JPH0732631Y2 - Propulsion tube rotating device - Google Patents
Propulsion tube rotating deviceInfo
- Publication number
- JPH0732631Y2 JPH0732631Y2 JP1990115829U JP11582990U JPH0732631Y2 JP H0732631 Y2 JPH0732631 Y2 JP H0732631Y2 JP 1990115829 U JP1990115829 U JP 1990115829U JP 11582990 U JP11582990 U JP 11582990U JP H0732631 Y2 JPH0732631 Y2 JP H0732631Y2
- Authority
- JP
- Japan
- Prior art keywords
- propulsion
- tube
- pressure ring
- pipe
- tip
- 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
Links
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- Excavating Of Shafts Or Tunnels (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 この考案は、推進管とその内側に組込まれたケーシング
ロッドとを発進立坑から到達立坑に向けて移動させる管
推進装置の推進管回転装置に関するものである。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a propulsion pipe rotating device of a pipe propulsion device for moving a propulsion pipe and a casing rod incorporated therein from a starting shaft to a reaching shaft. It is a thing.
上記管推進装置は、第４図および第５図に示すように、
発進立坑１の底面に設けたスライドベース２上に、推進
機本体３と、その推進機本体３をスライドベース２に沿
って移動させる推進ジャッキ４とを設け、推進機本体３
の前側部には押しリング６を取付け、推進機本体３の後
端部には上記押しリング６の内側に挿通されたスピンド
ルロッド７を挾持するチャック８を回転自在に取付け、
そのチャック８の回転駆動用モータＭを推進機本体３の
上部に設けてある。The pipe propulsion device, as shown in FIG. 4 and FIG.
The propulsion device main body 3 and the propulsion jack 4 for moving the propulsion device main body 3 along the slide base 2 are provided on the slide base 2 provided on the bottom surface of the starting shaft 1, and the propulsion device main body 3 is provided.
A push ring 6 is attached to the front side of the, and a chuck 8 for holding a spindle rod 7 inserted inside the push ring 6 is rotatably attached to the rear end of the propulsion unit main body 3.
A rotation driving motor M for the chuck 8 is provided above the propulsion device main body 3.
上記の構成から成る管推進装置は、スピンドルロッド７
の先端部に切削ビット９を先端に有するケーシングロッ
ド10を接続し、そのケーシングロッド10の外側に挿入し
た推進管11の後端を押しリング６に当接し、チャック８
でスピンドルロッド７を挾持する状態において、モータ
Ｍの駆動によりケーシングロッド10を回転し、切削ビッ
ト９で地山を切削しながら推進ジャッキ４の作動により
推進機本体３をスライドベース２に沿って移動させて推
進管11を地中に圧入させるのである。The pipe propulsion device having the above-described structure is provided with the spindle rod 7
A casing rod 10 having a cutting bit 9 at its tip is connected to the tip of the casing rod 10, and the rear end of the propulsion pipe 11 inserted outside the casing rod 10 is brought into contact with the push ring 6 to make the chuck 8
While holding the spindle rod 7 with, the casing rod 10 is rotated by the driving of the motor M, and the propulsion body 4 is moved along the slide base 2 by the operation of the propulsion jack 4 while cutting the ground with the cutting bit 9. Then, the propulsion pipe 11 is pressed into the ground.
そして、１本の推進管11を地中に圧入すると、スピンド
ルロッド７とケーシングロッド10の接続を解除して推進
機本体３を後退動させ、各管の後端にケーシング10およ
び推進管11を継ぎ足し、かつケーシングロッド10をスピ
ンドルロッド７に接続して圧入作業を継続するのであ
る。Then, when one propulsion pipe 11 is press-fitted into the ground, the spindle rod 7 and the casing rod 10 are disconnected, the propulsion device main body 3 is moved backward, and the casing 10 and the propulsion pipe 11 are attached to the rear ends of the respective pipes. Further, the casing rod 10 is connected to the spindle rod 7, and the press-fitting work is continued.
ここで、推進管11は圧入による移動であるため、移動方
向が変わることが多く、その移動方向が変わるたびに方
向修正して方向性を保つ必要がある。Here, since the propulsion pipe 11 is moved by press fitting, the moving direction often changes, and it is necessary to correct the direction each time the moving direction changes to maintain the directionality.
