ぎする
鋼管矢板等の一方の端部には雄形のピン継手材を、他方
にはピン継手材を挿入する雌形のボックス継手を設け
て、上杭と下杭とをピン継手材とボックス継手材の嵌め
合わせで行うようにする。それら両継手材には、その接
合面に溝条を、両継手の嵌合時に互いに合致する位置に
設けるとともに、ボックス継手材の溝条にはボルトの操
作で螺進する円弧キーを収めておき、両継手を嵌め合わ
せ後、ボルトの操作で円弧キーを両継手材の溝条に契合
させて結合できるようにした。According to the present invention, a male pin joint is provided at one end of a steel pipe sheet pile or the like to be vertically spliced, and a female box joint is provided at the other end for inserting the pin joint. Then, the upper pile and the lower pile are fitted by fitting the pin joint material and the box joint material. Grooves are provided on the joint surfaces of the two joint members at positions matching each other when the two joints are fitted, and arc keys which are screwed by bolts are housed in the groove of the box joint member. After fitting the two joints, the arc key is engaged with the groove of both the joint materials by the operation of the bolt so that the joints can be joined.
【０００８】これを、実施例に対応する図１〜図９を参
照して説明すると、請求項１に対応する第１の装置は、
鋼管本体１の対向する外側面に鋼管本体１の長手方向に
沿う継手部材２，３を設けてなる鋼管矢板Ａ1 の、上記
鋼管本体１の端部に、雄形のピン継手材５を突設され、
また、この鋼管矢板Ａ1と縦継ぎする他方の鋼管矢板Ａ2
には、その鋼管本体１の上記鋼管矢板Ａ1と結合する側
の端部に、上記ピン継手材５と嵌合する雌形のボックス
継手材10が突設されており、上記ピン継手材５は、鋼管
本体１とほぼ同径とした基筒部６に続き、基筒部６より
小径とした嵌挿部７が延設され、嵌挿部７の基端外側
に、係合凹部９ｂを周設した接合端面９ａが形成されて
いるとともに、嵌挿部７の先端には係合突部９ｃが周設
され、また、上記ボックス継手材10は、外径が鋼管本体
１とほぼ同径とした筒状をなし、その内周には、上記ピ
ン継手材５の嵌挿部７を受け入れる嵌受部11が形成さ
れ、該嵌受部11の先端には、ピン継手材５の嵌挿部７の
基端外側の接合端面９ａと接する端面12ａと、係合凹部
９ｂと係合する突部12ｂが形成されているとともに、嵌
受部11の基端には嵌挿部７の先端の係合突部９ｃと係合
する凹部13が周設され、そして、上記ピン継手材５の外
周とボックス継手材10内周の相互接合面７ａ，11ａに、
それぞれ対向して内、外溝条８，14が周設され、ボック
ス継手材10の内溝条14内には、ボックス継手材10の外側
からの操作で螺進するボルト16によって、外溝条８と内
溝条14に跨って契合する円弧キー17を収容したことを特
徴とするものである。This will be described with reference to FIGS. 1 to 9 corresponding to the embodiment.
Collision of steel pipe sheet piles A 1 formed by providing the joint members 2, 3 along the longitudinal direction of the steel pipe pile body 1 on the outer surface, the end portion of the steel tube body 1, a pin joint member 5 of the male opposite the steel tube body 1 Established
Also, the other steel pipe sheet pile A 2 vertically connected to this steel pipe sheet pile A 1
To the end portion on the side coupled with the steel pipe sheet piles A 1 of the steel pipe pile body 1, the pin joint member 5 and the female box joint member 10 to be fitted are projected, the pin joint member 5 A fitting portion 7 having a diameter smaller than that of the base portion 6 is extended from a base portion 6 having substantially the same diameter as that of the steel pipe main body 1, and an engaging recess 9 b is formed outside the base end of the fitting portion 7. A peripherally provided joint end face 9a is formed, and an engaging projection 9c is provided at the end of the fitting portion 7. The outer diameter of the box joint member 10 is substantially the same as that of the steel pipe main body 1. A receiving portion 11 for receiving the fitting portion 7 of the pin joint material 5 is formed on an inner periphery thereof, and a fitting portion of the pin fitting material 5 is An end surface 12a in contact with the joining end surface 9a outside the base end of the portion 7 and a projection 12b engaging with the engagement recess 9b are formed. A concave portion 13 is provided around the distal end to engage with the engaging protrusion 9c. The outer joint surface of the pin joint member 5 and the inner joint surface 7a of the box joint member 10 are connected to each other.
Inner and outer grooves 8 and 14 are provided to face each other, and inside the inner groove 14 of the box joint member 10, bolts 16 which are screwed by operation from the outside of the box joint member 10 are provided. An arc key 17 which is engaged over the inner groove 8 and the inner groove 14 is housed.
【０００９】また、請求項２に対応する装置は、請求項
１の装置において、縦継ぎする両鋼管矢板Ａ１，Ａ２の
継手部材２，３を、両鋼管矢板を縦継ぎした際、それら
の継手部材２，２，３，３どうしが突き合わせとなるよ
うにして設けたことを特徴とするものである。The apparatus according to claim 2 is the apparatus according to claim 1, wherein the joint members 2 and 3 of the steel pipe sheet piles A 1 and A 2 to be vertically spliced are used when the steel pipe sheet piles are spliced vertically. The joint members 2, 2, 3, and 3 are provided so as to abut each other.
