JPH09151685A - Hole drilling device - Google Patents
Hole drilling deviceInfo
- Publication number
- JPH09151685A JPH09151685A JP33584395A JP33584395A JPH09151685A JP H09151685 A JPH09151685 A JP H09151685A JP 33584395 A JP33584395 A JP 33584395A JP 33584395 A JP33584395 A JP 33584395A JP H09151685 A JPH09151685 A JP H09151685A
- Authority
- JP
- Japan
- Prior art keywords
- bit
- intermediate rod
- sliding cylinder
- rod
- expansion
- 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
Links
Landscapes
- Earth Drilling (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は孔壁の崩落を防止し
ながら穿孔する穿孔装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching device for punching while preventing the collapse of a hole wall.
【０００２】[0002]
【従来の技術】ＮＡＴＭ工法における地山補強工法とし
て、切羽前方の地山に長尺の管体を貫入させて地山を補
強する工法が知られている。この工法の採用にあたって
は、穿孔時に管体を挿入し、穿孔終了後に穿孔具を回収
する必要性から、拡縮自在のビットを備えた穿孔装置が
用いられる。この種の穿孔装置は、削岩機本体に接続さ
れる削孔ロッドと、削孔ロッドの先端に取り付けられる
先行ビットと、先行ビットの後方に拡縮自在に設けられ
るウィングビットを備えていて、管体を外装して穿孔す
る際、ウィングビットが管体の外径まで拡径し、装置を
回収する際はウィングビットが管体を内挿可能な径まで
縮径する構造になっている。2. Description of the Related Art As a natural ground reinforcement method in the NATM method, a method is known in which a long pipe is inserted into the natural ground in front of the face to reinforce the natural ground. In adopting this construction method, a punching device equipped with an expandable / retractable bit is used because it is necessary to insert a tubular body at the time of punching and to collect the punching tool after the completion of punching. This type of drilling device is equipped with a drilling rod connected to the rock drilling machine main body, a leading bit attached to the tip of the drilling rod, and a wing bit that is expandable and contractable behind the leading bit. The wing bit expands to the outer diameter of the pipe body when the body is exteriorized and perforated, and the wing bit reduces the pipe body diameter so that the pipe body can be inserted when the device is recovered.
【０００３】前記した従来の穿孔装置には次のような問
題点がある。 ＜イ＞ ウィングビットの拡縮機構が複雑で高価である
だけでなく打撃力を受けて拡縮機構が故障し易い。穿孔
時の衝撃によりウィングビットの拡縮機構が損傷し、穿
孔装置の円滑な抜き取りができない場合がある。 ＜ロ＞ ウィングビットの拡縮機構が複雑であるため孔
壁との間に削土の排出空間を十分に確保することが困難
で削土の排出性が悪い。The conventional punching device described above has the following problems. <A> Not only is the expansion / contraction mechanism of the wing bit complicated and expensive, but the expansion / contraction mechanism is prone to failure due to impact force. The expansion and contraction mechanism of the wing bit may be damaged by the impact at the time of punching, and the punching device may not be smoothly extracted. <B> Since the expansion and contraction mechanism of the wing bit is complicated, it is difficult to secure a sufficient soil discharge space between the wing bit and the hole wall, and the soil discharge performance is poor.
【０００４】[0004]
【発明が解決しようとする課題】本発明は回転運動と打
撃運動の伝達性の向上が図れ、しかも切削屑による影響
を回避して正確に作動する穿孔装置を提供することにあ
る。SUMMARY OF THE INVENTION It is an object of the present invention to provide a drilling device which can improve the transmissibility of a rotary motion and a striking motion and can operate accurately while avoiding the influence of cutting chips.
