JP7050495B2

JP7050495B2 - Pile hole excavation rod with kneading tool

Info

Publication number: JP7050495B2
Application number: JP2018001589A
Authority: JP
Inventors: 好伸木谷
Original assignee: Mitani Sekisan Co Ltd
Current assignee: Mitani Sekisan Co Ltd
Priority date: 2018-01-10
Filing date: 2018-01-10
Publication date: 2022-04-08
Anticipated expiration: 2038-01-10
Also published as: JP2019120077A

Description

本発明は、杭穴掘削に際して、杭穴壁を練り付ける練り付け具付きの杭穴掘削ロッドに関する。 The present invention relates to a pile hole excavation rod with a kneading tool for kneading a pile hole wall when excavating a pile hole.

従来、杭穴掘削する際に、掘削ヘッドで掘削した杭穴壁に、掘削泥土を練り付けドラムで練り付けしていた。これにより、杭穴壁を均して、杭穴壁の崩壊を防止し、所定の径の杭穴を保形していた（特許文献１、２）。 Conventionally, when excavating a pile hole, excavated mud is kneaded with a drum to the pile hole wall excavated by the excavation head. As a result, the pile hole wall was leveled to prevent the pile hole wall from collapsing, and the pile hole having a predetermined diameter was kept in shape (Patent Documents 1 and 2).

特開２０１６－２２３０８０号公報Japanese Unexamined Patent Publication No. 2016-22380 特開２００４－３５３３０３号公報Japanese Unexamined Patent Publication No. 2004-353303

従来練り付けドラムの構造は、１つの練り付けドラムで練り付け径の変更ができず、１つの練り付けドラムで１つの練り付け径となっていた。これは、練り付けドラムの練り付け板に割と大きな練り付け圧力が加わり、また、１つの掘削ロッドで複数高さ（ロッドの長さ方向）に練り付けドラムが取り付けられていたため、これを操作する構造が難しかったことによる。さらに、掘削ヘッドの上方に練り付けドラムが位置するので、掘削径が変化してもその上方の練り付けドラムの練り付け径は未だ変化しない状況もあり、掘削径と練り付け径とが同一となるように連動させることもできなかった。 Conventionally, in the structure of the kneading drum, the kneading diameter cannot be changed by one kneading drum, and one kneading drum has one kneading diameter. This is because a relatively large kneading pressure is applied to the kneading plate of the kneading drum, and the kneading drum is attached to multiple heights (in the length direction of the rod) with one excavation rod, so this is operated. Because the structure to do was difficult. Furthermore, since the kneading drum is located above the excavation head, the kneading diameter of the kneading drum above it may not change even if the excavation diameter changes, and the excavation diameter and the kneading diameter are the same. I couldn't make it work together.

この発明は、地上からの操作で、前記練り付け板の水平方向の張り出し量を調整できる可変機構をロッド本体に設けて、これに練り付け板を取り付けたので、前記問題点を解決した。 In the present invention, the rod body is provided with a variable mechanism capable of adjusting the horizontal overhang amount of the kneading plate by operation from the ground, and the kneading plate is attached to the variable mechanism, thereby solving the above-mentioned problems.

即ちこの発明は、上端を掘削機に連結し、下端に掘削ヘッドを連結できる杭穴掘削用のロッド本体で、その外周に練り付け具を備え、以下のように構成したことを特徴とする練り付け具付きの杭穴掘削ロッドである。
(1) 前記練り付け具は、水平方向に移動可能な駆動部を前記ロッド本体の外周に装着し、前記駆動部に杭穴壁を練り付けできる練り付け板を配置した。
(2) 前記駆動部は、地上からの操作で、前記練り付け板の水平方向の張り出し量を調整できる可変機構を備えた。
(3) 前記駆動部および前記可変機構を以下(a)～(c)のように構成した。
(a)前記ロッド本体の外周に、前記ロッド本体の軸方向に沿って上下動できる前記摺動部材を取り付け、前記摺動部材に、地上からの操作で上下動可能な操作ロッドの下端を連結した。
(b) 前記ロッド本体の外周で、前記摺動部材の上方または下方に固定支点を設け、前記練り付け板を前記固定支点と前記摺動部材との中間高さに配置した。
(c) 前記摺動部材と前記練り付け板とを第一連結部材で回転自在に連結し、前記固定支点と前記練り付け板とを第二連結部材で回転自在に連結した。 That is, the present invention is characterized in that it is a rod body for excavating a pile hole whose upper end can be connected to an excavator and an excavation head can be connected to the lower end, and a kneading tool is provided on the outer periphery thereof and configured as follows. It is a pile hole excavation rod with a tool.
(1) In the kneading tool, a drive unit that can move in the horizontal direction is attached to the outer periphery of the rod body, and a kneading plate capable of kneading a pile hole wall is arranged in the drive unit .
(2) The drive unit is provided with a variable mechanism that can adjust the horizontal overhang amount of the kneading plate by operating from the ground.
(3) The driving unit and the variable mechanism are configured as follows (a) to (c).
(a) The sliding member that can move up and down along the axial direction of the rod body is attached to the outer circumference of the rod body, and the lower end of the operation rod that can move up and down by operation from the ground is connected to the sliding member. bottom.
(b) A fixed fulcrum was provided above or below the sliding member on the outer circumference of the rod body, and the kneading plate was arranged at an intermediate height between the fixed fulcrum and the sliding member.
(c) The sliding member and the kneading plate were rotatably connected by the first connecting member, and the fixed fulcrum and the kneading plate were rotatably connected by the second connecting member.

