JPH02256796A - Driving device for driving method - Google Patents
Driving device for driving methodInfo
- Publication number
- JPH02256796A JPH02256796A JP1079108A JP7910889A JPH02256796A JP H02256796 A JPH02256796 A JP H02256796A JP 1079108 A JP1079108 A JP 1079108A JP 7910889 A JP7910889 A JP 7910889A JP H02256796 A JPH02256796 A JP H02256796A
- Authority
- JP
- Japan
- Prior art keywords
- propulsion
- receiving surface
- receiving
- retaining
- propellant
- 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】
〔産業上の利用分野〕
推進体の複数個が継手部を介して屈曲自在に連結され、
前記継手部が、前記推進体の推進方向前端部に推進体長
手方向に沿う姿勢で設けられた細部と、その軸部の先端
部に設けられた球状部と、前記推進体の推進方向後端部
に前記球状部の外周面に外嵌するように設けられた受部
とから成り、前記受部は、前記球状部の推進方向前方側
への移動を受け止める推進用の受面と、前記球状部の推
進方向後方側への移動を受け止める抜止用の受面とを備
えている推進工法用の推進装置に関する。[Detailed Description of the Invention] [Industrial Field of Application] A plurality of propellants are bendably connected via a joint,
A detail in which the joint part is provided at the front end of the propellant in the propulsion direction in a posture along the longitudinal direction of the propellant, a spherical part provided at the tip of the shaft part, and a rear end of the propellant in the propulsion direction. and a receiving part provided to fit onto the outer circumferential surface of the spherical part; The present invention relates to a propulsion device for a propulsion construction method, which is provided with a receiving surface for preventing the part from falling out and receiving the movement of the part toward the rear in the propulsion direction.
従来の推進工法用の推進装置では、第５図に示すように
、球状部（１２ｂ）の中心を通る断面視において、推進
用の受面（１３ａ）の推進体径方向での内方端部と抜止
用の受面（１３ｂ）の推進体径方向での内方端部とを推
進体径方向において同じ位置に位置させて、推進用の受
面（１３ａ）と抜止用の受面（１３ｂ）とがほぼ同一の
面積を有するように構成されていた。In the propulsion device for the conventional propulsion method, as shown in FIG. and the inner end of the retaining surface (13b) in the radial direction of the propelling body are located at the same position in the radial direction of the propelling body, and the receiving surface (13a) for propulsion and the retaining surface (13b) ) had almost the same area.
一般に、推進工法用の推進装置では、受部の推進用の受
面や抜止用の受面の面積を極力広くして、スラスト力の
ために、受部が早期に摩耗損傷することを回避すること
が望まれる。In general, in propulsion devices for propulsion methods, the area of the propulsion receiving surface and retaining surface of the receiving part is made as wide as possible to avoid premature wear and damage of the receiving part due to thrust force. It is hoped that
しかしながら、推進用の受面や抜止用の受面の面積を大
きくすべく、推進用の受面や抜止用の受面の推進体径方
向での内方端部を推進体径方向内方側に位置させると、
抜止用の受面の推進体径方向内方側端部が軸部へ接触す
ることによって隣り合う推進体同士の最大屈曲角が小さ
くなる。これを防止するため、軸部の直径を小さくする
ことが考えられるが、この場合軸部の強度が小さくなり
、推進体同士の接続強度が小さくなる。従って、従来の
推進装置では、隣り合う推進体同士の最大屈曲角を大き
くしながらも、受部の摩耗損傷を回避することと、推進
体同士の接続強度の低下を回避することを満足させるこ
とができないものであり、改善が望まれていた。However, in order to increase the area of the propulsion receiving surface and the retaining surface, the inner end of the propulsion receiving surface and the retaining surface in the radial direction of the propellant is moved toward the inner side in the radial direction of the propellant. If you position it at
When the inner end of the retaining surface in the radial direction of the propellant comes into contact with the shaft portion, the maximum bending angle between adjacent propellants becomes smaller. In order to prevent this, it is conceivable to reduce the diameter of the shaft portion, but in this case, the strength of the shaft portion will be reduced, and the strength of the connection between the propelling bodies will be reduced. Therefore, in the conventional propulsion device, it is necessary to satisfy the requirements of avoiding wear and tear on the receiving part and avoiding a decrease in the connection strength between the propelling bodies, while increasing the maximum bending angle between adjacent propelling bodies. It was impossible to do so, and improvements were desired.
