JP3630363B2

JP3630363B2 - Steel pipe connection equipment

Info

Publication number: JP3630363B2
Application number: JP2000012612A
Authority: JP
Inventors: 眞之祐濱本; 秀明池信; 貢大槻; 明男相和
Original assignee: Kubota Corp
Current assignee: Kubota Corp
Priority date: 2000-01-21
Filing date: 2000-01-21
Publication date: 2005-03-16
Anticipated expiration: 2020-01-21
Also published as: JP2001200596A

Description

【０００１】
【産業上の利用分野】
本発明は、角型の鋼管や丸型の鋼管を用いて、柱体や梁等の構造用耐力材、その他各種支柱の形成にあたって適用される角型、丸型鋼管どうしの接続装置に関するものである。
【０００２】
【従来の技術】
建物等各種構造物には、その耐力構造材として、断面角型や丸角の鋼管が用いられている。それらの鋼管は、製造運搬の都合で定尺のものを使用し、それを現場において継ぎ合わせ、必要な長さの柱体や梁材に形成しており、その次合わせは、従来一般に、補強材を添えて溶接あるいはボルト締めやリベットにより結合する方法が採られている。
【０００３】
しかし、上記の溶接による方法では、作業に多くの時間を要するとともに、熟練した溶接工を必要とし、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た。そこで、近年では、溶接に代わる継ぎ合わせ（接続）方法として、丸型鋼管であれば、それをネジ継手を用いて結合する方法が提案されている。
【０００４】
【発明が解決しようとする課題】
しかし、ネジ継手による接続方法は、制作が面倒でコスト高になるばかりでなく、その作業は、一方の鋼管を吊上げて他方の鋼管と芯合せをしたうえ、吊りながらネジ込むということになり、多くの手間と熟練を要するという問題がある。特に、角型鋼管の接続では、鋼管へのネジ継手の取付け方法や角型鋼管どうしの面合せとうの問題から実施するのが極めて困難である。
【０００５】
本発明は、かかる問題を解決するためになされたもので、柱体や梁その他各種支柱等における、角型や丸型の鋼管どうしの接続を、溶接やネジ継手による方法に代わって、特殊な機械や技能を用いることなく、強固にかつ簡便に行えるようにした、機械的手段による、鋼管どうしの接続装置を提供しようとするものである。
【０００７】
【課題を解決するための手段】
上記の目的を達成するための本発明の構成について、添付図面を参照して説明すると、請求項１の装置は、丸型鋼管Ｂ_１の端部に、筒状雄形のピン継手材１ｂを突設するとともに、この丸型鋼管Ｂ_１に接続する他方の丸型鋼管Ｂ_２の端部に、上記ピン継手材１ｂと嵌合する筒状雌形のボックス継手材２ｂを突設し、ピン継手材１ｂの外周面には、周方向に間隔をおいて複数の外溝条１５を設け、また、ボックス継手材２ｂの内周面には、上記外溝条１５と対向する内溝条２５を設けるとともに、この内溝条２５内に、ボックス継手材２ｂの外側からの操作で螺進するセットボルト３によって、内溝条２５と外溝条１５とに跨って契合する円弧キー５ｂを設けたことを特徴とするものである。
【０００８】
