JP2022068393A - Driving-down device for pile press-fitting machine - Google Patents

Driving-down device for pile press-fitting machine Download PDF

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JP2022068393A
JP2022068393A JP2020177023A JP2020177023A JP2022068393A JP 2022068393 A JP2022068393 A JP 2022068393A JP 2020177023 A JP2020177023 A JP 2020177023A JP 2020177023 A JP2020177023 A JP 2020177023A JP 2022068393 A JP2022068393 A JP 2022068393A
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tubular pile
pile
press
fitting machine
tubular
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敏彦 村田
Toshihiko Murata
幸典 堀川
Yukinori Horikawa
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Giken Seisakusho Co Ltd
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Giken Seisakusho Co Ltd
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Abstract

To provide a driving-down device for a pile press-fitting machine that prevents a tubular pile from separating and falling during lifting without imposing inefficiency on a pile press-fitting process when the tubular pile is press-fitted into the ground by the pile press-fitting machine.SOLUTION: A driving-down device 40A that is connected to an end of a tubular pile 20 so as to extend the tubular pile 20 and is gripped by a chuck device of a pile press-fitting machine so that the tubular pile 20 can be press-fitted into the ground by the pile press-fitting machine comprises a main body 42, a clamping device 41 that is inserted into the tubular pile 20 and expands in diameter to grip the tubular pile 20, and a detachment prevention member 43a that prevents the clamping device 41 from detaching from the tubular pile 20 by invading a lower region (hole 20H) of a constituent member (wall portion 20W) of the tubular pile 20 with the insertion direction of the clamping device 41 into the tubular pile 20 downward. The detachment prevention member 43a is capable of drive control of the advance/retreat operation of moving to the detachment prevention position and the detachment prevention release position.SELECTED DRAWING: Figure 4

Description

本発明は、杭圧入機の打ち下げ装置に関する。 The present invention relates to a downhill device for a pile press-fitting machine.

従来、管状杭を杭圧入機で圧入する場合、対象となる杭を計画レベルまで打ち下げるために、打ち下げ装置が用いられる場合がある。
杭圧入機は、管状杭の上端部を把持するクランプ装置と、管状杭を把持するチャック装置と、チャック装置をクランプ装置に対して昇降させる昇降機構とを備えて構成される。
このような杭圧入機は、地盤に圧入された既設の管状杭をクランプ装置で把持して当該既設の管状杭から反力を取り、新たな管状杭をチャック装置で把持して地盤に圧入する。
この圧入される新たな管状杭の上端部に、円筒状の本体部を有した打ち下げ装置の下端部を挿し込んだ状態で連結することで、圧入される新たな管状杭の上端が延長されたような形態とする。その上で、上記昇降機構とチャック装置との共働により、新たな管状杭の上端をチャック装置の把持位置より下に打ち下げて、チャック装置で打ち下げ装置を把持しさらに打ち下げることができる。
このような打ち下げ装置を用いた管状杭の圧入方法は、チャック装置の上下ストロークの下死点より下に杭を打ち下げることを可能とする。
また、打ち下げ装置は管状杭の上端部に挿し込まれ、管状杭の上端部がチャック装置の把持力により径方向に潰れるように変形することを抑える。したがって、チャック装置の把持位置が管状杭の上端部までで杭圧入が終わる場合にも、管状杭の上端部に打ち下げ装置を接続することで、管状杭の上端部の変形を抑えて管状杭を地盤に圧入することができる。 Conventionally, when a tubular pile is press-fitted by a pile press-fitting machine, a down-down device may be used to lower the target pile to the planned level.
The pile press-fitting machine includes a clamp device that grips the upper end of the tubular pile, a chuck device that grips the tubular pile, and an elevating mechanism that raises and lowers the chuck device with respect to the clamp device.
In such a pile press-fitting machine, an existing tubular pile press-fitted into the ground is gripped by a clamp device to take a reaction force from the existing tubular pile, and a new tubular pile is gripped by a chuck device and press-fitted into the ground. ..
By connecting the lower end of the downing device having a cylindrical main body to the upper end of the new tubular pile to be press-fitted, the upper end of the new tubular pile to be press-fitted is extended. The form is as follows. Then, by the cooperation of the elevating mechanism and the chuck device, the upper end of the new tubular pile can be lowered below the gripping position of the chuck device, and the down device can be gripped by the chuck device and further lowered. ..
The press-fitting method of the tubular pile using such a downing device makes it possible to lower the pile below the bottom dead center of the vertical stroke of the chuck device.
Further, the downing device is inserted into the upper end portion of the tubular pile, and the upper end portion of the tubular pile is prevented from being deformed so as to be crushed in the radial direction due to the gripping force of the chuck device. Therefore, even when the pile press-fitting is completed when the gripping position of the chuck device reaches the upper end of the tubular pile, by connecting the downing device to the upper end of the tubular pile, deformation of the upper end of the tubular pile is suppressed and the tubular pile is suppressed. Can be press-fitted into the ground.