本発明は、隣合う推進体同士の最大屈曲角を大きくしな
がらも、受部の摩耗損傷を回避し、しかも推進体同士の
接続強度の低下を回避できる推進工法用の推進装置を提
供することを目的としている。An object of the present invention is to provide a propulsion device for a propulsion method that can increase the maximum bending angle between adjacent propulsion bodies while avoiding wear and tear on a receiving part and also avoiding a decrease in connection strength between the propulsion bodies. It is an object.
上記目的を達成するために本発明では、前記受部が、前
記球状部の中心を通る断面視において、前記推進用の受
面の推進体径方向での内方端部を、前記抜止用の受面の
推進体径方向での内方端部よりも推進体径方向内方側に
位置させて、前記推進用の受面が前記抜止用の受面より
も広い面を有するように構成されている点を特徴として
いる。In order to achieve the above-mentioned object, in the present invention, the receiving part is arranged such that, in a cross-sectional view passing through the center of the spherical part, the inner end of the propulsion receiving surface in the radial direction of the propelling body is connected to the retaining part. The receiving surface for propulsion is configured to have a wider surface than the receiving surface for retaining, by being located inward in the radial direction of the propelling body than the inner end of the receiving surface in the radial direction of the propelling body. It is characterized by the fact that
受部の推進用受面に作用するスラスト力は、推進体を土
中を推進させるに伴う反力として作用するものであるた
め大きなものであるが、受部の抜止め用受面に作用する
スラスト力は、推進体を土中から引き抜くに伴う反力と
して作用するものであるため小さなものである。The thrust force that acts on the propulsion receiving surface of the receiving part is large because it acts as a reaction force when the propellant is propelled through the soil, but the thrust force that acts on the retaining receiving surface of the receiving part is large. The thrust force is small because it acts as a reaction force when the propellant is pulled out of the soil.
そこで、推進用の受面は積極的に広くして、推進に伴う
大きなスラスト力でも十分に受け止められるようにする
。また、抜止用の受面ば推進用の受面よりも狭くして、
軸部の直径を細くすることなしに最大屈曲角を極力大き
くできるようにする。Therefore, the propulsion receiving surface is actively made wider so that it can sufficiently absorb the large thrust force associated with propulsion. Also, the retaining surface is narrower than the propulsion receiving surface,
To make the maximum bending angle as large as possible without reducing the diameter of a shaft part.
その結果、隣り合う推進体同士の最大屈曲角を大きくし
ながらも、受部の摩耗損傷を回避し、しかも、推進体同
士の接続強度の低下を回避できるものであり、もって、
冒記要望を満足させて、−層良好に使用できる推進工法
用の推進装置を得るに至った。As a result, it is possible to increase the maximum bending angle between adjacent propellants while avoiding wear and tear on the receiving parts, and also to avoid a decrease in the connection strength between the propellants.
A propulsion device for a propulsion method that satisfies the above requirements and can be used satisfactorily in layers has been obtained.
以下、本発明の実施例を図面に基づいて説明する。 Embodiments of the present invention will be described below based on the drawings.
第２図に示すように、外面が円筒面状の推進体としての
、推進用ヘッド（１）や複数の推進管（２）が継手部（
Ｊ）を介して屈曲自在に連結されて、土中において屈曲
しながら推進してい（ことが可能な推進工法用の推進装
置を構成しである。As shown in Fig. 2, a propulsion head (1) and a plurality of propulsion tubes (2) as a propulsion body with a cylindrical outer surface are connected to a joint part (
J), which constitutes a propulsion device for a propulsion method that can be bent and propelled underground.