また、請求項２の装置は、請求項１の装置において、ピン継手材１を、基筒部１１に続きその先端の接合端面１３を介して、基筒部１１より小径とした嵌挿筒部１２を延設して形成し、上記接合端面１３に凹溝１４を周設するとともに、嵌挿筒部１２の先端面１５に凸条１６を周設し、また、他方のボックス継手材２を、基筒部２１に続き上記嵌挿筒部１２に外嵌する嵌受筒部２２を延設して形成し、嵌受筒部２２の先端には上記凹溝１４と嵌合する凸条２４を設けるとともに、基筒部２１と嵌受筒部２２との段部に、上記凸条１６と嵌合する凹溝２６を設けたことを特徴とするものである。
【０００９】
【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４は、断面角型の角型鋼管を対象とした第１の装置の一実施例を示し、図６、図７は、断面丸型の丸型鋼管を対象とした第２の装置の一実施例を示し、図５及び図８は第１、第２の装置に共通の他の実施例を示したものである。
【００１０】
まず、第１の装置の実施例について説明する。図１〜図４において、Ａ_１は接続する一方の角型鋼管、Ａ_２はこの角型鋼管Ａ_１と接続する他方の角型鋼管である。一方の角型鋼管Ａ_１の一端部には、角筒状をなす雄形のピン継手材１ａが溶接により突設により突設され、また、他方の角型鋼管の接続する側の端部には、上記ピン継手材１ａを受入れ嵌合する角筒状の雌形をなすボックス継手材２ａが溶接により突設されている。
【００１１】
ピン継手材１ａは、断面外形を角型鋼管Ａ_１の断面外形とほぼ同形とした基筒部１１に続き、その先端の接合端面１３を介して、基筒部１１と相似で小形とした角筒形の嵌挿筒部１２が突出して設けられ、接合端面１３には凹溝１４が周設されている。また、嵌挿筒部１２の端面１５には、係合用の凸条１６が周設されている。そして、角形をなす嵌挿筒部１２の外周の各辺面には、その軸線を横断する方向の外溝条１７が、軸線方向に間隔をおいて複数設けられている。
【００１２】
ボックス継手材２ａは、断面外形を角型鋼管Ａ_２の断面外形とほぼ同形とした基筒部２１の先端部に、上記ピン継手材１ａの嵌挿筒部１２の外周と接してこれを収容する嵌受筒部２２が設けられており、その先端にはピン継手材１ａの接合端面１３を受ける接合面２３と凹溝１４と嵌合する凸条２４が設けられ、嵌受筒部２２の、先端部には嵌挿筒部１２の先端面１５と接合する受段部２５と凸条１６と嵌合する凹条２６が設けられている。そして、嵌受筒部１２の内周の各辺面には、上記嵌挿筒部１２の外溝条１７と対向する位置に、外溝条１７より十分深くした内溝条２７が設けられ、それら条内溝条２７には、嵌受筒部２２の外周より連通するネジ孔２８が設けられている。
【００１３】
上記各内溝条２５内には、その内溝条２５内から外溝条１７と内溝条２５とに跨る位置まで移動できる杆状キー５ａが収容され、それら杆状キー５ａは、各ネジ孔２６に螺合させたセットボルト３と接続され、セットボルト３の操作によって、内溝条２５内から両溝条１７，２７に跨る位置まで螺進されるようになっている。この杆状キー５を進退させる構造は、例えば図３に示すように、セットボルト３は、その基端部にネジ孔２８と螺合する右ネジの頭部３ａを有し、先端部に杆状キー５ａに設けた左ネジ（逆ネジ）と螺合する尾部３ｂを有しており、セットボルト３を正（右）回転させてネジ込めば杆状キー５ａが前進し、逆（左）回転させれば杆状キー５ａが後退するようになっている。なお、杆状キー５ａを進退させる構造はこれに限定されるものではない。
【００１４】
両角型鋼管Ａ_１，Ａ_２を接続するには、一方の角型鋼管Ａ_１のピン継手材１ａの嵌挿筒部１２を他方の角型鋼管Ａ_２のボックス継手材Ａ_２の嵌受筒部２２内に挿入し、接合端面１３と接合面２３及び端面１５と受段部２５を接合し、各凹凸条１４，２４，１５，２５を嵌合する。それによって、両継手材１ａ，２ａを介して上杭Ａ_１と下杭Ａ_２との嵌合による結合が強化され、特に曲げ抗力が増大される。この嵌合の際は、杆状キー５ａは内溝条２５内に収めておく。嵌合後はセットボルト３を操作して、杆状キー５ａを外溝条１５内へと押進させる。それによって、杆状キー５ａは両溝条１５，２５と跨った位置に契合されることになり、両角型鋼管Ａ_１，Ａ_２は杆状キー５ａを介して分離不能に強固に結合されることになる。