上記方向性を保つため、推進管11の先端に接合され、外
径面の軸心が内径面の軸心に対して偏心する偏心先導管
12を推進管11と共に内径面軸心を中心に回転し、その偏
心先導管12の外径面の軸心と内径面の軸心の位置の差だ
け切削ビット９により地山をオーバーカットし、そのオ
ーバーカットされたがわに推進管11が自然に移動する性
質を利用して方向修正を行なうようにしている。したが
って、方向性を保つためは、推進管11を随時回転させな
ければならない。In order to maintain the above-mentioned directionality, an eccentric tip conduit joined to the tip of the propulsion pipe 11 so that the axis of the outer diameter surface is eccentric with respect to the axis of the inner diameter surface.
12 is rotated together with the propulsion pipe 11 around the inner diameter surface axis, and the ground is overcut by the cutting bit 9 by the difference between the position of the outer diameter surface and the inner diameter surface of the eccentric tip conduit 12. The overcut gutter propulsion tube 11 is naturally moved to correct the direction. Therefore, in order to maintain the directionality, the propulsion pipe 11 must be rotated at any time.
なお、13は、偏心先導管12とケーシングロッド10とを相
対的に回転自在に支持するローラベアリングを示す。Reference numeral 13 denotes a roller bearing that rotatably supports the eccentric tip conduit 12 and the casing rod 10.
ところで、従来の管推進装置においては、推進管11に回
転を与える推進管回転装置をスライドベース２の先端部
上側に設けた構成であり、ケーシングロッド10や推進管
11の接続時に、その推進管回転装置を分解し、発進立坑
１より引き上げた状態で各管の接続作業を行なうように
していたため、管の接続に非常に手間がかかるという不
都合があった。By the way, in the conventional pipe propulsion device, the propulsion pipe rotating device for rotating the propulsion pipe 11 is provided on the upper side of the tip of the slide base 2, and the casing rod 10 and the propulsion pipe are provided.
At the time of connecting 11, the propulsion pipe rotating device was disassembled, and the work of connecting the pipes was carried out in a state of being pulled up from the starting shaft 1, so there was a problem that it took a lot of time and effort to connect the pipes.
また、推進管11および偏心先導管12を回転させる方向修
正に際し、推進管11と地山との間に大きな摩擦抵抗があ
り、しかも推進機本体３を停止させた状態で推進管11を
回転させる必要があるため、推進管11に大きな回転力を
付与する必要があると共に、方向修正に時間を要する不
都合がある。In addition, when correcting the direction in which the propulsion pipe 11 and the eccentric tip conduit 12 are rotated, there is a large frictional resistance between the propulsion pipe 11 and the natural ground, and the propulsion pipe 11 is rotated while the propulsion device body 3 is stopped. Since it is necessary, it is necessary to apply a large rotational force to the propulsion pipe 11, and there is an inconvenience that it takes time to correct the direction.
この考案は上記の不都合を解消し、ケーシングロッドや
推進管の接続作業の容易化と推進管を回転させる作業時
間の大巾な短縮を図ることができる推進管回転装置を提
供することを技術的課題としている。This invention eliminates the above-mentioned inconveniences and provides a propulsion pipe rotating device capable of facilitating the connecting work of a casing rod and a propulsion pipe and greatly shortening the work time for rotating the propulsion pipe. It is an issue.