第１図に示すように、推進用ヘッド（１）は、管状の推
進ヘッド本体（ＩＡ）と、推進用ヘッド本体（ＩＡ）に
対してその長手方向に沿う軸芯（Ｐ）周りで回動自在な
掘削部（３）、及び掘削部（３）を回転操作する操作装
置（４）から成る。As shown in Fig. 1, the propulsion head (1) has a tubular propulsion head body (IA) and rotates around an axis (P) along the longitudinal direction of the propulsion head body (IA). It consists of a flexible excavation part (3) and an operating device (4) for rotating the excavation part (3).
前記掘削部（３）には、推進管（２）を地中推進させる
に伴って土圧を受けて、その土庄を受けた方向に推進用
ヘッド（１）の推進方向を向けるための受圧面（Ｆ）を
、長手方向と交差する傾斜面に形成し、更に、水を噴射
して旋回推進方向側の土質を軟弱化させて旋回推進性を
向上させるための水噴射ノズル（５）を設けである。The excavation part (3) has a pressure receiving surface that receives earth pressure as the propulsion pipe (2) is propelled underground and directs the propulsion head (1) in the direction in which it receives the earth pressure. (F) is formed on an inclined surface that intersects with the longitudinal direction, and is further provided with a water injection nozzle (5) for injecting water to soften the soil in the direction of turning propulsion and improve turning propulsion. It is.
つまり、前記推進用ヘッド（１）を直進させる時は、推
進ヘッド本体（ＩＡ）に対して掘削部（３）を回転させ
ながら推進させていく。また、推進用ヘッド（１）を旋
回させる時には、旋回させるべき側に土圧を受けるよう
に受圧面（Ｆ）を向けて推進させていく。水噴射ノズル
（５）によって旋回方向側の土質が軟弱化されているた
めに、土から受ける抵抗が少なくて推進用ヘッド（１）
は抵抗少なく旋回していく。That is, when the propulsion head (1) is moved straight, it is propelled while rotating the excavation part (3) with respect to the propulsion head main body (IA). Furthermore, when the propulsion head (1) is turned, it is propelled with the pressure receiving surface (F) directed so as to receive earth pressure on the side to be turned. Since the soil in the direction of rotation is softened by the water injection nozzle (5), there is less resistance from the soil and the propulsion head (1)
turns with less resistance.
尚、図示はしないが、例えば前記掘削部（３）の内部に
は重錘式のセンサを内蔵して、土中においても受圧面（
Ｆ）が上下左右いかなる方向に向いているかを検出でき
るようになっている。Although not shown, for example, a weight-type sensor is built into the excavation part (3), so that the pressure-receiving surface (
It is possible to detect which direction F) is facing, up, down, left or right.
これにより、上述の如く受圧面（Ｆ）の向きを変更する
際に、受圧面（Ｆ）の向きを所望の向きに適切に向ける
ことができる。Thereby, when changing the direction of the pressure receiving surface (F) as described above, the direction of the pressure receiving surface (F) can be appropriately directed to a desired direction.
