JP6854939B2 - Pile body joint, pile body connection structure and pile body connection method - Google Patents

Pile body joint, pile body connection structure and pile body connection method Download PDF

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JP6854939B2
JP6854939B2 JP2020021278A JP2020021278A JP6854939B2 JP 6854939 B2 JP6854939 B2 JP 6854939B2 JP 2020021278 A JP2020021278 A JP 2020021278A JP 2020021278 A JP2020021278 A JP 2020021278A JP 6854939 B2 JP6854939 B2 JP 6854939B2
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pile body
pile
joint
fitting
shape
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JP2020133391A (en
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北村 精男
北村  精男
昌彦 吉川
昌彦 吉川
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GIKEN LTD.
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Priority to AU2020220777A priority Critical patent/AU2020220777B2/en
Priority to SG11202108809QA priority patent/SG11202108809QA/en
Priority to PCT/JP2020/005338 priority patent/WO2020166607A1/en
Priority to BR112021015517-1A priority patent/BR112021015517B1/en
Priority to US17/429,772 priority patent/US11519149B2/en
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/24Prefabricated piles
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/24Prefabricated piles
    • E02D5/28Prefabricated piles made of steel or other metals
    • E02D5/285Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/52Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
    • E02D5/523Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments composed of segments
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/52Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
    • E02D5/523Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments composed of segments
    • E02D5/526Connection means between pile segments
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/20Placing by pressure or pulling power
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/26Placing by using several means simultaneously

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Piles And Underground Anchors (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)

Description

本発明は、杭体継手、杭体連結構造及び杭体連結方法に関する。 The present invention relates to a pile body joint, a pile body connecting structure, and a pile body connecting method.

地中に埋設する杭体に十分な長さがない場合には、複数の杭体を連結して埋設する場合がある。 If the piles to be buried in the ground are not long enough, a plurality of piles may be connected and buried.

ここで、杭体を溶接によって連結する溶接継ぎでは、埋設現場での溶接作業に時間を要し、かつ溶接部の検査も必要であるため、多くの時間と労力を要する。また、埋設現場の天候や溶接工の技量によっても溶接の品質にばらつきが生じる可能性があり、さらに、空頭制限等の現場条件によっては杭体同士の溶接自体ができない場合がある。 Here, in the welded joint in which the pile bodies are connected by welding, a lot of time and labor are required because the welding work at the burial site requires time and the inspection of the welded portion is also required. In addition, the quality of welding may vary depending on the weather at the burial site and the skill of the welder, and further, depending on the site conditions such as short head restrictions, welding itself between piles may not be possible.

一方、埋設現場での溶接作業を伴わない機械式継手として、例えば、特許文献1には、複数の円筒堀作部材を円筒状のジョイント部材で連結することが開示されている。この円筒堀作部材には一端部の外周に爪が凸設され、ジョイント部材は上記爪を嵌合、位置決めをする。 On the other hand, as a mechanical joint that does not involve welding work at the burial site, for example, Patent Document 1 discloses that a plurality of cylindrical excavation members are connected by a cylindrical joint member. A claw is projected on the outer periphery of one end of the cylindrical excavation member, and the joint member fits and positions the claw.

特開昭63−40088号公報Japanese Unexamined Patent Publication No. 63-4008

しかしながら、特許文献1に記載の構造では、円筒堀作部材の爪とジョイント部材とが嵌合して位置決めが行われるものの、連結させる円筒堀作部材を強固に一体化するものではない。 However, in the structure described in Patent Document 1, although the claw of the cylindrical excavation member and the joint member are fitted and positioned, the cylindrical excavation member to be connected is not firmly integrated.

そこで本発明は、連結させる杭体を強固に一体化できる、杭体継手、杭体連結構造及び杭体連結方法を提供することを目的とする。 Therefore, an object of the present invention is to provide a pile body joint, a pile body connecting structure, and a pile body connecting method capable of firmly integrating the pile bodies to be connected.

本発明の杭体継手は、2本の杭体を連結する杭体継手であって、突部が周面に設けられた前記杭体が端部から嵌め込まれる管状の本体部と、前記杭体を嵌め込んで回転させることで前記突部に嵌合するように、前記本体部に形成される嵌合部と、を備え、前記嵌合部は、前記杭体の回転方向で前記本体部の前記端部から離れるように傾斜する面を有する第1形状、又は、前記突部と前記杭体との間に嵌入する第2形状が形成される。 The pile body joint of the present invention is a pile body joint that connects two pile bodies, and has a tubular main body portion in which the pile body having a protrusion on the peripheral surface is fitted from an end portion and the pile body. The fitting portion is provided with a fitting portion formed on the main body portion so as to be fitted to the protrusion portion by fitting and rotating the fitting portion, and the fitting portion is formed on the main body portion in the rotation direction of the pile body. A first shape having a surface inclined away from the end portion or a second shape fitted between the protrusion and the pile body is formed.

本構成によれば、嵌合部には、杭体の回転方向で本体部の端部から離れるように傾斜する面を有する第1形状が形成されているので、杭体を杭体継手に嵌め込んで回転させると、杭体は嵌め込まれた方向、換言すると杭体継手で連結される他方の杭体の方向に進む。この結果、連結される2本の杭体の端部同士が当接し、かつ嵌合部の傾斜した面とこれに対向する突部の面も当接し、2本の杭体と杭体継手とで締まり合う。このように嵌合部に形成された第1形状により、連結される2本の杭体と杭体継手とを強固に一体化できる。 According to this configuration, the fitting portion is formed with a first shape having a surface that is inclined so as to be separated from the end portion of the main body portion in the rotation direction of the pile body, so that the pile body is fitted into the pile body joint. When it is pushed in and rotated, the pile body advances in the direction in which it is fitted, in other words, in the direction of the other pile body connected by the pile body joint. As a result, the ends of the two pile bodies to be connected are in contact with each other, and the inclined surface of the fitting portion and the surface of the protruding portion facing the contact are also in contact with each other, and the two pile bodies and the pile body joint are formed. Tighten up with. Due to the first shape formed in the fitting portion in this way, the two pile bodies to be connected and the pile body joint can be firmly integrated.

また、嵌合部には、突部と杭体との間に嵌入する第2形状が形成されるので、突部と嵌合部とに所謂クサビ効果を生じさせ、例えば、埋設している杭体を引き抜く場合に発生する可能性のある突部と嵌合部とのズレの発生を防止できる。このように嵌合部に形成された第2形状により、杭体と杭体継手とを強固に一体化できる。 Further, since the fitting portion is formed with a second shape that is fitted between the protrusion and the pile body, a so-called wedge effect is generated between the protrusion and the fitting portion, for example, a pile that is buried. It is possible to prevent the occurrence of misalignment between the protrusion and the fitting portion, which may occur when the body is pulled out. Due to the second shape formed in the fitting portion in this way, the pile body and the pile body joint can be firmly integrated.

本発明の杭体継手は、前記嵌合部に前記第1形状を形成する前記面に前記第2形状が形成されてもよい。本構成によれば、連結される2本の杭体と杭体継手とをより強固に一体化できる。 In the pile body joint of the present invention, the second shape may be formed on the surface that forms the first shape on the fitting portion. According to this configuration, the two pile bodies to be connected and the pile body joint can be more firmly integrated.

本発明の杭体継手は、前記突部が平面状であり、平面内側が中抜きされてもよい。突部の外周を溶接して突部を杭体に設けるとビード(溶接痕)が突部の外周に生じ、ビードが突部と嵌合部との嵌合の障害となる可能性がある。本構成によれば、中抜きされている平面内側を溶接することでビードが平面内側に形成されることになり、ビードが突部と嵌合部との嵌合の障害となることを防止できる。 In the pile body joint of the present invention, the protrusion may be flat and the inside of the flat surface may be hollowed out. When the outer periphery of the protrusion is welded and the protrusion is provided on the pile body, a bead (welding mark) is generated on the outer circumference of the protrusion, and the bead may hinder the fitting between the protrusion and the fitting portion. According to this configuration, the bead is formed on the inside of the plane by welding the inside of the flat surface that is hollowed out, and it is possible to prevent the bead from hindering the fitting between the protrusion and the fitting portion. ..

本発明の杭体継手は、前記杭体には、周方向に非等角度間隔で配置された複数の前記突部が設けられ、前記本体部には、複数の前記突部に対応する複数の前記嵌合部が形成されてもよい。本構成によれば、杭体に対して相対的に高い強度を与えたい横断面方向の位置に突部を設けることで、連結した杭体の強度を簡易な構成で高めることができる。 In the pile body joint of the present invention, the pile body is provided with a plurality of the protrusions arranged at non-equal angles in the circumferential direction, and the main body is provided with a plurality of protrusions corresponding to the plurality of protrusions. The fitting portion may be formed. According to this configuration, the strength of the connected piles can be increased by a simple configuration by providing a protrusion at a position in the cross-sectional direction in which a relatively high strength is desired to be given to the piles.

本発明の杭体継手は、前記本体部に少なくとも前記嵌合部を覆う補強部材が設けられてもよい。本構成によれば、本体部における嵌合部が形成された領域は相対的に強度が低下するので、低下した強度を補強部材によって高めることができる。 In the pile body joint of the present invention, a reinforcing member that covers at least the fitting portion may be provided on the main body portion. According to this configuration, the strength of the region where the fitting portion is formed in the main body portion is relatively reduced, so that the reduced strength can be increased by the reinforcing member.

本発明の杭体継手は、前記補強部材に固定され、前記突部が前記嵌合部から外れることを防止する外れ防止部材が備えられてもよい。本構成による外れ防止部材の補強部材への固定手法は例えばボルト留めや、外れ防止部材に形成されたピンを補強部材に形成された穴に挿入する手法であり、これにより嵌合部から杭体に設けられた突部が外れることを確実に防止できる。 The pile joint of the present invention may be provided with a detachment prevention member which is fixed to the reinforcing member and prevents the protrusion from being detached from the fitting portion. The method of fixing the detachment prevention member to the reinforcing member by this configuration is, for example, bolting or a method of inserting a pin formed in the detachment prevention member into a hole formed in the reinforcing member, thereby connecting the fitting portion to the pile body. It is possible to surely prevent the protrusion provided on the surface from coming off.

本発明の杭体継手は、前記補強部材に前記嵌合部への前記突部の挿入を確認するための孔が形成されてもよい。本構成によれば、補強部材が設けられても嵌合部への突部の挿入状態を作業者が目視で確認できる。 In the pile body joint of the present invention, a hole for confirming the insertion of the protrusion into the fitting portion may be formed in the reinforcing member. According to this configuration, the operator can visually confirm the inserted state of the protrusion into the fitting portion even if the reinforcing member is provided.

本発明の杭体継手は、前記嵌合部に前記杭体の軸線方向に複数の前記第1形状、又は、複数の前記第2形状が形成されてもよい。本構成によれば、第1形状又は第2形状が一つの嵌合部に複数形成されるので、連結させる杭体を強固に一体化できる。 In the pile body joint of the present invention, a plurality of the first shapes or a plurality of the second shapes may be formed in the fitting portion in the axial direction of the pile body. According to this configuration, since a plurality of first shapes or second shapes are formed in one fitting portion, the pile bodies to be connected can be firmly integrated.

本発明の杭体継手は、前記2本の杭体のうち一方の前記杭体は、地中に埋設される前記杭体であり、他方の前記杭体は、前記一方の杭体を埋設するために補助的に用いられる杭体であり、前記一方の杭体の上方に配置されてもよい。本構成によれば、一方の杭体の埋設を補助するために用いられる他方の杭体を杭体継手によって連結することで、杭体を吊り下げることなく埋設できる。 In the pile body joint of the present invention, one of the two pile bodies is the pile body to be buried in the ground, and the other pile body is to bury the one pile body. It is a pile body used as an auxiliary for the purpose, and may be arranged above the one pile body. According to this configuration, by connecting the other pile body used to assist the burying of one pile body with a pile body joint, the pile body can be buried without being suspended.

