JP2019194411A - Auger shaft jointing structure and auger drilling method - Google Patents

Auger shaft jointing structure and auger drilling method Download PDF

Info

Publication number
JP2019194411A
JP2019194411A JP2018092153A JP2018092153A JP2019194411A JP 2019194411 A JP2019194411 A JP 2019194411A JP 2018092153 A JP2018092153 A JP 2018092153A JP 2018092153 A JP2018092153 A JP 2018092153A JP 2019194411 A JP2019194411 A JP 2019194411A
Authority
JP
Japan
Prior art keywords
auger
shaft
pair
female
male
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
JP2018092153A
Other languages
Japanese (ja)
Other versions
JP7122859B2 (en
Inventor
北村 精男
Morio Kitamura
北村  精男
勝彦 小野
Katsuhiko Ono
勝彦 小野
橋本 隆志
Takashi Hashimoto
隆志 橋本
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.)
Giken Seisakusho Co Ltd
Original Assignee
Giken Seisakusho 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 Giken Seisakusho Co Ltd filed Critical Giken Seisakusho Co Ltd
Publication of JP2019194411A publication Critical patent/JP2019194411A/en
Application granted granted Critical
Publication of JP7122859B2 publication Critical patent/JP7122859B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Earth Drilling (AREA)

Abstract

To provide an auger shaft jointing structure for making it possible that an auger shaft is jointed without increasing the size of the joint portion of the auger shaft in the radial direction and without requiring manual work on the joint portion of the auger shaft.SOLUTION: In a jointing structure of an auger shaft according to the present invention, two shaft members 20 and 30 at least any one of which constitutes an auger shaft 5a can be jointed coaxially each other and so as to make it possible to transmit a torque in such a way that torque transmission shaft portions 21,31 and the like are fitted by insertion operation, and the two shaft members can be jointed coaxially each other, and to make it possible to transmit a torque, and further the two shaft members can be separated by being separated from each other in the axial direction. In conjunction with the insertion operation, a pair of couplings 22, 32 that couple the two shaft members together so that the two shaft members are not pulled apart in the axial direction are provided so as to be accommodated in the inside 25 of the two shaft members joined to each other.SELECTED DRAWING: Figure 7

Description

本発明は、オーガ軸の接合構造及びオーガ掘削工法に関する。   The present invention relates to an auger shaft joint structure and an auger excavation method.

従来、地盤に杭を圧入する際に、杭を圧入する領域の地盤をオーガ装置で掘削するオーガ掘削工法が併用されることがある。
一般に、周面にオーガスクリュー、先端にオーガヘッドを保持するオーガ軸を軸方向に継ぐための接合部は、回転トルクを受ける多角形断面等のオスメス一対で構成されたトルク伝達軸部と、軸方向力を受けるピンとで構成されている(特許文献1参照)。
オス型トルク伝達軸部とメス型トルク伝達軸部には、孔又は溝が形成され、接合時にピン孔が形成される構造を有する。オーガ軸を接合する際には、オス型トルク伝達軸部をメス型トルク伝達軸部に挿し込み、重なり合った部分に構成されるピン孔にピンを挿入することで、オス型トルク伝達軸部を一端に有した軸部材と、メス型トルク伝達軸部を一端に有した軸部材とを互いに離脱不能にして、同軸、かつ、トルク伝達可能に接合する。
特許文献2にあっては、出力軸に対する掘削ロッド体の自動連結装置において、ロックピースをオス軸のロック溝に対して進退させる動力シリンダ等を含んだ機械機構が構成されている。
Conventionally, when a pile is press-fitted into the ground, an auger excavation method of excavating the ground in a region where the pile is press-fitted with an auger device may be used in combination.
In general, the joint for connecting the auger screw holding the auger screw to the peripheral surface and the auger shaft holding the auger head in the axial direction is composed of a torque transmission shaft part composed of a pair of male and female parts such as a polygonal section that receives rotational torque, and a shaft It is comprised with the pin which receives directional force (refer patent document 1).
The male torque transmission shaft portion and the female torque transmission shaft portion have a structure in which holes or grooves are formed and pin holes are formed at the time of joining. When joining the auger shaft, the male torque transmission shaft portion is inserted into the female torque transmission shaft portion, and the pin is inserted into the pin hole formed in the overlapping portion. The shaft member having one end and the shaft member having the female torque transmission shaft portion at one end are made detachable from each other, and are joined coaxially and capable of transmitting torque.
In Patent Literature 2, a mechanical mechanism including a power cylinder and the like for advancing and retracting a lock piece with respect to a lock groove of a male shaft is configured in an automatic connecting device for an excavating rod body with respect to an output shaft.

特開平10−110449号公報JP 10-110449 A 特開昭61−122391号公報JP 61-122391 A

しかしながら、上述のピンを用いたオーガ軸の接合構造にあっては、ピンを挿入する作業が必要となる。ピンの挿入作業は作業者が行う。そのため、人為的ミスにより接合不良が生じるおそれがある。
また、オーガ装置を建て込みながら接合する場合には、高所でピンを挿入する作業が強いられるが容易ではない。特殊な足場の組立や、安全性の確保が必要となる。
高所でピンを挿入する作業を避けるには、オーガ軸を横倒しにして接合せざるを得ず、その場合には、図12に示すように接合後に長大となったオーガ装置3Zを建て込まなければならないが、先に建て込まれた杭2bにオーガ5Zを挿入する場合には、既に組み上がったオーガ装置3Zの下端を杭2bの上端より高く吊り上げなければならない。したがって、吊り込み揚程が大きく、クレーン6の吊り上げ能力(揚程及び荷重)が高く要求される。またこの場合に、上部構造物(橋桁など)により高さ制限がある現場では、オーガ装置3Zを使用できなくなるおそれがある。
ピンの挿入作業を機械化する場合、特許文献2に記載されるように連結装置がオーガ軸より大径化する場合がある。この場合、掘削時の排土の上昇を妨げたり、土や石が詰まったりして好ましくない。
However, in the auger shaft joining structure using the above-described pin, an operation of inserting the pin is required. The operator performs pin insertion work. For this reason, there is a risk that poor bonding may occur due to human error.
Moreover, when joining while building an auger apparatus, the operation | work which inserts a pin in a high place is forced, but it is not easy. It is necessary to assemble special scaffolds and ensure safety.
In order to avoid the work of inserting a pin at a high place, the auger shaft must be laid sideways and joined, and in that case, an auger device 3Z that is long after joining must be installed as shown in FIG. However, when the auger 5Z is inserted into the pile 2b previously built, the lower end of the already assembled auger device 3Z must be lifted higher than the upper end of the pile 2b. Therefore, the lifting lift is large and the lifting capacity (lift and load) of the crane 6 is required to be high. Further, in this case, there is a possibility that the auger device 3Z cannot be used at a site where the height is limited by the upper structure (such as a bridge girder).
When the pin insertion work is mechanized, the connecting device may have a larger diameter than the auger shaft as described in Patent Document 2. In this case, it is not preferable because the rise of soil removal during excavation is hindered or soil or stones are clogged.

本発明は以上の従来技術における問題に鑑みてなされたものであって、オーガ軸の接合部を径方向に大型化することなく、オーガ軸の接合部に対する人手作業を要することなくオーガ軸を接合可能にすることを課題とする。   The present invention has been made in view of the above problems in the prior art, and joins an auger shaft without manually increasing the joint portion of the auger shaft in the radial direction and without requiring manual work on the joint portion of the auger shaft. The challenge is to make it possible.

以上の課題を解決するための請求項1記載の発明は、少なくともいずれか一方がオーガ
軸を構成する2つの軸部材を軸方向に挿し込む挿し込み動作により嵌合させて互いに同軸に、かつ、トルク伝達可能に接合可能であり、前記2つの軸部材同士を軸方向に引き離して互いに離脱させて分離可能である構造を有するオーガ軸の接合構造であって、
前記挿し込み動作に連動して、前記2つの軸部材同士が軸方向に引き離れないように前記2つの軸部材同士を連結する一対の連結器が、互いに接合した状態の前記2つの軸部材の内部に収まるように設けられたオーガ軸の接合構造である。
The invention according to claim 1 for solving the above-described problem is that at least one of them is fitted by a inserting operation of inserting two shaft members constituting the auger shaft in the axial direction so as to be coaxial with each other, and An auger shaft joining structure having a structure that can be joined so as to transmit torque, and the two shaft members are separated in the axial direction by separating them from each other;
In conjunction with the insertion operation, a pair of couplers for connecting the two shaft members to each other so that the two shaft members are not pulled apart in the axial direction are connected to each other. It is a joint structure of an auger shaft provided so as to fit inside.

請求項2記載の発明は、前記連結器は、前記挿し込み動作に連動して弾性変形を経て嵌合する鉤状の嵌合部を有したオス、メス一対で構成された請求項1に記載のオーガ軸の接合構造である。   According to a second aspect of the present invention, in the first aspect, the coupler is composed of a pair of males and females having a hook-shaped fitting portion that is fitted through elastic deformation in conjunction with the insertion operation. The auger shaft joining structure.

