JP5228235B2 - Cutting bit of ground cutting device - Google Patents
Cutting bit of ground cutting device Download PDFInfo
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- JP5228235B2 JP5228235B2 JP2009274945A JP2009274945A JP5228235B2 JP 5228235 B2 JP5228235 B2 JP 5228235B2 JP 2009274945 A JP2009274945 A JP 2009274945A JP 2009274945 A JP2009274945 A JP 2009274945A JP 5228235 B2 JP5228235 B2 JP 5228235B2
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鋼管内の中心軸線上に備えた排土オーガ、エアーハンマー、エアーハンマーの先端に備えた削進ビット等を回転手段で正逆回転自在に回転駆動し、先端を前記削進ビットの後端に回転自在に連結した先頭の鋼管とそれに接続した鋼管を他の回転手段で正逆回転自在に回転駆動するように備え、前記先頭の鋼管の先端に削進用のクラウンビットを備えたものである地盤の削進装置において、The earthing auger provided on the central axis in the steel pipe, the air hammer, the cutting bit provided at the tip of the air hammer, etc. are rotated by a rotating means so that the forward and reverse rotation is possible, and the tip is set at the rear end of the cutting bit. A leading steel pipe connected in a freely rotatable manner and a steel pipe connected thereto are rotatably driven by other rotating means so as to rotate forward and backward, and a tip of the leading steel pipe is provided with a cutting crown bit. In the ground cutting device,
前記削進ビットを、削進ビット本体に頂面部、傾斜面、基部面を形成したビットガイド部を設けた削進ビット本体を備えると共に、正面ビット部、底面部、縮小ガイド面を設けた1対の拡縮ビット半体を別設し、前記1対の拡縮ビット半体を削進ビット本体の各ビットガイド部の傾斜面に沿い上方摺動自在に備えて構成したものであり、
前記削進ビット本体の頂面部と各拡縮ビット半体の正面ビット部を揃えた状態、即ち、頂面部と各正面ビット部で形成される円の径を鋼管の外径より大の状態として、削進ビットの回転駆動で鋼管の外径より大径の孔を削進するように備え、また、各拡縮ビット半体を各傾斜面に沿い頂面部方向へ摺動し、各正面ビット部で形成される円の径を鋼管の内径より小に縮小した状態として、削進ビットの鋼管内へ引戻し、若しくは発進坑内へ引戻して交換補修し、または、削進ビットを鋼管内へ引戻した状態でのクラウンビットによる削進を自在に行えるよう備えたものであり、
もって、種々の地盤、対象物等の削進、孔あけ、鋼管埋設等を自在に行えるようにしたことを特徴とする、地盤の削進装置の削進ビットを提供する。The cutting bit is provided with a cutting bit main body provided with a bit guide portion having a top surface portion, an inclined surface, and a base surface formed on the cutting bit main body, and provided with a front bit portion, a bottom surface portion, and a reduction guide surface. A pair of expansion / contraction bit halves are provided separately, and the pair of expansion / contraction bit halves are configured to be slidable upward along the inclined surface of each bit guide portion of the cutting bit body,
A state where the top surface portion of the cutting bit body and the front bit portion of each expansion / contraction bit half body are aligned, that is, a state where the diameter of the circle formed by the top surface portion and each front bit portion is larger than the outer diameter of the steel pipe, Rotating drive of the cutting bit is provided to cut a hole having a diameter larger than the outer diameter of the steel pipe, and each expansion / contraction bit half body is slid along the inclined surface toward the top surface portion. In a state where the diameter of the formed circle is reduced to be smaller than the inner diameter of the steel pipe, it is pulled back into the steel pipe of the cutting bit, or pulled back into the starting pit and replaced or repaired, or the cutting bit is pulled back into the steel pipe It is equipped to be able to freely machine with the crown bit of
Accordingly, there is provided a cutting bit of a ground cutting device characterized in that various grounds, objects and the like can be freely drilled, drilled, and steel pipes can be freely embedded.