【００１０】また、請求項３に対応する第２の装置は、
鋼管杭Ｂ１の端部に、雄形のピン継手材５が突設され、
また、この鋼管杭Ｂ１と縦継ぎする他方の鋼管杭Ｂ２に
は、上記鋼管杭Ｂ1と結合する側の端部に、上記ピン継
手材５と嵌合する雌形のボックス継手材10が突設されて
おり、上記ピン継手材５は、鋼管杭Ｂ1 とほぼ同径とし
た基筒部６に続き、基筒部６より小径とした嵌挿部７が
延設され、嵌挿部７の基端外側に、係合凹部９ｂを周設
した接合端面９ａが形成されているとともに、嵌挿部７
の先端には係合突部９ｃが周設され、また、上記ボック
ス継手材10は、外径が鋼管杭Ｂ２ とほぼ同径とした筒
状をなし、その内周には、上記ピン継手材５の嵌挿部７
を受け入れる嵌受部11が形成され、該嵌受部11の先端に
は、ピン継手材５の嵌挿部７の基端外側の接合端面９ａ
と接する端面12ａと、係合凹部９ｂと係合する突部12ｂ
が形成されているとともに、嵌受部11の基端には嵌挿部
７の先端の係合突部と係合する凹部13が周設され、そし
て、上記ピン継手材５の外周とボックス継手材10の内周
の相互の接合面７ａ，11ａに、それぞれ対向して内、外
溝条８，14が周設され、ボックス継手材の内溝条14内に
は、ボックス継手材10の外側からの操作で螺進するボル
ト16によって、外溝条８と内溝条14に跨って契合する円
弧キー17を収容したことを特徴とするものである。Further, a second device according to claim 3 is:
The end portion of the steel pipe pile B 1, pin joint member 5 of the male is projected,
Further, the other steel pipe pile B 2 which jointed and the steel pipe pile B 1, the end on the side for coupling with the steel pipe pile B 1, female box joint member for mating with the pin joint member 5 10 The pin joint member 5 is provided with a fitting portion 7 having a diameter smaller than that of the base tube portion 6, extending from a base tube portion 6 having substantially the same diameter as the steel pipe pile B 1. Outside the base end of the portion 7, a joining end surface 9a around which an engagement recess 9b is provided is formed.
The tip is engaging projections 9c is circumferentially, also the box joint member 10, a substantially the same diameter as the cylindrical outer diameter steel pipe piles B 2, the inner periphery thereof, the pin joint Insertion part 7 of material 5
A receiving end 11 is formed at the distal end of the receiving end 11.
End surface 12a contacting with projection 12b engaging with engagement recess 9b.
A recess 13 is formed at the base end of the fitting receiving portion 11 to engage with the engaging projection at the distal end of the fitting portion 7, and the outer periphery of the pin joint material 5 and the box joint are formed. Inner and outer grooves 8 and 14 are provided around the inner joint surfaces 7a and 11a of the inner periphery of the material 10 so as to face each other. An arc key 17 that straddles the outer groove 8 and the inner groove 14 is housed by a bolt 16 that is screwed by an operation from step (1).
【００１１】また、請求項４に対応する装置は、請求項
１乃至３の装置において、ピン継手材５とボックス継手
材10の各接合面を階段状24に形成したことを特徴とする
ものである。An apparatus according to a fourth aspect is the apparatus according to the first to third aspects, wherein each joint surface of the pin joint member 5 and the box joint member 10 is formed in a stepped shape 24. is there.
【００１２】[0012]
【発明の実施の形態】以下、本発明の実施の形態につい
て図面を参照して説明する。図１〜図５は、第１の装置
の一実施例を示し、図６、図７は第２の装置の一実施例
を示し、図８、図９はそれぞれ第１、第２装置に共通し
たの他の実施例を示したものである。Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show an embodiment of the first device, FIGS. 6 and 7 show an embodiment of the second device, and FIGS. 8 and 9 are common to the first and second devices, respectively. This shows another embodiment.
【００１３】まず、鋼管矢板を対象とする第１の装置に
ついて説明する。図１〜図４において、Ａ1 は上杭とな
る鋼管矢板、Ａ2 は下杭となる鋼管矢板である。それら
の鋼管矢板（上杭、下杭）Ａ1 、Ａ2 は、その鋼管本体
１の外側面長手方向に一対のパイプ状をなす継手部材
２，３が設けられており、一般に、その一方は断面Ｏ形
の雄部材２に、他方は断面Ｃ形の雌部材３となってい
る。そして、上杭Ａ1 には、下杭Ａ2 と結合させる端部
に雄形のピン継手材５が溶接により突設され、また、下
杭Ａ2の上杭Ａ１と結合させる端部に、上記ピン継手材
５を受け入れる雄形のボックス継手材10が溶接により突
設されている。First, a first apparatus for steel pipe sheet piles will be described. In FIGS 4, A 1 is steel sheet pile, A 2 to be Uekui is steel sheet pile comprising a Shitakui. The steel pipe sheet piles (upper pile, lower pile) A 1 and A 2 are provided with a pair of pipe-shaped joint members 2 and 3 in the longitudinal direction of the outer surface of the steel pipe main body 1. The male member 2 has an O-shaped cross section, and the other member has a female member 3 having a C-shaped cross section. Then, the upper pile A 1, pin joint member 5 of the male to the end for coupling with the lower pile A 2 is protruded by welding, also the end portion for coupling with pile A 1 on the lower pile A 2 A male box joint member 10 for receiving the pin joint member 5 is provided by welding.