上記の課題を解決するために、この考案においては、切
削ビットを先端に有するケーシングロッドの外側に偏心
先導管を先端に有する推進管を回転自在に設け、立坑内
に設置された推進機本体の移動によってケーシングロッ
ドおよび推進管を地中に圧入しつつその推進機本体に取
付けられたモータの駆動によりケーシングロッドを回転
させ、前記切削ビットの回転により推進管と略同径の孔
を形成しつつケーシングロッドと推進管とを地中に推進
させ、上記推進管と共に回転する偏心先導管の回転によ
って推進方向を修正する推進管回転装置において、前記
推進機本体の前側部に支持筒を取付け、その支持筒の先
端部に前記推進管の後端を押圧する加圧リングを回転自
在に取付け、この加圧リングに推進管を挾持するチャッ
ク装置を設け、前記支持筒の外側に加圧リングを回転さ
せる回転駆動装置を設けた構成を採用している。In order to solve the above problems, in the present invention, a propulsion pipe having an eccentric tip conduit at its tip is rotatably provided outside a casing rod having a cutting bit at its tip, and While pushing the casing rod and the propulsion pipe into the ground by the movement, the casing rod is rotated by the drive of the motor attached to the main body of the propulsion device, and the hole having substantially the same diameter as the propulsion pipe is formed by the rotation of the cutting bit. In a propulsion pipe rotating device that propels a casing rod and a propulsion pipe into the ground and corrects the propulsion direction by rotation of an eccentric tip conduit that rotates together with the propulsion pipe, a support cylinder is attached to the front side portion of the propulsion device main body, and A pressure ring that presses the rear end of the propulsion tube is rotatably attached to the tip of the support tube, and a chuck device that holds the propulsion tube is provided on the pressure ring. On the outside of the support tube adopts a configuration in which a rotary drive for rotating the pressure ring.
上記の構成から成る推進管回転装置においては、推進機
本体と共に移動する加圧リングの押圧部で推進管の後端
部を押圧して軸方向に移動させる。In the propulsion tube rotating device having the above-described configuration, the rear end portion of the propulsion tube is pressed by the pressing portion of the pressure ring that moves together with the main body of the propulsion device to move it in the axial direction.
また、推進管の内部に組込まれたケーシングロッドの移
動方向の修正に際しては、加圧リング１に設けられたチ
ャック装置で推進管を挾持し、回転駆動装置の作動によ
り加圧リングを回転し、そ加圧リングと共に偏心先導管
を有する推進管を回転させるのである。このとき、推進
機本体を移動させながら行なうと推進管を容易に回転さ
せることができる。Further, when correcting the moving direction of the casing rod incorporated inside the propulsion pipe, the propulsion pipe is held by the chuck device provided in the pressure ring 1, and the pressure ring is rotated by the operation of the rotary drive device. The propulsion tube having an eccentric tip conduit is rotated with the pressure ring. At this time, the propulsion tube can be easily rotated by moving the main body of the propulsion device.
以下、この考案の実施例を第１図乃至第３図に基づいて
説明する。An embodiment of the present invention will be described below with reference to FIGS.
この考案に係る推進管回転装置は、第４図および第５図
に示す管推進装置の押しリング６に変えて使用する。The propulsion pipe rotating device according to the present invention is used in place of the push ring 6 of the pipe propulsion device shown in FIGS. 4 and 5.
図示のように、推進管回転装置は、支持筒20を有し、そ
の支持筒20は、スピンドルロッド７が挿入可能な大きさ
になり、後端部に設けたフランジ21が推進機本体３の前
面にねじ等の手段を介して固定されている。As shown in the figure, the propulsion tube rotating device has a support cylinder 20, the support cylinder 20 has a size into which the spindle rod 7 can be inserted, and a flange 21 provided at a rear end portion of the propulsion device main body 3 is provided. It is fixed to the front surface by means of screws or the like.
支持筒20の先端部には加圧リング22が回転自在に接続さ
れ、その加圧リング22の後端部内周に設けた段23に推進
管11の後端部が挿入可能な環状溝24が形成され、この環
状溝24の底面が押圧部25とされている。A pressure ring 22 is rotatably connected to the tip of the support cylinder 20, and an annular groove 24 into which the rear end of the propulsion pipe 11 can be inserted is provided in a step 23 provided on the inner circumference of the rear end of the pressure ring 22. The bottom surface of the annular groove 24 formed is used as the pressing portion 25.
加圧リング22の先端部内側には、推進管11を挾持するチ
ャック装置30が設けられている。ここで、チャック装置
30は、加圧リング22の内側に複数の円弧状締付片31を周
方向に等間隔に設け、各締付片31の外周面に設けた突軸
32を加圧リング22に形成した半径方向の孔33にスライド
自在に挿入し、加圧リング22の外側に突出する突出軸33
の先端に抜け止め板34をねじ止めし、この抜け止め板34
を外方向に押圧する複数のスプリング35によって締付片
31を外径方向に移動させ、加圧リング22に支持された複
数の加圧シリンダ36により締付片31を加圧リング22の内
径方向に移動させるようにしている。A chuck device 30 that holds the propulsion tube 11 is provided inside the tip of the pressure ring 22. Where chuck device
Reference numeral 30 denotes a projecting shaft provided on the outer peripheral surface of each tightening piece 31 by providing a plurality of arcuate tightening pieces 31 in the pressure ring 22 at equal intervals in the circumferential direction.