前記操作装置（４）は、推進用ヘッド本体（ＩＡ）に内
嵌され、且つ、キー（６）によって回動を規制されて往
復動する筒状の油圧ピストン（７）と、掘削部（３）の
後部に相対回転不能に連結され、且つ、油圧ピストン（
７）が外嵌螺合する螺合溝を備えている回転軸（８）と
、圧油を吸排して油圧ピストン（７）を往復移動させる
一対の圧油供給部（９Ａ）、 （９Ｂ）とを有している
。The operating device (4) includes a cylindrical hydraulic piston (7) that is fitted into the propulsion head main body (IA) and that reciprocates while its rotation is restricted by a key (6), and an excavating portion (3). ) is connected to the rear part of the hydraulic piston (
7) is provided with a threaded groove into which it is externally fitted, and a pair of pressure oil supply parts (9A) and (9B) that suck and discharge pressure oil and reciprocate the hydraulic piston (7). It has
そして前記回転軸（８）の内部には、水噴射ノズル（５
）に水を供給するための配管（１０）を通してあり、こ
の配管（１０）は、圧油供給部（９Ａ）、 （９Ｂ）に
接続される２本の油圧配管（ＩＩＡ）、 （ＩＩＢ）と
共に後述する継手部材（１２）を通して後方の推進管（
２）へ導いである。A water injection nozzle (5) is provided inside the rotating shaft (8).
), and this pipe (10) is connected to the pressure oil supply section (9A), (9B) along with two hydraulic pipes (IIA) and (IIB). The rear propulsion pipe (
This leads to 2).
かかる構造により、一方の圧油供給部（９Ａ又は９Ｂ）
から圧油を供給し、他方の圧油供給部（９Ｂ又は９Ａ）
から圧油を戻すと、それによって油圧ピストン（７）が
往復移動するとともに、この油圧ピストン（７）に螺合
している回転軸（８）が正逆に回転し、掘削部（３）が
軸芯（Ｐ）周りに回転駆動されるようになっている。こ
の油圧ピストン（７）が−往復する間に、掘削部（３）
は少なくとも３６０度以上回転するようになっている。With this structure, one pressure oil supply section (9A or 9B)
Pressure oil is supplied from the other pressure oil supply part (9B or 9A)
When the pressure oil is returned from the source, the hydraulic piston (7) reciprocates, and the rotating shaft (8) screwed into the hydraulic piston (7) rotates in forward and reverse directions, causing the excavation part (3) to move forward and backward. It is designed to be rotated around an axis (P). While this hydraulic piston (7) reciprocates, the excavation part (3)
is designed to rotate at least 360 degrees.
ところで詳しくは説明しないが、掘削部（３）を硬質の
土壌で回転する際には、推進ヘッド本体（ＩＡ）が反力
によって逆方向に回転しようとする。これを防止するた
めに、例えば推進ヘッド本体（ＩＡ）の外周面に推進体
長手方向に沿う突条を設けたり、或いは、上述の配管（
ＩＩＡ）、 （ＩＩＢ）と推進用ヘッド（１）とを連結
することによって、推進用ヘッド（１）の回り止めを図
るようにするとよい。By the way, although not explained in detail, when the excavation part (3) is rotated in hard soil, the propulsion head main body (IA) tries to rotate in the opposite direction due to reaction force. In order to prevent this, for example, protrusions along the longitudinal direction of the propellant may be provided on the outer peripheral surface of the propulsion head main body (IA), or the above-mentioned piping (
IIA), (IIB) and the propulsion head (1) may be connected to prevent the propulsion head (1) from rotating.
次に、前記推進用ヘッド（１）とその後方で隣接する推
進管（２）との連結する継手部（Ｊ）の構造について説
明する。尚、推進管（２）同士を連結する継手部（Ｊ）
も同じ構造である。Next, the structure of the joint part (J) that connects the propulsion head (1) and the propulsion pipe (2) adjacent thereto will be explained. In addition, the joint part (J) that connects the propulsion pipes (2)
has the same structure.