【００１４】ピン継手材５は、筒状に形成されており、
鋼管本体１の外径とほぼ同径とした基筒部６に続き、基
筒部６より小径とした嵌挿部７が延設されている。そし
て、嵌挿部７の基端外側には、後述するボックス継手材
10の先端と接する接合端面９ａが形成され、その接合端
面９ａには、係合凹部９ｂが周設されているとともに、
嵌挿部７の先端には、係合突部９ｃが周設されている。
また、嵌挿部７の外周接合面７ａには、後述する円弧キ
ーを契合する外溝条８が周設されている。The pin joint member 5 is formed in a cylindrical shape.
A fitting portion 7 having a diameter smaller than that of the base tube portion 6 extends from a base tube portion 6 having substantially the same diameter as the outer diameter of the steel pipe main body 1. A box joint material to be described later is provided outside the base end of the fitting portion 7.
A joining end surface 9a is formed to be in contact with the tip of 10, and an engaging concave portion 9b is provided on the joining end surface 9a.
An engagement projection 9c is provided around the tip of the insertion portion 7.
In addition, an outer groove 8 that engages with an arc key, which will be described later, is provided around the outer peripheral joining surface 7a of the insertion portion 7.
【００１５】ボックス継手材10は、外径が鋼管本体１の
外径と同径とした筒状をなしており、その内周には、上
記ピン継手材５の嵌挿部７を受け入れ、その接合面７ａ
と対応する形状の接合面11ａを形成した嵌受部11が形成
され、先端にはピン継手５材の基筒部６と嵌挿部７の接
合端面９ａに接する端面12ａと係合凹部９ｂと係合する
突部12ｂが形成しているとともに、嵌受部11の基端に
は、嵌挿部７の先端の係合突部９ｃと係合する凹部13が
周設されている。そして、嵌受部11の内周接合面11ａに
は、上記外溝条８に対応して、外溝条８より深く形成し
た内溝条14が周設されている。なお、図示の例では、各
複数の外、内溝条８，14が鋼管矢板の管軸方向に隔設さ
れているが、それら外、内溝条８，14は、必要数だけ適
宜設けることができる。The box joint member 10 has a cylindrical shape whose outer diameter is the same as the outer diameter of the steel pipe main body 1, and the inner periphery thereof receives the fitting portion 7 of the pin joint member 5. Joint surface 7a
A fitting portion 11 having a joint surface 11a having a shape corresponding to the above is formed, and at the tip, an end surface 12a in contact with the joining end surface 9a of the base cylinder portion 6 of the pin joint 5 and the fitting insertion portion 7, and an engaging recess 9b. A projection 12b to be engaged is formed, and a concave portion 13 which engages with the engagement projection 9c at the distal end of the insertion portion 7 is provided at the base end of the fitting receiving portion 11. An inner groove 14 formed deeper than the outer groove 8 is provided around the inner peripheral joint surface 11 a of the fitting portion 11 in correspondence with the outer groove 8. In the illustrated example, a plurality of outer and inner grooves 8 and 14 are arranged in the pipe axis direction of the steel pipe sheet pile. However, the necessary number of outer and inner grooves 8 and 14 are appropriately provided. Can be.
【００１６】また、各内溝条14には、ボックス継手材10
の外周より、周方向に間隔をおいて設けられた複数のネ
ジ孔15が連通されているとともに、その内溝条14内に
は、ネジ孔15に螺合させたセット用のボルト16の操作に
よって、内溝条14内から嵌挿部７の外溝条８内と内溝条
14内に跨る位置まで螺進する円弧キー17が収容されてい
る。円弧キー17を進退させる構造は、例えば図４に示す
ように、ボルト16は、その基端部にネジ孔15と螺合する
右ネジの頭部16a を有し、先端部に円弧キー17に設けた
左ネジ（逆ネジ）と螺合する尾部16ｂを有しており、ボ
ルト16を正（右）回転させてネジ込めば円弧キー17が前
進し、逆（左）回転させれば円弧キー17が後退するよう
になっている。なお、円弧キー17を螺進させる構造はこ
れに限定されるものではない。Each inner groove 14 has a box joint 10
A plurality of threaded holes 15 provided at intervals in the circumferential direction are communicated from the outer periphery of the inside, and inside the inner groove 14, a set bolt 16 screwed into the threaded hole 15 is operated. As a result, the inner groove 14 and the inner groove 8
An arc key 17 screwing up to a position straddling inside 14 is housed. For example, as shown in FIG. 4, the bolt 16 has a head 16a of a right-hand screw screwed into the screw hole 15 at the base end thereof, and the arc key 17 at the tip end thereof, as shown in FIG. It has a tail 16b that is screwed with the left screw (reverse screw) provided. If the bolt 16 is turned forward (right) and screwed in, the arc key 17 moves forward, and if it is turned reverse (left), the arc key 17 is turned 17 is set to retreat. The structure for screwing the arc key 17 is not limited to this.