さらに、前記において、以下のようにして、練り付け具を構成した練り付け具付きの杭穴掘削ロッドである。
(1) 摺動部材と第一連結部材との連結、練り付け板と第一連結部材との連結、固定支点と第二連結部材との連結、および練り付け板とを第二連結部材との連結は、いずれもロッド本体の軸と直角でかつ略水平方向のピンで回転自在に連結した。
(2) 前記ロッド本体であって、前記第一連部材の中間位置に、前記第一保護部材が前記ピンの軸方向への移動を規制する第一保護部材を取り付けた。
(3) 前記ロッド本体であって、前記第二連部材の中間位置に、前記第二保護部材が前記ピンの軸方向への移動を規制する第二保護部材を取り付けた。 Further, in the above, it is a pile hole excavation rod with a kneading tool that constitutes the kneading tool as follows.
(1) Connection between the sliding member and the first connecting member, connection between the kneading plate and the first connecting member, connection between the fixed fulcrum and the second connecting member, and connection between the kneading plate and the second connecting member. All of the connections were rotatably connected with pins at right angles to the axis of the rod body and in a substantially horizontal direction.
(2) In the rod main body, a first protective member for restricting the axial movement of the pin by the first protective member was attached to an intermediate position of the first series member.
(3) In the rod main body, a second protective member for restricting the axial movement of the pin by the second protective member was attached to an intermediate position of the second continuous member.

この発明は、地上からの操作で、前記練り付け板の水平方向の張り出し量を調整できる可変機構を備えた駆動部をロッド本体に設けて、これに練り付け板を取り付けたので、小径の軸部を形成した杭穴で、底部や中間部あるいは地面付近に拡径部を有する杭穴で、軸部の穴壁のみならず拡径部の穴壁も効率よく練り付けできる。また、とりわけ、杭穴の拡径部の上端付近で、練り付け径を確認することにより、掘削径を確認できる。よって、杭穴の全長に亘り、穴壁の崩れを生じることなく、かつ設計通りの掘削径で、施工精度の高い杭穴を構築できる。 In the present invention, a drive unit having a variable mechanism capable of adjusting the horizontal overhang amount of the kneading plate by operation from the ground is provided on the rod body, and the kneading plate is attached to the drive unit, so that the shaft has a small diameter. It is a pile hole that forms a portion, and is a pile hole that has an enlarged diameter portion near the bottom, middle portion, or the ground, and can efficiently knead not only the hole wall of the shaft portion but also the hole wall of the enlarged diameter portion. Further, in particular, the excavation diameter can be confirmed by confirming the kneading diameter near the upper end of the enlarged diameter portion of the pile hole. Therefore, it is possible to construct a pile hole with high construction accuracy over the entire length of the pile hole without causing the hole wall to collapse and with the excavation diameter as designed.

この発明の掘削ロッドで、（ａ）は練り付け具の斜視図、（ｂ）（ｃ）小径掘削小径練り付け時の掘削ロッドの平面図、（ｂ）は同じく正面図、を表す。In the excavation rod of the present invention, (a) is a perspective view of a kneading tool, (b) (c) is a plan view of the excavation rod at the time of small diameter excavation and small diameter kneading, and (b) is also a front view. この発明の掘削ロッドで、（ａ）（ｂ）は大径掘削小径練り付け時の平面図および正面図、（ｃ）（ｄ）は大径掘削小径練り付け時の平面図および正面図、を表す。In the excavation rod of the present invention, (a) and (b) are a plan view and a front view at the time of large-diameter excavation and small-diameter kneading, and (c) and (d) are a plan view and a front view at the time of large-diameter excavation and small-diameter kneading. show. （ａ）～（ｃ）は、掘削ロッドで杭穴を掘削および練り付けをしている状態の概略した正面図を表す。(A) to (c) represent a schematic front view of a state in which a pile hole is excavated and kneaded with an excavation rod.

図面に基づいて、この発明の実施形態を説明する。 An embodiment of the present invention will be described with reference to the drawings.

１．掘削ロッド６０の構成 1. 1. Configuration of excavation rod 60

（１）円筒状のロッド本体１は、上端に凸連結部３、下端に凹連結部４を形成してある。上端の凸連結部３は、他のロッド本体１の凹連結部４、あるいは掘削機のオーガに連結できる構造となっており、下端の凹連結部４は、他のロッド本体１の凸連結部３、あるいは掘削ヘッド５０の凸連結部５４に連結できる構造となっている。ロッド本体１の長さ方向の中心軸をロッド軸５とする（図１）。
ロッド本体１の中間高さで、ロッド本体１の外周に摺動部材１０を、上下に摺動可能に、取り付ける。摺動部材１０は、四角柱形状の外観で、内側に、ロッド本体１の外周形状に対応した円形開口１１を形成してある。また、ロッド本体１の外周に、ロッド軸５に沿って縦凸条９が形成され、摺動部材１０の円形開口１１の内周面には、縦凸条９に対応した縦凹条１２が形成されている。縦凹条１２に縦凸条９が挿入されて、摺動部材１０は、縦凸条９に沿って、ロッド本体１を摺動できるようになっており、かつ摺動部材１０がロッド本体１の周りに回転することを制限している。
また、摺動部材１０の外周に、ロッド軸５対して放射状の連結凸片１３、１３を、板面を鉛直方向に合わせて、突設する。連結凸片１３、１３はロッド軸５に対して直径対称な位置に、放射状に２ヶ所設ける。 (1) The cylindrical rod body 1 has a convex connecting portion 3 at the upper end and a concave connecting portion 4 at the lower end. The convex connecting portion 3 at the upper end has a structure that can be connected to the concave connecting portion 4 of the other rod body 1 or the auger of the excavator, and the concave connecting portion 4 at the lower end is the convex connecting portion of the other rod body 1. 3 or the structure is such that it can be connected to the convex connecting portion 54 of the excavation head 50. The central axis of the rod body 1 in the length direction is the rod axis 5 (FIG. 1).
At an intermediate height of the rod body 1, a sliding member 10 is slidably attached to the outer periphery of the rod body 1 so as to be slidable up and down. The sliding member 10 has a quadrangular prism shape, and has a circular opening 11 formed inside the rod body 1 corresponding to the outer peripheral shape of the rod body 1. Further, vertical ridges 9 are formed on the outer periphery of the rod body 1 along the rod shaft 5, and vertical ridges 12 corresponding to the vertical ridges 9 are formed on the inner peripheral surface of the circular opening 11 of the sliding member 10. It is formed. A vertical convex strip 9 is inserted into the vertical concave strip 12, so that the sliding member 10 can slide the rod main body 1 along the vertical convex strip 9, and the sliding member 10 is the rod main body 1. Restricts rotation around.
Further, on the outer periphery of the sliding member 10, connecting convex pieces 13 and 13 radial to the rod shaft 5 are projected so as to align the plate surface in the vertical direction. The connecting convex pieces 13 and 13 are provided at two locations radially symmetrical with respect to the rod shaft 5.

