JPS60195295A - Rotary propelling apparatus - Google Patents
Rotary propelling apparatusInfo
- Publication number
- JPS60195295A JPS60195295A JP4854384A JP4854384A JPS60195295A JP S60195295 A JPS60195295 A JP S60195295A JP 4854384 A JP4854384 A JP 4854384A JP 4854384 A JP4854384 A JP 4854384A JP S60195295 A JPS60195295 A JP S60195295A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- cutting
- hole
- pipe
- propulsion
- 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
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
(イ)発明の技術分野
本発明は、道路下、軌道下等の地中に管路を布設すると
きに採用される推進装置に関し、特に削進管にこれを回
転させつつ推力を与えて、前進管を地盤中に推進布設す
る推進装置の改良に関するものである。Detailed Description of the Invention (a) Technical Field of the Invention The present invention relates to a propulsion device employed when laying pipelines underground, such as under roads or tracks, and in particular to a propulsion device that rotates the This invention relates to an improvement of a propulsion device that propels and installs an advance pipe into the ground by applying thrust while moving the progress pipe.
((1)従来技術と問題点
従来、交通量、埋設物の多い場所、軌道下等の地盤中を
横断する状態に管路を布設する工法としては、回転スピ
ンドル及び推力シリンダを有する推進機により削進管を
回転させつつ推力を付与し、これにより削進管を地盤中
に推進させる回転式の推進方法がある。((1) Prior Art and Problems Conventionally, the method of laying pipes across the ground in places with a lot of traffic and buried objects, under tracks, etc. is by propulsion machines with rotating spindles and thrust cylinders. There is a rotary propulsion method in which thrust is applied to the excavation tube while rotating it, thereby propelling the excavation tube into the ground.
このような推進工法は、前進管が布設されるところの地
盤の土質が比較的均一で、かつ削進管の外周面に作用す
る土圧及び摩擦抵抗がほぼ均一の場合は問題がないが、
削進管を推進させる地盤の土質に硬い部分及び軟弱部分
が混在し、削進管の外周面に作用する土庄及び摩擦抵抗
が前進管の円周方向で差が生じてくると、削進管の推進
方向が目的とする推進方向からずれてしまい、削進管が
埋設物と接触したり、埋設物を破損させるおそれがある
。There is no problem with this propulsion method if the soil quality of the ground where the advance pipe is installed is relatively uniform and the earth pressure and frictional resistance acting on the outer circumferential surface of the advance pipe are almost uniform.
If the soil quality of the ground on which the excavation tube is propelled has a mixture of hard and soft areas, and the soil pressure and frictional resistance acting on the outer circumferential surface of the excavation tube differ in the circumferential direction of the advancement tube, the excavation tube The direction of propulsion may deviate from the intended direction of propulsion, and there is a risk that the excavation pipe may come into contact with the buried object or damage the buried object.
そこで、削進管の先端に方向修正機構を設けておくこと
も考えられるが、しかし、削進管の推進に伴い削進管内
にその先端開口から進入する土を排出しなければならな
いこと、及び削進管が回転すること、さらには修正機構
を作動させるための駆動手段等が必要となることから修
正機構及びその付帯設備等が複雑となり、かつ修正機構
・を常時削進管に設置しておくことは、削進管の推進作
業及び排土作業を困lftにし、実用性に乏しい欠点が
あった。Therefore, it is conceivable to provide a direction correction mechanism at the tip of the excavation pipe, but this method requires the removal of soil that enters the excavation pipe from the opening at its tip as the excavation pipe is propelled. Since the cutting tube rotates and a driving means is required to operate the correction mechanism, the correction mechanism and its auxiliary equipment are complicated, and the correction mechanism must be constantly installed in the cutting tube. This had the drawback of making it difficult to drive the excavation pipe and remove the earth, making it impractical.