請求項3記載の発明は、前記2つの軸部材をトルク伝達可能に嵌合するオス、メス一対で構成され、メス型の内周面にオス型の外周面を嵌合させる構造のトルク伝達軸部を備え、
前記挿し込み動作の過程で、前記一対の連結器同士の接触及び前記一対のトルク伝達軸部同士の嵌合のいずれよりも先に、互いに嵌合を始める一対の規制嵌合部を有し、
前記一対のトルク伝達軸部の構造自体が嵌合可能な軸回りの複数の角度のうちの一部の角度で前記一対の連結器が連結可能であり、
前記一対の規制嵌合部が嵌合可能な角度が、前記一対の連結器が連結可能な角度に規制されている請求項1又は請求項2に記載のオーガ軸の接合構造である。
According to a third aspect of the present invention, there is provided a torque transmitting shaft having a structure in which a male-type outer peripheral surface is fitted to a female-type inner peripheral surface, and the male shaft and the female pair are configured to fit the two shaft members so as to transmit torque. Part
In the course of the insertion operation, before any of the contact between the pair of couplers and the fitting of the pair of torque transmission shaft portions, a pair of restriction fitting portions that start fitting with each other,
The pair of couplers can be coupled at a part of a plurality of angles around an axis to which the structure of the pair of torque transmission shaft portions can be fitted;
3. The auger shaft joining structure according to claim 1, wherein an angle at which the pair of regulation fitting portions can be fitted is regulated to an angle at which the pair of couplers can be coupled.

請求項4記載の発明は、前記規制嵌合部がオス、メス一対で構成され、
オス型の前記規制嵌合部は、メス型の前記トルク伝達軸部の周壁部の一周に満たない一部を、軸部材の先端側に延長した態様の突出部であり、
メス型の前記規制嵌合部は、オス型の前記トルク伝達軸部より軸部材の中央側に設けられ、前記突出部と嵌合するように外壁部の一部を切り欠いた切欠部である請求項3に記載のオーガ軸の接合構造である。
In the invention according to claim 4, the restriction fitting portion is constituted by a male and a female pair,
The male restriction fitting portion is a protruding portion in a mode in which a part of the peripheral wall portion of the female torque transmission shaft portion that is less than one circumference is extended to the distal end side of the shaft member,
The female-type regulation fitting portion is a cutout portion that is provided closer to the center side of the shaft member than the male-type torque transmission shaft portion, and a part of the outer wall portion is cut away so as to be fitted to the protruding portion. The auger shaft joining structure according to claim 3.

請求項5記載の発明は、前記一対の連結器の一方は、メス型の前記トルク伝達軸部を有する軸部材の内部空間であって、メス型の前記トルク伝達軸部の奥側に形成された内部空間に配置され、
前記一対の連結器の他方は、オス型の前記トルク伝達軸部を有する軸部材に固定され、オス型の前記トルク伝達軸部より先端側に配置され、
前記一対の連結器は、オス型の前記トルク伝達軸部を受容したメス型の前記トルク伝達軸部の奥側に残る内部空間で連結する請求項1から請求項4のうちいずれか一に記載のオーガ軸の接合構造である。
According to a fifth aspect of the present invention, one of the pair of couplers is an internal space of a shaft member having the female torque transmission shaft portion, and is formed on the inner side of the female torque transmission shaft portion. Placed in the internal space
The other of the pair of couplers is fixed to a shaft member having the male torque transmission shaft portion, and is disposed on the tip side from the male torque transmission shaft portion,
5. The pair of couplers are connected to each other in an internal space remaining on the back side of the female torque transmission shaft portion that receives the male torque transmission shaft portion. 6. The auger shaft joining structure.

請求項6記載の発明は、前記連結器はオス、メス一対で構成され、メス型の前記連結器は軸部材の下端部に設けられ、オス型の前記連結器は軸部材の上端部に設けられた請求項1から請求項5のうちいずれか一に記載のオーガ軸の接合構造である。   According to a sixth aspect of the present invention, the coupler is composed of a male and a female pair, the female coupler is provided at the lower end of the shaft member, and the male coupler is provided at the upper end of the shaft member. The auger shaft joining structure according to any one of claims 1 to 5.

請求項7記載の発明は、前記一対の連結器のうち少なくとも一方は、軸部材からの分離操作が外部から可能にされた請求項1から請求項6のうちいずれか一に記載のオーガ軸の接合構造である。   The invention according to claim 7 is the auger shaft according to any one of claims 1 to 6, wherein at least one of the pair of couplers can be separated from the shaft member from the outside. It is a junction structure.

請求項8記載の発明は、前記一対の連結器の連結解除操作が外部から可能にされた請求項1から請求項6のうちいずれか一に記載のオーガ軸の接合構造である。   The invention according to claim 8 is the auger shaft joining structure according to any one of claims 1 to 6, wherein the connection releasing operation of the pair of connectors is made possible from the outside.

請求項9記載の発明は、請求項1から請求項8のうちいずれか一に記載のオーガ軸の接合構造を備えたオーガ装置を建て込んで当該オーガ装置により地盤を掘削するオーガ掘削
工法であって、
オーガ装置の建て込み工程において、前記2つの軸部材の一方を地盤上に建て込み、前記2つの軸部材の他方を吊り込み降下させることで前記挿し込み動作を実行し、前記一対の連結器を互いに連結させて前記2つの軸部材同士の接合を完了するオーガ掘削工法である。
The invention according to claim 9 is an auger excavation method in which an auger apparatus having the auger shaft joining structure according to any one of claims 1 to 8 is built and the ground is excavated by the auger apparatus. And
In the step of installing the auger device, one of the two shaft members is built on the ground, and the other of the two shaft members is suspended and lowered to execute the insertion operation, and the pair of connectors is This is an auger excavation method in which the two shaft members are joined together to complete the joining.

請求項10記載の発明は、請求項7に記載のオーガ軸の接合構造を備えたオーガ装置を建て込んで当該オーガ装置により地盤を掘削するオーガ掘削工法であって、
掘削に使用した前記2つの軸部材を分離する工程において、オーガ装置の外部から操作して前記一対の連結器のうちの一方を、当該一方が固定されていた一方の軸部材から分離し、次に、他方の軸部材及び前記一対の連結器を、前記一方の軸部材から軸方向に引き離して分離するオーガ掘削工法である。
The invention according to claim 10 is an auger excavation method in which the auger apparatus having the auger shaft joining structure according to claim 7 is built and excavated by the auger apparatus.
In the step of separating the two shaft members used for excavation, one of the pair of couplers is separated from the one shaft member on which the one is fixed by operating from the outside of the auger device, and And an auger excavation method in which the other shaft member and the pair of couplers are separated from the one shaft member in the axial direction.

請求項11記載の発明は、請求項8に記載のオーガ軸の接合構造を備えたオーガ装置を建て込んで当該オーガ装置により地盤を掘削するオーガ掘削工法であって、
掘削に使用した前記2つの軸部材を分離する工程において、オーガ装置の外部から操作して前記一対の連結器同士の連結を解除し、次に、前記2つの軸部材同士を軸方向に引き離して分離するオーガ掘削工法である。
The invention according to claim 11 is an auger excavation method in which the auger device having the auger shaft joining structure according to claim 8 is built and excavated by the auger device.
In the step of separating the two shaft members used for excavation, the connection between the pair of connectors is released by operating from the outside of the auger device, and then the two shaft members are pulled apart in the axial direction. It is an auger excavation method to separate.

本発明によれば、トルク伝達可能に接合するための2つの軸部材を軸方向に挿し込む挿し込み動作に連動して、当該2つの軸部材同士が軸方向に引き離れないように当該2つの軸部材同士を連結する一対の連結器が、互いに接合した状態の当該2つの軸部材の内部に収まるように設けられているので、オーガ軸の接合部を径方向に大型化することなく、オーガ軸の接合部に対する人手作業を要することなくオーガ軸を接合することができる。したがって、吊り込み揚程を抑えつつ、高所での人手作業も要することなくオーガ装置を建て込むことができる。   According to the present invention, the two shaft members for joining in such a manner that torque can be transmitted are interlocked with the inserting operation of inserting the two shaft members in the axial direction so that the two shaft members are not pulled apart in the axial direction. Since the pair of couplers for connecting the shaft members are provided so as to be accommodated in the two shaft members in a state of being joined to each other, the auger shaft joining portion is not enlarged in the radial direction. The auger shaft can be joined without requiring manual work for the joint portion of the shaft. Therefore, the auger device can be built without the need for manual work at a high place while suppressing the lifting lift.