上下水道、ガス、電気・電話線、その他の各種の管を地中に埋設工事する場合、特に、都市市街地においては地表、道路等を開削せず、また道路交通を遮断せずに行うことが必要とされており、よって、通常、道路脇等に発進立杭を設け、該立坑内に削進装置を設置して削進埋設を行っている。
然して、削進ビットの回転とエアーハンマーの打撃若しくは振動発生装置による振動負荷等による削進装置による場合、通常の地盤を削進するにはあまり問題ないが、例えば、軟弱な地盤、岩盤、砂層、玉石層、それらの互層地盤等や、地盤中に松杭、コンクリートパイル、ライナープレート、鋼材等の埋設物があったり、また、既設の人孔(例、マンホール、ヒューム管等)に行き当ったりした場合や、既設管、マンホール等に枝管を取付ける場合等には、この破砕方式の削進装置では対応しにくい課題があり、そのような場合には、先頭の鋼管にクラウンビットを取付け、該クラウンビットにより切削削進する方が適しているが、従来は、前記削進ビットによる破砕削進からクラウンビットによる切削削進に切り替える場合には、一旦、削進ビット、エアーハンマー、オーガー等及び全ての鋼管を発進坑へ引戻すか、或は地上側から削進ビットの位置まで開削して削進ビット等を取外さねばならぬため、多くの手数と時間要し極めて非効率な課題があった。When embedding water and sewage, gas, electricity / telephone lines, and other various pipes in the ground, especially in urban areas, the ground surface, roads, etc. should not be excavated and road traffic blocked. Therefore, usually, a starting vertical pile is provided on the side of a road, etc., and a cutting device is installed in the shaft, and the cutting is buried.
However, in the case of using a cutting device by turning a cutting bit and hitting with an air hammer or a vibration load by a vibration generating device, there is not much problem in cutting normal ground, but for example, soft ground, bedrock, sand layer , Cobblestone layers, alternate layers of the ground, pine piles, concrete piles, liner plates, steel and other buried objects in the ground, and also hit existing human holes (eg manholes, fume pipes, etc.) If this happens, or if branch pipes are installed in existing pipes, manholes, etc., there are issues that are difficult to handle with this crushing type cutting device. In such cases, a crown bit is attached to the leading steel pipe. , It is more suitable to cut with the crown bit, but conventionally, when switching from crushing and cutting with the cutting bit to cutting with the crown bit, A lot of maneuvers are required because the bit, air hammer, auger, etc. and all steel pipes have to be pulled back to the start pit, or the drill bit etc. must be removed by cutting from the ground side to the position of the drill bit. It was time consuming and extremely inefficient.
そこで本発明は、破砕方式による削進手段としての削進ビットの回転手段とエアーハンマーの打撃手段を備える一方、切削方式による削進手段としてのクラウンビットを取付けた鋼管の回転手段を備え、両者を目的に応じて自在に使い分け出来るように備えた削進装置を提供するものであり、即ち、該削進装置に使用する削進ビットとして、破砕方式による削進手段時には削進ビットの削進ビット本体の頂面部と1対の拡縮ビット半体の正面ビット部を揃えて鋼管の径より大に削進し、必要に応じ1対の拡縮ビット半体をスライド移動し1対の拡縮ビット半体の正面ビット部のみを揃えて鋼管の径より小に調整して、削進ビットを鋼管内に引戻し(そのまま発進坑へ引戻して交換修理等も可)、鋼管のクラウンビットによる切削方式による削進手段に簡単に切換え得るように備えた本発明削進ビットを提供して、前記のように従来手段では困難なあらゆる地盤の削進を可能にして課題を解決したものである。Therefore, the present invention comprises a turning means for rotating a cutting bit as a cutting means by a crushing method and a striking means for an air hammer, and a rotating means for a steel pipe to which a crown bit is attached as a cutting means by a cutting method. Are provided so that they can be used properly according to the purpose. That is, as the cutting bit used in the cutting device, the cutting bit is cut when the cutting means by the crushing method is used. The top face of the bit body and the front bit part of the pair of expansion / contraction bit halves are aligned and cut larger than the diameter of the steel pipe, and if necessary, the pair of expansion / contraction bit halves are slid and moved to a pair of expansion / contraction bit halves Only the front bit part of the body is aligned and adjusted to be smaller than the diameter of the steel pipe, and the cutting bit is pulled back into the steel pipe (it can be returned to the starting pit and replaced or repaired, etc.). Providing present invention KezuSusumu bits having as can easily switched to the means, in the above manner conventional means is obtained by solving the problem by enabling difficult KezuSusumu any ground.