本発明の杭体連結構造は、突部が周面に設けられた杭体と、前記杭体が端部から嵌め込まれる管状の本体部を有し、前記杭体を嵌め込んで回転させることで前記突部に嵌合する嵌合部に、前記杭体の回転方向で前記本体部の前記端部から離れるように傾斜する面を有する第1形状、又は前記突部と前記杭体との間に嵌入する第2形状が形成される杭体継手と、を備える。本構成によれば、連結される2本の杭体と杭体継手とをより強固に一体化できる。 The pile body connecting structure of the present invention has a pile body having a protrusion provided on a peripheral surface and a tubular main body portion into which the pile body is fitted from an end portion, and the pile body is fitted and rotated. A first shape having a surface in which the fitting portion fitted to the protrusion has a surface that inclines so as to be separated from the end of the main body in the rotation direction of the pile, or between the protrusion and the pile. A pile body joint in which a second shape is formed to be fitted into the pile body joint is provided. According to this configuration, the two pile bodies to be connected and the pile body joint can be more firmly integrated.

本発明の杭体連結方法は、突部が周面に設けられた杭体が端部から嵌め込まれる管状の本体部を有し、前記杭体を嵌め込んで回転させることで前記突部に嵌合する嵌合部に、前記杭体の回転方向で前記本体部の前記端部から離れるように傾斜する面を有する第1形状、又は前記突部と前記杭体との間に嵌入する第2形状が形成される杭体継手によって2本の前記杭体を連結する杭体連結方法であって、前記杭体を埋設する第1工程と、前記埋設された前記杭体に対して他の前記杭体を立て、2本の前記杭体が前記杭体継手によって嵌合するように他の前記杭体を回転させる第2工程と、を有する。本構成によれば、連結される2本の杭体と杭体継手とをより強固に一体化できる。 The pile body connecting method of the present invention has a tubular main body portion in which a pile body having a protrusion provided on a peripheral surface is fitted from an end portion, and the pile body is fitted and rotated to fit into the protrusion. A first shape having a surface in which the fitting portion is inclined so as to be separated from the end portion of the main body portion in the rotation direction of the pile body, or a second shape to be fitted between the protrusion portion and the pile body. It is a pile body connecting method of connecting two said pile bodies by a pile body joint in which a shape is formed, in which the first step of burying the pile body and the other said above with respect to the buried pile body. It has a second step of erecting a pile body and rotating another pile body so that the two pile bodies are fitted by the pile body joint. According to this configuration, the two pile bodies to be connected and the pile body joint can be more firmly integrated.

本発明の杭体連結方法は、突部が周面に設けられた杭体が端部から嵌め込まれる管状の本体部を有し、前記杭体を嵌め込んで回転させることで前記突部に嵌合する嵌合部に、前記杭体の回転方向で前記本体部の前記端部から離れるように傾斜する面を有する第1形状、又は前記突部と前記杭体との間に嵌入する第2形状が形成される杭体継手によって、第1杭体と第2杭体とを連結する杭体連結方法であって、前記第2杭体を圧入機が備える第2把持手段によって把持する第1工程と、前記第1杭体を前記圧入機が備える第1把持手段によって把持する第2工程と、前記第1杭体と前記第2杭体との端部が当接するように前記第1把持手段を移動させ、前記第1把持手段又は前記第2把持手段を回転させることで、前記第1杭体と前記第2杭体とを前記杭体継手で連結する第3工程と、を有する。本構成によれば、第1把持手段と第2把持手段で各々の杭体を把持しながら、杭体継手で2本の杭体を連結させるので、2本の杭体の連結をより確実に行うことができる。 The pile body connecting method of the present invention has a tubular main body portion in which a pile body having a protrusion provided on a peripheral surface is fitted from an end portion, and the pile body is fitted and rotated to fit into the protrusion. A first shape having a surface in which the fitting portion is inclined so as to be separated from the end portion of the main body portion in the rotation direction of the pile body, or a second shape to be fitted between the protrusion portion and the pile body. A pile body connecting method in which a first pile body and a second pile body are connected by a pile body joint in which a shape is formed, and a first gripping means for gripping the second pile body by a second gripping means provided in a press-fitting machine. The first gripping process, the second step of gripping the first pile body by the first gripping means provided in the press-fitting machine, and the first gripping so that the ends of the first pile body and the second pile body are in contact with each other. It has a third step of connecting the first pile body and the second pile body with the pile body joint by moving the means and rotating the first gripping means or the second gripping means. According to this configuration, the two pile bodies are connected by the pile body joint while gripping each pile body by the first gripping means and the second gripping means, so that the connection of the two pile bodies is more reliable. It can be carried out.

本発明によれば、連結させる杭体を強固に一体化できる。 According to the present invention, the pile bodies to be connected can be firmly integrated.

第1実施形態の杭体及びジョイントの外観図であり、(a)はジョイントの横断面図、(b)はジョイントの側面図、(c)は杭体の横断面図、(d)は杭体の側面図である。It is an external view of the pile body and the joint of the first embodiment, (a) is a cross-sectional view of the joint, (b) is a side view of the joint, (c) is a cross-sectional view of the pile body, and (d) is a pile. It is a side view of the body. 第1実施形態の杭体及びジョイントの連結方法を示す図であり、(a)はジョイントに杭体を挿入する工程、(b)はジョイントに対して杭体を回転させる工程を示す図である。It is a figure which shows the connection method of the pile body and a joint of 1st Embodiment, (a) is a figure which shows the process of inserting a pile body into a joint, (b) is a figure which shows the process of rotating a pile body with respect to a joint. .. 第1実施形態のキーと嵌合部とが嵌合した状態を示す拡大図である。It is an enlarged view which shows the state which the key of 1st Embodiment and the fitting part are fitted. 第1実施形態の杭体におけるキーが設けられた部分及びジョイントにおける嵌合部が形成された部分の縦断面図であり、(a)は杭体とジョイントを個別に示した図、(b)は杭体とジョイントを連結した状態を示す図である。It is a vertical cross-sectional view of the part where the key is provided and the part where the fitting part in the joint is formed in the pile body of 1st Embodiment, (a) is the figure which showed the pile body and joint individually, (b). Is a diagram showing a state in which the pile body and the joint are connected. 第1実施形態の2本の杭体を連結する際に杭体及びジョイントの荷重伝達個所を示す図であり、(a)は杭体の圧入時の荷重伝達箇所を示し、(b)は埋設されている杭体の引き抜き時の荷重伝達箇所を示し、(c)は杭体の回転時の荷重伝達箇所を示す。It is a figure which shows the load transmission part of a pile body and a joint when connecting two pile bodies of 1st Embodiment, (a) shows the load transmission place at the time of press-fitting of a pile body, (b) is buried. The load transmission point at the time of pulling out the pile body is shown, and (c) shows the load transmission point at the time of rotation of the pile body. 第1実施形態の2本の杭体を連結させて圧入機を用いて埋設する場合の工程を示す図であり、(a),(b)は一方の杭体にジョイントを嵌め込む工程を示し、(c)は2本の杭体がジョイントによって連結するように杭体を回転させる工程を示す。It is a figure which shows the process in the case of connecting two pile bodies of 1st Embodiment and burying by using a press-fitting machine, (a), (b) show the process of fitting a joint into one pile body. , (C) show a step of rotating the pile body so that the two pile bodies are connected by a joint. 第1実施形態の補強部材の外観図である。It is an external view of the reinforcing member of 1st Embodiment. 第1実施形態の杭体及びジョイントの連結方法を示す図であり、(a)はジョイントに杭体を挿入する工程、(b)はジョイントに対して杭体を回転させる工程を示す図である。It is a figure which shows the connection method of the pile body and a joint of 1st Embodiment, (a) is a figure which shows the process of inserting a pile body into a joint, (b) is a figure which shows the process of rotating a pile body with respect to a joint. .. 第1実施形態のストッパを示す図であり、(a)はジョイントと杭体とを連結した後のストッパの挿入状態を示し、(b)はストッパの外観図、(c)は片持ちスプリングバックによるピンの位置変動を示す図である。It is a figure which shows the stopper of 1st Embodiment, (a) shows the insertion state of the stopper after connecting a joint and a pile body, (b) is an external view of a stopper, (c) is a cantilever spring back. It is a figure which shows the position change of the pin by. 第1実施形態のストッパの変形例を示す図であり、(a)はジョイントと杭体とを連結した後のストッパの挿入状態を示し、(b)はストッパの外観図である。It is a figure which shows the modification of the stopper of 1st Embodiment, (a) shows the insertion state of the stopper after connecting a joint and a pile body, and (b) is the external view of the stopper. 第1実施形態の杭体及びジョイントの変形例の外観図である。It is an external view of the modified example of the pile body and the joint of 1st Embodiment. 第1実施形態の杭体及びジョイントの変形例の外観図である。It is an external view of the modified example of the pile body and the joint of 1st Embodiment. 第2実施形態の杭体及びジョイントの外観図である。It is external drawing of the pile body and joint of 2nd Embodiment. 第3実施形態の圧入機を用いて杭体を埋設する場合の工程を示す図であり、(a)は下杭と簡易打ち下げ装置とを連結して圧入機がジョイント部分を把持している状態を示し、(b)は下杭と簡易打ち下げ装置とを連結して圧入機が下杭を埋設している状態を示し、(c)は下杭と上杭とを連結して圧入機が下杭をさらに埋設している状態を示す。It is a figure which shows the process in the case of embedding a pile body by using the press-fitting machine of 3rd Embodiment, (a) is connecting the lower pile and a simple down-down device, and the press-fitting machine grips a joint part. The state is shown, (b) shows the state where the lower pile and the simple downhill device are connected and the press-fitting machine is burying the lower pile, and (c) shows the state where the lower pile and the upper pile are connected and the press-fitting machine is used. Indicates that the lower pile is further buried. 第3実施形態の圧入機のチャックに備えられる段付爪の側面図である。It is a side view of the stepped claw provided in the chuck of the press-fitting machine of the third embodiment. 第4実施形態の圧入機を用いて杭体を埋設する場合の工程を示す図であり、(a)はサブチャックで下杭を把持しメインチャックで上杭を把持した状態を示し、(b)は上杭のジョイントに下杭のキーを挿入した状態を示し、(c)は上杭を回転させて下杭のキーを上杭のジョイントに嵌合させた状態を示し、(d)は下杭と上杭とを連結して圧入機が下杭をさらに埋設している状態を示す。It is a figure which shows the process in the case of embedding a pile body by using the press-fitting machine of 4th Embodiment, (a) shows the state which gripped the lower pile by the sub chuck and gripped the upper pile by the main chuck, (b). ) Indicates a state in which the key of the lower pile is inserted into the joint of the upper pile, (c) indicates a state in which the key of the lower pile is fitted to the joint of the upper pile by rotating the upper pile, and (d) indicates a state in which the key of the lower pile is fitted to the joint of the upper pile. The state where the lower pile and the upper pile are connected and the press-fitting machine further buryes the lower pile is shown. 第4実施形態の圧入機が備えるサブチャックの概略構成図である。It is a schematic block diagram of the sub chuck provided in the press-fitting machine of 4th Embodiment. 第4実施形態のストッパを示す図であり、(a)は補強部材及び逆転ストッパの外観図を示し、(b)はA矢視図を示し、(c)はキーが逆転ストッパを乗り越えて嵌合部と嵌合する側面図を示す。It is a figure which shows the stopper of 4th Embodiment, (a) shows the external view of the reinforcing member and the reversing stopper, (b) shows the view of arrow A, (c) is a key fit over a reversing stopper. The side view which fits with the joint part is shown.

以下、図面を参照して本発明の実施の形態を説明する。なお、以下に説明する実施の形態は、本発明を実施する場合の一例を示すものであって、本発明を以下に説明する具体的構成に限定するものではない。本発明の実施にあたっては、実施の形態に応じた具体的構成が適宜採用されてよい。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the embodiments described below show an example of the case where the present invention is carried out, and the present invention is not limited to the specific configuration described below. In carrying out the present invention, a specific configuration according to the embodiment may be appropriately adopted.

(第1実施形態)
図1は、本実施形態の杭体連結構造を構成するジョイント10及び杭体12,12の外観図である。図1(a)はジョイント10の横断面図、図1(b)はジョイント10の側面図、図1(c)は杭体12の横断面図、図1(d)は杭体12の側面図である。
(First Embodiment)
FIG. 1 is an external view of the joint 10 and the pile bodies 12 and 12 constituting the pile body connecting structure of the present embodiment. 1 (a) is a cross-sectional view of the joint 10, FIG. 1 (b) is a side view of the joint 10, FIG. 1 (c) is a cross-sectional view of the pile body 12, and FIG. 1 (d) is a side view of the pile body 12. It is a figure.