【０００５】[0005]
【問題点を解決するための手段】本発明は、削孔ロッド
の先端に接続し、周面に軸方向に沿って傾斜する複数の
軸溝を設けた中間ロッドと、中間ロッドの先端に接続し
た先端ビットと、中間ロッドに回転不能でかつ軸方向に
摺動可能に外装した摺動筒と、前記摺動筒に一体に形成
し、先端ビットの後方で先端ビットより大径の掘削径を
有する中間ビットと、摺動筒を貫挿して中間ロッドの軸
溝に摺動自在に嵌合し、中間ビットの後方で中間ビット
より大径の掘削径を有する拡縮ビットとを備えた先行装
置において、中間ロッドと摺動筒の各周面に、相互に嵌
合して軸方向の摺動を許容する複数の突条と係合溝を形
成すると共に、中間ロッドの環状鍔と摺動筒の端面に、
相互に嵌合して中間ロッドの回転運動を摺動筒に伝達す
る複数の突起体と切欠を夫々形成したことを特徴とす
る、穿孔装置である。さらに本発明は前記傾斜溝の底面
に清掃溝を形成すると共に、中間ロッド内部の軸路を前
記清掃溝に連通させ、傾斜溝内に常時清掃用の流体を吐
出可能に構成したことを特徴とする、穿孔装置である。
さらに本発明は、中間ロッドの後部にセンタリング機能
と排土機能を有するウィングを形成したことを特徴とす
る、穿孔装置である。According to the present invention, there is provided an intermediate rod which is connected to the tip of a drilled rod and has a plurality of axial grooves inclined along the axial direction on the peripheral surface, and an intermediate rod which is connected to the tip of the intermediate rod. The tip bit, the slide rod which is mounted on the intermediate rod so as to be non-rotatable and slidable in the axial direction, and the slide rod are integrally formed with each other, and a drilling diameter larger than the tip bit is formed behind the tip bit. In a preceding device including an intermediate bit having the same and an expansion / contraction bit having a drilling diameter larger than the intermediate bit behind the intermediate bit slidably fitted in the axial groove of the intermediate rod through the sliding cylinder. , The intermediate rod and the sliding cylinder are formed with a plurality of protrusions and engagement grooves which are fitted to each other and allow axial sliding, and the annular flange of the intermediate rod and the sliding cylinder are formed. On the end face,
A punching device, characterized in that a plurality of protrusions and cutouts that are fitted to each other to transmit the rotational movement of the intermediate rod to the sliding cylinder are formed. Furthermore, the present invention is characterized in that a cleaning groove is formed on the bottom surface of the inclined groove, and an axial path inside the intermediate rod is communicated with the cleaning groove so that a cleaning fluid can be constantly discharged into the inclined groove. It is a punching device.
Further, the present invention is the punching device, characterized in that a wing having a centering function and a soil discharging function is formed at the rear portion of the intermediate rod.
【０００６】[0006]
【発明の実施の形態１】以下図面を参照しながら本発明
の実施の形態について説明する。Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
【０００７】＜イ＞全体の説明 図１〜５に穿孔装置１０の一例を示す。図１において図
中符号２０は穿孔装置１０と共に地中に貫挿する管体
で、鋼管や樹脂パイプ、有孔管等の管体である。穿孔装
置１０の尾端には中空の削孔ロッド１１が接続してい
て、さらに削孔ロッド１１が図示しないボーリングマシ
ンに接続していて、穿孔装置１０に回転力と打撃力を付
与できるようになっている。<A> Overall Description FIGS. 1 to 5 show an example of the punching device 10. In FIG. 1, reference numeral 20 in the drawing is a tubular body that is inserted into the ground together with the punching device 10, and is a tubular body such as a steel pipe, a resin pipe, or a perforated pipe. A hollow drilling rod 11 is connected to the tail end of the drilling device 10, and the drilling rod 11 is further connected to a boring machine (not shown) so that the drilling device 10 can be given a rotational force and a striking force. Has become.
【０００８】＜ロ＞穿孔装置 穿孔装置１０は先端ビット１２と、先端ビット１２の後
方に位置する中間ビット１３と、中間ビット１３の後方
で拡縮自在に配置された拡縮ビット１４とを具備してい
る。これらは図２に示すように先端ビット１２、中間ビ
ット１３、拡縮ビット１４の順に穿孔径が段階的に大き
く設定されている。先端ビット１２と中間ビット１３の
穿孔径は管体２０の内径以下に設定されていて、また拡
縮ビット１４の穿孔径は管体２０の外径とほぼ等しい最
大径から、管体２０の内径以下の最小径の範囲で拡縮す
るように設定されている。図１に示す先端ビット１２は
クロスビット等の公知のビットで、穿孔地盤に応じて適
宜選択して使用される。先端ビット１２は軸路３１を有
する中間ロッド３０の一端にストッパリング１６を介し
て螺着され、中間ロッド３０の他端に螺着した削孔ロッ
ド１１の運動（回転と打撃）が先端ビット１２へ伝達さ
れる。またこれらの削孔ロッド１１，中間ロッド３０に
は連続した軸路１５，３１が形成されていて、削孔ロッ
ド１１のボーリングマシン側から供給した水やエア等を
先端ビット１２の放出路１７から吐出できるようになっ
ている。<B> Punching device The punching device 10 is provided with a tip bit 12, an intermediate bit 13 located behind the tip bit 12, and an expansion / contraction bit 14 arranged behind the intermediate bit 13 so as to be expandable / contractible. There is. As shown in FIG. 2, the tip bit 12, the intermediate bit 13, and the expansion / contraction bit 14 are set such that the perforation diameter is gradually increased in order. The drilling diameters of the tip bit 12 and the intermediate bit 13 are set to be equal to or less than the inner diameter of the pipe body 20, and the drilling diameter of the expansion / contraction bit 14 is from the maximum diameter substantially equal to the outer diameter of the pipe body 20 to the inner diameter of the pipe body 20 or less. It is set to expand and contract within the range of the minimum diameter of. The tip bit 12 shown in FIG. 1 is a well-known bit such as a cross bit, and is appropriately selected and used according to the drilling ground. The tip bit 12 is screwed to one end of an intermediate rod 30 having an axial path 31 via a stopper ring 16, and the movement (rotation and impact) of the drilling rod 11 screwed to the other end of the intermediate rod 30 causes the tip bit 12 to move. Transmitted to. Further, continuous shaft paths 15 and 31 are formed in the hole drilling rod 11 and the intermediate rod 30, and water, air, etc. supplied from the boring machine side of the hole drilling rod 11 are discharged from the discharge path 17 of the tip bit 12. It can be discharged.