前記推進用ヘッド（１）と推進管（２）との連結のため
に継手部材（１２）を設けている。この継手部材（１２
）は、推進管（２）の長手方向に沿う姿勢で設けてあり
、後部に形成された軸部（１２ａ）と、その軸部（１２
ａ）の前部に形成されたれた球状部（１２ｂ）とからな
る。継手部材（１２）の軸部（１２ａ）は推進管（２）
の前部に内嵌固定してあり、継手部材（１２）の球状部
（１２ｂ）は推進用ヘッド（１）の後部に設けた受部（
１３）に摺動自在に内嵌しである。前記受部（１３）は
、後方からの押し込み力に相当する推進用のスラスト力
を受け止める推進用の受面（１３ａ）と、推進装置を土
中から抜く際の後方からの引っ張り力に相当する引き抜
き用のスラスト力を受け止める抜止用の受面（１３ｂ）
を形成しである。A joint member (12) is provided to connect the propulsion head (1) and the propulsion pipe (2). This joint member (12
) is provided along the longitudinal direction of the propulsion tube (2), and has a shaft portion (12a) formed at the rear and a shaft portion (12a) formed at the rear thereof.
a) and a spherical part (12b) formed at the front part. The shaft portion (12a) of the joint member (12) is the propulsion tube (2)
The spherical part (12b) of the joint member (12) is fitted into the front part of the propulsion head (1).
13) is slidably fitted inside. The receiving portion (13) is a propulsion receiving surface (13a) that receives a thrust force for propulsion that corresponds to a pushing force from the rear, and a propulsion receiving surface (13a) that receives a thrust force for propulsion that corresponds to a pulling force from the rear when pulling the propulsion device out of the soil. A receiving surface (13b) for receiving the thrust force for pulling out
It is formed.
前記推進用の受面（１３ａ）は、推進用の強いスラスト
力を受けるために広い面にして強度を高めてあり、抜止
用の受面（１３ｂ）は、引き抜き用のスラスト力が弱い
ことと、受部（１３）の後端の内周部と軸部（１２ｂ）
の隙間を十分に保つことで最大屈曲角が損なわれないよ
うにすることとを考慮して、推進用の受面（１３ａ）に
比較して狭い面にしである。即ち、第３図及び第４図に
示すように、前記球状部（１２ｂ）の中心を通る断面視
において、前記推進用の受面（１３ａ）の内側の端部を
、前記抜止用の受面（１３ｂ）の内側の端部よりも軸芯
（Ｐ）側に位置させて、前記推進用の受面（１３ａ）が
前記抜止用の受面（１３ｂ）よりも広い面を有するよう
にしている。The propulsion receiving surface (13a) has a wide surface for increased strength in order to receive a strong thrust force for propulsion, and the receiving surface (13b) for retaining has a weak thrust force for pulling out. , the inner peripheral part of the rear end of the receiving part (13) and the shaft part (12b)
The surface is narrower than the propulsion receiving surface (13a) in consideration of maintaining a sufficient gap so that the maximum bending angle is not impaired. That is, as shown in FIGS. 3 and 4, in a cross-sectional view passing through the center of the spherical portion (12b), the inner end of the propulsion receiving surface (13a) is connected to the retaining receiving surface. (13b) is positioned closer to the axis (P) than the inner end of the propulsion receiving surface (13a), so that the propulsion receiving surface (13a) has a wider surface than the retaining receiving surface (13b). .
尚、特許請求の範囲の項に図面との対照を便利にするた
めに符号を記すが、この記入により本発明は添付図面の
構造に限定されるものではない。Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.
図面は本発明に係る推進工法用の推進装置の実施例を示
し、第１図は推進用ヘッドの縦断側面図、第２図は推進
装置の全体側面図、第３図は第１図の■−■線断面図、
第４図は第１図のＴＶ−ＩＶ線断面図であり、第５図は
従来の推進用ヘッドの縦断側面図である。
（１）、 （２）・・・・・・推進体、（１２ａ）・・
・・・・軸部、（１２ｂ）・・・・・・球状部、（１３
）・・・・・・受部、（１３ａ）・・・・・・推進用の
受面、（１３ｂ）・・・・・・抜止用の受面、（Ｊ）・
・・・・・継手部。The drawings show an embodiment of the propulsion device for the propulsion method according to the present invention, FIG. 1 is a longitudinal side view of the propulsion head, FIG. 2 is an overall side view of the propulsion device, and FIG. −■ Line cross-sectional view,
FIG. 4 is a sectional view taken along the line TV-IV in FIG. 1, and FIG. 5 is a longitudinal sectional side view of the conventional propulsion head. (1), (2)... propellant, (12a)...