【００１７】上杭Ａ1 と下杭Ａ2 とを縦継ぎするには、
上杭Ａ1 をクレーンで吊り上げ、下杭Ａ2 の直上に運ん
で吊り降ろし、上杭Ａ1のピン継手材５を下杭Ａ2 のボ
ックス継手材10の中へ挿入して行けば、両継手材５，10
の嵌挿部７の係合凹部９ｂと係合突部９ｃが嵌受部11の
突部12ｂと凹部13とがそれぞれ係合し、上杭Ａ1と下杭
Ａ2 とが嵌合されることになる。[0017] To jointed the upper pile A 1 and A 2 Shitakui is,
The upper pile A 1 lifting with a crane, down hanging carried directly above the lower pile A 2, If we insert the pin joint member 5 of the upper pile A 1 into the box joint member 10 of Shitakui A 2, both Joint materials 5, 10
Fitting the engaging recess 9b of insertion part 7 and the projection 12b and the recess 13 of the engaging projection 9c is fitted receiving portion 11 is respectively engaged, and the upper pile A 1 and Shitakui A 2 is fitted in the Will be.
【００１８】その後は、上杭Ａ1 の回動調整により両杭
Ａ1 、Ａ2 の継手部材２，３どうしの位置を合致させて
各ボルト16を螺進させて、内溝条14に収まっている円弧
キー17を外溝条８に向け図４の矢印のように押し入れて
やる。それによって、円弧キー17は図４の鎖線で示すよ
うに、両溝条８，14に跨って契合することになり、両杭
Ａ1 、Ａ2 は円弧キー17を介して抜き差し不能に結合さ
れることになるのである。また、係合凹部９ｂと突部12
ｂ及び係合突部９ｃと凹部13の係合によって、両継手材
５，10の嵌合による結合強化が図れ、特に曲げ抗力が増
大されることになる。Thereafter, by adjusting the rotation of the upper stake A 1 , the positions of the joint members 2 and 3 of the two stakes A 1 and A 2 are matched, and the bolts 16 are screwed into the inner stakes 14. The arc key 17 is pushed toward the outer groove 8 as shown by the arrow in FIG. As a result, the arc key 17 engages over both grooves 8, 14 as shown by the chain line in FIG. 4, and the two piles A 1 and A 2 are non-pullably connected via the arc key 17. It will be. Also, the engaging recess 9b and the protrusion 12
By the engagement of the recess 13 with the engaging projection 9c and the engagement protrusion 9b, the coupling strength can be enhanced by fitting the two joint members 5, 10, and the bending resistance is particularly increased.
【００１９】それで、この円弧キー17を介しての結合で
は、引張力は外、内溝条８，14と円弧キー17の側面の側
圧応力で一方の継手５または10から円弧キー17に伝達さ
れ、せん断応力として円弧キー17の反対側に伝達され
る。そして、再び外、内溝条８，14と円弧キー17の側面
の側圧応力によって他方の継手５または10に伝達され
る。また、圧縮力は、両継手５，10の管軸に垂直な面で
圧縮応力によって伝達される。Thus, in the connection via the arc key 17, the tensile force is transmitted to the arc key 17 from one of the joints 5 or 10 by the lateral pressure stress on the outer and inner grooves 8, 14 and the side surface of the arc key 17. The shear stress is transmitted to the opposite side of the arc key 17. Then, the pressure is transmitted to the other joint 5 or 10 again by the lateral pressure stress on the outer and inner grooves 8 and 14 and the side surface of the arc key 17. The compressive force is transmitted by compressive stress on a plane perpendicular to the pipe axes of the joints 5 and 10.
【００２０】図５は、継手部材２，３を設けた部分の他
の実施例を示したもので、継手部材２，３は例えば、上
杭Ａ１においては、基部６の先端（嵌挿部７との接続位
置）近くまで延長して設けられ、また、下杭Ａ２におい
ては、嵌受部11のほぼ上端近くまで延長して設けられて
おり、嵌挿部７と嵌受部11が嵌合された際、上下両杭Ａ
１，Ａ２の継手部材２，３どおしが互いに端面を突き合
わせられるようになっている。なお、この突き合わせ部
23は、単に突き合わせたままでもよく、あるいは、突き
合わせ部23を溶接や接着剤等により結合することができ
る。[0020] FIG. 5 shows another embodiment of a portion provided with the joint members 2 and 3, the joint member 2, for example, in the upper pile A 1, the distal end of the base portion 6 (inserting portion provided to extend to the connection position) near 7, and in the lower pile a 2, it is provided so as to extend to nearly an upper end close to the fitting receiving portion 11, fitting portion 7 and the fitting receiving portion 11 When fitted, both upper and lower piles A
1, the joint members 2 and 3 Dooshi of A 2 is adapted to be butted end faces each other. In addition, this butting part
The butt 23 may be simply butted, or the butt 23 may be joined by welding, adhesive or the like.
【００２１】なお、鋼管矢板Ａ１，Ａ２の継手部材２，
３には、図示の形状のもののほか、例えば横断面Ｃ形の
継手どうしを嵌合させるものや、一方がＣ形で他方をＴ
形としたものなど各種のもの、また、シートパイルなど
のものが適用できる。The joint members 2, 2 of the steel sheet piles A 1 , A 2
3 has a shape shown in the drawing, a shape in which joints having, for example, C-shaped cross sections are fitted to each other, or one having a C shape and the other having a T shape.
Various types, such as shaped ones, and sheet piles can be applied.
