JP4686313B2 - Propulsion device - Google Patents

Propulsion device Download PDF

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JP4686313B2
JP4686313B2 JP2005263985A JP2005263985A JP4686313B2 JP 4686313 B2 JP4686313 B2 JP 4686313B2 JP 2005263985 A JP2005263985 A JP 2005263985A JP 2005263985 A JP2005263985 A JP 2005263985A JP 4686313 B2 JP4686313 B2 JP 4686313B2
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pipe
curved
push plate
tube
curved pipe
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JP2007077607A (en
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俊輔 白井
正博 神尾
宏 江原
正義 十二
健司 松井
俊実 藤谷
善久 山本
栄吾 坂東
哲之 糟谷
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Taisei Corp
Kajima Corp
Komatsu Ltd
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Taisei Corp
Kajima Corp
Komatsu Ltd
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Description

本発明は、地中に曲線管を埋設する際に用いられて好適な推進装置に関するものである。   The present invention relates to a propulsion device suitable for use in burying a curved pipe in the ground.

従来、地中に掘削した掘削孔に沿って所定の曲率をもった曲線管を推進・挿入するとともに、先行する曲線管と後続の曲線管とを順次接続して円弧状のパイプ構造物を地中に構築する際に用いられる推進装置として、例えば特許文献1にて提案されているものがある。   Conventionally, a curved pipe having a predetermined curvature is propelled / inserted along a drilling hole excavated in the ground, and an arcuate pipe structure is grounded by sequentially connecting a preceding curved pipe and a succeeding curved pipe. As a propulsion apparatus used when constructing inside, there exists a thing proposed by patent document 1, for example.

特開2005−155057号公報Japanese Patent Application Laid-Open No. 2005-155057

この特許文献1に係る推進装置は、図14に示されるように、トンネル内の床桁102上に設置され、基部103aと傾斜部103bとよりなる架台103と、この架台103の傾斜部103bに沿って移動可能に設けられその傾斜部103b上に配された曲線管104の後端部に嵌合する嵌合部105bを有する押し板105と、この押し板105に推進力を付与する推進ジャッキ106と、前記曲線管104を案内するクランプ式のガイド手段107とを備えて構成されている。この推進装置101においては、これから押し込もうとする曲線管(後行曲線管)104の先端を先に押し込まれた曲線管(先行曲線管)104′の後端に突き合わせて両曲線管104,104′を溶接して後に推進ジャッキ106からの推進力を受けた押し板105にて後行曲線管104を押し込むことにより、それら曲線管104,104′を地中に向けて押し込むことができるようになっている。   As shown in FIG. 14, the propulsion device according to Patent Document 1 is installed on a floor girder 102 in a tunnel, and includes a base 103 including a base 103 a and an inclined part 103 b, and an inclined part 103 b of the base 103. A push plate 105 having a fitting portion 105b fitted to the rear end portion of the curved tube 104 provided so as to be movable along the inclined portion 103b, and a propulsion jack for imparting a propulsive force to the push plate 105 106 and a clamp-type guide means 107 for guiding the curved tube 104. In this propulsion device 101, the curved tube 104 (following curved tube) 104 to be pushed in is brought into contact with the rear end of the curved tube (preceding curved tube) 104 ′ that has been pushed in first, and both curved tubes 104, The curved pipes 104 and 104 'can be pushed into the ground by welding the 104' and then pushing the trailing curved pipe 104 with the push plate 105 that has received the propulsive force from the propulsion jack 106. It has become.

前記従来の推進装置101において、後行曲線管104を先行曲線管104′に突き合わせて溶接する作業を行う際に、先行曲線管104′に対して後行曲線管104の周方向(図14中記号Rで示される矢印方向)の位置が微妙にずれていたり、先行曲線管104′に対して後行曲線管104の縦方向(図14中記号Lで示される矢印方向)の位置が微妙にずれていたりする場合がある。このような位置ずれが生じた場合には、先行曲線管104′に対する後行曲線管104の位置を図示省略されるクレーンを用いて調整する作業が行われる。なお、このクレーンを用いた後行曲線管104の位置調整作業を行うに際しては、押し板105と後行曲線管104との嵌合関係が一旦解除されるとともに、ガイド手段107がアンクランプ状態とされ、その位置調整作業および後行曲線管104の先行曲線管104′への溶接作業がそれぞれ完了した後には、再び後行曲線管104に押し板105の嵌合部105bが嵌合されるとともに、ガイド手段107がクランプ状態とされる。   In the conventional propulsion device 101, when performing the operation of abutting and welding the trailing curved pipe 104 to the leading curved pipe 104 ′, the circumferential direction of the trailing curved pipe 104 with respect to the leading curved pipe 104 ′ (in FIG. 14). The position in the arrow direction indicated by the symbol R is slightly shifted, or the position in the vertical direction of the succeeding curve tube 104 (the arrow direction indicated by the symbol L in FIG. 14) is slightly different from the preceding curve tube 104 ′. It may shift. When such a position shift occurs, an operation for adjusting the position of the trailing curved pipe 104 with respect to the leading curved pipe 104 'using a crane (not shown) is performed. When the position adjustment operation of the trailing curve pipe 104 using this crane is performed, the fitting relationship between the push plate 105 and the trailing curve pipe 104 is once released and the guide means 107 is in the unclamped state. After the position adjustment operation and the welding operation of the succeeding curve tube 104 to the preceding curve tube 104 ′ are completed, the fitting portion 105 b of the push plate 105 is fitted to the succeeding curve tube 104 again. The guide means 107 is clamped.

前述のクレーンを用いた後行曲線管104の位置調整作業は、後行曲線管104を斜めに傾けた状態で吊り上げてその吊り位置をクレーン操作により調整することで成される。しかしながら、かかるクレーン操作だけでは傾斜状態で吊り上げられた後行曲線管104の位置を先行曲線管104′の位置に合わせるように調整することが非常に難しいために、後行曲線管104の位置調整作業に多大な時間を消費してしまう。また、このクレーンを用いた後行曲線管104の位置調整作業の完了後、後行曲線管104を先行曲線管104′に溶接した際に、溶接歪等の影響によって今度は押し板105の嵌合部中心と後行曲線管104の後端部中心とがずれてしまう場合がある。このような中心位置のずれが生じた場合には、後行曲線管104に押し板105を嵌め合わせる作業が極めて困難なものとなり、この嵌合作業に多大な時間を消費してしまう。要するに、前記従来の推進装置101では、これから押し込もうとする曲線管104を当該推進装置101にセットする作業を効率良く行うことができないという問題点がある。   The position adjustment operation of the trailing curved pipe 104 using the above-described crane is performed by lifting the trailing curved pipe 104 obliquely and adjusting the suspension position by crane operation. However, since it is very difficult to adjust the position of the trailing curve pipe 104 lifted in an inclined state to match the position of the preceding curve pipe 104 ′ only by such crane operation, the position adjustment of the trailing curve pipe 104 is performed. A lot of time is consumed in the work. In addition, when the succeeding curved pipe 104 is welded to the preceding curved pipe 104 ′ after the position adjustment work of the trailing curved pipe 104 using this crane is completed, the push plate 105 is now fitted due to the influence of welding distortion or the like. There are cases where the center of the joint and the center of the rear end of the trailing curve tube 104 are displaced. When such a shift in the center position occurs, it becomes extremely difficult to fit the push plate 105 to the trailing curved pipe 104, and this fitting work consumes a lot of time. In short, the conventional propulsion device 101 has a problem in that the work of setting the curved tube 104 to be pushed into the propulsion device 101 cannot be performed efficiently.

本発明は、このような問題点を解消するためになされたもので、曲線管のセット作業を効率良く行うことのできる推進装置を提供することを目的とするものである。   The present invention has been made to solve such problems, and it is an object of the present invention to provide a propulsion device capable of efficiently performing a setting operation of a curved tube.

前記目的を達成するために、発明による推進装置は、
傾斜部を有する架台と、この架台の傾斜部に沿って移動可能に設けられその傾斜部上に配された曲線管の後端部に嵌合する嵌合部を有する押し板と、この押し板に推進力を付与する推進ジャッキとを備える推進装置において、
前記嵌合部の周囲に配されて前記曲線管の径方向の位置を調整する少なくとも3個の管径方向位置調整機構よりなり、前記曲線管の後端部の中心と前記嵌合部の中心とを合わせるセンタリング機構と、
前記嵌合部の周囲に対向配置されて前記曲線管に対し接線方向の押し力を付与する一対の管接線方向押力発生機構よりなり、前記曲線管の周方向位置を調整する管周方向位置調整機構と、
前記架台の傾斜部の中央部に取着され、前記曲線管の下側面に接触して転動するローラを有して前記曲線管の縦方向位置を調整する管縦方向位置調整機構とを設ける
ことを特徴とするものである(第1発明)
In order to achieve the above object, the propulsion device according to the present invention comprises:
A gantry having an inclined portion, a push plate having a fitting portion that is movably provided along the inclined portion of the gantry and is fitted to the rear end portion of the curved pipe disposed on the inclined portion, and the push plate In a propulsion device comprising a propulsion jack that imparts propulsive force to
It is composed of at least three pipe radial position adjusting mechanisms arranged around the fitting part to adjust the radial position of the curved pipe, and the center of the rear end part of the curved pipe and the center of the fitting part A centering mechanism that matches
A pipe circumferential position for adjusting a circumferential position of the curved pipe , comprising a pair of pipe tangential pushing force generating mechanisms that are arranged opposite to each other around the fitting portion and apply a tangential pushing force to the curved pipe. An adjustment mechanism ;
A pipe vertical position adjusting mechanism is provided that is attached to the center of the inclined portion of the gantry and has a roller that rolls in contact with the lower surface of the curved pipe and adjusts the vertical position of the curved pipe. (First invention) .

本発明において、前記管径方向位置調整機構は、前記嵌合部の径方向に揺動可能なアームと、該アームの一端部に回転可能に取着されるローラを備え、前記アームの回動により前記ローラが前記嵌合部の中心に向けて押し込まれるように構成されているのが良い(第2発明)。In the present invention, the pipe radial position adjusting mechanism includes an arm that can swing in the radial direction of the fitting portion, and a roller that is rotatably attached to one end of the arm, and the rotation of the arm. Therefore, it is preferable that the roller is pushed toward the center of the fitting portion (second invention).

また、前記管接線方向押力発生機構は、前記嵌合部の外周面に固着され、前記曲線管の後端部の外周面に突設された突起部を挟むように対向配置される一対の押しボルトの締め付けによって前記曲線管に対し接線方向の押し力を双方向に作用させるものであるのが好ましい(第3発明)。 Further, the pipe tangential direction pressing force generation mechanism is fixed to the outer peripheral surface of the fitting portion, and a pair of opposingly arranged so as to sandwich the protruding portion protruding from the outer peripheral surface of the rear end portion of the curved pipe. It is preferable to apply a tangential pushing force in both directions to the curved pipe by tightening a push bolt (third invention).

さらに、管縦方向位置調整機構は、前記曲線管の下側面に接触して転動するローラをローラ支持部材と、このローラ支持部材に連結されそのローラ支持部材を前記曲線管の縦方向に進退自在に案内する一対のリニアガイドと、この一対のリニアガイドの間に配されて前記ローラ支持部材に推進力を付与するジャッキとを備えて構成されるのが好ましい(第4発明)。Further, the pipe longitudinal direction adjusting mechanism is configured such that a roller that contacts the lower side surface of the curved pipe and rolls is a roller support member, and the roller support member connected to the roller support member is advanced and retracted in the vertical direction of the curved pipe. It is preferable to include a pair of linear guides that are freely guided and a jack that is disposed between the pair of linear guides and applies a propulsive force to the roller support member (fourth invention).

発明の推進装置によれば、曲線管の周方向位置を調整する管周方向位置調整機構と、曲線管の縦方向位置を調整する管縦方向位置調整機構と、曲線管の後端部の中心と押し板の嵌合部の中心とを合わせるセンタリング機構とが設けられるので、先に押し込まれた曲線管に対してこれから押し込もうとする曲線管の周方向位置がずれていたとしても、また先に押し込まれた曲線管に対してこれから押し込もうとする曲線管の縦方向位置がずれていたとしても、更に押し板の嵌合部の中心に対してこれから押し込もうとする曲線管の後端部の中心位置がずれていたとしても、前記周方向位置のずれは管周方向位置調整機構によって、また前記縦方向位置のずれは管縦方向位置調整機構によって、更に前記中心位置のずれはセンタリング機構によってそれぞれ容易になくすことができる。したがって、これから押し込もうとする曲線管の当該推進装置へのセット作業を効率良く行うことができる。 According to the propulsion device of the present invention, a pipe circumferential position adjusting mechanism for adjusting the circumferential position of the curved pipe, a pipe vertical position adjusting mechanism for adjusting the vertical position of the curved pipe, and a rear end portion of the curved pipe Since a centering mechanism that matches the center and the center of the fitting portion of the push plate is provided, even if the circumferential position of the curved tube to be pushed is shifted from the previously pushed curved tube, Moreover, even if the vertical position of the curved tube to be pushed is shifted with respect to the previously pushed curved tube, the curved tube to be pushed further into the center of the fitting portion of the push plate from now on. Even if the center position of the rear end portion is shifted, the shift in the circumferential position is caused by the pipe circumferential position adjustment mechanism, and the shift in the vertical position is further caused by the pipe vertical position adjustment mechanism. The deviation is due to the centering mechanism. Can be eliminated easily, respectively Te. Therefore, it is possible to efficiently perform the setting work of the curved tube to be pushed into the propulsion device.

次に、本発明による推進装置の具体的な実施の形態について、図面を参照しつつ説明する。なお、以下に述べる実施の形態は、互いに間隔を存して水平方向に延びるように地中に並設される一対のトンネルの間において、地中に掘削した掘削孔に沿って所定の曲率をもった曲線管を斜め下方に向けて推進・挿入するとともに、先行する曲線管と後続の曲線管とを順次接続して円弧状のパイプ構造物を地中に構築する際に用いられる推進装置に本発明が適用された例である。   Next, specific embodiments of the propulsion device according to the present invention will be described with reference to the drawings. The embodiment described below has a predetermined curvature along the excavation hole excavated in the ground between a pair of tunnels arranged in parallel in the ground so as to extend in the horizontal direction with a space between each other. A propulsion device used to construct an arc-shaped pipe structure in the ground by sequentially connecting the preceding curved tube and the succeeding curved tube in order to propel and insert the curved tube with the diagonally downward direction. This is an example to which the present invention is applied.

図1には、本発明の一実施形態に係る推進装置の側面図が示されている。また、図2には押し板の正面図が示され、図3には押し板の背面図が示されている。   FIG. 1 shows a side view of a propulsion device according to an embodiment of the present invention. 2 shows a front view of the push plate, and FIG. 3 shows a rear view of the push plate.

本実施形態の推進装置1は、図1に示されるように、トンネル(図示省略)内の床桁2上に設置される架台3と、これから押し込もうとする曲線管4の後面に当接する押し板5と、この押し板5に推進力を付与する一対の推進ジャッキ6と、曲線管4を案内するガイド手段7とを備えている。この推進装置1においては、これから押し込もうとする曲線管(後行曲線管)4の先端を先に押し込まれた曲線管(先行曲線管)4′の後端に突き合わせて両曲線管4,4′を溶接して後に推進ジャッキ6からの推進力を受けた押し板5にて後行曲線管4を押し込むことにより、それら曲線管4,4′を地中に向けて押し込むことができるようになっている。   As shown in FIG. 1, the propulsion device 1 according to the present embodiment abuts on a frame 3 installed on a floor girder 2 in a tunnel (not shown) and a rear surface of the curved pipe 4 to be pushed in. A push plate 5, a pair of propulsion jacks 6 for imparting propulsive force to the push plate 5, and guide means 7 for guiding the curved tube 4 are provided. In this propulsion device 1, the curved tube (following curved tube) 4 to be pushed from now on is brought into contact with the rear end of the curved tube (preceding curved tube) 4 'that has been pushed in first, and both curved tubes 4, 4 'is welded and the trailing curved pipe 4 is pushed by the push plate 5 which has received the propulsive force from the propulsion jack 6 so that the curved pipes 4, 4' can be pushed toward the ground. It has become.

前記架台3は、当該架台3の基部を形成するベース架台3aと、曲線管4の略推進方向(図1中記号Tで示される矢印方向)に平行するように前記ベース架台3aに対して斜設され、当該架台3の傾斜部を形成する傾斜架台3bとを備えてなるものである。前記傾斜架台3bの上面部には、曲線管4の曲率と略同じ曲率をもって曲線管4の推進方向に沿って延びる一対のガイドレール8が横方向(図1の紙面を貫く方向)に所定の間隔を存して配設されている。なお、この架台3においては、傾斜架台3bがベース架台3aにピン9によって傾倒可能に連結されるとともに、ベース架台3aと傾斜架台3bとの間にジャッキ10が配され、このジャッキ10の伸縮によってベース架台3aに対する傾斜架台3bの傾斜角度が調整されるようになっている。   The gantry 3 is inclined with respect to the base gantry 3a so as to be parallel to the base gantry 3a forming the base of the gantry 3 and the substantially pushing direction of the curved tube 4 (the arrow direction indicated by the symbol T in FIG. 1). And an inclined gantry 3 b that forms an inclined portion of the gantry 3. A pair of guide rails 8 extending along the propulsion direction of the curved tube 4 with a curvature substantially the same as the curvature of the curved tube 4 is provided on the upper surface of the inclined gantry 3b in a lateral direction (a direction penetrating the paper surface of FIG. 1). They are arranged at intervals. In this gantry 3, the inclined gantry 3 b is connected to the base gantry 3 a by a pin 9 so as to be tiltable, and a jack 10 is arranged between the base gantry 3 a and the inclined gantry 3 b, and the jack 10 is expanded and contracted. The inclination angle of the inclined gantry 3b with respect to the base gantry 3a is adjusted.

前記推進ジャッキ6は、ピストンロッドの中心線に対してシリンダチューブの両側に直角に延びた一対の枢軸で支えるトラニオン形式の支持部がシリンダチューブのヘッド側およびボトム側にそれぞれ設けられた油圧シリンダよりなるものであって、シリンダチューブのヘッド側に設けられたトラニオン形式の支持部(以下、「ヘッド側支持部」という。)における一対の枢軸11もしくはシリンダチューブのボトム側に設けられたトラニオン形式の支持部(以下、「ボトム側支持部」という。)における一対の枢軸11′を中心に揺動できるようにされている。この推進ジャッキ6においては、ピストンロッドの先端部がピン12を介して傾斜架台3bの頂部に連結されるとともに、ヘッド側支持部もしくはボトム側支持部における一対の枢軸11/11′が後述する推進ジャッキ受支部材19を介して押し板5に受け止められるようになっている。そして、この推進ジャッキ6の伸長作動により、その推進力がヘッド側支持部もしくはボトム側支持部における一対の枢軸11/11′から推進ジャッキ受支部材19を介して押し板5に伝達される。   The propulsion jack 6 includes a trunnion-type support portion supported by a pair of pivots extending at right angles to both sides of the cylinder tube with respect to the center line of the piston rod. A trunnion-type support portion (hereinafter referred to as “head-side support portion”) provided on the head side of the cylinder tube, or a trunnion-type support portion provided on the bottom side of the cylinder tube. The support portion (hereinafter referred to as “bottom side support portion”) can swing about a pair of pivots 11 ′. In this propulsion jack 6, the tip end portion of the piston rod is connected to the top portion of the inclined gantry 3b via a pin 12, and a pair of pivots 11/11 'in the head side support portion or the bottom side support portion is propulsion described later. The push plate 5 can be received by the jack receiving member 19. Then, by the extension operation of the propulsion jack 6, the propulsive force is transmitted to the push plate 5 through the propulsion jack support member 19 from the pair of pivots 11/11 'in the head side support portion or the bottom side support portion.

前記押し板5は、図2に示されるように、横方向に長い略矩形状の平板体からなる押し板本体5aと、この押し板本体5aの前面側の中央部に突設され、前記傾斜架台3b上に配された曲線管4の後端部に嵌合する略リング状部材よりなる嵌合部5bとを備えてなるものである。前記押し板本体5aにおいて、その両側部には、前記一対の推進ジャッキ6を通すために、推進ジャッキ6の本体部分が通過可能な丸孔部と推進ジャッキ6のヘッド側支持部もしくはボトム側支持部における一対の枢軸11/11′が通過可能な切欠き部とよりなる推進ジャッキ挿通孔13が穿設されている。また、この押し板本体5aにおいて、前記一対の推進ジャッキ挿通孔13の中間位置には、押し板5の背後から曲線管4の内部へのアプローチを可能とするための孔14が穿設されている。ここで、前記押し板本体5aには、前記ガイドレール8の上面、下面および外側面にそれぞれ接触して転動するローラ15,16,17が所要のブラケットを介して取り付けられている。こうして、押し板5が傾斜架台3bに沿って移動可能とされている。また、前記押し板本体5aの両外側面には上下方向に進退自在なロックピン18aを具備してなるロック機構18が付設されるとともに、前記傾斜架台3bには前記ロックピン18aが挿通可能な所要のロックピン挿通孔を有する傾斜補助架台3cが並設されており、ロックピン18aを下方に突出させてそのロックピン18aを傾斜補助架台3cにおけるロックピン挿通孔に係合させた際には押し板5が傾斜補助架台3cに掛け止められて傾斜架台3b上を移動できないように固定される一方、下方に突出させたロックピン18aを引っ込めて傾斜補助架台3cにおけるロックピン挿通孔との係合関係を解除した際には押し板5が傾斜架台3b上を移動可能な状態となるようにされている。   As shown in FIG. 2, the push plate 5 protrudes from a push plate main body 5a formed of a substantially rectangular flat plate that is long in the lateral direction, and a central portion on the front side of the push plate main body 5a. And a fitting portion 5b made of a substantially ring-shaped member that is fitted to the rear end portion of the curved tube 4 arranged on the gantry 3b. In the push plate main body 5a, a round hole portion through which the main body portion of the propulsion jack 6 can pass and a head side support portion or a bottom side support portion of the propulsion jack 6 so as to pass the pair of propulsion jacks 6 through both sides thereof. A propulsion jack insertion hole 13 formed with a notch through which a pair of pivots 11/11 'can pass is formed. Further, in this push plate main body 5a, a hole 14 for allowing an approach from behind the push plate 5 to the inside of the curved tube 4 is formed at an intermediate position between the pair of propulsion jack insertion holes 13. Yes. Here, rollers 15, 16, and 17 are attached to the push plate main body 5a through required brackets, which roll in contact with the upper surface, the lower surface, and the outer surface of the guide rail 8, respectively. Thus, the push plate 5 can be moved along the inclined gantry 3b. A lock mechanism 18 having a lock pin 18a that can be moved back and forth in the vertical direction is attached to both outer side surfaces of the push plate body 5a, and the lock pin 18a can be inserted into the inclined gantry 3b. When the tilt auxiliary rack 3c having a required lock pin insertion hole is arranged in parallel, when the lock pin 18a is protruded downward and the lock pin 18a is engaged with the lock pin insertion hole of the tilt auxiliary rack 3c, While the push plate 5 is fixed to the inclined auxiliary frame 3c so as not to move on the inclined auxiliary frame 3b, the lock pin 18a protruded downward is retracted to engage the lock pin insertion hole in the inclined auxiliary frame 3c. When the joint relationship is released, the push plate 5 is configured to be movable on the inclined gantry 3b.

前記押し板本体5aの後面側には、図3に示されるように、推進ジャッキ6を受け止めて支持する推進ジャッキ受支部材19が設けられている。この推進ジャッキ受支部材19は、前記推進ジャッキ挿通孔13における丸孔部と略同じ口径の丸孔部および同推進ジャッキ挿通孔13における切欠き部と略同じ形状の切欠き部がそれぞれ連続するように形成され、操作レバー20の回動操作にて回動されるリング状部材19aと、このリング状部材19aから突設され、推進ジャッキ6のヘッド側支持部もしくはボトム側支持部における枢軸11/11′に係合する半円状の切欠き部を有するシリンダサポート19bとよりなるものである。この推進ジャッキ受支部材19において、操作レバー20の図3中記号Dにて示される矢印方向の回動操作により、リング状部材19aにおける切欠き部の位置を推進ジャッキ挿通孔13における切欠き部の位置に一致させる状態位置と、リング状部材19aから突設されるシリンダサポート19bの位置を推進ジャッキ挿通孔13における切欠き部の位置に一致させる状態位置とが切り替えられるようになっている。ここで、推進ジャッキ挿通孔13の切欠き部の位置に対してリング状部材19aの切欠き部の位置が一致されたときには、推進ジャッキ6のボトム側支持部が推進ジャッキ挿通孔13を通して押し板5を通過可能な状態位置となる。以下、この状態位置を「ジャッキ通過可能状態位置」と称する。一方、推進ジャッキ挿通孔13の切欠き部の位置に対してリング状部材19aから突設されるシリンダサポート19bの位置が一致されたときには、推進ジャッキ6のヘッド側支持部もしくはボトム側支持部における枢軸11/11′がシリンダサポート19bに係合可能な状態となり、推進ジャッキ6の推進力が押し板5に伝達可能な状態位置となる。以下、この状態位置を「ジャッキ推進力伝達可能状態位置」と称する。なお、押し板5に対する推進ジャッキ6のヘッド側支持部とボトム側支持部との係合関係を変更するとき、並びに後述する押し板5の引戻し動作のとき以外は、前記シリンダサポート19bにそのシリンダサポート19bと対の関係を成すシリンダサポートキャップ21がボルトによって締着される(図4参照)。なお、図3中符号22にて示されるのは、推進ジャッキ6の本体部分を案内するローラ等よりなるガイド手段である。   As shown in FIG. 3, a propulsion jack support member 19 that receives and supports the propulsion jack 6 is provided on the rear surface side of the push plate body 5a. The propulsion jack receiving member 19 has a round hole portion having substantially the same diameter as the round hole portion in the propulsion jack insertion hole 13 and a notch portion having substantially the same shape as the notch portion in the propulsion jack insertion hole 13. The ring-shaped member 19a that is formed as described above and rotated by the rotation operation of the operation lever 20, and the pivot 11 in the head-side support portion or the bottom-side support portion of the propulsion jack 6 that protrudes from the ring-shaped member 19a. / 11 'and a cylinder support 19b having a semicircular cutout portion engaged therewith. In this propulsion jack receiving member 19, the position of the notch portion in the ring-shaped member 19a is changed to the notch portion in the propulsion jack insertion hole 13 by rotating the operation lever 20 in the direction of the arrow indicated by the symbol D in FIG. And a state position where the position of the cylinder support 19b projecting from the ring-shaped member 19a is made to coincide with the position of the notch in the propulsion jack insertion hole 13. Here, when the position of the notch portion of the ring-shaped member 19 a matches the position of the notch portion of the propulsion jack insertion hole 13, the bottom side support portion of the propulsion jack 6 passes through the propulsion jack insertion hole 13 and pushes the plate. 5 is a state position that can pass through. Hereinafter, this state position is referred to as a “jack passable state position”. On the other hand, when the position of the cylinder support 19b protruding from the ring-shaped member 19a matches the position of the notch portion of the propulsion jack insertion hole 13, the head side support portion or the bottom side support portion of the propulsion jack 6 The pivot 11/11 'can be engaged with the cylinder support 19b, and the propulsion force of the propulsion jack 6 can be transmitted to the push plate 5. Hereinafter, this state position is referred to as a “jack propulsion force transmission enabled state position”. It should be noted that the cylinder support 19b is provided with the cylinder except when the engagement relationship between the head side support portion and the bottom side support portion of the propulsion jack 6 with respect to the push plate 5 is changed and when the push plate 5 is retracted as described later. The cylinder support cap 21 that forms a pair with the support 19b is fastened with bolts (see FIG. 4). In addition, what is shown by the code | symbol 22 in FIG. 3 is the guide means which consists of a roller etc. which guide the main-body part of the propulsion jack 6. FIG.

本実施形態においては、曲線管4の埋設作業時に、押し板5を図1中記号Aで示される最高位置から同図中記号Bで示される中間位置を経て同図中記号Cで示される最低位置にまで押し出す押出し動作と、押し板5を最低位置Cから中間位置Bを経て最高位置Aにまで引き戻す引戻し動作とが行われる。ここで、前記押出し動作は次のようにして行われる。まず、最高位置Aにおいて推進ジャッキ6のヘッド側支持部における枢軸11を押し板5に支持させた状態で推進ジャッキ6を1ストローク分伸長させて押し板5を中間位置Bにまで移動させる。この中間位置Bにおいて、ロック機構18を作動させて押し板5を傾斜補助架台3cに固定する。次いで、シリンダサポートキャップ21(図4参照)を取り外すとともに、操作レバー20の操作にて推進ジャッキ受支部材19(図3参照)をジャッキ通過可能状態位置とし、推進ジャッキ6を全縮状態となるまで収縮させる。このときボトム側支持部が推進ジャッキ挿通孔13(図2参照)を介して押し板5を通過される。次いで、操作レバー20の操作にて推進ジャッキ受支部材19(図3参照)をジャッキ推進力伝達可能状態位置とし、推進ジャッキ6のボトム側支持部の枢軸11′をシリンダサポート19b(図3参照)に係合させるとともにシリンダサポートキャップ21をシリンダサポート19bに締着してそのボトム側支持部を押し板5に支持させる。そして、ロック機構18のロックを解除して後に、推進ジャッキ6を1ストローク分伸長させて押し板5を最低位置Cにまで移動させる。一方、前記引戻し動作は次のようにして行われる。まず、最低位置Cにおいて、シリンダサポートキャップ21を取り外すとともに、推進ジャッキ6を押し板5に図示省略されるロック手段にて固定する。そして、推進ジャッキ6を全縮となるまで収縮させて押し板5を中間位置Bにまで移動させる。この中間位置Bにおいて、ロック機構18を作動させて押し板5を傾斜補助架台3cに固定する。次いで、操作レバー20の操作にて推進ジャッキ受支部材19をジャッキ通過可能状態位置にするとともに、前記ロック手段によるロックを解除して押し板5に対し推進ジャッキ6をフリーな状態とした後に、推進ジャッキ6を1ストローク分伸長させる。このときボトム側支持部が推進ジャッキ挿通孔13を介して押し板5を通過される。次いで、再度、推進ジャッキ6を押し板5に図示省略されるロック手段にて固定する。そして、ロック機構18のロックを解除して後に、推進ジャッキ6を全縮となるまで収縮させて押し板5を最高位置Aにまで移動させる。   In the present embodiment, during the embedding operation of the curved tube 4, the push plate 5 is moved from the highest position indicated by the symbol A in FIG. 1 to the intermediate position indicated by the symbol B in FIG. An extruding operation for pushing out to the position and a pulling back operation for pulling the push plate 5 back from the lowest position C to the highest position A through the intermediate position B are performed. Here, the extrusion operation is performed as follows. First, in a state where the pivot 11 at the head side support portion of the propulsion jack 6 is supported by the push plate 5 at the highest position A, the push jack 5 is extended by one stroke and the push plate 5 is moved to the intermediate position B. At this intermediate position B, the lock mechanism 18 is operated to fix the push plate 5 to the tilt assist base 3c. Next, the cylinder support cap 21 (see FIG. 4) is removed, and the operation lever 20 is operated to bring the propulsion jack receiving / supporting member 19 (see FIG. 3) into a jack-passable state, so that the propulsion jack 6 is fully contracted. Shrink to At this time, the bottom side support portion is passed through the push plate 5 through the propulsion jack insertion hole 13 (see FIG. 2). Next, by operating the operation lever 20, the propulsion jack receiving member 19 (see FIG. 3) is brought into the jack propulsive force transmission enabled position, and the pivot 11 'of the bottom support portion of the propulsion jack 6 is set to the cylinder support 19b (see FIG. 3). And the cylinder support cap 21 is fastened to the cylinder support 19b and the bottom side support portion is supported by the push plate 5. Then, after unlocking the lock mechanism 18, the propulsion jack 6 is extended by one stroke to move the push plate 5 to the lowest position C. On the other hand, the pull back operation is performed as follows. First, at the lowest position C, the cylinder support cap 21 is removed and the propulsion jack 6 is fixed to the push plate 5 by a locking means (not shown). Then, the propulsion jack 6 is contracted to full contraction and the push plate 5 is moved to the intermediate position B. At this intermediate position B, the lock mechanism 18 is operated to fix the push plate 5 to the tilt assist base 3c. Next, the operation of the operation lever 20 brings the propulsion jack support member 19 into a jack-passable state position, and after releasing the lock by the locking means to make the propulsion jack 6 free with respect to the push plate 5, The propulsion jack 6 is extended by one stroke. At this time, the bottom side support portion is passed through the push plate 5 through the propulsion jack insertion hole 13. Next, the propulsion jack 6 is again fixed to the push plate 5 by a locking means (not shown). Then, after unlocking the lock mechanism 18, the propulsion jack 6 is contracted to full contraction, and the push plate 5 is moved to the highest position A.

前記嵌合部5bには、図2、図4および図5に示されるように、当該嵌合部5bに嵌め込まれた曲線管4と押し板5とを連結する連結手段23が対向配置で付設されている。この連結手段23は、図5に示されるように、嵌合部5bに嵌め込まれた曲線管4を挟み込むように嵌合部5bに固着される一対の板状部材よりなるブラケット24と、このブラケット24に穿設された孔および嵌合部5bに嵌め込まれた曲線管4に予め穿設されている孔にそれぞれ挿通されそのブラケット24と曲線管4とを連結する連結ピン25とを備えて構成されている。この連結手段23は、嵌合部5bに嵌め込まれた曲線管4の落下を防止する役目や、曲線管4を押し板5にて引き戻す際の連結器としての役目、掘進時のローリングを規制する役目などがある。   As shown in FIGS. 2, 4 and 5, the fitting portion 5b is provided with connecting means 23 for connecting the curved tube 4 fitted to the fitting portion 5b and the push plate 5 in an opposing arrangement. Has been. As shown in FIG. 5, the connecting means 23 includes a bracket 24 made of a pair of plate-like members fixed to the fitting portion 5b so as to sandwich the curved tube 4 fitted into the fitting portion 5b, and the bracket. 24, and a connecting pin 25 that is inserted through a hole previously drilled in the curved tube 4 fitted in the fitting portion 5b and that connects the bracket 24 and the curved tube 4 to each other. Has been. The connecting means 23 serves to prevent the curved tube 4 fitted in the fitting portion 5b from dropping, to serve as a connector when the curved tube 4 is pulled back by the push plate 5, and to restrict rolling during digging. There are roles.

本実施形態の推進装置1は、更に、図1に示されるように、曲線管4の後端部の中心と押し板5の嵌合部5bの中心とを合わせるセンタリング機構30と、曲線管4の周方向位置を調整する管周方向位置調整機構31と、曲線管4を仮受けするとともに曲線管4の縦方向位置を調整する管縦方向位置調整機構32とを備えている。   As shown in FIG. 1, the propulsion device 1 of the present embodiment further includes a centering mechanism 30 that aligns the center of the rear end portion of the curved tube 4 and the center of the fitting portion 5 b of the push plate 5, and the curved tube 4. A pipe circumferential position adjusting mechanism 31 for adjusting the circumferential position of the curved pipe 4 and a pipe vertical position adjusting mechanism 32 for temporarily receiving the curved pipe 4 and adjusting the vertical position of the curved pipe 4.

前記センタリング機構30は、図2および図4に示されるように、曲線管4の径方向の位置を調整する管径方向位置調整機構33が4個組み合わされて構成されている。これら4個の管径方向位置調整機構33は、嵌合部5bの中心(図2中記号Oで示される点)に対して点対称でかつ嵌合部5bの中心線(図2中記号Sで示される一点鎖線)に対して線対称の関係となるように、嵌合部5bの周囲に適宜間隔を存して配置されている。なお、管径方向位置調整機構33の設置数としては、3個以上であればよい。 As shown in FIGS. 2 and 4, the centering mechanism 30 is configured by combining four pipe radial position adjusting mechanisms 33 that adjust the radial position of the curved pipe 4. These four pipe diameter direction position adjusting mechanism 33, the center (point indicated in Figure 2 the symbol O 1) with respect to point symmetry a and the center line of the fitting portion 5b of the fitting portion 5b (in Figure 2 the symbol Are arranged at appropriate intervals around the fitting portion 5b so as to have a line-symmetrical relationship with respect to the one-dot chain line indicated by S). It should be noted that the number of tube diameter direction position adjusting mechanisms 33 may be three or more.

前記管径方向位置調整機構33は、図6に示されるように、押し板本体5aおよび嵌合部5bに跨って固設されるブラケット34に中央部がピン35によって支持されて嵌合部5bの径方向に揺動可能な略ブーメラン形状のアーム36と、このアーム36の一端部に回転可能に取着され、曲線管4の嵌合部5bへの抜き差し方向に転動するローラ37と、前記アーム36の他端部にピン38を介して連結されるロッド39と、押し板本体5aから突設され、前記ロッド39が掛け止められるブラケット40と、前記ロッド39のねじ部に螺合するナット41と、このナット41と前記ブラケット40との間に介挿される球面座金42とを備え、ナット41の締め付けによってアーム36が図6中記号Eで示される矢印方向に回動されてローラ37が嵌合部5bの中心Oに向けて押し込まれるように構成されている。 As shown in FIG. 6, the tube diameter direction position adjusting mechanism 33 has a central portion supported by a pin 35 and fixed to a bracket 34 straddling the push plate body 5a and the fitting portion 5b, and the fitting portion 5b. A substantially boomerang-shaped arm 36 that can swing in the radial direction, and a roller 37 that is rotatably attached to one end of the arm 36 and that rolls in the direction of inserting and removing the fitting portion 5b of the curved tube 4. A rod 39 connected to the other end of the arm 36 via a pin 38, a bracket 40 protruding from the push plate main body 5a and hooked to the rod 39, and a threaded portion of the rod 39 are screwed together. A nut 41 and a spherical washer 42 interposed between the nut 41 and the bracket 40 are provided. By tightening the nut 41, the arm 36 is rotated in the direction indicated by the arrow E in FIG. 7 is configured to be pushed toward the center O 1 of the fitting portion 5b.

今、例えば、曲線管4の後端部に押し板5の嵌合部5bを嵌め込もうとした際に、嵌合部5bの中心Oと曲線管4の中心Oとが図7(a)に示されるように径方向に距離dだけ離れていた場合において、管径方向位置調整機構33による管径方向位置調整動作は次のようにして行われる。まず、ローラ37が曲線管4の後端部の外周面に接触される同図(b)に示されるような状態となるまでナット41を締め付けていき、更にナット41を締め付けることによってローラ37を嵌合部5bの中心に向けて押し込むことにより、曲線管4の中心Oを嵌合部5bの中心Oへと近づけていく。そして、同図(c)に示されるように曲線管4の中心Oが嵌合部5bの中心Oと一致したらナット41の締め付けを止める。 Now, for example, when an attempt Hamekomo the fitting portion 5b of the push plate 5 to the rear end portion of the curved tube 4, the center O 2 Togazu 7 of the center O 1 and the curve pipe 4 of the fitting portion 5b ( As shown in a), when the distance d is separated in the radial direction, the pipe radial position adjusting operation by the pipe radial position adjusting mechanism 33 is performed as follows. First, the nut 37 is tightened until the roller 37 comes into contact with the outer peripheral surface of the rear end portion of the curved tube 4 as shown in FIG. by pushing toward the center of the fitting portion 5b, it moved toward the center O 2 of the curve pipe 4 to the center O 1 of the fitting portion 5b. Then, when the center O 2 of the curved tube 4 coincides with the center O 1 of the fitting portion 5b as shown in FIG.

本実施形態においては、嵌合部5bの周囲に配置された4個の管径方向位置調整機構33の協働によって、曲線管4の後端部の中心Oが押し板5の嵌合部5bの中心Oに一致される。この中心合わせの完了後においては、速やかに押し板5を前進させて嵌合部5bを曲線管4の後端部に嵌め合わせる。本実施形態では、管径方向位置調整機構33の曲線管4への押し当て部材としてローラ37が採用されているので、曲線管4の後端部と押し板5の嵌合部5bとの中心合わせの状態を維持したまま押し板5をスムーズに前進させることができる。 In the present embodiment, the center O 2 of the rear end portion of the curved pipe 4 is fitted to the fitting portion of the push plate 5 by the cooperation of the four pipe radial direction position adjusting mechanisms 33 arranged around the fitting portion 5b. It is coincident with the center O 1 of 5b. After completion of the centering, the push plate 5 is rapidly advanced to fit the fitting portion 5b to the rear end portion of the curved tube 4. In the present embodiment, since the roller 37 is employed as a pressing member to the curved pipe 4 of the pipe radial position adjusting mechanism 33, the center between the rear end portion of the curved pipe 4 and the fitting portion 5b of the pressing plate 5 is used. The push plate 5 can be smoothly advanced while maintaining the alignment state.

次に、曲線管4の周方向位置を調整する管周方向位置調整機構31について説明する。この管周方向位置調整機構31は、図2および図4に示されるように、前記管径方向位置調整機構33と干渉しないように嵌合部5bの周囲に対向配置されて曲線管4に対し接線方向の押し力を付与する一対の管接線方向押力発生機構43を備えて構成されている。この管周方向位置調整機構31においては、前記一対の管接線方向押力発生機構43によって曲線管4に偶力を作用させることにより、その曲線管4の周方向位置を調整するようにされている。前記管接線方向押力発生機構43は、図8に示されるように、嵌合部5bの外周面に固着され、曲線管4の後端部の外周面に予め突設された突起部4aを受け入れる切欠き部を有してなる略Uの字形状のブラケット44と、前記突起部4aを挟むように対向配置で前記ブラケット44に螺合される第1の押しボルト45および第2の押しボルト46とを備え、ブラケット44に反力をとった第1の押しボルト45もしくは第2の押しボルト46の締め付けによって曲線管4に対し接線方向の押し力を双方向に作用させることができるようになっている。   Next, the pipe circumferential direction position adjusting mechanism 31 that adjusts the circumferential position of the curved pipe 4 will be described. As shown in FIGS. 2 and 4, the pipe circumferential direction position adjusting mechanism 31 is disposed so as to be opposed to the periphery of the fitting portion 5 b so as not to interfere with the pipe radial direction position adjusting mechanism 33. A pair of tube tangential direction pressing force generating mechanisms 43 that apply a tangential direction pressing force are provided. In this pipe circumferential direction position adjusting mechanism 31, a couple of forces is applied to the curved pipe 4 by the pair of pipe tangential direction pressing force generating mechanisms 43, thereby adjusting the circumferential position of the curved pipe 4. Yes. As shown in FIG. 8, the tube tangential direction pressing force generating mechanism 43 is fixed to the outer peripheral surface of the fitting portion 5 b, and has a protrusion 4 a protruding in advance on the outer peripheral surface of the rear end portion of the curved tube 4. A substantially U-shaped bracket 44 having a notch for receiving, and a first push bolt 45 and a second push bolt which are screwed to the bracket 44 in an opposing arrangement so as to sandwich the protrusion 4a. 46, so that a tangential pushing force can be applied to the curved tube 4 in both directions by tightening the first pushing bolt 45 or the second pushing bolt 46 which takes a reaction force on the bracket 44. It has become.

今、例えば、先行曲線管4′の周方向の基準位置を示すけがき線(このけがき線は予め先行曲線管4′に付されている。後行曲線管4についても同様。)が図9中記号Fで示される位置にあるのに対して、後行曲線管4の周方向の基準位置を示すけがき線が同図中記号Gで示される位置にある場合において、管周方向位置調整機構31による管周方向位置調整動作は次のようにして行われる。まず、一対の管接線方向押力発生機構43における第1の押しボルト45を締め付けることにより、図9中一点鎖線矢印で示される偶力を後行曲線管4に作用させ、後行曲線管4に付されたけがき線を先行曲線管4′に付されたけがき線へと近づけていく。そして、後行曲線管4のけがき線が先行曲線管4′のけがき線と一致したら第1の押しボルト45の締め付けを止める。また、例えば、先行曲線管4′に付されたけがき線が先の例と同じ位置(F)にあるのに対して、後行曲線管4に付されたけがき線が図9中記号Hで示される位置にある場合において、管周方向位置調整機構31による管周方向位置調整動作は次のようにして行われる。まず、一対の管接線方向押力発生機構43における第2の押しボルト46を締め付けることにより、図9中破線矢印で示される偶力を後行曲線管4に作用させ、後行曲線管4に付されたけがき線を先行曲線管4′に付されたけがき線へと近づけていく。そして、後行曲線管4のけがき線が先行曲線管4′のけがき線と一致したら第2の押しボルト46の締め付けを止める。   Now, for example, a marking line indicating the reference position in the circumferential direction of the preceding curve tube 4 '(this marking line is attached to the preceding curve tube 4' in advance. The same applies to the trailing curve tube 4). 9 in which the marking line indicating the reference position in the circumferential direction of the trailing curved tube 4 is at the position indicated by the symbol G in FIG. The pipe circumferential position adjustment operation by the adjustment mechanism 31 is performed as follows. First, by tightening the first push bolt 45 in the pair of pipe tangential direction pressing force generating mechanisms 43, the couple shown by the one-dot chain line arrow in FIG. The marking line attached to is brought closer to the marking line attached to the preceding curve tube 4 '. Then, when the marking line of the trailing curve tube 4 coincides with the marking line of the preceding curve tube 4 ', the tightening of the first push bolt 45 is stopped. Further, for example, the marking line attached to the preceding curve tube 4 'is at the same position (F) as in the previous example, whereas the marking line attached to the succeeding curve tube 4 is indicated by the symbol H in FIG. In the case of the position shown, the pipe circumferential position adjustment operation by the pipe circumferential position adjustment mechanism 31 is performed as follows. First, by tightening the second push bolt 46 in the pair of tube tangential direction pressing force generating mechanisms 43, the couple shown by the broken line arrow in FIG. The marked line is moved closer to the marked line attached to the preceding curve tube 4 '. Then, when the marking line of the trailing curve tube 4 coincides with the marking line of the preceding curve tube 4 ', the tightening of the second push bolt 46 is stopped.

次に、曲線管4を仮受けするとともに曲線管4の縦方向位置を調整する管縦方向位置調整機構32について説明する。この管縦方向位置調整機構32は、傾斜架台3bの略中央部に取着されており(図1参照)、図1におけるX−X矢視図が示された図10に表わされるように、曲線管4の下側面に接触してその曲線管4の軸線方向の動きに合わせて転動するローラ47と、このローラ47を支持するローラ支持部材48と、このローラ支持部材48に連結されそのローラ支持部材48を曲線管4の縦方向に進退自在に案内する一対のリニアガイド49と、この一対のリニアガイド49の間に配されて前記ローラ支持部材48に推進力を付与するジャッキ50とを備え、曲線管4の軸線方向の動きをローラ47によって案内しつつその曲線管4を下側から支持するとともに、ジャッキ50の伸縮操作によって曲線管4の縦方向の位置を調整するように構成されている。なお、この管縦方向位置調整機構32においては、ジャッキ50を全縮させることにより、押し板5が傾斜架台3bに沿って移動して当該管縦方向位置調整機構32上を通過する際の押し板5との干渉を避けることができるようにされている。   Next, the pipe vertical position adjusting mechanism 32 that temporarily receives the curved pipe 4 and adjusts the vertical position of the curved pipe 4 will be described. This pipe longitudinal direction position adjusting mechanism 32 is attached to a substantially central portion of the inclined gantry 3b (see FIG. 1), and as shown in FIG. 10 which is an XX arrow view in FIG. A roller 47 that contacts the lower surface of the curved tube 4 and rolls in accordance with the axial movement of the curved tube 4, a roller support member 48 that supports the roller 47, and is connected to the roller support member 48. A pair of linear guides 49 that guide the roller support member 48 in a longitudinal direction of the curved tube 4 and a jack 50 that is disposed between the pair of linear guides 49 and applies a propulsive force to the roller support member 48; And supporting the curved tube 4 from below while guiding the movement of the curved tube 4 in the axial direction by a roller 47, and adjusting the vertical position of the curved tube 4 by the expansion and contraction operation of the jack 50. Is There. In the pipe vertical position adjusting mechanism 32, the push plate 5 moves along the inclined gantry 3b and is pushed when passing over the pipe vertical position adjusting mechanism 32 by fully contracting the jack 50. Interference with the plate 5 can be avoided.

以上に述べたように構成される推進装置による曲線管の1サイクルの埋設作業について、主に図11乃至図13を用い、また図2、図3、図5、図7および図9を適宜参照して以下に説明することとする。   11 to 13 are mainly used for embedding one cycle of the curved pipe by the propulsion device configured as described above, and also refer to FIGS. 2, 3, 5, 7, and 9 as appropriate. And will be described below.

本実施形態において、推進装置1による曲線管の1サイクルの埋設作業は、推進ジャッキ6のヘッド側支持部を押し板5に支持させてその推進ジャッキ6を全縮とすることにより押し板5を最高位置に位置させ、かつその最高位置において押し板5をロック機構18により固定した状態を初期状態として開始される。この初期状態において、これから押し込もうとする曲線管(後行曲線管)4を、図11(a)に示されるように、クレーン51を用いて押し板5と先に押し込まれた曲線管(先行曲線管)4′との間の傾斜架台3b上に推進方向に沿うように斜めに傾けた状態で持ち込む。この傾斜架台3b上に持ち込まれた後行曲線管4を、図11(b)に示されるように、クレーン51によって推進方向とは逆方向に引き上げることによりその後行曲線管4を押し板5の嵌合部5bに嵌め込み、その後、連結手段23により押し板5と後行曲線管4とを連結する。この連結作業の完了後、後行曲線管4内に予め組み込まれた排土装置等の付帯機器(図示省略)を先行曲線管4′内の付帯機器(図示省略)と接続する。次いで、図11(c)に示されるように、管縦方向位置調整機構32におけるジャッキ50の伸長操作にてローラ47を後行曲線管4の下側面に接触させてその後行曲線管4を仮受けするとともに、ロック機構18のロックを解除し、その後、後行曲線管4の先端を先行曲線管4′の後端へと近づけるように、後行曲線管4の吊り位置をクレーン操作により調整する動作と推進ジャッキ6の伸長動作とを並行して行う。こうして、後行曲線管4の先端を先行曲線管4′の後端へと近づけていき、後行曲線管4の先端を先行曲線管4′の後端に突き合わせた際に、先行曲線管4′に対して後行曲線管4の周方向の位置が微妙にずれていたり、先行曲線管4′に対して後行曲線管4の縦方向の位置が微妙にずれていたりする場合がある。先行曲線管4′に対して後行曲線管4の周方向位置がずれていた場合には、この周方向位置のずれをなくすように後行曲線管4の周方向位置を管周方向位置調整機構31を用いて調整する。すなわち、図9に示されるように、第1の押しボルト45もしくは第2の押しボルト46を締め付けることにより、後行曲線管4に図中一点鎖線矢印で示される偶力もしくは図中破線矢印で示される偶力を作用させ、後行曲線管4のけがき線を先行曲線管4′のけがき線に一致させる。一方、先行曲線管4′に対して後行曲線管4の縦方向位置がずれていた場合には、この縦方向位置のずれをなくすように後行曲線管4の縦方向位置を管縦方向位置調整機構32を用いて調整する。すなわち、管縦方向位置調整機構32におけるジャッキ50の伸縮操作により、後行曲線管4の縦方向位置を先行曲線管4′の縦方向位置に合わせるように調整する。こうして、先行曲線管4′に対する後行曲線管4の位置調整作業が完了したら、先行曲線管4′と後行曲線管4とを溶接にて接合する。   In this embodiment, the embedding operation for one cycle of the curved tube by the propulsion device 1 is performed by supporting the head-side support portion of the propulsion jack 6 on the push plate 5 and making the propulsion jack 6 fully contracted. A state in which the push plate 5 is fixed at the highest position and fixed at the highest position by the lock mechanism 18 is started as an initial state. In this initial state, the curved pipe (following curved pipe) 4 to be pushed in, as shown in FIG. It is brought in a state of being inclined obliquely along the propulsion direction on the inclined gantry 3b between the preceding curved tube 4 '. As shown in FIG. 11 (b), the trailing curve tube 4 brought on the inclined mount 3 b is pulled up in the direction opposite to the propulsion direction by the crane 51, thereby pushing the trailing curve tube 4 of the push plate 5. It fits in the fitting part 5b, and the push plate 5 and the following curve pipe | tube 4 are connected by the connection means 23 after that. After the completion of the connecting operation, an accessory device (not shown) such as a soil removal device incorporated in advance in the trailing curve tube 4 is connected to an accessory device (not shown) in the preceding curve tube 4 '. Next, as shown in FIG. 11C, the roller 47 is brought into contact with the lower surface of the trailing curve tube 4 by the extension operation of the jack 50 in the tube vertical position adjusting mechanism 32, and the trailing curve tube 4 is temporarily moved. The lock mechanism 18 is unlocked, and then the suspension position of the trailing curved pipe 4 is adjusted by a crane operation so that the tip of the trailing curved pipe 4 approaches the rear end of the preceding curved pipe 4 '. And the extension operation of the propulsion jack 6 are performed in parallel. In this way, when the leading end of the trailing curve tube 4 is brought close to the trailing end of the leading curve tube 4 'and the leading end of the trailing curve tube 4 is abutted against the trailing end of the leading curve tube 4', the leading curve tube 4 In some cases, the circumferential position of the trailing curve tube 4 is slightly shifted from ′, or the longitudinal position of the trailing curve tube 4 is slightly shifted from the preceding curve tube 4 ′. When the circumferential position of the succeeding curved tube 4 is deviated from the preceding curved tube 4 ', the circumferential position of the succeeding curved tube 4 is adjusted so as to eliminate this circumferential position displacement. Adjustment is performed using mechanism 31. That is, as shown in FIG. 9, by tightening the first push bolt 45 or the second push bolt 46, the trailing curve tube 4 is coupled with a couple indicated by a one-dot chain line arrow in the figure or a broken line arrow in the figure. The couple shown is applied so that the scribing line of the trailing curve tube 4 coincides with the scoring line of the preceding curve tube 4 '. On the other hand, when the longitudinal position of the succeeding curved tube 4 is deviated from the preceding curved tube 4 ', the longitudinal position of the succeeding curved tube 4 is set to the longitudinal direction of the tube so as to eliminate the displacement of the longitudinal direction. The position adjustment mechanism 32 is used for adjustment. That is, the vertical position of the trailing curved pipe 4 is adjusted to the vertical position of the preceding curved pipe 4 ′ by the expansion / contraction operation of the jack 50 in the pipe vertical position adjusting mechanism 32. Thus, when the position adjustment operation of the succeeding curve tube 4 with respect to the preceding curve tube 4 ′ is completed, the preceding curve tube 4 ′ and the following curve tube 4 are joined by welding.

ところで、前述の先行曲線管4′に対する後行曲線管4の位置調整作業の際に、位置調整代が足らない場合がある。このような場合には、後行曲線管4がクレーン51にて確実に吊られていることを確認して後に、連結手段23による押し板5と後行曲線管4との連結を解除し、その後、管縦方向位置調整機構32により後行曲線管4を仮受けしながら推進ジャッキ6を収縮させて押し板5を後行曲線管4から引き離す。そして、主にクレーン操作により、先行曲線管4′に対する後行曲線管4の位置調整を行い、この位置調整作業が完了したら、先行曲線管4′と後行曲線管4とを溶接にて接合する。   By the way, there may be a case where the position adjustment allowance is not sufficient in the position adjustment work of the succeeding curve tube 4 with respect to the preceding curve tube 4 ′. In such a case, after confirming that the trailing curve pipe 4 is reliably suspended by the crane 51, the connection between the push plate 5 and the trailing curve pipe 4 by the connecting means 23 is released, Thereafter, while the trailing curve tube 4 is provisionally received by the tube vertical position adjusting mechanism 32, the propulsion jack 6 is contracted to pull the push plate 5 away from the trailing curve tube 4. Then, the position of the trailing curve pipe 4 is adjusted with respect to the leading curve pipe 4 'mainly by crane operation. When this position adjustment operation is completed, the leading curve pipe 4' and the trailing curve pipe 4 are joined by welding. To do.

ところが、この溶接の際の溶接歪等の影響によって今度は押し板5の嵌合部中心と後行曲線管4の後端部中心とがずれてしまって後行曲線管4の後端部に押し板5の嵌合部5bを嵌め合わせることが極めて困難になる場合がある。このような場合には、センタリング機構30を構成する4個の管径方向位置調整機構33(図2参照)の協働により、後行曲線管4の後端部の中心を押し板5の嵌合部5bの中心に一致させる。すなわち、押し板5の嵌合部中心に対する後行曲線管4の後端部中心のずれを補正するには、後行曲線管4の後端部をある特定の径方向に移動させる必要がある。センタリング機構30を構成する4個の管径方向位置調整機構33のうち、後行曲線管4の後端部を前記特定の径方向に移動させるのに貢献し得るものを1個または2個以上適宜選択し、この選択された管径方向位置調整機構33におけるナット41の締め付け具合を調整することにより(図7(a)〜(c)参照)、後行曲線管4の後端部中心Oを押し板5の嵌合部中心Oに一致させる。この中心合わせの作業の完了後においては、速やかに押し板5を前進させて嵌合部5bを後行曲線管4の後端部に嵌め合わせるとともに、連結手段23により押し板5と後行曲線管4とを連結する。なお、連結手段23により押し板5と後行曲線管4とを連結する際には、図5に示されるように、連結ピン25を、ブラケット24に穿設された孔および嵌合部5bに嵌め込まれた後行曲線管4に予め穿設されている孔にそれぞれ挿通する必要があるが、ブラケット24側の孔の位置に対し、後行曲線管4側の孔の位置が若干ずれてしまって連結ピン25を挿入し難い場合がある。このような場合には、第1の押しボルト45もしくは第2の押しボルト46の操作にて後行曲線管4に図9中一点鎖線矢印で示される偶力もしくは同図中破線矢印で示される偶力を作用させることにより、後行曲線管4側の孔の位置をブラケット24側の孔の位置に合わせるように調整して、連結ピン25を挿入し易い状態にするのがよい。 However, due to the influence of welding distortion or the like during welding, the center of the fitting portion of the push plate 5 and the rear end portion center of the trailing curve tube 4 are shifted from each other, and the rear end portion of the trailing curve tube 4 is displaced. It may be extremely difficult to fit the fitting portion 5b of the push plate 5 together. In such a case, the center of the rear end portion of the trailing curved tube 4 is fitted to the push plate 5 by the cooperation of the four pipe radial direction adjusting mechanisms 33 (see FIG. 2) constituting the centering mechanism 30. It is made to correspond to the center of the joint part 5b. That is, in order to correct the deviation of the center of the trailing end of the trailing curved tube 4 from the center of the fitting portion of the push plate 5, it is necessary to move the trailing end of the trailing curved tube 4 in a certain radial direction. . Of the four pipe radial position adjusting mechanisms 33 constituting the centering mechanism 30, one or more that can contribute to moving the rear end portion of the trailing curved pipe 4 in the specific radial direction. By appropriately selecting and adjusting the tightening degree of the nut 41 in the selected pipe radial direction position adjusting mechanism 33 (see FIGS. 7A to 7C), the rear end center O of the trailing curved pipe 4 is selected. 2 is made to coincide with the fitting portion center O 1 of the push plate 5. After the centering operation is completed, the push plate 5 is rapidly advanced to fit the fitting portion 5b to the rear end portion of the trailing curve tube 4, and the connecting plate 23 and the trailing curve are connected by the connecting means 23. The tube 4 is connected. When connecting the push plate 5 and the trailing curved tube 4 by the connecting means 23, as shown in FIG. 5, the connecting pin 25 is inserted into the hole formed in the bracket 24 and the fitting portion 5b. Although it is necessary to pass through the holes previously drilled in the fitted curved tube 4, the position of the hole on the trailing curved tube 4 side is slightly shifted from the position of the hole on the bracket 24 side. In some cases, it is difficult to insert the connecting pin 25. In such a case, it is indicated by the couple shown by the one-dot chain line arrow in FIG. 9 or the broken line arrow in the figure on the trailing curve pipe 4 by the operation of the first push bolt 45 or the second push bolt 46. It is preferable to adjust the position of the hole on the trailing curved tube 4 side to the position of the hole on the bracket 24 side by applying a couple, so that the connecting pin 25 can be easily inserted.

次いで、先行曲線管4′と後行曲線管4とが溶接にて接合されるとともに、後行曲線管4に押し板5の嵌合部5bが嵌め込まれた状態とされた後において、まず、後行曲線管4に取り付けられているワイヤーロープ等の吊り用具を取り外し、押し板5の通過時の干渉を避けるために管縦方向位置調整機構32におけるジャッキ50を全縮となるまで収縮させる。その後、図12(a)に示されるように、推進ジャッキ6を1ストローク分伸長させて押し板5を中間位置にまで移動させる。次いで、この中間位置において、ロック機構18を作動させて押し板5を傾斜補助架台3cに固定する。その後、シリンダサポートキャップ21を取り外すとともに、操作レバー20の操作にて推進ジャッキ受支部材19(図3参照)をジャッキ通過可能状態位置としてから、推進ジャッキ6を全縮状態となるまで収縮させる。このときボトム側支持部が推進ジャッキ挿通孔13(図2参照)を介して押し板5を通過される。次いで、操作レバー20の操作にて推進ジャッキ受支部材19(図3参照)をジャッキ推進力伝達可能状態位置とし、推進ジャッキ6のボトム側支持部の枢軸11′をシリンダサポート19bに係合させるとともにシリンダサポートキャップ21をシリンダサポート19bに締着して、図12(b)に示されるように、推進ジャッキ6のボトム側支持部を押し板5に支持させる。そして、ロック機構18のロックを解除して後に、図12(c)に示されるように、推進ジャッキ6を1ストローク分伸長させて押し板5を最低位置にまで移動させる。こうして、推進ジャッキ6からの推進力を受けた押し板5にて後行曲線管4を押し込むことにより、後行曲線管4および先行曲線管4′を地中に向けて押し込む。   Next, after the leading curve tube 4 ′ and the trailing curve tube 4 are joined by welding and the fitting portion 5b of the push plate 5 is fitted into the trailing curve tube 4, first, A hanging tool such as a wire rope attached to the trailing curved pipe 4 is removed, and the jack 50 in the pipe vertical position adjusting mechanism 32 is contracted to full contraction in order to avoid interference when the push plate 5 passes. Thereafter, as shown in FIG. 12A, the propulsion jack 6 is extended by one stroke, and the push plate 5 is moved to the intermediate position. Next, at this intermediate position, the lock mechanism 18 is operated to fix the push plate 5 to the tilt auxiliary frame 3c. Thereafter, the cylinder support cap 21 is removed, and the propulsion jack receiving member 19 (see FIG. 3) is moved to the jack-passable state position by the operation of the operation lever 20, and then the propulsion jack 6 is contracted until it is fully contracted. At this time, the bottom side support portion is passed through the push plate 5 through the propulsion jack insertion hole 13 (see FIG. 2). Next, by operating the operation lever 20, the propulsion jack receiving member 19 (see FIG. 3) is brought into the jack propulsive force transmitting state position, and the pivot 11 'of the bottom support portion of the propulsion jack 6 is engaged with the cylinder support 19b. At the same time, the cylinder support cap 21 is fastened to the cylinder support 19b, and the bottom side support portion of the propulsion jack 6 is supported by the push plate 5 as shown in FIG. Then, after unlocking the lock mechanism 18, as shown in FIG. 12C, the propulsion jack 6 is extended by one stroke to move the push plate 5 to the lowest position. Thus, the trailing curve tube 4 and the leading curve tube 4 ′ are pushed toward the ground by pushing the trailing curve tube 4 with the push plate 5 receiving the propulsive force from the propulsion jack 6.

この曲線管の押し込み動作が完了した後において、連結手段23による押し板5と後行曲線管4との連結を解除するとともに、シリンダサポートキャップ21を取り外し、また推進ジャッキ6を押し板5に図示省略されるロック手段にて固定する。なお、ここで、連結手段23による押し板5と後行曲線管4との連結を解除する際には、図5に示される連結ピン25を、抜き取る必要があるが、ブラケット24側の孔の位置に対し、後行曲線管4側の孔の位置が若干ずれてしまって連結ピン25を抜き取り難い場合がある。このような場合には、第1の押しボルト45もしくは第2の押しボルト46の操作にて後行曲線管4に図9中一点鎖線矢印で示される偶力もしくは同図中破線矢印で示される偶力を作用させることにより、後行曲線管4側の孔の位置をブラケット24側の孔の位置に合わせるように調整して、連結ピン25を抜き取り易い状態にするのがよい。   After the pushing operation of the curved tube is completed, the connection between the push plate 5 and the following curved tube 4 by the connecting means 23 is released, the cylinder support cap 21 is removed, and the propulsion jack 6 is illustrated on the push plate 5. Fix with the omitted locking means. Here, when releasing the connection between the push plate 5 and the trailing curved tube 4 by the connecting means 23, it is necessary to remove the connecting pin 25 shown in FIG. In some cases, the position of the hole on the side of the trailing curved tube 4 is slightly shifted from the position, so that it is difficult to remove the connecting pin 25. In such a case, it is indicated by the couple shown by the one-dot chain line arrow in FIG. 9 or the broken line arrow in the figure on the trailing curve pipe 4 by the operation of the first push bolt 45 or the second push bolt 46. It is preferable to adjust the position of the hole on the trailing curved tube 4 side to the position of the hole on the bracket 24 side by applying a couple, so that the connecting pin 25 can be easily pulled out.

次いで、図13(a)に示されるように、推進ジャッキ6を全縮となるまで収縮させて押し板5を中間位置にまで移動させるとともに、この中間位置において、ロック機構18を作動させて押し板5を傾斜補助架台3cに固定する。次いで、操作レバー20の操作にて推進ジャッキ受支部材19(図3参照)をジャッキ通過可能状態位置にするとともに、前記ロック手段によるロックを解除して押し板5に対し推進ジャッキ6をフリーな状態とした後に、図13(b)に示されるように、推進ジャッキ6を1ストローク分伸長させる。このとき推進ジャッキ6におけるボトム側支持部が推進ジャッキ挿通孔13(図2参照)を介して押し板5を通過される。次いで、再度、推進ジャッキ6を押し板5に図示省略されるロック手段にて固定する。そして、ロック機構18のロックを解除して後に、図13(c)に示されるように、推進ジャッキ6を全縮となるまで収縮させて押し板5を最高位置にまで移動させる。この最高位置にてロック機構18を作動させて押し板5を傾斜補助架台3cに固定することで、初期状態に戻る。   Next, as shown in FIG. 13 (a), the propulsion jack 6 is contracted to full contraction to move the push plate 5 to the intermediate position, and at this intermediate position, the lock mechanism 18 is operated and pushed. The plate 5 is fixed to the tilt auxiliary mount 3c. Next, by operating the operation lever 20, the propulsion jack receiving member 19 (see FIG. 3) is brought into a jack passable position, and the lock by the locking means is released so that the propulsion jack 6 is free from the push plate 5. After setting the state, as shown in FIG. 13B, the propulsion jack 6 is extended by one stroke. At this time, the bottom support portion of the propulsion jack 6 is passed through the push plate 5 via the propulsion jack insertion hole 13 (see FIG. 2). Next, the propulsion jack 6 is again fixed to the push plate 5 by a locking means (not shown). Then, after unlocking the lock mechanism 18, as shown in FIG. 13C, the propulsion jack 6 is contracted to full contraction and the push plate 5 is moved to the highest position. By operating the lock mechanism 18 at this highest position and fixing the push plate 5 to the tilt auxiliary frame 3c, the initial state is restored.

以上に述べた曲線管の1サイクルの埋設作業を繰り返すことにより、地中に円弧状のパイプ構造物が構築される。   An arc-shaped pipe structure is constructed in the ground by repeating the burying operation for one cycle of the curved pipe described above.

本実施形態の推進装置1によれば、曲線管4の周方向位置を調整する管周方向位置調整機構31と、曲線管4の縦方向位置を調整する管縦方向位置調整機構32と、曲線管4の後端部の中心と押し板5の嵌合部5bの中心とを合わせるセンタリング機構30とが設けられるので、先に押し込まれた曲線管4′に対してこれから押し込もうとする曲線管4の周方向位置がずれていたとしても、また先に押し込まれた曲線管4′に対してこれから押し込もうとする曲線管4の縦方向位置がずれていたとしても、更に押し板5の嵌合部5bの中心に対してこれから押し込もうとする曲線管4の後端部の中心位置がずれていたとしても、前記周方向位置のずれは管周方向位置調整機構31によって、また前記縦方向位置のずれは管縦方向位置調整機構32によって、更に前記中心位置のずれはセンタリング機構30によってそれぞれ容易になくすことができる。したがって、これから押し込もうとする曲線管4の当該推進装置1へのセット作業を効率良く行うことができる。   According to the propulsion device 1 of the present embodiment, a pipe circumferential position adjustment mechanism 31 that adjusts the circumferential position of the curved pipe 4, a pipe vertical position adjustment mechanism 32 that adjusts the vertical position of the curved pipe 4, and a curve Since a centering mechanism 30 is provided for aligning the center of the rear end of the tube 4 with the center of the fitting portion 5b of the push plate 5, the curve to be pushed into the previously pushed curve tube 4 '. Even if the circumferential position of the tube 4 is deviated, or even if the vertical position of the curved tube 4 to be pushed in is deviated from the previously pushed curved tube 4 ', the push plate 5 is further displaced. Even if the center position of the rear end portion of the curved pipe 4 to be pushed in from the center of the fitting portion 5b is shifted, the shift in the circumferential position is caused by the pipe circumferential position adjusting mechanism 31. The vertical position shift is a pipe vertical position adjustment mechanism. By 2, further displacement of the center position can be eliminated easily, respectively, by a centering mechanism 30. Therefore, the setting operation | work to the said propulsion apparatus 1 of the curved tube 4 which it is going to push in from now on can be performed efficiently.

本発明の一実施形態に係る推進装置の側面図The side view of the propulsion device concerning one embodiment of the present invention. 押し板の正面図Front view of push plate 押し板の背面図Rear view of push plate 図2のY矢視図Y arrow view of FIG. 図2のZ−Z矢視図ZZ arrow view of FIG. 図2のQ矢視図Q arrow view of FIG. 管径方向位置調整動作の説明図Explanatory drawing of pipe diameter direction position adjustment operation 図2のN矢視図N arrow view of FIG. 管周方向位置調整動作の説明図Illustration of pipe position adjustment operation 図1のX−X矢視図XX arrow view of FIG. 曲線管の埋設作業の説明図(1)Explanatory drawing (1) of burial work of curve pipe 曲線管の埋設作業の説明図(2)Explanatory drawing of burial work for curved pipe (2) 曲線管の埋設作業の説明図(3)Explanatory drawing of burial work (3) 従来の推進装置の側面図Side view of a conventional propulsion device

符号の説明Explanation of symbols

1 推進装置
3 架台
3b 傾斜架台(傾斜部)
4,4′ 曲線管
5 押し板
5b 嵌合部
6 推進ジャッキ
30 センタリング機構
31 管周方向位置調整機構
32 管縦方向位置調整機構
1 Propulsion device 3 Base 3b Inclined base (inclined part)
4, 4 'Curved pipe 5 Push plate 5b Fitting portion 6 Propulsion jack 30 Centering mechanism 31 Pipe circumferential position adjusting mechanism 32 Pipe vertical position adjusting mechanism

Claims (4)

傾斜部を有する架台と、この架台の傾斜部に沿って移動可能に設けられその傾斜部上に配された曲線管の後端部に嵌合する嵌合部を有する押し板と、この押し板に推進力を付与する推進ジャッキとを備える推進装置において、
前記嵌合部の周囲に配されて前記曲線管の径方向の位置を調整する少なくとも3個の管径方向位置調整機構よりなり、前記曲線管の後端部の中心と前記嵌合部の中心とを合わせるセンタリング機構と、
前記嵌合部の周囲に対向配置されて前記曲線管に対し接線方向の押し力を付与する一対の管接線方向押力発生機構よりなり、前記曲線管の周方向位置を調整する管周方向位置調整機構と、
前記架台の傾斜部の中央部に取着され、前記曲線管の下側面に接触して転動するローラを有して前記曲線管の縦方向位置を調整する管縦方向位置調整機構とを設ける
ことを特徴とする推進装置。
A gantry having an inclined portion, a push plate having a fitting portion that is movably provided along the inclined portion of the gantry and is fitted to the rear end portion of the curved pipe disposed on the inclined portion, and the push plate In a propulsion device comprising a propulsion jack that imparts propulsive force to
It is composed of at least three pipe radial position adjusting mechanisms arranged around the fitting part to adjust the radial position of the curved pipe, and the center of the rear end part of the curved pipe and the center of the fitting part A centering mechanism that matches
A pipe circumferential position for adjusting a circumferential position of the curved pipe , comprising a pair of pipe tangential pushing force generating mechanisms that are arranged opposite to each other around the fitting portion and apply a tangential pushing force to the curved pipe. An adjustment mechanism ;
A pipe vertical position adjusting mechanism is provided that is attached to the center of the inclined portion of the gantry and has a roller that rolls in contact with the lower surface of the curved pipe and adjusts the vertical position of the curved pipe. A propulsion device characterized by that.
前記管径方向位置調整機構は、前記嵌合部の径方向に揺動可能なアームと、該アームの一端部に回転可能に取着されるローラを備え、前記アームの回動により前記ローラが前記嵌合部の中心に向けて押し込まれるように構成されている請求項1に記載の推進装置。The tube radial direction position adjusting mechanism includes an arm that is swingable in a radial direction of the fitting portion, and a roller that is rotatably attached to one end portion of the arm. The propulsion device according to claim 1, wherein the propulsion device is configured to be pushed toward a center of the fitting portion. 前記管接線方向押力発生機構は、前記嵌合部の外周面に固着され、前記曲線管の後端部の外周面に突設された突起部を挟むように対向配置される一対の押しボルトの締め付けによって前記曲線管に対し接線方向の押し力を双方向に作用させるものである請求項1に記載の推進装置。The pipe tangential direction pressing force generating mechanism is fixed to the outer peripheral surface of the fitting portion, and is a pair of push bolts disposed so as to sandwich the protruding portion protruding from the outer peripheral surface of the rear end portion of the curved pipe. The propulsion device according to claim 1, wherein a tangential pushing force is applied to the curved pipe in both directions by tightening. 管縦方向位置調整機構は、前記曲線管の下側面に接触して転動するローラをローラ支持部材と、このローラ支持部材に連結されそのローラ支持部材を前記曲線管の縦方向に進退自在に案内する一対のリニアガイドと、この一対のリニアガイドの間に配されて前記ローラ支持部材に推進力を付与するジャッキとを備えて構成される請求項1に記載の推進装置。The pipe vertical position adjustment mechanism is a roller support member that is in contact with the lower surface of the curved pipe and rolls, and the roller support member is connected to the roller support member so that the roller support member can advance and retreat in the vertical direction of the curved pipe. The propulsion device according to claim 1, comprising a pair of linear guides to be guided and a jack that is disposed between the pair of linear guides and applies a propulsive force to the roller support member.
JP2005263985A 2005-09-12 2005-09-12 Propulsion device Expired - Fee Related JP4686313B2 (en)

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* Cited by examiner, † Cited by third party
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JPS52151216A (en) * 1976-06-09 1977-12-15 Mamoru Akashi Pipe attitude adjusting device at starting port for forcing pipe in pipe force method
JPS5813898A (en) * 1981-07-17 1983-01-26 新日本製鐵株式会社 Underground constructing method of curved pipe
JPH0248554Y2 (en) * 1984-02-23 1990-12-19
JP2002129877A (en) * 2000-10-23 2002-05-09 Ishikawajima Harima Heavy Ind Co Ltd Propulsion device
JP2005155057A (en) * 2003-11-21 2005-06-16 Kajima Corp Pipe-jacking apparatus

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