即ち、本発明は、鋼管内の中心軸線上に備えた排土オーガ、エアーハンマー、エアーハンマーの先端に備えた削進ビットを回転手段で正逆回転自在に回転駆動し、先端を前記削進ビットの後端に回転自在に連結した先頭の鋼管とそれに接続した鋼管を他の回転手段で正逆回転自在に回転駆動するように備え、前記先頭の鋼管の先端に削進用のクラウンビットを備えたものである地盤の削進装置において、That is, the present invention provides a earthing auger, an air hammer, and a cutting bit provided at the tip of an air hammer that are rotated on a central axis in a steel pipe so that the cutting bit can be rotated forward and backward by a rotating means. A leading steel pipe that is rotatably connected to the rear end of the bit and a steel pipe connected thereto are rotatably driven by other rotating means so that the forward and reverse rotation is possible. A crown bit for cutting is provided at the tip of the leading steel pipe. In the ground cutting device that is equipped,
前記削進ビットを、エアーハンマーの先端に備えた円柱状の削進ビット本体の先端中心部に設定幅の頂面部を残し左右対称で設定角度の傾斜面を形成し、該傾斜面の基部から円周方向に水平に基部面を形成したビットガイド部を備えると共に、From the base of the inclined surface, the cutting bit is formed symmetrically at the center of the tip of the cylindrical cutting bit body provided at the tip of the air hammer, leaving a top surface portion of a set width and being symmetrical with a set angle. A bit guide portion having a base surface formed horizontally in the circumferential direction is provided.
前記削進ビット本体の平面径と同径若しくは小径な円の半円形状の正面ビット部と、前記基部面と略同形同大の底面部と、前記ビットガイド部と同高の本体部からなり、該本体部における正面ビット部と底面部の直線側の間に前記傾斜面と同傾斜角度のスライド面を形成すると共に、正面ビット部と底面部の円弧形側の間に漏斗状の円弧面からなる縮小ガイド面を形成した1対の拡縮ビット半体を備え、From a semicircular front bit portion of a circle having the same diameter or a small diameter as the plane diameter of the cutting bit body, a bottom surface portion having substantially the same shape and the same size as the base surface, and a body portion having the same height as the bit guide portion Forming a slide surface having the same inclination angle as the inclined surface between the front bit portion and the bottom surface portion of the main body portion, and having a funnel-like shape between the front bit portion and the arcuate side of the bottom surface portion. A pair of expansion / contraction bit halves having a reduced guide surface formed of an arcuate surface;
前記各スライド面に備えたガイド溝若しくはガイドレールと、前記ビットガイド部の各傾斜面に備えたガイドレール若しくはガイド溝を係合して、各拡縮ビット半体を上下摺動自在に備えて構成したものであり、The guide groove or guide rail provided on each slide surface and the guide rail or guide groove provided on each inclined surface of the bit guide portion are engaged, and each expansion / contraction bit half body is configured to be slidable vertically. And
前記削進ビットの削進ビット本体の各基部面に各拡縮ビット半体の底面部を当接し、削進ビット本体の各傾斜面に各拡縮ビット半体のスライド面を当接して、削進ビット本体の頂面部と各拡縮ビット半体の正面ビット部を揃えた状態、即ち、頂面部と各正面ビット部で形成される円の径を鋼管の外径より大の状態として、削進ビットの駆動で鋼管の外径より大径の孔を削進するように備え、The base of the cutting bit body of the cutting bit is in contact with the bottom surface of each expansion / contraction bit half body, and the sliding surface of each expansion / contraction bit half body is in contact with each inclined surface of the cutting bit body. A state in which the top surface portion of the bit body and the front bit portion of each expansion / contraction bit half are aligned, that is, the diameter of the circle formed by the top surface portion and each front bit portion is larger than the outer diameter of the steel pipe. To drive a hole with a diameter larger than the outer diameter of the steel pipe by driving
また、前記の各拡縮ビット半体を削進ビット本体の各傾斜面に沿い頂面部の方向へ摺動し、各正面ビット部の直線側を当接して形成される円の径を鋼管の内径より小に縮小した状態として、削進ビットの鋼管内・発進坑内への引戻し、若しくは、削進ビットを鋼管内へ引戻した状態でのクラウンビットによる削進を自在に行えるように備えたことを特徴とする、地盤の削進装置の削進ビットによって課題を解決したものである。Also, the diameter of the circle formed by sliding each of the expansion / contraction bit halves along the inclined surface of the cutting bit body in the direction of the top surface portion and contacting the straight side of each front bit portion is set to the inner diameter of the steel pipe. As a reduced state, the cutting bit can be pulled back into the steel pipe / starting pit, or the cutting bit can be pulled back into the steel pipe so that the cutting with the crown bit can be performed freely. The feature is solved by the cutting bit of the ground cutting device.