(ハ)発明の目的
本発明は上記のような従来の欠点を解決したもので、そ
の目的とするところは、前進管が推進されることで既に
形成された貫入穴内壁を、削進管を所望角度範囲で正逆
方向に揺動回転させながら前後進させて切削拡孔するこ
とにより、削進管の推進方向を正しい方向に容易にかつ
自動的に修正でき、実用性に適した回転式推進装置を提
供するにある。(c) Purpose of the Invention The present invention solves the above-mentioned conventional drawbacks, and its purpose is to remove the inner wall of the penetration hole that has already been formed by the advancement of the advancement tube using the cutting tube. This rotary type is suitable for practical use because it can easily and automatically correct the propulsion direction of the cutting tube by moving it forward and backward while swinging and rotating in the forward and reverse directions within the desired angle range to expand the cutting hole. To provide propulsion equipment.
仁)発明の構成
上記目的を実現するために本発明の回転式推進装置は、
地盤中に推進される削進管と、この削進管を回転しつつ
推進し、かつ逆転後退動作が可能な回転推進機と、上記
前進管の先端部周壁に片寄らせて設けられ、かつ上記前
進管をその推進動作時と逆に回転したとき切削可能に突
出する拡孔刃とを備え、上記前進管を上記回転推進機に
より所望角度範囲で正逆回転させながら前後進すること
で前進管貫入穴の内径を上記拡孔刃により切削拡孔する
ようにしたものである。Structure of the Invention In order to achieve the above object, the rotary propulsion device of the present invention has the following features:
an excavation pipe that is propelled into the ground; a rotary propulsion machine that rotates and propels the evacuation pipe and is capable of reverse and backward movement; The forwarding tube is provided with a hole-expanding blade that protrudes so as to be cut when the forwarding tube is rotated in the opposite direction to its propulsion operation, and the forwarding tube is moved forward and backward while being rotated forward and backward in a desired angle range by the rotary propulsion device. The inner diameter of the penetration hole is expanded by cutting with the hole expanding blade.
(ホ)発明の実施例 以下、本発明の実施例を図面について説明する。(E) Examples of the invention Embodiments of the present invention will be described below with reference to the drawings.
第1図は本発明の回転式推進装置を道路下横断等の管路
布設に適用した場合の全体構成図を示すもので、1は道
路、軌道等(以下これを道路等と云う)セあり、この道
路等1を挾んでその両側に押し込み側立坑2及び到達側
立坑3が形成されている。上記押し込み側立坑2内のコ
ンクリート仕上げした作業床面上にはベース4が設置さ
れ、このベース4上に回転推進機5が矢印XI、X2に
示す方向に前後進可能に取り付けられている。Figure 1 shows an overall configuration diagram when the rotary propulsion device of the present invention is applied to laying pipes such as crossing under roads. A push-in shaft 2 and a reaching shaft 3 are formed on both sides of the road 1. A base 4 is installed on the concrete-finished work floor in the push-in shaft 2, and a rotary propulsion device 5 is mounted on the base 4 so as to be movable back and forth in the directions shown by arrows XI and X2.
上記回転推進機5はベース4上に矢印xi、x2方向に
進退可能に取り付けたスピンドルヘッド6を備え、この
スピンドルヘッド6は油圧モータ7により正、逆方向に
回転されるようになっているとともに、推力シリンダ8
により進退可能になっており、そしてこのようにしたス
ピンドルヘッド6には道路等1の下に横断布設される削
進管9が挿通され、この削進管9はスピンドルヘッド6
に設けたチャック10によってチャッキングされるよう
になっている。The rotary propulsion device 5 is equipped with a spindle head 6 mounted on a base 4 so as to be movable in the directions of arrows xi and x2, and this spindle head 6 is rotated in forward and reverse directions by a hydraulic motor 7. , thrust cylinder 8
The spindle head 6 thus constructed is fitted with a cutting pipe 9 installed across the road, etc. 1, and this cutting pipe 9 is inserted into the spindle head 6.
It is configured to be chucked by a chuck 10 provided at.