【０００９】＜ハ＞摺動筒 図３は穿孔装置１０の組立図を示すもので、中間ロッド
３０に摺動筒４０が摺動自在に外装されていて、中間ロ
ッド３０の外周面に突設した環状鍔３２が摺動筒４０の
穿孔方向と反対方向の戻り位置を規制している。摺動筒
４０は穿孔方向の端面に複数の中間ビット１３を形成し
ていて、さらに摺動筒３０の途上に円周方向に沿って拡
縮ビット挿通用の複数の窓穴４１が開設されている。ま
た中間ビット１３や窓穴４１の形成位置を除いた摺動筒
４０の内・外周面に、軸線方向に沿って複数の係合溝４
３と排出溝４２とが夫々形成されていると共に、排出溝
４２の形成位置を除いた摺動筒４０の基端側の端部に、
複数の切欠４４が形成されている。<C> Sliding Cylinder FIG. 3 is an assembly view of the punching device 10. The sliding cylinder 40 is slidably mounted on the intermediate rod 30, and the sliding rod 40 is projected on the outer peripheral surface of the intermediate rod 30. The annular collar 32 regulates the return position of the sliding cylinder 40 in the direction opposite to the drilling direction. The sliding cylinder 40 has a plurality of intermediate bits 13 formed on the end face in the drilling direction, and a plurality of window holes 41 for inserting the expansion / contraction bit are provided along the circumferential direction along the sliding cylinder 30. . Further, a plurality of engaging grooves 4 are formed along the axial direction on the inner and outer peripheral surfaces of the sliding cylinder 40 excluding the positions where the intermediate bit 13 and the window hole 41 are formed.
3 and the discharge groove 42 are formed respectively, and at the end of the sliding cylinder 40 on the base end side except the position where the discharge groove 42 is formed,
A plurality of notches 44 are formed.
【００１０】＜ニ＞中間ロッド 図１、３に示すように中間ロッド３０の外周面の途中に
大径の環状鍔３２が形成されている。中間ロッド３０の
環状鍔３２より先端ビット１２側の外周面には、軸線に
沿って複数の傾斜溝３４が穿設されていると共に、傾斜
溝３４の間に前記摺動筒４０の係合溝４３と対応する位
置に複数の突条３８が形成されている。摺動筒４０と当
接する環状鍔３２の側面には、前記摺動筒４０の切欠４
４と対応する位置に複数の突起体３９が形成されてい
る。（図５参照） 各傾斜溝３４はブロック形の拡縮ビット１４を収容する
たの溝で、環状鍔３２から先端ビット１２へ向けて徐々
に深さを増すように一定の勾配が付与されている。さら
に各傾斜溝３４の底面には、傾斜溝３４に沿って連続し
た清掃溝３５が凹設されていると共に、各排除溝３５の
上流部と軸路３１の間が接続孔３６を通じて連通してい
て、軸路３１内の水やエア等の一部を分岐させて傾斜溝
３４の全体へ供給できるようになっている。これは、切
削屑等が傾斜溝３４内に進入するのを防止し、拡縮ビッ
ト１４を円滑に摺動させるためである。また中間ロッド
３０の環状鍔３２の後方外周面には、複数の螺旋状のウ
ィング３７が突設されている。ウィング３７は管体２０
に対する中間ロッド３０のセンタリング作用と、スライ
ムを含む切削屑の排出作用を併有する部材で、その突出
長は管体２０の内径とほぼ等しい寸法に設定されてい
る。尚、ウィング３７を省略する場合もある。また中間
ロッド３０の環状鍔３２の外周面には、軸線方向に沿っ
て連続した排出溝３３が凹設されていて、前記排出溝４
２と協働して掘削屑を基端側へ排出できるようになって
いる。<D> Intermediate Rod As shown in FIGS. 1 and 3, a large-diameter annular collar 32 is formed in the middle of the outer peripheral surface of the intermediate rod 30. A plurality of inclined grooves 34 are bored along the axis of the outer peripheral surface of the intermediate rod 30 on the side of the tip bit 12 with respect to the annular flange 32, and the engaging grooves of the sliding cylinder 40 are provided between the inclined grooves 34. Plural ridges 38 are formed at positions corresponding to 43. On the side surface of the annular collar 32 that abuts on the sliding cylinder 40, the notch 4 of the sliding cylinder 40 is provided.