下水、ガス、上水道、電纜管を、玉石、岩盤層等を削進する場合エアーハンマーの衝撃により削進ビットで玉石、岩盤層等を破砕しながら推進するが、土質の変化、埋設物の種類等により、衝撃による破砕が不可能となる場合がある。
従来はそのような場合に削進途中の管を引抜くか、又は、地表側から掘り返して取出していたが、本発明は、破砕方式による削進手段時には削進ビットの削進ビット本体の頂面部と1対の拡縮ビット半体の各正面ビット部を揃えて鋼管の径より大に削進し、また、1対の拡縮ビット半体をスライド前進し1対の拡縮ビット半体の各正面ビット部のみを揃えて鋼管の径より小に調整して、削進ビットを鋼管内に引戻し(そのまま発進坑へ引戻して交換修理等も可)、鋼管のクラウンビットによる切削方式による削進手段に簡単に切換え得るように備えものであるので、前記の両削進手段を適宜使い分けることによって、前記のような種々の地盤、対象物等、若しくは土質の変化、埋設物の種類等に適応して、自在かつ極めて効率的に削進できる優れた効果がある。When cutting sewage, gas, waterworks, electric pipes, cobblestones, bedrock layers, etc., while crushing cobblestones, bedrock layers, etc. with a cutting bit by the impact of an air hammer, the soil changes, types of buried objects For example, crushing due to impact may not be possible.
Conventionally, in such a case, the pipe in the middle of cutting was pulled out or dug out from the ground surface side, but the present invention is the top of the cutting bit main body of the cutting bit when cutting by the crushing method. Align the face and each front bit part of the pair of expansion / contraction bit halves to cut larger than the diameter of the steel pipe, slide forward the pair of expansion / contraction bit halves, and each front of the pair of expansion / contraction bit halves Only the bit part is aligned and adjusted to be smaller than the diameter of the steel pipe, and the cutting bit is pulled back into the steel pipe (it can be pulled back to the starting pit and replaced or repaired). Since it is provided so that it can be easily switched, it can be adapted to various grounds, objects, etc. as described above, soil changes, types of buried objects, etc. by appropriately using both the above-mentioned cutting means. , Free and extremely efficient There is an effect.
前記のように、1対の拡縮ビット半体をスライド前進し1対の拡縮ビット半体の各正面ビット部のみを揃えて鋼管の径より小に調整して、削進ビットを鋼管内を通し、そのまま発進坑へ引戻すことができるので、必要に応じ、削進ビットを発進坑へ引戻して、削進ビット、エアーハンマー等の交換や修理等を容易に行うことができる。As described above, the pair of expansion / contraction bit halves are slid forward, only the front bit portions of the pair of expansion / contraction bit halves are aligned and adjusted to be smaller than the diameter of the steel pipe, and the cutting bit is passed through the steel pipe. Since it can be pulled back to the starting pit as it is, the cutting bit can be pulled back to the starting pit as necessary, and the cutting bit, the air hammer, etc. can be easily replaced or repaired.