（２）ロッド本体１で、摺動部材１０の上方に、固定支点１６を設定して、固定支点１６に、連結凸片１３、１３と面を合わせて、固定凸片１７、１７を突設する。したがって、固定凸片１７、１７もロッド軸５に直径対称な位置に、放射状に配置される。
固定支点１６（固定凸片１７、１７）と摺動部材１０（連結凸片１３、１３）との中間位置に、練り付け板２０を配置する。練り付け板２０は、練り付け対象の杭穴壁に対応した（ロッド軸５から放射方向に凸の）練り付け曲面２１を有し、練り付け板１０の内面にロッド本体１の外周面に当接する支持凸板２２を連結してある。支持凸板２２は板面が連結凸片１３、固定凸片１７と同一平面にある鉛直方向に配置されている。
練り付け板２０（支持凸板２２）は、最小径練り付け径の場合には、支持凸板２２の先端２３がロッド本体１の外面に当接している。大径練り付けの際には、練り付け板２０（支持凸板２２）はロッド軸５から放射方向に移動して、支持凸板２２に先端２３がロッド本体１から離れるように移動する（図２（ｃ）（ｄ））。 (2) In the rod body 1, a fixed fulcrum 16 is set above the sliding member 10, and the fixed fulcrum 16 is provided with the fixed convex pieces 17 and 17 so as to face the connecting convex pieces 13 and 13. do. Therefore, the fixed convex pieces 17 and 17 are also radially arranged at positions symmetrical with respect to the rod shaft 5.
The kneading plate 20 is arranged at an intermediate position between the fixed fulcrum 16 (fixed convex pieces 17, 17) and the sliding member 10 (connecting convex pieces 13, 13). The kneading plate 20 has a kneading curved surface 21 (convex in the radial direction from the rod shaft 5) corresponding to the pile hole wall to be kneaded, and hits the inner surface of the kneading plate 10 with the outer peripheral surface of the rod body 1. The supporting convex plates 22 in contact with each other are connected. The support convex plate 22 is arranged in the vertical direction in which the plate surface is in the same plane as the connecting convex piece 13 and the fixed convex piece 17.
In the case of the kneading plate 20 (support convex plate 22) having the minimum diameter kneading diameter, the tip 23 of the support convex plate 22 is in contact with the outer surface of the rod body 1. During large-diameter kneading, the kneading plate 20 (support convex plate 22) moves in the radial direction from the rod shaft 5, and the tip 23 moves away from the rod body 1 on the support convex plate 22 (FIG. 2 (c) (d)).

（３）摺動部材１０の各連結凸片１３、１３と、各練り付け板２０の支持凸板２２の基端部２４（練り付け板２０に近い側）とを、第一連結部材２５の両端部でそれぞれ連結する。第一連結部材２５と連結凸片１３、支持凸板２２との連結は、水平方向のピン２６、２６で回転自在に連結されている。
また、各固定凸片１７、１７と、各練り付け板２０、２０の支持凸板２２の基端部２４（練り付け板２０に近い側）の固定支点１７側とを、第二連結部材２８の両端部でそれぞれ連結する。第二連結部材２８、２８と固定凸片１７、１７、支持凸板２２との連結は、水平方向のピン２９、２９で回転自在に連結されている。 (3) The connecting convex pieces 13 and 13 of the sliding member 10 and the base end portion 24 (the side close to the kneading plate 20) of the support convex plate 22 of each kneading plate 20 are attached to the first connecting member 25. Connect at both ends. The connection between the first connecting member 25, the connecting convex piece 13, and the supporting convex plate 22 is rotatably connected by the pins 26 and 26 in the horizontal direction.
Further, the fixed convex pieces 17 and 17 and the fixed fulcrum 17 side of the base end portion 24 (the side close to the kneading plate 20) of the support convex plates 22 of the kneading plates 20 and 20 are connected to the second connecting member 28. Connect at both ends of. The second connecting members 28, 28 and the fixed convex pieces 17, 17, and the support convex plate 22 are rotatably connected by the pins 29, 29 in the horizontal direction.

（４）ロッド軸５方向で、第一連結部材２５の中間付近を挟むように、かつロッド軸５に直角に、水平方向の第一保護部材３１、３１を、ロッド本体１の外周に固定する。第一保護部材３１、３１はロッド軸５に対して直径対称な位置に配置されている。また、第一保護部材３１、３１は、並列して水平に配置した第一保護部材片３１ａ、３１ａからなり、第一保護部材片３１ａはその基端をロッド本体１に固定し、第一保護部材片３１ａの先端部は、両側から第一連結部材２５の中間部を挟む位置に配置される。また、両第一保護部材片３１ａ、３１ａを略水平方向の補強片３２、３２で一体に連結固定し、両第一保護部材片３１ａ、３１ａの先端部の間が、第一連結部材貫通部３３を形成する。
また、ロッド軸５方向で、第二連結部材２８の中間付近を挟むように、かつロッド軸５に直角に、水平方向の第二保護部材３５、３５を、ロッド本体１の外周に固定する。第二保護部材３５、３５はロッド軸５に対して、直径対称な位置に配置されている。また、第二保護部材３５は、並列して水平に配置した第二保護部材片３５ａ、３５ａからなり、第二保護部材片３５ａ、３５ａはその基端をロッド本体１に固定し、第二保護部材片３５ａ、３５ａの先端部は、両側から第二連結部材２８の中間部を挟む位置に配置される。また、両第二保護部材片３５ａ、３５ａを略水平方向の補強片３６、３６で一体に連結固定し、両第二保護部材片３５ａ、３５ａの先端部、両補強片３６、３６の間の開口が、第二保護部材貫通部３７を形成する。 (4) The first protective members 31 and 31 in the horizontal direction are fixed to the outer periphery of the rod body 1 so as to sandwich the vicinity of the middle of the first connecting member 25 in the rod shaft 5 direction and at a right angle to the rod shaft 5. .. The first protective members 31, 31 are arranged at positions symmetrical with respect to the rod shaft 5. Further, the first protective member pieces 31 and 31 are composed of first protective member pieces 31a and 31a arranged horizontally in parallel, and the first protective member piece 31a has its base end fixed to the rod body 1 to provide first protection. The tip portion of the member piece 31a is arranged at a position sandwiching the intermediate portion of the first connecting member 25 from both sides. Further, both first protective member pieces 31a and 31a are integrally connected and fixed by reinforcing pieces 32 and 32 in the substantially horizontal direction, and the space between the tips of both first protective member pieces 31a and 31a is the first connecting member penetrating portion. Form 33.
Further, the second protective members 35, 35 in the horizontal direction are fixed to the outer periphery of the rod body 1 so as to sandwich the vicinity of the middle of the second connecting member 28 in the direction of the rod shaft 5 and at right angles to the rod shaft 5. The second protective members 35, 35 are arranged at positions symmetrical with respect to the rod shaft 5. Further, the second protective member 35 is composed of second protective member pieces 35a and 35a arranged horizontally in parallel, and the second protective member pieces 35a and 35a have their base ends fixed to the rod body 1 to protect the second protective member 35a and 35a. The tip portions of the member pieces 35a and 35a are arranged at positions sandwiching the intermediate portion of the second connecting member 28 from both sides. Further, both second protective member pieces 35a and 35a are integrally connected and fixed by reinforcing pieces 36 and 36 in a substantially horizontal direction, and between the tip portions of both second protective member pieces 35a and 35a and both reinforcing pieces 36 and 36. The opening forms the second protective member penetration portion 37.

（５）ロッド軸５方向で、練り付け板２０が配置された高さ（第一保護部材３１と第二保護部材３５との中間高さ）で、ロッド本体１の外面に、第一保護部材３１と第二保護部材３５とに沿った平行に、第三保護部材４０、４０を固定する。第三保護部材４０、４０はロッド軸５に対して直径対称な位置に配置されている。また、第三保護部材４０、４０は、並列して水平方向に配置した第三保護部材片４０ａ、４０ａからなり、第三保護部材片４０ａ、４０ａは、その基端をロッド本体１に固定されている。また、第三保護部材片４０ａ、４０ａは、練り付け板２０の支持凸板２２を挟むように配置され、第三保護部材片４０ａ、４０ａの間に支持凸板挿入スリット４１を構成する。練り付け板２０がロッド軸５に対して、放射方向または求心方向に移動する際、支持凸板２２が常に支持凸板挿入スリット４１内に位置して、練り付け板２０が移動の際にぶれないように案内する。 (5) At the height at which the kneading plate 20 is arranged (intermediate height between the first protective member 31 and the second protective member 35) in the rod shaft 5 direction, the first protective member is placed on the outer surface of the rod body 1. The third protective members 40 and 40 are fixed in parallel with the 31 and the second protective member 35. The third protective members 40, 40 are arranged at positions symmetrical with respect to the rod shaft 5. Further, the third protective member pieces 40, 40 are composed of third protective member pieces 40a, 40a arranged in parallel in the horizontal direction, and the base ends of the third protective member pieces 40a, 40a are fixed to the rod body 1. ing. Further, the third protective member pieces 40a and 40a are arranged so as to sandwich the support convex plate 22 of the kneading plate 20, and form a support convex plate insertion slit 41 between the third protective member pieces 40a and 40a. When the kneading plate 20 moves in the radial direction or the centripetal direction with respect to the rod shaft 5, the support convex plate 22 is always located in the support convex plate insertion slit 41, and the kneading plate 20 shakes when moving. I will guide you not to.

（６）また、第一保護部材３１（第一保護部材片３１ａ、３１ａ）と第三保護部材３５（第三保護部材片３５ａ、３５ａ）とを縦方向の縦補強片４３、４３で一体に連結固定する。また、第三保護部材３５（第三保護部材片３５ａ、３５ａ）と第二保護部材３５（第二保護部材片３５ａ、３５ａ）とを縦方向の縦補強片４４、４４で一体に連結する（図１）。 (6) Further, the first protective member 31 (first protective member pieces 31a, 31a) and the third protective member 35 (third protective member pieces 35a, 35a) are integrally formed by the vertical reinforcing pieces 43, 43 in the vertical direction. Connect and fix. Further, the third protective member 35 (third protective member piece 35a, 35a) and the second protective member 35 (second protective member piece 35a, 35a) are integrally connected by the vertical reinforcing pieces 44, 44 in the vertical direction (the third protective member piece 35a, 35a). Figure 1).

（７）ロッド本体１の外面で、ロッド軸５に沿って、操作ロッド４７を配置して、操作ロッド４７の下端を摺動部材１０に連結する。操作ロッド４７の上端部４８は、ロッド本体１を他のロッド本体１と連結する際に、操作ロッド４７、４７同士も連結するための連結部４８を形成してある。なお、下方に他のロッド本体１を連結する位置で使用するロッド本体１では、凹部連結部４の付近に、下方の操作ロッド４７の連結部４８と繋ぐための連結部を形成してある（図示していない）。
また、操作ロッド４７は、ロッド軸５に対して、連結凸板１３、固定凸板１７、支持凸板２２の設置した側に対して、直角の方向に配置される。
また、操作ロッド４７は、一つの摺動部材１０について、ロッド軸５に対して、直径対称な位置に２本配置する（図１（ｂ））。 (7) On the outer surface of the rod body 1, the operation rod 47 is arranged along the rod shaft 5, and the lower end of the operation rod 47 is connected to the sliding member 10. The upper end portion 48 of the operating rod 47 forms a connecting portion 48 for connecting the operating rods 47 and 47 to each other when the rod main body 1 is connected to the other rod main body 1. In the rod main body 1 used at the position where the other rod main body 1 is connected downward, a connecting portion for connecting to the connecting portion 48 of the lower operating rod 47 is formed in the vicinity of the concave connecting portion 4 ( Not shown).
Further, the operating rod 47 is arranged in a direction perpendicular to the rod shaft 5 and the side on which the connecting convex plate 13, the fixed convex plate 17, and the support convex plate 22 are installed.
Further, two operating rods 47 are arranged at positions symmetrical with respect to the rod shaft 5 for one sliding member 10 (FIG. 1 (b)).