特許文献１に記載の発明にあっては、管状杭及び打ち下げ装置の連結体を吊り上げ、管状杭をチャック装置に把持させた状態に建て込む。本方法によれば、管状杭の圧入が進行した後に打ち下げ装置を吊り上げて当該管状杭の上端に接続する必要がなく、効率的である。
しかし、管状杭が打ち下げ装置から分離、落下することを防止するため、打ち下げ装置と管状杭とをワイヤーで連結する必要性があった。このとき、打ち下げ装置と管状杭とを連結するワイヤーは、管状杭の外周面に固設された吊り用連結部に連結していた。 In the invention described in Patent Document 1, the tubular pile and the connecting body of the downing device are lifted and built in a state where the tubular pile is gripped by the chuck device. According to this method, it is not necessary to lift the downing device and connect it to the upper end of the tubular pile after the press-fitting of the tubular pile has progressed, which is efficient.
However, in order to prevent the tubular pile from being separated from the downhill device and falling, it was necessary to connect the downhill device and the tubular pile with a wire. At this time, the wire connecting the downing device and the tubular pile was connected to the suspension connecting portion fixed on the outer peripheral surface of the tubular pile.

特開２０１７－０３１５６８号公報Japanese Unexamined Patent Publication No. 2017-031568

しかしながら、管状杭の外周面に固設された吊り用連結部があると、圧入工程において杭圧入機のチャック装置の把持位置に当該吊り用連結部が差し掛かる前に、作業者がチャック装置に登り、当該吊り用連結部を切断する必要があり、管状杭と打ち下げ装置の連結体をチャック装置に建て込んだ後の圧入工程に非効率が強いられた。 However, if there is a suspension connecting portion fixed on the outer peripheral surface of the tubular pile, the operator can attach the suspension connecting portion to the chuck device before the suspension connecting portion reaches the gripping position of the chuck device of the pile press-fitting machine in the press-fitting process. It was necessary to climb and cut the suspension joint, which forced inefficiency in the press-fitting process after the tubular pile and the coupling of the downhill device were built into the chuck device.

本発明は以上の従来技術における問題に鑑みてなされたものであって、管状杭と打ち下げ装置の連結体を吊り上げて杭圧入機のチャック装置に把持させた状態に建て込み、当該杭圧入機により当該管状杭を地盤に圧入させるに際して、杭圧入工程に非効率を強いることなく、吊り上げ時、当該管状杭が当該打ち下げ装置から分離、落下することを防止することを課題とする。 The present invention has been made in view of the above problems in the prior art, in which a connecting body of a tubular pile and a downhill device is lifted and built in a state where it is gripped by a chuck device of a pile press-fitting machine. It is an object of the present invention to prevent the tubular pile from being separated from the downhill device and falling during lifting without inefficiency in the pile press-fitting process when the tubular pile is press-fitted into the ground.

以上の課題を解決するための本発明の一つの形態は、管状杭を延長するように当該管状杭の端部に連結され、杭圧入機のチャック装置に把持されて当該杭圧入機により前記管状杭を地盤に圧入可能にする打ち下げ装置であって、
前記チャック装置に把持され前記管状杭の軸方向端面に当接する軸方向端面を有し、前記管状杭の延長部に相当する本体部と、
前記本体部から軸方向に突設され、拡径・縮径する動作が駆動制御可能で、前記管状杭内に挿入されて拡径することで当該管状杭を把持するクランプ装置と、
前記クランプ装置の前記管状杭内へ挿入方向を下方向として、前記管状杭の構成部材の下方域に侵入することで、前記クランプ装置の管状杭内からの離脱を阻止する離脱阻止部材と、を備え、
前記離脱阻止部材は、前記下方域に侵入する離脱阻止位置と、前記下方域から退避した離脱阻止解除位置とに移動する進退動作が駆動制御可能にされている杭圧入機の打ち下げ装置である。 One embodiment of the present invention for solving the above problems is connected to the end of the tubular pile so as to extend the tubular pile, gripped by the chuck device of the pile press-fitting machine, and the tubular by the pile press-fitting machine. A downhill device that allows piles to be press-fitted into the ground.
A main body portion having an axial end surface that is gripped by the chuck device and abuts on the axial end surface of the tubular pile and corresponds to an extension portion of the tubular pile.
A clamp device that is projected in the axial direction from the main body and can drive and control the operation of expanding and contracting the diameter, and is inserted into the tubular pile to expand the diameter to grip the tubular pile.
A detachment prevention member that prevents the clamp device from being detached from the tubular pile by invading the lower region of the constituent member of the tubular pile with the insertion direction into the tubular pile of the clamp device as a downward direction. Prepare,
The detachment prevention member is a downing device for a pile press-fitting machine in which the advance / retreat operation of moving to the detachment prevention position invading the lower area and the detachment prevention release position retracted from the lower area can be driven and controlled. ..