32 is slidably inserted into a radial hole 33 formed in the pressure ring 22, and the protrusion shaft 33 protrudes to the outside of the pressure ring 22.
Secure the retaining plate 34 to the tip of the
A plurality of springs 35 that press the
31 is moved in the outer diameter direction, and the fastening pieces 31 are moved in the inner diameter direction of the pressure ring 22 by the plurality of pressure cylinders 36 supported by the pressure ring 22.
上記のように、締付片31を抜け止め板34にねじ止めする
と、破損、損傷による締付片31の交換を行なうことがで
きると共に、厚みの異なる締付片31と交換することがで
きるため、径が異なる推進管11も確実に挾持することが
できる。As described above, when the fastening piece 31 is screwed to the retaining plate 34, it is possible to replace the fastening piece 31 due to breakage or damage and to replace the fastening piece 31 with a different thickness. The propelling pipes 11 having different diameters can be surely held.
前記加圧リング22は、回転駆動装置40の作動によって回
転される。回転駆動装置40は回転用シリンダ41から成
り、そのシリンダ41の一端は支持筒20の外周に形成した
支持片42に連結され、シリンダ41の他端は加圧リング22
に設けた連結軸43に連結されている。The pressure ring 22 is rotated by the operation of the rotation driving device 40. The rotation drive device 40 is composed of a rotation cylinder 41, one end of which is connected to a support piece 42 formed on the outer periphery of the support cylinder 20, and the other end of which is the pressure ring 22.
Is connected to a connecting shaft 43 provided in the.
実施例で示す推進管回転装置は上記の構造から成り、推
進管11の圧入に際しては、その推進管11の後端部を加圧
リング22の環状溝24に挿入し、その状態で第５図に示す
推進ジャッキ４の作動により推進機本体３をスライドベ
ース２に沿って移動させ、その推進機本体３と共に移動
する加圧リング22によって推進管11を軸方向に移動させ
る。The propulsion tube rotating device shown in the embodiment has the above-mentioned structure, and when the propulsion tube 11 is press-fitted, the rear end portion of the propulsion tube 11 is inserted into the annular groove 24 of the pressurizing ring 22, and in that state. The propulsion body 4 is moved along the slide base 2 by the operation of the propulsion jack 4 shown in FIG. 2, and the propulsion pipe 11 is moved in the axial direction by the pressure ring 22 that moves together with the propulsion body 3.
また、推進管11の内側に挿入されたケーシングロッド10
の移動方向の変更に際しては、加圧シリンダ36を作動
し、加圧リング22の内径方向に移動する締付片31で推進
管11を挾持し、その挾持状態において回転用シリンダ41
を作動し、加圧リング22と共に推進管11を回転させる。Also, the casing rod 10 inserted inside the propulsion pipe 11
When changing the moving direction of the pressurizing cylinder 36, the pressing cylinder 36 is operated, and the propulsion pipe 11 is held by the fastening piece 31 that moves in the inner diameter direction of the pressing ring 22, and the rotating cylinder 41 is held in the held state.
Is operated to rotate the propulsion pipe 11 together with the pressure ring 22.
上記推進管11の大巾な回転に際しては、チャック装置30
が推進管11を挾持する状態において回転用シリンダ41を
前進させる動作と、その回転用シリンダ41の前進停止時
にチャック装置30の挾持を解除して回転用シリンダ41を
後退させる動作とを交互に繰り返し行なうようにする。When the propulsion pipe 11 is widely rotated, the chuck device 30
Alternately repeats the operation of moving the rotation cylinder 41 forward while holding the propulsion pipe 11 and the operation of releasing the holding of the chuck device 30 and retracting the rotation cylinder 41 when the rotation cylinder 41 is stopped from moving forward. Try to do it.