...Shaft part, (12b) ... Spherical part, (13
)... Receiving part, (13a)... Receiving surface for propulsion, (13b)... Receiving surface for retaining, (J)...
...Joint part.
Claims (1)
屈曲自在に連結され、前記継手部（Ｊ）が、前記推進体
（１）、（２）の推進方向前端部に推進体長手方向に沿
う姿勢で設けられた軸部（１２ａ）と、その軸部（１２
ａ）の先端部に設けられた球状部（１２ｂ）と、前記推
進体（１）、（２）の推進方向後端部に前記球状部（１
２ｂ）の外周面に外嵌するように設けられた受部（１３
）とから成り、前記受部（１３）は、前記球状部（１２
ｂ）の推進方向前方側への移動を受け止める推進用の受
面（１３ａ）と、前記球状部（１２ｂ）の推進方向後方
側への移動を受け止める抜止用の受面（１３ｂ）とを備
えている推進工法用の推進装置であって、前記受部（１
３）は、前記球状部（１２ｂ）の中心を通る断面視にお
いて、前記推進用の受面（１３ａ）の推進体径方向での
内方端部を、前記抜止用の受面（１３ｂ）の推進体径方
向での内方端部よりも推進体径方向内方側に位置させて
、前記推進用の受面（１３ａ）が前記抜止用の受面（１
３ｂ）よりも広い面を有するように構成されている推進
工法用の推進装置。A plurality of propulsion bodies (1) and (2) are bendably connected via a joint part (J), and the joint part (J) is connected to the front end of the propulsion bodies (1) and (2) in the propulsion direction. The shaft portion (12a) is provided in a posture along the longitudinal direction of the propellant;
a), and a spherical portion (12b) provided at the tip of the propelling body (1), (2), and a spherical portion (12b) provided at the rear end of the propelling body (1), (2) in the propulsion direction.
The receiving part (13
), and the receiving part (13) is comprised of the spherical part (12
b) includes a propulsion receiving surface (13a) that receives the movement of the spherical portion (12b) toward the front side in the propulsion direction, and a retaining surface (13b) that receives the spherical portion (12b) from moving backward in the propulsion direction. A propulsion device for a propulsion method in which the receiving part (1
3), in a cross-sectional view passing through the center of the spherical portion (12b), the inner end of the propulsion receiving surface (13a) in the radial direction of the propellant is connected to the retaining receiving surface (13b). The propulsion receiving surface (13a) is located on the inner side in the propelling body radial direction than the inner end of the propelling body in the radial direction, and the propulsion receiving surface (13a) is connected to the retaining receiving surface (1
3b) A propulsion device for a propulsion method configured to have a wider surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1079108A JPH0715238B2 (en) | 1989-03-29 | 1989-03-29 | Propulsion device for propulsion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1079108A JPH0715238B2 (en) | 1989-03-29 | 1989-03-29 | Propulsion device for propulsion method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02256796A true JPH02256796A (en) | 1990-10-17 |
| JPH0715238B2 JPH0715238B2 (en) | 1995-02-22 |
Family
ID=13680707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1079108A Expired - Fee Related JPH0715238B2 (en) | 1989-03-29 | 1989-03-29 | Propulsion device for propulsion method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0715238B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008038460A (en) * | 2006-08-07 | 2008-02-21 | Nagano Yuki Kk | Excavator for small diameter tunnel formation |
-
1989
- 1989-03-29 JP JP1079108A patent/JPH0715238B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008038460A (en) * | 2006-08-07 | 2008-02-21 | Nagano Yuki Kk | Excavator for small diameter tunnel formation |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0715238B2 (en) | 1995-02-22 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |