JP2019049187A - Joint structure of steel pipe for installation, and connection method of steel pipe for installation - Google Patents

Joint structure of steel pipe for installation, and connection method of steel pipe for installation Download PDF

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JP2019049187A
JP2019049187A JP2018166214A JP2018166214A JP2019049187A JP 2019049187 A JP2019049187 A JP 2019049187A JP 2018166214 A JP2018166214 A JP 2018166214A JP 2018166214 A JP2018166214 A JP 2018166214A JP 2019049187 A JP2019049187 A JP 2019049187A
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joint
steel pipe
casting
screw
installation
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剛男 原田
Takeo Harada
剛男 原田
規之 川端
Noriyuki Kawabata
規之 川端
武志 児玉
Takeshi Kodama
武志 児玉
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WORLD TRADING CO Ltd
World-Trading Co Ltd
Nippon Steel Metal Products Co Ltd
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WORLD TRADING CO Ltd
World-Trading Co Ltd
Nippon Steel and Sumikin Metal Products Co Ltd
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Abstract

To provide a joint structure of a steel pipe for installation which dispenses with welding at the site, can be constructed with a simple work because of being reduced in the number of necessary parts, and facilitates management of the parts, and a connection method of a steel pipe for installation.SOLUTION: There is provided a joint structure of a steel pipe for installation where a first joint 3 mounted on a steel pipe 2 for first installation and a second joint 5 mounted on a steel pipe 4 for second installation are connected to each other. Screw threads 31 and 51 are provided on the outer periphery of the first joint 3 and the second joint 5, the screw threads 31 and 51 are positioned on the same spiral in a state in which a first joint fitting part 32 of the first joint 3 and a second joint fitting part 52 of the second joint 5 are fitted to each other, and the steel pipe 2 for first installation and the steel pipe 4 for second installation are connected to each other by being screwed with a sheath tube 6 in a form such as to straddle the outer periphery of the fitted first joint 3 and second joint 5.SELECTED DRAWING: Figure 2

Description

本発明は、打設用鋼管の継手構造及び打設用鋼管の接続方法に関するものである。   The present invention relates to a joint structure of a steel pipe for casting and a connection method of the steel pipe for casting.

回転圧入で打設され、杭やパイプルーフ等として用いられる鋼管(打設用鋼管)の接続部分は、軸方向に押し込む力を伝達するとともに、回転力を伝達することが求められる。   A connection portion of a steel pipe (casting steel pipe), which is driven by rotary press and used as a pile or a pipe roof, is required to transmit a pressing force in the axial direction and to transmit a rotational force.

また、鋼管の打設時に杭の先端に石等の障害物が当たる場合には、鋼管を少し引き抜き、打設し直すことで障害物を粉砕したり、障害物を横へずらしたりすることが行われる。このとき鋼管には、軸方向であって打設方向と反対方向の力、及び回転圧入の際の回転方向と逆方向の回転力が加えられる。   In addition, when an obstacle such as stone hits the tip of the pile at the time of casting a steel pipe, the steel pipe may be pulled out a little, and the obstacle may be crushed or repositioned by placing it back again. To be done. At this time, a force is applied to the steel pipe in the axial direction and in the direction opposite to the placing direction, and the rotational force in the direction opposite to the rotational direction in the rotational press-fit.

そのため、打設用鋼管の接続部分には、打設時とは逆方向に加わるこれらの力についても伝達することが求められる。   Therefore, it is required that the connecting portion of the casting steel pipe also transmit these forces applied in the opposite direction to that at the time of casting.

従来、こうした打設用鋼管の接続は、打設用鋼管の端部同士を溶接することで行われていた。   Conventionally, such connection of the steel pipe for placement has been performed by welding the ends of the steel pipe for placement.

また、溶接以外の種々の技術の一例として、特許文献1に記載されているように、継手同士を差し入れた後にピンで接合する機械式継手構造があった。特許文献1に記載されている構造では、ピン接合により、管軸方向への押し込みと引き抜きの力を伝達するとともに、打設時の回転方向及びこれと逆回転の力を伝達している。   Further, as an example of various techniques other than welding, as described in Patent Document 1, there is a mechanical joint structure in which joints are inserted and then joined with a pin. In the structure described in Patent Document 1, the pin joint transmits the force of pushing and pulling in the axial direction of the tube, and transmits the rotational direction at the time of placing and the force of reverse rotation thereto.

特開2009−138382号公報JP, 2009-138382, A

しかし、従来の溶接による鋼管の接続は、打設の最中に現場で溶接を行う必要があり、溶接用の設備や溶接のための作業時間が要求されるとともに、熟練した技術を要する溶接を打設現場でその都度行うのは作業効率が悪く、施工コストのかかるものであった。   However, the connection of steel pipes by conventional welding requires welding in the field during casting, which requires welding equipment and work time for welding, and also requires welding that requires skilled technology. Working at the casting site each time is not efficient and requires high construction costs.

また、特許文献1に記載されている構造は、継手同士を差し入れた後にピンで接合するため、差し入れ時に双方の継手に設けられたピンの接合部分とピンの位置とが一致することが必要であり、高い製作精度が求められ、製造コストの高いものであった。   Further, in the structure described in Patent Document 1, since the joints are joined with each other after inserting the joints, it is necessary that the joint portions of the pins provided in both joints at the time of insertion coincide with the positions of the pins. Yes, high manufacturing accuracy is required, and the manufacturing cost is high.

また、この継手同士をピンで接合する構造では、多数のピンで固定を行う必要があり、ピンやその固定用のボルトが多数必要となり、また、ピンの数だけボルト締結作業が必要となるため、部材の紛失防止のための管理コストの増加や、接続作業の煩雑化が問題となっていた。   In addition, in the structure in which the joints are joined by pins, it is necessary to fix by a large number of pins, and a large number of pins and bolts for fixing are required, and bolt fastening work is required for the number of pins. The increase in management cost for preventing the loss of members and the complication of connection work have been problems.

そこで、本発明は、上述した問題点に鑑みて案出されたものであり、現場での溶接を必要とせず、必要な部品点数が少ないため、簡易な作業で施工することのできる打設用鋼管の継手構造及び打設用鋼管の接続方法を提供することを目的とする。   Therefore, the present invention has been devised in view of the above-mentioned problems, and it is not necessary to perform welding at the site, and since the number of necessary parts is small, it can be installed in a simple operation. An object of the present invention is to provide a joint structure of a steel pipe and a connection method of the steel pipe for casting.

第1発明に係る打設用鋼管の継手構造は、第1打設用鋼管の端部に取り付けられた第1継手と、第2打設用鋼管の端部に取り付けられた第2継手とが連結されて、打設用鋼管同士が連結される打設用鋼管の継手構造であって、前記第1継手は端部に第1継手嵌合部を有し、前記第2継手は端部に前記第1継手嵌合部に嵌合する第2継手嵌合部を有し、前記第1継手及び前記第2継手の外周には、双方ともにねじ溝若しくは双方ともにねじ山が設けられ、前記第1継手の前記第1継手嵌合部と前記第2継手の前記第2継手嵌合部が嵌合した状態において、前記双方のねじ溝又は前記双方のねじ山は同一の螺旋上に位置し、嵌合させた前記第1継手及び前記第2継手の外周にまたがる態様で、前記第1継手及び前記第2継手の双方の前記ねじ溝若しくは前記ねじ山に外套管が螺合されて前記第1打設用鋼管及び前記第2打設用鋼管が連結され、前記第1継手の前記第1継手嵌合部は、端部が切り欠かれて形成される第1凹凸部であり、前記第2継手の前記第2継手嵌合部は、端部が切り欠かれて形成されて前記第1凹凸部と相補的な形状な第2凹凸部であることを特徴とする。   The joint structure of the steel pipe for placing according to the first aspect of the present invention comprises a first joint attached to an end of the first steel pipe for placing and a second joint attached to an end of the second steel pipe for placing. A joint structure of a steel pipe for driving, in which the steel pipes for driving are connected with each other, wherein the first joint has a first joint fitting portion at an end, and the second joint is at an end. A second joint fitting portion fitted to the first joint fitting portion is provided, and a screw thread or a screw thread is provided on both the outer periphery of the first joint and the second joint, In a state in which the first joint fitting portion of the first joint and the second joint fitting portion of the second joint are engaged, the both screw grooves or the both screw threads are positioned on the same spiral, In the aspect of straddling the outer peripheries of the first joint and the second joint which are fitted, the screw grooves of both the first joint and the second joint are formed. An outer pipe is screwed into the screw thread to connect the first casting steel pipe and the second casting steel pipe, and an end of the first joint fitting portion of the first joint is cut. A second uneven portion formed by being notched, and the second joint fitting portion of the second joint is formed by cutting out an end portion, and has a second shape that is complementary to the first uneven portion. It is characterized by being an uneven portion.

第2発明に係る打設用鋼管の継手構造は、第1発明において、前記第1継手の前記第1継手嵌合部と前記第2継手の前記第2継手嵌合部が嵌合した状態において、前記双方のねじ溝又は前記双方のねじ山は同一の螺旋上に位置し、かつ、前記第1打設用鋼管と前記第2打設用鋼管とは回転方向に単一の位置で位置決めされることを特徴とする。   In the joint structure of the steel pipe for driving according to the second invention, in the first invention, the first joint fitting portion of the first joint and the second joint fitting portion of the second joint are engaged with each other. The two screw grooves or the two screw threads are located on the same spiral, and the first and second driving steel pipes are positioned at a single position in the rotational direction. It is characterized by

第3発明に係る打設用鋼管の継手構造は、第2発明において、前記第1凹凸部は、複数の第1凹部を有し、一の前記第1凹部の開口径が他の前記第1凹部の開口径よりも小さく、前記第2凹凸部は、複数の第2凸部を有し、一の前記第2凸部の幅が他の前記第2凸部の幅よりも小さいことを特徴とする。   In the joint structure of a steel pipe for casting according to a third aspect of the present invention, in the second aspect, the first uneven portion has a plurality of first recesses, and an opening diameter of the first recess is one of the other first The second concavo-convex portion has a plurality of second convex portions, and the width of one of the second convex portions is smaller than the width of the other second convex portions. I assume.

第4発明に係る打設用鋼管の接続方法は、第1凹凸部を端部に有し、外周にねじ溝若しくはねじ山が形成された第1継手が端部に取り付けられた第1打設用鋼管と、前記第1凹凸部と相補的な形状である第2凹凸部を端部に有し、外周にねじ溝若しくはねじ山が形成された第2継手が端部に取り付けられた第2打設用鋼管と、を連結する打設用鋼管の接続方法であって、前記第1継手の端部が切り欠かれて形成された前記第1凹凸部と前記第2継手の端部が切り欠かれて形成された前記第2凹凸部とを嵌合し位置決めする工程と、前記前記第1凹凸部と前記第2凹凸部とが嵌合した状態で、前記第1継手と前記第2継手の外周にまたがる態様で、前記第1継手及び前記第2継手の双方の前記ねじ溝若しくは前記ねじ山に外套管を螺合し打設方向及び引き抜き方向に位置決めする工程と、を備えることを特徴とする。   The connection method of the steel pipe for casting according to the fourth invention has a first concavo-convex portion at an end, and a first joint in which a first joint having a screw groove or a thread formed on an outer periphery is attached to the end A second steel pipe having a second concavo-convex portion having a shape complementary to the first concavo-convex portion at an end thereof and a second joint having a screw groove or a thread formed on an outer periphery thereof attached to the end It is a connection method of the steel pipe for casting which connects the steel pipe for casting, Comprising: The edge part of said 1st uneven | corrugated | grooved part and the 2nd coupling which the end of the said 1st coupling cut and formed was cut off The first joint and the second joint in a step of fitting and positioning the second concavo-convex portion which is formed in a state where the first concavo-convex portion and the second concavo-convex portion are fitted. Method of screwing an outer tube into the screw groove or the screw thread of both the first joint and the second joint, in a manner of straddling the outer circumference of And characterized in that it comprises the steps of positioning the pulling direction.

第5発明に係る打設用鋼管の接続方法は、第4発明において、前記第1凹凸部と前記第2凹凸部とは回転方向における単一の位置で位置決めされることを特徴とする。   A connecting method of a steel pipe for casting according to a fifth invention is characterized in that in the fourth invention, the first concavo-convex portion and the second concavo-convex portion are positioned at a single position in the rotational direction.

上述した構成からなる本発明によれば、現場での溶接を必要とせず、必要な部品点数が少ないため、簡易な作業で施工することができ、部品の管理も容易な打設用鋼管の継手構造及び打設用鋼管の接続方法を提供することが可能となる。   According to the present invention having the above-described structure, welding is not required in the field, and the number of necessary parts is small, so that the installation can be performed with a simple operation and the management of parts is also easy. It becomes possible to provide a connection method of a structure and a steel pipe for casting.

本発明の実施形態に係る打設用鋼管の継手構造を示す側面図である。It is a side view showing joint structure of a steel pipe for casting concerning an embodiment of the present invention. 図1の打設用鋼管の継手構造の断面図である。It is sectional drawing of the coupling structure of the steel pipe for casting of FIG. 図1の打設用鋼管の継手構造から外套管を取り除いた状態を示す側面図である。It is a side view which shows the state which removed the sheath pipe from the joint structure of the steel pipe for casting of FIG. 第1継手及び第2継手を示す斜視図である。It is a perspective view which shows a 1st coupling and a 2nd coupling. 第1継手と第2継手が嵌合する様子を示す断面図である。It is sectional drawing which shows a mode that a 1st coupling and a 2nd coupling fit. 外套管を示す斜視図である。It is a perspective view which shows a mantle tube. 外套管の断面図である。It is sectional drawing of a mantle tube. 第1継手と第2継手を嵌合させた状態であって、外套管が当初位置にある状態を示す側面図である。It is a state which made the 1st joint and the 2nd joint fit, and is a side view showing the state where a jacket pipe is in an initial position. 第1継手と第2継手を嵌合させた状態であって、外套管が締め込まれる途中の状態を示す側面図である。It is a state which made the 1st joint and the 2nd joint fit, and is a side view showing the state in the middle of which a jacket pipe is tightened. 第1変形例に係る第1継手と第2継手を示す斜視図である。It is a perspective view showing the 1st joint and the 2nd joint concerning the 1st modification. 第1変形例に係る第1継手と第2継手が嵌合する様子を示す断面図である。It is sectional drawing which shows a mode that the 1st coupling and 2nd coupling which concern on a 1st modification fit. 第2変形例に係る第1継手と第2継手を示す斜視図である。It is a perspective view showing the 1st joint and the 2nd joint concerning the 2nd modification. 第2変形例に係る第1継手と第2継手が嵌合する様子を示す断面図である。It is sectional drawing which shows a mode that the 1st coupling and 2nd coupling which concern on a 2nd modification fit. 第3変形例に係る第1継手と第2継手を示す斜視図である。It is a perspective view showing the 1st joint and the 2nd joint concerning the 3rd modification. 第3変形例に係る第1継手と第2継手が嵌合する様子を示す断面図である。It is sectional drawing which shows a mode that the 1st coupling and 2nd coupling which concern on a 3rd modification fit.

以下、本発明の実施形態に係る打設用鋼管の継手構造について説明する。   Hereinafter, the joint structure of the steel pipe for placing according to the embodiment of the present invention will be described.

図1は、本発明の実施形態に係る打設用鋼管の継手構造1を示す側面図である。図2は、図1の打設用鋼管の継手構造1の断面図である。図3は、図1の打設用鋼管の継手構造1から外套管6を取り除いた状態を示す側面図である。   FIG. 1 is a side view showing a joint structure 1 of a steel pipe for casting according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the joint structure 1 of the steel pipe for casting of FIG. FIG. 3 is a side view showing a state in which the sheath pipe 6 is removed from the joint structure 1 of the steel pipe for placing shown in FIG.

本実施形態に係る打設用鋼管の継手構造1は、2本の打設用鋼管、すなわち図1左側にある第1打設用鋼管2と同図右側にある第2打設用鋼管4を、第1継手3、第2継手5及び外套管6を用いて機械的に接続する構造である。   The joint structure 1 of the steel pipe for casting according to the present embodiment comprises two steel pipes for casting, that is, a second steel pipe 4 for casting that is on the right side with the first steel pipe 2 for casting on the left side in FIG. The first joint 3, the second joint 5, and the outer tube 6 are mechanically connected to each other.

第1打設用鋼管2及び第2打設用鋼管4は、鋼管杭等の中空の鋼管であり、接続側が解放された端部となっている。   The first casting steel pipe 2 and the second casting steel pipe 4 are hollow steel pipes such as steel pipe piles, and the connection side is an open end.

図4は、第1継手3及び第2継手5を示す斜視図である。第1継手3及び第2継手5は、金属よりなる円筒状の中空の部材である。   FIG. 4 is a perspective view showing the first joint 3 and the second joint 5. The first joint 3 and the second joint 5 are cylindrical hollow members made of metal.

第1継手3は、第1打設用鋼管2の端部に溶接により取り付けられる部材である。第1継手3は、第1打設用鋼管2の内部に挿入される基端部34と、基端部34を拡径して形成される拡径部33と、拡径部33を挟んで基端部34と反対側に位置する継手嵌合部35と、を備えて構成されている。   The first joint 3 is a member attached to the end of the first casting steel pipe 2 by welding. The first joint 3 has a proximal end 34 inserted into the first casting steel pipe 2, an enlarged diameter portion 33 formed by expanding the proximal end 34, and an enlarged diameter portion 33. And a joint fitting portion 35 located on the opposite side to the proximal end portion 34.

基端部34は、第1打設用鋼管2の開口径よりも小さな径を備えている。そのため、基端部34は第1打設用鋼管2の内部に挿入可能となっている。   The base end portion 34 has a diameter smaller than the opening diameter of the first casting steel pipe 2. Therefore, the base end portion 34 can be inserted into the inside of the first casting steel pipe 2.

拡径部33は、第1打設用鋼管2の開口径よりも大きな径を備えている。そのため、第1打設用鋼管2に基端部34を挿入した場合でも、拡径部33とその先端にある継手嵌合部35は第1打設用鋼管2の内部に進入することなく、外部に露出した状態となる。   The enlarged diameter portion 33 has a diameter larger than the opening diameter of the first casting steel pipe 2. Therefore, even when the base end portion 34 is inserted into the first casting steel pipe 2, the enlarged diameter portion 33 and the joint fitting portion 35 at the tip thereof do not enter the inside of the first casting steel pipe 2. It will be exposed to the outside.

この状態で拡径部33と第1打設用鋼管2の開口部との接触部分Sが溶接されることで、第1打設用鋼管2に第1継手3が取り付けられる。   In this state, the first joint 3 is attached to the first casting steel pipe 2 by welding the contact portion S between the enlarged diameter portion 33 and the opening of the first casting steel pipe 2.

この溶接は予め工場等、施工現場以外で行われる。溶接後の部品を施工現場に搬入して施工することで、施工現場での作業工程を削減することができる。また、第1打設用鋼管2への第1継手3の取り付けが溶接により行われることから、これらの部材の固定に用いる部品点数を削減し、また、資材の管理コストも低減することができる。後述する第2打設用鋼管4と第2継手5の溶接も同様である。   This welding is performed in advance in places other than a construction site such as a factory. The work process at the construction site can be reduced by carrying the parts after welding to the construction site for construction. Further, since the attachment of the first joint 3 to the first casting steel pipe 2 is performed by welding, the number of parts used for fixing these members can be reduced, and the material management cost can also be reduced. . The same applies to the welding of the second mounting steel pipe 4 and the second joint 5 described later.

継手嵌合部35は、その先端部分に第2継手5と嵌合する凹凸部32が形成されている。この凹凸部32は、凹部324、325、326及びこれらから垂直に立設された凸部321、322、323から形成されている。   The joint fitting portion 35 is formed with a concavo-convex portion 32 fitted to the second joint 5 at a tip end portion thereof. The concavo-convex portion 32 is formed of concave portions 324, 325, 326 and convex portions 321, 322, 323 vertically erected therefrom.

凹部324、325、326は、何れも同一の深さを有している。凹部324は、他の2つの凹部325、326と比較して小さい開口径を有している。凹部325、326の開口径は同一である。   Recesses 324, 325, and 326 all have the same depth. The recess 324 has a smaller opening diameter as compared to the other two recesses 325, 326. The opening diameters of the recesses 325 and 326 are the same.

凸部321、322、323は、何れも凹部324、325、326の基底部分から見て同一の高さを有している。凸部323は、他の凸部321、322と比較して小さい幅を有している。   The protrusions 321, 322, 323 have the same height as viewed from the base of the recesses 324, 325, 326. The protrusion 323 has a smaller width than the other protrusions 321 and 322.

また、継手嵌合部35の外周には、ねじ山31が設けられている。ねじ山31は、継手嵌合部35の拡径部33側の端部近傍及び凹凸部32近傍を除き、外周全面に形成されている。なお、本発明においてはこの態様に限らず、継手嵌合部35の外周全体にねじ山31を形成してもよい。   Further, a thread 31 is provided on the outer periphery of the joint fitting portion 35. The screw thread 31 is formed on the entire outer periphery except for the vicinity of the end on the side of the enlarged diameter portion 33 of the joint fitting portion 35 and the vicinity of the concavo-convex portion 32. In the present invention, the present invention is not limited to this aspect, and the thread 31 may be formed on the entire outer periphery of the joint fitting portion 35.

第2継手5は、第2打設用鋼管4の端部に溶接により取り付けられる部材である。第2継手5は、第2打設用鋼管5の内部に挿入される基端部54と、基端部54を拡径して形成される拡径部53と、拡径部53を挟んで基端部54と反対側に位置する継手嵌合部55と、を備えて構成されている。   The second joint 5 is a member attached to the end of the second casting steel pipe 4 by welding. The second joint 5 has a base end 54 inserted into the second casting steel pipe 5, an enlarged diameter portion 53 formed by expanding the diameter of the base end 54, and an enlarged diameter portion 53. And a joint fitting portion 55 opposite to the base end portion 54.

基端部54は、第2打設用鋼管4の開口径よりも小さな径を備えている。そのため、基端部54は第2打設用鋼管4の内部に挿入可能となっている。   The base end portion 54 has a diameter smaller than the opening diameter of the second casting steel pipe 4. Therefore, the base end 54 is insertable into the inside of the second casting steel pipe 4.

拡径部53は、第2打設用鋼管4の開口径よりも大きな径を備えている。そのため、第2打設用鋼管4に基端部54を挿入した場合でも、拡径部53とその先端にある継手嵌合部55は第2打設用鋼管4の内部に進入することなく、外部に露出した状態となる。   The enlarged diameter portion 53 has a diameter larger than the opening diameter of the second casting steel pipe 4. Therefore, even when the base end portion 54 is inserted into the second casting steel pipe 4, the enlarged diameter portion 53 and the joint fitting portion 55 at the tip thereof do not enter the inside of the second casting steel pipe 4. It will be exposed to the outside.

この状態で拡径部53と第2打設用鋼管4の開口部との接触部分Sが溶接されることで、第2打設用鋼管4に第2継手5が取り付けられる。この溶接は第1継手3と第1打設用鋼管2の溶接と同様にして行われる。   The second joint 5 is attached to the second casting steel pipe 4 by welding the contact portion S between the enlarged diameter portion 53 and the opening of the second casting steel pipe 4 in this state. This welding is performed in the same manner as the welding of the first joint 3 and the first driving steel pipe 2.

継手嵌合部55は、その先端部分に第1継手3と嵌合する凹凸部52が形成されている。この凹凸部52は、第1継手の凹凸部32と相補的な形状を有し、凹部524、525、526及びこれらから垂直に立設された凸部521、522、523から形成されている。   The joint fitting portion 55 is provided at its distal end portion with a concavo-convex portion 52 to be fitted to the first joint 3. The concavo-convex portion 52 has a shape complementary to the concavo-convex portion 32 of the first joint, and is formed of concave portions 524, 525, 526 and convex portions 521, 522, 523 erected perpendicularly from these.

凹部524、525、526は、何れも同一の深さを有している。凹部524は、他の2つの凹部525、526と比較して小さい開口径を有している。凹部525、526の開口径は同一である。   Recesses 524, 525, 526 all have the same depth. The recess 524 has a smaller opening diameter compared to the other two recesses 525 and 526. The opening diameters of the recesses 525 and 526 are the same.

凸部521、522、523は、何れも凹部524、525、526の基底部分から見て同一の高さを有している。凸部523は、他の2つの凸部521、522と比較して小さい幅を有している。   The protrusions 521, 522, and 523 all have the same height when viewed from the base portion of the recesses 524, 525, and 526. The convex portion 523 has a smaller width than the other two convex portions 521 and 522.

また、継手嵌合部55の外周には、ねじ山51が設けられている。ねじ山51は、継手嵌合部55の拡径部53側端部近傍及び凹凸部52近傍を除き、外周全面に形成されている。なお、本発明においてはこの態様に限らず、継手嵌合部55の外周全体にねじ山51を形成してもよい。   Further, a thread 51 is provided on the outer periphery of the joint fitting portion 55. The screw thread 51 is formed on the entire outer periphery except for the vicinity of the end of the joint fitting portion 55 on the side of the enlarged diameter portion 53 and the vicinity of the concavo-convex portion 52. In the present invention, the present invention is not limited to this aspect, and the screw thread 51 may be formed on the entire outer periphery of the joint fitting portion 55.

上述した第1継手3の凸部321は、第2継手5の凹部526と相補的な形状を有する。第1継手3の凸部322は、第2継手5の凹部525と相補的な形状を有する。第1継手3の凸部323は、第2継手5の凹部524と相補的な形状を有する。   The convex portion 321 of the first joint 3 described above has a shape complementary to the concave portion 526 of the second joint 5. The convex portion 322 of the first joint 3 has a shape complementary to the concave portion 525 of the second joint 5. The convex portion 323 of the first joint 3 has a shape complementary to the concave portion 524 of the second joint 5.

また、第2継手5の凸部521は、第1継手3の凹部326と相補的な形状を有する。第2継手5の凸部522は、第1継手3の凹部325と相補的な形状を有する。第2継手5の凸部523は、第1継手3の凹部324と相補的な形状を有する。   Further, the convex portion 521 of the second joint 5 has a shape complementary to the concave portion 326 of the first joint 3. The convex portion 522 of the second joint 5 has a shape complementary to the concave portion 325 of the first joint 3. The convex portion 523 of the second joint 5 has a shape complementary to the concave portion 324 of the first joint 3.

上述した構成を有する第1継手3及び第2継手5は、図5に示すようにして嵌合する。図5は、第1継手3と第2継手5が嵌合する様子を示す断面図である。   The first joint 3 and the second joint 5 having the above-described configuration are fitted as shown in FIG. FIG. 5 is a cross-sectional view showing how the first joint 3 and the second joint 5 are fitted.

第1継手3と第2継手5の嵌合は、第1継手3の凹凸部32と、第2継手5の凹凸部52とを嵌合させて行われる。   The fitting of the first joint 3 and the second joint 5 is performed by fitting the uneven portion 32 of the first joint 3 and the uneven portion 52 of the second joint 5.

具体的には、第1継手3の凸部321がこれと相補的な形状を有する第2継手5の凹部526と嵌合し、第1継手3の凸部322がこれと相補的な形状を有する第2継手5の凹部525と嵌合し、第1継手3の凸部323がこれと相補的な形状を有する第2継手5の凹部524と嵌合する。   Specifically, the convex portion 321 of the first joint 3 is fitted with the concave portion 526 of the second joint 5 having a shape complementary thereto, and the convex portion 322 of the first joint 3 has a shape complementary thereto And the convex portion 323 of the first joint 3 is engaged with the concave portion 524 of the second joint 5 having a shape complementary thereto.

また、第2継手5の凸部521がこれと相補的な形状を有する第1継手3の凹部326と嵌合し、第2継手5の凸部522がこれと相補的な形状を有する第1継手3の凹部325と嵌合し、第2継手5の凸部523がこれと相補的な形状を有する第1継手3の凹部324と嵌合する。   Further, the convex portion 521 of the second joint 5 is fitted with the concave portion 326 of the first joint 3 having a shape complementary thereto, and the convex portion 522 of the second joint 5 has a shape complementary thereto The concave portion 325 of the joint 3 is fitted, and the convex portion 523 of the second joint 5 is fitted with the concave portion 324 of the first joint 3 having a shape complementary thereto.

また、ねじ山31、51の螺旋のピッチや高さは同一となっている。そして、上述した形状を有する第1継手3と第2継手5が嵌合する場合、回転方向において、単一の位置に位置決めされる。   Further, the pitches and heights of the spirals of the threads 31 and 51 are the same. And when the 1st joint 3 and the 2nd joint 5 which have the shape mentioned above fit, in a rotation direction, it is positioned in a single position.

この回転方向における単一の位置において第1継手3と第2継手5とが嵌合した状態で、ねじ山31とねじ山51とは、同一の螺旋上に位置した状態、すなわちねじ山31が描く螺旋の延長線上にねじ山51が位置した状態となるように形成されている。   With the first joint 3 and the second joint 5 fitted at a single position in this rotational direction, the screw thread 31 and the screw thread 51 are positioned on the same spiral, that is, the screw thread 31 is The screw thread 51 is formed so as to be positioned on the extension of the drawing spiral.

図6は、外套管6を示す斜視図である。図7は外套管6の断面図である。外套管6は、内部にねじ溝62が形成され、一端部の開口部がテーパ状の端部63となっている円筒状の金属製の部材である。   FIG. 6 is a perspective view showing the sheath tube 6. FIG. 7 is a cross-sectional view of the sheath tube 6. The sheath tube 6 is a cylindrical metal member in which a thread groove 62 is formed inside and an opening at one end is a tapered end 63.

外套管6は、第1継手3の継手嵌合部35及び第2継手5の継手嵌合部55を内部に相通可能な径を有し、かつ、内部に形成されたねじ溝62は、継手嵌合部35、55のねじ山31、51と同一のピッチを有し、螺合可能となっている。   The outer tube 6 has a diameter that allows the joint fitting portion 35 of the first joint 3 and the joint fitting portion 55 of the second joint 5 to be compatible with each other, and the screw groove 62 formed inside is a joint It has the same pitch as the threads 31 and 51 of the fitting portions 35 and 55, and can be screwed.

この外套管6は、第1継手3と第2継手5とが嵌合した状態で、これらにまたがるように螺合される。上述したように、第1継手3の継手嵌合部35の外周に形成されているねじ山31と、第2継手5の継手嵌合部55の外周に形成されているねじ山51とは、同一の螺旋上に位置した状態になっているので、外套管6はこれらのねじ山31、51と螺合して、嵌合した状態の第1継手3と第2継手5とを固定することができる。   The outer tube 6 is screwed so as to straddle the first joint 3 and the second joint 5 in a fitted state. As described above, the screw thread 31 formed on the outer periphery of the joint fitting portion 35 of the first joint 3 and the screw thread 51 formed on the outer periphery of the joint fitting portion 55 of the second joint 5 Since they are positioned on the same spiral, the outer tube 6 is screwed with these threads 31 and 51 to fix the first joint 3 and the second joint 5 in the fitted state. Can.

また、外套管6の先端部がテーパ状の端部63となっていて、後述する第2継手5への螺合の際にガイドとして機能するため、第2継手5への螺合をスムーズに行うことができる。   In addition, since the tip end portion of the outer tube 6 is a tapered end portion 63 and functions as a guide at the time of screwing to the second joint 5 described later, the screwing to the second joint 5 is made smooth It can be carried out.

次に、本実施形態に係る打設用鋼管の継手構造1が形成される様子について説明する。   Next, a mode that the joint structure 1 of the steel pipe for casting which concerns on this embodiment is formed is demonstrated.

図8は、第1継手3と第2継手5を嵌合させた状態であって、外套管6が当初位置にある状態を示す側面図である。   FIG. 8 is a side view showing a state where the first joint 3 and the second joint 5 are fitted, and the outer tube 6 is in the initial position.

打設用鋼管の継手構造1の形成工程では、まず、図8に示すように、外套管6が第1継手3の継手嵌合部35に嵌合される。このとき外套管6は、拡径部33に当接する位置(当初位置)において嵌合される。   In the step of forming the joint structure 1 of the driving steel pipe, first, as shown in FIG. 8, the outer tube 6 is fitted to the joint fitting portion 35 of the first joint 3. At this time, the outer tube 6 is fitted at a position (initial position) in contact with the enlarged diameter portion 33.

このとき、継手嵌合部33の凹凸部32は、外套管6から露出した状態となっている。こうした状態で第1継手3が第2継手5と嵌合される。この嵌合は、外套管6から露出した第1継手3の凹凸部32と、第2継手5の凹凸部52とが嵌合することにより行われる。   At this time, the uneven portion 32 of the joint fitting portion 33 is in a state of being exposed from the sheath tube 6. In this state, the first joint 3 is fitted with the second joint 5. This fitting is performed by fitting the uneven portion 32 of the first joint 3 exposed from the outer tube 6 and the uneven portion 52 of the second joint 5.

第1継手3の凹凸部32と第2継手5の凹凸部52が嵌合することにより、継手構造1について、回転方向における単一の位置に位置決めがなされた状態となる。   By fitting the concavo-convex part 32 of the first joint 3 and the concavo-convex part 52 of the second joint 5, the joint structure 1 is positioned at a single position in the rotational direction.

第1継手3の凹凸部32と第2継手5は、回転方向においてこの単一の位置以外の位置では嵌合することができないようになっている。そのため、ねじ山31、51は必ず同一の螺旋上に位置することができ、以下に続く外套管6の締め込みが可能となっている。   The uneven portion 32 of the first joint 3 and the second joint 5 can not be fitted at positions other than the single position in the rotational direction. Therefore, the threads 31, 51 can always be located on the same spiral, and the following tightening of the outer tube 6 is possible.

次に、外套管6の締め込みが行われる。図9は、第1継手3と第2継手5を嵌合させた状態であって、外套管6が締め込まれる途中の状態を示す側面図である。   Next, tightening of the outer tube 6 is performed. FIG. 9 is a side view showing a state in which the first joint 3 and the second joint 5 are fitted and in the process of tightening the outer tube 6.

嵌合した状態にある第1継手3と第2継手5に対して、当初位置から図9の状態を経て、図1に示す第2継手5の拡径部55に当接する位置に至るまで、外套管6の締め込みが行われる。   With respect to the first joint 3 and the second joint 5 in the fitted state, from the initial position through the state of FIG. 9 to the position where the enlarged diameter portion 55 of the second joint 5 shown in FIG. Tightening of the sheath tube 6 is performed.

外套管6の締め込みは、外套管6を図8及び図9に示す矢印の方向に回転させ、その内部に形成されたねじ溝62と、第1継手3の継手嵌合部35の外周に形成されたねじ山31及び第2継手5の継手嵌合部55の外周に形成されたねじ山51とを螺合させることで行われる。   The tightening of the outer tube 6 rotates the outer tube 6 in the direction of the arrow shown in FIGS. 8 and 9, and the screw groove 62 formed in the inside and the outer periphery of the joint fitting portion 35 of the first joint 3 The screw thread 31 and the screw thread 51 formed on the outer periphery of the joint fitting portion 55 of the second joint 5 are screwed together.

こうして第1継手及び第2継手の外周にまたがる態様で外套管6が螺合することで、継手構造1について、打設方向及び引き抜き方向についても位置決めがなされた状態となる。   In this manner, by screwing the outer tube 6 across the outer periphery of the first joint and the second joint, the joint structure 1 is also positioned in the placing direction and the drawing direction.

外套管6が第2継手5の拡径部55に当接する位置まで締め込まれた状態では、継手嵌合部35、55の外周に形成されたねじ山31、51は、外套管6に覆われ外部から視認できない状態となり、使用に伴うねじ山31、51の破損を効果的に防止することができる。   In a state in which the outer tube 6 is tightened to a position where the outer tube 6 abuts on the enlarged diameter portion 55 of the second joint 5, the threads 31 and 51 formed on the outer periphery of the joint fitting portions 35 and 55 cover the outer tube 6. It becomes impossible to visually recognize from the outside, and breakage of the screw thread 31, 51 accompanying use can be effectively prevented.

上述した構成からなる本実施形態に係る打設用鋼管の継手構造1によれば、現場での溶接を必要とせず、必要な部品点数が少ないため、簡易な作業で施工することができ、部品の管理も容易になる。   According to the joint structure 1 of the steel pipe for placing according to the present embodiment having the above-described configuration, welding is not required at the site, and the number of necessary parts is small, so that construction can be performed by simple work. Management of

なお、本発明は上述した実施形態に限られず、種々の変形を行うことが可能である。   The present invention is not limited to the above-described embodiment, and various modifications can be made.

図10は、第1変形例に係る第1継手30と第2継手50を示す斜視図である。図11は、第1変形例に係る第1継手30と第2継手50が嵌合する様子を示す断面図である。   FIG. 10 is a perspective view showing a first joint 30 and a second joint 50 according to a first modification. FIG. 11 is a cross-sectional view showing how the first joint 30 and the second joint 50 according to the first modification are fitted.

第1変形例では、第1継手30は、基底部340と、基端部340を拡径して形成される拡径部330と、拡径部330を挟んで基端部340と反対側に位置する継手嵌合部350を備えている点、及び継手嵌合部350の外周にねじ山310が形成されている点で、上述した実施形態に係る第1継手3と共通している。   In the first modification, the first joint 30 is on the opposite side of the base portion 340, the enlarged diameter portion 330 formed by expanding the diameter of the base end portion 340, and the enlarged diameter portion 330. It is in common with the first joint 3 according to the above-described embodiment in that the joint fitting portion 350 is positioned, and the screw thread 310 is formed on the outer periphery of the joint fitting portion 350.

また、第2継手50は、基底部540と、基端部540を拡径して形成される拡径部530と、拡径部530を挟んで基端部540と反対側に位置する継手嵌合部550を備えている点、及び継手嵌合部550の外周にねじ山510が形成されている点で、上述した実施形態に係る第2継手5と共通している。   Further, the second joint 50 is a joint fitting that is located on the opposite side of the base end 540 with the base portion 540, the enlarged diameter portion 530 formed by expanding the diameter of the base end portion 540, and the enlarged diameter portion 530. It is in common with the second joint 5 according to the above-described embodiment in that the joint portion 550 is provided, and the screw thread 510 is formed on the outer periphery of the joint fitting portion 550.

そして、第1継手30と第2継手50が、回転方向における単一の位置で位置決めされて嵌合する点も上述した実施形態と共通している。   And the point by which the 1st joint 30 and the 2nd joint 50 are positioned and fitted in the single position in a rotation direction is also in common with the embodiment mentioned above.

また、第1継手30と第2継手50が回転方向における単一の位置で嵌合した状態において、ねじ山310、510が同一の螺旋上に位置した状態、すなわちねじ山310が描く螺旋の延長線上にねじ山510が位置した状態となる点も、上述した実施形態と共通している。   Further, in a state where the first joint 30 and the second joint 50 are engaged at a single position in the rotational direction, the screw threads 310, 510 are positioned on the same spiral, that is, an extension of the spiral drawn by the screw thread 310. The point where the screw thread 510 is positioned on the line is also common to the above-described embodiment.

しかし、第1変形例では、第1継手30の継手嵌合部350の凹凸部320の形状が上述した実施形態のものと異なっている。   However, in the first modification, the shape of the concavo-convex portion 320 of the joint fitting portion 350 of the first joint 30 is different from that of the embodiment described above.

具体的には、凹凸部320は、凸部321’及び凹部322’により形成されている。   Specifically, the concavo-convex portion 320 is formed of a convex portion 321 ′ and a concave portion 322 ′.

また、第2継手50の継手嵌合部550の凹凸部520の形状も、上述した実施形態のものと異なっている。具体的には、凹凸部520は、凸部521’及び凹部522’により形成されている。   Further, the shape of the uneven portion 520 of the joint fitting portion 550 of the second joint 50 is also different from that of the embodiment described above. Specifically, the uneven portion 520 is formed of a convex portion 521 'and a concave portion 522'.

第1継手30の凸部321’は、第2継手50の凹部522’と相補的な形状をしている。また、第2継手の凸部521’は、第1継手30の凹部322’と相補的な形状をしている。   The protrusion 321 ′ of the first joint 30 has a shape complementary to the recess 522 ′ of the second joint 50. Also, the convex portion 521 ′ of the second joint has a shape complementary to the concave portion 322 ′ of the first joint 30.

これらの点のみが、上述した実施形態と第1変形例との相違点である。   These points are the only differences between the above-described embodiment and the first modification.

そして、第1継手30の凸部321’が第2継手50の凹部522’と嵌合し、第1継手30の凹部322’が第2継手50の凸部521’と嵌合することで、第1鋼管及び第2鋼管の回転方向における単一の位置で位置決めがされた状態となる。   Then, the convex portion 321 ′ of the first joint 30 is engaged with the concave portion 522 ′ of the second joint 50, and the concave portion 322 ′ of the first joint 30 is engaged with the convex portion 521 ′ of the second joint 50. It will be in the state positioned by the single position in the rotation direction of the 1st steel pipe and the 2nd steel pipe.

また、上述した実施形態と同様に、回転方向において単一の位置に位置決めがされることで、ねじ山310、510が同一の螺旋上に位置するようになっている。   Also, as in the embodiment described above, the positioning at a single position in the rotational direction allows the threads 310, 510 to be positioned on the same spiral.

そして、回転方向における単一の位置に位置決めがされた状態で、上述した実施形態と同様にして外套管6が螺合され、打設方向及び引き抜き方向についても位置決めがなされた状態となり、継手構造が形成される。   Then, in the state of being positioned at a single position in the rotational direction, the outer tube 6 is screwed in the same manner as in the above-described embodiment, and the positioning in the placement direction and the removal direction is achieved. Is formed.

変形例1に係る継手構造によっても、上述した実施形態と同様に、現場での溶接を必要とせず、必要な部品点数が少ないため、簡易な作業で施工することができ、部品の管理も容易になる。   The joint structure according to the first modification does not require welding in the field, and the number of necessary parts is small as in the above-described embodiment, so that the construction can be performed by a simple operation and management of parts is easy. become.

図12は、第2変形例に係る第1継手70と第2継手80を示す斜視図である。図13は、第2変形例に係る第1継手70と第2継手80が嵌合する様子を示す断面図である。   FIG. 12 is a perspective view showing a first joint 70 and a second joint 80 according to a second modification. FIG. 13 is a cross-sectional view showing how the first joint 70 and the second joint 80 according to the second modification are fitted.

第2変形例においても、第1継手70は、基底部740と、基端部740を拡径して形成される拡径部730と、拡径部730を挟んで基端部740と反対側に位置する継手嵌合部750を備えている点、及び継手嵌合部750の外周にねじ山710が形成されている点で、上述した実施形態に係る第1継手3と共通している。   Also in the second modification, the first joint 70 is opposite to the base end portion 740 with the base portion 740, the enlarged diameter portion 730 formed by expanding the diameter of the base end portion 740, and the enlarged diameter portion 730. It has in common with the 1st joint 3 concerning an embodiment mentioned above in the point provided with joint fitting part 750 located, and the point where screw thread 710 is formed in the perimeter of joint fitting part 750.

また、第2継手80は、基底部840と、基端部840を拡径して形成される拡径部830と、拡径部830を挟んで基端部840と反対側に位置する継手嵌合部850を備えている点、及び継手嵌合部850の外周にねじ山810が形成されている点で、上述した実施形態に係る第2継手5と共通している。   Further, the second joint 80 is a joint fitting that is located on the opposite side of the base end 840 with the base 840, the enlarged diameter portion 830 formed by expanding the diameter of the proximal end 840, and the enlarged diameter portion 830. It is in common with the second joint 5 according to the above-described embodiment in that the joint portion 850 is provided and that the screw thread 810 is formed on the outer periphery of the joint fitting portion 850.

また、第1継手70と第2継手80が嵌合した状態において、ねじ山710、810が同一の螺旋上に位置した状態、すなわちねじ山710が描く螺旋の延長線上にねじ山810が位置した状態となる点も、上述した実施形態と共通している。   Further, in a state in which the first joint 70 and the second joint 80 are fitted, the screw thread 810 is positioned on the same spiral on which the screw threads 710 and 810 are positioned, that is, the screw thread 810 is positioned on the extension of the spiral drawn by the screw thread 710. The state of being in the state is also common to the above-described embodiment.

しかし、第2変形例では、上述した実施形態と比較し、継手嵌合部750、850の凹凸部700、800の形状が異なっている。この点のみが、上述した実施形態と第2変形例との相違点である。   However, in the second modification, as compared with the above-described embodiment, the shapes of the uneven portions 700 and 800 of the joint fitting portions 750 and 850 are different. Only this point is the difference between the above-described embodiment and the second modification.

具体的には、第1継手70には、同一幅の凸部721、722、723、724が第1の幅を備える凹部725、726、727により互いに間隔をあけて隣接して設けられるとともに、凸部720が第1の幅より広い第2の幅を備える凹部728、729により凸部721、724から間隔をあけて設けられている。   Specifically, in the first joint 70, the convex portions 721, 722, 723 and 724 having the same width are provided adjacent to each other at intervals by the concave portions 725, 726 and 727 having the first width, A protrusion 720 is spaced from the protrusions 721, 724 by recesses 728, 729 having a second width which is greater than the first width.

また、第2継手80には、同一幅の凸部825、826、827が第1の幅を備える凹部822、823により互いに間隔をあけて隣接して設けられている。更に、凸部828、829が、凹部820により間隔をあけて設けられている。凸部828は、凹部824により凸部827から間隔をあけて設けられ、凸部829は、凹部821により凸部825から間隔をあけて設けられている。   Further, in the second joint 80, convex portions 825, 826, 827 having the same width are provided adjacent to each other at intervals by the concave portions 822, 823 having the first width. In addition, projections 828, 829 are spaced apart by recesses 820. The convex portion 828 is spaced apart from the convex portion 827 by the concave portion 824, and the convex portion 829 is spaced apart from the convex portion 825 by the concave portion 821.

第1継手70の凸部721、722、723、724及び720は、それぞれ第2継手80の凹部821、822、823、824及び820と相補的な形状を有している。   The protrusions 721, 722, 723, 724 and 720 of the first joint 70 have shapes complementary to the recesses 821, 822, 823, 824 and 820 of the second joint 80, respectively.

また、第2継手80の凸部825、826、827、828及び829は、それぞれ第1継手の凹部725、726、727、728及び729とそれぞれ相補的な形状を有している。   Further, the convex portions 825, 826, 827, 828 and 829 of the second joint 80 respectively have shapes complementary to the concave portions 725, 726, 727, 728 and 729 of the first joint, respectively.

そして、第1継手70の凸部721、722、723、724及び720が、それぞれ第2継手80の凹部821、822、823、824及び820と嵌合する。   Then, the convex portions 721, 722, 723, 724 and 720 of the first joint 70 engage with the concave portions 821, 822, 823, 824 and 820 of the second joint 80, respectively.

また、第2継手80の凸部825、826、827、828及び829が、それぞれ第1継手70の凹部725、726、727、728及び729と嵌合する。   Also, the protrusions 825, 826, 827, 828 and 829 of the second joint 80 are fitted with the recesses 725, 726, 727, 728 and 729 of the first joint 70, respectively.

こうした嵌合により、第1鋼管2及び第2鋼管4の回転方向における単一の位置への位置決めがされた状態となり、ねじ山710、810が同一の螺旋上に位置することができる。   By such fitting, the first steel pipe 2 and the second steel pipe 4 can be positioned at a single position in the rotational direction, and the screw threads 710 and 810 can be positioned on the same spiral.

そして、こうした回転方向における位置決めがされた状態で外套管6が螺合され、打設方向及び引き抜き方向についても位置決めがなされた状態となり、継手構造が形成される。   Then, the outer tube 6 is screwed in such a state of positioning in the rotational direction, and also in the state of positioning in the placement direction and the removal direction, a joint structure is formed.

これにより、上述した実施形態と同様に、現場での溶接を必要とせず、必要な部品点数が少ないため、簡易な作業で施工することができ、部品の管理も容易になる。   As a result, as in the above-described embodiment, welding at the site is not required, and the number of necessary parts is small, so that construction can be performed with a simple operation, and management of parts is also easy.

図14は、第3変形例に係る第1継手300と第2継手500を示す斜視図である。図15は、第3変形例に係る第1継手300と第2継手500が嵌合する様子を示す断面図である。   FIG. 14 is a perspective view showing a first joint 300 and a second joint 500 according to a third modification. FIG. 15 is a cross-sectional view showing how the first joint 300 and the second joint 500 according to the third modification are fitted.

第3変形例においても、第1継手300は、基底部304と、基端部304を拡径して形成される拡径部303と、拡径部303を挟んで基端部304と反対側に位置する継手嵌合部305を備えている点、及び継手嵌合部305の外周にねじ山301が形成されている点で、上述した実施形態に係る第1継手3と共通している。   Also in the third modification, the first joint 300 is opposite to the base end 304 with the base portion 304, the enlarged diameter portion 303 formed by enlarging the diameter of the base end portion 304, and the enlarged diameter portion 303. It has in common with the 1st joint 3 concerning an embodiment mentioned above in the point provided with joint fitting part 305 located in, and the point in which screw thread 301 is formed in the perimeter of joint fitting part 305.

また、第2継手500は、基底部504と、基端部504を拡径して形成される拡径部503と、拡径部503を挟んで基端部504と反対側に位置する継手嵌合部505を備えている点、及び継手嵌合部505の外周にねじ山501が形成されている点で、上述した実施形態に係る第2継手5と共通している。   Further, the second joint 500 is a joint fitting that is located on the opposite side of the base end portion 504 with the base portion 504, the enlarged diameter portion 503 formed by expanding the diameter of the base end portion 504, and the enlarged diameter portion 503. It is in common with the second joint 5 according to the above-described embodiment in that the joint portion 505 is provided and the screw thread 501 is formed on the outer periphery of the joint fitting portion 505.

また、第1継手300と第2継手500が嵌合した状態において、ねじ山301、501が同一の螺旋上に位置した状態、すなわちねじ山301が描く螺旋の延長線上にねじ山501が位置した状態となる点も、上述した実施形態と共通している。   Further, in a state in which the first joint 300 and the second joint 500 are fitted, the screw threads 301, 501 are positioned on the same spiral, that is, the screw thread 501 is positioned on the extension of the spiral drawn by the screw thread 301. The state of being in the state is also common to the above-described embodiment.

しかし、第3変形例では、上述した実施形態と比較し、第1継手300と第2継手500の嵌合に設けられる凹凸が、継手の内周又は外周に形成され、第2継手500の先端部が第1継手300の内部に挿入されることで互いに回転方向に位置決めされる点で異なっている。   However, in the third modification, as compared with the above-described embodiment, the concavities and convexities provided on the fitting of the first joint 300 and the second joint 500 are formed on the inner periphery or the outer periphery of the joint, and the tip of the second joint 500 The parts are different in that they are positioned in the rotational direction with each other by being inserted into the inside of the first joint 300.

具体的には、第1継手300は、その内部空間Wに、第1継手300の長手方向に沿い、互いに同一形状を有する突条状の凸部302a、302b及び302cが形成されている。   Specifically, in the internal space W of the first joint 300, convex portions 302a, 302b and 302c having the same shape are formed along the longitudinal direction of the first joint 300.

凸部302a及び302b並びに凸部302b及び302cとは、それぞれ同一形状を有する凹部302d及び302eにより同一の間隔を空けて形成されている。   The convex portions 302a and 302b and the convex portions 302b and 302c are formed at equal intervals by concave portions 302d and 302e having the same shape, respectively.

また、凸部302aと凸部302cとは、凹部302d及び302eよりも広い間隔を有する凹部302fにより間隔を空けて形成されている。   Further, the convex portion 302a and the convex portion 302c are formed at intervals by concave portions 302f having a larger interval than the concave portions 302d and 302e.

一方、第2継手500は、継手嵌合部505の先端部において、継手嵌合部505の外径を狭めて形成される縮径部Nを有している。   On the other hand, the second joint 500 has a reduced diameter portion N formed by narrowing the outer diameter of the joint fitting portion 505 at the tip end portion of the joint fitting portion 505.

縮径部Nの外周には、同一形状を有する3つの凹部502a、502b及び502cが第2継手500の長手方向に沿って形成されている。そして、この3つの凹部502a、502b及び502cのそれぞれの間に、第2継手500の長手方向に沿う突条状の凸部502d、502e及び502fが形成されている。   Three recesses 502 a, 502 b and 502 c having the same shape are formed on the outer periphery of the reduced diameter portion N along the longitudinal direction of the second joint 500. Further, protruding portions 502d, 502e and 502f along the longitudinal direction of the second joint 500 are formed between the three recessed portions 502a, 502b and 502c, respectively.

凸部502fは、他の2つの凸部502d、502eと比較し幅の広い突条となっている。   The protrusion 502 f is a protrusion having a wider width than the other two protrusions 502 d and 502 e.

第1継手300の凸部302a、302b及び302cは、それぞれ第2継手500の凹部502a、502b及び502cと相補的な形状を有している。   The protrusions 302 a, 302 b and 302 c of the first joint 300 have shapes complementary to the recesses 502 a, 502 b and 502 c of the second joint 500, respectively.

また、第2継手500の凸部502d、502e及び502fは、それぞれ第1継手300の凹部302d、302e及び302fと相補的な形状を有している。   Further, the convex portions 502d, 502e and 502f of the second joint 500 have shapes complementary to the concave portions 302d, 302e and 302f of the first joint 300, respectively.

上述した第1継手300と第2継手500が嵌合する際には、第2継手500の縮径部Nが第1継手500の内部空間Wに挿入される。   When the first joint 300 and the second joint 500 described above are fitted, the reduced diameter portion N of the second joint 500 is inserted into the internal space W of the first joint 500.

そして、第1継手300の凸部302a、302b及び302cは、それぞれ第2継手500の凹部502a、502b及び502cに嵌合する。   Then, the convex portions 302a, 302b and 302c of the first joint 300 fit into the concave portions 502a, 502b and 502c of the second joint 500, respectively.

また、第2継手500の凸部502d、502e及び502fは、それぞれ第1継手300の凹部302d、302e及び302fと嵌合する。   Further, the protrusions 502d, 502e and 502f of the second joint 500 are fitted with the recesses 302d, 302e and 302f of the first joint 300, respectively.

こうした嵌合により、第1鋼管2及び第2鋼管4の回転方向における単一の位置に位置決めされた状態となり、ねじ山301、501が同一の螺旋上に位置することができる。   By such fitting, the first steel pipe 2 and the second steel pipe 4 can be positioned at a single position in the rotational direction, and the screw threads 301 and 501 can be positioned on the same spiral.

そして、こうした回転方向における単一の位置に位置決めがされた状態で外套管6が螺合され、打設方向及び引き抜き方向についても位置決めがなされた状態となり、継手構造が形成される。   Then, the outer tube 6 is screwed in a state of being positioned at a single position in such a rotational direction, and also in a state of being positioned also in the putting direction and the drawing direction, a joint structure is formed.

これにより、上述した実施形態及び他の変形例と同様に、現場での溶接を必要とせず、必要な部品点数が少ないため、簡易な作業で施工することができ、部品の管理も容易になる。   As a result, as in the embodiment and the other modifications described above, welding is not required at the site, and the number of necessary parts is small, so that construction can be performed with a simple operation and management of parts becomes easy. .

なお、上述した実施形態及び各変形例においては、第1継手及び第2継手の双方にねじ山が形成されていたが、本発明においてはこれに限らず、第1継手及び第2継手の双方にねじ溝が形成されている態様であってもよい。この場合には、外套管の内部には、これらのねじ溝と螺合するねじ山が設けられることになる。   In the above-described embodiment and each modification, threads are formed in both the first joint and the second joint, but the present invention is not limited thereto, and both the first joint and the second joint may be formed. The screw groove may be formed in the In this case, the inside of the outer tube is provided with screw threads screwed with these screw grooves.

また、第1継手と第2継手の継手嵌合部の形状は上述した実施形態及び各変形例に限られず、第1継手及び第2継手が嵌合した状態で互いに回転方向に、単一の位置に位置決めされる態様であれば、適宜形状を変更してもよい。   In addition, the shape of the joint fitting portion of the first joint and the second joint is not limited to the embodiment and each modification described above, and in the state in which the first joint and the second joint are fitted, a single rotation direction is achieved. The shape may be changed as appropriate as long as the position is positioned.

また、第1継手及び第2継手は必ずしも単一の方向でしか嵌合しない構造でなくともよく、第1継手と第2継手のネジ山同士が同一の螺旋上に位置する嵌合部分がわかるように、正しい嵌合箇所同士にマーキングする態様であってもよい。   In addition, the first joint and the second joint may not necessarily have a structure that can be fitted only in a single direction, and it is possible to find a fitting portion in which threads of the first joint and the second joint are positioned on the same spiral. As such, it may be a mode in which the correct fitting points are marked.

また、本発明に係る打設用鋼管の継手構造により接続された打設用鋼管を打設する際に、土中に障害物がある等した場合、打設用鋼管を逆回転させることがある。このとき、外套管が周囲の土の周面摩擦力により回転せずにその場に保持される一方、第1打設用鋼管と第2打設用鋼管のみが逆回転してしまう場合が考えられる。   In addition, when driving a steel pipe for casting connected by the joint structure of the steel pipe for casting according to the present invention, the steel pipe for casting may be reversely rotated if there is an obstacle or the like in the ground. . At this time, it is considered that the outer tube is held in place without rotating due to the circumferential surface friction force of the surrounding soil, while only the first and second casting steel tubes reversely rotate. Be

そのような場合の対策として、第1打設用鋼管と第2打設用鋼管を逆回転させた際に、一緒に外套管が回転するよう、第1打設用鋼管又は第2打設用鋼管と外套管とを、別途設けたビスや嵌合部材等により連結する態様としてもよい。   As a countermeasure in such a case, when the first casting steel pipe and the second casting steel pipe are reversely rotated, the first casting steel pipe or the second casting steel pipe is made to rotate together. It is good also as a mode which connects a steel pipe and a jacket pipe with a screw, fitting member, etc. which were provided separately.

1 打設用鋼管の継手構造
2 第1打設用鋼管
3、30、70、300 第1継手
4 第2打設用鋼管
5、50、80、500 第2継手
6 外套管
31、51、301、310、501、510、710、810 ねじ山
32、52、302、320、502、520、700、800 凹凸部
33、53、303、330、503、530、730、830 拡径部
34、54、304、340、504、540、740、840 基端部
35、55、305、350、505、550、750、850 継手嵌合部
62 ねじ溝
321、321’、322、323、521’ 凸部
322’、324、325、326、522’ 凹部
720、721、722、723、724 凸部
725、726、727、728、729 凹部
825、826、827、828、829 凸部
820、821、822、823、824 凹部
302a、302b、302c 凸部
302d、302e、302f 凹部
502d、502e、502f 凸部
502a、502b、502c 凹部
W 内部空間
N 縮径部
DESCRIPTION OF SYMBOLS 1 Joint structure 2 of a steel pipe for driving 1st steel pipe 3, 30, 70, 300 1st joint 4 1st joint 4 steel pipe 5 for 2nd installation 5, 50, 80, 500 2nd joint 6 outer pipe 31, 51, 301 310, 501, 510, 710, 810 Thread 32, 52, 302, 320, 502, 520, 700, 800 Irregularities 33, 53, 303, 330, 503, 530, 730, 830 Enlarged portions 34, 54 304, 340, 504, 540, 740, 840 Base end 35, 55, 305, 350, 505, 505, 550, 750, 850 Joint fitting portion 62 Threaded groove 321, 321 ', 322, 323, 521' Convex part 322 ', 324, 325, 326, 522' recess 720, 721, 722, 723, 724 protrusion 725, 726, 727, 728, 729 recess 825, 826, 827, 82 , 829 convex portions 820,821,822,823,824 recesses 302a, 302b, 302c projecting portion 302d, 302 e, 302f recess 502d, 502 e, 502f protruding portions 502a, 502b, 502c recess W inner space N reduced diameter portion

Claims (5)

第1打設用鋼管の端部に取り付けられた第1継手と、第2打設用鋼管の端部に取り付けられた第2継手とが連結されて、打設用鋼管同士が連結される打設用鋼管の継手構造であって、
前記第1継手は端部に第1継手嵌合部を有し、前記第2継手は端部に前記第1継手嵌合部に嵌合する第2継手嵌合部を有し、
前記第1継手及び前記第2継手の外周には、双方ともにねじ溝若しくは双方ともにねじ山が設けられ、
前記第1継手の前記第1継手嵌合部と前記第2継手の前記第2継手嵌合部が嵌合した状態において、前記双方のねじ溝又は前記双方のねじ山は同一の螺旋上に位置し、
嵌合させた前記第1継手及び前記第2継手の外周にまたがる態様で、前記第1継手及び前記第2継手の双方の前記ねじ溝若しくは前記ねじ山に外套管が螺合されて前記第1打設用鋼管及び前記第2打設用鋼管が連結され、
前記第1継手の前記第1継手嵌合部は、端部が切り欠かれて形成される第1凹凸部であり、
前記第2継手の前記第2継手嵌合部は、端部が切り欠かれて形成されて前記第1凹凸部と相補的な形状な第2凹凸部である
ことを特徴とする打設用鋼管の継手構造。
The first joint attached to the end of the first driving steel pipe and the second joint attached to the end of the second driving steel pipe are connected to each other, and the driving steel pipes are connected to each other Joint structure of steel pipe for installation,
The first joint has a first joint fitting portion at an end portion, and the second joint has a second joint fitting portion at an end portion fitted to the first joint fitting portion,
Both the outer surface of the first joint and the outer surface of the second joint are provided with screw grooves or both with a screw thread,
In a state in which the first joint fitting portion of the first joint and the second joint fitting portion of the second joint are engaged, the both screw grooves or the both screw threads are positioned on the same spiral. And
An outer tube is screwed with the screw groove or the screw thread of both the first joint and the second joint so as to extend across the outer periphery of the first joint and the second joint which are fitted. The casting steel pipe and the second casting steel pipe are connected,
The first joint fitting portion of the first joint is a first uneven portion formed by cutting out an end portion,
The second joint fitting portion of the second joint is a second uneven portion formed by cutting out an end portion and having a shape complementary to the first uneven portion. Joint structure.
前記第1継手の前記第1継手嵌合部と前記第2継手の前記第2継手嵌合部が嵌合した状態において、前記双方のねじ溝又は前記双方のねじ山は同一の螺旋上に位置し、かつ、前記第1打設用鋼管と前記第2打設用鋼管とは回転方向に単一の位置で位置決めされる
ことを特徴とする請求項1記載の打設用鋼管の継手構造。
In a state in which the first joint fitting portion of the first joint and the second joint fitting portion of the second joint are engaged, the both screw grooves or the both screw threads are positioned on the same spiral. The joint structure of a steel pipe for driving according to claim 1, wherein the first steel pipe for driving and the second steel pipe for driving are positioned at a single position in a rotational direction.
前記第1凹凸部は、複数の第1凹部を有し、一の前記第1凹部の開口径が他の前記第1凹部の開口径よりも小さく、
前記第2凹凸部は、複数の第2凸部を有し、一の前記第2凸部の幅が他の前記第2凸部の幅よりも小さい
ことを特徴とする請求項2記載の打設用鋼管の継手構造。
The first uneven portion has a plurality of first concave portions, and the opening diameter of one of the first concave portions is smaller than the opening diameter of the other first concave portions,
The hammer according to claim 2, wherein the second concavo-convex portion has a plurality of second convex portions, and the width of one of the second convex portions is smaller than the width of the other second convex portions. Joint structure of steel pipe for installation.
第1凹凸部を端部に有し、外周にねじ溝若しくはねじ山が形成された第1継手が端部に取り付けられた第1打設用鋼管と、
前記第1凹凸部と相補的な形状である第2凹凸部を端部に有し、外周にねじ溝若しくはねじ山が形成された第2継手が端部に取り付けられた第2打設用鋼管と、
を連結する打設用鋼管の接続方法であって、
前記第1継手の端部が切り欠かれて形成された前記第1凹凸部と前記第2継手の端部が切り欠かれて形成された前記第2凹凸部とを嵌合し位置決めする工程と、
前記前記第1凹凸部と前記第2凹凸部とが嵌合した状態で、前記第1継手と前記第2継手の外周にまたがる態様で、前記第1継手及び前記第2継手の双方の前記ねじ溝若しくは前記ねじ山に外套管を螺合し打設方向及び引き抜き方向に位置決めする工程と、を備える
ことを特徴とする打設用鋼管の接続方法。
A first casting steel pipe having a first joint having a first uneven portion at an end and a screw groove or a thread formed on an outer periphery attached to the end;
A second casting steel pipe having a second uneven portion having a shape complementary to the first uneven portion at an end portion, and a second joint having a screw groove or a thread formed on an outer periphery attached to the end portion When,
Connecting method of steel pipe for driving to connect
Fitting and positioning the first uneven portion formed by cutting out the end of the first joint and the second uneven portion formed by cutting out the end of the second joint; ,
The screw of both the first joint and the second joint is in a mode of straddling the outer periphery of the first joint and the second joint in a state where the first uneven portion and the second uneven portion are fitted. Screwing the outer tube into the groove or the screw thread and positioning the outer tube in the casting direction and in the drawing direction.
前記第1凹凸部と前記第2凹凸部とは回転方向における単一の位置で位置決めされる
ことを特徴とする請求項4記載の打設用鋼管の接続方法。
The method according to claim 4, wherein the first uneven portion and the second uneven portion are positioned at a single position in a rotational direction.
JP2018166214A 2018-09-05 2018-09-05 Joint structure of steel pipe for installation, and connection method of steel pipe for installation Pending JP2019049187A (en)

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