（８）以上のようにして、この発明の杭穴掘削ロッド６０を構成する（図１（ａ）（ｂ）（ｃ））。
なお、摺動部材１０、操作ロッド４７、練り付け板２０、第一第二連結部材２５、２８、第一第二第三保護部材３１、３５、４０などを合わせて練り付け具５８とする。また、練り付け具５８は、１つのロッド本体１に対して複数個設けることもできる（図示していない）。
また、練り付け板２０を支える支持凸板２２、摺動部材１０、支持支点１６の固定凸片１７および第一第二連結部材２５、２８などから駆動部を構成する。 (8) As described above, the pile hole excavation rod 60 of the present invention is configured (FIGS. 1 (a), (b) and (c)).
The sliding member 10, the operation rod 47, the kneading plate 20, the first and second connecting members 25 and 28, the first and second and third protective members 31, 35, 40 and the like are combined to form the kneading tool 58. Further, a plurality of kneading tools 58 may be provided for one rod body 1 (not shown).
Further, the drive unit is composed of a support convex plate 22 that supports the kneading plate 20, a sliding member 10, a fixed convex piece 17 of the support fulcrum 16, and first and second connecting members 25 and 28.

２．杭穴掘削ロッド６０の使用 2. 2. Use of pile hole excavation rod 60

（１）この実施に使用する掘削ヘッド５０は、凹連結部４と連結できる凸連結部５４を有するヘッド本体５１に、揺動自在の掘削腕５５、５５を取り付けて構成する（図１（ｃ））。この掘削ヘッド５０は、掘削腕５５の下端に備えた掘削刃５６、５６と、ヘッド本体５１の固定掘削刃５２、５２とで杭穴を掘削でき、掘削腕５５は、水平軸５３周りに回動して揺動角度を変化させることができる。この掘削腕５６、５６の揺動角度に応じて、掘削径を変化させることができる。
なお、使用する掘削ヘッド５０は、掘削径を変化させることができれば、その構造は任意である。 (1) The excavation head 50 used for this implementation is configured by attaching swingable excavation arms 55 and 55 to a head main body 51 having a convex connecting portion 54 that can be connected to the concave connecting portion 4 (FIG. 1 (c). )). The excavation head 50 can excavate a pile hole with the excavation blades 56 and 56 provided at the lower end of the excavation arm 55 and the fixed excavation blades 52 and 52 of the head main body 51, and the excavation arm 55 rotates around the horizontal axis 53. It can be moved to change the swing angle. The excavation diameter can be changed according to the swing angles of the excavation arms 56 and 56.
The structure of the excavation head 50 to be used is arbitrary as long as the excavation diameter can be changed.

（２）杭穴掘削ロッド６０の下端の凹連結部４に、掘削ヘッド５０の凸連結部５４を連結して、杭穴掘削ロッド６０の上端の凸連結部３を掘削機のオーガ（（図示していない）に連結する。掘削ヘッド５０を掘削径Ｄ１の軸部掘削モードに設定して、オーガを回転させながら下降して、杭穴掘削ロッド６０を下降して、地面６２から径Ｄ１の杭穴軸部６４を掘削する（図３（ａ）、図１（ｂ）（ｃ））。
この際、杭穴掘削ロッド６０はＤ１の最小練り付けモードにしてあり、摺動部材１０は最も下がった位置にあり、練り付け板２０の支持凸板２２の先端２３は、ロッド本体１の外面に当接している（図１（ｂ）（ｃ））。最小張り出し量）。したがって、練り付け板２０の練り付け曲面２１は径Ｄ１の杭穴の軸部６４の側壁を練り付けて均しながら、杭穴掘削ロッド６０とともに下降する（図３（ａ））。
また、この際、杭穴掘削ロッド６０は、通常単位長さ１０ｍ程度であり、杭穴の深さに応じて適宜、凸連結部３（上端部）に他の杭穴掘削ロッド６０（ロッド本体１）の凹連結部４（下端部）を連結する。また、連結Ｂに際して、上下の杭穴掘削ロッド６０（ロッド本体１）で、操作ロッド４７、４７も連結部４８で連結する。
また、この際、練り付け板２０がある程度の圧力で杭穴の側壁を練り付けるので、第一連結部材２５、第二連結部材２８および支持凸板２２で、ピン２６、２９方向に、たわみやねじれが生じるが、それぞれ、第一保護部材３１、第二保護部材、第三保護部材で両側から挟まれているので、大きな負荷が生じることを防止している。 (2) The convex connecting portion 54 of the excavation head 50 is connected to the concave connecting portion 4 at the lower end of the pile hole excavation rod 60, and the convex connecting portion 3 at the upper end of the pile hole excavation rod 60 is an auger of the excavator ((Fig.). (Not shown). The excavation head 50 is set to the shaft excavation mode of the excavation diameter D1, the auger is rotated and descended, the pile hole excavation rod 60 is descended, and the excavation rod 60 is descended from the ground 62 to the diameter D1. The pile hole shaft portion 64 is excavated (FIGS. 3 (a) and 1 (b) (c)).
At this time, the pile hole excavation rod 60 is set to the minimum kneading mode of D1, the sliding member 10 is in the lowest position, and the tip 23 of the support convex plate 22 of the kneading plate 20 is the outer surface of the rod body 1. (FIGS. 1 (b) and (c)). Minimum overhang amount). Therefore, the kneading curved surface 21 of the kneading plate 20 descends together with the pile hole excavation rod 60 while kneading and leveling the side wall of the shaft portion 64 of the pile hole having the diameter D1 (FIG. 3A).
Further, at this time, the pile hole excavation rod 60 is usually about 10 m in unit length, and another pile hole excavation rod 60 (rod main body) is appropriately connected to the convex connecting portion 3 (upper end portion) according to the depth of the pile hole. The concave connecting portion 4 (lower end portion) of 1) is connected. Further, at the time of connection B, the operation rods 47 and 47 are also connected by the connecting portion 48 by the upper and lower pile hole excavation rods 60 (rod body 1).
Further, at this time, since the kneading plate 20 kneads the side wall of the pile hole with a certain pressure, the first connecting member 25, the second connecting member 28, and the support convex plate 22 are bent in the pin 26 and 29 directions. Although twisting occurs, it is sandwiched between the first protective member 31, the second protective member, and the third protective member from both sides, respectively, so that a large load is prevented from being generated.

