JP2008069611A - Joint structure of steel pipe joint and steel pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint of a steel pipe such as a steel pipe pile, joining upper and lower steel pipe piles without welding at the construction site by simple work. <P>SOLUTION: This joint 3 includes an outer joint 31 and an inner joint 32, wherein a plurality of equilateral pentagonal connecting projections 315 are disposed on a raised face 3,142 of a tray-like recessed part 314 of a tray-like connecting part 311 of the outer joint 31. The connecting projections 325 of the same number as that of the connecting projections 315 are disposed on the peripheral surface of a cylindrical connecting part 321 of the inner joint 32. When the inner joint 32 is rotated with the cylindrical connecting part 321 inserted in the tray-like recessed part 314, the connecting projections 325 are pressed in between the connecting projections 315 and the base 3,141, so that the outer joint 31 and the inner joint 32 are connected to each other with slant faces of both connecting projections in contact with each other. The outer joint 31 and the inner joint 32 are fitted with a lower steel pipe pile 11 and an upper steel pipe pile 12. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本願発明は、鋼管杭、鋼管柱、液体や気体の輸送用鋼管等の鋼管の継手とその鋼管の継手を用いた鋼管の接合構造に関する。   The present invention relates to a steel pipe joint such as a steel pipe pile, a steel pipe column, a steel pipe joint for transporting liquid or gas, and a steel pipe joint structure using the joint of the steel pipe.

従来鋼管杭等の鋼管の接合には、継手を用いている。図８により、従来の鋼管杭の継手とその継手を用いた鋼管杭の接合構造について説明する。
図８（ａ）は、当金２３を用いて上下の鋼管杭１１，１２を接合する例で、当金２３は、外径が両鋼管杭の内径よりもやや小さい円筒状の鋼管からなり、金属線２４を軸方向と直交する方向に貫通させてある。当金２３は、鋼管杭１１，１２双方に挿入し、金属線２４により両鋼管杭の間に保持する。その状態で、鋼管杭１１，１２の間隙１０を溶接して両鋼管杭を接合する（特許文献１参照）。
図８（ｂ）は、ネジ型の継手を用いて上下の鋼管杭１１，１２を接合する例で、下鋼管杭１１に雄ネジ継手２１を取付け、上鋼管１２に雌ネジ継手２２を取付け、雄ネジ継手２１に雌ネジ継手２２を螺合して両鋼管杭を接合する（特許文献２参照）。 Conventionally, joints are used for joining steel pipes such as steel pipe piles. A conventional steel pipe pile joint and a steel pipe pile joint structure using the joint will be described with reference to FIG.
FIG. 8A is an example in which the upper and lower steel pipe piles 11 and 12 are joined using the abutment 23, and the abutment 23 is formed of a cylindrical steel pipe whose outer diameter is slightly smaller than the inner diameters of both the steel pipe piles. The metal wire 24 is penetrated in a direction orthogonal to the axial direction. The metal 23 is inserted into both the steel pipe piles 11 and 12 and is held between the steel pipe piles by the metal wire 24. In that state, the gap 10 between the steel pipe piles 11 and 12 is welded to join both steel pipe piles (see Patent Document 1).
FIG. 8B shows an example in which the upper and lower steel pipe piles 11 and 12 are joined using a screw-type joint. A male threaded joint 21 is attached to the lower steel pipe pile 11, and a female threaded joint 22 is attached to the upper steel pipe 12. A female threaded joint 22 is screwed into the male threaded joint 21 to join both steel pipe piles (see Patent Document 2).

特開平２００５−２８２０１５号公報Japanese Patent Laid-Open No. 2005-282015 特開平２００１−６４９５９号公報JP-A-2001-64959

図８（ａ）の継手を用いる場合、鋼管杭の施工現場において上下の鋼管杭を溶接しなければならないが、施工現場の溶接は、溶接材等を施工現場に持ち込まなければならないし、雨等の天候の影響を受け易く、かつ上下の杭を溶接している間杭の打込み作業を中止しなければならないから、作業効率が悪く、また溶接の品質が充分でない場合がある。
一方図８（ｂ）の継手を用いる場合、雄ネジ継手と雌ネジ継手を螺合するには、雄ネジと雌ネジの位置を正確に一致させなければならないが、その位置合わせは容易でなく、特に足場の悪い施工現場では大変な作業になる。また雄ネジ継手と雌ネジ継手を螺合する場合、上鋼管杭を何回も回転して雄ネジに雌ネジをねじ込まなければならなし、ネジに泥等が詰まらないように注意しなければならない。
本願発明は、従来の継手の前記問題点に鑑み、鋼管杭等の施工現場で溶接することなく、簡単に鋼管杭等の鋼管を接合できる鋼管の継手と鋼管の接合構造を提供することを目的とする。 When the joint shown in FIG. 8 (a) is used, the upper and lower steel pipe piles must be welded at the construction site of the steel pipe pile, but welding at the construction site must bring welding materials, etc. to the construction site, rain, etc. Since the pile driving operation must be stopped while the upper and lower piles are welded, the work efficiency is poor and the welding quality may not be sufficient.
On the other hand, when the joint of FIG. 8B is used, in order to screw the male screw joint and the female screw joint, the positions of the male screw and the female screw must be exactly matched, but the alignment is not easy. In particular, it will be a difficult task at construction sites with poor scaffolding. Also, when screwing a male threaded joint and a female threaded joint, the upper steel pipe pile must be rotated many times and the female thread must be screwed into the male thread, and care must be taken not to clog mud etc. .
In view of the above-described problems of conventional joints, the present invention has an object to provide a steel pipe joint and a steel pipe joint structure that can easily join steel pipes such as steel pipe piles without welding at construction sites such as steel pipe piles. And