A plurality of protrusions 39 are formed at positions corresponding to 4. (Refer to FIG. 5) Each inclined groove 34 is a groove for accommodating the block-shaped expansion / contraction bit 14, and is provided with a constant gradient so that the depth gradually increases from the annular flange 32 toward the tip bit 12. . Further, a cleaning groove 35 continuous along the inclined groove 34 is provided on the bottom surface of each inclined groove 34, and the upstream portion of each exclusion groove 35 and the axial path 31 communicate with each other through a connection hole 36. Thus, a part of water, air, etc. in the shaft 31 can be branched and supplied to the entire inclined groove 34. This is to prevent cutting chips and the like from entering the inclined groove 34 and allow the expansion / contraction bit 14 to slide smoothly. Further, a plurality of spiral wings 37 are provided on the rear outer peripheral surface of the annular flange 32 of the intermediate rod 30 so as to project. Wing 37 is tubular body 20
Is a member that has both the centering function of the intermediate rod 30 and the discharging function of cutting chips including slime, and the protruding length thereof is set to be substantially equal to the inner diameter of the tubular body 20. The wing 37 may be omitted. A discharge groove 33, which is continuous along the axial direction, is provided on the outer peripheral surface of the annular flange 32 of the intermediate rod 30, and the discharge groove 4 is provided.
The cutting waste can be discharged to the base end side in cooperation with 2.
【００１１】＜ホ＞中間ロッドと摺動筒の嵌合構造 中間ロッド３０は摺動筒４０の摺動を許容しつつ、摺動
筒４０へ回転力を伝達することが要求される。この要求
を満たすため、本発明では中間ロッド３０の突条３８を
摺動筒４０の係合溝４３に嵌合させる第１嵌合構造と、
中間ロッド３０の突起体３９を摺動筒４０の切欠４４に
嵌合させる第２嵌合構造の２つの嵌合手段を組み合わせ
てた。砂質層等の軟質地盤を掘削するのであれば、第１
嵌合構造のみで対処できるが、岩盤等の硬質地盤を掘削
する場合、大きな回転トルクや衝撃力が繰り返し作用す
ることから、第１嵌合構造のみでは中間ロッド３０の突
条３８と摺動筒４０の係合溝４３の嵌合部が早期に摩滅
したりヘタリを起こしたり、摺動筒４０の摺動抵抗が増
して拡縮ビット１４の拡縮動作が不確実となるおそれが
ある。第１嵌合構造の寿命を延ばす方法としては、突条
３８と係合溝４３の形成数を増す方法が考えられるが、
傾斜溝３４や拡縮ビット１４の存在により制約があり、
これらを増やす設計が困難である。本発明はこの点に鑑
み、第１嵌合手段と第２嵌合手段を組み合わせること
で、大きな回転トルクや衝撃力が繰り返し作用しても、
嵌合部のヘタリや摩滅を回避して、打撃力と回転力を効
率良く伝達できる構造を提供するものである。<E> Interfitting Structure of Intermediate Rod and Sliding Cylinder The intermediate rod 30 is required to allow the sliding of the sliding cylinder 40 while transmitting the rotational force to the sliding cylinder 40. To meet this requirement, in the present invention, a first fitting structure for fitting the protrusion 38 of the intermediate rod 30 into the engagement groove 43 of the sliding cylinder 40,
The two fitting means of the second fitting structure for fitting the projection 39 of the intermediate rod 30 into the notch 44 of the sliding cylinder 40 are combined. If excavating soft ground such as sandy layers,
Although it can be dealt with only by the fitting structure, when excavating hard ground such as rock, a large rotating torque and impact force repeatedly act, and therefore only the first fitting structure causes the protrusion 38 of the intermediate rod 30 and the sliding cylinder to be moved. There is a possibility that the fitting portion of the engaging groove 43 of 40 may be worn out or settled at an early stage, or the sliding resistance of the sliding cylinder 40 may increase to make the expansion / contraction operation of the expansion / contraction bit 14 uncertain. As a method of extending the life of the first fitting structure, a method of increasing the number of formed protrusions 38 and engagement grooves 43 is conceivable.