削進ビット、エアーハンマー等を鋼管内を通して発進坑へ引戻して鋼管内を空の状態にし得るので、その削進の鋼管の中空を利用して、既設管への枝管の取付け、削進方向の測定・修正等を容易に行うことができる。The cutting bit, air hammer, etc. can be pulled back to the starting pit through the steel pipe and the steel pipe can be emptied, so the hollow of the cutting steel pipe can be used to attach the branch pipe to the existing pipe, and the cutting direction Can be easily measured and corrected.
地盤の削進装置において、その削進ビット1を、頂面部4、傾斜面5、基部面6を形成したビットガイド部7を設けた削進ビット本体3を備えると共に、正面ビット部8、底面部9、縮小ガイド面12を設けた1対の拡縮ビット半体13を別設し、前記の各拡縮ビット半体13を削進ビット本体3の各ビットガイド部7の傾斜面5に沿い上方摺動自在に備えて構成した、地盤の削進装置の削進ビット。In the ground cutting device, the
図6は、本発明削進ビットを使用する地盤の削進装置の1例の構成概略を示す図である。FIG. 6 is a diagram showing a schematic configuration of one example of a ground cutting device using the cutting bit of the present invention.
本発明削進ビットを使用する地盤の削進装置の1例は、鋼管15、16内の中心軸線上に備えた排土オーガ14、エアーハンマー2、エアーハンマー2の先端に備えた削進ビット1を回転手段で正逆回転自在に回転駆動し、先端を前記削進ビット1の後端に回転自在に連結した先頭の鋼管15とそれに接続した鋼管16を他の回転手段で正逆回転自在に回転駆動するように備え、前記先頭の鋼管15の先端に削進用のクラウンビット17を備えたものである。An example of a ground cutting device using the cutting bit of the present invention is a
なお、図6において、Aは回転手段、Bは回転手段、Cは中心軸線、20は発進坑、21は取付板、22は地盤、23はモーター、24はギヤ、25は排出孔、26は推進架台、27はベース、28は推進手段、29はトランシット、30はターゲットである。In FIG. 6, A is a rotating means, B is a rotating means, C is a central axis, 20 is a start shaft, 21 is a mounting plate, 22 is a ground, 23 is a motor, 24 is a gear, 25 is a discharge hole, and 26 is a discharge hole. A propulsion base, 27 is a base, 28 is a propulsion means, 29 is a transit, and 30 is a target.
図1は、地盤の削進装置の1例に備えた本発明実施例削進ビット及び先頭の鋼管部分の一部切断正面図、
図2は、図1の平面図、
図3は、削進ビットを鋼管の方向に引戻すことにより、鋼管のクラウンビットの内周縁と各拡縮ビット半体の縮小ガイド面の摺動案内で、各拡縮ビット半体を各傾斜面に沿い頂面部の方向へ摺動して、各拡縮ビット半体の正面ビット部で形成される円の径を鋼管の内径より小に縮小する過程の説明図、
図4は、図3の動作を完了して、拡縮ビット半体の各拡縮ビット半体の正面ビット部で形成される円の径を鋼管の内径より小に縮小し、削進ビットを鋼管内に引戻す状態の説明図、
図5は、拡縮ビット半体(植付ビットの図示を省く。)の正面図、平面図、底面図、右側面図、左側面図である。FIG. 1 is a partially cut front view of a cutting bit according to an embodiment of the present invention prepared for an example of a ground cutting device and a steel pipe portion at the top,
2 is a plan view of FIG.
FIG. 3 shows that by moving the cutting bit back in the direction of the steel pipe, the sliding bit guides of the inner and outer edges of the crown bit of the steel pipe and the reduction guide surface of each expansion / contraction bit half, each expansion / contraction bit half on each inclined surface. An explanatory view of the process of sliding in the direction of the top surface portion along the circle and reducing the diameter of the circle formed by the front bit portion of each expansion / contraction bit half to be smaller than the inner diameter of the steel pipe,
4 completes the operation of FIG. 3 and reduces the diameter of the circle formed by the front bit portion of each expansion / contraction bit half to be smaller than the internal diameter of the steel pipe, Explanatory drawing of the state pulled back to
FIG. 5 is a front view, a plan view, a bottom view, a right side view, and a left side view of an expansion / contraction bit half (the illustration of the planting bit is omitted).