本願発明は、その目的を達成するため、請求項１に記載の鋼管の継手は、外側継手と内側継手からなり、外側継手は、内側継手と結合する盆状結合部と鋼管取付部を備え、盆状結合部は、円形の底面と周辺の立上面からなる盆状凹部を備え、盆状凹部の立上面に複数の結合突起を設けてあり、内側継手は、外側継手と結合する筒状結合部と鋼管取付部を備え、筒状結合部の周面に外側継手の結合突起と同じ個数の結合突起を設けてあり、内側継手の結合突起は、内側継手を回転したとき外側継手の結合突起と盆状凹部の底面の間に圧入する位置に設けてあることを特徴とする。
請求項２に記載の鋼管の継手は、外側継手と内側継手からなり、外側継手は、内側継手と結合する盆状結合部と鋼管取付部を備え、盆状結合部は、円形の底面と周辺の立上面からなる盆状凹部を備え、盆状凹部の立上面に複数の結合突起を設けてあり、内側継手は、外側継手と結合する筒状結合部と鋼管取付部備え、筒状結合部の周面に外側継手の結合突起と同じ個数の結合突起を設けてあり、内側継手の結合突起は、外側継手の結合突起に係合する楔であることを特徴とする。
請求項３に記載の鋼管の継手は、請求項１に記載の鋼管の継手において、前記立上面の結合突起及び筒状結合部の周面の結合突起は、夫々上下に複数列設けてあり、筒状結合部の周面の結合突起の２列以上の結合突起は、立上面の結合突起の間に圧入することを特徴とする。
請求項４に記載の鋼管の継手は、請求項２に記載の鋼管の継手において、前記立上面の結合突起及び筒状結合部の周面の結合突起は、夫々上下に複数列設けてあることを特徴とする。
請求項５に記載の鋼管の継手は、請求項１から請求項４のいずれかの請求項に記載の鋼管の継手において、外側継手の結合突起と内側継手の結合突起は、正５角形で双方の頂点が向き合うように設けてあることを特徴とする。
請求項６に記載の鋼管の継手は、請求項１から請求項５のいずれかの請求項に記載の鋼管の継手において、外側継手と内側継手の結合の緩み防止部材を備えていることを特徴とする。
請求項７に記載の鋼管の継手は、請求項１から請求項６のいずれかの請求項に記載の鋼管の継手において、鋼管取付部に取付ける鋼管は鋼管杭であることを特徴とする。
請求項８に記載の鋼管の接合構造は、内側継手と結合する盆状結合部と鋼管取付部を備え、盆状結合部は、円形の底面と周辺の立上面からなる盆状凹部を備え、盆状凹部の立上面に複数の結合突起を設けてある外側継手の鋼管取付部に一方の鋼管を取付け、外側継手と結合する筒状結合部と鋼管取付部を備え、筒状結合部の周面に外側継手の結合突起と同じ個数の結合突起を設けてある内側継手の鋼管取付部に他方の鋼管を取付け、内側継手の結合突起を外側継手の結合突起と盆状凹部の底面の間に圧入してあることを特徴とする。
請求項９に記載の鋼管の接合構造は、請求項８に記載の鋼管の接合構造において、外側継手の鋼管取付部に取付ける鋼管及び内側継手の鋼管取付部に取付ける鋼管は、鋼管杭であることを特徴とする。 In order to achieve the object of the present invention, the steel pipe joint according to claim 1 is composed of an outer joint and an inner joint, and the outer joint includes a basin-shaped coupling portion coupled to the inner joint and a steel pipe mounting portion. The basin-shaped coupling part includes a basin-shaped concave part having a circular bottom surface and a peripheral vertical surface, and a plurality of coupling protrusions are provided on the vertical surface of the basin-shaped concave part, and the inner joint is a cylindrical joint that is coupled to the outer joint. And a steel pipe mounting portion, and the same number of coupling projections as the outer joint coupling projections are provided on the peripheral surface of the cylindrical coupling portion, and the coupling projections of the outer coupling when the inner coupling rotates It is provided in the position which press-fits between the bottom face of a basin-shaped recessed part.
The steel pipe joint according to claim 2 includes an outer joint and an inner joint, and the outer joint includes a basin-shaped coupling portion and a steel pipe mounting portion coupled to the inner joint, and the basin-shaped coupling portion includes a circular bottom surface and a peripheral portion. Provided with a plurality of coupling protrusions on the upper surface of the basin-shaped recess, and the inner joint includes a cylindrical coupling portion coupled to the outer coupling and a steel pipe mounting portion, and a cylindrical coupling portion. The same number of coupling projections as the coupling projections of the outer joint are provided on the peripheral surface of the outer joint, and the coupling projections of the inner coupling are wedges that engage with the coupling projections of the outer coupling.
The steel pipe joint according to claim 3 is the steel pipe joint according to claim 1, wherein the coupling protrusions on the upright surface and the coupling protrusions on the peripheral surface of the cylindrical coupling part are provided in a plurality of rows above and below, respectively. Two or more rows of coupling projections on the peripheral surface of the cylindrical coupling portion are press-fitted between the coupling projections on the rising surface.
The steel pipe joint according to claim 4 is the steel pipe joint according to claim 2, wherein the coupling protrusions on the upper surface and the coupling protrusions on the peripheral surface of the cylindrical coupling part are provided in a plurality of rows in the vertical direction. It is characterized by.
The steel pipe joint according to claim 5 is the steel pipe joint according to any one of claims 1 to 4, wherein the outer joint joint protrusion and the inner joint joint protrusion are both regular pentagons. The vertices are provided so that their vertices face each other.
The steel pipe joint according to claim 6 is the steel pipe joint according to any one of claims 1 to 5, further comprising a loosening prevention member for coupling the outer joint and the inner joint. And
The steel pipe joint according to claim 7 is the steel pipe joint according to any one of claims 1 to 6, wherein the steel pipe attached to the steel pipe attachment portion is a steel pipe pile.
The steel pipe joint structure according to claim 8 includes a basin-shaped coupling portion and a steel pipe mounting portion coupled to the inner joint, and the basin-shaped coupling portion includes a basin-shaped concave portion including a circular bottom surface and a peripheral vertical surface. One steel pipe is attached to the steel pipe mounting portion of the outer joint having a plurality of coupling protrusions provided on the rising surface of the basin-shaped concave portion, and includes a cylindrical coupling portion and a steel pipe mounting portion for coupling with the outer joint. Attach the other steel pipe to the steel pipe mounting part of the inner joint, which has the same number of joint protrusions as the outer joint joint protrusion on the surface, and place the inner joint joint protrusion between the outer joint joint protrusion and the bottom of the basin-shaped recess. It is characterized by being press-fitted.
The steel pipe joint structure according to claim 9 is the steel pipe joint structure according to claim 8, wherein the steel pipe attached to the steel pipe attachment portion of the outer joint and the steel pipe attached to the steel pipe attachment portion of the inner joint are steel pipe piles. It is characterized by.

本願発明の鋼管の継手は、外側継手と内側継手に結合突起を設けるだけであるから、構造が簡単で、作製も容易になる。また外側継手と内側継手の結合突起は、継手の軸方向の上下に重なるから、継手の外径は、結合突起を設けてもそれほど大きくならない。そして本願発明の鋼管の継手は、外側継手の結合突起の間に内側継手の結合突起を挿入して、内側継手をわずかに回転するのみで外側継手と内側継手を結合できるから、簡単な操作で両継手を結合でき、鋼管の接合現場において、例えば従来のネジ式継手のような高精度の位置合わせを要せずに鋼管を接合することができる。
本願発明の鋼管の継手は、内側継手の結合突起を、外側継手の結合突起と盆状凹部の底面の間に圧入するだけで、外側継手と内側継手を結合できるから、鋼管を接合するとき、施工現場で溶接する必要がない。したがって鋼管の接合作業は、簡単になり、接合時間を短縮できる。 The steel pipe joint of the present invention has a simple structure and is easy to manufacture because only the coupling protrusion is provided on the outer joint and the inner joint. Further, since the coupling protrusions of the outer joint and the inner joint overlap with each other in the axial direction of the joint, the outer diameter of the joint does not become so large even if the coupling protrusion is provided. In the steel pipe joint of the present invention, the inner joint coupling protrusion is inserted between the outer joint coupling protrusions, and the inner joint can be coupled by simply rotating the inner joint. Both joints can be joined, and steel pipes can be joined at the joining site of steel pipes without requiring high-precision positioning as in conventional threaded joints, for example.
Since the joint of the steel pipe of the present invention can join the outer joint and the inner joint simply by press-fitting the joint protrusion of the inner joint between the joint protrusion of the outer joint and the bottom surface of the basin-shaped recess, when joining the steel pipe, There is no need to weld at the construction site. Therefore, the joining operation of the steel pipe is simplified and the joining time can be shortened.