There are restrictions due to the existence of the inclined groove 34 and the expansion / contraction bit 14,
It is difficult to design to increase these. In view of this point, the present invention combines the first fitting means and the second fitting means so that even if a large rotational torque or impact force is repeatedly applied,
It is intended to provide a structure capable of efficiently transmitting a striking force and a rotating force while avoiding the fitting portion from being worn or worn.
【００１２】＜ヘ＞拡縮ビット 図３，４に拡縮ビット１４の装着構造を示す。拡縮ビッ
ト１４はチップ１４ａを埋設した本体部１４ｂと、本体
部１４ｂより大形に形成し、窓穴４１からの抜け出しを
規制する矩形の裾部１４ｃとからなり、裾部１４ｃが中
間ロッド３０の傾斜溝３４に摺動自在に嵌合され、本体
部１４ｂが摺動筒４０の窓穴４１に貫挿され、摺動筒４
０の摺動に伴い拡縮ビット１４が傾斜溝３４内を摺動し
て窓穴４１からのビット突出量が変化するようになって
いる。すなわち、図１に示す摺動筒４０が環状鍔３２に
当接したとき拡縮ビット１４の突出量が中間ビット１３
の径を越えて最大となり、反対に摺動筒４０が先端ビッ
ト１２方向に摺動するにしたがって拡縮ビット１４が後
退し、最小で管体２０の内径以下まで縮径することにな
る。また傾斜溝３４に嵌合された拡縮ビット１４の本体
部１４ｂの前端がストッパリング１６に当接すること
で、摺動筒４０の先端ビット１２方向への戻り位置が規
制される。尚、上記した拡縮ビット１４の嵌合構造は例
示であってこれに限定されるものではなく、要は摺動を
許容しつつ抜け出しを規制できる構造であればよく、公
知の各種嵌合構造を採用できる。<F> Expansion / contraction bit FIGS. 3 and 4 show the mounting structure of the expansion / contraction bit 14. The expansion / contraction bit 14 is composed of a main body portion 14b in which a chip 14a is embedded, and a rectangular hem portion 14c which is formed larger than the main body portion 14b and regulates the escape from the window hole 41. The slidable groove 34 is slidably fitted, and the main body portion 14b is inserted into the window hole 41 of the sliding cylinder 40.
With the sliding of 0, the expansion / contraction bit 14 slides in the inclined groove 34 so that the bit protrusion amount from the window hole 41 changes. That is, when the sliding cylinder 40 shown in FIG.
The maximum value is exceeded, and conversely, as the sliding cylinder 40 slides in the direction of the tip bit 12, the expansion / contraction bit 14 retracts, and the diameter is reduced to at least the inner diameter of the tubular body 20. Further, the front end of the main body portion 14b of the expansion / contraction bit 14 fitted in the inclined groove 34 comes into contact with the stopper ring 16, whereby the return position of the sliding cylinder 40 toward the tip bit 12 is regulated. Note that the fitting structure of the expansion / contraction bit 14 described above is an example, and the fitting structure is not limited to this. In essence, any structure may be used as long as it is a structure capable of restricting slipping out while allowing sliding. Can be adopted.
【００１３】[0013]
【作用】つぎに穿孔方法について説明する。Next, the perforation method will be described.