上記削進管9の先端部は第2図〜第7図に示す如く一部
がオーバラップする二重管構造になっており、この二重
管構造をなす外管11の開口先端縁には切削刃12が設
けられ、さらに外管11が削進管9の内管部9aと嵌合
する部分には、第3図及び第6図に示すように複数個、
例えば4個の四角状穴13が円周方向に90°の位相差
をもって穿設され、上記内管部9aには上記各四角状穴
13に各別に係合する突部14が形成されており、この
四角状穴13と突部14とにより外管11の抜は止めを
行なわせるとともに、外管11と内管部9aとの相対的
回転角度を一定に規制するようになっている。また、上
記外管11及び内管部9aには、第2図、第3図及び第
5図に示す如く円周の一部に片寄らせて、複数個、例え
ば3個ずつの同一形状の穴15.16が互いにαの角度
部して形成されており、そしてこの互いに一致する穴1
5.16に対向して拡孔刃エフをそれぞれ配置し、この
拡孔刃17の基部は内管部9aの内壁に固着したブラケ
ット18に軸19によって削進管9の円周方向に回動可
能に枢着され、その刃先17a側は穴15.16内に挿
入されているとともに、刃先17aに対向して切削排土
口20が外管11及び内管部9aに形成しである。した
がって、推進管9が第5図の矢印A方向に回転されると
き拡孔刃17の刃先17aは削進管9、即ち外管11の
外周面と一致するか、それより内側へ没入し、また、前
進管9が第7図の矢印B方向に回転されたとき、四角状
穴13と突部14で規制される外管11と内管部9aと
の相対的回転により拡孔刃17の刃先17aが外管11
の外周面から外方に突出して削進管90貫入穴内壁を切
削するようになるものである。なお、21は拡孔刃カバ
ーである。As shown in FIGS. 2 to 7, the distal end of the cutting tube 9 has a double-tube structure that partially overlaps. A plurality of cutting blades 12 are provided at the portion where the outer tube 11 fits into the inner tube portion 9a of the cutting tube 9, as shown in FIGS. 3 and 6.
For example, four square holes 13 are bored in the circumferential direction with a phase difference of 90°, and the inner tube portion 9a is formed with a protrusion 14 that engages with each of the square holes 13 separately. The square hole 13 and the protrusion 14 prevent the outer tube 11 from being pulled out, and also regulate the relative rotation angle between the outer tube 11 and the inner tube portion 9a to a constant value. Further, in the outer tube 11 and the inner tube portion 9a, as shown in FIGS. 2, 3, and 5, a plurality of holes, for example, three holes of the same shape, are arranged on a part of the circumference. 15 and 16 are formed at an angle of α to each other, and these matching holes 1
5. Hole expansion blades F are arranged opposite to the hole expansion blades 17, and the base of the hole expansion blades 17 is rotated in the circumferential direction of the drilling tube 9 by a shaft 19 on a bracket 18 fixed to the inner wall of the inner tube portion 9a. The cutting edge 17a side thereof is inserted into the hole 15.16, and a cutting soil discharge port 20 is formed in the outer tube 11 and the inner tube portion 9a opposite to the cutting edge 17a. Therefore, when the propulsion tube 9 is rotated in the direction of arrow A in FIG. Furthermore, when the advancing tube 9 is rotated in the direction of arrow B in FIG. The cutting edge 17a is the outer tube 11
It protrudes outward from the outer circumferential surface of the cutting tube 90 to cut the inner wall of the penetration hole. Note that 21 is a hole expanding blade cover.
次に、上記のように構成された本実施例の管路布設動作
について説明する。Next, a description will be given of the pipe installation operation of this embodiment configured as described above.