本願発明の内側継手の結合突起は、外側継手の結合突起に係合する楔としての機能を有するから、外側継手の結合突起の間に内側継手の結合突起を挿入し、内側継手の結合突起が外側継手の結合突起と盆状凹部の底面の間に圧入するまで、わずかに、内側継手を回転するのみで外側継手と内側継手を結合できる。即ち従来のネジ式継手のように内側継手を何回も回転してねじ込む必要がない。したがって鋼管の接合作業は、簡単になり、短時間で接合できる。   Since the coupling protrusion of the inner joint of the present invention functions as a wedge that engages with the coupling protrusion of the outer joint, the coupling protrusion of the inner joint is inserted between the coupling protrusions of the outer joint, The outer joint and the inner joint can be coupled only by slightly rotating the inner joint until it is press-fitted between the coupling protrusion of the outer joint and the bottom surface of the basin-shaped recess. That is, it is not necessary to rotate and screw the inner joint many times as in the conventional threaded joint. Therefore, the joining work of the steel pipe is simplified and can be joined in a short time.

本願発明の鋼管の継手は、外側継手と内側継手の結合突起に正５角形のものを用いているから、両継手を結合するとき、内側継手を左右いずれの方向に回転しても結合できる。即ち内側継手の結合突起は、左右両方向の楔として機能する。したがって鋼管の接合作業は、簡単になる。
本願発明の鋼管の継手は、緩み防止部材を備えているから、鋼管を接合した後外側継手と内側継手の結合の緩みを防止できる。
本願発明の鋼管の接合構造は、本願発明の鋼管の継手を用いて上下の鋼管を接合するから、接合作業が簡単になり、接合時間を短縮できる。 Since the steel pipe joint of the present invention uses a regular pentagonal shape for the coupling protrusions of the outer joint and the inner joint, when the two joints are joined, they can be joined by rotating the inner joint in either the left or right direction. That is, the coupling protrusion of the inner joint functions as a wedge in both the left and right directions. Therefore, the joining operation of the steel pipe is simplified.
Since the steel pipe joint of the present invention includes the loosening prevention member, it is possible to prevent loosening of the coupling between the outer joint and the inner joint after joining the steel pipe.
Since the steel pipe joint structure of the present invention joins the upper and lower steel pipes using the steel pipe joint of the present invention, the joining operation is simplified and the joining time can be shortened.

図１〜図７により本願発明の実施例を説明する。なお各図に共通の部分は、同じ符号を使用している。   An embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is used for the part common to each figure.

図１は、鋼管杭の継手によって上下の鋼管杭を接合した鋼管杭の接合構造を示す図で、図１（ａ）は、側面図、図１（ｂ）は、図１（ａ）のＸ１１部分の矢印方向の断面図、図１（ｃ）は、図１（ｂ）のＸ１３部分の矢印Ｘ１２方向の断面図である。
上鋼管杭１１と下鋼管杭１２は、継手３によって接合してある。継手３は、外側継手３１と内側継手３２からなる（両継手の構造は図２、図３でさらに説明する）。
外側継手３１は、内側継手３２と結合する盆状結合部３１１と下鋼管杭１２に挿入する鋼管杭取付部３１３を備えている。盆状結合部３１１は、内側継手３２の筒状結合部３２１を受け入れる円形の盆状凹部３１４を備え、盆状凹部３１４は、円形の底面３１４１とその周辺の立上面３１４２からなる。内側継手３２は、盆状凹部３１４に挿入する円形の筒状結合部３２１と上鋼管杭１１に挿入する鋼管杭取付部３２３を備えている。 FIG. 1 is a view showing a joining structure of steel pipe piles in which upper and lower steel pipe piles are joined by a joint of steel pipe piles, FIG. 1 (a) is a side view, and FIG. 1 (b) is X11 in FIG. 1 (a). FIG. 1C is a cross-sectional view of the portion in the arrow direction, and FIG. 1C is a cross-sectional view of the X13 portion in FIG.
The upper steel pipe pile 11 and the lower steel pipe pile 12 are joined by the joint 3. The joint 3 includes an outer joint 31 and an inner joint 32 (the structures of both joints will be further described with reference to FIGS. 2 and 3).
The outer joint 31 includes a tray-like joint portion 311 that is joined to the inner joint 32 and a steel pipe pile attachment portion 313 that is inserted into the lower steel pipe pile 12. The basin-shaped coupling portion 311 includes a circular basin-shaped concave portion 314 that receives the cylindrical coupling portion 321 of the inner joint 32, and the basin-shaped concave portion 314 includes a circular bottom surface 3141 and a peripheral rising surface 3142. The inner joint 32 includes a circular cylindrical coupling portion 321 that is inserted into the tray-shaped recess 314 and a steel pipe pile attachment portion 323 that is inserted into the upper steel pipe pile 11.

盆状凹部３１４の立上面３１４２には、複数個の結合突起３１５を所定の間隔で設け、筒状結合部３２１の周面には、結合突起３１５と同じ個数の結合突起３２５を結合突起３１５と同じ間隔で設けてある。結合突起３１５と結合突起３２５は、上下の略同じ円周に沿って配置してある。即ち結合突起３１５と結合突起３２５は、継手３の軸方向の上下に重なるように、上下の２つの円周に沿って配置してある。結合突起３１５と結合突起３２５は、正５角形で、夫々の頂点が向き合い、傾斜面が向き合うように配置してある。そして外側継手３１と内側継手３２は、双方の結合突起の傾斜面が接触した状態で結合している。
継手３によって下鋼管杭１１と上鋼管杭１２を接合したとき、結合突起３２５は、図１（ｃ）のように、結合突起３１５と盆状凹部３１４の底面３１４１の間に圧入され、結合突起３１５と結合している。即ち結合突起３２５は、結合突起３１５に係合する楔としての機能を有している。 A plurality of coupling protrusions 315 are provided at a predetermined interval on the rising surface 3142 of the basin-shaped recess 314, and the same number of coupling protrusions 325 as the coupling protrusions 315 are connected to the coupling protrusions 315 on the peripheral surface of the cylindrical coupling part 321. It is provided at the same interval. The coupling protrusion 315 and the coupling protrusion 325 are disposed along substantially the same upper and lower circumferences. That is, the coupling protrusion 315 and the coupling protrusion 325 are arranged along two upper and lower circumferences so as to overlap with each other in the axial direction of the joint 3. The coupling protrusion 315 and the coupling protrusion 325 are regular pentagons, and are arranged so that the respective apexes face each other and the inclined surfaces face each other. The outer joint 31 and the inner joint 32 are coupled with the inclined surfaces of both coupling protrusions in contact with each other.
When the lower steel pipe pile 11 and the upper steel pipe pile 12 are joined by the joint 3, the coupling protrusion 325 is press-fitted between the coupling protrusion 315 and the bottom surface 3141 of the basin-shaped recess 314 as shown in FIG. 315. In other words, the coupling protrusion 325 functions as a wedge that engages with the coupling protrusion 315.