【００１４】＜イ＞穿孔・管体の挿入 図１は穿孔時を示すもので、管体２０に内挿した削孔ロ
ッド１１の基端から回転力と打撃力を付与すると共に、
軸路１５を通じてエアや水等の供給を開始する。 この
とき摺動筒４０は環状鍔３２に当接するまで後退し、拡
縮ビット１４が傾斜溝３４の浅瀬側に摺動して最大径ま
で突出している。中間ロッド３０に打撃力が伝わると、
突起体３９を含む環状鍔３２の側面を通じて摺動筒４０
へ伝えられ、最終的に中間ビット１３と拡縮ビット１４
へ伝えられる。また中間ロッド３０に回転力が伝えられ
ると、中間ロッド３０の突条３８、突起体３９に夫々係
合溝４３、切欠４４を介して嵌合する摺動筒４０へ効率
良く伝わった後、中間ビット１３と拡縮ビット１４へ伝
えられる。このように、各ビット１２〜１４へ効率良く
回転力と打撃力とが伝わると共に、管体２０の断面を異
径の三種類のビット１２〜１４で削孔負担を分担しなが
ら穿孔することになる。一方、軸路１５，３１を通じて
供給された水やエアの一部は接続孔３６を通じて傾斜溝
３４内の清掃溝３５へ吐出され、傾斜溝３４に進入しよ
うとする掘削屑を排除し続ける。またスライム化した掘
削屑は摺動筒４０と中間ロッド３０の各排出溝３３，４
２を経て管体２０内に取り込まれ、さらにウィング３７
で以て管体２０の基端側へ排出される。このように穿孔
装置１０による穿孔作業と並行して管体２０を地中に挿
入する。<A> Drilling / insertion of tubular body FIG. 1 shows the time of drilling, in which a rotational force and a striking force are applied from the base end of the drilling rod 11 inserted in the tubular body 20.
Supply of air, water, etc. is started through the shaft 15. At this time, the sliding cylinder 40 retracts until it comes into contact with the annular collar 32, and the expansion / contraction bit 14 slides on the shallow side of the inclined groove 34 and projects to the maximum diameter. When the striking force is transmitted to the intermediate rod 30,
The sliding cylinder 40 is passed through the side surface of the annular collar 32 including the protrusion 39.
And finally bit 13 and scaling bit 14
Conveyed to. Further, when the rotational force is transmitted to the intermediate rod 30, the rotational force is efficiently transmitted to the sliding cylinder 40 fitted into the protrusion 38 and the projection 39 of the intermediate rod 30 through the engaging groove 43 and the notch 44, respectively, and then the intermediate It is transmitted to bit 13 and scaling bit 14. As described above, the rotating force and the striking force are efficiently transmitted to each of the bits 12 to 14, and the cross section of the tubular body 20 is bored while the drilling load is shared by the three types of bits 12 to 14 having different diameters. Become. On the other hand, part of the water or air supplied through the shaft paths 15 and 31 is discharged to the cleaning groove 35 in the inclined groove 34 through the connection hole 36, and the excavated debris attempting to enter the inclined groove 34 is continuously removed. Further, the slimmed cutting waste is discharged into the slide cylinder 40 and the discharge grooves 33, 4 of the intermediate rod 30.
2 is taken into the tubular body 20 and further the wing 37
Therefore, it is discharged to the base end side of the tubular body 20. In this way, the pipe body 20 is inserted into the ground in parallel with the punching work by the punching device 10.
【００１５】＜ロ＞装置の回収 所定の深さまで穿孔したら、図１の管体２０をそのまま
にし削孔ロッド１１のみに引抜力を与える。すると図６
に示すように拡縮ビット１４が摺動筒４０と共に先端ビ
ット１２側へ摺動する。摺動筒４０の摺動に伴い、摺動
筒４０に嵌挿する各拡縮ビット１４は傾斜溝３４の深部
側へ移動することで徐々に摺動筒４０の窓穴４１内に後
退し、拡縮ビット１４がストッパリング１６に当接する
と、拡縮ビット１４は管体２０の内径以下まで縮径する
ことになる。このように削孔ロッド１１に引抜力を与え
て拡縮ビット１４を縮径させ、穿孔装置１０を回収す
る。地中に残置した管体２０は薬液注入管として或いは
フォアパイル等として要する。<B> Recovery of Device After drilling to a predetermined depth, the pipe body 20 of FIG. Then Fig. 6
As shown in, the expansion / contraction bit 14 slides together with the sliding cylinder 40 toward the tip bit 12 side. As the sliding cylinder 40 slides, each expansion / contraction bit 14 inserted into the sliding cylinder 40 moves to the deep side of the inclined groove 34, thereby gradually retracting into the window hole 41 of the sliding cylinder 40 and expanding / contracting. When the bit 14 comes into contact with the stopper ring 16, the expansion / contraction bit 14 is reduced in diameter to the inner diameter of the tube body 20 or less. In this way, the punching rod 11 is pulled out to reduce the diameter of the expansion / contraction bit 14, and the punching device 10 is recovered. The tube body 20 left in the ground is required as a chemical solution injection tube or a fore pile.