本発明の一実施形態に係る杭圧入機及びオーガ装置による施工風景図である。It is the construction scenery figure by the pile press-fit machine and auger apparatus concerning one embodiment of the present invention. 本発明の一実施形態に係る上側軸部材の下端部の縦断面図である。It is a longitudinal cross-sectional view of the lower end part of the upper side shaft member which concerns on one Embodiment of this invention. 図2に示したA1−A1線位置の横断面図(a)、B1−B1線位置の横断面図(b)及びC1−C1線位置の横断面図(c)である。FIG. 3 is a cross-sectional view (a) at the position A1-A1 shown in FIG. 2, a cross-sectional view (b) at the position B1-B1 and a cross-sectional view (c) at the position C1-C1. 本発明の一実施形態に係る下側軸部材の上端部の縦断面図である。It is a longitudinal cross-sectional view of the upper end part of the lower side shaft member which concerns on one Embodiment of this invention. 図4に示したA2−A2線位置の横断面図(a)、B2−B2線位置の横断面図(b)及びC2−C2線位置の横断面図(c)である。FIG. 5 is a cross-sectional view (a) at the position A2-A2 shown in FIG. 4, a cross-sectional view (b) at the position B2-B2, and a cross-sectional view (c) at the position C2-C2. 本発明の一実施形態に係るオスメス一対の連結器の連結直前場面の斜視図である。It is a perspective view of the scene just before the connection of a pair of male and female connectors according to an embodiment of the present invention. 本発明の一実施形態に係るオーガ軸の接合工程を説明するためのオーガ軸の接合構造の縦断面図である。It is a longitudinal cross-sectional view of the joining structure of the auger shaft for demonstrating the joining process of the auger shaft which concerns on one Embodiment of this invention. 本発明の一実施形態に係るオーガ軸の分離工程を説明するためのオーガ軸の接合構造の縦断面図である。It is a longitudinal cross-sectional view of the joining structure of the auger shaft for demonstrating the isolation | separation process of the auger shaft which concerns on one Embodiment of this invention. 本発明の一実施形態に係るオスメス一対の連結器の分離途上の斜視図である。It is a perspective view in the middle of separation of a pair of male and female connectors concerning one embodiment of the present invention. 本発明の他の一実施形態に係るオーガ軸の分離工程を説明するためのオーガ軸の接合構造の縦断面図である。It is a longitudinal cross-sectional view of the joining structure of the auger shaft for demonstrating the isolation | separation process of the auger shaft which concerns on other one Embodiment of this invention. 本発明の他の一実施形態に係るオーガ軸の接合構造の縦断面図である。It is a longitudinal cross-sectional view of the joining structure of the auger shaft which concerns on other one Embodiment of this invention. 従来技術に係る杭圧入機及びオーガ装置による施工風景図である。It is a construction scenery figure by the pile press-fitting machine and auger apparatus which concern on a prior art.

以下に本発明の一実施形態につき図面を参照して説明する。以下は本発明の一実施形態であって本発明を限定するものではない。   An embodiment of the present invention will be described below with reference to the drawings. The following is one embodiment of the present invention and does not limit the present invention.

図1に杭圧入機1及びオーガ装置3による施工風景を示す。杭圧入機1は、地盤Gに圧入された既設杭2aの上端を掴み、上下動可能な杭チャック装置1aで新たな杭2bを把持して地盤Gに圧入する。杭2a,2bとしては、断面の外側が角形で内側が円形の管状杭が適用されている。杭2bの圧入抵抗を低減するためにオーガ装置3が併用される。
オーガ装置3は、オーガ駆動部4とオーガ5とを備える。オーガ5は杭2bの内部に上端から挿入されて使用される。オーガ5は、オーガ軸5aと、オーガ軸5aの先端に固定されたオーガヘッド5cと、オーガ軸5aの周面に固定されたオーガスクリュー5b(図7,図8参照)とを備える。
オーガ駆動部4の回転出力軸4aとオーガ軸5aの上端とが接合し、オーガ駆動部4のフレーム下端部4bが杭2bの外側に嵌って回転不能に接続する。杭2bは杭圧入機1の杭チャック装置1aにより回転不能に把持されているので、オーガ駆動部4が稼働することにより、オーガ軸5aが地盤G及び杭2bに対してその中心軸回りに回転する。オーガ軸5aが回転すると、オーガ軸5aに固定されたオーガヘッド5c及びオーガスクリュー5bもオーガ軸5aと共に回転し、オーガヘッド5cによる地盤の掘削や、オーガスクリュー5bによる土砂等の搬送、排出が行える。
FIG. 1 shows a construction scene of the pile press-in machine 1 and the auger device 3. The pile presser 1 grips the upper end of the existing pile 2a press-fitted into the ground G, and grips and press-fits the new pile 2b with the pile chuck device 1a that can move up and down. As the piles 2a and 2b, tubular piles having a rectangular outer side and a circular inner side are applied. The auger device 3 is used in combination to reduce the press-fit resistance of the pile 2b.
The auger device 3 includes an auger drive unit 4 and an auger 5. The auger 5 is used by being inserted into the pile 2b from the upper end. The auger 5 includes an auger shaft 5a, an auger head 5c fixed to the tip of the auger shaft 5a, and an auger screw 5b (see FIGS. 7 and 8) fixed to the peripheral surface of the auger shaft 5a.
The rotation output shaft 4a of the auger drive unit 4 and the upper end of the auger shaft 5a are joined together, and the frame lower end 4b of the auger drive unit 4 is fitted on the outside of the pile 2b so as not to rotate. Since the pile 2b is gripped non-rotatably by the pile chuck device 1a of the pile press-fitting machine 1, the auger shaft 5a rotates around its center axis with respect to the ground G and the pile 2b when the auger drive unit 4 operates. To do. When the auger shaft 5a rotates, the auger head 5c and the auger screw 5b fixed to the auger shaft 5a also rotate together with the auger shaft 5a, and excavation of the ground by the auger head 5c and transport and discharge of earth and sand by the auger screw 5b can be performed. .

本実施形態のオーガ軸の接合構造は、オーガ駆動部4の回転出力軸4aと、オーガ軸5aの上端との接合部10に適用される。ただし、オーガ軸5aの途中を分割した構成とした場合の接合部(図7、図8参照)や、オーガヘッド5cの支持軸とオーガ軸5aとの接合部など他の部分にも適宜に適用する。   The auger shaft joining structure of the present embodiment is applied to the joint 10 between the rotation output shaft 4a of the auger drive unit 4 and the upper end of the auger shaft 5a. However, the present invention is also applied to other portions such as a joint portion (see FIGS. 7 and 8) when the middle of the auger shaft 5a is divided, and a joint portion between the support shaft of the auger head 5c and the auger shaft 5a. To do.

本実施形態のオーガ軸の接合構造における上側軸部材20を図2及び図3に、下側軸部材30を図4及び図5に示す。接合部10では上側軸部材20が回転出力軸4aに相当し、下側軸部材30がオーガ軸5aに相当する。
上側軸部材20は、断面B1−B1のメス型トルク伝達軸部21と、メス型連結器22と、C1−C1断面のオス型規制嵌合部23とを備える。メス型連結器22が現れる断面をA1−A1断面に示す。メス型連結器22の基端部は、ピン24により着脱可能にして上側軸部材20に固定されている。メス型連結器22は上側軸部材20の内部空間25に配置されている。
下側軸部材30は、断面B2−B2のオス型トルク伝達軸部31と、オス型連結器32と、C2−C2断面のメス型規制嵌合部33とを備える。オス型連結器32が現れる断面をA2−A2断面に示す。オス型連結器32の基端部は、軸部材30の先端部に固定されている。
The upper shaft member 20 in the joint structure of the auger shaft of this embodiment is shown in FIGS. 2 and 3, and the lower shaft member 30 is shown in FIGS. In the joint portion 10, the upper shaft member 20 corresponds to the rotation output shaft 4a, and the lower shaft member 30 corresponds to the auger shaft 5a.
The upper shaft member 20 includes a female torque transmission shaft portion 21 having a cross section B1-B1, a female connector 22, and a male regulation fitting portion 23 having a C1-C1 cross section. A cross section in which the female connector 22 appears is shown in the A1-A1 cross section. The base end portion of the female connector 22 is fixed to the upper shaft member 20 by being detachable by a pin 24. The female connector 22 is disposed in the internal space 25 of the upper shaft member 20.
The lower shaft member 30 includes a male torque transmission shaft portion 31 having a cross section B2-B2, a male coupler 32, and a female restriction fitting portion 33 having a C2-C2 cross section. A cross section in which the male coupler 32 appears is shown in the A2-A2 cross section. The proximal end portion of the male connector 32 is fixed to the distal end portion of the shaft member 30.

上側軸部材20においては、接続先端側から、オス型規制嵌合部23、メス型トルク伝達軸部21、内部空間25(メス型連結器22)の順でこれらが軸方向に配置されている。メス型トルク伝達軸部21からは、回り一周に亘る周壁部を有して内部空間を形成しており、メス型連結器22は、メス型トルク伝達軸部21の奥側に形成された内部空間25に配置されている。
下側軸部材30においては、接続先端側から、オス型連結器32、オス型トルク伝達軸部31、メス型規制嵌合部33の順でこれらが軸方向に配置されている。したがって、オス型連結器32は、オス型トルク伝達軸部31より先端側に配置されている。
In the upper shaft member 20, the male restriction fitting portion 23, the female torque transmission shaft portion 21, and the internal space 25 (female coupler 22) are arranged in the axial direction from the connection distal end side. . The female torque transmission shaft portion 21 has a peripheral wall portion that extends around the entire circumference to form an internal space, and the female connector 22 is an inner portion formed on the inner side of the female torque transmission shaft portion 21. Arranged in the space 25.
In the lower shaft member 30, the male coupler 32, the male torque transmission shaft portion 31, and the female restriction fitting portion 33 are arranged in the axial direction from the connection distal end side. Therefore, the male coupler 32 is disposed on the tip side from the male torque transmission shaft portion 31.