【００１５】
上記の実施例では、両角型鋼管Ａ_１，Ａ_２は太さが同一のものとなっているが、本発明の装置では異なる太さの角型交換Ａ_１，Ａ_２どうしの接続にも適用できる。例えば図５に示すように、一方の鋼管Ａ_１が細形で他方の角型鋼管Ａ_２が太形であってもよい。その他の構成はさきの実施例におけると同様であるから、その説明は省略する。
【００１６】
次に、第２の装置について説明する。この装置は丸型鋼管どうしの接続を対象とする。図６、図７において、Ｂ_１は一方の丸型鋼管、Ｂ_２は他方の丸型鋼管で、それら丸型鋼管の一方Ａ_１にはピン継手材１ｂが、他方にはボックス継手材２ｂが突設されているとともに、それら継手材１ｂ，２ｂ構造は基本的に第１の装置と同様である。ただ、両継手材１ｂ，２ｂはそれぞれ円筒状に形成されている。
【００１７】
ピン継手材１ｂは、その基筒部１１が丸型鋼管Ｂ_１と外径をほぼ同様の円筒形で、それに続く嵌挿筒部１２も円筒形となっている。また、ボックス継手材２ｂの方も、基筒体２１は丸型鋼管Ｂ_２と外径がほぼ同径の円筒形をなしており、嵌受筒部２２の内周は円周面に形成される。そして、嵌挿筒部１２の外周面には、軸線方向に間隔をおき、かつ、周方向にも間隔をおいて、それぞれ複数の円弧状をなす外溝条１７と内溝条２７が対向して設けられており、１対の両溝条１７，２７内にはセットボルト３の操作で螺進する円弧キー５ｂが設けられている。その他の構成及び両鋼管Ｂ_１，Ｂの接続方法については、第１の装置におけると同様であるから、その説明は省略する。
【００１８】
この第２の装置では、嵌挿筒部１２と嵌受筒部２２の周方向に隔設されている内、外溝条１７，２７に跨って円弧キー５ｂが存在するので、嵌挿筒部１２と嵌受筒部２２とは、円弧キー５ｂを介して回転不能かつ軸方向に分離不能に強固な結合ができることになる。なお、この装置においても、一方の丸型鋼管Ａ_１と他方の丸型鋼管Ａ_２の外径を異にした異径鋼管どうしの接続を行うことができ、その場合、図５の実施例のものが適用可能である。
【００１９】
図８は、第１、第２の両装置に共通する他の実施例を示したものである。この実施例では、嵌挿筒部１２の外周が先細りのテーパー面３０に形成されており、それに接する嵌受筒部の内周も同様のテーパー面３０に形成されている。そして、それらの周面３０，３０には、軸線方向及び周方向に間隔をおいて外溝条１５と内溝条２５が対向して設けられ、それら溝条１７，２７内には杆状キー５ａ（円弧キー５ｂ）がセットボルトの操作で内溝状２７内から両溝状１７，２７に跨り位置へと進退できるようになっている。その他の構成は上記各実施例におけると同様であるから、その説明は省略する。
【００２０】
なお、上記第１、第２の装置の各実施例では、一方の鋼管にピン継手材１ａ，１ｂを設け、他方の鋼管にボックス継手材２ａ，２ｂを設けたものとなっているが、これとは反対に、一方の鋼管にボックス継手材２ａ，２ｂを、他方の鋼管にピン継手材１ａ，１ｂを設けた構造とすることができる。また、内、外溝条１７，２７は、各複数段設けられているが、これは１段以上必要な段数設けることができる。
【００２１】
本発明の装置は、建築物等の耐力構造材である柱材や梁材における鋼管部材の接続に好適であり、また、例えば、ゴルフ場やゴルフ練習場で施設されるネット張り用支柱等の各種柱類における鋼管部材の接続にも適用することができる。これらの支柱類には、図９に示すように、その基部から先端に至るにしたがい細くなるように全体をテ−パ−状に形成したものを使用することがあるが、このような支柱は一般に複数のテ−パ−鋼管をＣ_１，Ｃ_２〜を継ぎ合わせて形成している。本発明装置は、このテ−パ−鋼管Ｃ_１，Ｃ_２〜どうしの接続にも用いることができる。