本発明の打ち下げ装置を適用すれば、管状杭と打ち下げ装置の連結体を吊り上げて杭圧入機のチャック装置に把持させた状態に建て込み、当該杭圧入機により当該管状杭を地盤に圧入させるに際して、吊り上げ時、離脱阻止部材により当該管状杭が当該打ち下げ装置から分離、落下することを防止することができ、当該管状杭の外周面に固設された吊り用連結部は不要であるので当該吊り用連結部の切断作業を無くすことができ、吊り上げ時の離脱阻止策によって杭圧入工程に非効率を強いること避けることができる。 If the downing device of the present invention is applied, the connecting body of the tubular pile and the downing device is lifted and built in a state of being gripped by the chuck device of the pile press-fitting machine, and the tubular pile is press-fitted into the ground by the pile press-fitting machine. At the time of lifting, the tubular pile can be prevented from being separated from the downing device and falling by the detachment preventing member, and the hanging connecting portion fixed to the outer peripheral surface of the tubular pile is unnecessary. Therefore, it is possible to eliminate the cutting work of the hanging connecting portion, and it is possible to avoid inefficiency in the pile press-fitting process by the detachment prevention measures at the time of lifting.

本発明の第１実施形態に係る打ち下げ装置の側面図である。It is a side view of the downhill device which concerns on 1st Embodiment of this invention. 図１におけるＡ－Ａ線についての打ち下げ装置の断面図である。It is sectional drawing of the launching apparatus about line AA in FIG. 図２におけるＢ－Ｂ線についての打ち下げ装置の断面図である。It is sectional drawing of the launching apparatus about line BB in FIG. 本発明の第１実施形態に係る打ち下げ装置及びこれに連結された管状杭の側面図（管状杭は断面を示す）である。It is a side view (the tubular pile shows the cross section) of the downhill device which concerns on 1st Embodiment of this invention, and the tubular pile connected to this. 図４におけるＣ－Ｃ線についての打ち下げ装置及び管状杭の断面図である。FIG. 4 is a cross-sectional view of a downhill device and a tubular pile for the CC line in FIG. 本発明の第１実施形態に係る打ち下げ装置及びこれに連結された管状杭が吊り上げられた状態を示す。A state in which a downhill device according to the first embodiment of the present invention and a tubular pile connected thereto are lifted is shown. 管状杭の圧入方法に用いられる杭圧入機や杭の側面図（一部内部可視化）である。It is a side view (partially internal visualization) of a pile press-fitting machine and a pile used for a press-fitting method of a tubular pile. 横倒し状態で吊りワイヤーが掛けられた打ち下げ装置とこれに連結された管状杭を示す図である。It is a figure which shows the downhill device in which the suspension wire was hung in the sideways state, and the tubular pile connected to this. 図８の状態から傾く程度に吊り上げられた状態を示す図である。It is a figure which shows the state which was lifted to the extent that it tilted from the state of FIG. 図９の状態から鉛直姿勢になるまで吊り上げられた状態を示す図である。図８，９と本図とでは９０度視点が異なる。It is a figure which shows the state which was lifted from the state of FIG. 9 to the vertical posture. The 90-degree viewpoint differs between FIGS. 8 and 9 and this figure. 本発明の第２実施形態に係る打ち下げ装置及び管状杭の側面図（クランプ装置及び管状杭は断面を示す）である。It is a side view of the downhill device and the tubular pile which concerns on 2nd Embodiment of this invention (the clamp device and the tubular pile show the cross section). 本発明の第２実施形態に係る打ち下げ装置及びこれに把持された管状杭の側面図（クランプ装置及び管状杭は断面を示す）である。It is a side view of the downhill device which concerns on 2nd Embodiment of this invention, and the tubular pile held by this (the clamp device and the tubular pile show the cross section). 本発明の第２実施形態に係る打ち下げ装置及びこれに把持され離脱防止部材も掛けられた管状杭の側面図（クランプ装置及び管状杭は断面を示す）である。It is a side view of the downhill device which concerns on 2nd Embodiment of this invention, and the tubular pile which was grasped and hung with the detachment prevention member (the clamp device and the tubular pile show the cross section). 本発明の第３実施形態に係る打ち下げ装置の側面図（クランプ装置は断面を示す）である。It is a side view of the downhill device which concerns on 3rd Embodiment of this invention (the clamp device shows a cross section). 本発明の第３実施形態に係る打ち下げ装置に把持される管状杭の縦断面図である。It is a vertical sectional view of the tubular pile held by the downhill device which concerns on 3rd Embodiment of this invention. 本発明の第３実施形態に係る打ち下げ装置及びこれに連結された管状杭の側面図（クランプ装置及び管状杭は断面を示す）である。It is a side view of the downhill device which concerns on 3rd Embodiment of this invention, and the tubular pile connected to this (the clamp device and the tubular pile show the cross section).

以下に本発明の一実施形態につき図面を参照して説明する。以下は本発明の一実施形態であって本発明を限定するものではない。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The following is an embodiment of the present invention and does not limit the present invention.

〔第１実施形態〕
まず、図１から図１０を参照して本発明の第１実施形態につき説明する。なお、「上端」「下端」「下方」等の上下関係を示す用語は、打ち下げ装置を上に管状杭を下にして立てた状態における上下を基準としている。
本発明の第１実施形態に係る打ち下げ装置４０Ａは、円筒状の本体部４２と、クランプ装置４１と、離脱阻止部材４３ａと、吊り用連結部４４を備える。
本体部４２は、管状杭２０の軸方向端面（上端面）に当接する軸方向端面４２ａを有する。これにより圧入力を打ち下げ装置４０Ａから管状杭２０に伝える。
クランプ装置４１は、本体部４２の下端部に本体部４２から軸方向に突設されている。
吊り用連結部４４は、本体部４２の上端に設けられており、吊り具を通す孔を有する。
クランプ装置４１の押圧部材４１ａと離脱阻止部材４３ａとが一体であり、離脱阻止部材４３ａは、クランプ装置４１の押圧部材４１ａの押圧面から径方向外方に突出するように設けられている。
図４及び図６に示すように打ち下げ装置４０Ａは、管状杭２０を延長するように当該管状杭２０の上端部に連結され、図７に示す杭圧入機３０のチャック装置３６に把持されて杭圧入機３０により管状杭２０を地盤に圧入可能にする。本体部４２が管状杭２０の延長部に相当する。 [First Embodiment]
First, the first embodiment of the present invention will be described with reference to FIGS. 1 to 10. In addition, the terms indicating the vertical relationship such as "upper end", "lower end", and "lower side" are based on the upper and lower sides when the down device is erected with the tubular pile down.
The down-down device 40A according to the first embodiment of the present invention includes a cylindrical main body portion 42, a clamp device 41, a detachment prevention member 43a, and a suspension connecting portion 44.
The main body portion 42 has an axial end surface 42a that abuts on the axial end surface (upper end surface) of the tubular pile 20. As a result, the pressure input is transmitted from the down device 40A to the tubular pile 20.
The clamp device 41 is provided at the lower end of the main body 42 in the axial direction from the main body 42.
The hanging connecting portion 44 is provided at the upper end of the main body portion 42 and has a hole through which the hanging tool is passed.
The pressing member 41a of the clamp device 41 and the detachment preventing member 43a are integrated, and the detaching preventing member 43a is provided so as to project radially outward from the pressing surface of the pressing member 41a of the clamping device 41.
As shown in FIGS. 4 and 6, the downing device 40A is connected to the upper end of the tubular pile 20 so as to extend the tubular pile 20, and is gripped by the chuck device 36 of the pile press-fitting machine 30 shown in FIG. The pile press-fitting machine 30 enables the tubular pile 20 to be press-fitted into the ground. The main body portion 42 corresponds to an extension portion of the tubular pile 20.

ここで、管状杭の圧入方法の工程に沿って説明する。
まず、図８に示すように地上作業において新たな管状杭２０の上端部に、打ち下げ装置４０Ａの下端部であるクランプ装置４１を挿し込んだ状態でクランプ装置４１により管状杭２０を把持する。これにより、管状杭２０を打ち下げ装置４０Ａの本体部４２で延長するように管状杭２０と打ち下げ装置４０Ａとを連結する。
なお、流体物供給配管（ホース１５、図７参照）を打ち下げ装置４０Ａの内部を通して設置する。以上の工程は、作業性のため打ち下げ装置４０Ａ及び管状杭２０を横倒しにした状態で行う。 Here, the process of the press-fitting method of the tubular pile will be described.
First, as shown in FIG. 8, the tubular pile 20 is gripped by the clamp device 41 in a state where the clamp device 41, which is the lower end portion of the downing device 40A, is inserted into the upper end portion of the new tubular pile 20 in the ground work. As a result, the tubular pile 20 and the downing device 40A are connected so as to extend the tubular pile 20 at the main body 42 of the downing device 40A.
The fluid supply pipe (hose 15, see FIG. 7) is installed through the inside of the downhill device 40A. The above steps are performed with the downhill device 40A and the tubular pile 20 laid on their side for workability.

次に、図８に示すようにクレーンからの吊ワイヤー９等の吊り具を、打ち下げ装置４０Ａの吊り用連結部４４に連結する。
次に、そのクレーンによって図９さらに図１０に示すように新たな管状杭２０及び打ち下げ装置４０Ａを吊り上げ、新たな管状杭２０を図７に示す杭圧入機３０のチャック装置３６に把持させた状態に建て込む。 Next, as shown in FIG. 8, a hanging tool such as a hanging wire 9 from a crane is connected to a hanging connecting portion 44 of the down device 40A.
Next, the new tubular pile 20 and the downing device 40A were lifted by the crane as shown in FIG. 9 and FIG. 10, and the new tubular pile 20 was gripped by the chuck device 36 of the pile press-fitting machine 30 shown in FIG. Build in the state.

