JP2981164B2 - Drilling rig - Google Patents

Drilling rig

Info

Publication number
JP2981164B2
JP2981164B2 JP8006900A JP690096A JP2981164B2 JP 2981164 B2 JP2981164 B2 JP 2981164B2 JP 8006900 A JP8006900 A JP 8006900A JP 690096 A JP690096 A JP 690096A JP 2981164 B2 JP2981164 B2 JP 2981164B2
Authority
JP
Japan
Prior art keywords
casing
fixed
hole
detent
excavator
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.)
Expired - Lifetime
Application number
JP8006900A
Other languages
Japanese (ja)
Other versions
JPH09195655A (en
Inventor
泰広 河野
芳幸 吉川
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.)
KINUTA YOKO KK
KONO KOGYO JUGEN
Original Assignee
KINUTA YOKO KK
KONO KOGYO JUGEN
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
Family has litigation
Application filed by KINUTA YOKO KK, KONO KOGYO JUGEN filed Critical KINUTA YOKO KK
Priority to JP8006900A priority Critical patent/JP2981164B2/en
Publication of JPH09195655A publication Critical patent/JPH09195655A/en
Application granted granted Critical
Publication of JP2981164B2 publication Critical patent/JP2981164B2/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11651115&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JP2981164(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
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Links

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、基礎杭等の造成に
あたって地盤を掘削する掘削装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digging apparatus for digging a ground for forming a foundation pile or the like.

【0002】[0002]

【従来の技術】この種の掘削装置として一般に使用され
るアースオーガ装置では、クローラクレーンによってリ
ーダを鉛直に立設し、このリーダに回転駆動手段たるオ
ーガマシンを昇降可能に装備し、このオーガマシンに、
先端に掘削ビットを備えた掘削軸部材を垂下連結し、し
かして掘削軸部材をオーガマシンにより回転させて地盤
の掘削を行うようにしている。
2. Description of the Related Art In an earth auger apparatus generally used as this type of excavator, a leader is vertically provided by a crawler crane, and an auger machine serving as a rotary driving means is mounted on the reader so as to be able to move up and down. To
A drilling shaft member having a drilling bit at its tip is vertically connected, and the drilling shaft member is rotated by an auger machine to excavate the ground.

【0003】[0003]

【発明が解決しようとする課題】上記アースオーガ装置
のような掘削装置では、オーガマシンの駆動時の回転反
力を受支するために必ずリーダが必要となる。しかし
て、リーダの長さが長くなると、施工現場内でのリーダ
の移動作業や、現場へのリーダの搬入及び現場からの搬
出作業に非常な手間と時間を要する。また、傾斜地での
地盤掘削にあっては、クローラクレーンの接地面とリー
ダの接地面との段差が大きい場合にリーダの長さを長く
とれず、掘削深さが制限されることになる。
In an excavator such as the above-mentioned earth auger apparatus, a leader is always required to receive a rotational reaction force when the auger machine is driven. However, when the length of the leader becomes long, it takes a lot of time and effort to move the leader within the construction site, and to carry the leader into and out of the site. In the case of excavating the ground on an inclined ground, when the step between the contact surface of the crawler crane and the contact surface of the leader is large, the length of the leader cannot be increased, and the excavation depth is limited.

【0004】本発明は、上記の課題に鑑み、リーダを使
用せずに地盤の掘削を行うことができて作業能率を向上
でき、また傾斜地での地盤掘削においてクレーンの接地
面とリーダの接地面との間に可成りの段差がある場合で
も、リーダを十分に長くできて必要な深さまで掘削を行
える掘削装置を提供することを目的とする。
SUMMARY OF THE INVENTION In view of the above problems, the present invention makes it possible to excavate the ground without using a leader, thereby improving work efficiency. It is an object of the present invention to provide an excavator capable of making a leader sufficiently long and excavating to a required depth even when there is a considerable step between the excavator and the excavator.

【0005】[0005]

【課題を解決するための手段】請求項1に係る発明の掘
削装置は、昇降可能に支持される回転駆動装置1と、先
端に掘削ビット27を有し、回転駆動装置1下部の回転
駆動軸3に一体回転可能に連結される掘削軸部材2と、
掘削軸部材2に套嵌されると共に、回転駆動装置1の機
枠6に一体的に垂下連結される固定ケーシング5と、掘
削すべき地盤上の所定箇所に水平に設置され、固定ケー
シング5を上下方向に自由に挿通させるが該固定ケーシ
ング5の回転を阻止することができるケーシング挿通孔
8を有するケーシング回り止め部材7と、からなるもの
である。
According to a first aspect of the present invention, there is provided an excavator having a rotary drive unit 1 supported so as to be able to move up and down, a drill bit 27 at a tip, and a rotary drive shaft below the rotary drive unit 1. Excavation shaft member 2 integrally rotatably connected to 3;
The fixed casing 5 which is fitted over the excavation shaft member 2 and is integrally and vertically connected to the machine frame 6 of the rotary drive device 1 and the fixed casing 5 which is horizontally installed at a predetermined position on the ground to be excavated. A casing rotation preventing member 7 having a casing insertion hole 8 that can be freely inserted in the vertical direction but can prevent rotation of the fixed casing 5.

【0006】この掘削装置の使用にあっては、クレーン
ブームMから昇降操作用ワイヤーWを介して回転駆動装
置1を吊支し、この回転駆動装置1の下部から固定ケー
シング5及び掘削軸部材2を垂下した状態で、固定ケー
シング5を、地盤上の所定箇所(掘孔箇所18)に固定
されているケーシング回り止め部材7のケーシング挿通
孔8に挿入させる。こうして固定ケーシング5をケーシ
ング回り止め部材7のケーシング挿通孔8に挿入するこ
とにより、固定ケーシング5は、上下方向に移動可能で
あるがその回転が阻止される。つまり、回転駆動装置1
の回転反力はケーシング回り止め部材7によって受支さ
れることになる。しかして、昇降操作用ワイヤーWを繰
り出しつつ、回転駆動装置1を作動させて掘削軸部材2
を回転させながら地盤を掘削する。
In use of the excavator, a rotary drive 1 is suspended from a crane boom M via a wire W for raising and lowering, and a fixed casing 5 and a drill shaft 2 The fixed casing 5 is inserted into the casing insertion hole 8 of the casing detent member 7 fixed at a predetermined position (dig hole 18) on the ground in a state where is suspended. By inserting the fixed casing 5 into the casing insertion hole 8 of the casing rotation preventing member 7 in this manner, the fixed casing 5 can be moved in the vertical direction but its rotation is prevented. That is, the rotation driving device 1
Is received by the casing detent member 7. Thus, while the wire W for raising and lowering operation is being extended, the rotation driving device 1 is operated to operate the excavation shaft member 2.
Excavates the ground while rotating.