上記のような方向修正に際し、発進機本体３を移動させ
乍ら推進管11を回転させることにより推進管11を小さな
力で容易に回転させることができる。When the direction is corrected as described above, the propulsion pipe 11 can be easily rotated with a small force by moving the starter body 3 and rotating the propulsion pipe 11.
ケーシングロッド10や推進管11の接続に際しては、推進
管回転装置のチャック装置30を挾持解除状態として推進
機本体３を後退動させ、圧入後の推進管と加圧リング22
との間に形成された空間に継ぎ足し用のケーシングロッ
ド10および推進管11を落し込み、その継ぎ足し用のケー
シングロッド10を先に圧入されたケーシングロッド10に
接続する。At the time of connecting the casing rod 10 and the propulsion pipe 11, the chuck device 30 of the propulsion pipe rotating device is put in the released state to move the propulsion device main body 3 backward, and the propulsion pipe and the pressure ring 22 after press fitting
The casing rod (10) and the propulsion pipe (11) for addition are dropped into the space formed between and, and the casing rod (10) for addition is connected to the casing rod (10) previously press-fitted.
以上のように、この考案に係る推進管回転装置によれ
ば、推進機本体の前面に固定した支持筒に推進管の圧入
用加圧シリンダを回転自在に接続し、その加圧リングに
推進管を挾持するチャック装置を設け、支持筒の外周に
は加圧リングの回転駆動装置を設けた構成としたので、
推進管やケーシングロッドの継ぎ足しに際して推進管回
転装置を分解する必要がなく、後続管の接続作業をきわ
めて簡単に行なうことができる。また、推進管を圧入し
ながら回転させることができるため、推進管を小さな回
転力によって回転させることができ、推進管の推進方向
の修正が容易である。As described above, according to the propulsion tube rotating device of the present invention, the pressurizing pressurizing cylinder of the propulsion tube is rotatably connected to the support cylinder fixed to the front surface of the propulsion body, and the propulsion tube is connected to the pressing ring. Since a chuck device for holding the pressure ring is provided and a rotation driving device for the pressure ring is provided on the outer periphery of the support cylinder,
Since it is not necessary to disassemble the propulsion pipe rotating device when the propulsion pipe and the casing rod are replenished, the connecting work of the succeeding pipe can be performed very easily. Further, since the propulsion pipe can be rotated while being press-fitted, the propulsion pipe can be rotated by a small rotational force, and the propulsion direction of the propulsion pipe can be easily corrected.
第１図はこの考案に係る装置の一実施例を示す縦断正面
図、第２図は同上のII−II線に沿った断面図、第３図は
同上の平面図、第４図は管推進装置の正面図、第５図は
同上の縦断正面図である。 ３……推進機本体、４……推進ジャッキ、７……スピン
ドルロッド、８……チャック、９……切削ビット、10…
…ケーシングロッド、11……推進管、12……偏心先導
管、20……支持筒、22……加圧リング、25……押圧部、
30……チャック装置、31……締付片、36……加圧シリン
ダ、40……回転駆動装置、41……回転用シリンダ。FIG. 1 is a vertical sectional front view showing an embodiment of the device according to the present invention, FIG. 2 is a sectional view taken along line II-II of the same, FIG. 3 is a plan view of the same, and FIG. A front view of the apparatus and FIG. 5 are vertical front views of the same. 3 ... Propulsion machine body, 4 ... Propulsion jack, 7 ... Spindle rod, 8 ... Chuck, 9 ... Cutting bit, 10 ...
… Casing rod, 11 …… Propulsion pipe, 12 …… Eccentric tip conduit, 20 …… Support tube, 22 …… Pressure ring, 25 …… Pressing part,
30 …… Chuck device, 31 …… Tightening piece, 36 …… Pressure cylinder, 40 …… Rotation drive device, 41 …… Rotation cylinder.