前進管9がスピンドルヘッド6に挿通されチャック10
により把持された状態において、スピンドルヘッド6が
油圧モータ7により回転され、かつ准カシリンダ8の前
進動作により第1図の矢印X1方向に推力が付与される
と、スピンドルへラド6の一体の削進管9ば右回転され
ながら矢印X1方向に前進される。そして、削進管9が
右回転することにより、外管11の開口先端縁に設けた
切削刃12が道路等1下の地盤を外管径に応じて円柱状
にくり抜き切削すると同時に、前進管9が前進されるこ
とにより、削進管9全体がその先端側から地盤中に順次
推進されていく。なお、削進管9をそのまま布設管路と
する場合は、前進管9の推進に伴い切り出される土は図
示しない水ジェツトにより前進管9外に排出される。The advance tube 9 is inserted into the spindle head 6 and the chuck 10
When the spindle head 6 is rotated by the hydraulic motor 7 and a thrust is applied in the direction of the arrow X1 in FIG. The tube 9 is rotated clockwise and advanced in the direction of arrow X1. As the cutting tube 9 rotates clockwise, the cutting blade 12 provided at the opening tip edge of the outer tube 11 cuts the ground under the road etc. 1 into a cylindrical shape according to the diameter of the outer tube, and at the same time 9 is advanced, the entire excavation pipe 9 is sequentially propelled into the ground from its tip side. In addition, when the excavation pipe 9 is used as a laid pipe as it is, the soil cut out as the advance pipe 9 is propelled is discharged outside the advance pipe 9 by a water jet (not shown).
一方、前進管9が道路等l下の地盤中に推進されるとき
は、削進管9は右回転しているため(切削刃12の形状
から右回転となる)、拡孔刃17の刃先17aは第5図
に示す如く外管11の外周面と一致するか、外周面より
内方に引っ込んだ状態におかれ、前進管9の推進に伴い
形成される貫入穴22(第9図(a)参照)を切削する
ことがない。On the other hand, when the advancing tube 9 is propelled into the ground under a road or the like, the cutting edge of the hole expanding blade 17 rotates clockwise because the advancing tube 9 rotates clockwise (because of the shape of the cutting blade 12). 17a is aligned with the outer circumferential surface of the outer tube 11 as shown in FIG. (See a)) will not be cut.
即ち、削進管9が地盤中を第5図の矢印入方向(正回転
方向)に回転され始める時点では、削進管9の内管部9
aに嵌合している外管11は土工及び摩擦抵抗によって
停止状態に保持されているため、まず、削進管9のみが
回転し、そして内管部9aの突部14が第6図に示す如
く外管11に形成した四角状穴13の一端縁13aに係
合すると、外管11も削進管9と同一方向に遅れて回転
し始める。このとき、各拡孔刃17の肩部17bが外管
11の穴15の縁部15aにより押され、各拡孔刃17
は第5図の矢印C方向に回動して第5図に示す状態とな
るのである。That is, at the time when the cutting pipe 9 begins to rotate in the ground in the direction indicated by the arrow in FIG. 5 (forward rotation direction), the inner pipe portion 9 of the cutting pipe 9
Since the outer pipe 11 fitted into the section a is held in a stopped state by earthworks and frictional resistance, first, only the cutting pipe 9 rotates, and then the protrusion 14 of the inner pipe part 9a rotates as shown in Fig. 6. As shown, when the outer tube 11 is engaged with one end edge 13a of the square hole 13 formed in the outer tube 11, the outer tube 11 also begins to rotate in the same direction as the cutting tube 9 with a delay. At this time, the shoulder 17b of each hole-expanding blade 17 is pushed by the edge 15a of the hole 15 of the outer tube 11, and each hole-expanding blade 17
is rotated in the direction of arrow C in FIG. 5, resulting in the state shown in FIG.
次に、削進管9の方向修正操作について述べる。Next, the direction correction operation of the cutting tube 9 will be described.