メス型トルク伝達軸部21とオス型トルク伝達軸部31とは、図7に示すように互いにトルク伝達可能に嵌合するオスメス一対を構成する。メス型トルク伝達軸部21は、軸部材20と同軸の内周面に、トルク伝達可能に嵌合するための断面形状が形成されたメス型
の軸である。オス型トルク伝達軸部31は、軸部材30と同軸の外周面に、トルク伝達可能に嵌合するための断面形状が形成されたオス型の軸である。
メス型トルク伝達軸部21とオス型トルク伝達軸部31の互いにトルク伝達可能に嵌合するための形状は、多角形断面形状や、軸方向の溝を有したスプラインその他任意である。本実施形態では図3(b)、図5(b)に示すように、中心を共有する2つの同じ大きさ正六角形を30°ずらした断面形状で12条の凸条が軸方向に形成される形状である。したがって、メス型トルク伝達軸部21とオス型トルク伝達軸部31とは、30°ずつ異なる12の相対角度で嵌合可能である。すなわち、一対のトルク伝達軸部21,31の構造自体が嵌合可能な軸回りの複数の角度の数は、12である。
この例のようにトルク伝達軸部は、局所応力を避けるためにトルク伝達時に力が負荷される面を均等に一周に亘って分散した形状が望ましく、自ずと嵌合可能な相対角も増加する。
As shown in FIG. 7, the female torque transmission shaft portion 21 and the male torque transmission shaft portion 31 constitute a male-female pair that are fitted to each other so as to be able to transmit torque. The female torque transmission shaft portion 21 is a female shaft having a cross-sectional shape formed on an inner peripheral surface coaxial with the shaft member 20 so as to be able to transmit torque. The male torque transmission shaft portion 31 is a male shaft having a cross-sectional shape formed on the outer peripheral surface coaxial with the shaft member 30 so as to be able to transmit torque.
The shape for fitting the female torque transmission shaft portion 21 and the male torque transmission shaft portion 31 to each other so as to be able to transmit torque is a polygonal cross-sectional shape, a spline having an axial groove, or any other shape. In this embodiment, as shown in FIGS. 3 (b) and 5 (b), 12 ridges are formed in the axial direction in a cross-sectional shape in which two regular hexagons having the same center are shifted by 30 °. Shape. Therefore, the female torque transmission shaft portion 21 and the male torque transmission shaft portion 31 can be fitted at 12 relative angles that are different by 30 °. That is, the number of the plurality of angles around the axis to which the structure itself of the pair of torque transmission shaft portions 21 and 31 can be fitted is 12.
As in this example, the torque transmission shaft portion desirably has a shape in which the surface to which a force is applied during torque transmission is evenly distributed over one round in order to avoid local stress, and the relative angle that can be naturally fitted increases.

メス型連結器22とオス型連結器32とは、図6、図7に示すように互いに連結するオスメス一対を構成する。
図6に示すようにメス型連結器22は、内向きの係止爪を有した鉤状の嵌合部22a,22aを有する。嵌合部22a,22aを形成する部品はバネ鋼材などの弾性材料で構成される。
図6に示すようにオス型連結器32は、相対する両面に嵌合溝32a,32aと、案内傾斜面32b,32bとを有する。嵌合溝32a,32aより先端側に案内傾斜面32b,32bが配置されている。
矢印X1で示すように、メス型連結器22とオス型連結器32とを近づけ接触させ、メス型連結器22の嵌合部22a,22a間にオス型連結器32を押し込むことにより、メス型連結器22の弾性変形を伴って、案内傾斜面32b,32bにより嵌合部22a,22a同士が離れ、嵌合部22a,22aが案内傾斜面32b,32bを乗り越えて嵌合溝32a,32aに嵌る。鉤状の嵌合部が嵌合するため、メス型連結器22とオス型連結器32の両者は軸方向力によっては離脱しないように連結する。
本実施形態の構造の場合、メス型連結器22とオス型連結器32の連結可能な角度は180°ずつ異なる2つの角度である。
The female connector 22 and the male connector 32 constitute a male-female pair to be connected to each other as shown in FIGS.
As shown in FIG. 6, the female coupler 22 has hook-shaped fitting portions 22a and 22a each having an inward locking claw. The parts forming the fitting portions 22a and 22a are made of an elastic material such as a spring steel material.
As shown in FIG. 6, the male coupler 32 has fitting grooves 32a and 32a and guide inclined surfaces 32b and 32b on opposite surfaces. Guide inclined surfaces 32b and 32b are arranged on the tip side from the fitting grooves 32a and 32a.
As shown by the arrow X1, the female coupler 22 and the male coupler 32 are brought into close contact with each other, and the male coupler 32 is pushed between the fitting portions 22a and 22a of the female coupler 22, thereby forming the female coupler. With the elastic deformation of the coupler 22, the fitting inclined surfaces 32b and 32b separate the fitting portions 22a and 22a, and the fitting portions 22a and 22a get over the guiding inclined surfaces 32b and 32b to the fitting grooves 32a and 32a. fit. Since the hook-shaped fitting portion is fitted, both the female connector 22 and the male connector 32 are connected so as not to be separated by an axial force.
In the case of the structure of the present embodiment, the connectable angles of the female connector 22 and the male connector 32 are two angles that differ by 180 °.

オス型規制嵌合部23とメス型規制嵌合部33とは、互いに嵌合するオスメス一対を構成する。
図2及び図3(c)に示すようにオス型規制嵌合部23は、メス型トルク伝達軸部21の
周壁部の一周に満たない一部を、軸部材20の先端側に延長した態様の突出部である。
図4及び図5(c)に示すようにメス型規制嵌合部33は、オス型トルク伝達軸部31よ
り軸部材30の中央側(反対端部寄り)に設けられ、上記突出部であるオス型規制嵌合部23と嵌合するように外壁部の一部を切り欠いた切欠部である。
オス型規制嵌合部23とメス型規制嵌合部33との嵌合可能な角度は1つの角度に定まっている。
The male restriction fitting portion 23 and the female restriction fitting portion 33 constitute a pair of male and female fitting each other.
As shown in FIGS. 2 and 3 (c), the male restriction fitting portion 23 is an aspect in which a portion of the peripheral wall portion of the female torque transmission shaft portion 21 that is less than one turn is extended to the distal end side of the shaft member 20. It is a protrusion part.
As shown in FIGS. 4 and 5 (c), the female type regulation fitting portion 33 is provided on the center side (near the opposite end portion) of the shaft member 30 with respect to the male type torque transmission shaft portion 31, and is the protruding portion. This is a cutout part in which a part of the outer wall part is cut out so as to be fitted with the male type regulation fitting part 23.
The fitting angle between the male restriction fitting portion 23 and the female restriction fitting portion 33 is fixed to one angle.

図3及び図5に示すように、一対のトルク伝達軸部21,31の構造自体が嵌合可能な軸回りの12の角度のうちの2つの角度で一対の連結器22,32が連結可能であり、一対の規制嵌合部23,33が嵌合可能な角度が、一対の連結器22,32が連結可能な1つの角度に規制されている。なお、一対の連結器22,32が連結可能な角度が2つなので、一対の規制嵌合部23,33が嵌合可能な角度も、それと同じ2つの角度としても実施できる。   As shown in FIGS. 3 and 5, the pair of couplers 22 and 32 can be connected at two of the 12 angles around the axis to which the structure of the pair of torque transmission shafts 21 and 31 can be fitted. The angle at which the pair of restriction fitting portions 23, 33 can be fitted is restricted to one angle at which the pair of couplers 22, 32 can be connected. Since there are two angles at which the pair of couplers 22 and 32 can be coupled, the angle at which the pair of restricting fitting portions 23 and 33 can be fitted can be implemented as the same two angles.