【００２２】次に、鋼管杭を対象とする第２の装置につ
いて説明する。鋼管杭では、図６、図７に示すように、
上記鋼管矢板特有の継手部材２，３が設けられていな
い。Ｂ１は上杭である鋼管杭、Ｂ２は下杭である鋼管杭
で、上杭Ｂ１には、下杭Ｂ２と結合させる端部にピン継
手材５が溶接により突設され、また、下杭Ｂ２の方に
は、上杭Ｂ１と結合させる端部に、上記ピン継手材５を
受け入れるボックス継手材10が溶接により突設されてい
る。Next, a second apparatus for steel pipe piles will be described. In the steel pipe pile, as shown in FIGS.
The joint members 2 and 3 peculiar to the steel pipe sheet pile are not provided. B 1 is a steel pipe pile which is an upper pile, B 2 is a steel pipe pile which is a lower pile, and a pin joint material 5 is provided on the upper pile B 1 by welding at an end to be connected to the lower pile B 2, and , at the bottom pile B 2 is an end portion for coupling with the upper pile B 1, box joint member 10 for receiving the pin joint member 5 is protruded by welding.
【００２３】この鋼管杭Ｂ１，Ｂ２におけるピン継手材
５及びボックス継手材10の構成は、さきに説明した鋼管
矢板におけるピン継手材５及びボックス継手材10とそれ
ぞれ同様であるから、重複した説明を省略する。ただ、
この第２の装置では、継手部材２，３を有していないの
で、上、下両杭Ｂ１，Ｂ２の結合後に、継手部材２，３
どうしを接続するということがなく、したがって、第１
の装置の場合より上、下両杭Ｂ１，Ｂ２の結合作業が簡
便にできることになる。The configurations of the pin joint member 5 and the box joint member 10 in the steel pipe piles B 1 and B 2 are the same as those of the pin joint member 5 and the box joint member 10 in the steel sheet pile described above, and thus are duplicated. Description is omitted. However,
In this second device, since the joint members 2 and 3 are not provided, the joint members 2 and 3 are connected after the upper and lower piles B 1 and B 2 are joined.
No connection between them, so the first
Thus, the joining operation of the upper and lower piles B 1 and B 2 can be performed more easily than in the case of the above device.
【００２４】次に、上記第１、第２装置の共通した部分
の他の実施例について説明する。図８の実施例は、第
１、第２装置に対し、ピン継手材５の嵌挿部７の外周接
合面及びボックス継手材10の嵌受部11の内周接合面の形
状が円錐状接合面20に形成されている。なお、外、内溝
条８，14は各１条であってもよい。その他の構造及び施
工の要領については第１、第２の装置におけると同様で
あるから、その説明は省略する。Next, another embodiment common to the first and second devices will be described. In the embodiment of FIG. 8, the shape of the outer peripheral joint surface of the fitting portion 7 of the pin joint material 5 and the inner peripheral joint surface of the fitting receiving portion 11 of the box joint material 10 are conical joints with the first and second devices. Formed on surface 20. The outer and inner grooves 8, 14 may each be one. The rest of the structure and the procedure of construction are the same as those in the first and second devices, and therefore description thereof is omitted.
【００２５】図９の実施例は、ピン継手材５の嵌挿部７
の外周接合面及びボックス継手材10の嵌受部11の内周接
合面の形状がその軸線方向に階段状の接合面24に形成さ
れている。そして、各外溝条８と内溝条14は、階段条接
合面24の軸線と平行な面22にそれぞれ対向して設けられ
ている。なお、外、内溝条８，14は、それら平行面のう
ちのいずれかに1条設けたものでもよい。その他の構造
及び施工の要領にについては、上記装置におけると同様
であるから、その説明は省略する。FIG. 9 shows an embodiment in which the fitting portion 7 of the pin joint material 5 is inserted.
The outer peripheral joint surface and the inner peripheral joint surface of the fitting portion 11 of the box joint member 10 are formed into a step-like joint surface 24 in the axial direction. Each of the outer groove 8 and the inner groove 14 is provided so as to face a surface 22 parallel to the axis of the stair joint surface 24. The outer and inner grooves 8 and 14 may be provided in one of the parallel planes. The rest of the structure and the procedure of construction are the same as those in the above-described apparatus, and therefore description thereof is omitted.
【００２６】なお、上記第１、第２装置の各実施例で
は、上杭の方にピン継手材５を設け、下杭の方にボック
ス継手材10を設けた構造となっているが、これとは反対
に、上杭の方にボックス継手材10を設け、下杭の方にピ
ン継手材５を設けた構造とすることができる。また、上
記各実施例では、円弧キー17は、その複数が周方向に間
隔をおいて設けたものとなっているが、その数は適宜増
減することができる。In each of the first and second embodiments, the pin joint 5 is provided on the upper pile and the box joint 10 is provided on the lower pile. On the contrary, it is possible to adopt a structure in which the box joint member 10 is provided on the upper pile and the pin joint member 5 is provided on the lower pile. Further, in each of the above embodiments, a plurality of arc keys 17 are provided at intervals in the circumferential direction, but the number can be increased or decreased as appropriate.