【００１６】[0016]
【発明の実施の形態２】中間ロッド３０は削孔ロッド１
１で代用しても良い。また中間ロッド３０と摺動筒４０
の嵌合構造は凹凸の組み合わせを逆にしてもよい。すな
わち、摺動筒４０に突条を形成すると共に中間ロッド３
０側に係合溝を形成したり、、摺動筒４０に突起体を形
成し、中間ロッド３０の環状鍔３２側に切欠を形成して
もよい。Embodiment 2 The intermediate rod 30 is the hole drilling rod 1
1 may be substituted. In addition, the intermediate rod 30 and the sliding cylinder 40
The fitting structure may be formed by reversing the combination of irregularities. That is, a protrusion is formed on the sliding cylinder 40 and the intermediate rod 3
The engaging groove may be formed on the 0 side, or the protrusion may be formed on the sliding cylinder 40, and the notch may be formed on the annular flange 32 side of the intermediate rod 30.
【００１７】[0017]
【発明の効果】本発明は以上説明したようになるから次
のような効果を得ることができる。 ＜イ＞ 中間ロッドと摺動筒の間を２種類の嵌合手段で
嵌合させたので、大きな回転力や打撃力を与えても嵌合
部が摩滅したりヘタリを起こさずに確実にこれらの運動
を伝達できるため、装置の耐久性が向上する。 ＜ロ＞ 傾斜溝内に清掃溝を設けて掘削屑の進入を阻止
できるため、拡縮ビットの摺動が円滑となり拡縮ビット
の拡縮を確実に行える。 ＜ハ＞ 中間ロッドに設けたウィングにより削孔時にセ
ンタリングを図れると共に、排土性能が向上する。As described above, the present invention has the following effects. <a> Since the intermediate rod and the sliding cylinder are fitted by two kinds of fitting means, even if a large rotating force or striking force is given, the fitting portion is surely worn without being worn or settling. Since the movement of can be transmitted, the durability of the device is improved. <B> Since the cleaning groove is provided in the inclined groove to prevent the intrusion of the cutting waste, the expansion / contraction bit slides smoothly, and the expansion / contraction bit can be expanded / contracted reliably. <C> The wings provided on the intermediate rod allow centering at the time of drilling and improve soil removal performance.
【図１】 穿孔装置の縦断面図FIG. 1 is a vertical cross-sectional view of a punching device.
【図２】 図１におけるII−IIの矢視図FIG. 2 is a view of II-II in FIG.
【図３】 穿孔装置の分解図FIG. 3 Exploded view of the punching device
【図４】 図１におけるIV−IVの断面図FIG. 4 is a sectional view taken along line IV-IV in FIG.
【図５】 中間ロッドと摺動筒の嵌合部の部分拡大図FIG. 5 is a partially enlarged view of a fitting portion between the intermediate rod and the sliding cylinder.
【図６】 拡縮ビットの縮径時における穿孔装置の縦断
面図FIG. 6 is a vertical sectional view of the punching device when the expansion / contraction bit is reduced in diameter.
１０ 穿孔装置， １１ 削孔ロッド， １２ 先
端ビット，１３ 中間ビット， １４ 拡縮ビット
１５ 軸路， ２０ 管体，３０ 中間ロッド，
３１ 軸路， ３２ 環状鍔， ３３ 排出溝．
３４ 傾斜溝， ３５ 清掃溝， ３６ 接続孔，
３７ ウィング，３８ 突条， ３９ 突起体，
４０ 摺動筒， ４１ 窓穴，４２ 排出溝，
４３ 係合溝， ４４ 切欠，10 drilling device, 11 drilling rod, 12 tip bit, 13 intermediate bit, 14 expansion / contraction bit
15 shafts, 20 tubes, 30 intermediate rods,
31 shaft path, 32 annular collar, 33 discharge groove.