削進ビット1を、エアーハンマー2の先端に備えた円柱状の削進ビット本体3の先端中心部に設定幅の頂面部4を残し左右対称で設定角度の傾斜面5を形成し、該傾斜面5の基部から円周方向に水平に基部面6を形成したビットガイド部7を備えると共に、(図1)The cutting
前記削進ビット本体3の平面径と同径若しくは小径な円の半円形状の正面ビット部8と、前記基部面6と略同形同大の底面部9と、前記ビットガイド部7と同高の本体部10からなり、該本体部10における正面ビット部8と底面部9の直線側の間に前記傾斜面5と同傾斜角度のスライド面11を形成すると共に、正面ビット部8と底面部9の円弧形側の間に漏斗状の円弧面からなる縮小ガイド面12を形成した拡縮ビット半体13を別設し、(図1、図5)A semicircular
前記ビットガイド部7の各傾斜面5に備えたガイドレール18と各拡縮ビット半体13のスライド面11に備えたガイド溝19を係合して、各拡縮ビット半体13を上下摺動自在に備えて構成したものである。(図1、図5)
なお、ガイドレール18を拡縮ビット半体13の各スライド面11に備え、ガイド溝19をビットガイド部7の各傾斜面5に備えても可である。The guide rails 18 provided on the inclined surfaces 5 of the bit guide portion 7 and the
The guide rail 18 may be provided on each
前記削進ビット1の削進ビット本体3の各基部面6に各拡縮ビット半体13の底面部9を当接し、削進ビット本体3の各傾斜面5に各拡縮ビット半体13のスライド面11を当接して、削進ビット本体3の頂面部4と各拡縮ビット半体13の正面ビット部8を揃えた状態、即ち、頂面部4と各正面ビット部8で形成される円の径を鋼管15、16の外径より大の状態として、削進ビット1の駆動で鋼管15、16の外径より大径の孔を削進するように備え、(図1)The
また、前記の各拡縮ビット半体13を削進ビット本体3の各傾斜面5に沿い頂面部4の方向へ摺動し、各正面ビット部8の直線側を当接して形成される円の径を鋼管15、16の内径より小に縮小した状態として、削進ビット1の鋼管15、16内若しくは発進坑20内への引戻し、または、削進ビット1を鋼管15、16内へ引戻した状態でのクラウンビット17による削進を自在に行えるようにした、地盤の削進装置の削進ビットである。(図1、図3)Further, each of the expansion / contraction bit halves 13 is slid along the inclined surface 5 of the cutting
上記の各正面ビット部8の直線側を当接して形成される円の径を鋼管15、16の内径より小径に縮小して削進ビット1を鋼管15、16内に引戻す手段を、より詳細に説明すると、推進手段7で削進ビット1、エアーハンマー2、排土オーガー14等を発進坑20の方向へ引戻移動すると、削進ビット本体3上の各拡縮ビット半体13の各縮小ガイド面12が鋼管15のクラウンビット17上端の内周縁に衝突し、該内周縁に対し各縮小ガイド面12が接触摺動すると同時に各拡縮ビット半体13がその各スライド面11に備えたガイド溝19と削進ビット本体3の各傾斜面5に備えたガイドレール18の摺動案内で各傾斜面5を頂面部4の方向へ移動し、次いで、各拡縮ビット半体13の各正面ビット部8の直線側が当接して鋼管15、16の内径より小径の円が形成され、次いで、削進ビットが鋼管15、16の内へ引戻されるものである。(図1〜図2〜図3)Means for reducing the diameter of the circle formed by contacting the straight side of each of the
「破砕方式による削進手段」(図1参照)
回転手段Bを運転して排土オーガ14、エアーハンマー2、削進ビット1(頂面部4と各正面ビット部8で形成する円の径が鋼管15、16の外径より大の状態)を回転すると同時に、回転手段Aを運転して取付板21、鋼管15、16を逆回転して、上記削進ビット1の回転で削進すると同時にエアーハンマー2による削進ビット1の衝撃力によって地盤22を粉砕して削進し(23はモーター、24はギヤ)、"Crushing means by crushing method" (see Fig. 1)
The rotating means B is operated to remove the
掘削によって生じた排土を削進ビット1の排土孔から鋼管15、16内に導入し排土オーガ14で後方移送して後端の鋼管15、16の後方の排出孔25から外部へ排出し、同時に鋼管15、16の逆回転で排土オーガ14の排土移送作用を助勢し、The excavation generated by excavation is introduced into the
また、削進ビット1の前進と共に、その前向き衝撃力を削進ビット1のフランジからクラウンビット17に受けて先頭の鋼管15を前方牽引してそれに接続した鋼管16と取付板21を共に前進する。Further, along with the advancement of the cutting
「切削方式による削進手段」(図3参照)
また、地盤の条件によって、削進ビット1(各正面ビット部8が形成する円の径を鋼管15、16の内径より小に縮小した状態)を先頭の鋼管15内に引戻したのち、クラウンビット17の回転で削進を行う。"Cutting means by cutting method" (see Fig. 3)