さて、図7を参照して本実施形態のオーガ軸の接合構造の接合動作につき説明する。
図7(a)に示すように、上側軸部材20の下端と下側軸部材30の上端とを対向させ、
上側軸部材20と下側軸部材30とを略同軸に配置して、図7(a)→(b)→(c)→(d)という
ように連結器22,32が連結完了するまで近づけていく。すなわち、2つの軸部材20,30を軸方向に挿し込む挿し込み動作により互いに嵌合させて接合する。
挿し込み動作の過程における図7(a)に示す場面においては、オス型トルク伝達軸部3
1より先端側の案内部34がメス型トルク伝達軸部21内に入り始めるとともに、オス型規制嵌合部23とメス型規制嵌合部33との嵌合が始まる。この時、一対の連結器22,32同士の接触及び一対のトルク伝達軸部21,31同士の嵌合は始まっていない。したがって、挿し込み動作の過程で、一対の連結器22,32同士の接触及び一対のトルク伝達軸部21,31同士の嵌合のいずれよりも先に、一対の規制嵌合部23,33は互いに嵌合を始める。
この先行して嵌合する一対の規制嵌合部23,33により、連結器22,32が連結可能でトルク伝達軸部21,31が嵌合可能な角度に、2つの軸部材20,30の相対角度を案内するので、接合作業を失敗することがない。
また、規制嵌合部23,33は、外観上確認しやすい外周壁部の突出部と切欠部であって、本実施形態では1つの突出部と1つの切欠部で構成されており、一つ一つが大きく形成されているため、さらに外観上確認しやすい。
したがって、突出部であるオス型規制嵌合部23と、切欠部であるメス型規制嵌合部33とを、外観観察により対向させて2つの軸部材20,30の相対角度を決める作業が容易である。オス型規制嵌合部23とメス型規制嵌合部33とが嵌り始めれば、図7(a)→(b)→(c)→(d)というように挿し込み動作を遂行すれば容易に接合は完了する。
Now, the joining operation of the auger shaft joining structure of this embodiment will be described with reference to FIG.
As shown in FIG. 7 (a), the lower end of the upper shaft member 20 and the upper end of the lower shaft member 30 are opposed to each other,
The upper shaft member 20 and the lower shaft member 30 are arranged substantially coaxially and close to each other until the couplers 22 and 32 are connected as shown in FIGS. 7 (a) → (b) → (c) → (d). To go. That is, the two shaft members 20 and 30 are fitted and joined to each other by an insertion operation of inserting them in the axial direction.
In the scene shown in FIG. 7 (a) in the process of insertion, the male torque transmission shaft 3
1, the guide portion 34 on the tip side from 1 starts to enter the female torque transmission shaft portion 21, and the fitting of the male restriction fitting portion 23 and the female restriction fitting portion 33 starts. At this time, the contact between the pair of couplers 22 and 32 and the fitting between the pair of torque transmission shaft portions 21 and 31 have not started. Therefore, in the course of the insertion operation, the pair of restricting fitting portions 23 and 33 is prior to the contact between the pair of couplers 22 and 32 and the fitting between the pair of torque transmission shaft portions 21 and 31. Start mating with each other.
By the pair of restriction fitting portions 23 and 33 that are fitted in advance, the couplers 22 and 32 can be connected and the torque transmission shaft portions 21 and 31 can be fitted to each other at an angle at which the two shaft members 20 and 30 can be fitted. Since the relative angle is guided, the joining operation does not fail.
In addition, the restriction fitting portions 23 and 33 are a protruding portion and a cutout portion of the outer peripheral wall portion that are easy to check in appearance. In the present embodiment, the restriction fitting portions 23 and 33 are configured by one protruding portion and one cutout portion. Since one is formed larger, it is easier to confirm in appearance.
Therefore, it is easy to determine the relative angle between the two shaft members 20 and 30 by causing the male restriction fitting portion 23 that is a protruding portion and the female restriction fitting portion 33 that is a notch portion to face each other through external observation. It is. If the male restriction fitting portion 23 and the female restriction fitting portion 33 start to fit, it is easy to perform the insertion operation as shown in FIG. 7 (a) → (b) → (c) → (d). Joining is complete.

挿し込み動作の過程における図7(b)に示す場面においては、メス型トルク伝達軸部2
1とオス型トルク伝達軸部31との嵌合が始まる。
挿し込み動作の過程における図7(c)に示す場面においては、オス型連結器32の案内
傾斜面32b,32bがメス型連結器22の鉤状の嵌合部22a,22aを押し広げ始め、メス型連結器22とオス型連結器32との連結動作が開始される。
なお、メス型トルク伝達軸部21とオス型トルク伝達軸部31との嵌合と、メス型連結器22とオス型連結器32との連結の開始の後先は問わない。
図7(d)に示す挿し込み動作の過程の終点、すなわち、接合完了場面では、メス型トル
ク伝達軸部21とオス型トルク伝達軸部31との嵌合、オス型規制嵌合部23とメス型規制嵌合部33との嵌合、メス型連結器22とオス型連結器32との連結が同時に完了する。
In the scene shown in FIG. 7 (b) in the process of insertion, the female torque transmission shaft 2
1 and the male torque transmission shaft portion 31 begin to be fitted.
In the scene shown in FIG. 7 (c) in the process of the insertion operation, the guide inclined surfaces 32b and 32b of the male coupler 32 start to spread the flange-like fitting portions 22a and 22a of the female coupler 22, The connecting operation of the female connector 22 and the male connector 32 is started.
It should be noted that the start of the fitting of the female torque transmission shaft portion 21 and the male torque transmission shaft portion 31 and the start of the connection of the female connector 22 and the male connector 32 are not limited.
At the end point of the insertion operation process shown in FIG. 7 (d), that is, at the joining completion scene, the fitting between the female torque transmission shaft portion 21 and the male torque transmission shaft portion 31, the male restriction fitting portion 23 and The fitting with the female restriction fitting portion 33 and the connection between the female coupler 22 and the male coupler 32 are completed at the same time.

以上のようにして、2つの軸部材20,30が互いに同軸に、かつ、トルク伝達可能に接合される。このとき、連結器22,32により2つの軸部材20,30同士が軸方向に引き離れないように2つの軸部材20,30同士を連結する。
図7(c)(d)に示すように一対の連結器22,32は、オス型トルク伝達軸部31を受容したメス型トルク伝達軸部21の奥側に残る内部空間25で連結し、図7(d)に示すよう
に互いに接合した状態の2つの軸部材20,30の内部に収まるように設けられている。
したがって、オーガ軸5aの接合部を径方向に大型化することがない。また、以上のオーガ軸の接合構造によれば、オーガ軸5aの接合部に対する人手作業を要することなくオーガ軸5aを接合することができる。したがって、吊り込み揚程を抑えつつ、高所での人手作業も要することなくオーガ装置3を建て込むことができる。
As described above, the two shaft members 20 and 30 are joined coaxially to each other so as to be able to transmit torque. At this time, the two shaft members 20 and 30 are connected by the couplers 22 and 32 so that the two shaft members 20 and 30 are not pulled apart in the axial direction.
As shown in FIGS. 7 (c) and 7 (d), the pair of couplers 22 and 32 are coupled by an internal space 25 remaining on the back side of the female torque transmission shaft portion 21 that receives the male torque transmission shaft portion 31. As shown in FIG. 7 (d), the two shaft members 20 and 30 are provided so as to be fitted inside each other.
Therefore, the joint portion of the auger shaft 5a is not enlarged in the radial direction. Moreover, according to the above-mentioned auger shaft joining structure, the auger shaft 5a can be joined without requiring manual work for the joint portion of the auger shaft 5a. Therefore, the auger device 3 can be built without restraining the lifting head and without requiring manual work at a high place.

杭圧入施工にあたり、図1に示すようにオーガ軸5aを、杭圧入機1に保持された杭2b内に挿入された状態にオーガ装置3を建て込む。その際、横倒し状態で杭2bにオーガ5を挿入したものを一体で吊上げて杭圧入機1の杭チャック装置1aに建て込むことができる。
このオーガ装置の建て込み工程において、2つの軸部材20,30の一方の軸部材30を、先にクレーン6で吊って杭圧入機1及び杭2bによってサポートする形で地盤G上に建て込み、他方の軸部材20をクレーン6により吊り込み降下させることで上記の挿し込
み動作を実行する。これにより、一対の連結器22,32を互いに連結させて2つの軸部材20,30同士の接合を完了する。
すべての接合部の接合が完了し、オーガ装置3が組み上がったら、オーガ駆動部4を稼働させてオーガ5を回転駆動し、オーガ5によって地盤Gを掘削するオーガ掘削工法を実行する。このオーガ掘削工法を併用しつつ、杭圧入機1により杭2bを地盤Gに圧入し、杭2bの上端を計画レベル(通常は、隣接した既設杭2aの上端レベル)まで押し下げる。
In the pile press-in construction, the auger device 3 is installed in a state where the auger shaft 5a is inserted into the pile 2b held by the pile press-in machine 1 as shown in FIG. At that time, the one in which the auger 5 is inserted into the pile 2b in a sideways state can be lifted together and built into the pile chuck device 1a of the pile press-in machine 1.
In this auger installation process, one shaft member 30 of the two shaft members 20, 30 is first suspended on the ground G in a form that is suspended by the crane 6 and supported by the pile presser 1 and the pile 2b. The other shaft member 20 is suspended and lowered by the crane 6 to execute the above insertion operation. Thereby, a pair of couplers 22 and 32 are mutually connected, and joining of two shaft members 20 and 30 is completed.
When the joining of all the joining parts is completed and the auger apparatus 3 is assembled, the auger driving part 4 is operated, the auger 5 is rotationally driven, and the auger excavation method for excavating the ground G by the auger 5 is executed. While using this auger excavation method together, the pile presser 1 presses the pile 2b into the ground G and pushes the upper end of the pile 2b down to the planned level (usually the upper end level of the adjacent existing pile 2a).