杭圧入機３０の構成、機能は次の通りである。
杭圧入機３０は、サドル３１の下部に設けられたクランプ装置３２と、サドル３１上を前後動可能に設けられたスライドベース３３と、スライドベース３３上に旋回可能に立設されたマスト３４と、昇降機構３５と、昇降機構３５を介してマスト３４に支持されたチャック装置３６とを備える。昇降機構３５の動作により、チャック装置３６をマスト３４、従ってクランプ装置３２に対して昇降させることができる。
クランプ装置３２は、管状杭２０に挿入され管状杭２０の内周面に向かって進退し当該内周面を押圧する押圧部材を放射状に複数配置して有し、各押圧部材を互いに径方向に離れるように拡開させることで管状杭２０の上端部を内側から把持する。
チャック装置３６は、管状杭２０が挿入される開口を有するとともに、当該開口に挿入された管状杭２０の外周面に向かって進退し当該外周面を押圧する押圧部材を放射状に複数配置して有し、各押圧部材を互いに径方向に近づくように縮閉させることで管状杭を外側から把持する。また、チャック装置３６は、把持した管状杭２０や打ち下げ装置４０Ａを回転させる機能を有し、杭圧入機３０は回転圧入工法が実施可能である。
図７に示す杭圧入機３０は、地盤に圧入された既設の管状杭２０ａ，２０ｂ，２０ｃをクランプ装置３２ａ，３２ｂ，３２ｃで把持して当該既設の管状杭２０ａ，２０ｂ，２０ｃから反力を取り、新たな管状杭２０ｅをチャック装置３６で把持して地盤に圧入する管状杭の圧入方法を実施可能である（図７はさらにサドル３１が前進した場面）。 The configuration and function of the pile press-fitting machine 30 are as follows.
The pile press-fitting machine 30 includes a clamp device 32 provided at the bottom of the saddle 31, a slide base 33 movably provided on the saddle 31, and a mast 34 erected on the slide base 33 so as to be rotatable. The elevating mechanism 35 and the chuck device 36 supported by the mast 34 via the elevating mechanism 35 are provided. By the operation of the elevating mechanism 35, the chuck device 36 can be elevated and lowered with respect to the mast 34 and thus the clamp device 32.
The clamp device 32 has a plurality of pressing members that are inserted into the tubular pile 20 and advance and retreat toward the inner peripheral surface of the tubular pile 20 to press the inner peripheral surface in a radial manner, and the pressing members are radially arranged with respect to each other. The upper end of the tubular pile 20 is gripped from the inside by expanding it so as to be separated.
The chuck device 36 has an opening into which the tubular pile 20 is inserted, and a plurality of pressing members that advance and retreat toward the outer peripheral surface of the tubular pile 20 inserted into the opening and press the outer peripheral surface are radially arranged. Then, the tubular pile is gripped from the outside by contracting each pressing member so as to approach each other in the radial direction. Further, the chuck device 36 has a function of rotating the gripped tubular pile 20 and the downing device 40A, and the pile press-fitting machine 30 can carry out a rotary press-fitting method.
The pile press-fitting machine 30 shown in FIG. 7 grips the existing tubular piles 20a, 20b, 20c pressed into the ground with the clamp devices 32a, 32b, 32c and applies a reaction force from the existing tubular piles 20a, 20b, 20c. It is possible to carry out a method of press-fitting the tubular pile by grasping the new tubular pile 20e with the chuck device 36 and press-fitting the new tubular pile 20e into the ground (FIG. 7 shows a scene in which the saddle 31 is further advanced).

一方、スイベルジョイント１４の上端部に、流体物供給装置からのホース４を接続し、同ホース４と、ホース１５とがスイベルジョイント１４を介して流体物を流通させるように接続する。スイベルジョイント１４の上端部に接続するホース４をサポートアーム１６の先端に支持された掛け金１７に掛ける。なお、このホース４の接続は、次の流体物吐出を行う前であれば、どの段階で行ってもよいが、クレーンによって新たな管状杭２０及び打ち下げ装置４０Ａを吊り上げる前に行うことが好ましい。管状杭２０及び打ち下げ装置４０Ａが不安定な状態での接続作業や高所での接続作業を回避できるからである。
次に、流体供給配管（４，１４，１５，２２，２５を含む）を通して流体物を新たな管状杭２０ｅの先端部の圧入に抗する地盤に吐出しながら杭圧入機３０を動作させ、チャック装置３６の把持位置に打ち下げ装置４０Ａが下がるまで新たな管状杭２０ｅを打ち下げて地盤に圧入する。
チャック装置３６の把持位置に打ち下げ装置４０Ａが下がるまでとは、図７に示すように直接に打ち下げ装置４０Ａの本体部４２を把持するまでに限らず、直接的には管状杭２０を把持するけれども、チャック装置３６の把持位置の上下方向範囲に打ち下げ装置４０Ａのクランプ装置４１が進入していればよい。チャック装置３６の把持力による管状杭２０の潰れを、クランプ装置４１による内側からの押圧により防止して、打ち下げ装置４０Ａを使用する意義が顕在化するからである。
なお、管状杭２０ｅを計画レベルまで打ち下げた後、チャック装置３６による打ち下げ装置４０Ａの把持を維持しつつ、クランプ装置３２の把持解除、サドル３１の上昇、サドル３１の前進、サドル３１の下降、クランプ装置３２の再把持に過程により、既設の管状杭２０ｂ，２０ｃ，２０ｄをクランプ装置３２ａ，３２ｂ，３２ｃで把持すると図７に示す状態となり、打ち下げ装置４０Ａを管状杭２０ｅから分離し回収再利用して、管状杭２０ｅの先にさらに管状杭の圧入が行える。 On the other hand, a hose 4 from a fluid supply device is connected to the upper end of the swivel joint 14, and the hose 4 and the hose 15 are connected so as to circulate the fluid through the swivel joint 14. A hose 4 connected to the upper end of the swivel joint 14 is hung on a latch 17 supported by the tip of the support arm 16. The hose 4 may be connected at any stage before the next fluid discharge is performed, but it is preferable that the hose 4 is connected before the new tubular pile 20 and the downhill device 40A are lifted by the crane. .. This is because the tubular pile 20 and the downhill device 40A can avoid the connection work in an unstable state and the connection work in a high place.
Next, the pile press-fitting machine 30 is operated while discharging the fluid through the fluid supply pipe (including 4, 14, 15, 22, 25) to the ground that opposes the press-fitting of the tip of the new tubular pile 20e, and the chuck is chucked. A new tubular pile 20e is lowered and press-fitted into the ground until the downing device 40A is lowered to the gripping position of the device 36.
The time until the downing device 40A is lowered to the gripping position of the chuck device 36 is not limited to the time when the main body portion 42 of the downing device 40A is directly gripped as shown in FIG. 7, but the tubular pile 20 is directly gripped. However, it is sufficient that the clamp device 41 of the down device 40A has entered the vertical range of the gripping position of the chuck device 36. This is because the significance of using the down device 40A becomes apparent by preventing the tubular pile 20 from being crushed by the gripping force of the chuck device 36 by being pressed from the inside by the clamp device 41.
After the tubular pile 20e is lowered to the planned level, the clamp device 32 is released from the grip, the saddle 31 is raised, the saddle 31 is advanced, and the saddle 31 is lowered while maintaining the grip of the down device 40A by the chuck device 36. When the existing tubular piles 20b, 20c, 20d are gripped by the clamp devices 32a, 32b, 32c in the process of re-grasping the clamp device 32, the state shown in FIG. 7 is obtained, and the downing device 40A is separated from the tubular pile 20e and recovered. By reusing, the tubular pile can be further press-fitted into the tip of the tubular pile 20e.

クランプ装置４１は、杭圧入機３０のクランプ装置３２（図７参照）と同様の機構のもので、管状杭２０の内周面を押圧する押圧部材４１ａやこれを進退動作させ、所定の把持力を達成するための押圧力を発揮できるシリンダ装置４１ｂを有する。
すなわち、油圧システムによりシリンダ装置４１ｂを制御することで、クランプ装置４１の拡径・縮径する動作が駆動制御可能であり、クランプ装置４１が管状杭２０内に挿入されて拡径することで当該管状杭２０を把持する。 The clamp device 41 has the same mechanism as the clamp device 32 (see FIG. 7) of the pile press-fitting machine 30. It has a cylinder device 41b capable of exerting a pressing force for achieving the above.
That is, by controlling the cylinder device 41b by the hydraulic system, the operation of expanding / reducing the diameter of the clamping device 41 can be driven and controlled, and the clamping device 41 is inserted into the tubular pile 20 to expand the diameter. Hold the tubular pile 20.

次に、以上の工程における離脱阻止部材４３ａの働き等につき説明する。
離脱阻止部材４３ａは、クランプ装置４１の管状杭２０内へ挿入方向を下方向として、管状杭２０の構成部材の下方域に侵入することで、クランプ装置４１の管状杭２０内からの離脱を阻止する。
第１実施形態にあっては、当該下方域は、図４、図５に示すように管状杭２０の壁部２０Ｗに穿設された孔２０Ｈの中の領域である。
クランプ装置４１のシリンダ装置４１ｂにより、押圧部材４１ａ及び離脱阻止部材４３ａが後退位置に配置された状態で、クランプ装置４１を管状杭２０内に挿入する。このとき、離脱阻止部材４３ａを孔２０Ｈに対向させる。次に、クランプ装置４１のシリンダ装置４１ｂにより、押圧部材４１ａ及び離脱阻止部材４３ａを径方向外方に進行させ、押圧部材４１ａにより管状杭２０の内周面を押圧して把持するとともに、離脱阻止部材４３ａを孔２０Ｈに挿入する。
以上のようにして離脱阻止部材４３ａにより、クランプ装置４１の管状杭２０内からの離脱が阻止された状態となる。この状態において打ち下げ装置４０Ａのみをクレーンにより直接吊り上げれば、管状杭２０の脱落が離脱阻止部材４３ａにより防止された安全な状態で、打ち下げ装置４０Ａ及び管状杭２０を吊り上げチャック装置３６に運搬することができる。 Next, the function of the detachment preventing member 43a and the like in the above steps will be described.
The detachment prevention member 43a prevents the clamp device 41 from detaching from the inside of the tubular pile 20 by invading the lower region of the constituent member of the tubular pile 20 with the insertion direction into the tubular pile 20 of the clamp device 41 downward. do.
In the first embodiment, the lower region is a region in the hole 20H formed in the wall portion 20W of the tubular pile 20 as shown in FIGS. 4 and 5.
The clamp device 41 is inserted into the tubular pile 20 in a state where the pressing member 41a and the detachment preventing member 43a are arranged at the retracted positions by the cylinder device 41b of the clamping device 41. At this time, the detachment preventing member 43a is made to face the hole 20H. Next, the cylinder device 41b of the clamp device 41 advances the pressing member 41a and the detachment preventing member 43a radially outward, and the pressing member 41a presses and grips the inner peripheral surface of the tubular pile 20 and prevents the detachment. The member 43a is inserted into the hole 20H.
As described above, the detachment preventing member 43a prevents the clamping device 41 from detaching from the tubular pile 20. If only the downing device 40A is directly lifted by the crane in this state, the downing device 40A and the tubular pile 20 are transported to the lifting chuck device 36 in a safe state in which the tubular pile 20 is prevented from falling off by the detachment preventing member 43a. can do.

第１実施形態の打ち下げ装置４０Ａにあっては、管状杭２０の内周面を押圧して把持するクランプ装置４１の押圧部材４１ａと離脱阻止部材４３ａとが一体であることにより、離脱阻止部材４３ａは、クランプ装置４１の拡径・縮径する動作に機械的に連動することで、上記下方域（孔２０Ｈ内）に侵入する離脱阻止位置と、上記下方域（孔２０Ｈ内）から退避した離脱阻止解除位置とに移動する進退動作が駆動制御可能にされている。本実施形態にあっては、機械的連動は、単純に一体に移動するものであるが、伝動機構を介在させることで離脱阻止部材４３ａを、押圧部材４１ａとは異なる軌道で動作させてもよい（例えば図１５に示す凸部２０Ｒの下方領域に対して進退するために、離脱阻止部材４３ａを管状杭２０の周方向に沿った進退動作としてもよい）。
この進退動作は、本実施形態では管状杭２０の径方向に沿った進退動作を伴うものとされ、また離脱阻止部材４３ａは、クランプ装置４１とともに管状杭２０内に挿入され、離脱阻止解除位置においては上記下方域（孔２０Ｈ内）より管状杭２０の径方向内側に退避する。
したがって、第１実施形態の打ち下げ装置４０Ａによれば、チャック装置３６により管状杭２０を把持した状態から打ち下げ装置４０Ａを把持した状態まで中断なく圧入を続行することができる。 In the downhill device 40A of the first embodiment, the release preventing member 43a is integrated with the pressing member 41a of the clamp device 41 that presses and grips the inner peripheral surface of the tubular pile 20. By mechanically interlocking with the operation of expanding / reducing the diameter of the clamp device 41, the 43a is retracted from the detachment prevention position in the lower region (inside the hole 20H) and the lower region (inside the hole 20H). The drive control is enabled for the advance / retreat operation to move to the detachment prevention release position. In the present embodiment, the mechanical interlocking simply moves integrally, but the detachment prevention member 43a may be operated in a different trajectory from the pressing member 41a by interposing a transmission mechanism. (For example, in order to move forward and backward with respect to the lower region of the convex portion 20R shown in FIG. 15, the detachment preventing member 43a may be moved forward and backward along the circumferential direction of the tubular pile 20).
In the present embodiment, this advancing / retreating operation is accompanied by an advancing / retreating operation along the radial direction of the tubular pile 20, and the detachment preventing member 43a is inserted into the tubular pile 20 together with the clamp device 41 at the detachment blocking release position. Retreats inward in the radial direction of the tubular pile 20 from the lower area (inside the hole 20H).
Therefore, according to the down-down device 40A of the first embodiment, press-fitting can be continued without interruption from the state in which the tubular pile 20 is gripped by the chuck device 36 to the state in which the down-down device 40A is gripped.