Depending on the ground conditions, the cutting bit 1 (the state in which the diameter of the circle formed by each
そして、上記の削進ビット1の削進、鋼管15、16の前進に同調し乍ら更に推進架台26上のベース27を油圧シリンダー等の推進手段28で加圧推進して、岩盤、玉石等の悪条件地盤22を削進して鋼管15、16を埋設する。In synchronism with the cutting of the cutting
前記「破砕方式による削進手段」と「切削方式による削進手段」を使い分けることによって、岩盤、玉石、礫等の地盤、水面下の地盤等のあらゆる悪条件地盤の削進を行い得る。
また、地盤の削進装置は実施例装置に限らず、同等の機能を有し本発明削進ビットを使用可能な装置に汎用し得る。By properly using the “crushing means by the crushing method” and the “cutting means by the cutting method”, it is possible to carry out any unfavorable ground such as bedrock, cobblestone, gravel and the like, and ground below the surface of the water.
The ground cutting device is not limited to the embodiment device, and can be widely used for a device having an equivalent function and capable of using the cutting bit of the present invention.
A 回転手段
B 回転手段
C 中心軸線、
1 削進ビット
2 エアーハンマー
3 削進ビット本体
4 頂面部
5 傾斜面
6 基部面
7 ビットガイド部
8 正面ビット部
9 底面部
10 本体部
11 スライド面
12 縮小ガイド面
13 拡縮ビット半体
14 排土オーガ
15 鋼管(先頭)
16 鋼管
17 クラウンビット
18 ガイドレール
19 ガイド溝
20 発進坑
21 取付板
22 地盤
23 モーター
24 ギヤ
25 排出孔
26 推進架台
27 ベース
28 推進手段
29 トランシット
30 ターゲットA rotating means B rotating means C central axis,
DESCRIPTION OF
16
Claims (2)
前記削進ビットを、頂面部、傾斜面、基部面を形成したビットガイド部を設けた削進ビット本体を備えると共に、正面ビット部、底面部、縮小ガイド面を設けた1対の拡縮ビット半体を別設し、前記1対の拡縮ビット半体を削進ビット本体の各ビットガイド部の傾斜面に沿い頂面部の方向へ摺動自在に備えて構成したことを特徴とする、
地盤の削進装置の削進ビット。The earth removal auger, air hammer, and cutting bit provided at the tip of the air hammer are driven to rotate forward and backward by rotating means, and the tip rotates to the rear end of the cutting bit. A ground pipe comprising a freely connected leading steel pipe and a steel pipe connected to the steel pipe so as to be rotated in a forward / reverse direction by other rotating means, and a crown bit for cutting is provided at the tip of the leading steel pipe In the cutting device of
The cutting bit is provided with a cutting bit body provided with a bit guide portion having a top surface portion, an inclined surface, and a base surface, and a pair of expansion / contraction bits half provided with a front bit portion, a bottom surface portion, and a reduction guide surface. The body is separately provided, and the pair of expansion / contraction bit halves are configured to be slidable in the direction of the top surface along the inclined surface of each bit guide portion of the cutting bit body,
Cutting bit of ground cutting device.