【００２７】[0027]
【発明の効果】以上説明したように、本発明によれば、
鋼管矢板または鋼管杭である上杭と下杭との縦継ぎ施工
において、一方の杭に突設したピン継手材を他方の杭に
突設したボックス継手材に挿嵌して、互いにそれら内外
周の接合面を合致させ、外部からの操作により、それら
の内、外溝条に跨って円弧キーを契合させるだけの作業
によって、上下両杭の強固な縦継ぎを行うことができ、
特殊な機械や技能を用いることなく縦継ぎができるとと
もに、上杭の吊り降ろしによる芯合わせが容易に行え、
作業時間も従来の溶接やネジ継手による方法に比べて大
巾に短縮することができる。As described above, according to the present invention,
In vertical jointing of an upper pile and a lower pile, which are steel pipe sheet piles or steel pipe piles, a pin joint material protruding from one pile is inserted into a box joint material protruding from the other pile, and the inner and outer circumferences of each other are joined together. The joints of the upper and lower piles can be firmly joined by the operation of only engaging the arc key over the outer groove among them by operating from the outside,
Vertical joints can be performed without using special machines or skills, and centering can be easily performed by suspending and lowering the upper pile.
The working time can be greatly reduced as compared with the conventional welding and screw joint methods.
【００２８】また、ピン継手材とボックス継手材との接
合端面に互いに係合する凹部と突起部を設けたので、凹
部と突起部との係合によって、両継手材の嵌合による結
合が強化され、特に曲げ抗力の増大が図れる。Further, since a concave portion and a protruding portion are provided on the joint end surface of the pin joint material and the box joint material so as to engage with each other, the engagement between the two joint materials is strengthened by the engagement between the concave portion and the protruding portion. In particular, bending resistance can be increased.
【００２９】特に、鋼管矢板の縦継ぎ装置において、縦
継ぎ時に両鋼管矢板の継手部材どうしが突き合わせとな
るようにしたもの（請求項２）では、従来のような、鋼
管本体どうしの溶接後に、継手部材間に補助継手部材を
挿入して溶接する、という繁雑な手間を省くことができ
る。In particular, in a vertical joining device for steel pipe sheet piles, in which the joint members of the two steel pipe sheet piles abut each other at the time of vertical joining (claim 2), after the conventional welding of the steel pipe bodies, The troublesome work of inserting and welding an auxiliary joint member between the joint members can be omitted.
【００３０】また、ピン継手材とボックス継手材の接合
面を階段状に形成した装置（請求項４）では、縦継ぎ作
業において、位置合せが多少ずれても両継手材の挿入が
容易、確実にでき、作業の能率が向上される。In the apparatus in which the joint surface between the pin joint material and the box joint material is formed in a step shape (claim 4), in the vertical joint work, the insertion of both joint materials is easy and reliable even if the alignment is slightly shifted. Work efficiency is improved.
【図１】本発明第１の装置の一実施例を示す半部截断側
面図である。FIG. 1 is a half cutaway side view showing an embodiment of the first apparatus of the present invention.
【図２】同上杭と下杭の端部を離して示した半部截断側
面図である。FIG. 2 is a half cutaway side view showing the upper pile and the lower pile separated from each other.
【図３】同半部の平断面図である。FIG. 3 is a plan sectional view of the same half.
【図４】円弧キーによる契合部分の拡大側断面図であ
る。FIG. 4 is an enlarged side cross-sectional view of an engagement portion using an arc key.
【図５】継手部材を設けた部分の他の実施例を示す半部
截断側面図である。FIG. 5 is a half cutaway side view showing another embodiment in which a joint member is provided.
【図６】本発明第２の装置の一実施例を示す半部截断側
面図である。FIG. 6 is a half cutaway side view showing an embodiment of the second apparatus of the present invention.
【図７】同上杭と下杭の端部を離して示した半部截断側
面図である。FIG. 7 is a half cutaway side view showing the upper pile and the lower pile separated from each other.
【図８】本発明装置の他の実施例を示す側断面図であ
る。FIG. 8 is a side sectional view showing another embodiment of the device of the present invention.
【図９】同さらに他の実施例を示す側断面図である。FIG. 9 is a side sectional view showing still another embodiment.
【図１０】従来の鋼管矢板を示す側面図である。FIG. 10 is a side view showing a conventional steel pipe sheet pile.
【図１１】同平面図である。FIG. 11 is a plan view of the same.
【図１２】従来の鋼管矢板の縦継ぎにおける鋼管本体相
互の溶接結合を示す側面図である。FIG. 12 is a side view showing a conventional welded connection between steel pipe main bodies in longitudinal joining of steel pipe sheet piles.
【図１３】同補助継手部材を溶接した状態を示す側面図
である。FIG. 13 is a side view showing a state where the auxiliary joint member is welded.
Ａ、Ａ1 、Ａ2 鋼管矢板 Ｂ１，Ｂ２ 鋼管杭 １ 鋼管本体 ２、３ 継手部材 ５ ピン継手材 ６ 基部 ７ 嵌挿部 ７ａ 接合面 ８ 外溝条 ９ａ 接合端面 ９ｂ 係合凹部 ９ｃ 係合突部 10 ボックス継手材 11 嵌受部 11ａ 接合面 12ａ 端面 12ｂ 突部 13 凹部 14 内溝条 15 ネジ孔 16 ボルト 17 円弧キー 20 円錐状接合面 21 階段状接合面 23 継手材の突き合せ部A, A 1 , A 2 Steel pipe sheet piles B 1 , B 2 Steel pipe pile 1 Steel pipe main body 2, 3 Joint member 5 Pin joint material 6 Base 7 Insertion section 7 a Joint surface 8 Outer groove 9 a Joint end face 9 b Engagement recess 9 c Joint part 10 Box joint material 11 Fitting part 11a Joint surface 12a End surface 12b Projection 13 Recess 14 Inner groove 15 Screw hole 16 Bolt 17 Arc key 20 Conical joint surface 21 Stepwise joint surface 23 Joint part of joint material
フロントページの続き (72)発明者 相和 明男 千葉県市川市塩浜１−６ 株式会社クボ タ 市川工場内 (56)参考文献 特開 平５−295725（ＪＰ，Ａ) 実開 昭62−38951（ＪＰ，Ｕ) 実公 昭39−16018（ＪＰ，Ｙ１) 実公 昭49−23605（ＪＰ，Ｙ１) (58)調査した分野(Int.Cl.7，ＤＢ名) E02D 5/24 103 Continuation of the front page (72) Inventor Akio Aiwa 1-6 Shiohama, Ichikawa-shi, Chiba Kubota Corporation Ichikawa Plant (56) References JP-A-5-295725 (JP, A) JP, U) Jikken 39-16018 (JP, Y1) Jikken 49-23605 (JP, Y1) (58) Fields studied (Int. Cl. 7 , DB name) E02D 5/24 103
Claims (4)
長手方向に沿う継手部材を設けてなる鋼管矢板の、上記
鋼管本体の端部に、雄形のピン継手材を突設し、また、
この鋼管矢板と縦継ぎする他方の鋼管矢板には、その鋼
管本体の上記鋼管矢板と結合する側の端部に、上記ピン
継手材と嵌合する雌形のボックス継手材が突設されてお
り、上記ピン継手材は、鋼管本体とほぼ同径とした基筒
部に続き、基筒部より小径とした嵌挿部が延設され、嵌
挿部の基端外側に、係合凹部を周設した接合端面が形成
されているとともに、嵌挿部の先端には係合突部が周設
され、また、上記ボックス継手材は、外径が鋼管本体と
ほぼ同径とした筒状をなし、その内周には、上記ピン継
手材の嵌挿部を受け入れる嵌受部が形成され、該嵌受部
の先端には、ピン継手材の嵌挿部の基端外側の接合端面
と接する端面と、係合凹部と係合する突部が形成されて
いるとともに、嵌受部の基端には嵌挿部の先端の係合突
部と係合する凹部が周設され、そして、上記ピン継手材
の外周とボックス継手材内周の相互の接合面に、それぞ
れ対向して内、外溝条が周設され、ボックス継手材の内
溝条内には、ボックス継手の外側からの操作で螺進する
ボルトによって、外溝条と内溝条に跨って契合する円弧
キーを収容したことを特徴とする、鋼管矢板の縦継装
置。A male pin joint material protruding from an end portion of the steel pipe main body of a steel pipe sheet pile having a joint member extending along a longitudinal direction of the steel pipe main body on opposite outer surfaces of the steel pipe main body; ,
On the other steel pipe sheet pile longitudinally connected to this steel pipe sheet pile, a female box joint material to be fitted with the above-mentioned pin joint material is protrudingly provided at the end of the steel pipe main body on the side to be joined to the steel pipe sheet pile. In the pin joint material, a fitting portion having a diameter smaller than that of the base tube portion is extended from a base tube portion having substantially the same diameter as the steel pipe main body. The joint end face provided is formed, an engaging projection is provided around the tip of the fitting portion, and the box joint material has a cylindrical shape having an outer diameter substantially equal to the steel pipe main body. A receiving portion for receiving the fitting portion of the pin joint material is formed on an inner periphery thereof, and an end surface which is in contact with a joining end surface on a base outer side of the fitting portion of the pin joint material at a distal end of the fitting portion. And a projection that engages with the engagement recess is formed, and a recess that engages with the engagement projection at the tip of the insertion portion at the base end of the fitting receiving portion. Peripherally, and, on the mutual joining surface of the outer periphery of the pin joint material and the inner periphery of the box joint material, an inner groove and an outer groove are circumferentially opposed to each other, and in the inner groove of the box joint material, A longitudinal joint device for steel pipe sheet piles, wherein an arc key engaged over an outer groove and an inner groove is housed by a bolt which is screwed by operation from the outside of the box joint.
鋼管矢板を縦継ぎした際、それらの継手部材どうしが突
き合わせとなるようにして設けたことを特徴とする、請
求項１記載の鋼管矢板の縦継ぎ装置。2. The joint member of both steel pipe sheet piles to be longitudinally joined is provided such that when the steel pipe sheet piles are longitudinally joined, the joint members face each other. A vertical joint for steel pipe sheet piles.
設され、また、この鋼管杭と縦継ぎする他方の鋼管杭に
は、上記鋼管杭と結合する側の端部に、上記ピン継手材
と嵌合する雌形のボックス継手材を突設されており、上
記ピン継手材は、鋼管杭とほぼ同径とした基筒部に続
き、基筒部より小径とした嵌挿部が延設され、嵌挿部の
基端外側に、係合凹部を周設した接合端面が形成されて
いるとともに、嵌挿部の先端には係合突部が周設され、
また、上記ボックス継手材には、外径が鋼管杭とほぼ同
径とした筒状をなし、その内周には、上記ピン継手材の
嵌挿部を受け入れる嵌受部が形成され、該嵌受部の先端
には、ピン継手材の嵌挿部の基端外側の接合端面と接す
る端面と、係合凹部と係合する突部が形成されていると
ともに、嵌受部の基端には嵌挿部の先端の係合突部と係
合する凹部が周設され、そして、上記ピン継手材の外周
とボックス継手材の内周の相互の接合面に、それぞれ対
向して内、外溝条が周設され、ボックス継手材の内溝条
内には、ボックス継手材の外側からの操作で螺進するボ
ルトによって、外溝条と内溝条に跨って契合する円弧キ
ーを収容したことを特徴とする、鋼管杭の縦継ぎ装置。3. A male pin joint material is projected from the end of the steel pipe pile, and the other steel pipe pile longitudinally connected to the steel pipe pile has an end on the side connected to the steel pipe pile. , A female box joint material to be fitted with the pin joint material is protruded, and the pin joint material has a smaller diameter than the base tube portion, following the base tube portion having substantially the same diameter as the steel pipe pile. The insertion portion is extended, and a joining end surface having an engagement recess is formed on the outer side of the base end of the insertion portion, and an engagement protrusion is provided at the tip of the insertion portion,
Further, the box joint member has a cylindrical shape having an outer diameter substantially equal to that of the steel pipe pile, and a fitting receiving portion for receiving a fitting insertion portion of the pin joint material is formed on an inner periphery thereof. At the distal end of the receiving portion, an end surface that is in contact with the joining end surface outside the proximal end of the fitting insertion portion of the pin joint material, and a projection that engages with the engaging concave portion are formed. A concave portion for engaging with the engaging projection at the tip of the insertion portion is provided in the periphery, and inner and outer grooves are respectively opposed to the joint surfaces of the outer periphery of the pin joint member and the inner periphery of the box joint member. A ridge is provided around the inside of the inner groove of the box joint material, and an arc key engaged with the outer groove and the inner groove is accommodated in the inner groove of the box joint material by a bolt screwed by operation from the outside of the box joint material. A vertical joint device for steel pipe piles.
を管軸方向に沿って階段状に形成したことを特徴とす
る、請求項１乃至３のいずれか記載の鋼管矢板または鋼
管杭の縦継ぎ装置。4. The steel pipe sheet pile or steel pipe pile according to claim 1, wherein each joint surface of the pin joint material and the box joint material is formed in a step shape along the pipe axis direction. Casing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35266499A JP3336430B2 (en) | 1998-12-15 | 1999-12-13 | Vertical joints for steel pipe sheet piles |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP37542598 | 1998-12-15 | ||
| JP10-375425 | 1998-12-15 | ||
| JP35266499A JP3336430B2 (en) | 1998-12-15 | 1999-12-13 | Vertical joints for steel pipe sheet piles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000234333A JP2000234333A (en) | 2000-08-29 |
| JP3336430B2 true JP3336430B2 (en) | 2002-10-21 |
Family
ID=26579679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35266499A Expired - Lifetime JP3336430B2 (en) | 1998-12-15 | 1999-12-13 | Vertical joints for steel pipe sheet piles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3336430B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180070081A (en) | 2016-12-16 | 2018-06-26 | 주식회사 포스코 | Apparatus for connecting steel pipe |
| KR20180070481A (en) | 2016-12-16 | 2018-06-26 | 주식회사 포스코 | Apparatus for connecting steel pipe |
| KR20190077687A (en) | 2017-12-26 | 2019-07-04 | 주식회사 포스코 | Apparatus for connecting steel pipe |
| KR20190077755A (en) | 2017-12-26 | 2019-07-04 | 주식회사 포스코 | Apparatus for connecting steel pipe |
| KR20190077691A (en) | 2017-12-26 | 2019-07-04 | 주식회사 포스코 | Apparatus for connecting steel pipe |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4648572B2 (en) * | 2001-06-08 | 2011-03-09 | 株式会社クボタ | Steel pipe and steel pipe connecting structure and steel pipe connecting method |
| JP5623923B2 (en) * | 2011-01-24 | 2014-11-12 | 株式会社クボタ | Steel pipe joint structure |
| JP6238693B2 (en) * | 2013-11-18 | 2017-11-29 | 株式会社クボタ | Steel pipe sheet pile connection structure |
| AU2016360218B2 (en) * | 2015-11-27 | 2019-05-02 | Nippon Steel Corporation | Joint structure for steel pipe pile |
| JP7199152B2 (en) * | 2017-04-18 | 2023-01-05 | 株式会社クボタ | Steel pipe connecting mechanism |
| CN110258521A (en) * | 2019-06-26 | 2019-09-20 | 中国电建集团成都勘测设计研究院有限公司 | Ground-connecting-wall encloses well construction |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4923605Y1 (en) * | 1970-03-17 | 1974-06-25 | ||
| JPH0437954Y2 (en) * | 1985-08-29 | 1992-09-07 | ||
| JPH05295725A (en) * | 1992-04-21 | 1993-11-09 | Nkk Corp | Joint of steel pipe pile |
-
1999
- 1999-12-13 JP JP35266499A patent/JP3336430B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180070081A (en) | 2016-12-16 | 2018-06-26 | 주식회사 포스코 | Apparatus for connecting steel pipe |
| KR20180070481A (en) | 2016-12-16 | 2018-06-26 | 주식회사 포스코 | Apparatus for connecting steel pipe |
| KR20190077687A (en) | 2017-12-26 | 2019-07-04 | 주식회사 포스코 | Apparatus for connecting steel pipe |
| KR20190077755A (en) | 2017-12-26 | 2019-07-04 | 주식회사 포스코 | Apparatus for connecting steel pipe |
| KR20190077691A (en) | 2017-12-26 | 2019-07-04 | 주식회사 포스코 | Apparatus for connecting steel pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000234333A (en) | 2000-08-29 |
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