盆状凹部３１４の立上面３１４２と筒状結合部３２１との距離（間隔）は、結合突起３１５，３２５の厚みよりも大きくし、結合突起３１５と筒状結合部３２１、及び結合突起３２５と立上面３１４２が接触しない程度に設定してある。盆状凹部３１４の立上面３１４２と筒状結合部３２１との距離（間隔）は、結合突起３１５又は結合突起３２５の厚みよりもやや大きい程度でよいから、それらの結合突起を設けても、継手３の外径は、それほど大きくならない。
図１（ｂ）の結合突起３１５と結合突起３２５は、夫々筒状結合部３２１の周面と立上面３１４２に１列配置してあるが、図１（ｄ）のように２列配置することもできる。即ち筒状結合部３２１の周面の上下に、結合突起３１５１，３１５２を配置し、立上面３１４２の上下に結合突起３２５１，３５２２を配置してある。結合突起３１５１は、結合突起３２５１と盆状凹部３１４の底面３１４１の間に圧入し、結合突起３１５２は、結合突起３２５１と結合突起３２５２の間に圧入して外側継手３１と内側継手３２を結合する。この場合、結合突起３１５１，３１５２と結合突起３２５１，３２５２の厚さは、図１（ｂ）の結合突起３１５と結合突起３２５の半分にしても、図１（ｂ）の場合と同程度の結合強度を得ることができる。結合突起３１５１，３１５２と結合突起３２５１，３２５２の厚さを薄くすると、継手３の外径は、図１（ｂ）の場合よりも小さくできる。結合突起３１５１，３１５２と結合突起３２５１，３２５２は、２列以上設けてもよい。
上鋼管杭１１の端部は、筒状結合部３２１の肩部３２２に接触しており、その接触部分を溶接してある。下鋼管杭１２の端部は、盆状結合部３１１の肩部３１２に接触しており、その接触部分を溶接してある。それらの溶接は、鋼管杭１１，１２を施工現場に持ち込む前に工場等で事前に行なうことができる。したがって溶接作業は、効率的になり、高品質の溶接が可能になる。 The distance (interval) between the rising surface 3142 of the tray-shaped recess 314 and the cylindrical coupling portion 321 is larger than the thickness of the coupling projections 315 and 325, and the coupling projection 315, the cylindrical coupling portion 321, and the coupling projection 325 stand up. The upper surface 3142 is set so as not to contact. The distance (interval) between the rising surface 3142 of the basin-shaped recess 314 and the cylindrical coupling portion 321 may be slightly larger than the thickness of the coupling protrusion 315 or the coupling protrusion 325. The outer diameter of 3 is not so large.
The coupling protrusions 315 and the coupling protrusions 325 in FIG. 1B are arranged in one row on the circumferential surface of the cylindrical coupling portion 321 and the rising surface 3142, but in two rows as shown in FIG. You can also. That is, the coupling protrusions 3151 and 3152 are disposed above and below the peripheral surface of the cylindrical coupling portion 321, and the coupling protrusions 3251 and 3522 are disposed above and below the rising surface 3142. The coupling projection 3151 is press-fitted between the coupling projection 3251 and the bottom surface 3141 of the tray-shaped recess 314, and the coupling projection 3152 is press-fitted between the coupling projection 3251 and the coupling projection 3252 to couple the outer joint 31 and the inner joint 32. . In this case, even if the thickness of the coupling protrusions 3151 and 3152 and the coupling protrusions 3251 and 3252 is half that of the coupling protrusion 315 and the coupling protrusion 325 in FIG. 1B, the same degree of coupling as in FIG. Strength can be obtained. When the thicknesses of the coupling protrusions 3151 and 3152 and the coupling protrusions 3251 and 3252 are reduced, the outer diameter of the joint 3 can be made smaller than that in the case of FIG. The coupling protrusions 3151 and 3152 and the coupling protrusions 3251 and 3252 may be provided in two or more rows.
The end portion of the upper steel pipe pile 11 is in contact with the shoulder portion 322 of the cylindrical coupling portion 321 and the contact portion is welded. The end portion of the lower steel pipe pile 12 is in contact with the shoulder portion 312 of the basin-shaped connecting portion 311 and the contact portion is welded. Such welding can be performed in advance in a factory or the like before the steel pipe piles 11 and 12 are brought into the construction site. Therefore, the welding operation is efficient and high quality welding is possible.

図２は、外側継手の構造を示す。
図２（ａ）は、平面図、図２（ｂ）は、図２（ａ）のＸ２部分の矢印方向の断面図、図２（ｃ）は、結合突起の拡大斜視図である。
盆状凹部３１４の立上面３１４２には、複数個（図では８個）の結合突起３１５を同じ間隔で設けてある。結合突起３１５と盆状凹部３１４の底面３１４１との距離（間隔）は、内側継手３２の結合突起３２５を、結合突起３１５と底面３１４１の間に圧入したとき、双方の結合突起に締付け力が加わる大きさに設定してある。結合突起３１５は、厚み（盆状凹部３１４の直径方向のサイズ）のある正５角形（将棋の駒状）で、頂点が底面３１４１側になるように設けてある。結合突起３１５は、独立したものを作製して立上面３１４２に溶接等によって取付けてもよいし、鋳造等によって外側継手３１と一体に作製してもよい。
内側継手３１の鋼管杭取付部３１３の断面は、円形であるが、四角形にすることもできる。その場合には、鋼管杭１２は、四角形のものを用いることができる。 FIG. 2 shows the structure of the outer joint.
2A is a plan view, FIG. 2B is a cross-sectional view of the X2 portion of FIG. 2A in the direction of the arrow, and FIG. 2C is an enlarged perspective view of the coupling protrusion.
A plurality (eight in the figure) of coupling protrusions 315 are provided at the same interval on the rising surface 3142 of the tray-shaped recess 314. The distance (interval) between the coupling projection 315 and the bottom surface 3141 of the basin-shaped recess 314 is such that when the coupling projection 325 of the inner joint 32 is press-fitted between the coupling projection 315 and the bottom surface 3141, a clamping force is applied to both coupling projections. The size is set. The coupling protrusion 315 is a regular pentagon (a shogi piece shape) having a thickness (the size of the basin-shaped recess 314 in the diameter direction), and is provided so that the apex is on the bottom surface 3141 side. The coupling protrusion 315 may be manufactured independently and attached to the rising surface 3142 by welding or the like, or may be manufactured integrally with the outer joint 31 by casting or the like.
The cross section of the steel pipe pile mounting portion 313 of the inner joint 31 is circular, but can also be rectangular. In that case, the steel pipe pile 12 can use a square thing.