第9図(alに示すように回転推進機5により地盤中に
推進されつつある削進管9の推進方向が正しい推進方向
ラインLに対してθ°上にずれたとする。これが検知さ
れたならば、前進管先端部分の拡孔刃17の位置を向き
を修正したい方向、即ち第9図(b)に示す如く削進管
9の下部側に対向させる。かかる状態で油圧モータ7を
逆転起動してスピンドルヘッド6を逆回転させ、削進管
9を第9図(b)の矢印Bに示す如く左回転させる。こ
れに伴い削進管9の先端部側では、まず内管部9aのみ
が、その突部14が第8図に示す如く四角状穴13の縁
部13bに係合するまで矢印B方向に回転する。これに
より土圧及び摩擦抵抗で停止状態になっている外管11
と内管部9aとの間に矢印B方向に相対的ずれが生じる
ため、内管部9aに支持されている拡孔刃17の刃先1
7aが第7図に、示す如く外管11の穴15の縁15b
で押されて矢印り方向に回動し、刃先17aは外管11
の外周面から外方に突出することになる。この状態で削
進管9がさらに矢印B方向に回転されると、突出した拡
孔刃17は削進管9の推進により既に形成されている貫
入穴22の内壁を切削し、切削された土は排土口20か
ら削進管9内に取り出される。そして、削進管9の推進
方向の修正に必要な角度θ1 ゛ (第9図(C1参照
)左回転されたならば、油圧モータ7を正転起動して前
進管9をθ、°右回転させる。このとき、拡孔刃17は
第5図に示すように外管11の外周面から引っ込んだ状
態となる。Assume that the propulsion direction of the excavation pipe 9, which is being propelled into the ground by the rotary propulsion device 5, deviates upward by θ° with respect to the correct propulsion direction line L, as shown in FIG. 9 (al).If this is detected, For example, position the hole expanding blade 17 at the tip of the advancing tube in the direction in which you want to correct the direction, that is, facing the lower side of the cutting tube 9 as shown in FIG. Then, the spindle head 6 is reversely rotated, and the cutting tube 9 is rotated to the left as shown by arrow B in FIG. However, as shown in FIG. 8, the outer tube 11 rotates in the direction of arrow B until it engages with the edge 13b of the square hole 13 as shown in FIG.
Since a relative displacement occurs in the direction of arrow B between the inner tube portion 9a and the inner tube portion 9a, the cutting edge 1 of the hole expanding blade 17 supported by the inner tube portion 9a
7a is the edge 15b of the hole 15 of the outer tube 11 as shown in FIG.
The cutting edge 17a rotates in the direction of the arrow, and the cutting edge 17a touches the outer tube 11.
It will protrude outward from the outer peripheral surface of. When the drilling pipe 9 is further rotated in the direction of arrow B in this state, the protruding hole expanding blade 17 cuts the inner wall of the penetration hole 22 that has already been formed by the thrust of the drilling pipe 9, and the cut soil is removed. is taken out from the soil discharge port 20 into the excavation pipe 9. Then, the angle θ1 ゛ (see Fig. 9 (see C1) required for correcting the direction of propulsion of the advancing tube 9) is applied to the counterclockwise rotation, the hydraulic motor 7 is started to rotate forward, and the advancing tube 9 is rotated clockwise by θ. At this time, the hole expanding blade 17 is retracted from the outer peripheral surface of the outer tube 11, as shown in FIG.
以下同様にして削進管9を角度θ1 °の範囲で左右に
揺動回転させるとともに、推力シリンダ8を後退動作さ
せて削進管9を後退させる。これにより貫入穴22には
第9図(C)に示す如(拡孔刃17の揺動により切削さ
れた拡孔溝23が形成されることになる。そして、削進
管9の後退動作による拡孔溝23の形成位置が前進管9
の推進方向ずれの開始点付近に達したならば、削進管9
を01の角度範囲で左右回転させながら推力シリンダ8
により第9図(a)の推進端位置まで前進させる。この
とき、削進管9は既に形成されている貫入穴22によっ
てほとんど規制されることがないため、前進管9はθ°
ずれた方向に曲げられることがない。したがって、削進
管9が有する剛性により、拡孔刃17は溝23の深さを
さらに深くするよう切削し、この溝に前進管9が入り込
むことによって削進管9の推進方向を正しい推進方向ラ
インLに一致させるのである。第9図(dlがこの状態
を示したもので、前進管9の方向が修正されたことを表
わしている。Thereafter, in the same manner, the cutting tube 9 is oscillated left and right within the range of θ1°, and the thrust cylinder 8 is moved backward to move the cutting tube 9 backward. As a result, a hole expansion groove 23 (cut by the swinging of the hole expansion blade 17) is formed in the penetration hole 22 as shown in FIG. 9(C). The formation position of the hole expansion groove 23 is the forward tube 9
When it reaches near the starting point of deviation in the propulsion direction, the cutting pipe 9
thrust cylinder 8 while rotating left and right in the angle range of 01.
It is advanced to the propulsion end position shown in FIG. 9(a). At this time, since the cutting advancement tube 9 is hardly restricted by the penetration hole 22 that has already been formed, the advancement tube 9 is rotated by θ°.
It cannot be bent in the wrong direction. Therefore, due to the rigidity of the cutting tube 9, the hole expanding blade 17 cuts the groove 23 to make it deeper, and by inserting the advancing tube 9 into this groove, the direction of propulsion of the cutting tube 9 is changed to the correct propulsion direction. It is made to match line L. FIG. 9 (dl shows this state, indicating that the direction of the forward tube 9 has been corrected.
なお、前進管9の方向が上述する前進管9の一往復動作
で修正できない場合は、上述の動作を2回、3回等と繰
り返せば良い。Note that if the direction of the forward tube 9 cannot be corrected by one reciprocating movement of the forward tube 9 described above, the above-described operation may be repeated twice, three times, etc.
以上のように本実施例においては、推進動作時と逆の左
回転したときのみ外管11の外周に突出する拡孔刃17
により修正したい方向の貫入穴22の内壁を所望角度範
囲で所望長さ切削する方式としたので、削進管の方向修
正が容易となり、しかも、方向修正操作は前進管9を左
回転及び前後進させるだけで良いため、従来のように修
正機構の駆動及び操作手段を必要とせず、機構も簡単と
なるほか、前進管9の推進作業、排土作業にも支障を来
すことがなく実用性の高い回転式推進装置とし得る。As described above, in this embodiment, the hole-expanding blade 17 protrudes from the outer periphery of the outer tube 11 only when it rotates to the left, which is the opposite of the propulsion operation.
Since the inner wall of the penetration hole 22 in the direction to be corrected is cut to a desired length within a desired angle range, it is easy to correct the direction of the cutting tube. Since it is only necessary to move the correction mechanism, there is no need for driving and operating means for the correction mechanism as in the past, and the mechanism is simple, and there is no problem with the advancement work of the advance pipe 9 and the soil removal work, making it highly practical. It can be a high rotary propulsion device.
なお、削進管9をその推進操作時と逆に回転したとき、
切削可能に突出される拡孔刃17の機構は上記実施例の
ものに限定されるものではない。Note that when the cutting tube 9 is rotated in the opposite direction to the propulsion operation,
The mechanism of the hole expanding blade 17 which is protruded so as to be able to cut the hole is not limited to that of the above embodiment.
(へ)発明の詳細
な説明した通り本発明の回転式推進装置によれば、削進
管の先端部周壁に、前進管をその推進動作時と逆に回転
したとき切削可能に突出する拡孔刃を設け、そして削進
管を所望角度範囲で正逆回転させながら前後進させて削
進管貫入穴の内壁を拡孔刃により部分的に切削拡孔する
ようにしたものであるから、前進管の推進方向を専用の
駆動手段等を用いることなく容易にかつ自動的に修正す
ることができ、しかも方向修正に従来のような専用の駆
動手段等を必要としないため、装置が簡便となり、実用
性の高いものとすることができる。(F) As described in detail, according to the rotary propulsion device of the present invention, the peripheral wall of the distal end of the cutting advance tube has a hole that protrudes so as to be cuttable when the advance tube is rotated in the opposite direction to the propulsion operation. A cutting blade is provided, and the cutting tube is moved back and forth while rotating forward and backward within a desired angle range, and the inner wall of the cutting tube penetration hole is partially cut and expanded by the hole expanding blade, so that the cutting tube can be moved forward and backward. The direction of propulsion of the pipe can be easily and automatically corrected without using a dedicated drive means, etc., and since the direction correction does not require a dedicated drive means, etc. as in the past, the device is simple. It can be highly practical.