前記削進ビットを、エアーハンマーの先端に備えた円柱状の削進ビット本体の先端中心部に設定幅の頂面部を残し左右対称で設定角度の傾斜面を形成し、該傾斜面の基部から円周方向に水平に基部面を形成したビットガイド部を備えると共に、前記削進ビット本体の平面径と同径若しくは小径な円の半円形状の正面ビット部と、前記基部面と略同形同大の底面部と、前記ビットガイド部と同高の本体部からなり、該本体部における正面ビット部と底面部の直線側の間に前記傾斜面と同傾斜角度のスライド面を形成すると共に、正面ビット部と底面部の円弧形側の間に漏斗状の円弧面からなる縮小ガイド面を形成した1対の拡縮ビット半体を別設し、
前記各スライド面に備えたガイド溝若しくはガイドレールと、前記ビットガイド部の各傾斜面に備えたガイドレール若しくはガイド溝を係合して、各拡縮ビット半体を上下摺動自在に備えて構成したものであり、
前記削進ビットの削進ビット本体の各基部面に各拡縮ビット半体の底面部を当接し、削進ビット本体の各傾斜面に各拡縮ビット半体のスライド面を当接して、削進ビット本体の頂面部と各拡縮ビット半体の正面ビット部を揃えた状態、即ち、頂面部と各正面ビット部で形成される円の径を鋼管の外径より大の状態として、削進ビットの回転駆動で鋼管の外径より大径の孔を削進するように備え、また、前記の各拡縮ビット半体を削進ビット本体の各傾斜面に沿い頂面部の方向へ摺動し、各正面ビット部の直線側を当接して形成される円の径を鋼管の内径より小に縮小した状態として、削進ビットの鋼管内・発進坑内への引戻し、若しくは、削進ビットを鋼管内へ引戻した状態でのクラウンビットによる削進を自在に行えるように備えたことを特徴とする、
請求項1の地盤の削進装置の削進ビット。The earth removal auger, air hammer, and cutting bit provided at the tip of the air hammer are driven to rotate forward and backward by rotating means, and the tip rotates to the rear end of the cutting bit. A ground pipe comprising a freely connected leading steel pipe and a steel pipe connected to the steel pipe so as to be rotated in a forward / reverse direction by other rotating means, and a crown bit for cutting is provided at the tip of the leading steel pipe In the cutting device of
From the base of the inclined surface, the cutting bit is formed symmetrically at the center of the tip of the cylindrical cutting bit body provided at the tip of the air hammer, leaving a top surface portion of a set width and being symmetrical with a set angle. A bit guide portion having a base surface formed horizontally in the circumferential direction, and a semi-circular front bit portion having a diameter the same as or smaller than the plane diameter of the cutting bit body, and substantially the same shape as the base surface A bottom surface portion of the same size and a main body portion having the same height as the bit guide portion, and a slide surface having the same inclination angle as the inclined surface is formed between the front bit portion and the bottom surface portion of the main body portion. A pair of expansion / contraction bit halves formed with a reduction guide surface composed of a funnel-shaped arc surface between the front bit part and the arcuate side of the bottom part,
The guide groove or guide rail provided on each slide surface and the guide rail or guide groove provided on each inclined surface of the bit guide portion are engaged, and each expansion / contraction bit half body is configured to be slidable vertically. And
The base of the cutting bit body of the cutting bit is in contact with the bottom surface of each expansion / contraction bit half body, and the sliding surface of each expansion / contraction bit half body is in contact with each inclined surface of the cutting bit body. A state in which the top surface portion of the bit body and the front bit portion of each expansion / contraction bit half are aligned, that is, the diameter of the circle formed by the top surface portion and each front bit portion is larger than the outer diameter of the steel pipe. It is provided to cut a hole having a diameter larger than the outer diameter of the steel pipe by the rotational drive of, and slide each expansion / contraction bit half body in the direction of the top surface along each inclined surface of the cutting bit body, With the diameter of the circle formed by abutting the straight side of each front bit part reduced to be smaller than the inner diameter of the steel pipe, the cutting bit is pulled back into the steel pipe / starting pit, or the cutting bit is put into the steel pipe. It was prepared to be able to perform cutting with a crown bit in the state pulled back to The butterfly,
A cutting bit of the ground cutting device according to claim 1.
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