本実施形態の杭体12は、一例として、地中に埋設される杭であり、その外周面12Aに本発明の突部に相当するキー14が設けられる。キー14は杭体12の外周面12Aに4つ設けられるが、これは一例であり、キー14は杭体12の外周面12Aに一つ以上設けられれば良い。またキー14は平面状であり、一例として、4面を有する矩形状とされる。 As an example, the pile body 12 of the present embodiment is a pile buried in the ground, and a key 14 corresponding to a protrusion of the present invention is provided on the outer peripheral surface 12A thereof. Four keys 14 are provided on the outer peripheral surface 12A of the pile body 12, but this is an example, and one or more keys 14 may be provided on the outer peripheral surface 12A of the pile body 12. Further, the key 14 has a planar shape, and as an example, it has a rectangular shape having four surfaces.

ジョイント10は、2本の杭体12,12を連結し、本発明の杭体継手に相当する。ジョイント10は、各端部16A,16Aから杭体12が嵌め込まれる管状の本体部16を有し、本体部16は、杭体12の外周面12Aを覆うことが可能なように、その内周径が杭体12の外周径より若干大きく形成されている。 The joint 10 connects two pile bodies 12 and 12 and corresponds to the pile body joint of the present invention. The joint 10 has a tubular main body portion 16 into which the pile body 12 is fitted from each of the end portions 16A and 16A, and the main body portion 16 has an inner circumference thereof so as to be able to cover the outer peripheral surface 12A of the pile body 12. The diameter is formed to be slightly larger than the outer peripheral diameter of the pile body 12.

この本体部16には、杭体12のキー14と係合する係合部18が各端部16A,16Aに対応して形成される。すなわち、本実施形態のジョイント10は、杭体12を連結する方向(「上下方向」ともいう。)で対称構造となっている。なお、本実施形態の本体部16には、4つのキー14が設けられた杭体12に対応するように、上下方向に4つの係合部18が形成される。 An engaging portion 18 that engages with the key 14 of the pile body 12 is formed on the main body portion 16 corresponding to the end portions 16A and 16A. That is, the joint 10 of the present embodiment has a symmetrical structure in the direction in which the pile bodies 12 are connected (also referred to as "vertical direction"). The main body 16 of the present embodiment is formed with four engaging portions 18 in the vertical direction so as to correspond to the pile body 12 provided with the four keys 14.

係合部18は、本体部16の端部16Aからキー14が挿入される挿入部20と、杭体12を嵌め込んで回転させることでキー14に嵌合する嵌合部22と、で形成される。なお、挿入部20は杭体12の軸線方向と平行な方向に形成され、嵌合部22は、杭体12の軸線方向に交差する方向に形成される。このような構成により、本実施形態の係合部18はL字形状とされるが、これに限らず、挿入部20から挿入されたキー14を杭体12の軸線方向に交差する方向で嵌合する形状であればよく、例えば係合部18は逆T字形状等でもよい。 The engaging portion 18 is formed by an insertion portion 20 into which the key 14 is inserted from the end portion 16A of the main body portion 16 and a fitting portion 22 that fits into the key 14 by fitting and rotating the pile body 12. Will be done. The insertion portion 20 is formed in a direction parallel to the axial direction of the pile body 12, and the fitting portion 22 is formed in a direction intersecting the axial direction of the pile body 12. With such a configuration, the engaging portion 18 of the present embodiment has an L-shape, but the present invention is not limited to this, and the key 14 inserted from the insertion portion 20 is fitted in a direction intersecting the axial direction of the pile body 12. It may have a matching shape, for example, the engaging portion 18 may have an inverted T shape or the like.

図2は、キー14が設けられる2本の杭体12,12とジョイント10との連結方法を示す図である。ジョイント10は、本体部16の一方の端部16Aから一方の杭体12が嵌め込まれ、他方の端部16Aから他方の杭体12が嵌め込まれる(図2(a))。そして、杭体12を回転させることで杭体12に設けられたキー14がジョイント10の嵌合部22と嵌合して連結される(図2(b))。 FIG. 2 is a diagram showing a method of connecting the two pile bodies 12 and 12 provided with the key 14 and the joint 10. In the joint 10, one pile body 12 is fitted from one end portion 16A of the main body portion 16, and the other pile body 12 is fitted from the other end portion 16A (FIG. 2A). Then, by rotating the pile body 12, the key 14 provided on the pile body 12 is fitted and connected to the fitting portion 22 of the joint 10 (FIG. 2B).

なお、ジョイント10によって連結された2本の杭体12,12の端部12B,12Bは、互いに当接し合う。換言すると、杭体12に設けられるキー14とジョイント10の嵌合部22との位置関係は、2本の杭体12,12がジョイント10によって連結された場合に杭体12,12の端部12B,12B同士が当接する位置関係とされる。一例として、本実施形態では、ジョイント10の高さ方向に対して中央部分で杭体12,12の端部12B,12B同士が当接するように、嵌合部22の位置に合わせてキー14が杭体12に設けられる。 The ends 12B and 12B of the two piles 12 and 12 connected by the joint 10 come into contact with each other. In other words, the positional relationship between the key 14 provided on the pile body 12 and the fitting portion 22 of the joint 10 is the end portion of the pile bodies 12 and 12 when the two pile bodies 12 and 12 are connected by the joint 10. The positional relationship is such that 12B and 12B are in contact with each other. As an example, in the present embodiment, the key 14 is aligned with the position of the fitting portion 22 so that the end portions 12B, 12B of the pile bodies 12, 12 come into contact with each other at the central portion with respect to the height direction of the joint 10. It is provided on the pile body 12.

次に、本実施形態の図3及び図4を参照して、キー14及びジョイント10の形状の詳細について説明する。なお、図3は、キー14と嵌合部22とが嵌合した状態を示す拡大図である。図4は、杭体12におけるキー14が設けられた部分及びジョイント10における嵌合部22が形成された部分の縦断面図である。図4(a)は杭体12とジョイント10を個別に示した図であり、図4(b)は杭体12とジョイント10を連結した場合を示す図である。 Next, the details of the shapes of the key 14 and the joint 10 will be described with reference to FIGS. 3 and 4 of the present embodiment. Note that FIG. 3 is an enlarged view showing a state in which the key 14 and the fitting portion 22 are fitted. FIG. 4 is a vertical cross-sectional view of a portion of the pile body 12 where the key 14 is provided and a portion of the joint 10 where the fitting portion 22 is formed. FIG. 4A is a diagram showing the pile body 12 and the joint 10 individually, and FIG. 4B is a diagram showing a case where the pile body 12 and the joint 10 are connected.

図3に示されるように、嵌合部22は、杭体12の回転方向xで本体部16の端部16Aから離れるように傾斜する面22Aを有し、本発明の第1形状に相当するテーパ形状が形成されている。換言すると、嵌合部22の面22Aは、連結される2本の杭体12,12の連結方向に傾斜している。なお、面22Aに対向する面22Bは、本体部16の端部16Aと平行に形成される。 As shown in FIG. 3, the fitting portion 22 has a surface 22A that is inclined so as to be separated from the end portion 16A of the main body portion 16 in the rotation direction x of the pile body 12, and corresponds to the first shape of the present invention. A tapered shape is formed. In other words, the surface 22A of the fitting portion 22 is inclined in the connecting direction of the two pile bodies 12 and 12 to be connected. The surface 22B facing the surface 22A is formed in parallel with the end portion 16A of the main body portion 16.

キー14は、このような嵌合部22のテーパ形状に対応する形状とされる。具体的には、キー14は、杭体12の軸線方向に交差し、かつ対向する面14A,14Bを有する。面14Bは、杭体12の端部12B側に位置し、杭体12の端部12Bに平行に形成される。一方、面14Aは、杭体12の端部12Bへ近づく方向に傾斜して形成される。キー14の面14Aの傾斜角度は、嵌合部22の面22Aの傾斜角度と同じである。 The key 14 has a shape corresponding to the tapered shape of the fitting portion 22. Specifically, the key 14 has surfaces 14A and 14B that intersect and face each other in the axial direction of the pile body 12. The surface 14B is located on the end portion 12B side of the pile body 12 and is formed parallel to the end portion 12B of the pile body 12. On the other hand, the surface 14A is formed so as to be inclined in a direction approaching the end portion 12B of the pile body 12. The inclination angle of the surface 14A of the key 14 is the same as the inclination angle of the surface 22A of the fitting portion 22.

このように、嵌合部22には、傾斜する面22Aを有するテーパ形状が形成されている
ので、杭体12をジョイント10に嵌め込んで回転させると、杭体12は嵌め込まれた方向、換言するとジョイント10で連結される他方の杭体12の方向に進む。この結果、連結される2本の杭体12,12の端部12B,12B同士が当接し、かつ嵌合部22の傾斜した面22Aとこれに対向するキー14の面14Aも当接し、2本の杭体12とジョイント10とで締まり合う。このように嵌合部22に形成されたテーパ形状という簡易な構成により、連結される2本の杭体12,12とジョイント10とが強固に一体化される。
As described above, since the fitting portion 22 is formed with a tapered shape having an inclined surface 22A, when the pile body 12 is fitted into the joint 10 and rotated, the pile body 12 is fitted in the fitting direction, in other words. Then, it proceeds in the direction of the other pile body 12 connected by the joint 10. As a result, the ends 12B and 12B of the two pile bodies 12 and 12 to be connected are in contact with each other, and the inclined surface 22A of the fitting portion 22 and the surface 14A of the key 14 facing the same are also in contact with each other. The stake 12 of the book and the joint 10 are tightened together. Due to the simple structure of the tapered shape formed in the fitting portion 22 in this way, the two pile bodies 12 and 12 to be connected and the joint 10 are firmly integrated.

なお、上述のように、嵌合部22がテーパ形状とされたジョイント10によって締まり合い剛体となった杭体12,12は、嵌合部22の面22Bとキー14の面14Bとは当接せずに離間する。 As described above, the pile bodies 12 and 12 in which the fitting portion 22 is tightened by the tapered joint 10 to form a rigid body are in contact with the surface 22B of the fitting portion 22 and the surface 14B of the key 14. Separate without.

また、図4(a)に示されるように、嵌合部22には、キー14と杭体12との間に嵌入し、本発明の第2形状に相当するクサビ形状が形成される。このクサビ形状は、嵌合部22の面22Aを連結する杭体12の方向に面取りすることで形成される。このように、本実施形態の嵌合部22の面22Aには、テーパ形状と共にクサビ形状が形成される。 Further, as shown in FIG. 4A, the fitting portion 22 is fitted between the key 14 and the pile body 12 to form a wedge shape corresponding to the second shape of the present invention. This wedge shape is formed by chamfering in the direction of the pile body 12 connecting the surfaces 22A of the fitting portion 22. As described above, the surface 22A of the fitting portion 22 of the present embodiment is formed with a wedge shape as well as a tapered shape.

また、キー14の面14Aも嵌合部22の面22Aのクサビ形状に対応するように、杭体12の方向に傾斜するように形成される。すなわち、キー14の面14Aと杭体12の外周面12AとによってV字形状が形成され、このV字形状に嵌合部22の面22Aが嵌め合わされる。これにより、嵌合部22とキー14とに所謂クサビ効果を生じさせ、例えば、埋設している杭体12を引き抜く場合(図4(b)の矢印y1方向)に発生する可能性のある嵌合部22とキー14とのズレの発生を防止できる。このように嵌合部22に形成されたクサビ形状という簡易な構成により、杭体12とジョイント10とがより強固に一体化される。 Further, the surface 14A of the key 14 is also formed so as to be inclined in the direction of the pile body 12 so as to correspond to the wedge shape of the surface 22A of the fitting portion 22. That is, a V-shape is formed by the surface 14A of the key 14 and the outer peripheral surface 12A of the pile body 12, and the surface 22A of the fitting portion 22 is fitted into this V-shape. As a result, a so-called wedge effect is generated in the fitting portion 22 and the key 14, and for example, fitting that may occur when the buried pile body 12 is pulled out (in the direction of arrow y1 in FIG. 4B). It is possible to prevent the occurrence of misalignment between the joint portion 22 and the key 14. Due to the simple structure of the wedge shape formed in the fitting portion 22 in this way, the pile body 12 and the joint 10 are more firmly integrated.

また、キー14の外周を溶接してキー14を杭体12に設けると、ビード(溶接痕)がキー14の外周に生じ、ビードがキー14と嵌合部22との嵌合の障害となる可能性がある。このため、研磨等により、ビードを除去する工程が必要となる。そこで、本実施形態のキー14は、平面内側が中抜きされている(図1参照)。そして、中抜きされている平面内側を溶接することでビードがキー14の平面内側に形成されることになり、ビードがキー14と嵌合部22との嵌合の障害となることを防止できる。 Further, when the outer circumference of the key 14 is welded and the key 14 is provided on the pile body 12, beads (welding marks) are generated on the outer circumference of the key 14, and the beads interfere with the fitting between the key 14 and the fitting portion 22. there is a possibility. Therefore, a step of removing the beads by polishing or the like is required. Therefore, the inside of the plane of the key 14 of the present embodiment is hollowed out (see FIG. 1). Then, by welding the inside of the hollowed-out plane, the bead is formed inside the plane of the key 14, and it is possible to prevent the bead from becoming an obstacle to the fitting between the key 14 and the fitting portion 22. ..

本実施形態の中抜き形状24は、一例として、矩形状とされ、杭体12の周方向に沿ってキー14に3つ設けられる。なお、中抜き形状24は、キー14に一つ以上形成されていればよく、キー14を杭体12に設けるために溶接作業が可能なように形成されていれば、その形状及び大きさは限定されない。 As an example, the hollow shape 24 of the present embodiment has a rectangular shape, and three keys 14 are provided along the circumferential direction of the pile body 12. It is sufficient that one or more hollow shapes 24 are formed on the key 14, and if the key 14 is formed so that welding work can be performed to provide the key 14 on the pile body 12, the shape and size thereof may be changed. Not limited.

また、杭体12におけるキー14が設けられる箇所は、杭体12の横断面方向の強度が高くなる。そこで、本実施形態のキー14は、杭体12の外周方向に非等角度間隔で配置される。図1(c)に示されるキー14の配置の例では、対向するキー14が2組設けられ、計4つのキー14は、隣り合うキー14との間隔が120°と60°となるように配置されている。 Further, the strength of the pile body 12 in the cross-sectional direction is increased at the location where the key 14 is provided. Therefore, the keys 14 of the present embodiment are arranged at non-equal angles in the outer peripheral direction of the pile body 12. In the example of the arrangement of the keys 14 shown in FIG. 1 (c), two sets of opposite keys 14 are provided, and the total of four keys 14 are spaced 120 ° and 60 ° from the adjacent keys 14. Have been placed.

このような非等間隔による複数のキー14の配置によれば、杭体12に対して相対的に高い強度を与えたい横断面方向の位置にキー14を設けることで、連結した2本の杭体12,12の強度を簡易な構成で高めることができる。 According to the arrangement of the plurality of keys 14 at such non-equal intervals, the two piles connected by providing the keys 14 at the positions in the cross-sectional direction in which the relative high strength is desired to be given to the pile body 12. The strength of the bodies 12 and 12 can be increased by a simple configuration.

なお、キー14の配置位置は、非等間隔に限らず、外周方向に等角度間隔で配置されてもよい。この構成によれば、杭体12に設けられるキー14の位置を考慮して杭体12とジョイント10とを嵌め合わせる必要がないため、簡易に杭体12とジョイント10とを嵌め合わせることができる。 The positions of the keys 14 are not limited to non-equal intervals, and may be arranged at equal angular intervals in the outer peripheral direction. According to this configuration, it is not necessary to fit the pile body 12 and the joint 10 in consideration of the position of the key 14 provided on the pile body 12, so that the pile body 12 and the joint 10 can be easily fitted. ..

図5は、2本の杭体12,12を連結する際に2本の杭体12,12及びジョイント10の荷重伝達個所を示す図である。 FIG. 5 is a diagram showing load transmission points of the two pile bodies 12, 12 and the joint 10 when connecting the two pile bodies 12, 12.

図5(a)は、杭体12の圧入時(杭体12に対して下方向y2への圧入)の荷重伝達箇所を示す。杭体12に下向きの力が加えられるため、杭体12の圧入時には矢印Aで示すように、連結されている2本の杭体12,12が当接する端部12B,12Bが荷重伝達箇所となる。 FIG. 5A shows a load transmission location when the pile body 12 is press-fitted (press-fitted downward y2 with respect to the pile body 12). Since a downward force is applied to the pile body 12, when the pile body 12 is press-fitted, the ends 12B and 12B where the two connected pile bodies 12 and 12 abut are the load transmission points, as shown by the arrow A. Become.

図5(b)は、埋設されている杭体12の引き抜き時(杭体12に対して上方向y1への引き抜き)の荷重伝達箇所を示す。杭体12に上向きの力が加えられるため、杭体12の引き抜き時には矢印Bで示すように、嵌合部22とキー14のテーパ形状(クサビ形状)が荷重伝達箇所となる。 FIG. 5B shows a load transmission point when the buried pile body 12 is pulled out (pulled out upward y1 with respect to the pile body 12). Since an upward force is applied to the pile body 12, when the pile body 12 is pulled out, the tapered shape (wedge shape) of the fitting portion 22 and the key 14 becomes the load transmission point as shown by the arrow B.

図5(c)は、杭体12の回転時(杭体12に対して右方向xへの回転)の荷重伝達箇所(トルク伝達箇所)を示す。杭体12に右回転方向の力が加えられるため、杭体12の回転時には矢印Cで示すように、嵌合部22とキー14のテーパ形状の先端部が荷重伝達箇所となる。 FIG. 5C shows a load transmission point (torque transmission point) when the pile body 12 is rotated (rotation to the right x with respect to the pile body 12). Since a force in the clockwise rotation direction is applied to the pile body 12, when the pile body 12 is rotated, the tapered tip portions of the fitting portion 22 and the key 14 serve as load transmission points as shown by arrows C.

図6は、2本の杭体12,12を連結させて圧入機30を用いて埋設する場合の工程を示す図である。 FIG. 6 is a diagram showing a process in which two pile bodies 12 and 12 are connected and buried by using a press-fitting machine 30.

まず、圧入機30は、チャック32によって一方の杭体12aを把持して埋設する。次に圧入機30は、杭体12aと連結させる他の杭体12bをチャック32によって把持する。そして、チャック32に把持された状態で杭体12Bbのキー14をジョイント10の挿入部20に挿入することで、杭体12bにジョイント10を嵌め込み、ジョイント10を回転させてキー14と嵌合部22とを嵌合させる(図6(a))。そして、埋設された杭体12aに対してジョイント10が嵌合した杭体12bを立て、2本の杭体12a,12bがジョイント10によって連結するように他の杭体12bを回転させる(図6(c))。なお、埋設された杭体12aに杭体12bを立てるとは、杭体12aの軸線と杭体12bの軸線とが一致するように垂直に配置することである。 First, the press-fitting machine 30 grips and embeds one pile body 12a by the chuck 32. Next, the press-fitting machine 30 grips another pile body 12b to be connected to the pile body 12a by the chuck 32. Then, by inserting the key 14 of the pile body 12Bb into the insertion portion 20 of the joint 10 while being gripped by the chuck 32, the joint 10 is fitted into the pile body 12b, the joint 10 is rotated, and the key 14 and the fitting portion are fitted. 22 is fitted (FIG. 6 (a)). Then, a pile body 12b in which the joint 10 is fitted is erected with respect to the buried pile body 12a, and the other pile bodies 12b are rotated so that the two pile bodies 12a and 12b are connected by the joint 10 (FIG. 6). (C)). In addition, to erect the pile body 12b on the buried pile body 12a means to arrange the pile body 12a vertically so that the axis of the pile body 12a and the axis of the pile body 12b coincide with each other.

なお、これに限らず、埋設された杭体12aに対してジョイント10を嵌め込み(図6(b))、ジョイント10が嵌合した杭体12aに対して杭体12bを立て、2本の杭体12a,12bがジョイント10によって連結するように他の杭体12bを回転させてもよい(図6(c))。 Not limited to this, the joint 10 is fitted into the buried pile body 12a (FIG. 6B), and the pile body 12b is erected against the pile body 12a to which the joint 10 is fitted, and two piles are set up. The other pile bodies 12b may be rotated so that the bodies 12a and 12b are connected by the joint 10 (FIG. 6 (c)).

図7から図10は、ジョイント10に補強部材40を設けた形態を示す図である。 7 to 10 are views showing a form in which the reinforcing member 40 is provided on the joint 10.

ジョイント10は、図5に示されるように嵌合部22が荷重伝達部となるため、嵌合部22が形成された領域近辺の強度が他の領域に比べて相対的に低下する。そこで本実施形態の本体部16には、図7に示されるように、少なくとも嵌合部22を覆う補強部材40が設けられる。このような構成によれば、嵌合部22が形成されることで低下した強度を補強部材40によって高めることができ、荷重伝達時におけるジョイント10の変形を抑制できる。なお、本実施形態の補強部材40は嵌合部22だけでなく、挿入部20周辺を覆う。また、補強部材40は、予め本体部16に溶接等により接合されている。 As shown in FIG. 5, in the joint 10, since the fitting portion 22 serves as the load transmitting portion, the strength in the vicinity of the region where the fitting portion 22 is formed is relatively lower than that in the other regions. Therefore, as shown in FIG. 7, the main body 16 of the present embodiment is provided with a reinforcing member 40 that covers at least the fitting portion 22. According to such a configuration, the strength reduced by the formation of the fitting portion 22 can be increased by the reinforcing member 40, and the deformation of the joint 10 at the time of load transmission can be suppressed. The reinforcing member 40 of the present embodiment covers not only the fitting portion 22 but also the periphery of the insertion portion 20. Further, the reinforcing member 40 is previously joined to the main body 16 by welding or the like.

本実施形態の補強部材40には、キー14の挿入を確認するための孔42が形成される。補強部材40に形成される孔42Aは、一例として、挿入部20の位置(孔42A)と嵌合部22の位置(孔42B)に形成される。孔42Aは円形である。孔42Bはジョイント10の軸線方向に交差する方向に長面を有する長方形(各丸長方形)とされ、上下の嵌合部22に跨るように形成されている。このように、補強部材40に孔42が形成されることによって、補強部材40が設けられても挿入部20及び嵌合部22へのキー14の挿入状態を作業者が目視で確認できる。 The reinforcing member 40 of the present embodiment is formed with a hole 42 for confirming the insertion of the key 14. The holes 42A formed in the reinforcing member 40 are formed at the position of the insertion portion 20 (hole 42A) and the position of the fitting portion 22 (hole 42B) as an example. The hole 42A is circular. The hole 42B is a rectangle (each round rectangle) having a long surface in a direction intersecting the axial direction of the joint 10, and is formed so as to straddle the upper and lower fitting portions 22. By forming the hole 42 in the reinforcing member 40 in this way, the operator can visually confirm the insertion state of the key 14 into the insertion portion 20 and the fitting portion 22 even if the reinforcing member 40 is provided.

図8は、2本の杭体12,12と補強部材40が設けられたジョイント10との連結方法を示す図である。補強部材40が設けられた場合であっても、杭体12とジョイント10との連結方法は変わらず、ジョイント10が有する本体部16の端部16A毎に杭体12が嵌め込まれ(図8(a))、杭体12を回転させることでキー14と嵌合部22とを嵌合させて連結させる(図8(b))。 FIG. 8 is a diagram showing a method of connecting the two pile bodies 12 and 12 and the joint 10 provided with the reinforcing member 40. Even when the reinforcing member 40 is provided, the method of connecting the pile body 12 and the joint 10 does not change, and the pile body 12 is fitted at each end portion 16A of the main body portion 16 of the joint 10 (FIG. 8 (FIG. 8). a)) By rotating the pile body 12, the key 14 and the fitting portion 22 are fitted and connected (FIG. 8 (b)).

また、ジョイント10の嵌合部22に嵌め合わされたキー14は、杭体12を圧入する際に杭体12の回転方向が逆転すると嵌合部22から外れる可能性がある。そこで本実施形態のジョイント10には、図9に示すように、キー14が嵌合部22から外れることを防止し、本発明の外れ防止部材に相当する逆転ストッパ50Aが設けられてもよい。図9(a)は逆転ストッパ50Aの使用例を示した図であり、ジョイント10及び補強部材40を杭体12の外周方向に展開した図である。図9(b)は逆転ストッパ50Aの正面図、上面図、及び側面図である。図9(c)は逆転ストッパ50Aに形成されたピン52の作用を示した図である。 Further, the key 14 fitted to the fitting portion 22 of the joint 10 may come off from the fitting portion 22 if the rotation direction of the pile body 12 is reversed when the pile body 12 is press-fitted. Therefore, as shown in FIG. 9, the joint 10 of the present embodiment may be provided with a reversing stopper 50A corresponding to the disengagement prevention member of the present invention to prevent the key 14 from being disengaged from the fitting portion 22. FIG. 9A is a view showing a usage example of the reversing stopper 50A, and is a view in which the joint 10 and the reinforcing member 40 are expanded in the outer peripheral direction of the pile body 12. FIG. 9B is a front view, a top view, and a side view of the reversing stopper 50A. FIG. 9C is a diagram showing the action of the pin 52 formed on the reversing stopper 50A.

図9(a)に示すように逆転ストッパ50Aは、杭体12,12がジョイント10で連結された後に、挿入部20に挿入される。このため、逆転ストッパ50Aの横幅は、挿入部20の幅よりも若干狭く形成され、かつ杭体12の外周面12Aに沿うような形状とされている。 As shown in FIG. 9A, the reversing stopper 50A is inserted into the insertion portion 20 after the pile bodies 12 and 12 are connected by the joint 10. Therefore, the width of the reversing stopper 50A is formed to be slightly narrower than the width of the insertion portion 20, and is shaped so as to follow the outer peripheral surface 12A of the pile body 12.

また、本実施形態の逆転ストッパ50Aは、補強部材40の孔42Aに対応するようにピン52が形成され、このピン52の左右にはスリット54が形成されている。すなわち、逆転ストッパ50Aは、挿入部20に挿入される際に片持ちスプリングバックによってピン52が押され、スリット54とスリット54との間の領域が曲げられる。そして、ピン52が孔42Aに至るまで逆転ストッパ50Aが挿入されるとピン52は孔42Aに引っ掛かる。これにより、スリット54は挿入部20に固定され、嵌合部22からキー14が外れることを阻害するので、ジョイント10に嵌め込んだ杭体12がジョイント10から外れることを確実に防止できる。 Further, in the reversing stopper 50A of the present embodiment, pins 52 are formed so as to correspond to holes 42A of the reinforcing member 40, and slits 54 are formed on the left and right sides of the pins 52. That is, when the reverse stopper 50A is inserted into the insertion portion 20, the pin 52 is pushed by the cantilever springback, and the region between the slit 54 and the slit 54 is bent. Then, when the reversing stopper 50A is inserted until the pin 52 reaches the hole 42A, the pin 52 is caught in the hole 42A. As a result, the slit 54 is fixed to the insertion portion 20 and prevents the key 14 from coming off from the fitting portion 22, so that the pile body 12 fitted in the joint 10 can be reliably prevented from coming off from the joint 10.

図10は、本発明の外れ防止部材の他の形態に係る逆転ストッパ50Bを示した図である。図10(a)は逆転ストッパ50Bの使用例を示した図であり、ジョイント10及び補強部材40を杭体12の外周方向に展開した図である。図10(b)は逆転ストッパ50Bの正面図及び上面図である。逆転ストッパ50Bは、補強部材40の孔42Aに対応するように孔56が形成され、この孔56には雌ネジが形成されている。そして、逆転ストッパ50Bを挿入部20に挿入した後に補強部材40の孔42Aからボルトを挿入し、当該ボルトと逆転ストッパ50Bの孔56とを螺合する。これにより、このボルトによって補強部材40と逆転ストッパ50Bとが締結され、逆転ストッパ50Bは補強部材40に固定される。 FIG. 10 is a diagram showing a reversing stopper 50B according to another form of the detachment prevention member of the present invention. FIG. 10A is a view showing a usage example of the reversing stopper 50B, and is a view in which the joint 10 and the reinforcing member 40 are expanded in the outer peripheral direction of the pile body 12. FIG. 10B is a front view and a top view of the reversing stopper 50B. The reversing stopper 50B has a hole 56 formed so as to correspond to the hole 42A of the reinforcing member 40, and a female screw is formed in the hole 56. Then, after inserting the reversing stopper 50B into the insertion portion 20, a bolt is inserted from the hole 42A of the reinforcing member 40, and the bolt and the hole 56 of the reversing stopper 50B are screwed together. As a result, the reinforcing member 40 and the reversing stopper 50B are fastened by this bolt, and the reversing stopper 50B is fixed to the reinforcing member 40.

本実施形態では、キー14は杭体12の横方向に一列で設ける形態について説明したが、本実施形態はこれに限定されず、図11に示されるように杭体12の軸線方向に複数列が設けられてもよい。なお、ジョイント10には、複数列のキー14に対応するように複数列の嵌合部22が形成される。 In the present embodiment, the mode in which the keys 14 are provided in a single row in the lateral direction of the pile body 12 has been described, but the present embodiment is not limited to this, and as shown in FIG. 11, a plurality of rows in the axial direction of the pile body 12 May be provided. The joint 10 is formed with a plurality of rows of fitting portions 22 so as to correspond to the plurality of rows of keys 14.

また、本実施形態では、ジョイント10が杭体12に対して独立している形態について説明したが、本実施形態はこれに限られず、図12に示されるようにジョイント10が2本の杭体12の一方の端部に接合されてもよい。 Further, in the present embodiment, the embodiment in which the joint 10 is independent of the pile body 12 has been described, but the present embodiment is not limited to this, and as shown in FIG. 12, the pile body has two joints 10. It may be joined to one end of the twelve.

(第2実施形態)
図13は、本実施形態の杭体12及びジョイント10の外観図である。なお、図13における図1〜12と同一の構成部分については図1〜12等と同一の符号を付して、その説明を省略する。
(Second Embodiment)
FIG. 13 is an external view of the pile body 12 and the joint 10 of the present embodiment. The same components as those in FIGS. 1 to 12 in FIG. 13 are designated by the same reference numerals as those in FIGS. 1 to 12 and the like, and the description thereof will be omitted.

本実施形態のジョイント10に形成される嵌合部22は、杭体12の軸線方向に複数のテーパ形状及び複数のクサビ形状が形成される。より具体的には、一つの嵌合部22は、杭体12の軸線方向に平行な垂直部122Aと、垂直部122Aに対して直交する複数の水平部122Bで構成される。すなわち、各水平部122Bは、ジョイント10の端部16A側にテーパ形状及びクサビ形状が形成される。 The fitting portion 22 formed on the joint 10 of the present embodiment has a plurality of tapered shapes and a plurality of wedge shapes formed in the axial direction of the pile body 12. More specifically, one fitting portion 22 is composed of a vertical portion 122A parallel to the axial direction of the pile body 12 and a plurality of horizontal portions 122B orthogonal to the vertical portion 122A. That is, each horizontal portion 122B has a tapered shape and a wedge shape formed on the end portion 16A side of the joint 10.

また、垂直部122Aは、一例として、ジョイント10の端部16A側に水平部122Bのテーパ形状及びクサビ形状が延伸して形成される。なお、垂直部122Aのジョイント10の端部16A側の形状は、これに限らず、水平とされてもよい。 Further, the vertical portion 122A is formed by extending the tapered shape and the wedge shape of the horizontal portion 122B on the end portion 16A side of the joint 10 as an example. The shape of the vertical portion 122A on the end portion 16A side of the joint 10 is not limited to this, and may be horizontal.

また、本実施形態のキー14は、本実施形態の嵌合部22のテーパ形状及びクサビ形状に対応する形状とされる。このため、キー14は、杭体12の軸線方向に平行な垂直部114Aと、垂直部114Aに対して直交する3つの水平部114Bで構成される。 Further, the key 14 of the present embodiment has a shape corresponding to the tapered shape and the wedge shape of the fitting portion 22 of the present embodiment. Therefore, the key 14 is composed of a vertical portion 114A parallel to the axial direction of the pile body 12 and three horizontal portions 114B orthogonal to the vertical portion 114A.

このように、本実施形態のジョイント10は、テーパ形状及びクサビ形状が一つの嵌合部22に複数形成されるので、連結させる杭体12を強固に一体化できる。また、第1実施形態の図11を参照して説明したようなキー14を複数列並べる場合に比べ、上下にキー14を溶接する際の位置合わせが不要になり、作業工程を削減できる。すなわち、図11に示される構成でも、嵌合部22を縦方向に複数設置しているので、2本の杭体12をより強固に連結できるが、キー14をズレないよう縦方向に複数溶接するための工程を必要とする。しかしながら、本実施形態では、一つのキー14を溶接するだけで複数の嵌合部22にキー14を嵌合させることができる。 As described above, in the joint 10 of the present embodiment, since a plurality of tapered shapes and wedge shapes are formed in one fitting portion 22, the pile bodies 12 to be connected can be firmly integrated. Further, as compared with the case where a plurality of keys 14 are arranged in a row as described with reference to FIG. 11 of the first embodiment, the alignment when welding the keys 14 vertically becomes unnecessary, and the work process can be reduced. That is, even in the configuration shown in FIG. 11, since a plurality of fitting portions 22 are installed in the vertical direction, the two pile bodies 12 can be more firmly connected, but the keys 14 are welded in the vertical direction so as not to be displaced. Requires a process to do. However, in the present embodiment, the keys 14 can be fitted to the plurality of fitting portions 22 simply by welding one key 14.

なお、本実施形態では、一例として、一つの嵌合部22に3つの水平部122B(テーパ形状及びクサビ形状)が形成されるが、これに限らず、一つの嵌合部22に2つの水平部122Bが形成されてもよいし、一つの嵌合部22に4つ以上の水平部122Bが形成されてもよい。また、本実施形態のキー14は、嵌合部22の形状に応じた数の水平部114Bが形成される。 In the present embodiment, as an example, three horizontal portions 122B (tapered shape and wedge shape) are formed in one fitting portion 22, but the present invention is not limited to this, and two horizontal portions are formed in one fitting portion 22. The portion 122B may be formed, or four or more horizontal portions 122B may be formed in one fitting portion 22. Further, in the key 14 of the present embodiment, a number of horizontal portions 114B corresponding to the shape of the fitting portion 22 are formed.

(第3実施形態)
本実施形態は、ジョイント10で連結させる2本の杭体12の一方を地中に埋設する杭体12とし、他方の杭体12を一方の杭体12を埋設するために補助的に用いられる杭体(以下「簡易打ち下げ装置」という。)60(図14参照)とする。この簡易打ち下げ装置60は、地中に埋設する杭体12の上方に配置されるものの、簡易打ち下げ装置60自身は地中に埋設されない。
(Third Embodiment)
In this embodiment, one of the two piles 12 connected by the joint 10 is used as a pile 12 to be buried in the ground, and the other pile 12 is used as an auxiliary for burying one pile 12. It is a pile body (hereinafter referred to as "simple downhill device") 60 (see FIG. 14). Although the simple downhill device 60 is arranged above the pile body 12 to be buried in the ground, the simple downhill device 60 itself is not buried in the ground.

簡易打ち下げ装置60は、杭体12と同じ外形を有する円管を本体部60Aとし、本体部60Aの少なくとも一方の端部にジョイント10を備える。このジョイント10の嵌合部22は、本体部60Aの周方向に形成されている。なお、本体部60Aの全長は、地中に埋設される杭体12よりも、後述する圧入機30のチャック32で把持可能な長さであればよい。 The simple downhill device 60 has a circular pipe having the same outer shape as the pile body 12 as a main body portion 60A, and is provided with a joint 10 at at least one end of the main body portion 60A. The fitting portion 22 of the joint 10 is formed in the circumferential direction of the main body portion 60A. The total length of the main body 60A may be longer than the pile 12 buried in the ground so that it can be gripped by the chuck 32 of the press-fitting machine 30, which will be described later.

図14は、簡易打ち下げ装置60と杭体12とを連結させて圧入機30を用いて杭体12を埋設する場合の工程を示す図である。なお、図14における図1〜13と同一の構成部分については図1〜13等と同一の符号を付して、その説明を省略する。 FIG. 14 is a diagram showing a process in which the simple downhill device 60 and the pile body 12 are connected and the pile body 12 is buried by using the press-fitting machine 30. The same components as those in FIGS. 1 to 13 in FIG. 14 are designated by the same reference numerals as those in FIGS. 1 to 13 and the like, and the description thereof will be omitted.

また、図14に示される嵌合部22の形状は、図13における嵌合部22の形状と同様であるが、これは一例であり、図1や図11に示される他の嵌合部22の形状と同様でもよい。なお、以下の説明では、簡易打ち下げ装置60を用いて地中に埋設される杭体12を下杭12cといい、下杭12cと連結される杭体12を上杭12dともいう。 Further, the shape of the fitting portion 22 shown in FIG. 14 is the same as the shape of the fitting portion 22 in FIG. 13, but this is an example, and the other fitting portion 22 shown in FIGS. 1 and 11 is used. It may be the same as the shape of. In the following description, the pile body 12 buried in the ground using the simple downhill device 60 is referred to as a lower pile 12c, and the pile body 12 connected to the lower pile 12c is also referred to as an upper pile 12d.

図14(a)は下杭12cと簡易打ち下げ装置60とがジョイント10によって連結され、圧入機30がジョイント10を含む領域を把持している状態を示す。なお、下杭12cと簡易打ち下げ装置60とは、ジョイント10によって連結されたのちに、チャック32に把持される。 FIG. 14A shows a state in which the lower pile 12c and the simple downhill device 60 are connected by a joint 10 and the press-fitting machine 30 grips the area including the joint 10. The lower pile 12c and the simple downhill device 60 are connected by a joint 10 and then gripped by the chuck 32.

図15は、圧入機30が備えるチャック32が備える爪(以下「段付き爪」という。)70の概略側面図である。チャック32は、その内周に複数設けられる段付き爪70により杭体12を外周側から押圧することにより杭体12を把持して回転する。 FIG. 15 is a schematic side view of a claw (hereinafter referred to as “stepped claw”) 70 included in the chuck 32 included in the press-fitting machine 30. The chuck 32 grips and rotates the pile body 12 by pressing the pile body 12 from the outer peripheral side with a plurality of stepped claws 70 provided on the inner circumference thereof.

段付き爪70は、杭体12を押圧する押圧部72に段付き形状74が形成される。この段付き形状74の垂直長さyは、簡易打ち下げ装置60のジョイント10の垂直長さよりに比べて同等若しくは若干長く形成される。また、段付き形状74の水平深さxは、ジョイント10の厚みに比べて同等若しくは若干深く形成される。このように、押圧部72には、ジョイント10で連結される杭体12等をチャック32が把持する場合に、ジョイント10が嵌め合わされる段差が形成される。そして、段付き爪70は、段付き形状74の下側が下杭12cに当接し、段付き形状74の上側が簡易打ち下げ装置60の本体部60Aに当接する。 The stepped claw 70 has a stepped shape 74 formed on a pressing portion 72 that presses the pile body 12. The vertical length y of the stepped shape 74 is formed to be equal to or slightly longer than the vertical length of the joint 10 of the simple downhill device 60. Further, the horizontal depth x of the stepped shape 74 is formed to be equal to or slightly deeper than the thickness of the joint 10. In this way, the pressing portion 72 is formed with a step to which the joint 10 is fitted when the chuck 32 grips the pile body 12 or the like connected by the joint 10. Then, in the stepped claw 70, the lower side of the stepped shape 74 comes into contact with the lower pile 12c, and the upper side of the stepped shape 74 comes into contact with the main body 60A of the simple downhill device 60.

すなわち、段付き爪70は、杭体12の外周部からのジョイント10の飛び出し部分と干渉することなく杭体12を把持できるので、広い範囲で杭体12を把持することが可能となる。 That is, since the stepped claw 70 can grip the pile body 12 without interfering with the protruding portion of the joint 10 from the outer peripheral portion of the pile body 12, it is possible to grip the pile body 12 in a wide range.

図14(b)は下杭12cと簡易打ち下げ装置60とが連結し、圧入機30が下杭12cを埋設している状態を示す。図14(b)に示されるように、下杭12cの埋設が進行すると、チャック32は、簡易打ち下げ装置60の本体部60Aを把持する。 FIG. 14B shows a state in which the lower pile 12c and the simple downhill device 60 are connected and the press-fitting machine 30 is burying the lower pile 12c. As shown in FIG. 14B, as the burying of the lower pile 12c progresses, the chuck 32 grips the main body 60A of the simple downhill device 60.

この後、簡易打ち下げ装置60は、下杭12cから取り外される。そして、埋設された下杭12cに上杭12dが連結される。なお、本実施形態の上杭12dの端部12Bには、ジョイント10が接合されており、このジョイント10によって下杭12cと上杭12dが連結される。 After that, the simple downhill device 60 is removed from the lower pile 12c. Then, the upper pile 12d is connected to the buried lower pile 12c. A joint 10 is joined to the end portion 12B of the upper pile 12d of the present embodiment, and the lower pile 12c and the upper pile 12d are connected by this joint 10.

図14(c)は下杭12cと上杭12dとを連結し、圧入機30が下杭12cをさらに埋設している状態を示す。図14(c)に示されるように、圧入機30は、上杭12dをチャック32で把持しながら、下杭12c及び上杭12dの地中への埋設を行う。 FIG. 14C shows a state in which the lower pile 12c and the upper pile 12d are connected and the press-fitting machine 30 further buryes the lower pile 12c. As shown in FIG. 14C, the press-fitting machine 30 embeds the lower pile 12c and the upper pile 12d in the ground while gripping the upper pile 12d with the chuck 32.

このような簡易打ち下げ装置60を用いた下杭12cの埋設方法は、吊り下げ装置を用いることなく、杭体12を埋設することができる。例えば、下杭12cと上杭12dとをジョイント10で連結して埋設する場合には、その全長が長くなるために、吊り下げ装置を用いて連結した下杭12cと上杭12dとを吊り下げ装置を用いて吊り下げる必要があった。しかしながら、ジョイント10によって下杭12cと連結可能な簡易打ち下げ装置60を用いることで、圧入機30は、吊り下げ装置を用いることなく、簡易に杭体12を地中に埋設することができる。 In the method of burying the lower pile 12c using such a simple downhill device 60, the pile body 12 can be buried without using the hanging device. For example, when the lower pile 12c and the upper pile 12d are connected by a joint 10 and buried, the lower pile 12c and the upper pile 12d connected by using a hanging device are suspended in order to increase the total length. It had to be hung using a device. However, by using the simple downhill device 60 that can be connected to the lower pile 12c by the joint 10, the press-fitting machine 30 can easily bury the pile body 12 in the ground without using the hanging device.

なお、本実施形態では、簡易打ち下げ装置60がジョイント10を備える形態について説明したが、これに限らず、簡易打ち下げ装置60にジョイント10が備えられずに、簡易打ち下げ装置60の外周にキー14が備えられてもよい。すなわち、簡易打ち下げ装置60と下杭12cとは別体とされたジョイント10によって連結されてもよい。この形態の場合、下杭12cと連結される上杭12dの外周にはキー14が備えられ、下杭12c上杭12dとは別体とされたジョイント10によって連結される。 In the present embodiment, the mode in which the simple down-down device 60 includes the joint 10 has been described, but the present invention is not limited to this, and the simple down-down device 60 is not provided with the joint 10 and is located on the outer periphery of the simple down-down device 60. A key 14 may be provided. That is, the simple downhill device 60 and the lower pile 12c may be connected by a separate joint 10. In the case of this form, a key 14 is provided on the outer periphery of the upper pile 12d connected to the lower pile 12c, and is connected by a joint 10 separate from the lower pile 12c upper pile 12d.

また、簡易打ち下げ装置60は用いられることなく、ジョイント10が予め接合された杭体12(上杭12d)が下杭12cと連結され、チャック32に段付き爪70を備えた圧入機30が下杭12cと上杭12dとを埋設してもよい。 Further, without using the simple down-down device 60, the pile body 12 (upper pile 12d) to which the joint 10 is joined in advance is connected to the lower pile 12c, and the press-fitting machine 30 having the stepped claw 70 on the chuck 32 The lower pile 12c and the upper pile 12d may be buried.

(第4実施形態)
本実施形態の圧入機30は、図16に示されるように、杭体12を把持するチャック32として、メインチャック32Aとサブチャック32Bとを備える。なお、図16は、本実施形態の圧入機30を用いて杭体12を埋設する場合の工程を示す図である。また、本実施形態では上杭12dにジョイント10が予め接合され、ジョイント10に嵌合されるキー14が下杭12cに接合されている。
(Fourth Embodiment)
As shown in FIG. 16, the press-fitting machine 30 of the present embodiment includes a main chuck 32A and a sub chuck 32B as chucks 32 for gripping the pile body 12. Note that FIG. 16 is a diagram showing a process in which the pile body 12 is embedded by using the press-fitting machine 30 of the present embodiment. Further, in the present embodiment, the joint 10 is joined to the upper pile 12d in advance, and the key 14 fitted to the joint 10 is joined to the lower pile 12c.

メインチャック32A及びサブチャック32Bは共に、杭体12を着脱可能に把持するものである。メインチャック32Aは、マスト33に対して相対的に上下移動可能に支持される。サブチャック32Bは、メインチャック32Aの移動範囲に対して下方向に外れた位置に備えられる。 Both the main chuck 32A and the sub chuck 32B grip the pile body 12 in a detachable manner. The main chuck 32A is supported so as to be vertically movable relative to the mast 33. The sub chuck 32B is provided at a position deviating downward with respect to the moving range of the main chuck 32A.

サブチャック32Bは、図16(a)に示されるように、マスト33に設けられる一対のマストアーム部33Aの先端から下方に向けて延びるガイド33Bの下端に固定され、この下端から圧入機30の前方に向けて突出している。サブチャック32Bは、メインチャック32Aの下方に間隔をあけた位置で、メインチャック32Aと同軸となる位置に配置されている。このような構成により、本実施形態の圧入機30は、メインチャック32Aが杭体12を把持した状態で上下方向へ移動するものの、サブチャック32Bは上下方向へは移動しない。 As shown in FIG. 16A, the sub chuck 32B is fixed to the lower end of the guide 33B extending downward from the tip of the pair of mast arm portions 33A provided on the mast 33, and the press-fitting machine 30 is fixed from the lower end. It protrudes forward. The sub chuck 32B is arranged at a position coaxial with the main chuck 32A at a position spaced below the main chuck 32A. With such a configuration, the press-fitting machine 30 of the present embodiment moves in the vertical direction with the main chuck 32A holding the pile body 12, but the sub chuck 32B does not move in the vertical direction.

図17は、本実施形態の圧入機30が備えるサブチャック32Bの概略構成図である。 FIG. 17 is a schematic configuration diagram of a sub chuck 32B included in the press-fitting machine 30 of the present embodiment.

サブチャック32Bは、図17に示すように、サブチャック32Bに対して杭体12が挿通される挿通孔80の内周に沿うようにしてサブチャック32Bに固定され、メインチャック32Aよりも下方の位置で杭体12を外周側から把持する。サブチャック32Bは、一例として、挿通孔80の中心方向に伸長可能な複数の保持部82をサブチャックフレーム83の内周に備える。保持部82は、挿通孔80の周方向に複数(図17の例では4つ)が設けられ、杭体12を外周側から押圧することにより把持する。このような構成により保持部82は、杭体12の外径にかかわらず、杭体12を把持することが可能となる。 As shown in FIG. 17, the sub-chuck 32B is fixed to the sub-chuck 32B along the inner circumference of the insertion hole 80 through which the pile body 12 is inserted into the sub-chuck 32B, and is below the main chuck 32A. The pile body 12 is gripped from the outer peripheral side at the position. As an example, the sub-chuck 32B includes a plurality of holding portions 82 that can extend in the central direction of the insertion hole 80 on the inner circumference of the sub-chuck frame 83. A plurality of holding portions 82 (four in the example of FIG. 17) are provided in the circumferential direction of the insertion holes 80, and the pile body 12 is gripped by pressing from the outer peripheral side. With such a configuration, the holding portion 82 can grip the pile body 12 regardless of the outer diameter of the pile body 12.

なお、図17に示されるサブチャック32Bの構成は、一例であり、杭体12を把持できれば他の構成でもよい。例えば、サブチャック32Bは、周方向に複数(例えば3分割)に分割された円弧状のリングバンドと、周方向に隣り合うリングバンドの端部同士を連結して各リングバンドを径方向に移動させるためのチャックシリンダとで構成されてもよい。このような構成では、周方向に沿って配置される3つのリングバンドが環状を形成するように設けられ、その内周側に杭体12を挿通させ、リングバンドを径方向に移動させることで杭体12を把持する。 The configuration of the sub chuck 32B shown in FIG. 17 is an example, and other configurations may be used as long as the pile body 12 can be gripped. For example, the sub chuck 32B moves each ring band in the radial direction by connecting the arcuate ring bands divided into a plurality of (for example, divided into three) in the circumferential direction and the ends of the ring bands adjacent to each other in the circumferential direction. It may be composed of a chuck cylinder for making the ring. In such a configuration, three ring bands arranged along the circumferential direction are provided so as to form an annular shape, and the pile body 12 is inserted through the inner peripheral side thereof, and the ring bands are moved in the radial direction. The pile body 12 is gripped.

ここで、既に一部が地中に埋設されている下杭12cと上杭12dとを圧入機30を用い、ジョイント10を介して連結する場合、下杭12cに対して一定以上の支持力や周面摩擦抵抗力が作用している必要がある。下杭12cに十分な支持力が作用していないと、圧入機30が把持した上杭12dを下方向に移動させてキー14をジョイント10の挿入部20に挿入しようとしても、上杭12dの下方向への移動に伴い下杭12cも下がり、連結させることができない。また、下杭12cに十分な周面摩擦抵抗力が作用していないと、上杭12dを回転させて下杭12cのキー14をジョイント10の嵌合部22に嵌め合わせようとしても、上杭12dの回転に伴い下杭12cも回転し、連結させることができない。 Here, when the lower pile 12c and the upper pile 12d, which are already partially buried in the ground, are connected via the joint 10 by using the press-fitting machine 30, the bearing capacity of the lower pile 12c or more is increased. The peripheral frictional resistance must be acting. If sufficient bearing capacity is not acting on the lower pile 12c, even if the upper pile 12d gripped by the press-fitting machine 30 is moved downward to insert the key 14 into the insertion portion 20 of the joint 10, the upper pile 12d As the lower pile moves downward, the lower pile 12c also lowers and cannot be connected. Further, if a sufficient peripheral frictional resistance force does not act on the lower pile 12c, even if the upper pile 12d is rotated to fit the key 14 of the lower pile 12c to the fitting portion 22 of the joint 10, the upper pile 12c is fitted. The lower pile 12c also rotates with the rotation of 12d and cannot be connected.

さらに、下杭12cに一定以上の支持力や周面摩擦抵抗力が作用していないと、一見、ジョイント10によって下杭12cと上杭12dとが連結されているように見えても、その連結が確実なものでなく、地中への圧入の途中で連結が外れたり、ジョイント10によって連結することで本来生じ得る曲げ強度が生じない可能性がある。 Further, if the lower pile 12c is not subjected to a certain level of bearing capacity or peripheral frictional resistance, even if it seems that the lower pile 12c and the upper pile 12d are connected by the joint 10, the connection is made. Is not certain, and there is a possibility that the connection will be disconnected during the press-fitting into the ground, or the bending strength that can be originally generated by connecting with the joint 10 will not be generated.

そこで、本実施形態の埋設方法は、サブチャック32Bによって下杭12cを把持することで、圧入機30を用いて下杭12cと上杭12dとをジョイント10を介して連結する。 Therefore, in the burying method of the present embodiment, the lower pile 12c is gripped by the sub chuck 32B, and the lower pile 12c and the upper pile 12d are connected via the joint 10 by using the press-fitting machine 30.

以下、図16を参照して、本実施形態の埋設方法を説明する。なお、図16における矢印の方向は、杭体12に作用する力の方向を示している。 Hereinafter, the burying method of the present embodiment will be described with reference to FIG. The direction of the arrow in FIG. 16 indicates the direction of the force acting on the pile body 12.

図16(a)はサブチャック32Bで下杭を把持しメインチャック32Aで上杭を把持した状態を示す。なお、本実施形態のメインチャック32Aは第3実施形態で説明したような段付き爪70を備えているが、メインチャック32Aがジョイント10も把持しない場合には、段付き爪70が用いられなくてもよい。 FIG. 16A shows a state in which the lower pile is gripped by the sub chuck 32B and the upper pile is gripped by the main chuck 32A. The main chuck 32A of the present embodiment includes the stepped claw 70 as described in the third embodiment, but when the main chuck 32A does not grip the joint 10, the stepped claw 70 is not used. You may.

図16(b)は、メインチャック32Aを下方向に移動させることで、上杭12dのジョイント10に下杭12cのキー14を挿入した状態を示す。図16(c)は、上杭12dを回転させて下杭12cのキーを上杭12dのジョイント10に嵌合させた状態を示す。図16(b),(c)において、サブチャック32Bは十分な力により下杭12cを把持しているので、ジョイント10を介した下杭12cと上杭12dとの連結に必要な荷重とトルクをかけられるので、確実にキー14とジョイント10とを嵌合できる。 FIG. 16B shows a state in which the key 14 of the lower pile 12c is inserted into the joint 10 of the upper pile 12d by moving the main chuck 32A downward. FIG. 16C shows a state in which the upper pile 12d is rotated and the key of the lower pile 12c is fitted to the joint 10 of the upper pile 12d. In FIGS. 16B and 16C, since the sub-chuck 32B grips the lower pile 12c with sufficient force, the load and torque required for connecting the lower pile 12c and the upper pile 12d via the joint 10 Therefore, the key 14 and the joint 10 can be securely fitted.

図16(d)は、下杭12cと上杭12dとを連結して圧入機30が下杭12cをさらに埋設(圧入)している状態を示す。圧入機30は、メインチャック32Aを下方向へ移動させることで、ジョイント10によって連結された下杭12cと上杭12dとを圧入する。このとき、サブチャック32Bは、下杭12cを把持せずに、すなわち下杭12cに対して力を作用させない。 FIG. 16D shows a state in which the lower pile 12c and the upper pile 12d are connected and the press-fitting machine 30 further buries (press-fits) the lower pile 12c. The press-fitting machine 30 press-fits the lower pile 12c and the upper pile 12d connected by the joint 10 by moving the main chuck 32A downward. At this time, the sub chuck 32B does not grip the lower pile 12c, that is, does not apply a force to the lower pile 12c.

以上説明したように、本実施形態の埋設方法は、メインチャック32Aで上杭12dを把持し、サブチャック32Bで下杭12cを把持しながら、メインチャック32Aを下げて回転させることで、上杭12dと埋設された下杭12cとをジョイント10で連結する。これにより、本実施形態の埋設方法は、2本の杭体12の連結をより確実に行うことができる。 As described above, in the burying method of the present embodiment, the upper pile 12d is gripped by the main chuck 32A, the lower pile 12c is gripped by the sub chuck 32B, and the main chuck 32A is lowered and rotated to rotate the upper pile. The 12d and the buried lower pile 12c are connected by a joint 10. As a result, the burial method of the present embodiment can more reliably connect the two pile bodies 12.

なお、本実施形態では、上杭12dがジョイント10を備える形態について説明したが、これに限らず、上杭12dにジョイント10が備えられずに、上杭12dの外周にキー14が備えられてもよい。すなわち、上杭12dと下杭12cとは別体とされたジョイント10によって連結されてもよい。 In the present embodiment, the embodiment in which the upper pile 12d is provided with the joint 10 has been described, but the present invention is not limited to this, and the upper pile 12d is not provided with the joint 10 and the key 14 is provided on the outer periphery of the upper pile 12d. May be good. That is, the upper pile 12d and the lower pile 12c may be connected by a separate joint 10.

また、本実施形態は、下杭12cを圧入機30が備えるサブチャック32Bによって把持する第1工程と、上杭12dを圧入機30が備えるメインチャック32Aによって把持する第2工程と、上杭12dと下杭12cとの端部12B,12Bが当接するようにメインチャック32Aを移動させ、メインチャック32A又はサブチャック32Bを回転させることで、上杭12dと下杭12cとをジョイント10で連結する第3工程と、を行えばよく、下杭12cを地中に埋設する前に、上杭12dと下杭12cとをジョイント10によって連結させてもよい。 Further, in the present embodiment, the first step of gripping the lower pile 12c by the sub-chuck 32B included in the press-fitting machine 30, the second step of gripping the upper pile 12d by the main chuck 32A provided in the press-fitting machine 30, and the upper pile 12d By moving the main chuck 32A so that the ends 12B and 12B of the lower pile 12c come into contact with each other and rotating the main chuck 32A or the sub chuck 32B, the upper pile 12d and the lower pile 12c are connected by the joint 10. The third step may be performed, and the upper pile 12d and the lower pile 12c may be connected by a joint 10 before the lower pile 12c is buried in the ground.

図18は、本実施形態の補強部材40及び逆転ストッパ50Cの構成図である。図18(a)は外観図(ジョイント10及び補強部材40を杭体12の外周方向に展開した図)であり、図18(b)は図18(a)におけるA矢視図を示し、図18(c)はキー14が逆転ストッパ50Cを乗り越えて嵌合部22と嵌合する側面図を示す。 FIG. 18 is a configuration diagram of the reinforcing member 40 and the reversing stopper 50C of the present embodiment. FIG. 18 (a) is an external view (a view in which the joint 10 and the reinforcing member 40 are developed in the outer peripheral direction of the pile body 12), and FIG. 18 (b) shows a view taken along the arrow A in FIG. 18 (a). 18 (c) shows a side view in which the key 14 gets over the reverse stopper 50C and is fitted with the fitting portion 22.

ここで、第1実施形態における図9,10を参照して説明した逆転ストッパ50A,50Bは、補強部材40が設けられたジョイント10で2本の杭体12が連結された後に、ジョイント10の挿入部20に挿入されるものである。 Here, the reversing stoppers 50A and 50B described with reference to FIGS. 9 and 10 in the first embodiment are the joints 10 after the two piles 12 are connected by the joint 10 provided with the reinforcing member 40. It is inserted into the insertion portion 20.

一方、本実施形態の逆転ストッパ50Cは、図18(b)に示されるように補強部材40の内周面(杭体12Cと接する面)に予め接合されている。この逆転ストッパ50Cは、ジョイント10の嵌合部22手前に接合されている。すなわち、挿入部20に挿入されたキー14は、図18(c)に示されるように、逆転ストッパ50Cを乗り越えて嵌合部22に嵌合され、逆転ストッパ50Cによって嵌合部22から外れることが防止(以下「ロック」ともいう。)される。 On the other hand, the reversing stopper 50C of the present embodiment is previously joined to the inner peripheral surface (the surface in contact with the pile body 12C) of the reinforcing member 40 as shown in FIG. 18B. The reversing stopper 50C is joined in front of the fitting portion 22 of the joint 10. That is, as shown in FIG. 18C, the key 14 inserted into the insertion portion 20 gets over the reverse rotation stopper 50C and is fitted into the fitting portion 22, and is detached from the fitting portion 22 by the reverse rotation stopper 50C. Is prevented (hereinafter also referred to as "lock").

本実施形態の逆転ストッパ50Cは、一例として、プレート状であり、キー14が逆転ストッパ50Cを乗り超えてジョイント10と嵌合できるように、嵌合部22側とは逆側の面にテーパ―状の斜面90Aが形成される。一方、逆転ストッパ50Cの嵌合部22側の面はキー14が嵌合部22から外れないように、補強部材40の内周面に直交する直交面90Bとされる。また、逆転ストッパ50Cの斜面90Aと当接するキー14の面にもテーパ―状の斜面14Aが形成されることで、キー14は逆転ストッパ50Cを乗り越え易くなる。 As an example, the reversing stopper 50C of the present embodiment has a plate shape, and is tapered on the surface opposite to the fitting portion 22 side so that the key 14 can get over the reversing stopper 50C and be fitted with the joint 10. A shaped slope 90A is formed. On the other hand, the surface of the reversing stopper 50C on the fitting portion 22 side is an orthogonal surface 90B orthogonal to the inner peripheral surface of the reinforcing member 40 so that the key 14 does not come off from the fitting portion 22. Further, since the tapered slope 14A is also formed on the surface of the key 14 that comes into contact with the slope 90A of the reverse stopper 50C, the key 14 can easily get over the reverse stopper 50C.

なお、逆転ストッパ50Cは、嵌合部22毎に設けられる必要は必ずしもなく、ジョイント10に形成された複数の嵌合部22に対して少なくとも一つ接合されればよい。図18の例では、4つの嵌合部22に対して2つの逆転ストッパ50Cが接合されている。 The reversing stopper 50C does not necessarily have to be provided for each fitting portion 22, and at least one may be joined to the plurality of fitting portions 22 formed in the joint 10. In the example of FIG. 18, two reversing stoppers 50C are joined to the four fitting portions 22.

このような逆転ストッパ50Cであれば、ジョイント10と嵌合したキー14が外れることを簡易な構造で防止できる。より具体的には、本実施形態の構成であれば、図9,10に示される構成よりも簡易であるためコストが少なくすむ。また、本実施形態の構成であれば、キー14をジョイント10に嵌合させるために杭体12を回転させる工程によりキー14がジョイント10にロックされるので、キー14をロックするための作業工程を別途必要としない。 With such a reverse stopper 50C, it is possible to prevent the key 14 fitted to the joint 10 from coming off with a simple structure. More specifically, the configuration of the present embodiment is simpler than the configurations shown in FIGS. 9 and 10, so that the cost can be reduced. Further, in the configuration of the present embodiment, the key 14 is locked to the joint 10 by the step of rotating the pile body 12 in order to fit the key 14 to the joint 10, so that the work step for locking the key 14 is performed. Is not required separately.

以上、本発明を、上記実施形態を用いて説明したが、本発明の技術的範囲は上記実施形態に記載の範囲には限定されない。発明の要旨を逸脱しない範囲で上記実施形態に多様な変更または改良を加えることができ、該変更または改良を加えた形態も本発明の技術的範囲に含まれる。 Although the present invention has been described above using the above-described embodiment, the technical scope of the present invention is not limited to the scope described in the above-described embodiment. Various changes or improvements can be made to the above embodiments without departing from the gist of the invention, and the modified or improved forms are also included in the technical scope of the present invention.

上記実施形態では、嵌合部22にテーパ形状とクサビ形状とが形成される形態について説明したが、本発明はこれに限定されず、嵌合部22にテーパ形状のみ形成されてもよいし、嵌合部22にクサビ形状のみ形成されてもよい。すなわち、嵌合部22は、少なくともテーパ形状又はクサビ形状が形成されていればよい。 In the above embodiment, the form in which the tapered shape and the wedge shape are formed in the fitting portion 22 has been described, but the present invention is not limited to this, and only the tapered shape may be formed in the fitting portion 22. Only the wedge shape may be formed on the fitting portion 22. That is, the fitting portion 22 may have at least a tapered shape or a wedge shape.

また、上記実施形態では、ジョイント10の本体部16が杭体12の外周面12Aを覆う形態について説明したが、本発明はこれに限定されず、ジョイント10の本体部16が杭体12の内周面に沿うように形成されてもよい。この形態の場合、キー14は杭体12の内周面に設けられる。 Further, in the above embodiment, the embodiment in which the main body portion 16 of the joint 10 covers the outer peripheral surface 12A of the pile body 12 has been described, but the present invention is not limited to this, and the main body portion 16 of the joint 10 is inside the pile body 12. It may be formed along the peripheral surface. In this form, the key 14 is provided on the inner peripheral surface of the pile body 12.

10 ジョイント(杭体継手)
12 杭体
14 キー(突部)
16 本体部
22 嵌合部
40 補強部材
50A 逆転ストッパ(外れ防止部材)
50B 逆転ストッパ(外れ防止部材)
50C 逆転ストッパ(外れ防止部材)
10 joints (pile joints)
12 Pile body 14 key (protrusion)
16 Main body 22 Fitting part 40 Reinforcing member 50A Reverse stopper (disengagement prevention member)
50B reversing stopper (disengagement prevention member)
50C reversing stopper (disengagement prevention member)

Claims (12)

2本の杭体を連結する杭体継手であって、
突部が周面に設けられた前記杭体が端部から嵌め込まれる管状の本体部と、
前記杭体を嵌め込んで回転させることで前記突部に嵌合するように、前記本体部に形成される嵌合部と、
を備え、
前記嵌合部は、前記杭体の回転方向で前記本体部の前記端部から離れるように傾斜する面を有する第1形状、及び、前記突部と前記杭体との間に嵌入する第2形状が形成され
前記第2形状は、前記杭体の長軸方向に交差する方向に形成される、
杭体継手。
A pile joint that connects two piles.
A tubular main body into which the pile body having a protrusion provided on the peripheral surface is fitted from the end, and a tubular main body.
A fitting portion formed in the main body portion and a fitting portion formed in the main body portion so as to fit the protrusion portion by fitting and rotating the pile body.
With
The fitting portion has a first shape having a surface that is inclined so as to be separated from the end portion of the main body portion in the rotation direction of the pile body, and a second shape that is fitted between the protrusion portion and the pile body. Shape is formed ,
The second shape is formed in a direction intersecting the long axis direction of the pile body.
Pile joint.
前記嵌合部は、前記第1形状を形成する前記面に前記第2形状が形成される請求項1記載の杭体継手。 The pile joint according to claim 1, wherein the fitting portion is a pile body joint in which the second shape is formed on the surface forming the first shape. 前記杭体には、周方向に非等角度間隔で配置された複数の前記突部が設けられ、
前記本体部には、複数の前記突部に対応する複数の前記嵌合部が形成される請求項1又は請求項2記載の杭体継手。
The pile body is provided with a plurality of the protrusions arranged at non-equal angles in the circumferential direction.
The pile joint according to claim 1 or 2 , wherein a plurality of the fitting portions corresponding to the plurality of protrusions are formed on the main body portion.
前記本体部は、少なくとも前記嵌合部を覆う補強部材が設けられる請求項1から請求項の何れか1項記載の杭体継手。 The pile joint according to any one of claims 1 to 3 , wherein the main body is provided with a reinforcing member that covers at least the fitting portion. 前記補強部材に固定され、前記突部が前記嵌合部から外れることを防止する外れ防止部材を備える請求項記載の杭体継手。 The pile joint according to claim 4 , further comprising a detachment prevention member that is fixed to the reinforcing member and prevents the protrusion from being detached from the fitting portion. 前記補強部材は、前記嵌合部への前記突部の挿入を確認するための孔が形成される請求項又は請求項記載の杭体継手。 The pile joint according to claim 4 or 5 , wherein the reinforcing member is formed with a hole for confirming the insertion of the protrusion into the fitting portion. 前記嵌合部は、前記杭体の軸線方向に複数の前記第1形状、又は、複数の前記第2形状が形成される請求項1から請求項の何れか1項記載の杭体継手。 The pile joint according to any one of claims 1 to 6 , wherein the fitting portion is formed with a plurality of the first shape or a plurality of the second shapes in the axial direction of the pile body. 突部が周面に設けられた杭体と、
前記杭体が端部から嵌め込まれ、前記杭体の周面を覆う管状の本体部を有し、前記杭体を嵌め込んで回転させることで前記突部に嵌合する嵌合部に、前記杭体の回転方向で前記本体部の前記端部から離れるように傾斜する面を有する第1形状、又は前記突部と前記杭体との間に嵌入する第2形状が形成される杭体継手と、
を備える杭体連結構造。
A pile body with a protrusion on the peripheral surface and
The pile body is fitted from an end portion , has a tubular main body portion that covers the peripheral surface of the pile body, and is fitted into the protrusion portion by fitting and rotating the pile body. A pile joint in which a first shape having a surface inclined away from the end of the main body in the rotation direction of the pile or a second shape fitted between the protrusion and the pile is formed. When,
Pile body connection structure with.
前記突部は、平面状であり、平面内側が中抜きされている請求項8記載の杭体連結構造。 The pile connecting structure according to claim 8, wherein the protrusion is flat and the inside of the plane is hollowed out. 前記杭体継手によって連結される2本の前記杭体のうち一方の前記杭体は、地中に埋設される前記杭体であり、The pile body of one of the two pile bodies connected by the pile body joint is the pile body buried in the ground.
他方の前記杭体は、前記一方の杭体を埋設するために補助的に用いられる杭体であり、前記一方の杭体の上方に配置される、請求項8又は請求項9記載の杭体連結構造。The pile body according to claim 8 or 9, wherein the other pile body is a pile body auxiliary used for burying the one pile body, and is arranged above the one pile body. Connected structure.
突部が周面に設けられた杭体が端部から嵌め込まれ、前記杭体の周面を覆う管状の本体部を有し、前記杭体を嵌め込んで回転させることで前記突部に嵌合する嵌合部に、前記杭体の回転方向で前記本体部の前記端部から離れるように傾斜する面を有する第1形状、又は前記突部と前記杭体との間に嵌入する第2形状が形成される杭体継手によって2本の前記杭体を連結する杭体連結方法であって、
前記杭体を埋設する第1工程と、
前記埋設された前記杭体に対して他の前記杭体を立て、2本の前記杭体が前記杭体継手によって嵌合するように他の前記杭体を回転させる第2工程と、
を有する杭体連結方法。
A pile body having a protrusion provided on the peripheral surface is fitted from the end portion, has a tubular main body portion that covers the peripheral surface of the pile body, and is fitted into the protrusion by fitting and rotating the pile body. A first shape having a surface in which the fitting portion is inclined so as to be separated from the end portion of the main body portion in the rotation direction of the pile body, or a second shape to be fitted between the protrusion portion and the pile body. It is a pile body connecting method in which two said pile bodies are connected by a pile body joint in which a shape is formed.
The first step of burying the pile body and
A second step of erecting the other pile body with respect to the buried pile body and rotating the other pile body so that the two pile bodies are fitted by the pile body joint.
Pile body connection method having.
突部が周面に設けられた杭体が端部から嵌め込まれ、前記杭体の周面を覆う管状の本体部を有し、前記杭体を嵌め込んで回転させることで前記突部に嵌合する嵌合部に、前記杭体の回転方向で前記本体部の前記端部から離れるように傾斜する面を有する第1形状、又は前記突部と前記杭体との間に嵌入する第2形状が形成される杭体継手によって、第1杭体と第2杭体とを連結する杭体連結方法であって、
前記第2杭体を圧入機が備える第2把持手段によって把持する第1工程と、
前記第1杭体を前記圧入機が備える第1把持手段によって把持する第2工程と、
前記第1杭体と前記第2杭体との端部が当接するように前記第1把持手段を移動させ、前記第1把持手段又は前記第2把持手段を回転させることで、前記第1杭体と前記第2杭体とを前記杭体継手で連結する第3工程と、
を有する杭体連結方法。
A pile body having a protrusion provided on the peripheral surface is fitted from the end portion, has a tubular main body portion that covers the peripheral surface of the pile body, and is fitted into the protrusion by fitting and rotating the pile body. The first shape having a surface in which the fitting portion is inclined so as to be separated from the end portion of the main body portion in the rotation direction of the pile body, or the second shape to be fitted between the protrusion portion and the pile body. It is a pile body connecting method of connecting the first pile body and the second pile body by the pile body joint in which the shape is formed.
The first step of gripping the second pile body by the second gripping means provided in the press-fitting machine, and
The second step of gripping the first pile body by the first gripping means provided in the press-fitting machine, and
By moving the first gripping means so that the ends of the first pile body and the second pile body come into contact with each other and rotating the first gripping means or the second gripping means, the first pile The third step of connecting the body and the second pile body with the pile body joint, and
Pile body connection method having.
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