第1図は本発明の回転式推進装置を道路下等の管路布設
に適用した場合の全体構成図、第2図は本発明における
前進管を先端から見たときの端面図、第3図は第2図の
側面図、第4図は第2図のIV −IV線に沿う断面図
、第5図は第3図のV−V線に沿う断面図、第6図は同
じく第3図のVl−Vl線に沿う断面図、第7図及び第
8図はそれぞれ第5図、第6図に対応する拡孔刃突出時
の断面図、第9図(al〜(d)は本発明における削進
管の方向修(正動作を説明するための説明図である。
5・・・回転推進PS 、6・・・スピンドルヘッド、
7・・・油圧モータ、8・・・推進シリンダ、9・・・
削進管、9a・・・内管部、1o・・・チャック、11
・・・外管、12・・・切削刃、13・・・四角状穴、
14・・・突部、15,16・・・穴、17・・・拡孔
刃、18・・・ブラケット、19・・・軸、22・・・
貫入穴、23・・・溝。Fig. 1 is an overall configuration diagram when the rotary propulsion device of the present invention is applied to laying pipes under roads, etc. Fig. 2 is an end view of the forward pipe of the present invention when viewed from the tip, Fig. 3 is a side view of FIG. 2, FIG. 4 is a sectional view taken along line IV--IV of FIG. 2, FIG. 5 is a sectional view taken along line V-V of FIG. 3, and FIG. 6 is a sectional view of FIG. FIG. 7 and FIG. 8 are cross-sectional views when the hole-expanding blade is protruding, corresponding to FIGS. 5 and 6, respectively, and FIGS. It is an explanatory diagram for explaining the direction correction (correction operation) of the cutting tube in 5...Rotary propulsion PS, 6... Spindle head,
7... Hydraulic motor, 8... Propulsion cylinder, 9...
Cutting tube, 9a...Inner tube part, 1o...Chuck, 11
... Outer tube, 12 ... Cutting blade, 13 ... Square hole,
14... Projection, 15, 16... Hole, 17... Hole expanding blade, 18... Bracket, 19... Shaft, 22...
Penetration hole, 23...groove.
Claims (1)
11進し、かつ逆転後退動作が可能な回転推進機と、上
記前進管の先端部周壁に片寄らせて設けられ、かつ上記
削進管をその推進動作時と逆に回転したとき切削可能に
突出する拡孔刃とを備え、上記前進管を上記回転推進機
により所望角度範囲で正逆回転させながら前後進するこ
とで前進管貫入穴の内径を上記拡孔刃により切削拡孔す
るようにしたことを特徴とする回転式推進装置。an advancement tube that is propelled into the ground; a rotary propulsion device that is capable of advancing the advancement tube while rotating it and performing reverse and backward movement; It is equipped with a hole expanding blade that protrudes to enable cutting when the cutting tube is rotated in the opposite direction to its propulsion operation, and the advancing tube is moved forward and backward while being rotated forward and backward within a desired angle range by the rotary propulsion device. A rotary propulsion device characterized in that the inner diameter of the pipe penetration hole is expanded by cutting with the hole expanding blade.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4854384A JPS60195295A (en) | 1984-03-14 | 1984-03-14 | Rotary propelling apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4854384A JPS60195295A (en) | 1984-03-14 | 1984-03-14 | Rotary propelling apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS60195295A true JPS60195295A (en) | 1985-10-03 |
JPH0216837B2 JPH0216837B2 (en) | 1990-04-18 |
Family
ID=12806279
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4854384A Granted JPS60195295A (en) | 1984-03-14 | 1984-03-14 | Rotary propelling apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60195295A (en) |
-
1984
- 1984-03-14 JP JP4854384A patent/JPS60195295A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH0216837B2 (en) | 1990-04-18 |
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