（３）また、この際、練り付け板２０を設けた杭穴掘削ロッド６０が複数ある場合（あるいは、杭穴掘削ロッド６０の複数高さに練り付け板２０、２０があった場合）、練り付け板２０毎（摺動部材１０毎）に操作ロッド４７、４７が設けられ、各練り付け板２０毎（摺動部材１０毎）の操作ロッド４、４７が地上に至っている（図３（ｃ）参照）。
したがって、杭穴掘削ロッド６０を繋ぐ際には、下方に複数の練り付け板２０があれば、それに応じて操作ロッド４７、４７があり、総ての操作ロッド４７、４７を繋ぐことになる。 (3) At this time, when there are a plurality of pile hole excavation rods 60 provided with the kneading plates 20 (or when there are kneading plates 20 and 20 at a plurality of heights of the pile hole excavation rods 60), kneading is performed. Operation rods 47 and 47 are provided for each attachment plate 20 (for each sliding member 10), and operation rods 4 and 47 for each kneading plate 20 (for each sliding member 10) reach the ground (FIG. 3 (c). )reference).
Therefore, when connecting the pile hole excavation rods 60, if there are a plurality of kneading plates 20 below, there are operating rods 47 and 47 accordingly, and all the operating rods 47 and 47 are connected.

（４）杭穴の軸部６４の掘削が完了したならば、続いて、所定深さから掘削ロッド６０（オーガ）を逆回転して、掘削ヘッド５０の掘削腕５５、５５の揺動を拡大モードして、径Ｄ２（＞Ｄ１）で杭穴の拡底部６５を掘削する（図２（ｂ））。この際、杭穴掘削ロッド６０の練り付け板２０は未だ径Ｄ１の杭穴の軸部６４内にあるので、練り付け板２０の練り付け径はＤ１のままとなっている（図２（ａ）（ｂ））。 (4) After the excavation of the shaft portion 64 of the pile hole is completed, the excavation rod 60 (auger) is subsequently rotated in the reverse direction from a predetermined depth to expand the swing of the excavation arms 55 and 55 of the excavation head 50. In the mode, the expanded bottom portion 65 of the pile hole is excavated with the diameter D2 (> D1) (FIG. 2 (b)). At this time, since the kneading plate 20 of the pile hole excavation rod 60 is still in the shaft portion 64 of the pile hole having the diameter D1, the kneading diameter of the kneading plate 20 remains D1 (FIG. 2 (a). ) (B)).

（５）杭穴掘削ロッド６０の練り付け板２０が径Ｄ２の杭穴の拡底部６５内に入ったならば（図３（ｂ））、杭穴掘削ロッド６０に対して、操作ロッド４７、４７を地上６２から引き上げる。操作ロッド４７、４７の引き上げにより、杭穴掘削ロッド６０（ロッド本体１）に対して、摺動部材１０も上側に移動して、伴い、第一連結部材２５および第二連結部材２８は傾斜角度が大きくなるように起きあがり、練り付け板２０は練り付け板２０と一緒にロッド軸５から放射方向に移動して、支持凸板２２の先端２３はロッド本体１から離れ、練り付け板２０はＤ２の練り付け径となる（図１（ａ）、図２（ｃ）（ｄ）。最大張り出し量）。この際、第一連結部材２５、第二連結部材２８、および支持凸板２２は、それそれ、第一保護部材３１、第二保護部材３５、第三保護部材４０で両側から挟まれているので、各部材２５、２８、２２などの滑らかで速やかな移動・変化を案内できる。 (5) If the kneading plate 20 of the pile hole excavation rod 60 enters the bottom expansion portion 65 of the pile hole having a diameter D2 (FIG. 3B), the operation rod 47, with respect to the pile hole excavation rod 60, Pull 47 up from 62 above the ground. By pulling up the operation rods 47 and 47, the sliding member 10 also moves upward with respect to the pile hole excavation rod 60 (rod body 1), and the first connecting member 25 and the second connecting member 28 are tilted at an angle. The kneading plate 20 moves in the radial direction from the rod shaft 5 together with the kneading plate 20, the tip 23 of the support convex plate 22 is separated from the rod body 1, and the kneading plate 20 is D2. (Fig. 1 (a), Fig. 2 (c) (d). Maximum overhang amount). At this time, the first connecting member 25, the second connecting member 28, and the support convex plate 22 are sandwiched between the first protective member 31, the second protective member 35, and the third protective member 40 from both sides. , Smooth and rapid movement / change of each member 25, 28, 22 and the like can be guided.

（６）また、練り付け板２０を設けた掘削ロッド６０が複数ある場合（掘削ロッド６０の複数高さに練り付け板２０があった場合）、拡底部６５に至った練り付け板２０毎（摺動部材毎）に、操作ロッド４７を地上６２で操作して、順次、練り付け径をＤ２に設定する（図３（ｃ）（ｄ））。
この杭穴掘削ロッド６０での掘削および練り付けにより、径Ｄ１の軸部６４、径Ｄ２の拡底部６５を有する杭穴が精度良く掘削できる。とりわけ、比較的崩壊しやすい地盤を通過した杭穴の場合には、杭穴壁の壊れを未然に防止できる。 (6) When there are a plurality of excavation rods 60 provided with the kneading plates 20 (when there are kneading plates 20 at a plurality of heights of the excavation rods 60), each kneading plate 20 reaching the bottom expansion portion 65 (when there are kneading plates 20 at a plurality of heights of the excavation rods 60). For each sliding member), the operation rod 47 is operated on the ground 62, and the kneading diameter is sequentially set to D2 (FIGS. 3 (c) and 3 (d)).
By excavating and kneading with the pile hole excavation rod 60, a pile hole having a shaft portion 64 having a diameter D1 and a bottom expansion portion 65 having a diameter D2 can be excavated with high accuracy. In particular, in the case of a pile hole that has passed through the ground that is relatively liable to collapse, it is possible to prevent the pile hole wall from breaking.