次に、掘削に使用した2つの軸部材20,30を分離する工程につき説明する。
一つの方法としては、図8(a)に示されるピン24を外部から押すことでピン孔26か
ら抜き、図8(b)に示すように連結器22を下側軸部材30側に残したまま、2つの軸部
材20,30を軸方向に引き離して分離する。
この方法の場合、オーガ軸の接合構造として、一対の連結器22,32のうち少なくとも一方は、軸部材からの分離操作が外部から可能にされた構造を適用する。分離操作可能にする方の連結器は、図2(及び図11)に示すように軸部材20,30の分離状態で軸部材の内部空間に配置されている連結器(図2でメス型連結器22、図11でオス型連結器32)である。他方の連結器(図2でオス型連結器32、図11でメス型連結器22)の少なくとも嵌合部は、軸部材20,30の分離状態で軸部材の外部に露出して設けられる。
ピン24は、軸部材20の径方向に挿入されて連結器22を軸部材20に固定するものである。図8に示すように連結器22の基端部に設けられた孔26aと、軸部材20に設けられた孔26bとが連通してできるピン孔26にピン24を挿入して連結器22を軸部材20に固定することができる。ピン孔26は貫通したものであるので、ピン24の端面を外部から押すことでピン24を抜き去り、連結器22を軸部材20から分離させることができる。
以上のように、オーガ装置3の外部から操作して一対の連結器22,32のうちの一方の連結器22を、当該一方の連結器22が固定されていた一方の軸部材20から分離し、次に、他方の軸部材30及び一対の連結器22,32を、一方の軸部材20から軸方向に引き離して分離する。
杭2bの圧入が完了すると、オーガ軸5aの上端は、杭圧入機1と同じ程度に下がっているので、接合部10に対する操作が要求されても、比較的低所にて安全に行える。
再度、一対の連結器22,32を利用するために、図9に示すように連結器22と連結器32とを嵌合溝32aの方向に沿って相対的にスライドさせて、連結器22を連結器32及び下側軸部材30から分離する。分離した連結器22を上側軸部材20にピン24を用いて固定する。上記スライドが可能となるように、軸部材20,30の分離により一対の連結器22,32の双方が露出する構成とする。軸部材20,30の接合状態では、上記スライドは不能であるので、連結器22,32の連結が解かれることはなく安全である。
Next, the process of separating the two shaft members 20 and 30 used for excavation will be described.
As one method, the pin 24 shown in FIG. 8 (a) is pushed out from the pin hole 26 by pushing from the outside, and the coupler 22 is left on the lower shaft member 30 side as shown in FIG. 8 (b). The two shaft members 20 and 30 are separated in the axial direction as they are.
In the case of this method, as the auger shaft joining structure, at least one of the pair of couplers 22 and 32 adopts a structure in which the separation operation from the shaft member is enabled from the outside. As shown in FIG. 2 (and FIG. 11), the coupler that enables the separation operation is a coupler disposed in the inner space of the shaft member with the shaft members 20 and 30 separated (in FIG. 2, a female connection). 22 is a male connector 32) in FIG. At least the fitting portion of the other coupler (the male coupler 32 in FIG. 2 and the female coupler 22 in FIG. 11) is provided exposed to the outside of the shaft member in a state where the shaft members 20 and 30 are separated.
The pin 24 is inserted in the radial direction of the shaft member 20 to fix the coupler 22 to the shaft member 20. As shown in FIG. 8, the pin 22 is inserted into the pin hole 26 formed by communicating the hole 26a provided in the base end portion of the connector 22 and the hole 26b provided in the shaft member 20, and the connector 22 is connected. The shaft member 20 can be fixed. Since the pin hole 26 penetrates, the pin 24 can be removed by pushing the end face of the pin 24 from the outside, and the coupler 22 can be separated from the shaft member 20.
As described above, by operating from the outside of the auger device 3, one of the pair of couplers 22, 32 is separated from the one shaft member 20 to which the one coupler 22 is fixed. Next, the other shaft member 30 and the pair of couplers 22 and 32 are separated from the one shaft member 20 in the axial direction.
When the press-fitting of the pile 2b is completed, the upper end of the auger shaft 5a is lowered to the same extent as the pile press-fitting machine 1, so that even if an operation on the joint 10 is required, it can be safely performed at a relatively low place.
In order to use the pair of connectors 22 and 32 again, the connector 22 and the connector 32 are relatively slid along the direction of the fitting groove 32a as shown in FIG. Separate from the coupler 32 and the lower shaft member 30. The separated coupler 22 is fixed to the upper shaft member 20 using a pin 24. It is set as the structure which both a pair of couplers 22 and 32 expose by the isolation | separation of the shaft members 20 and 30 so that the said slide is possible. Since the slide is impossible in the joined state of the shaft members 20 and 30, the coupling of the couplers 22 and 32 is not broken and it is safe.

他の方法としては、図10に示すように一対の連結器22,32の連結を解除してから、軸部材20,30同士を分離する方法である。
この方法の場合、オーガ軸の接合構造として、一対の連結器22,32の連結解除操作が外部から可能にされた構造を適用する。
それには例えば図10に示す先細りのテーパー部41aを先端部に有した操作ロッド41を用いる。軸部材20に孔42を設けて操作ロッド41を軸部材20の径方向に進入させ、テーパー部41aにより連結器22の一対の嵌合部22a,22a間を押し広げて嵌合溝32a,32aからの嵌合部22a,22aの離脱を操作する。図8(b)に示すよう
に嵌合溝32a,32aから嵌合部22a,22aが離脱すれば、2つの軸部材20,30を軸方向に引き離して分離する。
以上のように、オーガ装置3の外部から操作して一対の連結器22,32同士の連結を
解除し、次に、2つの軸部材20,30同士を軸方向に引き離して分離する。
以上のようにして、2つの軸部材20,30同士を軸方向に引き離して互いに離脱させて分離可能である。
As another method, as shown in FIG. 10, the shaft members 20 and 30 are separated from each other after the connection between the pair of couplers 22 and 32 is released.
In the case of this method, a structure in which the connection release operation of the pair of couplers 22 and 32 is enabled from the outside is applied as the auger shaft joining structure.
For example, an operation rod 41 having a tapered portion 41a shown in FIG. The shaft member 20 is provided with a hole 42 so that the operating rod 41 enters the shaft member 20 in the radial direction, and the tapered portion 41a spreads between the pair of fitting portions 22a and 22a of the coupler 22 to fit the fitting grooves 32a and 32a. The detachment of the fitting portions 22a, 22a from the slab is operated. As shown in FIG. 8B, when the fitting portions 22a and 22a are detached from the fitting grooves 32a and 32a, the two shaft members 20 and 30 are separated in the axial direction.
As described above, the connection between the pair of couplers 22 and 32 is released by operating from the outside of the auger device 3, and then the two shaft members 20 and 30 are separated from each other in the axial direction.
As described above, the two shaft members 20 and 30 can be separated by being separated from each other in the axial direction.

なお、図2から図10に示したように以上の実施形態にあっては、メス型連結器22は上側軸部材20の下端部に設けられ、オス型の連結器32は下側軸部材30の上端部に設けられた。
しかし、図11に示すようにメス型連結器22が下側軸部材30の上端部に設けられ、オス型の連結器32が上側軸部材20の下端部に設けられた構成でも実施可能である。この場合、メス型連結器22が上向きになり、施工条件によっては、土砂などがメス型連結器22に溜まりやすい。これに対して図2から図10に示した構成では、メス型連結器22を下向きにして使用でき、土砂などがメス型連結器22に溜まりにくく、そのためメス型連結器22の良好な動作が続きやすく、メンテナンスも楽である。
As shown in FIGS. 2 to 10, in the above embodiment, the female connector 22 is provided at the lower end of the upper shaft member 20, and the male connector 32 is the lower shaft member 30. Provided at the upper end.
However, as shown in FIG. 11, a configuration in which the female connector 22 is provided at the upper end portion of the lower shaft member 30 and the male connector 32 is provided at the lower end portion of the upper shaft member 20 is also possible. . In this case, the female coupler 22 faces upward, and depending on the construction conditions, earth and sand are likely to accumulate in the female coupler 22. On the other hand, in the configuration shown in FIGS. 2 to 10, the female coupler 22 can be used with the female coupler 22 facing downward, so that dirt and the like are not easily collected in the female coupler 22, so that the female coupler 22 operates well. Easy to maintain and easy to maintain.

次に図1と図12を参照して本工法と従来工法とを比較する。
図1と図12に示すように、本工法と従来工法とでは用いる機材はほぼ同じであるが、従来工法においては、オーガ装置3Zのオーガ駆動部4Zの回転出力軸と、オーガ5Zのオーガ軸との接合部100は、上掲した従来技術(特許文献1参照)のように2つの軸部材同士をピンで直接的に固定するものである。
図12の従来工法において高所での接合作業を避けるため、地上でオーガ軸を横倒しにして接合する場合には、接合後に長大となったオーガ装置3Zを建て込まなければならないが、先に建て込まれた杭2bにオーガ5Zを挿入する場合には、既に組み上がったオーガ装置3Zの下端を杭2bの上端より高く吊り上げなければならない。したがって、吊り込み揚程が大きく、クレーン6の吊り上げ能力(揚程及び荷重)が高く要求される。またこの場合に、上部構造物(橋桁など)により高さ制限がある現場では、オーガ装置3Zを使用できなくなるおそれがある。
これに対し図1の本工法では、杭2bにオーガ5を挿入したものを一体で吊上げて杭圧入機1の杭チャック装置1aに建て込んだ後、オーガ駆動部4を吊り込み下降させることでオーガ5と接合して、接合部10に対する人手作業なしにオーガ装置3を組み上げる。
したがって、吊り荷重が小さくなるとともに、図1中に二点鎖線により示した従来工法によるオーガ装置3Zの最高吊り上げ位置より、吊り込み揚程を低くすることができる。従来工法と本工法との揚程の差は、杭2b中にオーガ5を挿入できる長さに相当する。したがって、杭2bが長くなるほど従来工法との揚程の差は大きくなる。
また、建て込んだ杭2bに対してオーガ5を吊り込み降下させて挿入すると、杭長+オーガ長分の高い吊り込み揚程が必要になるが、本工法によれば、杭2bにオーガ5を挿入したものを一体で吊上げて杭圧入機1の杭チャック装置1aに建て込むので、杭長が長くなり、オーガ長が長くなった場合においても、吊り込み揚程を抑えることが可能である。
本工法によれば吊り荷重及び揚程が小さく抑えられるので、従来工法に比較してより小型のクレーンで施工できる可能性が増加する。また本工法によれば従来工法に比較して、高さ制限がある現場、大型のクレーンを設置できない現場など、施工できる現場も増加する。
Next, referring to FIGS. 1 and 12, the present construction method and the conventional construction method will be compared.
As shown in FIG. 1 and FIG. 12, the equipment used in this method and the conventional method is almost the same, but in the conventional method, the rotation output shaft of the auger drive unit 4Z of the auger device 3Z and the auger shaft of the auger 5Z are used. The joint portion 100 is to directly fix two shaft members with pins as in the above-described prior art (see Patent Document 1).
In order to avoid joining work at a high place in the conventional method shown in FIG. 12, when joining the auger shaft on the ground sideways, the auger device 3Z that has become long after joining must be installed. When the auger 5Z is inserted into the pile 2b that has been inserted, the lower end of the already assembled auger device 3Z must be lifted higher than the upper end of the pile 2b. Therefore, the lifting lift is large and the lifting capacity (lift and load) of the crane 6 is required to be high. Further, in this case, there is a possibility that the auger device 3Z cannot be used at a site where the height is limited by the upper structure (such as a bridge girder).
On the other hand, in the present construction method of FIG. 1, the auger 5 inserted into the pile 2 b is lifted together and built in the pile chuck device 1 a of the pile press-in machine 1, and then the auger drive unit 4 is suspended and lowered. The auger device 3 is assembled without joining the auger 5 without manual work on the joint 10.
Therefore, the suspension load is reduced, and the lifting lift can be made lower than the highest lifting position of the auger device 3Z according to the conventional method shown by the two-dot chain line in FIG. The difference in lift between the conventional method and the main method corresponds to the length that allows the auger 5 to be inserted into the pile 2b. Therefore, the difference in the lift from the conventional method increases as the pile 2b becomes longer.
Moreover, if the auger 5 is suspended and inserted into the built-up pile 2b, a high lifting height corresponding to the pile length + auger length is required. According to this construction method, the auger 5 is attached to the pile 2b. Since the inserted object is integrally lifted and built in the pile chuck device 1a of the pile press-fitting machine 1, even when the pile length becomes long and the auger length becomes long, the lifting head can be suppressed.
According to the present construction method, the suspension load and the lift are kept small, so that the possibility of construction with a smaller crane is increased as compared with the conventional construction method. In addition, according to the present construction method, the number of sites that can be constructed increases, such as a site with a height restriction and a site where a large crane cannot be installed, as compared with the conventional method.

以上説明したように、本発明のオーガ軸の接合構造を適用すれば、作業員による高所での接合作業が不要となって安全であり、人為ミスもなく迅速、確実に接合でき、接合作業のための足場も不要である。
従来要した作業員による接合作業とクレーンによる吊り込みなどに対して、クレーン操作により接合が完了し、接合完了によりオーガ装置が組み上がるので、作業人員、作業工数及び作業時間の削減、工期の短縮が図られ、経済性に優れる。
上述したようにより小型のクレーンで施工できる可能性が増加して経済的であり、高さ制限がある現場、大型のクレーンを設置できない現場など、施工できる領域が拡大される
As described above, if the auger shaft joining structure of the present invention is applied, joining work at a high place by a worker is unnecessary, and it is safe and can be joined quickly and reliably without human error. No scaffolding is needed.
For joining work by workers and suspension by a crane, which has been required in the past, joining is completed by crane operation, and when the joining is completed, the auger device is assembled, reducing the number of workers, work man-hours and time, and shortening the work period And is economical.
As described above, the possibility of construction with a small crane is increased, which is economical, and the area where construction can be performed is expanded, such as a site where height is limited and a site where a large crane cannot be installed.

1 杭圧入機
1a 杭チャック装置
2a 既設杭
2b 杭
3 オーガ装置
4 オーガ駆動部
4a 回転出力軸
5 オーガ
5a オーガ軸
5b オーガスクリュー
5c オーガヘッド
6 クレーン
10 接合部
20 上側軸部材
21 メス型トルク伝達軸部
22 メス型連結器
22a 嵌合部
23 オス型規制嵌合部
24 ピン
25 内部空間
26 ピン孔
30 下側軸部材
31 オス型トルク伝達軸部
32 オス型連結器
32a 嵌合溝
32b 案内傾斜面
33 メス型規制嵌合部
G 地盤
DESCRIPTION OF SYMBOLS 1 Pile press-fit machine 1a Pile chuck apparatus 2a Existing pile 2b Pile 3 Auger apparatus 4 Auger drive part 4a Rotation output shaft 5 Auger 5a Auger shaft 5b Auger screw 5c Auger head 6 Crane 10 Joint part 20 Upper shaft member 21 Female type torque transmission shaft Part 22 female connector 22a fitting part 23 male type regulation fitting part 24 pin 25 internal space 26 pin hole 30 lower shaft member 31 male torque transmission shaft part 32 male connector 32a fitting groove 32b guide inclined surface 33 Female type regulation fitting part G Ground

Claims (11)

