JP2021080792A - Screw joint for steel pipe pile - Google Patents

Screw joint for steel pipe pile Download PDF

Info

Publication number
JP2021080792A
JP2021080792A JP2019210994A JP2019210994A JP2021080792A JP 2021080792 A JP2021080792 A JP 2021080792A JP 2019210994 A JP2019210994 A JP 2019210994A JP 2019210994 A JP2019210994 A JP 2019210994A JP 2021080792 A JP2021080792 A JP 2021080792A
Authority
JP
Japan
Prior art keywords
female
male
threaded
threaded portion
steel pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2019210994A
Other languages
Japanese (ja)
Other versions
JP6733978B1 (en
Inventor
洋三 關口
Yozo Sekiguchi
洋三 關口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chb Co Ltd
Original Assignee
Chb Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chb Co Ltd filed Critical Chb Co Ltd
Priority to JP2019210994A priority Critical patent/JP6733978B1/en
Application granted granted Critical
Publication of JP6733978B1 publication Critical patent/JP6733978B1/en
Publication of JP2021080792A publication Critical patent/JP2021080792A/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Piles And Underground Anchors (AREA)

Abstract

To provide a screw joint for a steel pipe pile which is not loosened even when force of reverse rotation is applied thereto.SOLUTION: The screw joint for a steel pipe pile includes a female member having a female screw part, a male member having a male screw part screwed to the female screw part, and a connection member for connecting the female member and the male member rotationally fit by the female screw part and the male screw part. The female member further has a female side connection screw part which has a rotation direction for tightening different from that of the female screw part. The male member further has a male side connection screw part which forms a continuous screw part successively to the female side connection screw part in a state of being rotationally fit to the female member by the female screw part and the male screw part, and has a rotation direction for tightening different from that of the male screw part. The connection member has a connection screw part which is screwed to the continuous screw part and connects the female side connection screw part and the male side connection screw part.SELECTED DRAWING: Figure 1

Description

本発明は、鋼管杭用ねじ継手に関する。 The present invention relates to threaded joints for steel pipe piles.

鋼管杭の継手としてねじ継手が知られている。例えば、下記の特許文献1には、鋼管端部にそれぞれ取り付けられ、雄ねじ部を有する雄継手部と、雌ねじ部を有する雌継手部と、雄継手部に螺合するリングねじを有し、雄継手部と雌継手部の間にリングねじを介在させて、雄継手部と雌継手部を所定の嵌合位置になるまで回転嵌合させて、リングねじを雌継手部側に向けて締めつけて締結完了できるようにした機械式継手について提案されている。 Threaded joints are known as joints for steel pipe piles. For example, Patent Document 1 below has a male joint portion that is attached to a steel pipe end portion and has a male joint portion, a female joint portion that has a female screw portion, and a ring screw that is screwed into the male joint portion. A ring screw is interposed between the joint and the female joint, and the male joint and the female joint are rotationally fitted until they reach a predetermined fitting position, and the ring screw is tightened toward the female joint. Proposed mechanical joints that allow the fastening to be completed.

この特許文献1に開示されている機械式継手では、締結完了の際に、外リングを強く締め付けることで鋼管杭を、雄継手部と雌継手部とを嵌合させる回転(正回転)とは逆の回転(逆回転)をさせた場合でも外れにくくすることができる。 In the mechanical joint disclosed in Patent Document 1, when the fastening is completed, the rotation (forward rotation) of fitting the steel pipe pile to the male joint portion and the female joint portion by strongly tightening the outer ring is It can be made difficult to come off even when the reverse rotation (reverse rotation) is performed.

特開2018−111973号公報JP-A-2018-111973

しかしながら、従来の鋼管杭用ねじ継手は、強い力で鋼管杭を逆回転させた場合に外れる可能性があった。例えば、特許文献1に開示されている継手の場合、リングねじの締め付けによるねじの摩擦力のみによって逆回転に耐える構造である為、それ以上の力で逆回転が行われるとねじが緩んで外れてしまうという問題がある。例えば、回転貫入鋼管杭用の継手とした場合、正回転と同様の強い力で回転貫入鋼管杭を逆回転させた場合に継手部分が緩んで外れてしまうという問題点があった。 However, the conventional threaded joint for steel pipe piles may come off when the steel pipe piles are rotated in the reverse direction with a strong force. For example, the joint disclosed in Patent Document 1 has a structure that can withstand reverse rotation only by the frictional force of the screw due to tightening of the ring screw. Therefore, if reverse rotation is performed with a force higher than that, the screw loosens and comes off. There is a problem that it ends up. For example, in the case of a joint for a rotary penetration steel pipe pile, there is a problem that the joint portion loosens and comes off when the rotary penetration steel pipe pile is rotated in the reverse direction with a strong force similar to that of forward rotation.

したがって、本発明の目的の一つは、逆回転の力が加わっても緩まない鋼管杭用ねじ継手を提供することにある。 Therefore, one of the objects of the present invention is to provide a threaded joint for steel pipe piles that does not loosen even when a force of reverse rotation is applied.

本発明は、
雌ねじ部を有する雌部材と、
前記雌ねじ部と螺合する雄ねじ部を有する雄部材と、
前記雌ねじ部及び前記雄ねじ部により回転嵌合された前記雌部材及び前記雄部材間を連接する連接部材とを備え、
前記雌部材は、前記雌ねじ部とは締め付けの回転方向が異なる雌側連結ねじ部をさらに有し、
前記雄部材は、前記雌ねじ部及び前記雄ねじ部により前記雌部材と回転嵌合させた状態において前記雌側連結ねじ部と連続して連続ねじ部を形成する、前記雄ねじ部とは締め付けの回転方向が異なる雄側連結ねじ部をさらに有し、
前記連接部材は、前記連続ねじ部と螺合し、前記雌側連結ねじ部及び前記雄側連結ねじ部間を連接する連接ねじ部を有する
鋼管杭用ねじ継手である。
The present invention
A female member with a female thread and
A male member having a male threaded portion to be screwed with the female threaded portion,
The female member and the connecting member for connecting between the female member and the male member, which are rotationally fitted by the female screw portion and the male screw portion, are provided.
The female member further has a female-side connecting screw portion whose tightening rotation direction is different from that of the female screw portion.
The male member forms a continuous threaded portion continuously with the female side connecting threaded portion in a state where the male member is rotationally fitted to the female member by the female threaded portion and the male threaded portion. Further has different male side connecting threads,
The connecting member is a threaded joint for a steel pipe pile having a connecting threaded portion that is screwed with the continuous threaded portion and is connected between the female side connecting threaded portion and the male side connecting threaded portion.

また、本発明は、
雌ねじ部を有する雌部材と、
前記雌ねじ部と螺合する雄ねじ部を有する雄部材と、
前記雌ねじ部及び前記雄ねじ部により回転嵌合された前記雌部材及び前記雄部材間を連接する連接部材とを備え、
前記雌部材は、雌側連結ねじ部をさらに有し、
前記雄部材は、前記雌ねじ部及び前記雄ねじ部により前記雌部材と回転嵌合させた状態において前記雌側連結ねじ部と連続して連続ねじ部を形成する雄側連結ねじ部をさらに有し、
前記連接部材は、前記連続ねじ部と螺合し、前記雌側連結ねじ部及び前記雄側連結ねじ部間を連接する連接ねじ部を有し、
前記雌ねじ部及び前記雄ねじ部が右ねじの螺合構造を有し、前記連続ねじ部及び前記連接ねじ部が左ねじの螺合構造を有する、又は、前記雌ねじ部及び前記雄ねじ部が左ねじの螺合構造を有し、前記連続ねじ部及び前記連接ねじ部が右ねじの螺合構造を有する
鋼管杭用ねじ継手である。
In addition, the present invention
A female member with a female thread and
A male member having a male threaded portion to be screwed with the female threaded portion,
The female member and the connecting member for connecting between the female member and the male member, which are rotationally fitted by the female screw portion and the male screw portion, are provided.
The female member further has a female side connecting screw portion.
The male member further has a male-side connecting threaded portion that forms a continuous threaded portion continuously with the female-side connecting threaded portion in a state of being rotationally fitted to the female member by the female-threaded portion and the male-threaded portion.
The connecting member has a connecting threaded portion that is screwed with the continuous threaded portion and is connected between the female side connecting threaded portion and the male side connecting threaded portion.
The female threaded portion and the male threaded portion have a right-handed threaded structure, the continuous threaded portion and the articulated threaded portion have a left-handed threaded threaded structure, or the female-threaded portion and the male-threaded portion have a left-handed threaded structure. It is a threaded joint for steel pipe piles that has a threaded structure and the continuous threaded portion and the articulated threaded portion have a right-handed threaded structure.

本発明によれば、逆回転の力が加わっても緩まない鋼管杭用ねじ継手を提供することができる。なお、本明細書において例示された効果により本発明の内容が限定して解釈されるものではない。 According to the present invention, it is possible to provide a threaded joint for a steel pipe pile that does not loosen even when a force of reverse rotation is applied. It should be noted that the contents of the present invention are not limitedly interpreted by the effects exemplified in the present specification.

一実施形態に係る鋼管杭用ねじ継手の構成例を示す分解斜視図である。It is an exploded perspective view which shows the structural example of the thread joint for a steel pipe pile which concerns on one Embodiment. 接合状態における鋼管杭用ねじ継手の構成例を示す斜視図である。It is a perspective view which shows the structural example of the thread joint for a steel pipe pile in a joined state. 接合状態における鋼管杭用ねじ継手の構成例を示す切断部端面図である。It is a cut portion end view which shows the structural example of the thread joint for a steel pipe pile in a joined state. 鋼管杭用ねじ継手の接合手順の一例を説明するための図である。It is a figure for demonstrating an example of the joining procedure of the thread joint for a steel pipe pile. 鋼管杭用ねじ継手の接合手順の一例を説明するための図である。It is a figure for demonstrating an example of the joining procedure of the thread joint for a steel pipe pile. 鋼管杭用ねじ継手の接合手順の一例を説明するための図である。It is a figure for demonstrating an example of the joining procedure of the thread joint for a steel pipe pile. 鋼管杭用ねじ継手の接合手順の一例を説明するための図である。It is a figure for demonstrating an example of the joining procedure of the thread joint for a steel pipe pile. 鋼管杭用ねじ継手の使用態様の一例について説明する為の図である。It is a figure for demonstrating an example of the use mode of the thread joint for a steel pipe pile.

以下、本発明の実施形態について図面を参照しながら説明する。説明は、以下の順序で行う。
<1.一実施形態>
<2.変形例>
但し、以下に示す実施形態等は、本発明の技術思想を具体化するための構成を例示するものであって、本発明は例示された構成に限定されるものではない。なお、特許請求の範囲に示される部材を、実施形態の部材に特定するものではない。特に、実施形態に記載されている構成部材の寸法、材質、形状、その相対的配置、上下左右等の方向の記載等は特に限定する旨の記載がない限りは、本発明の範囲をそれのみに限定する趣旨ではなく、単なる説明例にすぎない。なお、各図面が示す部材の大きさや位置関係等は、説明を明確にするため誇張していることがあり、また、図示が煩雑となることを防止するために、参照符号の一部のみを図示する場合もある。さらに以下の説明において、同一の名称、符号については同一もしくは同質の部材を示しており、重複する説明を適宜省略する。さらに、本発明を構成する各要素は、複数の要素を同一の部材で構成して一つの部材で複数の要素を兼用する態様としてもよいし、逆に一つの部材の機能を複数の部材で分担して実現することもできる。
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The explanation will be given in the following order.
<1. One Embodiment>
<2. Modification example>
However, the embodiments and the like shown below exemplify a configuration for embodying the technical idea of the present invention, and the present invention is not limited to the illustrated configuration. The members shown in the claims are not specified as the members of the embodiment. In particular, unless otherwise specified, the dimensions, materials, shapes, relative arrangements thereof, directions such as up / down / left / right, etc. of the constituent members described in the embodiments are limited to the scope of the present invention. It is not intended to be limited to, but merely an example of explanation. The size and positional relationship of the members shown in each drawing may be exaggerated to clarify the explanation, and only a part of the reference reference numerals is used to prevent the illustration from becoming complicated. It may be illustrated. Further, in the following description, members having the same or the same quality are shown with the same name and reference numeral, and duplicate description will be omitted as appropriate. Further, each element constituting the present invention may be configured such that a plurality of elements are composed of the same member and the plurality of elements are shared by one member, or conversely, the function of one member is performed by the plurality of members. It can also be shared and realized.

<1.一実施形態>
「鋼管杭用ねじ継手の概略構造」
図1は、本発明の一実施形態に係る鋼管杭用ねじ継手の構成例を示す分解斜視図である。図2は、接合状態における鋼管杭用ねじ継手の構成例を示す斜視図である。図3は、接合状態における鋼管杭用ねじ継手の構成例を示す切断部端面図である。
<1. One Embodiment>
"Outline structure of threaded joints for steel pipe piles"
FIG. 1 is an exploded perspective view showing a configuration example of a threaded joint for steel pipe piles according to an embodiment of the present invention. FIG. 2 is a perspective view showing a configuration example of a threaded joint for steel pipe piles in a joined state. FIG. 3 is an end view of a cut portion showing a configuration example of a threaded joint for steel pipe piles in a joined state.

図1に示すように、本実施形態に係る鋼管杭用ねじ継手1は、具体的には、回転貫入鋼管杭の継手であり、雌部材2と雄部材3と連接部材4とを有している。雌部材2は、雌ねじ部21を有し、雄部材3は、雌ねじ部21と螺合する雄ねじ部31を有している。図3に示すように、連接部材4は、雌ねじ部21及び雄ねじ部31により回転嵌合された雌部材2及び雄部材3間を連接する。 As shown in FIG. 1, the threaded joint 1 for a steel pipe pile according to the present embodiment is specifically a joint of a rotary penetration steel pipe pile, and has a female member 2, a male member 3, and an connecting member 4. There is. The female member 2 has a female screw portion 21, and the male member 3 has a male screw portion 31 that is screwed with the female screw portion 21. As shown in FIG. 3, the connecting member 4 connects between the female member 2 and the male member 3 which are rotationally fitted by the female screw portion 21 and the male screw portion 31.

図1に示すように、雌部材2は、雌ねじ部21とは締め付けの回転方向が異なる雌側連結ねじ部22をさらに有している。雄部材3は、雌ねじ部21及び雄ねじ部31により雌部材2と回転嵌合させた状態において雌側連結ねじ部22と連続して連続ねじ部5を形成する、雄ねじ部31とは締め付けの回転方向が異なる雄側連結ねじ部32をさらに有している。連接部材4は、連続ねじ部5と螺合し、雌側連結ねじ部22及び雄側連結ねじ部32間を連接する連接ねじ部41を有している。 As shown in FIG. 1, the female member 2 further has a female side connecting screw portion 22 whose tightening rotation direction is different from that of the female screw portion 21. The male member 3 forms a continuous threaded portion 5 continuously with the female side connecting threaded portion 22 in a state where the male member 3 is rotationally fitted to the female member 2 by the female threaded portion 21 and the male threaded portion 31, and is tightened with the male threaded portion 31. Further, it has a male side connecting screw portion 32 having a different direction. The connecting member 4 has a connecting screw portion 41 that is screwed with the continuous screw portion 5 and connects between the female side connecting screw portion 22 and the male side connecting screw portion 32.

以下、この鋼管杭用ねじ継手1を構成する雌部材2、雄部材3及び連接部材4について詳述する。 Hereinafter, the female member 2, the male member 3, and the connecting member 4 constituting the threaded joint 1 for steel pipe piles will be described in detail.

「雌部材」
雌部材2は、図1に示すように、管状に構成され、一方の開口側に接合部23を有している。接合部23は、接合する一方の鋼管杭(図示略)の端部と接合される。例えば、接合部23は、溶接によって鋼管杭と接合される。雌部材2は、具体的には、接合部23における外径及び内径が、接合される鋼管杭と同径となっている。雌部材2の他方の開口側には、前述した雌ねじ部21及び雌側連結ねじ部22が形成されている。
"Female member"
As shown in FIG. 1, the female member 2 is formed in a tubular shape and has a joint portion 23 on one opening side. The joint portion 23 is joined to the end portion of one of the steel pipe piles (not shown) to be joined. For example, the joint portion 23 is joined to the steel pipe pile by welding. Specifically, the female member 2 has the same outer diameter and inner diameter at the joint portion 23 as the steel pipe pile to be joined. The female screw portion 21 and the female side connecting screw portion 22 described above are formed on the other opening side of the female member 2.

雌ねじ部21は、後述する雄部材3の雄ねじ部31と螺合する。具体的には、雌ねじ部21は、図1に示すように、雌部材2の他方の開口側の内面に右ねじ状の凹凸を形成することで設けられる。より具体的には、雌ねじ部21は、図3に示すように、ねじ山の断面が方形(ねじ溝も同様)の角ねじによって構成される。角ねじ構造とすることで、断面が台形や三角等の他のねじ構造とした場合と比較して接合強度、例えば、接合後の鋼管杭の曲げ強度を高めることができる。雌ねじ部21を形成する為の各要素、例えば、雌ねじ部21の凹凸形状(ねじ山及びねじ溝)を決める各寸法、条数、ピッチ等は、接合強度や耐久性等の所定の条件に応じて適宜選定される。 The female screw portion 21 is screwed with the male screw portion 31 of the male member 3 described later. Specifically, as shown in FIG. 1, the female thread portion 21 is provided by forming a right-hand thread-like unevenness on the inner surface of the female member 2 on the other opening side. More specifically, as shown in FIG. 3, the female thread portion 21 is composed of a square screw having a square thread cross section (similarly for a thread groove). By adopting a square screw structure, it is possible to increase the joint strength, for example, the bending strength of the steel pipe pile after joining, as compared with the case where the cross section is trapezoidal or triangular. Each element for forming the female thread portion 21, for example, each dimension, number of threads, pitch, etc. that determines the uneven shape (thread and thread groove) of the female thread portion 21 depends on predetermined conditions such as joint strength and durability. Will be selected as appropriate.

雌側連結ねじ部22は、連接部材4の連接ねじ部41と螺合する。具体的には、雌側連結ねじ部22は、図1に示すように、雌部材2の他方の開口側の外面に左ねじ状の凹凸を形成することで設けられる。より具体的には、雌側連結ねじ部22は、図3に示すように、雌ねじ部21と同様、角ねじによって構成される。雌側連結ねじ部22を形成する為の各要素は、雌ねじ部21と同様、所定の条件に応じて適宜選定される。 The female side connecting screw portion 22 is screwed with the connecting screw portion 41 of the connecting member 4. Specifically, as shown in FIG. 1, the female side connecting screw portion 22 is provided by forming a left-hand thread-shaped unevenness on the outer surface of the female member 2 on the other opening side. More specifically, as shown in FIG. 3, the female side connecting screw portion 22 is composed of square screws like the female screw portion 21. Like the female screw portion 21, each element for forming the female side connecting screw portion 22 is appropriately selected according to a predetermined condition.

図1から図3の各図に示すように、例えば、雌側連結ねじ部22の外径は、接合部23の外径よりも小さい構成を有しており、雌部材2の雌側連結ねじ部22及び接合部23間には、雌側鍔部24が形成されている。雌側鍔部24は、雌側連結ねじ部22への連接ねじ部41のねじ込みの回転を規制する。具体的には、連接部材4は、接合部23側の開口端部が雌側鍔部24に当接することで回転が規制される。例えば、雌部材2は、雌側連結ねじ部22及び雌側鍔部24により、連接部材4の内面の全てをねじ込める構造とすることが好ましい。これにより、例えば、後述する接合作業を行い易くすることができる。なお、この雌部材2における連接部材4の回転を規制する構造は、雌側鍔部24によるものに限らない。例えば、雌側連結ねじ部22のねじ形状等により規制する構造であってもよい。 As shown in each of FIGS. 1 to 3, for example, the outer diameter of the female side connecting screw portion 22 has a configuration smaller than the outer diameter of the joint portion 23, and the female side connecting screw of the female member 2 has a structure smaller than that of the joint portion 23. A female side flange portion 24 is formed between the portion 22 and the joint portion 23. The female side flange portion 24 regulates the rotation of screwing of the connecting screw portion 41 into the female side connecting screw portion 22. Specifically, the rotation of the connecting member 4 is restricted by the opening end portion on the joint portion 23 side coming into contact with the female side flange portion 24. For example, it is preferable that the female member 2 has a structure in which the entire inner surface of the connecting member 4 can be screwed by the female side connecting screw portion 22 and the female side flange portion 24. Thereby, for example, it is possible to facilitate the joining work described later. The structure that regulates the rotation of the connecting member 4 in the female member 2 is not limited to that of the female side flange portion 24. For example, the structure may be regulated by the screw shape of the female side connecting screw portion 22 or the like.

「雄部材」
雄部材3は、図1に示すように、管状に構成され、一方の開口側に接合部33を有している。接合部33は、接合する他方の鋼管杭(図示略)の端部と接合される。例えば、接合部33は、溶接によって鋼管杭と接合される。雄部材3は、具体的には、接合部33における外径及び内径が、接合される鋼管杭と同径となっている。雄部材3の他方の開口側には、前述した雄ねじ部31及び雄側連結ねじ部32が形成されている。
"Male member"
As shown in FIG. 1, the male member 3 is formed in a tubular shape and has a joint portion 33 on one opening side. The joint portion 33 is joined to the end portion of the other steel pipe pile (not shown) to be joined. For example, the joint portion 33 is joined to the steel pipe pile by welding. Specifically, the male member 3 has the same outer diameter and inner diameter at the joint portion 33 as the steel pipe pile to be joined. The male screw portion 31 and the male side connecting screw portion 32 described above are formed on the other opening side of the male member 3.

雄ねじ部31は、前述した雌部材2の雌ねじ部21と螺合する。具体的には、雄ねじ部31は、図1に示すように、雄部材3の他方の開口側の外面に右ねじ状の凹凸を形成することで設けられる。より具体的には、雄ねじ部31は、図3に示すように、雌ねじ部21と同様、角ねじによって構成される。雄ねじ部31を形成する為の各要素は、雌ねじ部21と同様、所定の条件に応じて適宜選定される。 The male screw portion 31 is screwed with the female screw portion 21 of the female member 2 described above. Specifically, as shown in FIG. 1, the male screw portion 31 is provided by forming a right-hand thread-shaped unevenness on the outer surface of the male member 3 on the other opening side. More specifically, as shown in FIG. 3, the male screw portion 31 is composed of a square screw like the female screw portion 21. Like the female threaded portion 21, each element for forming the male threaded portion 31 is appropriately selected according to a predetermined condition.

雄側連結ねじ部32は、連接部材4の連接ねじ部41と螺合する。具体的には、雄側連結ねじ部32は、図1に示すように、雄部材3の他方の開口側における雄ねじ部31よりも接合部33側の外面に左ねじ状の凹凸を形成することで設けられる。なお、雄側連結ねじ部32を形成する為の各要素は、前述した雌側連結ねじ部22と同じとされる。 The male side connecting screw portion 32 is screwed with the connecting screw portion 41 of the connecting member 4. Specifically, as shown in FIG. 1, the male side connecting screw portion 32 forms a left-handed screw-like unevenness on the outer surface on the joint portion 33 side of the male screw portion 31 on the other opening side of the male member 3. It is provided in. Each element for forming the male side connecting screw portion 32 is the same as the female side connecting screw portion 22 described above.

図1及び図3に示すように、例えば、前述した雄ねじ部31の外径は、雄側連結ねじ部32の外径よりも小さい構成を有しており、雄部材3の雄ねじ部31及び雄側連結ねじ部32間には、段差部34が形成されている。段差部34は、雌ねじ部21への雄ねじ部31のねじ込みの回転を規制する。具体的には、雄部材3は、接合部33側の雌部材2の開口端部が段差部34に当接することで回転が規制される。例えば、雄部材3は、雄側連結ねじ部32及び段差部34により、連接部材4と同じ分だけ雌部材2にねじ込める構造とすることが好ましい。これにより、接合状態での雌部材2側と雄部材3側の強度や耐久性等を均等にすることができる。なお、この雌部材2に対する雄部材3の回転を規制する構造は、段差部34によるものに限らない。例えば、雄ねじ部31のねじ形状等により規制する構造であってもよい。 As shown in FIGS. 1 and 3, for example, the outer diameter of the male screw portion 31 described above has a configuration smaller than the outer diameter of the male side connecting screw portion 32, and the male screw portion 31 and the male of the male member 3 have a structure. A step portion 34 is formed between the side connecting screw portions 32. The step portion 34 regulates the rotation of screwing the male screw portion 31 into the female screw portion 21. Specifically, the rotation of the male member 3 is restricted by the opening end of the female member 2 on the joint portion 33 side coming into contact with the step portion 34. For example, it is preferable that the male member 3 has a structure in which the male member 3 is screwed into the female member 2 by the same amount as the connecting member 4 by the male side connecting screw portion 32 and the step portion 34. As a result, the strength and durability of the female member 2 side and the male member 3 side in the joined state can be made equal. The structure that regulates the rotation of the male member 3 with respect to the female member 2 is not limited to the step portion 34. For example, the structure may be regulated by the screw shape of the male screw portion 31 or the like.

図3に示すように、雌側連結ねじ部22及び雄側連結ねじ部32は、雌ねじ部21と雄ねじ部31とが螺合して雌部材2と雄部材3とが回転嵌合された状態(具体的には、段差部34により雌部材2に対する雄部材3のねじ込みの回転が規制された状態)において連続する連続ねじ部5を形成する。この連続ねじ部5を形成する雌側連結ねじ部22及び雄側連結ねじ部32間の連続構造は、雌側連結ねじ部22及び雄側連結ねじ部32に連接ねじ部41を螺合させた連接部材4を回転可能なものであればよく、例えば、雌側連結ねじ部22及び雄側連結ねじ部32間に逃げ溝を有していてもよい。 As shown in FIG. 3, the female-side connecting screw portion 22 and the male-side connecting screw portion 32 are in a state in which the female-side threaded portion 21 and the male-threaded portion 31 are screwed together and the female member 2 and the male member 3 are rotationally fitted. (Specifically, a continuous threaded portion 5 is formed in a state in which the screwing rotation of the male member 3 with respect to the female member 2 is restricted by the stepped portion 34). In the continuous structure between the female side connecting screw portion 22 and the male side connecting screw portion 32 forming the continuous screw portion 5, the connecting screw portion 41 is screwed into the female side connecting screw portion 22 and the male side connecting screw portion 32. The connecting member 4 may be rotatable, and may have a relief groove between the female side connecting screw portion 22 and the male side connecting screw portion 32, for example.

図1及び図3に示すように、例えば、前述した雄側連結ねじ部32の外径は、接合部33の外径よりも小さい構成を有しており、雄部材3の雄側連結ねじ部32及び接合部33間には、雄側鍔部35(本実施形態に係る回転規制部)が形成されている。雄側鍔部35は、雄側連結ねじ部32への連接ねじ部41のねじ込みの回転を規制する。具体的には、連接部材4は、接合部33側の開口端部が雄側鍔部35に当接することで回転が規制される。例えば、雄部材3は、雄側連結ねじ部32及び雄側鍔部35により、連接部材4の内面の半分をねじ込める構造とすることが好ましい。これにより、連接部材4の回転軸方向における中心が雌側連結ねじ部22及び雄側連結ねじ部32の継目部に位置する位置で連接部材4の回転を規制することができ、接合状態での強度や耐久性等を高めることができる。なお、この雄部材3における連接部材4の回転を規制する回転規制部の構造は、雄側鍔部35によるものに限らない。例えば、雄側連結ねじ部32のねじ形状等により規制する構造であってもよい。 As shown in FIGS. 1 and 3, for example, the outer diameter of the male-side connecting screw portion 32 described above has a configuration smaller than the outer diameter of the joint portion 33, and the male-side connecting screw portion of the male member 3 has a structure smaller than that of the joint portion 33. A male side flange portion 35 (rotation restricting portion according to the present embodiment) is formed between the 32 and the joint portion 33. The male side flange portion 35 regulates the rotation of screwing of the connecting screw portion 41 into the male side connecting screw portion 32. Specifically, the rotation of the connecting member 4 is restricted by the opening end on the joining portion 33 side coming into contact with the male side flange portion 35. For example, it is preferable that the male member 3 has a structure in which half of the inner surface of the connecting member 4 is screwed by the male side connecting screw portion 32 and the male side flange portion 35. As a result, the rotation of the connecting member 4 can be restricted at a position where the center of the connecting member 4 in the rotation axis direction is located at the joint portion of the female side connecting screw portion 22 and the male side connecting screw portion 32, and the rotation of the connecting member 4 can be restricted in the joined state. Strength and durability can be increased. The structure of the rotation regulating portion that regulates the rotation of the connecting member 4 in the male member 3 is not limited to that of the male side flange portion 35. For example, the structure may be regulated by the screw shape of the male side connecting screw portion 32 or the like.

「連接部材」
連接部材4は、図1に示すように、リング状に構成されている。この連接部材4には、連接ねじ部41が形成されている。連接ねじ部41は、連結ねじ部5と螺合する。具体的には、連接ねじ部41は、図1に示すように、連接部材4の内面に左ねじ状の凹凸を形成することで設けられる。なお、図示した例では、接合状態での強度や耐久性等を得るべく、連接部材4の外径は、鋼管杭の外径よりも大きく構成しているが、強度や耐久性等が得られるのであれば、鋼管杭と同じに構成してもよい。
"Connecting member"
As shown in FIG. 1, the connecting member 4 is formed in a ring shape. A connecting screw portion 41 is formed on the connecting member 4. The connecting screw portion 41 is screwed with the connecting screw portion 5. Specifically, as shown in FIG. 1, the connecting screw portion 41 is provided by forming a left-handed screw-shaped unevenness on the inner surface of the connecting member 4. In the illustrated example, the outer diameter of the connecting member 4 is larger than the outer diameter of the steel pipe pile in order to obtain the strength and durability in the joined state, but the strength and durability can be obtained. If so, it may be configured in the same manner as a steel pipe pile.

このように、鋼管杭用ねじ継手1では、雌ねじ部21及び雄ねじ部31により雄部材3が雌部材2に対して回転嵌合され、連続ねじ部5及び連接ねじ部41により連接部材4が雌部材2及び雄部材3に対して回転嵌合される。なお、具体的には、各回転の軸は同軸となっている。そして、鋼管杭用ねじ継手1では、雌ねじ部21と雌側連結ねじ部22とは締め付けの回転方向が異なっている。また、雄ねじ部31と雄側連結ねじ部32とは締め付けの回転方向が異なっている。詳述すると、雌ねじ部21及び雄ねじ部31は、右ねじ状の凹凸で形成されている、つまり右ねじの螺合構造を有する為、雄部材3は、雌部材2に対して時計回り(右回り)の回転で締め付けられ、反時計回り(左回り)の回転で緩められる。一方、連続ねじ部5(雌側連結ねじ部22及び雄側連結ねじ部32)及び連接ねじ部4は、左ねじ状の凹凸で形成されている、つまり左ねじの螺合構造を有している。その為、雌部材2は、連接部材4に対して反時計回り(左回り)の回転で締め付けられ、時計回り(右回り)の回転で緩められる。また、雄部材3は、連接部材4に対して反時計回り(左回り)の回転で締め付けられ、時計回り(右回り)の回転で緩められる。以下、この雌部材2と雄部材3とが締め付けられる回転を正回転とし、緩められる回転を逆回転として説明する。なお、本実施形態では、前述した構造を例示するが、雌ねじ部21及び雄ねじ部31を左ねじの螺合構造を有するものとし、連続ねじ部5(雌側連結ねじ部22及び雄側連結ねじ部32)及び連接ねじ部4を右ねじの螺合構造を有するものとしてもよい。 As described above, in the threaded joint 1 for steel pipe piles, the male member 3 is rotationally fitted to the female member 2 by the female threaded portion 21 and the male threaded portion 31, and the articulated member 4 is female by the continuous threaded portion 5 and the articulated threaded portion 41. It is rotationally fitted to the member 2 and the male member 3. Specifically, the axes of each rotation are coaxial. In the threaded joint 1 for steel pipe piles, the female threaded portion 21 and the female side connecting threaded portion 22 have different tightening rotation directions. Further, the male screw portion 31 and the male side connecting screw portion 32 have different tightening rotation directions. More specifically, since the female screw portion 21 and the male screw portion 31 are formed of right-handed screw-like irregularities, that is, have a right-handed screwed structure, the male member 3 is clockwise with respect to the female member 2 (right). It is tightened by rotating (turning) and loosened by rotating counterclockwise (counterclockwise). On the other hand, the continuous threaded portion 5 (female side connecting threaded portion 22 and male side connecting threaded portion 32) and the connecting threaded portion 4 are formed of left-handed screw-like unevenness, that is, have a left-handed screwed structure. There is. Therefore, the female member 2 is tightened by rotating counterclockwise (counterclockwise) with respect to the connecting member 4, and is loosened by rotating clockwise (clockwise). Further, the male member 3 is tightened by rotating counterclockwise (counterclockwise) with respect to the connecting member 4, and is loosened by rotating clockwise (clockwise). Hereinafter, the rotation in which the female member 2 and the male member 3 are tightened will be referred to as a forward rotation, and the rotation in which the female member 2 and the male member 3 are loosened will be referred to as a reverse rotation. In the present embodiment, the above-mentioned structure is illustrated, but the female screw portion 21 and the male screw portion 31 are assumed to have a left-hand thread screw structure, and the continuous screw portion 5 (female side connecting screw portion 22 and male side connecting screw). The portion 32) and the articulated screw portion 4 may have a right-handed screw structure.

「鋼管杭用ねじ継手の接合手順」
図4から図7は、鋼管杭用ねじ継手1の接合手順の一例を説明するための図である。鋼管杭用ねじ継手1による接合を行う場合、図4に示すように、まず、連接部材4を雌部材2に回転嵌合させる。具体的には、連接部材4に対して雌部材2が逆回転する方向(図4に示す矢印方向)に連接部材4を回転させ、連接部材4が雌側鍔部24に当接し、回転が規制されるまでねじ込む。これにより、図5に示す状態となる。
"Joining procedure for threaded joints for steel pipe piles"
4 to 7 are views for explaining an example of a joining procedure of the threaded joint 1 for steel pipe piles. When joining with the threaded joint 1 for steel pipe piles, first, as shown in FIG. 4, the connecting member 4 is rotationally fitted to the female member 2. Specifically, the connecting member 4 is rotated in the direction in which the female member 2 rotates in the reverse direction with respect to the connecting member 4 (in the direction of the arrow shown in FIG. 4), the connecting member 4 comes into contact with the female side flange portion 24, and the rotation occurs. Screw in until regulated. As a result, the state shown in FIG. 5 is obtained.

次に、図6に示すように、この連接部材4が回転嵌合された雌部材2に雄部材3を回転嵌合させる。具体的には、雌部材2に対して雄部材3が正回転する方向(図6に示す矢印方向)に雄部材2を回転させ、雌部材2が段差部34に当接し、回転が規制されるまでねじ込む。この際、雌ねじ部21及び雄ねじ部31間の隙間によるガタが生じないように強固に締め込みを行う。これにより、図7に示す状態となる。 Next, as shown in FIG. 6, the male member 3 is rotationally fitted to the female member 2 to which the connecting member 4 is rotationally fitted. Specifically, the male member 2 is rotated in the direction in which the male member 3 rotates forward with respect to the female member 2 (the direction of the arrow shown in FIG. 6), the female member 2 abuts on the step portion 34, and the rotation is restricted. Screw in until At this time, the female screw portion 21 and the male screw portion 31 are firmly tightened so as not to cause play due to the gap between the female screw portions 21 and the male screw portion 31. As a result, the state shown in FIG. 7 is obtained.

最後に、図7に示すように、連接部材4を雄部材3に回転嵌合させる。具体的には、連接部材4に対して雄部材3が逆回転する方向(図7に示す矢印方向)に連接部材4を回転させ、連接部材4が雄側鍔部35に当接し、回転が規制されるまでねじ込む。この際、雄側連結ねじ部32及び連接ねじ部41間の隙間によるガタが生じないように強固に締め込みを行う。これにより、図2及び図3に示す状態となり、鋼管杭用ねじ継手1による接合が完了する。 Finally, as shown in FIG. 7, the connecting member 4 is rotationally fitted to the male member 3. Specifically, the connecting member 4 is rotated in the direction in which the male member 3 rotates in the reverse direction with respect to the connecting member 4 (the direction of the arrow shown in FIG. 7), the connecting member 4 comes into contact with the male side flange portion 35, and the rotation occurs. Screw in until regulated. At this time, the male side connecting screw portion 32 and the connecting screw portion 41 are firmly tightened so as not to cause play due to the gap between them. As a result, the states shown in FIGS. 2 and 3 are obtained, and the joining by the threaded joint 1 for steel pipe pile is completed.

「鋼管杭用ねじ継手の主な作用効果」
本実施形態に係る鋼管杭用ねじ継手1では、雌部材2と雄部材3とは、正回転方向の回転によって締め付けられ、逆回転方向の回転によって緩められる。一方、連接部材4と雌部材2及び雄部材3とは、それぞれ逆回転方向の回転によって締め付けられ、正回転方向の回転によって緩められる。また、連接部材4の連接ねじ部41は、雌側連結ねじ部22及び雄側連結ねじ部32間を連接する。
"Main effects of threaded joints for steel pipe piles"
In the threaded joint 1 for steel pipe piles according to the present embodiment, the female member 2 and the male member 3 are tightened by rotation in the forward rotation direction and loosened by rotation in the reverse rotation direction. On the other hand, the connecting member 4, the female member 2, and the male member 3 are each tightened by rotation in the reverse rotation direction and loosened by rotation in the forward rotation direction. Further, the connecting screw portion 41 of the connecting member 4 connects between the female side connecting screw portion 22 and the male side connecting screw portion 32.

その為、雌部材2及び雄部材3に逆回転方向の力が加わって雌部材2と雄部材3とが緩もうとしても、連接部材4は、その逆回転方向の力で雄部材3に締め付けられるので緩むことがない。連接部材4の連接ねじ部41は、雌側連結ねじ部22及び雄側連結ねじ部32間を連接しているので、連接部材4が緩まないことで、雌部材2と雄部材3とが緩むことはない。なお、言うまでもないが、雌部材2及び雄部材3に正回転方向の力が加わった場合には、雌部材2と雄部材3とが締まるので雌部材2と雄部材3とが緩むことはない。 Therefore, even if a force in the reverse rotation direction is applied to the female member 2 and the male member 3 and the female member 2 and the male member 3 try to loosen, the connecting member 4 is tightened to the male member 3 by the force in the reverse rotation direction. Because it can be loosened, it will not loosen. Since the connecting screw portion 41 of the connecting member 4 is connected between the female side connecting screw portion 22 and the male side connecting screw portion 32, the female member 2 and the male member 3 are loosened by not loosening the connecting member 4. There is no such thing. Needless to say, when a force in the forward rotation direction is applied to the female member 2 and the male member 3, the female member 2 and the male member 3 are tightened, so that the female member 2 and the male member 3 do not loosen. ..

つまり、本実施形態に係る鋼管杭用ねじ継手1によれば、正回転及び逆回転のいずれの力が加わっても緩まない構造とすることができる。つまり、外れない構造とすることができる。具体的には、回転貫入鋼管杭用の継手とした場合、正回転と同様の強い力で回転貫入鋼管杭を逆回転させた場合であっても継手部分が緩んで外れてしまうことがない。 That is, according to the threaded joint 1 for steel pipe piles according to the present embodiment, it is possible to have a structure that does not loosen even when a force of either forward rotation or reverse rotation is applied. That is, the structure can be set so as not to come off. Specifically, in the case of a joint for a rotary penetration steel pipe pile, the joint portion does not loosen and come off even when the rotary penetration steel pipe pile is rotated in the reverse direction with the same strong force as the forward rotation.

「使用態様の一例」
図8は、鋼管杭用ねじ継手1の使用態様の一例について説明する為の図である。本実施形態に係る鋼管杭用ねじ継手1は、前述したように、回転貫入鋼管杭の接合に適している。以下、図8を参照して、鋼管杭用ねじ継手1を用いた回転貫入鋼管杭の接合の概略手順について説明する。
"Example of usage"
FIG. 8 is a diagram for explaining an example of a usage mode of the threaded joint 1 for steel pipe piles. As described above, the threaded joint 1 for steel pipe piles according to the present embodiment is suitable for joining rotary penetration steel pipe piles. Hereinafter, a schematic procedure for joining a rotary penetration steel pipe pile using the threaded joint 1 for a steel pipe pile will be described with reference to FIG.

図8に示すように、2本の回転貫入鋼管杭6,7を接合する場合、埋設の際に上端部となる一端側に雌部材2が設けられた回転貫入鋼管杭(下杭)6と、下端部となる一端側に雄部材3が設けられた回転貫入鋼管杭(上杭)7(図8C参照)とを準備する。例えば、雌部材2及び雄部材3は、それぞれ工場等で予め下杭6及び上杭7に溶接される。なお、図示するように、下杭6の下端部となる他端側には貫入用の羽根が設けられている。 As shown in FIG. 8, when two rotary penetration steel pipe piles 6 and 7 are joined, the rotary penetration steel pipe pile (lower pile) 6 provided with a female member 2 on one end side which is the upper end portion at the time of burying. A rotary penetrating steel pipe pile (upper pile) 7 (see FIG. 8C) provided with a male member 3 on one end side, which is the lower end portion, is prepared. For example, the female member 2 and the male member 3 are welded to the lower pile 6 and the upper pile 7 in advance at a factory or the like, respectively. As shown in the figure, a blade for penetration is provided on the other end side, which is the lower end portion of the lower pile 6.

図8Aに示すように、まず、下杭6を杭打機等の機械(図示略)に取り付ける。なお、図示した例では、既に雌部材2に連接部材4が回転嵌合されている。連接部材4は、下杭6を埋設する現場において雌部材2に回転嵌合させてもよいが、溶接により雌部材2を下杭6に設ける場合には、溶接現場にて雌部材2に連接部材4を回転嵌合させた状態で溶接を行っておくことが好ましい。これにより、溶接の影響を抑えることができる。なお、連接部材4は、後述する下杭6及び上杭7の接合の際に雌部材2に回転嵌合させてもよい。 As shown in FIG. 8A, first, the lower pile 6 is attached to a machine (not shown) such as a pile driver. In the illustrated example, the connecting member 4 is already rotationally fitted to the female member 2. The connecting member 4 may be rotationally fitted to the female member 2 at the site where the lower pile 6 is buried, but when the female member 2 is provided on the lower pile 6 by welding, the connecting member 4 is connected to the female member 2 at the welding site. It is preferable to perform welding in a state where the member 4 is rotationally fitted. As a result, the influence of welding can be suppressed. The connecting member 4 may be rotationally fitted to the female member 2 at the time of joining the lower pile 6 and the upper pile 7, which will be described later.

次に、図8Bに示すように、前述した機械を用いて下杭6を回転貫入させる。具体的には、下杭6を正回転方向に回転させて地中に貫入させる。次に、図8Cに示すように、鋼管杭用ねじ継手1により下杭6に上杭7を接合する。この接合手順は、前述した通りである。 Next, as shown in FIG. 8B, the lower pile 6 is rotationally penetrated by using the above-mentioned machine. Specifically, the lower pile 6 is rotated in the forward rotation direction to penetrate into the ground. Next, as shown in FIG. 8C, the upper pile 7 is joined to the lower pile 6 by the threaded joint 1 for the steel pipe pile. This joining procedure is as described above.

具体的には、雌部材2に雄部材3を回転嵌合させる際、前述した機械に上杭7を取り付け、雌部材2と雄部材3とを機械の回転(具体的には、正回転方向の回転)による力で嵌め合わせる。鋼管杭の接合の場合、鋼管柱等のように複数カ所に杭打ちを行う場合の各鋼管における回転嵌合の位置合わせ(例えば、梁接合部の位置合わせ)を行う必要がないので機械により強固に締め付けることができる。一方、例えば、雌部材2及び雄部材3に連接部材4を回転嵌合させる際は、手(人の力)で行う。なお、雄部材3に連接部材4を回転嵌合させる際の最後の締め付けは治具を用いることで連接部材4を雄部材3に強く締め付けることができる。 Specifically, when the male member 3 is rotationally fitted to the female member 2, the upper pile 7 is attached to the machine described above, and the female member 2 and the male member 3 are rotated in the machine (specifically, in the forward rotation direction). Fit with the force of (rotation). In the case of joining steel pipe piles, it is not necessary to align the rotary fitting (for example, aligning the beam joints) in each steel pipe when pile driving at multiple locations like steel pipe columns, so it is stronger by machine. Can be tightened to. On the other hand, for example, when the connecting member 4 is rotationally fitted to the female member 2 and the male member 3, it is performed by hand (human power). The final tightening when the connecting member 4 is rotationally fitted to the male member 3 can be strongly tightened to the male member 3 by using a jig.

鋼管杭用ねじ継手1により下杭6と上杭7とを接合後、前述した機械を用いて上杭7を回転貫入させる。具体的には、上杭7を正回転方向に回転させて地中に貫入させる。なお、この回転貫入の過程において、前述した雌部材2への雄部材3の回転嵌合を行ってもよい。つまり、機械を用いて上杭7を回転貫入させることで、雌部材2に雄部材3を回転嵌合させ、回転貫入の途中で雄部材3に連接部材4を回転嵌合させてもよい。これにより、工数を減らすことができる。 After joining the lower pile 6 and the upper pile 7 with the threaded joint 1 for steel pipe piles, the upper pile 7 is rotationally penetrated by using the above-mentioned machine. Specifically, the upper pile 7 is rotated in the forward rotation direction to penetrate into the ground. In the process of this rotary penetration, the male member 3 may be rotationally fitted to the female member 2 described above. That is, the male member 3 may be rotationally fitted to the female member 2 by rotationally penetrating the upper pile 7 using a machine, and the connecting member 4 may be rotationally fitted to the male member 3 during the rotational penetration. As a result, the man-hours can be reduced.

そして、図8Dに示すように、上杭7の回転貫入により所定の杭位置(例えば、図示するように下杭6が支持層に貫入する位置)まで下杭6及び上杭7を貫入させて下杭6及び上杭7の埋設を完了する。なお、鋼管杭用ねじ継手1によって接合する杭の本数は、図8に例示した下杭6及び上杭7の2本に限らず、3本以上であってもよい。3本以上の場合には、中杭の上端部となる一端側に雌部材2を設け、下端部となる他端側に雄部材3を設けるようにすればよい。 Then, as shown in FIG. 8D, the lower pile 6 and the upper pile 7 are penetrated to a predetermined pile position (for example, a position where the lower pile 6 penetrates into the support layer as shown in the drawing) by the rotary penetration of the upper pile 7. The burial of the lower pile 6 and the upper pile 7 is completed. The number of piles to be joined by the threaded joint 1 for steel pipe piles is not limited to the two of the lower pile 6 and the upper pile 7 illustrated in FIG. 8, and may be three or more. In the case of three or more, the female member 2 may be provided on one end side which is the upper end portion of the middle pile, and the male member 3 may be provided on the other end side which is the lower end portion.

前述したように、通常は、正回転方向の回転にて下杭6及び上杭7を貫入させるが、所定の杭位置までの中間に介在物やN値(標準貫入試験値)が高い層等があり、貫入が滞るような場合には、正回転方向の回転と逆回転方向の回転とを繰り返し行うことで貫入させることがある。その為、回転貫入鋼管杭の継手部には正回転と逆回転とで同等の強度が求められる。本実施形態に係る鋼管杭用ねじ継手1によれば、前述した構造を有することで、貫入作業において正回転と同等の力で逆回転を行っても雌部材2と雄部材3とが緩まず外れない為、貫入作業を良好に行うことができる。 As described above, normally, the lower pile 6 and the upper pile 7 are penetrated by rotation in the forward rotation direction, but inclusions and layers having a high N value (standard penetration test value) are formed in the middle to a predetermined pile position. If there is a problem and the penetration is delayed, the penetration may be performed by repeating the rotation in the forward rotation direction and the rotation in the reverse rotation direction. Therefore, the joint portion of the rotary penetration steel pipe pile is required to have the same strength in the forward rotation and the reverse rotation. According to the threaded joint 1 for steel pipe piles according to the present embodiment, by having the above-mentioned structure, the female member 2 and the male member 3 do not loosen even if the reverse rotation is performed with the same force as the forward rotation in the penetration work. Since it does not come off, the penetration work can be performed well.

一方で、支持層には不陸がある為、複数個所に杭打ちを行う場合、各鋼管杭の貫入長は各々異なる傾向が強い。その為、支持層が予定よりも深かった場合には低止まりとなり、予定よりも浅かった場合には高止まりとなる。低止まりした杭には継杭を行い、高止まりした杭は切断することで各鋼管杭の長さを調整することができる。この低止まりや高止まりに対応するに際し、貫入後に継手部を外したい場合がある。本実施形態に係る鋼管杭用ねじ継手1によれば、前述した構造を有することで、前述した接合手順とは逆の手順により継手部を外すことができ、このような場合においても貫入作業を良好に行うことができる。具体的には、連接部材4に対して雄部材3が正回転する方向に連接部材4を回転させて雌部材2側に移動させた後、雌部材2と雄部材3とを逆回転方向に回転させることで雌部材2と雄部材3との接続を外し、その後、連接部材4に対して雌部材2が正回転する方向に連接部材4を回転させることで雌部材2と連接部材4との接続を外すことができ、接合前の状態に戻すことができる。 On the other hand, since the support layer has unevenness, when pile driving is performed at a plurality of places, the penetration length of each steel pipe pile tends to be different. Therefore, if the support layer is deeper than planned, it will remain low, and if it is shallower than planned, it will remain high. The length of each steel pipe pile can be adjusted by performing joint piles on the piles that have stopped low and cutting the piles that have stopped high. In order to cope with this low stop or high stop, it may be desired to remove the joint portion after penetration. According to the threaded joint 1 for steel pipe piles according to the present embodiment, by having the above-mentioned structure, the joint portion can be removed by a procedure opposite to the above-mentioned joining procedure, and even in such a case, the penetration work can be performed. It can be done well. Specifically, after the connecting member 4 is rotated in the direction in which the male member 3 rotates in the forward direction with respect to the connecting member 4 and moved to the female member 2 side, the female member 2 and the male member 3 are rotated in the reverse rotation direction. The female member 2 and the male member 3 are disconnected by rotating the female member 2, and then the female member 2 and the connecting member 4 are rotated by rotating the connecting member 4 in the direction in which the female member 2 rotates in the forward direction with respect to the connecting member 4. Can be disconnected and returned to the state before joining.

なお、将来、貫入した杭を抜く必要が生じた場合、下杭6及び上杭7を逆回転方向に回転させることで下杭6及び上杭7を抜くことができるが、このような場合における逆回転においても雌部材2と雄部材3とが緩まず外れない為、引抜作業を良好に行うことができる。また、引き抜きに伴い前述したようにして各部材を外すことができる。 If it becomes necessary to pull out the intruded pile in the future, the lower pile 6 and the upper pile 7 can be pulled out by rotating the lower pile 6 and the upper pile 7 in the reverse rotation direction. In such a case, the lower pile 6 and the upper pile 7 can be pulled out. Since the female member 2 and the male member 3 do not loosen and do not come off even in the reverse rotation, the pulling work can be performed satisfactorily. In addition, each member can be removed as described above with the pulling out.

<2.変形例>
以上、本発明の好適な実施形態について具体的に説明したが、本発明の内容は前述した実施形態に限定されるものではなく種々の変形が可能である。
<2. Modification example>
Although the preferred embodiment of the present invention has been specifically described above, the content of the present invention is not limited to the above-described embodiment and can be modified in various ways.

例えば、前述した一実施形態では、雌部材2及び雄部材3が鋼管杭と別構造であるものについて例示したが、雌部材2及び雄部材3は、鋼管杭と一体的な構造であってもよい。この場合、接合する2本の鋼管杭のうちの一方の鋼管杭自体が雌部材ということになり、他方の鋼管杭自体が雄部材ということになる。例えば、アプセット加工により肉厚とされた一方の鋼管杭の端部及び他方の鋼管杭の端部に、それぞれ、前述した構造の雌部材2及び雄部材3を形成することができる。これにより、雌部材2が設けられた鋼管杭と、雄部材3が設けられた鋼管杭とを、それぞれ溶接や圧着を行わない一体成形品とすることができる。したがって、この場合、雌部材2及び雄部材3が鋼管杭と別構造である場合に生じ得る、雌部材2及び雄部材3と各鋼管杭との接合に起因する不具合(例えば、溶接技術のばらつきによる不具合)が生じることがない。 For example, in the above-described embodiment, the female member 2 and the male member 3 have a structure different from that of the steel pipe pile, but the female member 2 and the male member 3 may have a structure integrated with the steel pipe pile. Good. In this case, one of the two steel pipe piles to be joined is a female member, and the other steel pipe pile itself is a male member. For example, a female member 2 and a male member 3 having the above-mentioned structures can be formed at the end of one steel pipe pile and the end of the other steel pipe pile, which are thickened by upset processing, respectively. As a result, the steel pipe pile provided with the female member 2 and the steel pipe pile provided with the male member 3 can be integrally molded without welding or crimping, respectively. Therefore, in this case, a defect caused by the joint between the female member 2 and the male member 3 and each steel pipe pile, which may occur when the female member 2 and the male member 3 have a different structure from the steel pipe pile (for example, variation in welding technology). (Problem due to) does not occur.

1・・・鋼管杭用ねじ継手、2・・・雌部材、3・・・雄部材、4・・・連接部材、5・・・連続ねじ部、21・・・雌ねじ部、22・・・雌側連結ねじ部、31・・・雄ねじ部、32・・・雄側連結ねじ部、41・・・連接ねじ部 1 ... Threaded joint for steel pipe pile, 2 ... Female member, 3 ... Male member, 4 ... Connecting member, 5 ... Continuous threaded part, 21 ... Female threaded part, 22 ... Female side connecting screw part, 31 ... Male screw part, 32 ... Male side connecting screw part, 41 ... Connecting screw part

本発明は、
雌ねじ部を有する雌部材と、
前記雌ねじ部と螺合する雄ねじ部を有する雄部材と、
前記雌ねじ部及び前記雄ねじ部により回転嵌合された前記雌部材及び前記雄部材間を連接する連接部材とを備え、
前記雌部材は、前記雌ねじ部とは締め付けの回転方向が異なる雌側連結ねじ部をさらに有し、
前記雄部材は、前記雌ねじ部及び前記雄ねじ部により前記雌部材と回転嵌合させた状態において前記雌側連結ねじ部と連続して連続ねじ部を形成する、前記雄ねじ部とは締め付けの回転方向が異なる雄側連結ねじ部をさらに有し、
前記連接部材は、前記連続ねじ部と螺合し、前記雌側連結ねじ部及び前記雄側連結ねじ部間を連接する連接ねじ部を有し、
前記雄部材は、前記連続ねじ部及び前記連接ねじ部により前記連接部材を締め付けた場合に、前記連接部材の端部と当接して前記連接部材の回転を規制する雄側鍔部をさらに有し、
前記雌ねじ部、前記雄ねじ部、前記連続ねじ部及び前記連接ねじ部は、それぞれ角ねじで構成されている
鋼管杭用ねじ継手である。
The present invention
A female member with a female thread and
A male member having a male threaded portion to be screwed with the female threaded portion,
The female member and the connecting member for connecting between the female member and the male member, which are rotationally fitted by the female screw portion and the male screw portion, are provided.
The female member further has a female-side connecting screw portion whose tightening rotation direction is different from that of the female screw portion.
The male member forms a continuous threaded portion continuously with the female side connecting threaded portion in a state where the male member is rotationally fitted to the female member by the female threaded portion and the male threaded portion. Further has different male side connecting threads,
The connecting member is screwed with the continuous thread portion, have a connecting screw portion for connecting between the female-side connecting screw portion and the male connecting screw portion,
The male member further has a male side flange portion that comes into contact with an end portion of the connecting member and regulates rotation of the connecting member when the connecting member is tightened by the continuous screw portion and the connecting screw portion. ,
The female threaded portion, the male threaded portion, the continuous threaded portion, and the articulated threaded portion are threaded joints for steel pipe piles each composed of square threads.

また、本発明は、
雌ねじ部を有する雌部材と、
前記雌ねじ部と螺合する雄ねじ部を有する雄部材と、
前記雌ねじ部及び前記雄ねじ部により回転嵌合された前記雌部材及び前記雄部材間を連接する連接部材とを備え、
前記雌部材は、雌側連結ねじ部をさらに有し、
前記雄部材は、前記雌ねじ部及び前記雄ねじ部により前記雌部材と回転嵌合させた状態において前記雌側連結ねじ部と連続して連続ねじ部を形成する雄側連結ねじ部をさらに有し、
前記連接部材は、前記連続ねじ部と螺合し、前記雌側連結ねじ部及び前記雄側連結ねじ部間を連接する連接ねじ部を有し、
前記雌ねじ部及び前記雄ねじ部が右ねじの螺合構造を有し、前記連続ねじ部及び前記連接ねじ部が左ねじの螺合構造を有する、又は、前記雌ねじ部及び前記雄ねじ部が左ねじの螺合構造を有し、前記連続ねじ部及び前記連接ねじ部が右ねじの螺合構造を有し、
前記雄部材は、前記連続ねじ部及び前記連接ねじ部により前記連接部材を締め付けた場合に、前記連接部材の端部と当接して前記連接部材の回転を規制する雄側鍔部をさらに有し、
前記雌ねじ部、前記雄ねじ部、前記連続ねじ部及び前記連接ねじ部は、それぞれ角ねじで構成されている
鋼管杭用ねじ継手である。
In addition, the present invention
A female member with a female thread and
A male member having a male threaded portion to be screwed with the female threaded portion,
The female member and the connecting member for connecting between the female member and the male member, which are rotationally fitted by the female screw portion and the male screw portion, are provided.
The female member further has a female side connecting screw portion.
The male member further has a male-side connecting threaded portion that forms a continuous threaded portion continuously with the female-side connecting threaded portion in a state of being rotationally fitted to the female member by the female-threaded portion and the male-threaded portion.
The connecting member has a connecting threaded portion that is screwed with the continuous threaded portion and is connected between the female side connecting threaded portion and the male side connecting threaded portion.
The female threaded portion and the male threaded portion have a right-handed threaded structure, the continuous threaded portion and the articulated threaded portion have a left-handed threaded threaded structure, or the female-threaded portion and the male-threaded portion have a left-handed threaded structure. has a threaded structure, the continuous threaded section and the connecting thread portion have a screwed structure right screw,
The male member further has a male side flange portion that comes into contact with an end portion of the connecting member and regulates rotation of the connecting member when the connecting member is tightened by the continuous screw portion and the connecting screw portion. ,
The female threaded portion, the male threaded portion, the continuous threaded portion, and the articulated threaded portion are threaded joints for steel pipe piles each composed of square threads.

Claims (4)

雌ねじ部を有する雌部材と、
前記雌ねじ部と螺合する雄ねじ部を有する雄部材と、
前記雌ねじ部及び前記雄ねじ部により回転嵌合された前記雌部材及び前記雄部材間を連接する連接部材とを備え、
前記雌部材は、前記雌ねじ部とは締め付けの回転方向が異なる雌側連結ねじ部をさらに有し、
前記雄部材は、前記雌ねじ部及び前記雄ねじ部により前記雌部材と回転嵌合させた状態において前記雌側連結ねじ部と連続して連続ねじ部を形成する、前記雄ねじ部とは締め付けの回転方向が異なる雄側連結ねじ部をさらに有し、
前記連接部材は、前記連続ねじ部と螺合し、前記雌側連結ねじ部及び前記雄側連結ねじ部間を連接する連接ねじ部を有する
鋼管杭用ねじ継手。
A female member with a female thread and
A male member having a male threaded portion to be screwed with the female threaded portion,
The female member and the connecting member for connecting between the female member and the male member, which are rotationally fitted by the female screw portion and the male screw portion, are provided.
The female member further has a female-side connecting screw portion whose tightening rotation direction is different from that of the female screw portion.
The male member forms a continuous threaded portion continuously with the female side connecting threaded portion in a state where the male member is rotationally fitted to the female member by the female threaded portion and the male threaded portion. Further has different male side connecting threads,
The connecting member is a threaded joint for a steel pipe pile having a connecting threaded portion that is screwed with the continuous threaded portion and is connected between the female side connecting threaded portion and the male side connecting threaded portion.
雌ねじ部を有する雌部材と、
前記雌ねじ部と螺合する雄ねじ部を有する雄部材と、
前記雌ねじ部及び前記雄ねじ部により回転嵌合された前記雌部材及び前記雄部材間を連接する連接部材とを備え、
前記雌部材は、雌側連結ねじ部をさらに有し、
前記雄部材は、前記雌ねじ部及び前記雄ねじ部により前記雌部材と回転嵌合させた状態において前記雌側連結ねじ部と連続して連続ねじ部を形成する雄側連結ねじ部をさらに有し、
前記連接部材は、前記連続ねじ部と螺合し、前記雌側連結ねじ部及び前記雄側連結ねじ部間を連接する連接ねじ部を有し、
前記雌ねじ部及び前記雄ねじ部が右ねじの螺合構造を有し、前記連続ねじ部及び前記連接ねじ部が左ねじの螺合構造を有する、又は、前記雌ねじ部及び前記雄ねじ部が左ねじの螺合構造を有し、前記連続ねじ部及び前記連接ねじ部が右ねじの螺合構造を有する
鋼管杭用ねじ継手。
A female member with a female thread and
A male member having a male threaded portion to be screwed with the female threaded portion,
The female member and the connecting member for connecting between the female member and the male member, which are rotationally fitted by the female screw portion and the male screw portion, are provided.
The female member further has a female side connecting screw portion.
The male member further has a male-side connecting threaded portion that forms a continuous threaded portion continuously with the female-side connecting threaded portion in a state of being rotationally fitted to the female member by the female-threaded portion and the male-threaded portion.
The connecting member has a connecting threaded portion that is screwed with the continuous threaded portion and is connected between the female side connecting threaded portion and the male side connecting threaded portion.
The female threaded portion and the male threaded portion have a right-handed threaded structure, the continuous threaded portion and the articulated threaded portion have a left-handed threaded threaded structure, or the female-threaded portion and the male-threaded portion have a left-handed threaded structure. A threaded joint for a steel pipe pile having a threaded structure in which the continuous threaded portion and the articulated threaded portion have a right-handed threaded structure.
前記連続ねじ部及び前記連接ねじ部による前記連接部材の回転を規制する回転規制部を有し、
前記回転規制部は、前記連接部材の回転軸方向における中心が前記雌側連結ねじ部及び前記雄側連結ねじ部の継目位置となる位置で前記連接部材の回転を規制する
請求項1又は2に記載の鋼管杭用ねじ継手。
It has a rotation regulating portion that regulates the rotation of the connecting member by the continuous screw portion and the connecting screw portion.
According to claim 1 or 2, the rotation restricting portion regulates the rotation of the connecting member at a position where the center of the connecting member in the rotation axis direction is a joint position between the female side connecting screw portion and the male side connecting screw portion. Described threaded joints for steel pipe piles.
前記雌ねじ部、前記雄ねじ部、前記連続ねじ部及び前記連接ねじ部は、それぞれ角ねじで構成されている請求項1から3の何れかに記載の鋼管杭用ねじ継手。
The threaded joint for a steel pipe pile according to any one of claims 1 to 3, wherein the female threaded portion, the male threaded portion, the continuous threaded portion, and the articulated threaded portion are each composed of square threads.
JP2019210994A 2019-11-22 2019-11-22 Threaded joint for steel pipe pile Active JP6733978B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019210994A JP6733978B1 (en) 2019-11-22 2019-11-22 Threaded joint for steel pipe pile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2019210994A JP6733978B1 (en) 2019-11-22 2019-11-22 Threaded joint for steel pipe pile

Publications (2)

Publication Number Publication Date
JP6733978B1 JP6733978B1 (en) 2020-08-05
JP2021080792A true JP2021080792A (en) 2021-05-27

Family

ID=71892484

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2019210994A Active JP6733978B1 (en) 2019-11-22 2019-11-22 Threaded joint for steel pipe pile

Country Status (1)

Country Link
JP (1) JP6733978B1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1143938A (en) * 1997-07-29 1999-02-16 Kubota Corp Steel pipe pile connection part
JP2002256549A (en) * 2001-03-01 2002-09-11 Kawasaki Steel Corp Connecting structure of steel pipe and steel pipe pile
JP2016050606A (en) * 2014-08-29 2016-04-11 株式会社東部 Steel pipe pile joint structure
JP2016151114A (en) * 2015-02-17 2016-08-22 鹿島建設株式会社 Connection structure of steel pipe sheet pile
JP2016169581A (en) * 2015-03-16 2016-09-23 Jfeスチール株式会社 Multi-row screw joint and steel pipe with joint having multi-row screw joint
JP2019143314A (en) * 2018-02-17 2019-08-29 日鉄精密加工株式会社 Alignment method of bearing plate
JP2019163781A (en) * 2018-03-19 2019-09-26 日本製鉄株式会社 Connecting structure of steel pipe

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1143938A (en) * 1997-07-29 1999-02-16 Kubota Corp Steel pipe pile connection part
JP2002256549A (en) * 2001-03-01 2002-09-11 Kawasaki Steel Corp Connecting structure of steel pipe and steel pipe pile
JP2016050606A (en) * 2014-08-29 2016-04-11 株式会社東部 Steel pipe pile joint structure
JP2016151114A (en) * 2015-02-17 2016-08-22 鹿島建設株式会社 Connection structure of steel pipe sheet pile
JP2016169581A (en) * 2015-03-16 2016-09-23 Jfeスチール株式会社 Multi-row screw joint and steel pipe with joint having multi-row screw joint
JP2019143314A (en) * 2018-02-17 2019-08-29 日鉄精密加工株式会社 Alignment method of bearing plate
JP2019163781A (en) * 2018-03-19 2019-09-26 日本製鉄株式会社 Connecting structure of steel pipe

Also Published As

Publication number Publication date
JP6733978B1 (en) 2020-08-05

Similar Documents

Publication Publication Date Title
KR102065742B1 (en) Connector of steel piles
JP2011032783A (en) Pile joint structure and connection member
JPH06330562A (en) Connector for pipe structural material and assembling method thereof
JP2021080792A (en) Screw joint for steel pipe pile
JP3135948U (en) Steel pipe pile joint structure
JP7190383B2 (en) Steel pipe connection structure
JP4137683B2 (en) Joint structure of upper and lower piles in rotary press-fit piles
WO2013030970A1 (en) Anti-seizing nut
JP2994252B2 (en) Joint structure between ball joint and rod of space truss
JP4347149B2 (en) Mechanical joint of a longitudinal connection device for piles with means for preventing looseness
JPH09137446A (en) Screw joint structure of steel pipe pile or the like
JP2004270204A (en) Joint structure of steel pipe and joining method of steel pipe
JP7368142B2 (en) Through-hole positioning jig and through-hole positioning method
WO2010087020A1 (en) Tube body connection structure and connection method for tube body connection structure
JP7163937B2 (en) Steel pipe joining joint, method for joining steel pipes using said steel pipe joining joint, and steel pipe sheet pile
JP6007863B2 (en) Joint structure of steel pipes constituting rotating piles
JP2830988B2 (en) Sleeve body with adjustable axial length in joining device for structural members
JP2003105755A (en) Joint structure of different diameter steel pipe piles
JP6190913B1 (en) Liner insertion jig
JP2004293230A (en) Connection structure of steel pipe and its connecting method
JP2003247231A (en) Steel pipe pile
JPH116145A (en) Steel pipe pile equipped with threaded joint part
JP2748100B2 (en) Space truss fittings
JP2018172906A (en) Joint structure
JP2021143526A (en) Joint structure

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20191122

A871 Explanation of circumstances concerning accelerated examination

Free format text: JAPANESE INTERMEDIATE CODE: A871

Effective date: 20191122

A975 Report on accelerated examination

Free format text: JAPANESE INTERMEDIATE CODE: A971005

Effective date: 20200110

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20200303

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20200420

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20200630

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20200706

R150 Certificate of patent or registration of utility model

Ref document number: 6733978

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250