【００２２】
図１０は、上記テ−パ−鋼管への適用例を示したもので、Ｃ_１は上部のテ−パ−鋼管、Ｃ_２は下部のテ−パ−鋼管で、その断面は丸形でも角形でもよい。一方のテ−パ−鋼管Ｃ_１の一端部には、筒状をなす雄形のピン継手材１ｃが溶接により突設され、また、このテ−パ−鋼管Ｃ_１と接続する他方のテ−パ−鋼管Ｃ_２の接続する側の端部には、上記ピン継手材１ｃを受入れ嵌合する筒状の雌形をなすボックス継手材２ｃが溶接により突設されている。
【００２３】
ピン継手材１ｃ及びボックス継手材２ｃの構成については、さきに説明した装置におけると同様であるからその説明は省略するが、ただ両継手材１ｃ、２ｃの外面は、テ−パ−鋼管Ｃ_１、Ｃ_２の外面のテ−パ−に沿うテ−パ−面に形成されている。なお、この装置の場合も、上記とは反対に、一方のテ−パ−鋼管Ｃ_１の方にボックス継手材２ｃを設け、他方のテ−パ−鋼管Ｃ_２の方にピン継手材１ｃを設けることができることはいうまでもない。
【００２４】
【発明の効果】
以上説明したように、本発明によれば、丸型の鋼管どうしの接続において、一方の鋼管に突設したピン継手材と他方の鋼管に突設したボックス継手材とを嵌挿して、互いにそれらの接合面に設けられた内、外溝条に収容した杆状キー（円弧キー）を、外部からの操作によって、内、外両溝条に跨って契合されるようにしたので、鋼管どうしの接続が極めて簡単な作業で能率よく確実、強固に行うことができ、従来の溶接やネジ継手の方法に比べて施工性が大幅に向上される。
【００２５】
また、嵌挿筒部と嵌受筒部の接合端面と接合面及び端面と受段部を接合し、各凹凸条を勘合する構成のものでは、それらの接合、嵌合によって、両継手材の嵌合による結合が強化され、特に曲げ抗力が増大される。
【００２６】
また、ピン継手材とボックス継手材との接合面をテーパー面に形成したものでは、両継手材の嵌め合わせにおいて軸線が多少ずれていても作業が円滑にでき、一層の能率向上となる。
【図面の簡単な説明】
【図１】本発明の第１の装置の一実施例を示す半部截断側面図である。
【図２】同平断面図である。
【図３】杆状キーによる契合部分の拡大側断面図である。
【図４】接続する鋼管を離して示した斜視図である。
【図５】本発明装置の他の実施例を示す半部側断面図である。
【図６】本発明の第２の装置の一実施例を示す半部截断側面図である。
【図７】同平断面図である。
【図８】本発明装置のさらに他の実施例を示す半部截断側面図である。
【図９】テ−パ−鋼管柱の接続例を示す概略図である。
【図１０】同接続装置の半部截断側面図である。
【符号の説明】
Ａ_１，Ａ_２角型鋼管
Ｂ_１，Ｂ_２丸型鋼管
Ｃ_１，Ｃ_２テ−パ−鋼管
１ａ，１ｂ，１ｃピン継手材
２ａ，２ｂ，２ｃボックス継手材
３セットボルト
５ａ杆状キー
５ｂ円弧キー
１１基筒部
１２嵌挿筒部
１３接合端面
１４凹条
１５端面
１６凸条
１７外溝条
２１基筒部
２２嵌受筒部
２５受段部
２６凹溝
２７内溝条
２８ネジ孔
３０テーパー面[0001]
[Industrial application fields]
TECHNICAL FIELD The present invention relates to a connecting device for connecting square and round steel pipes used for forming structural bearing materials such as columns and beams, and other various struts using square steel pipes and round steel pipes. is there.
[0002]
[Prior art]
In various structures such as buildings, steel pipes with square cross-sections and round corners are used as load-bearing structural materials. These steel pipes are of a fixed size for the convenience of production and transportation, and are joined together on site to form the required length of columns and beams. A method is adopted in which materials are attached and joined together by welding, bolting or rivets.
[0003]
However, the above welding method requires a lot of time for the work and requires a skilled welder, and the quality of the welded part is not only influenced by the weather, but also the backing ring accompanying welding, etc. It was cumbersome and costly to use metal fittings. Therefore, in recent years, as a joining (connecting) method instead of welding, a method of connecting a round steel pipe using a threaded joint has been proposed.
[0004]
[Problems to be solved by the invention]
However, the connection method using threaded joints is not only cumbersome to produce and expensive, but the work is to lift one steel pipe and align it with the other steel pipe, and then screw it while hanging. There is a problem of requiring a lot of labor and skill. In particular, it is extremely difficult to connect square steel pipes because of problems such as how to attach a threaded joint to the steel pipes and how to match the square steel pipes.
[0005]
The present invention has been made to solve such a problem, and it is possible to connect square steel and round steel pipes to each other in a column body, a beam, and other various pillars in place of a method using welding or a threaded joint. An object of the present invention is to provide a connecting device for connecting steel pipes by mechanical means, which can be firmly and easily performed without using machines and skills.
[0007]
[Means for Solving the Problems]
The configuration of the present invention for achieving the above object, with reference to the accompanying drawings, apparatus according to claim 1, the end of the round steel tube B _1, a pin joint member 1b of the tubular male while projecting, the end of the other round steel tube B ₂ to be connected to the round steel pipe B _1, projecting a tubular female box joint member 2b to be fitted with the pin joint member 1b, the pin The outer peripheral surface of the joint material 1b is provided with a plurality of outer grooves 15 at intervals in the circumferential direction, and the inner groove 25 facing the outer groove 15 on the inner peripheral surface of the box joint material 2b. In this inner groove 25, an arc key 5b that engages between the inner groove 25 and the outer groove 15 is provided by a set bolt 3 that is screwed by an operation from the outside of the box joint material 2b. It is characterized by that.
[0008]
Further, the device of claim 2 is the fitting tube portion of the device of claim 1, wherein the pin joint material 1 has a smaller diameter than the base tube portion 11 via the base tube portion 11 and the joint end surface 13 at the tip thereof. 12 is extended, and the groove 14 is provided around the joint end face 13, and the ridge 16 is provided around the front end face 15 of the fitting tube 12, and the other box joint material 2 is Then, following the base tube portion 21, a fitting receiving tube portion 22 that is externally fitted to the fitting insertion tube portion 12 is formed so as to extend, and at the tip of the fitting receiving tube portion 22, a ridge 24 that fits the groove 14. In addition, a concave groove 26 that fits with the ridge 16 is provided at the step between the base tube portion 21 and the fitting tube portion 22.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show an embodiment of a first apparatus for a square steel pipe having a square section, and FIGS. 6 and 7 show a second embodiment for a round steel pipe having a round section. FIG. 5 and FIG. 8 show another embodiment common to the first and second devices.
[0010]
First, an example of the first apparatus will be described. In FIGS 4, A ₁ is rectangular steel pipe while connected, A ₂ is the other of the square steel pipes to be connected to the square steel pipe A _1. At one end of one of the square steel pipe A _1, pin joint member 1a of the male-shaped angled tubular is protruded by projecting by welding, also the end on the side of connecting the other of the square steel pipes The box joint material 2a which makes the square tube-shaped female shape which receives and fits the said pin joint material 1a is protrudingly provided by welding.
[0011]
Pin joint member 1a, after the base tube portion 11 substantially the same shape and cross-sectional profile and cross-sectional profile of the square steel pipe A _1, through the joint end face 13 of the tip, and a small in similar to the cylindrical base portion 11 corner A cylindrical insertion tube portion 12 is provided so as to protrude, and a concave groove 14 is provided around the joint end surface 13. Further, an engaging ridge 16 is provided around the end surface 15 of the fitting tube portion 12. A plurality of outer groove strips 17 in the direction crossing the axis are provided at intervals in the axial direction on each side surface of the outer periphery of the insertion tube portion 12 having a square shape.
[0012]
Box joint member 2a is the tip of the base tube 21 in which the cross-sectional profile and cross-sectional profile of the square steel pipe A ₂ almost the same shape, accommodating it in contact with the outer periphery of the挿筒portion 12 fitting of the pin joint member 1a The fitting receiving tube portion 22 is provided, and at the tip thereof, a joining surface 23 that receives the joining end surface 13 of the pin joint material 1a and a convex ridge 24 that fits into the groove 14 are provided. The tip portion is provided with a receiving step portion 25 that joins the tip end face 15 of the fitting insertion tube portion 12 and a recess 26 that fits the protrusion 16. And, on each side surface of the inner periphery of the fitting tube 12, an inner groove 27 that is sufficiently deeper than the outer groove 17 is provided at a position facing the outer groove 17 of the fitting tube 12. The inner groove 27 is provided with a screw hole 28 communicating from the outer periphery of the fitting tube 22.
[0013]
Each inner groove 25 contains a hook-like key 5a that can move from the inner groove 25 to a position straddling the outer groove 17 and the inner groove 25. It is connected to the set bolt 3 screwed into the hole 26, and is screwed up to a position straddling both the grooves 17 and 27 from the inner groove 25 by operation of the set bolt 3. For example, as shown in FIG. 3, the set bolt 3 has a right-handed screw head 3 a that is screwed into the screw hole 28 at its base end, and has a hook at the tip. The key 5a has a tail 3b that engages with a left screw (reverse screw) provided on the key 5a. When the set bolt 3 is rotated forward (right) and screwed, the hook key 5a moves forward and reverse (left). When it is rotated, the bowl-shaped key 5a is retracted. It should be noted that the structure for advancing and retracting the bowl-shaped key 5a is not limited to this.
[0014]
In order to connect both the square steel pipes A ₁ and A ₂ , the fitting insertion cylinder portion 12 of the pin joint material 1 a of _one square steel pipe A ₁ is connected to the fitting cylinder of the box joint material A ₂ of the other square steel pipe A _2. It inserts in the part 22, the joining end surface 13, the joining surface 23, the end surface 15, and the receiving step part 25 are joined, and each uneven | corrugated strip 14, 24, 15, 25 is fitted. Thereby, coupling by fitting the upper pile A ₁ and Shitakui A ₂ is enhanced through both joint member 1a, the 2a, in particular the bending force is increased. At the time of this fitting, the bowl-shaped key 5 a is stored in the inner groove 25. After the fitting, the set bolt 3 is operated to push the hooked key 5a into the outer groove 15. As a result, the hook-like key 5a is engaged in a position straddling both the grooves 15, 25, and the double steel pipes A ₁ and A ₂ are firmly connected to each other through the hook-like key 5a so as not to be separated. It will be.
[0015]
In the above embodiment, the _double- angle steel pipes A ₁ and A ₂ have the same thickness, but the apparatus of the present invention is also applicable to the connection between the square-shaped exchanges A ₁ and A ₂ having different thicknesses. it can. For example, as shown in FIG. 5, one of the steel pipe A ₁ is the other of the square steel pipe A ₂ in elongate may be Futoshikatachi. Since other configurations are the same as those in the previous embodiment, the description thereof is omitted.
[0016]
Next, the second device will be described. This device is intended for connecting round steel pipes. 6, FIG. 7, B ₁ is one of round steel pipe, B ₂ in the other round steel tube, while A pin joint member 1b for _one of them round steel pipe, a box joint member 2b on the other The joints 1b and 2b are basically the same as those of the first device. However, both joint materials 1b and 2b are each formed in a cylindrical shape.
[0017]
Pin joint member 1b is made the base tube part 11 is in substantially the same cylindrical _one and an outer diameter round steel tube B,挿筒portion 12 fitted followed also cylindrical. Also, who box joint member 2b, group cylinder 21 is ₂ and the outer diameter round steel tube B has none nearly cylindrical with the same diameter, the inner periphery of the fitting receiving cylindrical portion 22 is formed on the circumferential surface The A plurality of arc-shaped outer groove strips 17 and inner groove strips 27 are opposed to the outer peripheral surface of the insertion tube portion 12 in the axial direction and at intervals in the circumferential direction. An arc key 5b is provided in the pair of both grooves 17, 27 to be screwed by the operation of the set bolt 3. Since the other configuration and the method for connecting both steel pipes B ₁ and B are the same as those in the first apparatus, the description thereof is omitted.
[0018]
In the second device, the arc key 5b is provided across the outer grooves 17 and 27 while being spaced apart in the circumferential direction of the fitting tube portion 12 and the fitting tube portion 22. Therefore, the fitting tube portion 12 and the fitting receiving cylinder part 22 can be firmly coupled via the arc key 5b so that they cannot rotate and cannot be separated in the axial direction. Also in this device, it is possible to perform the connection of the different-diameter steel pipe with each other was different from the outer diameter of one of the round steel pipe A ₁ and the other round steel pipe A _2, in which case the embodiment of FIG. 5 Things are applicable.
[0019]
FIG. 8 shows another embodiment common to both the first and second devices. In this embodiment, the outer periphery of the fitting tube portion 12 is formed on a tapered surface 30 that is tapered, and the inner periphery of the fitting tube portion that is in contact therewith is also formed on the same tapered surface 30. The outer circumferential surfaces 15 and 30 are provided with outer grooves 15 and inner grooves 25 facing each other at intervals in the axial direction and the circumferential direction. 5a (arc key 5b) can be moved forward and backward from the inner groove shape 27 to both the groove shapes 17, 27 by operating the set bolt. Other configurations are the same as those in each of the embodiments described above, and thus description thereof is omitted.
[0020]
In each example of the first and second apparatuses, pin joint materials 1a and 1b are provided on one steel pipe, and box joint materials 2a and 2b are provided on the other steel pipe. On the other hand, the box joint materials 2a and 2b can be provided on one steel pipe, and the pin joint materials 1a and 1b can be provided on the other steel pipe. Moreover, although the inner and outer groove strips 17 and 27 are provided in a plurality of stages, one or more stages can be provided.
[0021]
The apparatus of the present invention is suitable for connecting steel pipe members in pillar materials and beam materials that are load-bearing structural materials such as buildings. The present invention can also be applied to connection of steel pipe members in various columns. As shown in FIG. 9, these struts may be taper-shaped as a whole so as to become thinner from the base to the tip. In general, a plurality of taper steel pipes are formed by joining C ₁ and C ₂ . The device of the present invention can also be used to connect the taper steel pipes C ₁ and C ₂ to each other.
[0022]
10, the Te - Pa - shows the example of application to steel, C ₁ is the upper part of Te - Pa - steel, C ₂ the lower portion of the Te - Pa - in steel, rectangular in its cross section round But you can. Hand - Pa - At one end of the steel tube C _1, is projected pin joint member 1c of the male-type forming a tubular shape by welding, also the Te - Pa - other hand to connect the steel pipes C ₁ - Pa - At the end of the side connected to the steel pipe C _2, box joint member 2c to form a tubular female for receiving fitting the pin joint member 1c is projected by welding.
[0023]
The configurations of the pin joint material 1c and the box joint material 2c are the same as those in the apparatus described above, and therefore the description thereof will be omitted. However, the outer surfaces of both the joint materials 1c and 2c are the taper steel pipe C _1. , C ₂ of the outer surface of the Te - Pa - in along Te - Pa - are formed on the surface. Also in the case of this device, as opposed to the above, one hand - a pin joint member 1c toward the steel pipe C ₂ - Pa - a box joint member 2c toward the steel tube C ₁ is provided, the other Te - Pa Needless to say, it can be provided.
[0024]
【The invention's effect】
As described above, according to the present invention, in connecting round steel pipes, a pin joint material projecting from one steel pipe and a box joint material projecting from the other steel pipe are inserted into each other, and they are mutually connected. Since the saddle-shaped key (arc key) housed in the outer groove on the joint surface is engaged across both the inner and outer grooves by an external operation, the steel pipes The connection can be performed efficiently and reliably and firmly in an extremely simple operation, and the workability is greatly improved as compared with the conventional welding and screw joint methods.
[0025]
Moreover, in the thing of the structure which joins the joining end surface of a fitting insertion cylinder part and a fitting receiving cylinder part, a joining surface, an end surface, and a stepped part, and fits each uneven | corrugated strip, both of these joint materials are obtained by joining and fitting. The coupling due to the fitting is strengthened, in particular the bending drag is increased.
[0026]
In addition, in the case where the joint surface between the pin joint material and the box joint material is formed into a tapered surface, even if the axes are slightly deviated in fitting the two joint materials, the operation can be smoothly performed, and the efficiency is further improved.
[Brief description of the drawings]
FIG. 1 is a half cut side view showing an embodiment of a first apparatus of the present invention.
FIG. 2 is a plan sectional view of the same.
FIG. 3 is an enlarged side cross-sectional view of an engagement portion with a hook-shaped key.
FIG. 4 is a perspective view showing a steel pipe to be connected apart.
FIG. 5 is a half sectional side view showing another embodiment of the device of the present invention.
FIG. 6 is a half cut side view showing an embodiment of the second apparatus of the present invention.
FIG. 7 is a plan sectional view of the same.
FIG. 8 is a half cutaway side view showing still another embodiment of the device of the present invention.
FIG. 9 is a schematic view showing a connection example of a taper steel pipe column.
FIG. 10 is a half cut-away side view of the connection device.
[Explanation of symbols]
A ₁ and A ₂ square steel pipes B ₁ and B ₂ round steel pipes C ₁ and C ₂ Taper steel pipes 1a, 1b, 1c Pin joint material 2a, 2b, 2c Box joint material 3 Set bolt 5a Fence key 5b Arc key 11 Base tube portion 12 Insertion tube portion 13 Joint end surface 14 Concave strip 15 End surface 16 Convex Thread 17 Outer groove 21 Base tube 22 Fitting tube 25 Receiving step 26 Recessed groove 27 Inner groove 28 Screw hole 30 Tapered surface

Claims

A cylindrical male pin joint material protrudes from the end of the round steel pipe, and a cylindrical female fitting that fits the pin joint material at the end of the other round steel pipe connected to the round steel pipe. A plurality of outer grooves are provided on the outer peripheral surface of the pin joint at intervals in the circumferential direction, and the outer groove strip is provided on the inner peripheral surface of the box joint material. In addition to providing inner grooves that face each other, an arc key that engages between the inner grooves and outer grooves is provided in the inner grooves by a set bolt that is screwed by an operation from the outside of the box joint material. A steel pipe connecting device.

The pin joint material is formed by extending a fitting insertion cylinder part having a smaller diameter than the base cylinder part through the joining end face at the tip following the base cylinder part, and surrounding the concave groove on the joining end face, A ridge is provided around the distal end surface of the fitting tube portion, and the other box joint material is formed by extending a fitting tube portion that is externally fitted to the fitting tube portion following the base tube portion, A protrusion that fits with the groove is provided at the tip of the fitting tube portion, and a groove that fits with the protrusion is provided at a step between the base tube portion and the fitting tube portion. The steel pipe connection device according to claim 1.