【0007】上記のように、この発明の掘削装置は、掘
削すべき地盤上の所定箇所に水平に設置され、固定ケー
シング5を上下方向に自由に挿通させるが当該固定ケー
シング5の回転を阻止するケーシング挿通孔8を形成し
てなるケーシング回り止め部材7を備えているから、こ
のケーシング回り止め部材7によって回転駆動装置1の
回転反力を受支させることができる。従って、従来装置
のようにリーダを使用することなく、地盤の掘削を行う
ことができる。
As described above, the excavator of the present invention is installed horizontally at a predetermined position on the ground to be excavated, and allows the fixed casing 5 to freely penetrate vertically, but prevents the fixed casing 5 from rotating. Since the casing rotation preventing member 7 having the casing insertion hole 8 is provided, the casing rotation preventing member 7 can receive the rotational reaction force of the rotation drive device 1. Therefore, excavation of the ground can be performed without using a leader unlike the conventional apparatus.

【0008】請求項2に係る発明は、請求項1に記載の
掘削装置において、固定ケーシング5は円筒状のケーシ
ングからなり、この円筒状固定ケーシング5の外周面に
係合用突条部17が長手方向全長に亘って条設されてお
り、ケーシング回り止め部材7は、前記円筒状固定ケー
シング5が挿通可能な円形孔部8aと、この円形孔部8
aの内周部に凹設されていて前記係合用突条部17が挿
通可能な係合用凹部8bとからなるケーシング挿通孔8
を備えてなるものである。
According to a second aspect of the present invention, in the excavator according to the first aspect, the fixed casing 5 is formed of a cylindrical casing, and an engaging projection 17 is formed on the outer peripheral surface of the cylindrical fixed casing 5 in a longitudinal direction. The casing rotation preventing member 7 includes a circular hole 8a through which the cylindrical fixed casing 5 can be inserted, and a circular hole 8a.
a, which is recessed in the inner peripheral portion of FIG.
It is provided with.

【0009】請求項3に係る発明は、請求項1または2
に記載の掘削装置において、ケーシング回り止め部材7
は、平板状に形成されていて、掘削地盤上の掘孔箇所1
8を挟んでその両側に水平に敷設された長尺状の横向き
H形鋼からなる一対の支持部材19,19上に載設固定
されるようにしたものである。
The invention according to claim 3 is the invention according to claim 1 or 2
In the excavator described in the above, the casing detent member 7
Is formed in the shape of a flat plate and has a hole 1 on the excavated ground.
8 is mounted and fixed on a pair of support members 19, 19 made of a long transversely oriented H-shaped steel laid horizontally on both sides of the support member 8.

【0010】請求項4に係る発明は、請求項3に記載の
掘削装置において、ケーシング回り止め部材7は、前記
支持部材19の長手方向と直交する方向の分割線に沿っ
て2分割された一対の半割板7a,7bからなるもので
ある。
According to a fourth aspect of the present invention, in the excavator according to the third aspect, the casing detent member 7 is divided into two parts along a dividing line in a direction orthogonal to a longitudinal direction of the support member 19. Of half-plates 7a and 7b.

【0011】請求項5に係る発明は、請求項3または4
に記載の掘削装置において、前記一対の支持部材19,
19の上面には、ケーシング回り止め部材7を両支持部
材19,19間の中心位置に位置決めするための複数の
位置決め突起23が、掘孔箇所18ごとに支持部材19
長手方向所定ピッチで突設されており、ケーシング回り
止め部材7には前記位置決め突起23が係合可能な係合
部24が設けられてなるものである。
[0011] The invention according to claim 5 is the invention according to claim 3 or 4.
In the excavator according to the above, the pair of support members 19,
A plurality of positioning projections 23 for positioning the casing rotation preventing member 7 at the center position between the two supporting members 19, 19 are provided on the upper surface of the
The casing rotation preventing member 7 is provided with an engaging portion 24 with which the positioning protrusion 23 can be engaged.

【0012】[0012]

【発明の実施の形態】図1は、本発明に係る掘削装置の
全体を概略的に示し、図2はその一部を拡大して示して
いる。これらの図において1は、クレーン車Kのブーム
M先端から垂下される昇降操作用ワイヤーWによって昇
降可能に吊支された回転駆動装置、2は、回転駆動装置
1の下部に突出した回転駆動軸3に一体回転可能に垂下
連結された掘削軸部材で、この掘削軸部材2の下部には
ダウンザホールハンマー4が連設されている。5は、掘
削軸部材2に套嵌されると共に、回転駆動装置1の機枠
6に一体的に垂下連結された固定ケーシングであり、7
は、掘削すべき地盤上の所定箇所に水平に設置されたケ
ーシング回り止め部材で、固定ケーシング5を上下方向
に自由に挿通させるが該固定ケーシング5の回転を阻止
することのできるケーシング挿通孔8(図4、図7参
照)を備えている。
FIG. 1 schematically shows an entire excavator according to the present invention, and FIG. 2 shows an enlarged part of the excavator. In these figures, reference numeral 1 denotes a rotary drive device suspended and supported by a lifting / lowering operation wire W hanging from the tip of a boom M of a crane truck K, and 2 denotes a rotary drive shaft protruding below the rotary drive device 1. A down-the-hole hammer 4 is continuously provided below the excavation shaft member 2. Reference numeral 5 denotes a fixed casing which is fitted over the excavation shaft member 2 and is integrally and vertically connected to a machine frame 6 of the rotary drive device 1.
Is a casing detent member horizontally installed at a predetermined location on the ground to be excavated, and is a casing insertion hole 8 that allows the fixed casing 5 to freely penetrate vertically but prevents rotation of the fixed casing 5. (See FIGS. 4 and 7).

【0013】回転駆動装置1は、アースオーガ装置のオ
ーガマシンと同様なもので、機枠6に油圧または電動モ
ーター等を内蔵しており、この機枠6の下部には、図2
に示すようにスカート状のブラケット9が一体的に突設
され、このブラケット9内に前記回転駆動軸3が同心状
に突設されている。また、機枠6の頂部には昇降操作用
ワイヤーWを掛装する滑車10が設けられている。この
回転駆動装置1には、アースオーガ装置のオーガマシン
をそのまま使用してもよい。
The rotary drive device 1 is similar to an auger machine of an earth auger device. A hydraulic or electric motor or the like is built in a machine frame 6.
As shown in FIG. 1, a skirt-shaped bracket 9 is integrally protruded, and the rotary drive shaft 3 is concentrically protruded in the bracket 9. A pulley 10 on which a lifting operation wire W is mounted is provided at the top of the machine frame 6. An auger machine of an earth auger device may be used as it is for the rotary drive device 1.

【0014】掘削軸部材2は、例えば継ぎ足し可能な複
数本の円筒状ケーシング部材11からなるもので、上段
側ケーシング部材11の上部に中空状の回転軸部材12
が同軸状に連結され、この回転軸部材12の上端フラン
ジ部12aが前記回転駆動軸3のフランジ部3aに接合
されており、この回転軸部材12の下部にダウンザホー
ルハンマー4が同軸状に連設されている。また回転軸部
材12内には、図3(A)に示すようにエア導入路13
が形成してあって、このエア導入路13は、回転軸部材
12に外嵌装備されたエアスイベル14を介して外部の
エア導入管15に連通連結されると共に、図2及び図3
(B)に示すように前記各ケーシング部材11内に同軸
状に配管されたエア供給管16に接続され、このエア供
給管16によってダウンザホールハンマー4に駆動用の
エアが供給される。
The excavating shaft member 2 is composed of, for example, a plurality of cylindrical casing members 11 that can be replenished, and a hollow rotary shaft member 12 is provided above the upper casing member 11.
Are connected coaxially, and an upper end flange portion 12a of the rotary shaft member 12 is joined to the flange portion 3a of the rotary drive shaft 3. A down-the-hole hammer 4 is coaxially connected to a lower portion of the rotary shaft member 12. Have been. In addition, as shown in FIG.
The air introduction path 13 is connected to an external air introduction pipe 15 via an air swivel 14 fitted to the rotary shaft member 12 and is connected to the outside.
As shown in FIG. 2B, the air supply pipe 16 is coaxially arranged in each of the casing members 11, and the driving air is supplied to the down-the-hole hammer 4 by the air supply pipe 16.

【0015】前記固定ケーシング5は、円筒状のケーシ
ングからなるもので、図1〜図3に示すように、その外
周面に例えば2条の係合用突条部17,17が周方向に
一定間隔でそれぞれ長手方向全長に亘って一体または一
体的に条設されている。この係合用突条部17は1条で
もよいし、複数条でもよい。そして、固定ケーシング5
の上端フランジ部5aが、前記機枠6下部に突設された
スカート状ブラケット9の下端フランジ部9aに接合さ
れ、それによって固定ケーシング5が回転駆動装置1の
機枠6に一体的に固定される。この固定ケーシング5
は、全長にわたり一体に形成された所謂1本ものでもよ
いが、好ましくは、地盤の掘削長さに応じて継ぎ足しで
きるように互いに連結可能な複数の固定ケーシング部材
からなるものがよい。
The fixed casing 5 is formed of a cylindrical casing. As shown in FIGS. 1 to 3, for example, two engaging projections 17, 17 are provided on an outer peripheral surface of the fixed casing at a predetermined interval in the circumferential direction. Are provided integrally or integrally over the entire length in the longitudinal direction. The number of the protrusions 17 for engagement may be one or more. And the fixed casing 5
Is joined to a lower end flange portion 9a of a skirt-like bracket 9 projecting below the machine frame 6, whereby the fixed casing 5 is integrally fixed to the machine frame 6 of the rotary drive device 1. You. This fixed casing 5
May be so-called one piece integrally formed over the entire length, but is preferably formed of a plurality of fixed casing members that can be connected to each other so that they can be added according to the excavation length of the ground.

【0016】次に、ケーシング回り止め部材7について
図4〜図7を参照して説明すると、ケーシング回り止め
部材7は、例えば厚板状の鉄板によって形成されたもの
で、前記円筒状固定ケーシング5の外径よりわずかに大
きい内径を有して当該ケーシング5が挿通可能な円形孔
部8aと、この円形孔部8aの内周部の直径方向対向位
置に凹設されて、前記両係合用突条部17,17がそれ
ぞれ挿通可能な係合用凹部8b,8bとからなるケーシ
ング挿通孔8を備えている。そして、このケーシング回
り止め部材7は、図4及び図7に示すように、掘削地盤
上の掘孔箇所18(図4参照)を挟んでその両側に水平
に敷設された長尺状の横向きH形鋼からなる一対の支持
部材19,19上に載設固定されるようになっている。
Next, the casing detent member 7 will be described with reference to FIGS. 4 to 7. The casing detent member 7 is formed of, for example, a thick iron plate. A circular hole 8a having an inner diameter slightly larger than the outer diameter of the casing 5 and through which the casing 5 can be inserted; Each of the strips 17 has a casing insertion hole 8 formed with an engagement recess 8b that can be inserted therethrough. As shown in FIGS. 4 and 7, the casing detent member 7 is a long, horizontally oriented H that is horizontally laid on both sides of a digging hole 18 (see FIG. 4) on the digging ground. It is mounted and fixed on a pair of support members 19 made of a shaped steel.

【0017】また、ケーシング回り止め部材7は、図4
及び図5に示すように、横向きH形鋼よりなる前記支持
部材19の長手方向と直交する方向の分割線に沿って2
分割された一対の半割板7a,7bからなるもので、一
方の半割板7aの分割端部上には、他方の半割板7bの
分割端部上に重合するように載置される連結片20,2
0が溶接によって固着されており、各連結片20とこれ
と重なり合う他方の半割板7bの所要部にボルト挿通孔
21,22がそれぞれ複数個設けてある。
Further, the casing detent member 7 is similar to the one shown in FIG.
5, as shown in FIG. 5, along a dividing line in a direction orthogonal to the longitudinal direction of the support member 19 made of a horizontal H-section steel.
It is composed of a pair of divided half plates 7a and 7b, and is placed on the divided end of one half 7a so as to overlap with the divided end of the other half 7b. Connecting piece 20, 2
Reference numeral 0 is fixed by welding, and a plurality of bolt insertion holes 21 and 22 are provided at required portions of each connecting piece 20 and the other half plate 7b overlapping with each other.

【0018】そして、前記両支持部材19,19の上面
には、図4及び図7に示すように、ケーシング回り止め
部材7を、両支持部材19,19間の間隔方向中心位置
に位置決めするための例えば4個の位置決め突起23
が、各掘孔箇所18ごとに、支持部材19長手方向に所
定のピッチで突設されており、またケーシング回り止め
部材7には各半割板7a,7bの所要部位に、前記各位
置決め突起23が係合可能な係合部24が設けられてい
る。また、両支持部材19,19には、図7に示すよう
に、ケーシング回り止め部材7を、上記位置決め突起2
3と係合部24とで所定位置に位置決した状態でボルト
25によりボルト止めするためのボルト孔26が設けら
れている。
On the upper surfaces of the support members 19, 19, as shown in FIGS. 4 and 7, the casing detent member 7 is positioned at the center between the support members 19, 19 in the space direction. For example, four positioning projections 23
Are provided at a predetermined pitch in the longitudinal direction of the support member 19 for each of the excavation holes 18, and the casing rotation preventing member 7 is provided at a required portion of each of the half plates 7 a and 7 b with the positioning protrusions. An engagement portion 24 to which the engagement 23 can be provided is provided. As shown in FIG. 7, the casing rotation preventing member 7 is attached to both the support members 19 and 19 by the positioning protrusions 2.
A bolt hole 26 for bolting with a bolt 25 in a state where it is positioned at a predetermined position by 3 and the engaging portion 24 is provided.

【0019】従って、ケーシング回り止め部材7を、掘
孔箇所18に対応する両支持部材19,19上の所定位
置に固定するには、先ず、連結片20が設けられていな
い方の半割板7bを、その係合部24が両支持部材1
9,19側の位置決め突起23に係合するように両支持
部材19,19上に載置し、その後(実際には、掘削施
工の際に固定ケーシング5を当該半割板7bのケーシン
グ挿通孔8部分に挿通した後)、他方の半割板7aを上
記同様な要領で両支持部材19,19上に載置する(こ
のとき、当該半割板7aのケーシング挿通孔8部分を固
定ケーシング5に嵌合させる)と共に、連結片20を前
記一方の半割板7b上に重合させて、図4に示すような
状態とし、そしてボルト25を上記連結片20のボルト
挿通孔21から半割板7bのボルト挿通孔22へ、更に
各支持部材19のボルト孔26に挿通させ、その挿通端
部にナット(図示せず)を螺合締結して、ケーシング回
り止め部材7を両支持部材19,19上の所定位置に固
定する。
Therefore, in order to fix the casing detent member 7 at a predetermined position on both support members 19, 19 corresponding to the digging hole 18, first, the half plate having no connecting piece 20 is provided. 7b, and the engaging portion 24 is
It is mounted on both support members 19, 19 so as to engage with the positioning projections 23 on the sides 9, 9, and then (actually, during excavation work, the fixed casing 5 is inserted into the casing insertion hole of the half plate 7b). 8), and the other half plate 7a is placed on both supporting members 19, 19 in the same manner as described above (at this time, the casing insertion hole 8 of the half plate 7a is fixed to the fixed casing 5). At the same time, the connecting piece 20 is superimposed on the one half plate 7b so as to be in a state as shown in FIG. 4, and the bolt 25 is moved from the bolt insertion hole 21 of the connecting piece 20 to the half plate. 7b is further inserted into the bolt hole 26 of each support member 19, and a nut (not shown) is screwed and fastened to the insertion end of the bolt, so that the casing detent member 7 is connected to both support members 19, 19 at a predetermined position.

【0020】前記ダウンザホールハンマー4は、周知構
造のものであるため詳細な図示は省略するが、図2に示
されるハンマー本体4a内部にシリンダが設けあって、
このシリンダ内を摺動するハンマーピストンが、圧縮さ
れたエアの供給によって往復運動を行い、このハンマー
ピストンがハンマー本体4aの下部に突出する掘削ビッ
ト27を打撃するようになっている。このハンマー4を
駆動するエアは、前記エア供給管16から上記シリンダ
に供給される。このダウンザホールハンマー4は掘削軸
部材2と一体であって、この掘削軸部材2の回転に伴っ
て回転することになる。また図2に示すように、固定ケ
ーシング5内の下端部には、ダウンザホールハンマー4
のハンマー本体4a部分を回転可能に支持する環状のガ
イド28が複数の取付片29を介して取り付けられてい
る。
Since the down-the-hole hammer 4 has a well-known structure, a detailed illustration is omitted, but a cylinder is provided inside the hammer main body 4a shown in FIG.
A hammer piston that slides in the cylinder reciprocates by supplying compressed air, and the hammer piston strikes a drill bit 27 projecting to a lower portion of the hammer body 4a. Air for driving the hammer 4 is supplied from the air supply pipe 16 to the cylinder. The down-the-hole hammer 4 is integral with the excavating shaft member 2 and rotates with the rotation of the excavating shaft member 2. As shown in FIG. 2, a down-the-hole hammer 4 is provided at the lower end in the fixed casing 5.
An annular guide 28 rotatably supporting the hammer body 4a is mounted via a plurality of mounting pieces 29.

【0021】また、図2及び図3に示すように、固定ケ
ーシング5の上端部側には、回転軸部材12内のエア導
入路13に連通連結したエア導入管15をエアスイベル
14から固定ケーシング5の外に延出するための長孔3
0が開口されている。この場合、長孔30にエア導入管
15が係止されるため、エアスイベル14の回転が阻止
されることになる。
As shown in FIGS. 2 and 3, an air introduction pipe 15 connected to an air introduction passage 13 in the rotary shaft member 12 is connected to the upper end of the fixed casing 5 from the air swivel 14 through the fixed casing 5. Slot 3 to extend outside
0 is open. In this case, since the air introduction pipe 15 is locked in the long hole 30, the rotation of the air swivel 14 is prevented.

【0022】上述したような構成よりなる掘削装置を使
用して、地盤を掘削し基礎杭を造成するには、先ず、ク
レーンブームMの先端から昇降操作用ワイヤーWを介し
て回転駆動装置1を吊支し、この回転駆動装置1の下部
から固定ケーシング5と掘削軸部材2及びダウンザホー
ルハンマー4を垂下した状態で、固定ケーシング5を、
一対の支持部材19,19上の所定位置にに固定されて
いるケーシング回り止め部材7のケーシング挿通孔8に
挿入させる。
In order to excavate the ground and create a foundation pile by using the excavator having the above-described configuration, first, the rotary driving device 1 is moved from the tip of the crane boom M via the lifting / lowering operation wire W. In a state where the fixed casing 5, the excavation shaft member 2 and the down-the-hole hammer 4 are suspended from the lower part of the rotary drive device 1, the fixed casing 5 is
The casing rotation preventing member 7 fixed at a predetermined position on the pair of support members 19 is inserted into the casing insertion hole 8.

【0023】この場合、ケーシング回り止め部材7は、
前記したように、その一方の半割板7bを、両支持部材
19,19上の定位置に係合部24と位置決め突起23
とを係合させることによりセットし、この状態から固定
ケーシング5を当該半割板7bの半円状ケーシング挿通
孔8部分(ケーシング挿通孔8の半分)に挿入すると共
に、固定ケーシング5側の係合用突条部17を当該半割
板7b側の係合用凹部8bに係合させ、しかる後に他方
の半割板7aを固定ケーシング5に嵌合しながら前記一
方の半割板7bに対向する定位置に前記同様に係合部2
4と位置決め突起23とを係合させてセットし、両半割
板7a,7bにより固定ケーシング5を挟持した状態と
し、そしてボルト25により両半割板7a,7bを支持
部材19,19上に締結固定する。この場合、一対の支
持部材19,19は、縦方向または横方向の一連の掘孔
箇所18の配列方向に沿って地盤上に配置固定する。
In this case, the casing detent member 7 is
As described above, one of the half plates 7b is moved to the fixed position on both support members 19, 19 by the engaging portion 24 and the positioning protrusion 23.
The fixed casing 5 is inserted into the semicircular casing insertion hole 8 portion (half of the casing insertion hole 8) of the half plate 7b from this state, and the fixed casing 5 side The joint ridge 17 is engaged with the engaging recess 8b on the half plate 7b side, and then the other half plate 7a is fitted to the fixed casing 5 while facing the one half plate 7b. In the same manner as described above,
4 and the positioning projection 23 are engaged with each other and set, the fixed casing 5 is sandwiched between the two half plates 7a and 7b, and the two half plates 7a and 7b are mounted on the support members 19 and 19 by bolts 25. Fasten and fix. In this case, the pair of support members 19, 19 are arranged and fixed on the ground along the arrangement direction of a series of digging holes 18 in the vertical or horizontal direction.

【0024】上記のようにして、固定ケーシング5を、
ケーシング回り止め部材7のケーシング挿通孔8に対し
上下方向に移動可能ではあるが当該固定ケーシングの回
転が阻止されるように挿通した状態から、昇降操作用ワ
イヤーWを繰り出しつつ、回転駆動装置1を作動させて
掘削軸部材2をダウンザホールハンマー4と共に回転さ
せ、且つこのダウンザホールハンマー4を作動させて掘
削ビット27を打撃しながら、この掘削軸部材2の回転
による掘削ビット27の回転掘削作用とダウンザホール
ハンマー4の打撃作用とによって、地盤を掘削する。
As described above, the fixed casing 5 is
The rotation drive device 1 is moved out of the casing insertion hole 8 of the casing rotation preventing member 7 while being able to move in the vertical direction but being inserted so as to prevent the rotation of the fixed casing. When the excavating shaft member 2 is operated to rotate the excavating shaft member 2 together with the down-the-hole hammer 4, and the down-the-hole hammer 4 is operated to strike the excavating bit 27, the rotary excavating operation of the excavating bit 27 due to the rotation of the excavating shaft member 2 and the down-the-hole hammer The ground is excavated by the impact action of No. 4.

【0025】所定深度まで掘削したならば、エアの供給
を停止してダウンザホールハンマー4の作動を停止させ
た後、昇降操作用ワイヤーWを巻取り操作して、固定ケ
ーシング5を掘削軸部材2及びダウンザホールハンマー
4と共に引き上げ、その後掘孔内に、グラウト圧送ポン
プに接続されたグラウトホースを引き入れてセメントミ
ルク等のグラウトを注入する。尚、この場合、前記回転
軸部材12にグラウト導入路を設けると共に、このグラ
ウト導入路に連通するグラウト供給管を、掘削軸部材2
内に前記エア供給管16と平行して配管し、更にグラウ
トスイベルによって上記グラウト導入路に外部からグラ
ウトを導入するように構成しておけば、上記のように固
定ケーシング5を引き上げてしまわなくても、掘削終了
後直ちにグラウトを掘孔内に注入することができる。グ
ラウトの注入を終えたならば、このグラウトが注入充填
された掘孔内にH型鋼等の鉄筋、その他所要の杭を建て
込んで、基礎杭を造成する。
After excavation to a predetermined depth, the supply of air is stopped and the operation of the down-the-hole hammer 4 is stopped, and then the wire W for raising and lowering operation is wound up to move the fixed casing 5 to the excavating shaft member 2 and Then, the grout such as cement milk is injected into the borehole by pulling in a grout hose connected to a grout pump. In this case, a grout introduction path is provided in the rotary shaft member 12 and a grout supply pipe communicating with the grout introduction path is connected to the excavation shaft member 2.
If the grout swivel is used to introduce grout from outside into the grout introduction path, the fixed casing 5 will not be pulled up as described above. Also, the grout can be injected into the borehole immediately after the end of the excavation. After the grouting is completed, a reinforcing pile such as an H-beam and other necessary piles are erected in the borehole filled with the grout to form a foundation pile.

【0026】上記のようにして一箇所での掘削作業及び
グラウトの充填作業を終えたならば、ケーシング回り止
め部材7を両支持部材19,19から取り外して、この
ケーシング回り止め部材7を、両支持部材19,19に
沿った次の掘孔箇所18に上記同様な要領で係合部24
と位置決め突起23とを利用してセットし、掘削作業及
びグラウト注入作業を行い、以降は、上記同様にして一
連の基礎杭を造成する。尚、ケーシング回り止め部材7
の取り外しは、掘削終了後、固定ケーシング5の引き上
げ前に行ってもよい。
When the excavation work and the grout filling work at one place are completed as described above, the casing detent member 7 is removed from the support members 19, 19, and the casing detent member 7 is detached from the both members. At the next excavated hole 18 along the supporting members 19, 19, the engaging portions 24 are formed in the same manner as described above.
The excavation work and the grouting work are performed by using the and the positioning projections 23, and thereafter, a series of foundation piles is formed in the same manner as described above. The casing rotation preventing member 7
May be removed after the excavation is completed and before the fixed casing 5 is pulled up.

【0027】以上の説明から明らかなように、この掘削
装置は、掘削すべき地盤上の所定の掘孔箇所18に水平
に設置され、固定ケーシング5を上下方向に自由に挿通
させるが当該固定ケーシング5の回転を阻止し得るケー
シング挿通孔8を形成してなるケーシング回り止め部材
7を備えているから、このケーシング回り止め部材7に
よって回転駆動装置1の回転反力を受支させることがで
き、それによって従来装置のようにリーダを使用するこ
となく、地盤の掘削を行うことができる。
As is clear from the above description, this excavator is installed horizontally at a predetermined excavation point 18 on the ground to be excavated, and allows the fixed casing 5 to freely penetrate vertically. Since the casing rotation preventing member 7 having the casing insertion hole 8 that can prevent the rotation of the casing 5 is provided, the casing rotation preventing member 7 can receive the rotational reaction force of the rotation drive device 1, As a result, excavation of the ground can be performed without using a leader unlike the conventional apparatus.

【0028】尚、上述した実施の形態では、固定ケーシ
ング5が円筒状のケーシングからなり、その外周面に係
合用突条部17が長手方向に条設されており、そしてケ
ーシング回り止め部材7が、上記円筒状固定ケーシング
5が挿通可能な円形孔部8aと、この円形孔部8aの内
周部に凹設されて係合用突条部17が挿通可能な係合用
凹部8bとからなるケーシング挿通孔8を備えたものと
したが、固定ケーシングとして角筒状ケーシングを使用
し、ケーシング回り止め部材に、その角筒状ケーシング
の外形に対応るす角孔状のケーシング挿通孔を設けるよ
うにしてもよい。この実施の形態のような構成とした場
合には、固定ケーシング5が円筒状ケーシングからなる
ため、地盤への固定ケーシング5の打ち込み及び引き抜
きが容易となり、またケーシングの材料コストも、円筒
状ケーシングの方が角筒状ケーシングより安価である。
In the above-described embodiment, the fixed casing 5 is formed of a cylindrical casing, the engaging ridge 17 is provided on the outer peripheral surface thereof in the longitudinal direction, and the casing rotation preventing member 7 is provided. A casing having a circular hole 8a through which the cylindrical fixed casing 5 can be inserted, and an engaging recess 8b recessed in the inner peripheral portion of the circular hole 8a and through which the engaging ridge 17 can be inserted. Although the hole 8 was provided, a rectangular cylindrical casing was used as the fixed casing, and the casing detent member was provided with a rectangular casing insertion hole corresponding to the outer shape of the rectangular cylindrical casing. Is also good. In the case of this embodiment, since the fixed casing 5 is formed of a cylindrical casing, the fixed casing 5 can be easily driven into and pulled out from the ground, and the material cost of the casing is reduced. It is cheaper than a rectangular cylindrical casing.

【0029】そして、前記ケーシング回り止め部材7
は、平板状に形成されたものであるため、鉄板等によっ
て簡単容易に製作することができる上、取り扱いや運搬
に便利である。また、ケーシング回り止め部材7は、掘
削地盤上の掘孔箇所18を挟んでその両側に水平に敷設
された長尺状の横向きH形鋼からなる一対の支持部材1
9,19上に載設固定されるようになっているため、多
数の基礎杭を縦または横列状に順次造成してゆく場合
に、両支持部材19,19を縦または横列状の掘孔箇所
18に沿って敷設しておくことによって、1つの掘孔箇
所18での基礎杭の造成を終えた後、ケーシング回り止
め部材7を両支持部材19,19に沿って所要ピッチ移
動させてセットし、その位置に固定ケーシング5を位置
決めでき、以降も同様に位置決めでき、従って基礎杭の
造成作業をきわめて能率良く行うことができると共に、
縦または横列状の複数の基礎杭の芯合わせを容易に行う
ことができる。
Then, the casing detent member 7
Since is formed in a flat plate shape, it can be easily and easily manufactured using an iron plate or the like, and is convenient for handling and transportation. The casing detent member 7 is composed of a pair of support members 1 made of a long, horizontally oriented H-shaped steel laid horizontally on both sides of a digging hole 18 on the digging ground.
Since a large number of foundation piles are successively formed in a vertical or horizontal row, the support members 19, 19 are vertically or horizontally aligned because a plurality of foundation piles are sequentially mounted or fixed. By laying along the base 18, after completing the formation of the foundation pile at one excavation point 18, the casing detent member 7 is moved and set at a required pitch along the support members 19, 19 and set. , The fixed casing 5 can be positioned at that position, and thereafter can be similarly positioned, so that the work for forming the foundation pile can be performed extremely efficiently,
A plurality of vertical or horizontal foundation piles can be easily centered.

【0030】また、ケーシング回り止め部材7は、両支
持部材19,19の長手方向と直交する方向の分割線に
沿って2分割された一対の半割板7a,7bからなるた
め、支持部材19,19上へのケーシング回り止め部材
7の取り付けにあたって、一方の半割板7bを支持部材
19,19上の定位置に配置した後、固定ケーシング5
を当該一方の半割板7bのケーシング挿通孔8部分に挿
通させ、しかる後他方の半割板7aのケーシング挿通孔
8部分を固定ケーシング5に嵌合させるようにすること
により、ケーシング回り止め部材7のケーシング挿通孔
8への固定ケーシング5の挿通作業を容易に行うことが
できる。
The casing detent member 7 is composed of a pair of half plates 7a and 7b divided into two along a dividing line in a direction perpendicular to the longitudinal direction of the two support members 19, 19. When the casing detent member 7 is mounted on the supporting members 19, 19, the half plate 7b is disposed at a fixed position on the supporting members 19, 19, and then the fixed casing 5
Is inserted into the casing insertion hole 8 of the one half plate 7b, and then the casing insertion hole 8 of the other half plate 7a is fitted to the fixed casing 5. The work of inserting the fixed casing 5 into the casing insertion hole 8 of the casing 7 can be easily performed.

【0031】更に、両支持部材19,19の上面に、ケ
ーシング回り止め部材7を両支持部材19,19間の中
心位置に位置決めするための複数の位置決め突起23
が、掘孔箇所18ごとに支持部材19の長手方向所定ピ
ッチで突設され、且つケーシング回り止め部材7に、上
記位置決め突起23が係合可能な係合部24が設けられ
ているため、両支持部材19,19上へのケーシング回
り止め部材7の位置決めを迅速容易に行え、それにより
施工を一層能率良く行うことができると共に、多数の基
礎杭を縦または横列状に順次造成してゆく場合に縦また
は横列状の複数の基礎杭の杭芯を正確に一致させること
ができる。
Further, a plurality of positioning projections 23 for positioning the casing detent member 7 at a center position between the support members 19, 19 are provided on the upper surfaces of the support members 19, 19.
Are projected at a predetermined pitch in the longitudinal direction of the support member 19 for each excavation point 18 and the casing rotation preventing member 7 is provided with an engaging portion 24 with which the positioning protrusion 23 can be engaged. In the case where the positioning of the casing detent member 7 on the support members 19, 19 can be performed quickly and easily, whereby the construction can be performed more efficiently, and a large number of foundation piles are sequentially formed in a vertical or horizontal shape. The pile cores of a plurality of vertical or horizontal foundation piles can be accurately matched.

【0032】上述した実施の形態では、回転駆動装置1
の回転駆動軸3に掘削軸部材2を連結し、更にこの掘削
軸部材2の下部にダウンザホールハンマー4を連設した
例について説明したが、ダウンザホールハンマー4を使
用せず、掘削軸部材として、アースオーガ装置に使用さ
れるオーガスクリューを使用し、このオーガスクリュー
を回転駆動装置1の回転駆動軸3に連結するようにして
もよい。要するに、この回転駆動装置1の回転駆動軸3
に連結される掘削軸部材としては、地盤の掘削に使用さ
れる掘削用の軸部材であればよく、例えば先端に掘削ビ
ットを有する円筒状の回転ケーシングであってもよい。
In the above-described embodiment, the rotary drive 1
The example in which the excavation shaft member 2 is connected to the rotary drive shaft 3 and the down-the-hole hammer 4 is further provided below the excavation shaft member 2 has been described, but the down-the-hole hammer 4 is not used, and the excavation shaft member is grounded. An auger screw used in an auger device may be used, and the auger screw may be connected to the rotary drive shaft 3 of the rotary drive device 1. In short, the rotary drive shaft 3 of the rotary drive 1
The drilling shaft member to be connected to the base member may be a drilling shaft member used for excavating the ground, and may be, for example, a cylindrical rotary casing having a drilling bit at a tip.

【0033】また、ケーシング回り止め部材7として
は、上述した平板状に形成されたものに限らず、ケーシ
ング回り止め部材7を地盤上に水平に支持する支持部が
この回り止め部材7と一体に形成された構造のものでも
よい。
Further, the casing detent member 7 is not limited to the above-described plate-shaped member, and a supporting part for horizontally supporting the casing detent member 7 on the ground is integrated with the detent member 7. The formed structure may be used.

【0034】[0034]

【発明の効果】請求項1に係る発明の掘削装置は、昇降
可能に支持される回転駆動装置と、掘削ビットを有し、
回転駆動装置下部の回転駆動軸に連動連結される掘削軸
部材と、掘削地盤上の所定の掘孔箇所に水平に設置さ
れ、固定ケーシングを上下方向に自由に挿通させるが当
該固定ケーシングの回転を阻止するケーシング挿通孔を
形成したケーシング回り止め部材とを備えているため、
ケーシング回り止め部材によって回転駆動装置の回転反
力を受支させることができ、それによって従来装置のよ
うにリーダを使用することなく地盤の掘削を行うことが
でき、従ってリーダの使用に伴う種々の問題を解消する
ことができる。
According to the first aspect of the present invention, there is provided a drilling device including a rotary drive device supported to be able to move up and down, and a drill bit.
An excavation shaft member interlockingly connected to a rotary drive shaft at the lower portion of the rotary drive device, and is installed horizontally at a predetermined drill hole on the excavation ground, and allows the fixed casing to freely penetrate vertically, but rotates the fixed casing. Since it has a casing detent member formed with a casing insertion hole for blocking,
The casing anti-rotation member can receive the rotational reaction force of the rotary drive device, thereby excavating the ground without using a leader as in the conventional device, and therefore various types of operation accompanying the use of the leader are possible. The problem can be solved.

【0035】請求項2に係る発明によれば、固定ケーシ
ングが円筒状ケーシングからなるため、地盤への固定ケ
ーシングの打ち込み及び引き抜きが容易となり、またケ
ーシングの材料コストも、円筒状ケーシングの方が角筒
状ケーシングに比べ安価となる。
According to the second aspect of the present invention, the fixed casing is formed of a cylindrical casing, so that the fixed casing is easily driven into and out of the ground, and the material cost of the casing is smaller in the case of the cylindrical casing. It is cheaper than a cylindrical casing.

【0036】請求項3に係る発明によれば、ケーシング
回り止め部材は、平板状に形成されているため、鉄板等
によって簡単容易に製作することができる上、取り扱い
や運搬に便利である。また、このケーシング回り止め部
材は、掘削地盤上の掘孔箇所を挟んでその両側に水平に
敷設された長尺状の横向きH形鋼からなる一対の支持部
材上に載設固定されるようになっているため、多数の基
礎杭を縦または横列状に順次造成してゆくような場合
に、両支持部材を縦または横列状の掘孔箇所に沿って敷
設しておくことによって、1つの掘孔箇所での基礎杭の
造成を終えた後、ケーシング回り止め部材を両支持部材
に沿って所要ピッチ移動させてセットし、その位置に固
定ケーシングを位置決めできることになる。従って、基
礎杭の造成作業をきわめて能率良く行うことができると
共に、縦または横列状の複数の基礎杭の芯合わせを容易
に行うことができる。
According to the third aspect of the present invention, since the casing detent member is formed in a flat plate shape, it can be easily and easily manufactured using an iron plate or the like, and is convenient for handling and transportation. Further, the casing detent member is mounted and fixed on a pair of support members made of a long transversely shaped H-shaped steel laid horizontally on both sides of the excavated ground on the excavated ground. Therefore, in the case where many foundation piles are sequentially formed in a vertical or horizontal row, by laying both support members along the vertical or horizontal drill holes, one excavation is performed. After completing the formation of the foundation pile at the hole, the casing detent member is moved and set at a required pitch along both support members, and the fixed casing can be positioned at that position. Therefore, it is possible to extremely efficiently perform the work of forming the foundation pile, and it is possible to easily perform the centering of the plurality of vertical or horizontal foundation piles.

【0037】請求項4に係る発明によれば、ケーシング
回り止め部材は、両支持部材の長手方向と直交する方向
の分割線に沿って2分割された一対の半割板からなるた
め、ケーシング回り止め部材を支持部材上に取り付けに
あたって、一方の半割板を支持部材上の定位置に配置し
た後、固定ケーシングを当該一方の半割板のケーシング
挿通孔部分に挿通させ、しかる後他方の半割板のケーシ
ング挿通孔部分を固定ケーシングに嵌合させるようにす
ることによって、ケーシング回り止め部材のケーシング
挿通孔への固定ケーシングの挿通作業が容易となる。
According to the fourth aspect of the present invention, the casing detent member is formed of a pair of half plates divided into two along a dividing line in a direction orthogonal to the longitudinal direction of both support members. In mounting the stop member on the support member, one half plate is disposed at a fixed position on the support member, and then the fixed casing is inserted through the casing insertion hole of the one half plate, and then the other half plate is inserted. By fitting the casing insertion hole portion of the split plate into the fixed casing, the work of inserting the fixed casing into the casing insertion hole of the casing rotation preventing member becomes easy.

【0038】請求項5に係る発明によれば、両支持部材
の上面に、ケーシング回り止め部材を両支持部材間の中
心位置に位置決めするための複数の位置決め突起が、掘
孔箇所ごとに支持部材の長手方向所定ピッチで突設さ
れ、ケーシング回り止め部材には、上記位置決め突起が
係合可能な係合部が設けられているため、両支持部材上
へのケーシング回り止め部材の位置決めを迅速容易に行
え、それにより施工を一層能率良く行うことができると
共に、多数の基礎杭を縦または横列状に順次形成してゆ
くような場合に縦または横列状の複数の基礎杭の杭芯を
正確に合わせることができる。
According to the fifth aspect of the present invention, a plurality of positioning projections for positioning the casing detent member at the center position between the two support members are provided on the upper surface of the two support members for each of the excavation holes. The casing detent member is provided with an engaging portion with which the positioning protrusion can be engaged, so that the casing detent member can be quickly and easily positioned on both support members. It is possible to perform the construction more efficiently, and when many foundation piles are formed sequentially in a vertical or horizontal row, the pile cores of multiple vertical or horizontal foundation piles can be accurately positioned. Can be matched.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 本発明の掘削装置を示す全体側面図である。FIG. 1 is an overall side view showing an excavator according to the present invention.

【図2】 掘削装置の一部拡大側面図である。FIG. 2 is a partially enlarged side view of the excavator.

【図3】 (A)は、図2のX−X線断面図、(B)
は、図2のY−Y線断面図である。
3A is a sectional view taken along line XX of FIG. 2, FIG.
FIG. 3 is a sectional view taken along line YY of FIG. 2.

【図4】 支持部材上に載設されたケーシング回り止め
部材を示す平面図である。
FIG. 4 is a plan view showing a casing detent member mounted on a support member.

【図5】 ケーシング回り止め部材を形成する一対の半
割板を互いに分離した状態で示す平面図である。
FIG. 5 is a plan view showing a pair of half plates forming a casing detent member separated from each other.

【図6】 図5に示す両半割板の正面図である。FIG. 6 is a front view of the two halves shown in FIG. 5;

【図7】 一対の支持部材、この支持部材上に載設固定
されたケーシング回り止め部材、及びこのケーシング回
り止め部材のケーシング挿通孔に挿通される固定ケーシ
ングを示す斜視図である。
FIG. 7 is a perspective view showing a pair of support members, a casing detent member mounted and fixed on the support member, and a fixed casing inserted into a casing insertion hole of the casing detent member.

【符号の説明】[Explanation of symbols]

1 回転駆動装置 2 掘削軸部材 3 回転駆動装置の回転駆動軸 4 ダウンザホールハンマー 5 固定ケーシング 6 回転駆動装置の機枠 7 ケーシング回り止め部材 7a 半割板 7b 半割板 8 ケーシング挿通孔 8a 円形孔部 8b 係合用凹部 9 ブラケット 19 支持部材 23 位置決め突起 24 係合部 27 掘削ビット K クレーン車 M ブーム W 昇降操作用ワイヤー REFERENCE SIGNS LIST 1 rotary drive 2 excavating shaft member 3 rotary drive of rotary drive 4 down-the-hole hammer 5 fixed casing 6 machine frame of rotary drive 7 casing detent member 7a half plate 7b half plate 8 casing insertion hole 8a circular hole 8b Engagement recess 9 Bracket 19 Support member 23 Positioning projection 24 Engagement part 27 Drilling bit K Crane truck M Boom W Elevating operation wire

フロントページの続き (56)参考文献 特開 平7−238766(JP,A) 実開 昭58−16289(JP,U) 実開 昭53−108104(JP,U) 実開 平2−50487(JP,U) (58)調査した分野(Int.Cl.6,DB名) E21B 3/00 E21B 7/00 Continuation of the front page (56) References JP-A-7-238766 (JP, A) JP-A-58-16289 (JP, U) JP-A-53-108104 (JP, U) JP-A-2-50487 (JP, A) , U) (58) Fields investigated (Int. Cl. 6 , DB name) E21B 3/00 E21B 7/00

Claims (5)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 昇降可能に支持される回転駆動装置と、
先端に掘削ビットを有し、回転駆動装置下部の回転駆動
軸に一体回転可能に連結される掘削軸部材と、掘削軸部
材に套嵌されると共に、回転駆動装置の機枠に一体的に
垂下連結される固定ケーシングと、掘削すべき地盤上の
所定箇所に水平に設置され、固定ケーシングを上下方向
に自由に挿通させるが該固定ケーシングの回転を阻止す
ることができるケーシング挿通孔を有するケーシング回
り止め部材と、からなる掘削装置。
A rotary drive device supported so as to be movable up and down;
A drilling shaft member having a drilling bit at its tip and integrally rotatably connected to a rotary drive shaft at the lower portion of the rotary drive device; A fixed casing to be connected and a casing having a casing insertion hole which is horizontally installed at a predetermined place on the ground to be excavated and which allows the fixed casing to freely penetrate vertically but prevent rotation of the fixed casing. A drilling device comprising: a stopping member.
【請求項2】 固定ケーシングは円筒状のケーシングか
らなり、この円筒状固定ケーシングの外周面に係合用突
条部が長手方向全長に亘って条設されており、ケーシン
グ回り止め部材は、前記円筒状固定ケーシングが挿通可
能な円形孔部と、この円形孔部の内周部に凹設されてい
て前記係合用突条部が挿通可能な係合用凹部とからなる
ケーシング挿通孔を備えてなる請求項1に記載の掘削装
置。
2. The fixed casing comprises a cylindrical casing, and an engaging ridge is provided on the outer peripheral surface of the cylindrical fixed casing over the entire length in the longitudinal direction. And a casing insertion hole comprising a circular hole through which the fixed casing can be inserted, and an engagement recess formed in the inner periphery of the circular hole and through which the engagement ridge can be inserted. Item 1. The excavator according to Item 1.
【請求項3】 ケーシング回り止め部材は、平板状に形
成されていて、掘削地盤上の掘孔箇所を挟んでその両側
に水平に敷設された長尺状の横向きH形鋼からなる一対
の支持部材上に載設固定されるようになっている請求項
1または2に記載の掘削装置。
3. The casing detent member is formed in a flat plate shape and has a pair of support members made of a long transversely oriented H-section steel laid horizontally on both sides of a digging hole on the digging ground. The excavator according to claim 1, wherein the excavator is mounted and fixed on a member.
【請求項4】 ケーシング回り止め部材は、前記支持部
材の長手方向と直交する方向の分割線に沿って2分割さ
れた一対の半割板からなる請求項3に記載の掘削装置。
4. The excavator according to claim 3, wherein the casing detent member is composed of a pair of half plates divided into two along a dividing line in a direction orthogonal to a longitudinal direction of the support member.
【請求項5】 前記一対の支持部材の上面には、ケーシ
ング回り止め部材を両支持部材間の中心位置に位置決め
するための複数の位置決め突起が、掘孔箇所ごとに支持
部材長手方向所定ピッチで突設されており、ケーシング
回り止め部材には前記位置決め突起が係合可能な係合部
が設けられている請求項3または4に記載の掘削装置。
5. A plurality of positioning protrusions for positioning a casing detent member at a center position between the two support members on an upper surface of the pair of support members at a predetermined pitch in a longitudinal direction of the support member for each digging hole. The excavator according to claim 3, wherein the excavating device is provided with an engaging portion which is provided so as to be engageable with the positioning protrusion.
JP8006900A 1996-01-18 1996-01-18 Drilling rig Expired - Lifetime JP2981164B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8006900A JP2981164B2 (en) 1996-01-18 1996-01-18 Drilling rig

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8006900A JP2981164B2 (en) 1996-01-18 1996-01-18 Drilling rig

Publications (2)

Publication Number Publication Date
JPH09195655A JPH09195655A (en) 1997-07-29
JP2981164B2 true JP2981164B2 (en) 1999-11-22

Family

ID=11651115

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8006900A Expired - Lifetime JP2981164B2 (en) 1996-01-18 1996-01-18 Drilling rig

Country Status (1)

Country Link
JP (1) JP2981164B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3640371B2 (en) * 1998-09-07 2005-04-20 株式会社横山基礎工事 Rotating reaction force support device for drilling method
JP5645764B2 (en) * 2011-06-28 2014-12-24 青葉建機株式会社 Drilling equipment and drilling method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5226041B2 (en) 1973-06-04 1977-07-12
JPH052079B2 (en) 1987-03-10 1993-01-11 Asahi Engineering
JPH052078B2 (en) 1987-03-10 1993-01-11 Asahi Engineering
JPH0473517B2 (en) 1988-09-19 1992-11-20 Sun Tech Inc
JP3021162B2 (en) 1992-01-29 2000-03-15 三菱重工業株式会社 Drilling equipment for large diameter pits

Also Published As

Publication number Publication date
JPH09195655A (en) 1997-07-29

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