（７）所定の深さまで杭穴を掘削したならば、掘削ヘッド５０の下端からセメントミルクを放出しながら、杭穴掘削ロッド６０を回転しながら引き上げる。この際、径Ｄ２に広げた練り付け板２０が杭穴の軸部６４の直下に至った段階で、地上６２から杭穴掘削ロッド６０（ロッド本体１）に対して操作ロッド４７を押し下げて、ロッド本体１に対して摺動部材１０を下げて、第一連結部材２５、第二連結部材２８、支持凸板２２を当初の位置に戻す（図２（ａ）（ｂ）参照）。この際、練り付け板２０を広げる時と同様に、第一連結部材２５、第二連結部材２８、支持凸板２２は、第一保護部材３１、第二保護部材および第三保護部材で両側から挟まれているので、各部材２２、２５、２８の滑らかで速やかな移動・変化を案内する。
したがって、杭穴掘削ロッド６０を引き上げながら、杭穴の拡底部６５、軸部６４が、各練り付け板２０、２０により練り付けられる。 (7) After excavating the pile hole to a predetermined depth, the pile hole excavation rod 60 is pulled up while rotating while discharging cement milk from the lower end of the excavation head 50. At this time, when the kneading plate 20 spread to the diameter D2 reaches directly under the shaft portion 64 of the pile hole, the operation rod 47 is pushed down from the ground 62 against the pile hole excavation rod 60 (rod body 1). The sliding member 10 is lowered with respect to the rod body 1, and the first connecting member 25, the second connecting member 28, and the support convex plate 22 are returned to their original positions (see FIGS. 2A and 2B). At this time, as in the case of unfolding the kneading plate 20, the first connecting member 25, the second connecting member 28, and the support convex plate 22 are the first protective member 31, the second protective member, and the third protective member from both sides. Since it is sandwiched, it guides the smooth and rapid movement / change of each member 22, 25, 28.
Therefore, while pulling up the pile hole excavation rod 60, the bottom expansion portion 65 and the shaft portion 64 of the pile hole are kneaded by the kneading plates 20 and 20.

（８）なお、練り付け板２０の径Ｄ２から径Ｄ１への縮径は、各練り付け板２０、２０が、杭穴の拡径部６５から杭穴の軸部６４に入る直前に実行することが好ましいが、全部の練り付け板２０をまとめて操作することもできる。 (8) The diameter reduction of the kneading plate 20 from the diameter D2 to the diameter D1 is executed immediately before the kneading plates 20 and 20 enter the pile hole shaft portion 64 from the pile hole diameter expansion portion 65. It is preferable, but it is also possible to operate all the kneading plates 20 at once.

（９）また、以上のようにして、杭穴掘削ロッド６０（掘削ヘッド５０を含む）を地上６２に引き上げたならば、従来と同様に、セメントミルクなどで満たされた杭穴内に既製杭を埋設する（図示していない）。 (9) Further, if the pile hole excavation rod 60 (including the excavation head 50) is pulled up to the ground 62 as described above, the ready-made pile is placed in the pile hole filled with cement milk or the like as in the conventional case. Buried (not shown).

３．他の実施形態 3. 3. Other embodiments

（１）前記実施形態において、ロッド本体１に掘削ヘッド５０の凸連結部５３に連結する凹連結部４を形成したが、最下端に使用するロッド本体１や充分に長いロッド本体１では、ロッド本体１の下端部に、直接に、掘削ヘッド５０を形成することもできる（図示していない）。 (1) In the above embodiment, the rod main body 1 is formed with a concave connecting portion 4 to be connected to the convex connecting portion 53 of the excavation head 50. The excavation head 50 can also be formed directly at the lower end of the main body 1 (not shown).

（２）また、前記実施形態において、摺動部材１０の上方に固定支点１６（固定凸片１７、１７）を設けたが、摺動部材１０の下方に固定支点１６（固定凸片１７、１７）を設けることもできる（図示していない）。 (2) Further, in the above-described embodiment, the fixed fulcrum 16 (fixed convex pieces 17, 17) is provided above the sliding member 10, but the fixed fulcrum 16 (fixed convex pieces 17, 17) is provided below the sliding member 10. ) Can also be provided (not shown).

（３）また、前記実施形態において、１つの操作ロッド４７で、１つの摺動部材１０（同一高さの練り付け具５８）を操作したが、総ての摺動部材１０（同一高さの練り付け具５８）を１つの操作ロッド４７で操作することもできる（図示していない）。 (3) Further, in the above embodiment, one sliding member 10 (kneading tool 58 of the same height) is operated by one operating rod 47, but all the sliding members 10 (of the same height) are operated. The kneading tool 58) can also be operated with one operating rod 47 (not shown).

（４）また、前記実施形態において、摺動部材１０の摺動により、練り付け板２０をロッド軸５に対して放射状に移動させる際に、第一第二連結部材２５、２８を使用したが、他の駆動機構とすることもできる（図示していない）。
さらに、地上からの操作ロッド４７を上下動させて、摺動部材１０の摺動により、練り付け板２０をロッド軸５に対して放射状に移動させたが、他の機構を採用して練り付け板２０をロッド軸５に対して放射状に移動させることもできる（図示していない）。 (4) Further, in the above embodiment, when the kneading plate 20 is moved radially with respect to the rod shaft 5 by sliding the sliding member 10, the first and second connecting members 25 and 28 are used. , Other drive mechanisms are also possible (not shown).
Further, the operating rod 47 from the ground was moved up and down, and the kneading plate 20 was moved radially with respect to the rod shaft 5 by sliding the sliding member 10, but kneading was performed by adopting another mechanism. The plate 20 can also be moved radially with respect to the rod shaft 5 (not shown).

１ロッド本体
３凸連結部
４凹連結部
５ロッド軸
９縦凸条
１０摺動部材
１１円形開口
１２縦凹条
１３連結凸片
１６固定支点
１７固定凸片
２０練り付け板
２１練り付け曲面
２２支持凸板
２５第一連結部材
２６ピン
２８第二連結部材
２９ピン
３１第一保護部材
３１ａ第一保護部材片
３２補強片
３３第一連結部材貫通部
３５第二保護部材
３５ａ第二保護部材片
３６補強片
３７第二連結部材貫通部
４０第三保護部材
４０ａ第三保護部材片
４１支持凸板挿入スリット
４３、４４縦補強片
４７操作ロッド
４８操作ロッドの連結部
５０掘削ヘッド
５１ヘッド本体
５２固定掘削刃
５３水平軸
５４凸連結部
５５掘削腕
５６掘削刃
５８練り付け具
６０杭穴掘削ロッド
６２地面（地上）
６４杭穴の軸部
６５杭穴の拡底部（杭穴の拡径部） 1 Rod body 3 Convex connecting part 4 Concave connecting part 5 Rod shaft 9 Vertical convex strip 10 Sliding member 11 Circular opening 12 Vertical concave strip 13 Connecting convex piece 16 Fixed fulcrum 17 Fixed convex piece 20 Kneading plate 21 Kneading curved surface 22 Support Convex plate 25 First connecting member 26 Pin 28 Second connecting member 29 Pin 31 First protective member 31a First protective member piece 32 Reinforcing piece 33 First connecting member penetrating part 35 Second protective member 35a Second protective member piece 36 Reinforcement Piece 37 Second connecting member penetrating part 40 Third protective member 40a Third protective member piece 41 Supporting convex plate insertion slit 43, 44 Vertical reinforcing piece 47 Operation rod 48 Operation rod connecting part 50 Excavation head 51 Head body 52 Fixed excavation blade 53 Horizontal axis 54 Convex connection 55 Excavation arm 56 Excavation blade 58 Kneading tool 60 Pile hole excavation rod 62 Ground (ground)
64 Pile hole shaft 65 Pile hole bottom expansion (pile hole diameter expansion)

Claims

上端を掘削機に連結し、下端に掘削ヘッドを連結できる杭穴掘削用のロッド本体で、その外周に練り付け具を備え、以下のように構成したことを特徴とする練り付け具付きの杭穴掘削ロッド。
(1) 前記練り付け具は、水平方向に移動可能な駆動部を前記ロッド本体の外周に装着し、前記駆動部に杭穴壁を練り付けできる練り付け板を配置した。
(2) 前記駆動部は、地上からの操作で、前記練り付け板の水平方向の張り出し量を調整できる可変機構を備えた。
(3) 前記駆動部および可変機構を以下(a)～(c)のように構成した。
(a)前記ロッド本体の外周に、前記ロッド本体の軸方向に沿って上下動できる前記摺動部材を取り付け、前記摺動部材に、地上からの操作で上下動可能な操作ロッドの下端を連結した。
(b) 前記ロッド本体の外周で、前記摺動部材の上方または下方に固定支点を設け、前記練り付け板を前記固定支点と前記摺動部材との中間高さに配置した。
(c) 前記摺動部材と前記練り付け板とを第一連結部材で回転自在に連結し、前記固定支点と前記練り付け板とを第二連結部材で回転自在に連結した。 A rod body for excavating a pile hole that can connect the upper end to an excavator and the excavation head to the lower end. Hole drilling rod.
(1) In the kneading tool, a drive unit that can move in the horizontal direction is attached to the outer periphery of the rod body, and a kneading plate capable of kneading a pile hole wall is arranged in the drive unit .
(2) The drive unit is provided with a variable mechanism that can adjust the horizontal overhang amount of the kneading plate by operating from the ground.
(3) The drive unit and the variable mechanism are configured as follows (a) to (c).
(a) The sliding member that can move up and down along the axial direction of the rod body is attached to the outer circumference of the rod body, and the lower end of the operation rod that can move up and down by operation from the ground is connected to the sliding member. bottom.
(b) A fixed fulcrum was provided above or below the sliding member on the outer circumference of the rod body, and the kneading plate was arranged at an intermediate height between the fixed fulcrum and the sliding member.
(c) The sliding member and the kneading plate were rotatably connected by the first connecting member, and the fixed fulcrum and the kneading plate were rotatably connected by the second connecting member.

以下のようにして、練り付け具を構成した請求項１に記載の練り付け具付きの杭穴掘削ロッド。
(1) 摺動部材と第一連結部材との連結、練り付け板と第一連結部材との連結、固定支点と第二連結部材との連結、および練り付け板とを第二連結部材との連結は、いずれもロッド本体の軸と直角でかつ略水平方向のピンで回転自在に連結した。
(2) 前記ロッド本体であって、前記第一連部材の中間位置に、前記第一保護部材が前記ピンの軸方向への移動を規制する第一保護部材を取り付けた。
(3) 前記ロッド本体であって、前記第二連部材の中間位置に、前記第二保護部材が前記ピンの軸方向への移動を規制する第二保護部材を取り付けた。 The pile hole excavation rod with a kneading tool according to claim 1 , wherein the kneading tool is configured as follows.
(1) Connection between the sliding member and the first connecting member, connection between the kneading plate and the first connecting member, connection between the fixed fulcrum and the second connecting member, and connection between the kneading plate and the second connecting member. All of the connections were rotatably connected with pins at right angles to the axis of the rod body and in a substantially horizontal direction.
(2) In the rod main body, a first protective member for restricting the axial movement of the pin by the first protective member was attached to an intermediate position of the first series member.
(3) In the rod main body, a second protective member for restricting the axial movement of the pin by the second protective member was attached to an intermediate position of the second continuous member.