34 inclined groove, 35 cleaning groove, 36 connection hole,
37 wings, 38 ridges, 39 protrusions,
40 sliding cylinder, 41 window hole, 42 discharge groove,
43 engagement groove, 44 notch,
───────────────────────────────────────────────────── フロントページの続き (72)発明者 岩村 巖 東京都渋谷区渋谷１丁目16番14号 東急建 設株式会社内 (72)発明者 伊藤 久雄 東京都渋谷区渋谷１丁目16番14号 東急建 設株式会社内 (72)発明者 鈴木 祥三 東京都渋谷区渋谷１丁目16番14号 東急建 設株式会社内 (72)発明者 平川 邦彦 東京都渋谷区渋谷１丁目16番14号 東急建 設株式会社内 (72)発明者 梅本 保博 東京都中野区中央１−29−15 鉱研工業株 式会社内 (72)発明者 小林 直 神奈川県川崎市幸区堀川町580番地ソリッ ドスクエア 東芝タンガロイ株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Iwamura Iwamura 1-16-14, Shibuya, Shibuya-ku, Tokyo Tokyu Construction Co., Ltd. (72) Hisao Ito 1-16-14, Shibuya, Shibuya-ku, Tokyo Tokyu Construction company (72) Inventor Shozo Suzuki 1-16-14 Shibuya, Shibuya-ku, Tokyo Tokyu Construction Co., Ltd. (72) Inventor Kunihiko Hirakawa 1-1-16 Shibuya, Shibuya-ku, Tokyo Construction Tokyu Co., Ltd. (72) Inventor Yasuhiro Umemoto Minor Industrial Co., Ltd. 1-29-15 Chuo, Nakano-ku, Tokyo Co., Ltd. In the company
Claims (3)
方向に沿って傾斜する複数の軸溝を設けた中間ロッド
と、中間ロッドの先端に接続した先端ビットと、中間ロ
ッドに回転不能でかつ軸方向に摺動可能に外装した摺動
筒と、前記摺動筒に一体に形成し、先端ビットの後方で
先端ビットより大径の掘削径を有する中間ビットと、摺
動筒を貫挿して中間ロッドの軸溝に摺動自在に嵌合し、
中間ビットの後方で中間ビットより大径の掘削径を有す
る拡縮ビットとを備えた先行装置において、 中間ロッドと摺動筒の各周面に、相互に嵌合して軸方向
の摺動を許容する複数の突条と係合溝を形成すると共
に、 中間ロッドの環状鍔と摺動筒の端面に、相互に嵌合して
中間ロッドの回転運動を摺動筒に伝達する複数の突起体
と切欠を夫々形成したことを特徴とする、 穿孔装置。1. An intermediate rod, which is connected to the tip of a drilling rod and has a plurality of shaft grooves that are inclined along the axial direction on the peripheral surface, a tip bit connected to the tip of the intermediate rod, and a rotation on the intermediate rod. A sliding cylinder that is immovably and slidably mounted in the axial direction, and an intermediate bit that is integrally formed with the sliding cylinder and that has an excavation diameter larger than the tip bit behind the tip bit and the sliding cylinder. It is inserted and slidably fitted in the shaft groove of the intermediate rod,
In a preceding device equipped with an expansion / contraction bit having an excavation diameter larger than the intermediate bit behind the intermediate bit, the intermediate rod and the sliding cylinder are fitted to each other on their peripheral surfaces to allow sliding in the axial direction. A plurality of protrusions and engaging grooves, and a plurality of protrusions that are fitted to each other on the annular flange of the intermediate rod and the end surface of the sliding cylinder to transmit the rotational movement of the intermediate rod to the sliding cylinder. A punching device characterized by forming notches respectively.
に清掃溝を形成すると共に、中間ロッド内部の軸路を前
記清掃溝に連通させ、傾斜溝内に常時清掃用の流体を吐
出可能に構成したことを特徴とする、穿孔装置。2. The cleaning groove according to claim 1, wherein a cleaning groove is formed on a bottom surface of the inclined groove, and an axial path inside the intermediate rod is communicated with the cleaning groove so that a cleaning fluid can be constantly discharged into the inclined groove. A punching device characterized by being configured.
ロッドの後部にセンタリング機能と排土機能を有するウ
ィングを形成したことを特徴とする、穿孔装置。3. The punching device according to claim 1, wherein a wing having a centering function and a soil discharging function is formed at a rear portion of the intermediate rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33584395A JP3718824B2 (en) | 1995-11-30 | 1995-11-30 | Drilling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33584395A JP3718824B2 (en) | 1995-11-30 | 1995-11-30 | Drilling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09151685A true JPH09151685A (en) | 1997-06-10 |
| JP3718824B2 JP3718824B2 (en) | 2005-11-24 |
Family
ID=18293022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33584395A Expired - Fee Related JP3718824B2 (en) | 1995-11-30 | 1995-11-30 | Drilling device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3718824B2 (en) |
-
1995
- 1995-11-30 JP JP33584395A patent/JP3718824B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3718824B2 (en) | 2005-11-24 |
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