図３は、内側継手の構造を示す。
図３（ａ）は、平面図、図３（ｂ）は、図３（ａ）の矢印Ｘ３方向の側面図、図３（ｃ）は、図３（ａ）のＸ４部分の矢印方向の断面図、図３（ｄ）は、結合突起の拡大斜視図である。
筒状結合部３２１の周面には、複数個数（８個）の結合突起３２５を設けてある。結合突起３２５の個数と間隔は、結合突起３１５と同じである。結合突起３２５の上部（５角形の頂点）と筒状結合部３２１の底面３２４の距離は、外側継手３１の結合突起３１５と盆状凹部３１４の底面３１４１の距離よりも大きくして、内側継手３１と外側継手３１を結合したとき（上下の鋼管杭を接合したとき）、結合突起３２５が外側継手３１の結合突起３１５と底面３１４１の間に圧入して、双方の結合突起に締付け力が加わる大きさに設定してある。即ち結合突起３２５が結合突起３１５に係合して楔の機能を奏する大きさに設定してある。 FIG. 3 shows the structure of the inner joint.
3 (a) is a plan view, FIG. 3 (b) is a side view in the direction of arrow X3 in FIG. 3 (a), and FIG. 3 (c) is a cross section in the direction of the arrow at X4 in FIG. 3 (a). FIG. 3D is an enlarged perspective view of the coupling protrusion.
A plurality of (eight) coupling protrusions 325 are provided on the peripheral surface of the cylindrical coupling portion 321. The number and interval of the coupling protrusions 325 are the same as those of the coupling protrusions 315. The distance between the upper part (pentagonal apex) of the coupling protrusion 325 and the bottom surface 324 of the cylindrical coupling part 321 is larger than the distance between the coupling protrusion 315 of the outer joint 31 and the bottom face 3141 of the basin-shaped recess 314, And the outer joint 31 (when the upper and lower steel pipe piles are joined), the coupling protrusion 325 is press-fitted between the coupling protrusion 315 and the bottom surface 3141 of the outer joint 31, and a tightening force is applied to both the coupling protrusions. Is set. That is, the size is set such that the coupling protrusion 325 engages with the coupling protrusion 315 and functions as a wedge.

結合突起３２５は、厚み（筒状結合部３２１の直径方向のサイズ）のある正５角形（将棋の駒状）で、頂点が外側継手３１の結合突起３１５側を向くように配置してある。結合突起３２５は、独立したものを作製して筒状結合部３２１の周面に溶接等によって取付けてもよいし、鋳造等によって内側継手３２と一体に作製してもよい。なお図３の結合突起３２５の底面は、筒状結合部３２１の底面３２４よりも高い位置にあるが、両底面の高さは同じでもよい。
内側継手３２の鋼管杭取付部３２３の断面は、円形であるが、四角形にすることもできる。その場合には、鋼管杭１１は、四角形のものを用いることができる。 The coupling protrusion 325 is a regular pentagon (a shogi piece shape) having a thickness (the size of the cylindrical coupling portion 321 in the diameter direction), and is arranged so that the apex faces the coupling protrusion 315 side of the outer joint 31. The coupling protrusion 325 may be manufactured independently and attached to the peripheral surface of the cylindrical coupling portion 321 by welding or the like, or may be fabricated integrally with the inner joint 32 by casting or the like. The bottom surface of the coupling protrusion 325 in FIG. 3 is located higher than the bottom surface 324 of the cylindrical coupling portion 321, but the heights of both bottom surfaces may be the same.
The cross section of the steel pipe pile mounting portion 323 of the inner joint 32 is circular, but can also be rectangular. In that case, the steel pipe pile 11 can use a square thing.

図４は、外側継手と内側継手の結合の仕方を説明する図である。
図４（ａ）の継手は、図２（ａ）の外側継手３１及び図３（ａ）の内側継手３２と同じである。なお図４は、外側継手３１と内側継手３２の結合突起の位置関係を分かり易くするため、便宜的に塗り分けてある。
外側継手３１と内側継手３２を結合するときは、まず図４（ｂ１）のように、外側継手３１の結合突起３１５１，３１５２，３１５３の間に、内側継手３２の結合突起３２５１，３２５２，３２５３が位置するように、盆状凹部３１４に筒状結合部３２１を挿入する。そのときの突起３１５１，３１５２，３１５３と結合突起３２５１，３２５２，３２５３の位置関係は、図４（ｂ２）のようになる。なお符号を付してない他の結合突起についても同様である。結合突起３１５１，３１５２，３１５３と結合突起３２５１，３２５２，３２５３は、図４（ｂ１）のように略同じ円周で、上下の円周に沿って図４（ｂ２）のように並ぶ。 FIG. 4 is a view for explaining how to join the outer joint and the inner joint.
The joint in FIG. 4A is the same as the outer joint 31 in FIG. 2A and the inner joint 32 in FIG. In FIG. 4, for the sake of easy understanding of the positional relationship between the coupling protrusions of the outer joint 31 and the inner joint 32, they are painted for convenience.
When the outer joint 31 and the inner joint 32 are coupled, first, as shown in FIG. 4 (b 1), the coupling protrusions 3251, 3252, 3253 of the inner coupling 32 are interposed between the coupling protrusions 3151, 3152, 3153 of the outer coupling 31. The cylindrical coupling part 321 is inserted into the basin-shaped recess 314 so as to be positioned. The positional relationship between the projections 3151, 3152, 3153 and the coupling projections 3251, 3252, 3253 at that time is as shown in FIG. The same applies to other coupling protrusions that are not provided with reference numerals. The coupling protrusions 3151, 3152, and 3153 and the coupling protrusions 3251, 3252, and 3253 have substantially the same circumference as shown in FIG. 4B1, and are arranged as shown in FIG. 4B2 along the upper and lower circumferences.

図４（ｂ１）の状態において、内側継手３２を矢印５方向へ回転すると、図４（ｃ１）のように、結合突起３２５１，３２５２，３２５３は、結合突起３１５１，３１５２，３１５３と盆状凹部３１４の底面３１４１の間に圧入され、外側継手３１と内側継手３２は結合する。そのときの結合突起３１５１，３１５２，３１５３と結合突起３２５１，３２５２，３２５３の位置関係は、図４（ｃ２）のようになり、双方の結合突起は、傾斜面が接触した状態で結合する。即ち結合突起３２５１，３２５２，３２５３は、結合突起３１５１，３１５２，３１５３に係合する楔としての機能を有している。
外側継手３１と内側継手３２の結合は、結合突起３１５１，３１５２，３１５３の間に結合突起３２５１，３２５２，３２５３を挿入して、内側継手３２をわずかに回転するのみでよい。したがって鋼管杭の接合作業は、施工現場で高精度の位置合わせを要せずに簡単に行なうことができる。 When the inner joint 32 is rotated in the direction of the arrow 5 in the state of FIG. 4B1, the coupling protrusions 3251, 3252, and 3253 are coupled to the coupling protrusions 3151, 3152, and 3153 and the tray-shaped recess 314 as illustrated in FIG. 4C1. The outer joint 31 and the inner joint 32 are joined with each other by press-fitting between the bottom surfaces 3141. The positional relationship between the coupling protrusions 3151, 3152, 3153 and the coupling protrusions 3251, 3252, 3253 at that time is as shown in FIG. 4 (c 2), and both the coupling protrusions are coupled with the inclined surfaces in contact with each other. That is, the coupling protrusions 3251, 3252, 3253 have a function as wedges that engage with the coupling protrusions 3151, 3152, 3153.
The outer joint 31 and the inner joint 32 may be coupled by inserting the coupling protrusions 3251, 3252, 3253 between the coupling protrusions 3151, 3152, 3153 and slightly rotating the inner joint 32. Therefore, joining work of steel pipe piles can be easily performed without requiring highly accurate positioning at the construction site.

図５は、外側継手と内側継手の緩み防止手段を示す。
図５（ａ）は、図４（ｃ１）の状態において緩み防止部材を挿入した状態を示し、図５（ｂ）は、図５（ａ）の結合突起と緩み防止部材の位置関係を示し、図５（ｃ）は、緩み防止部材の拡大斜視図を示す。 FIG. 5 shows the loosening prevention means for the outer joint and the inner joint.
FIG. 5 (a) shows a state where the loosening prevention member is inserted in the state of FIG. 4 (c1), FIG. 5 (b) shows the positional relationship between the coupling protrusion and the loosening prevention member of FIG. FIG. 5C shows an enlarged perspective view of the loosening prevention member.

図５（ａ）（図４（ｃ１）に相当）の状態において、外側継手３１の結合突起３１５０と３１５１の間に緩み防止部材（楔状部材）３３を挿入して、内側継手３２の結合突起３２５１が、図５（ｂ）において左側へ戻るのを、即ち内側継手３２が左側へ戻るのを防止する。緩み防止部材３３を挿入する場所は、１箇所でもよいが、２箇所以上にすれば緩みを確実に防止することができる。緩み防止部材３３は、結合突起３１５０と３１５１の間に単に挿入するのみでよいから、その取付作業は簡単である。
緩み防止部材３３は、図５（ｃ）のように、外側継手３１の結合突起３１５０や内側継手３２の結合突起３２５１と略同じ厚みで、結合突起３１５０と３１５１の間に挿入したとき、その先端部が結合突起３２５１と接触するように形成してある。 In the state of FIG. 5A (corresponding to FIG. 4C1), a loosening prevention member (wedge member) 33 is inserted between the coupling protrusions 3150 and 3151 of the outer joint 31, and the coupling protrusion 3251 of the inner joint 32 is inserted. However, it prevents the inner joint 32 from returning to the left side in FIG. The place where the loosening prevention member 33 is inserted may be one, but if it is two or more places, loosening can be reliably prevented. Since the loosening prevention member 33 has only to be inserted between the coupling protrusions 3150 and 3151, the attaching operation is simple.
As shown in FIG. 5C, the loosening prevention member 33 has the same thickness as the coupling protrusion 3150 of the outer joint 31 and the coupling protrusion 3251 of the inner joint 32, and when inserted between the coupling protrusions 3150 and 3151, the tip thereof The portion is formed so as to come into contact with the coupling protrusion 3251.

緩み防止部材３３の形状は、図５（ｃ）の形状に限らず、外側継手３１の隣接する結合突起の間に挿入したとき、その先端部が内側継手３２の結合突起と接触する形状であればよい。また緩み防止部材３３は、図５のように外側継手３１の盆状凹部の底面３１４１に向かって挿入する代わりに、外側継手３１の盆状結合部３１１の側面に、盆状凹部の底面３１４１と平行に孔を形成して、その孔に緩み防止部材３３を挿入し、緩み防止部材３３が内側継手３２の結合突起３２５１と接触するようにしてもよい。   The shape of the loosening prevention member 33 is not limited to the shape of FIG. 5 (c), and may be a shape in which the tip portion comes into contact with the coupling protrusion of the inner joint 32 when inserted between adjacent coupling protrusions of the outer joint 31. That's fine. In addition, the loosening prevention member 33 is not inserted into the bottom surface 3141 of the basin-shaped recess of the outer joint 31 as shown in FIG. A hole may be formed in parallel, and the loosening prevention member 33 may be inserted into the hole so that the loosening prevention member 33 contacts the coupling protrusion 3251 of the inner joint 32.

図６は、外側継手と内側継手の結合突起の傾斜角と両継手の結合の緩みの関係について説明する図である。
内側継手の結合突起３２５と外側継手の結合突起３１５が、傾斜角θで接触している状態において、鉛直方向の引張力（荷重）Ｔが加わったとき、引張力Ｔの反力成分をＮ１、滑り成分をＮ２、結合突起の摩擦係数をμとすると、結合突起３１５が傾斜面を滑らない条件は、
Ｎ２≦μＮ１・・・・(1)
となる。この条件を満足するとき、結合突起３２５，３１５の結合は緩まない。 FIG. 6 is a diagram for explaining the relationship between the inclination angle of the coupling protrusion of the outer joint and the inner joint and the looseness of the coupling of both joints.
In a state where the coupling protrusion 325 of the inner joint and the coupling protrusion 315 of the outer joint are in contact at an inclination angle θ, when a vertical tensile force (load) T is applied, the reaction force component of the tensile force T is N1, When the slip component is N2 and the friction coefficient of the coupling protrusion is μ, the condition that the coupling protrusion 315 does not slide on the inclined surface is as follows.
N2 ≦ μN1 (1)
It becomes. When this condition is satisfied, the coupling of the coupling protrusions 325 and 315 is not loosened.

図６において、Ｎ１＝Ｔｃｏｓθ，Ｎ２＝Ｔｓｉｎθとなり、結合突起の材料が鉄の場合の摩擦係数μは０．４５（μ＝０．４５）であるから、これらを式（１）に導入して、傾斜角θを求めると、θ≦２４．２２度となる。   In FIG. 6, N1 = T cos θ, N 2 = T sin θ, and the friction coefficient μ when the material of the coupling protrusion is iron is 0.45 (μ = 0.45). When the inclination angle θ is obtained, θ ≦ 24.22 degrees.

したがって傾斜角θが２４．２２度より小さいとき、結合突起３２５，３１５の結合は緩まない。結合突起３２５，３１５の結合は、傾斜角θが小さくなる程緩み難くなるが、傾斜角θが小さくなると、結合突起３１５，３２５の幅（円周方向のサイズ）が広くなるから、傾斜角θは１５度以上が望ましい。
なお傾斜角θが２４．２２度より小さい場合にも、図５の緩み防止部材を使用すれば、結合突起３２５，３１５の結合の緩みをより確実に防止することができる。 Therefore, when the inclination angle θ is smaller than 24.22 degrees, the coupling of the coupling protrusions 325 and 315 is not loosened. The coupling protrusions 325 and 315 are less likely to loosen as the inclination angle θ decreases. However, as the inclination angle θ decreases, the width (size in the circumferential direction) of the coupling protrusions 315 and 325 increases. Is preferably 15 degrees or more.
Even when the inclination angle θ is smaller than 24.22 degrees, the loosening prevention member of FIG. 5 can be used to more reliably prevent loosening of the coupling protrusions 325 and 315.

図７により、外側継手と内側継手の結合突起の形状、両継手の外形について説明する。
外側継手の結合突起３１５と内側継手の結合突起３２５が正５角形の場合、結合突起３２５は、図７（ａ１）のようにＸ５方向へ移動（回転）しても、また図７（ａ２）のようにＸ６方向へ移動（回転）しても、結合突起３１５の傾斜面と接触する。即ち内側継手の結合突起３２５は、両方向楔の機能を有するから、鋼管杭の接合作業が簡単になる。 With reference to FIG. 7, the shape of the coupling protrusion between the outer joint and the inner joint and the outer shape of both joints will be described.
When the coupling protrusion 315 of the outer joint and the coupling protrusion 325 of the inner joint are regular pentagons, the coupling protrusion 325 may move (rotate) in the X5 direction as shown in FIG. Even if it moves (rotates) in the X6 direction like this, it contacts the inclined surface of the coupling protrusion 315. That is, since the joint protrusion 325 of the inner joint has the function of a bidirectional wedge, the joining work of the steel pipe pile is simplified.

外側継手と内側継手の結合突起は、正５角形に限らず、図７（ｂ１）の結合突起３１５ａ，３２５ａのように台形のもの、図７（ｂ２）の結合突起３１５ｂ，３２５ｂのように長方形を傾斜させたものを用い、双方の結合突起の傾斜面が向き合うように配置してもよい。内側継手の結合突起３２５ａ，３２５ｂは、楔として使用するから、傾斜面を備えていればよく、形状は前記以外であってもよい。図７（ｂ１），（ｂ２）の結合突起は、正５角形の場合よりも傾斜面が長くなるから結合突起の強度や結合強度が大きくなる。   The coupling protrusions of the outer joint and the inner coupling are not limited to regular pentagons, but are trapezoidal like the coupling protrusions 315a and 325a in FIG. 7B1, and rectangular as the coupling protrusions 315b and 325b in FIG. 7B2. It may be arranged such that the inclined surfaces of both coupling projections face each other. Since the coupling protrusions 325a and 325b of the inner joint are used as wedges, they may be provided with an inclined surface and the shape may be other than the above. 7 (b1) and 7 (b2) have an inclined surface longer than that of a regular pentagon, and therefore the strength and the coupling strength of the coupling projection are increased.

外側継手と内側継手の結合突起は、双方の傾斜面が向き合うように配置するのが望ましいが、傾斜面は、いずれか一方の結合突起にのみ形成するだけでもよい。例えば図７（ｂ１），（ｂ２）において、傾斜面は、結合突起３２５ａ，３２５ｂにのみ形成し、結合突起３１５ａ，３１５ｂは傾斜面を形成せずに盆状凹部の底面３１４１と平行な面のみでもよい。いずれの場合にも、内側継手の結合突起３２５ａ，３２５ｂは、楔の機能を有している。ただし一方の結合突起にのみ傾斜面を形成した場合には、外側継手と内側継手の結合突起は、線接触になるから、接触面積が小さくなり結合突起の強度や結合強度が小さくなる。
外側継手の結合突起と内側継手の結合突起は、傾斜面を利用して結合するから、鋼管杭の接合作業中に逆回転して両継手の結合を解くことができるし、また解体作業において両継手の結合を解くこともできる。 The coupling protrusions of the outer joint and the inner joint are desirably arranged so that both inclined surfaces face each other, but the inclined surface may be formed only on one of the coupling protrusions. For example, in FIGS. 7B1 and 7B2, the inclined surfaces are formed only on the coupling protrusions 325a and 325b, and the coupling protrusions 315a and 315b do not form the inclined surfaces and are only surfaces parallel to the bottom surface 3141 of the basin-shaped recess. But you can. In any case, the coupling protrusions 325a and 325b of the inner joint have a wedge function. However, when an inclined surface is formed only on one of the coupling protrusions, the coupling protrusions of the outer joint and the inner joint are in line contact, so that the contact area is reduced and the strength and coupling strength of the coupling protrusion are reduced.
Since the joint projection of the outer joint and the joint projection of the inner joint are joined using an inclined surface, they can be reversely rotated during the steel pipe pile joining work to uncouple both joints. It is also possible to uncouple the joint.

図７（ｃ）の継手３は、外側継手３１の盆状結合部３１１の肩部３１２と内側継手３２の筒状結合部３２１の肩部３２２にテーパを設けてある。外側継手３１の盆状結合部３１１は、そのテーパにより厚くなるから強度が増し、かつそのテーパにより鋼管杭を下方に打込むとき抵抗が小さくなる。   In the joint 3 of FIG. 7C, a taper is provided on the shoulder portion 312 of the bonnet-like joint portion 311 of the outer joint 31 and the shoulder portion 322 of the tubular joint portion 321 of the inner joint 32. Since the bonnet-like connecting portion 311 of the outer joint 31 is thickened by the taper, the strength is increased, and the resistance is reduced when the steel pipe pile is driven downward by the taper.

前記実施例は、鋼管杭について説明したが、鋼管杭の他、鋼管柱、鋼管梁、液体、気体の輸送用鋼管等の鋼管であってもよい。   Although the said Example demonstrated the steel pipe pile, steel pipes, such as a steel pipe pillar, a steel pipe beam, a liquid, and a gas pipe for transportation other than a steel pipe pile, may be sufficient.

本願発明の実施例に係る鋼管杭の継手によって上下の鋼管杭を接合した状態を示す図である。It is a figure which shows the state which joined the upper and lower steel pipe piles with the joint of the steel pipe pile which concerns on the Example of this invention. 本願発明の実施例に係る鋼管杭の継手の外側継手の構造を示す図である。It is a figure which shows the structure of the outer joint of the joint of the steel pipe pile which concerns on the Example of this invention. 本願発明の実施例に係る鋼管杭の継手の内側継手の構造を示す図である。It is a figure which shows the structure of the inner side coupling of the coupling of the steel pipe pile which concerns on the Example of this invention. 本願発明の実施例に係る鋼管杭の継手の結合の仕方を説明する図である。It is a figure explaining the method of the coupling | bonding of the joint of the steel pipe pile which concerns on the Example of this invention. 本願発明の実施例に係る鋼管杭の継手の緩み防止手段を示す図である。It is a figure which shows the loosening prevention means of the coupling of the steel pipe pile which concerns on the Example of this invention. 本願発明の実施例に係る鋼管杭の継手の結合突起の傾斜角と継手の結合の緩みの関係を説明する図である。It is a figure explaining the relationship between the inclination angle of the joint protrusion of the joint of the steel pipe pile which concerns on the Example of this invention, and the looseness of the joint of a joint. 本願発明の実施例に係る鋼管杭の継手の結合突起の形状、継手の外形について説明する図である。It is a figure explaining the shape of the joint protrusion of the joint of the steel pipe pile which concerns on the Example of this invention, and the external shape of a joint. 従来の鋼管杭の継手の構造を示す図である。It is a figure which shows the structure of the coupling of the conventional steel pipe pile.

符号の説明Explanation of symbols

１１ 上鋼管杭
１２ 下鋼管杭
３ 継手
３１ 外側継手
３１１ 盆状結合部
３１２ 盆状結合部３１１の肩部
３１３ 鋼管杭取付部
３１４ 盆状凹部
３１４１ 底面
３１４２ 立上面
３１５ 結合突起
３２ 内側継手
３２１ 筒状結合部
３２２ 筒状結合部３２１の肩部
３２３ 鋼管杭取付部
３２４ 底面
３２５ 結合突起
３３ 緩み防止部材 11 Upper steel pipe pile 12 Lower steel pipe pile 3 Joint 31 Outer joint 311 Basin coupling part 312 Shoulder part 313 Basin coupling part 311 Steel pipe pile attachment part 314 Basin-shaped concave part 3141 Bottom face 3142 Standing upper surface 315 Coupling protrusion 32 Inner joint 321 Cylindrical Joint part 322 Shoulder part 323 of tubular joint part 321 Steel pipe pile attachment part 324 Bottom face 325 Joint projection 33 Loosening prevention member

Claims (9)

外側継手と内側継手からなり、外側継手は、内側継手と結合する盆状結合部と鋼管取付部を備え、盆状結合部は、円形の底面と周辺の立上面からなる盆状凹部を備え、盆状凹部の立上面に複数の結合突起を設けてあり、内側継手は、外側継手と結合する筒状結合部と鋼管取付部を備え、筒状結合部の周面に外側継手の結合突起と同じ個数の結合突起を設けてあり、内側継手の結合突起は、内側継手を回転したとき外側継手の結合突起と盆状凹部の底面の間に圧入する位置に設けてあることを特徴とする鋼管の継手。   It consists of an outer joint and an inner joint, and the outer joint has a basin-shaped coupling part and a steel pipe mounting part that are coupled to the inner joint, and the basin-shaped coupling part has a basin-shaped recess composed of a circular bottom surface and a peripheral vertical surface, A plurality of coupling protrusions are provided on the rising surface of the basin-shaped concave portion, and the inner joint includes a cylindrical coupling portion coupled to the outer coupling and a steel pipe mounting portion, and a coupling projection of the outer coupling is provided on the peripheral surface of the cylindrical coupling portion. The same number of coupling projections are provided, and the coupling projection of the inner joint is provided at a position where it is press-fitted between the coupling projection of the outer coupling and the bottom surface of the basin-shaped recess when the inner coupling is rotated. Fittings. 外側継手と内側継手からなり、外側継手は、内側継手と結合する盆状結合部と鋼管取付部を備え、盆状結合部は、円形の底面と周辺の立上面からなる盆状凹部を備え、盆状凹部の立上面に複数の結合突起を設けてあり、内側継手は、外側継手と結合する筒状結合部と鋼管取付部備え、筒状結合部の周面に外側継手の結合突起と同じ個数の結合突起を設けてあり、内側継手の結合突起は、外側継手の結合突起に係合する楔であることを特徴とする鋼管の継手。   It consists of an outer joint and an inner joint. A plurality of coupling protrusions are provided on the rising surface of the basin-shaped recess, and the inner joint includes a cylindrical coupling portion that couples with the outer coupling and a steel pipe mounting portion, and is the same as the coupling projection of the outer coupling on the peripheral surface of the cylindrical coupling portion. A steel pipe joint characterized in that a number of joint protrusions are provided, and the joint protrusion of the inner joint is a wedge that engages with the joint protrusion of the outer joint. 請求項１に記載の鋼管の継手において、前記立上面の結合突起及び筒状結合部の周面の結合突起は、夫々上下に複数列設けてあり、筒状結合部の周面の結合突起の２列以上の結合突起は、立上面の結合突起の間に圧入することを特徴とする鋼管の継手。   The steel pipe joint according to claim 1, wherein the coupling protrusions on the rising surface and the coupling protrusions on the circumferential surface of the cylindrical coupling part are provided in a plurality of rows in the vertical direction, and the coupling projections on the circumferential surface of the cylindrical coupling part are provided. A steel pipe joint, wherein two or more rows of coupling protrusions are press-fitted between the coupling protrusions on the rising surface. 請求項２に記載の鋼管の継手において、前記立上面の結合突起及び筒状結合部の周面の結合突起は、夫々上下に複数列設けてあることを特徴とする鋼管の継手。   3. The steel pipe joint according to claim 2, wherein a plurality of rows of the coupling protrusions on the vertical surface and the coupling protrusions on the peripheral surface of the cylindrical coupling portion are provided in the vertical direction. 請求項１から請求項４のいずれかの請求項に記載の鋼管の継手において、外側継手の結合突起と内側継手の結合突起は、正５角形で双方の頂点が向き合うように設けてあることを特徴とする鋼管の継手。   The steel pipe joint according to any one of claims 1 to 4, wherein the joint projection of the outer joint and the joint projection of the inner joint are regular pentagons and are provided so that the vertices of both faces each other. Characteristic steel pipe joint. 請求項１から請求項５のいずれかの請求項に記載の鋼管の継手において、外側継手と内側継手の結合の緩み防止部材を備えていることを特徴とする鋼管の継手。   The steel pipe joint according to any one of claims 1 to 5, further comprising a loosening prevention member for coupling the outer joint and the inner joint. 請求項１から請求項６のいずれかの請求項に記載の鋼管の継手において、鋼管取付部に取付ける鋼管は鋼管杭であることを特徴とする鋼管の継手。   The steel pipe joint according to any one of claims 1 to 6, wherein the steel pipe attached to the steel pipe attachment portion is a steel pipe pile. 内側継手と結合する盆状結合部と鋼管取付部を備え、盆状結合部は、円形の底面と周辺の立上面からなる盆状凹部を備え、盆状凹部の立上面に複数の結合突起を設けてある外側継手の鋼管取付部に一方の鋼管を取付け、外側継手と結合する筒状結合部と鋼管取付部を備え、筒状結合部の周面に外側継手の結合突起と同じ個数の結合突起を設けてある内側継手の鋼管取付部に他方の鋼管を取付け、内側継手の結合突起を外側継手の結合突起と盆状凹部の底面の間に圧入してあることを特徴とする鋼管の接合構造。   It has a basin-shaped coupling part and a steel pipe mounting part that are coupled to the inner joint, and the basin-shaped coupling part has a basin-shaped concave part composed of a circular bottom surface and a peripheral vertical surface, and a plurality of coupling protrusions are provided on the vertical surface of the basin-shaped concave part. One steel pipe is attached to the steel pipe mounting part of the provided outer joint, and it has a cylindrical joint part and a steel pipe mounting part to be coupled with the outer joint, and the same number of joints as the joint projections of the outer joint are provided on the peripheral surface of the cylindrical joint part. The other steel pipe is attached to the steel pipe mounting portion of the inner joint provided with the protrusion, and the joint protrusion of the inner joint is press-fitted between the joint protrusion of the outer joint and the bottom surface of the basin-shaped recess. Construction. 請求項８に記載の鋼管の接合構造において、外側継手の鋼管取付部に取付ける鋼管及び内側継手の鋼管取付部に取付ける鋼管は、鋼管杭であることを特徴とする鋼管の接合構造。   The steel pipe joint structure according to claim 8, wherein the steel pipe attached to the steel pipe attachment portion of the outer joint and the steel pipe attached to the steel pipe attachment portion of the inner joint are steel pipe piles.

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