フロントページの続き (56)参考文献 特開 昭53−5813（ＪＰ，Ａ) 特開 昭59−195998（ＪＰ，Ａ) 特開 昭62−225693（ＪＰ，Ａ) 特開 昭62−225690（ＪＰ，Ａ)Continuation of the front page (56) Reference JP-A-53-5813 (JP, A) JP-A-59-195998 (JP, A) JP-A-62-225693 (JP, A) JP-A-62-225690 (JP , A)
Claims (3)
ドの外側に偏心先導管を先端に有する推進管を回転自在
に設け、立坑内に設置された推進機本体の移動によって
ケーシングロッドおよび推進管を地中に圧入しつつその
推進機本体に取付けられたモータの駆動によりケーシン
グロッドを回転させ、前記切削ビットの回転により推進
管と略同径の孔を形成しつつケーシングロッドと推進管
とを地中に推進させ、上記推進管と共に回転する偏心先
導管の回転によって推進方向を修正する推進管回転装置
において、前記推進機本体の前側部に支持筒を取付け、
その支持筒の先端部に前記推進管の後端を押圧する加圧
リングを回転自在に取付け、この加圧リングに推進管を
挾持するチャック装置を設け、前記支持筒の外側に加圧
リングを回転させる回転駆動装置を設けたことを特徴と
する推進管回転装置。1. A propulsion pipe having an eccentric tip conduit at its tip is rotatably provided outside a casing rod having a cutting bit at its tip, and the casing rod and the propulsion tube are grounded by movement of a propulsion unit body installed in a shaft. The casing rod is rotated by driving a motor attached to the main body of the propulsion machine while press-fitting the inside, and the casing rod and the propulsion tube are grounded by forming a hole having substantially the same diameter as the propulsion pipe by the rotation of the cutting bit. In a propulsion pipe rotating device that corrects the propulsion direction by rotation of an eccentric tip conduit that rotates together with the propulsion pipe, a support cylinder is attached to the front side portion of the propulsion unit main body,
A pressure ring that presses the rear end of the propulsion tube is rotatably attached to the tip of the support tube, and a chuck device that holds the propulsion tube is provided on the pressure ring, and the pressure ring is provided outside the support tube. A propulsion-tube rotating device provided with a rotation driving device for rotating.
組込まれた複数の締付片と、そのチャック片を加圧リン
グの半径方向に移動させるシリンダとから成る請求項
（１）に記載の推進管回転装置。2. The chucking device according to claim 1, wherein the chucking device comprises a plurality of tightening pieces assembled inside the pressure ring, and a cylinder for moving the chucking pieces in the radial direction of the pressure ring. Propulsion tube rotating device.
接続され、他端が加圧リングに接続された回転用シリン
ダから成る請求項（１）記載の推進管回転装置。3. The propulsion-tube rotating device according to claim 1, wherein the rotary drive device comprises a rotating cylinder, one end of which is connected to an outer periphery of a cylindrical body and the other end of which is connected to a pressure ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990115829U JPH0732631Y2 (en) | 1990-11-02 | 1990-11-02 | Propulsion tube rotating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990115829U JPH0732631Y2 (en) | 1990-11-02 | 1990-11-02 | Propulsion tube rotating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0473089U JPH0473089U (en) | 1992-06-26 |
| JPH0732631Y2 true JPH0732631Y2 (en) | 1995-07-26 |
Family
ID=31863631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990115829U Expired - Lifetime JPH0732631Y2 (en) | 1990-11-02 | 1990-11-02 | Propulsion tube rotating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0732631Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010285843A (en) * | 2009-06-15 | 2010-12-24 | Kinki Kaihatsu:Kk | Pipe propelling device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2811397B2 (en) * | 1992-12-11 | 1998-10-15 | 株式会社奥村組 | Method and apparatus for preventing rolling of propulsion tube |
| JP7265465B2 (en) * | 2019-11-05 | 2023-04-26 | 大成建設株式会社 | Propulsion method and propulsion device for curved pipe |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS535813A (en) * | 1976-07-05 | 1978-01-19 | Minoru Seya | Earth drilling apparatus |
| JPS59195998A (en) * | 1983-04-23 | 1984-11-07 | 東邦地下工機株式会社 | Pipe embedding apparatus |
-
1990
- 1990-11-02 JP JP1990115829U patent/JPH0732631Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010285843A (en) * | 2009-06-15 | 2010-12-24 | Kinki Kaihatsu:Kk | Pipe propelling device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0473089U (en) | 1992-06-26 |
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| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
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| EXPY | Cancellation because of completion of term |