少なくともいずれか一方がオーガ軸を構成する2つの軸部材を軸方向に挿し込む挿し込み動作により嵌合させて互いに同軸に、かつ、トルク伝達可能に接合可能であり、前記2つの軸部材同士を軸方向に引き離して互いに離脱させて分離可能である構造を有するオーガ軸の接合構造であって、
前記挿し込み動作に連動して、前記2つの軸部材同士が軸方向に引き離れないように前記2つの軸部材同士を連結する一対の連結器が、互いに接合した状態の前記2つの軸部材の内部に収まるように設けられたオーガ軸の接合構造。
At least one of the two shaft members constituting the auger shaft is fitted by an insertion operation of inserting the two shaft members in the axial direction, and can be joined coaxially with each other so as to be able to transmit torque. An auger shaft joint structure having a structure that can be separated by being separated in the axial direction and separated from each other,
In conjunction with the insertion operation, a pair of couplers for connecting the two shaft members to each other so that the two shaft members are not pulled apart in the axial direction are connected to each other. Joint structure of auger shaft provided to fit inside.
前記連結器は、前記挿し込み動作に連動して弾性変形を経て嵌合する鉤状の嵌合部を有したオス、メス一対で構成された請求項1に記載のオーガ軸の接合構造。 2. The auger shaft joint structure according to claim 1, wherein the coupler is configured by a pair of males and females having a hook-like fitting portion that is fitted through elastic deformation in conjunction with the insertion operation. 前記2つの軸部材をトルク伝達可能に嵌合するオス、メス一対で構成され、メス型の内周面にオス型の外周面を嵌合させる構造のトルク伝達軸部を備え、
前記挿し込み動作の過程で、前記一対の連結器同士の接触及び前記一対のトルク伝達軸部同士の嵌合のいずれよりも先に、互いに嵌合を始める一対の規制嵌合部を有し、
前記一対のトルク伝達軸部の構造自体が嵌合可能な軸回りの複数の角度のうちの一部の角度で前記一対の連結器が連結可能であり、
前記一対の規制嵌合部が嵌合可能な角度が、前記一対の連結器が連結可能な角度に規制されている請求項1又は請求項2に記載のオーガ軸の接合構造。
A pair of male and female fitting the two shaft members so that torque can be transmitted, and a torque transmission shaft portion having a structure in which a male outer peripheral surface is fitted to a female inner peripheral surface,
In the course of the insertion operation, before any of the contact between the pair of couplers and the fitting of the pair of torque transmission shaft portions, a pair of restriction fitting portions that start fitting with each other,
The pair of couplers can be coupled at a part of a plurality of angles around an axis to which the structure of the pair of torque transmission shaft portions can be fitted;
The joint structure of an auger shaft according to claim 1 or 2, wherein an angle at which the pair of regulation fitting portions can be fitted is regulated to an angle at which the pair of couplers can be coupled.
前記規制嵌合部がオス、メス一対で構成され、
オス型の前記規制嵌合部は、メス型の前記トルク伝達軸部の周壁部の一周に満たない一部を、軸部材の先端側に延長した態様の突出部であり、
メス型の前記規制嵌合部は、オス型の前記トルク伝達軸部より軸部材の中央側に設けられ、前記突出部と嵌合するように外壁部の一部を切り欠いた切欠部である請求項3に記載のオーガ軸の接合構造。
The restriction fitting portion is composed of a male and a female pair,
The male restriction fitting portion is a protruding portion in a mode in which a part of the peripheral wall portion of the female torque transmission shaft portion that is less than one circumference is extended to the distal end side of the shaft member,
The female-type regulation fitting portion is a cutout portion that is provided closer to the center side of the shaft member than the male-type torque transmission shaft portion, and a part of the outer wall portion is cut away so as to be fitted to the protruding portion. The auger shaft joining structure according to claim 3.
前記一対の連結器の一方は、メス型の前記トルク伝達軸部を有する軸部材の内部空間であって、メス型の前記トルク伝達軸部の奥側に形成された内部空間に配置され、
前記一対の連結器の他方は、オス型の前記トルク伝達軸部を有する軸部材に固定され、オス型の前記トルク伝達軸部より先端側に配置され、
前記一対の連結器は、オス型の前記トルク伝達軸部を受容したメス型の前記トルク伝達軸部の奥側に残る内部空間で連結する請求項1から請求項4のうちいずれか一に記載のオーガ軸の接合構造。
One of the pair of connectors is an internal space of a shaft member having the female torque transmission shaft portion, and is disposed in an internal space formed on the inner side of the female torque transmission shaft portion,
The other of the pair of couplers is fixed to a shaft member having the male torque transmission shaft portion, and is disposed on the tip side from the male torque transmission shaft portion,
5. The pair of couplers are connected to each other in an internal space remaining on the back side of the female torque transmission shaft portion that receives the male torque transmission shaft portion. 6. Auger shaft joint structure.
前記連結器はオス、メス一対で構成され、メス型の前記連結器は軸部材の下端部に設けられ、オス型の前記連結器は軸部材の上端部に設けられた請求項1から請求項5のうちいずれか一に記載のオーガ軸の接合構造。 The said connector is comprised by a male and a female pair, The said female connector is provided in the lower end part of the shaft member, The male connector is provided in the upper end part of the shaft member. The auger shaft joining structure according to any one of 5. 前記一対の連結器のうち少なくとも一方は、軸部材からの分離操作が外部から可能にされた請求項1から請求項6のうちいずれか一に記載のオーガ軸の接合構造。 The auger shaft joining structure according to any one of claims 1 to 6, wherein at least one of the pair of couplers can be separated from the shaft member from the outside. 前記一対の連結器の連結解除操作が外部から可能にされた請求項1から請求項6のうちいずれか一に記載のオーガ軸の接合構造。 The connection structure of the auger shaft as described in any one of Claims 1-6 by which the connection cancellation | release operation of the said pair of coupler was enabled from the outside. 請求項1から請求項8のうちいずれか一に記載のオーガ軸の接合構造を備えたオーガ装置を建て込んで当該オーガ装置により地盤を掘削するオーガ掘削工法であって、
オーガ装置の建て込み工程において、前記2つの軸部材の一方を地盤上に建て込み、前記
2つの軸部材の他方を吊り込み降下させることで前記挿し込み動作を実行し、前記一対の連結器を互いに連結させて前記2つの軸部材同士の接合を完了するオーガ掘削工法。
An auger excavation method in which an auger apparatus having the auger shaft joining structure according to any one of claims 1 to 8 is built and excavated by the auger apparatus.
In the step of installing the auger device, one of the two shaft members is built on the ground, and the other of the two shaft members is suspended and lowered to execute the insertion operation, and the pair of connectors is An auger excavation method that completes the joining of the two shaft members by connecting them together.
請求項7に記載のオーガ軸の接合構造を備えたオーガ装置を建て込んで当該オーガ装置により地盤を掘削するオーガ掘削工法であって、
掘削に使用した前記2つの軸部材を分離する工程において、オーガ装置の外部から操作して前記一対の連結器のうちの一方を、当該一方が固定されていた一方の軸部材から分離し、次に、他方の軸部材及び前記一対の連結器を、前記一方の軸部材から軸方向に引き離して分離するオーガ掘削工法。
An auger excavation method in which an auger device having the auger shaft joining structure according to claim 7 is built and excavated by the auger device.
In the step of separating the two shaft members used for excavation, one of the pair of couplers is separated from the one shaft member on which the one is fixed by operating from the outside of the auger device, and And an auger excavation method in which the other shaft member and the pair of couplers are separated from each other by pulling away from the one shaft member in the axial direction.
請求項8に記載のオーガ軸の接合構造を備えたオーガ装置を建て込んで当該オーガ装置により地盤を掘削するオーガ掘削工法であって、
掘削に使用した前記2つの軸部材を分離する工程において、オーガ装置の外部から操作して前記一対の連結器同士の連結を解除し、次に、前記2つの軸部材同士を軸方向に引き離して分離するオーガ掘削工法。
An auger excavation method in which an auger device having the auger shaft joining structure according to claim 8 is built and excavated by the auger device.
In the step of separating the two shaft members used for excavation, the connection between the pair of couplers is released by operating from the outside of the auger device, and then the two shaft members are pulled apart in the axial direction. Ogre excavation method to separate.
JP2018092153A 2018-05-01 2018-05-11 Joint structure of auger shaft and auger excavation method Active JP7122859B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018087994 2018-05-01
JP2018087994 2018-05-01

Publications (2)

Publication Number Publication Date
JP2019194411A true JP2019194411A (en) 2019-11-07
JP7122859B2 JP7122859B2 (en) 2022-08-22

Family

ID=68469304

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2018092153A Active JP7122859B2 (en) 2018-05-01 2018-05-11 Joint structure of auger shaft and auger excavation method

Country Status (1)

Country Link
JP (1) JP7122859B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019203267A (en) * 2018-05-21 2019-11-28 日本ベース株式会社 Joint device between rotation transmission shaft and drilling shaft in drilling device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS604693U (en) * 1983-03-10 1985-01-14 日本コンクリ−ト工業株式会社 Joint structure of auger screw shaft, etc.
JPH10110449A (en) * 1996-10-07 1998-04-28 Giken Seisakusho Co Ltd Excavator and excavation construction method
JPH10169357A (en) * 1996-12-06 1998-06-23 Toshio Mukai Connector of soil-removing member for excavator
US20100044113A1 (en) * 2008-08-22 2010-02-25 Coiled Tubing Rental Tools, Inc. Connection for well bore drilling tools
JP2017048670A (en) * 2015-05-08 2017-03-09 株式会社技研製作所 Auger shaft connection structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS604693U (en) * 1983-03-10 1985-01-14 日本コンクリ−ト工業株式会社 Joint structure of auger screw shaft, etc.
JPH10110449A (en) * 1996-10-07 1998-04-28 Giken Seisakusho Co Ltd Excavator and excavation construction method
JPH10169357A (en) * 1996-12-06 1998-06-23 Toshio Mukai Connector of soil-removing member for excavator
US20100044113A1 (en) * 2008-08-22 2010-02-25 Coiled Tubing Rental Tools, Inc. Connection for well bore drilling tools
JP2017048670A (en) * 2015-05-08 2017-03-09 株式会社技研製作所 Auger shaft connection structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019203267A (en) * 2018-05-21 2019-11-28 日本ベース株式会社 Joint device between rotation transmission shaft and drilling shaft in drilling device

Also Published As

Publication number Publication date
JP7122859B2 (en) 2022-08-22

Similar Documents

Publication Publication Date Title
US10294623B2 (en) Interlocking, self-aligning and torque transmitting coupler assembly, systems and methods for connecting, installing, and supporting foundation elements
US11668063B2 (en) Steel pipe coupling device for steel pipes
US4212487A (en) Hose coupling
US11525232B2 (en) Modular foundation support systems and methods including shafts with interlocking torque transmitting couplings
KR102343201B1 (en) Connection structure of helical pile and extension pile
CA2917480C (en) Accessory connection systems and methods for use with helical pile driving systems
JP4753426B2 (en) Steel pipe joints
JP2019194411A (en) Auger shaft jointing structure and auger drilling method
KR200480999Y1 (en) Coulper of steel pipe pile for rotational intrusion and pullout
JP3135948U (en) Steel pipe pile joint structure
JP2018193707A (en) Drilling machine and drilling method for driving underground heat exchange pipe
CN216715394U (en) Old pipe joint separating device
JP7432926B2 (en) Steel pipe connection structure
KR20160001115U (en) Coulper of steel pipe pile for rotational intrusion and pullout
JP5039602B2 (en) Ground anchor recovery method and locking member
JP2004346660A (en) Pile
US20100071892A1 (en) Coiled Tubing Quick Connect
CN211228057U (en) Double-guide-beam main beam connecting pin shaft plugging device
JP7090480B2 (en) Connection structure and connection method of shield segment
JP2005002598A (en) Tie structure of prefabricated pile
JPH05141172A (en) Drill pipe coupler
JP2000290997A (en) Pile
JP2021110196A (en) Connection type rod and construction method of rotary pile with tip blade
CA3239577A1 (en) Modular foundation support systems and methods including shafts with interlocking, self-aligning and torque transmitting couplings
JPS6312230Y2 (en)

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20210405

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20220118

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20220119

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20220308

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: 20220719

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20220809

R150 Certificate of patent or registration of utility model

Ref document number: 7122859

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150