〔第２実施形態〕
上記第１実施形態の打ち下げ装置４０Ａに代え、図１１から図１３に示すように第２実施形態の打ち下げ装置４０Ｂを適用し、管状杭の圧入方法を上記第１実施形態と同様に実施する。
上記第１実施形態では、押圧部材４１ａの駆動制御と、離脱阻止部材４３ａの駆動制御とを共通としたが、図１１から図１３に示す第２実施形態の打ち下げ装置４０Ｂは、離脱阻止部材４３ａを動作させる独立したシリンダ装置４３ｂを有する。
すなわち、離脱阻止部材４３ａは、クランプ装置４１の拡径・縮径動作とは独立して、離脱阻止位置と離脱阻止解除位置との間の進退動作が駆動制御可能にされている。
離脱阻止部材４３ａの進退を押圧部材４１ａの進退とは独立に制御する点が上記第１実施形態と異なり、その他は、上記第１実施形態と同様に実施できる。流れを説明すれば以下の通りである。
まず、クランプ装置４１のシリンダ装置４１ｂ及びシリンダ装置４３ｂにより、押圧部材４１ａ及び離脱阻止部材４３ａが後退位置に配置された状態で、クランプ装置４１を管状杭２０内に挿入する。このとき、離脱阻止部材４３ａを孔２０Ｈに対向させる。次に、クランプ装置４１のシリンダ装置４１ｂにより、押圧部材４１ａを径方向外方に進行させ、押圧部材４１ａにより管状杭２０の内周面を押圧して把持する。また、シリンダ装置４３ｂにより、離脱阻止部材４３ａを径方向外方に進行させ、離脱阻止部材４３ａを孔２０Ｈに挿入する。押圧部材４１ａによる把持と、離脱阻止部材４３ａの孔２０Ｈへの挿入のタイミングは、前後してもよいし、同時でもよい。
以上のようにして離脱阻止部材４３ａにより、クランプ装置４１の管状杭２０内からの離脱が阻止された状態となる。この状態において打ち下げ装置４０Ｂのみをクレーンにより直接吊り上げれば、管状杭２０の脱落が離脱阻止部材４３ａにより防止された安全な状態で、打ち下げ装置４０Ｂ及び管状杭２０を吊り上げチャック装置３６に運搬することができる。 [Second Embodiment]
Instead of the down-down device 40A of the first embodiment, the down-down device 40B of the second embodiment is applied as shown in FIGS. 11 to 13, and the method of press-fitting the tubular pile is carried out in the same manner as in the first embodiment. do.
In the first embodiment, the drive control of the pressing member 41a and the drive control of the detachment preventing member 43a are common, but the launching device 40B of the second embodiment shown in FIGS. 11 to 13 has the detachment preventing member. It has an independent cylinder device 43b that operates 43a.
That is, the detachment prevention member 43a is capable of drive control of the advance / retreat operation between the detachment prevention position and the detachment prevention release position independently of the diameter expansion / reduction operation of the clamp device 41.
It differs from the first embodiment in that the advance / retreat of the detachment preventing member 43a is controlled independently of the advance / retreat of the pressing member 41a, and other than that, it can be carried out in the same manner as the first embodiment. The flow is as follows.
First, the clamp device 41 is inserted into the tubular pile 20 in a state where the pressing member 41a and the detachment preventing member 43a are arranged at the retracted positions by the cylinder device 41b and the cylinder device 43b of the clamp device 41. At this time, the detachment preventing member 43a is made to face the hole 20H. Next, the cylinder device 41b of the clamp device 41 advances the pressing member 41a radially outward, and the pressing member 41a presses and grips the inner peripheral surface of the tubular pile 20. Further, the cylinder device 43b advances the detachment preventing member 43a radially outward, and the detachment preventing member 43a is inserted into the hole 20H. The timing of gripping by the pressing member 41a and the insertion of the detachment preventing member 43a into the hole 20H may be before or after, or may be simultaneous.
As described above, the detachment preventing member 43a prevents the clamping device 41 from detaching from the tubular pile 20. If only the downing device 40B is directly lifted by the crane in this state, the downing device 40B and the tubular pile 20 are transported to the lifting chuck device 36 in a safe state in which the tubular pile 20 is prevented from falling off by the detachment preventing member 43a. can do.

第２実施形態のＢによれば、押圧部材４１ａによる把持・把持解除動作から独立して、離脱阻止部材４３ａによる離脱阻止・離脱阻止解除の動作が可能である。したがって、例えば、管状杭２０及び打ち下げ装置４０Ｂの連結体をチャック装置３６に建て込んだ後は、離脱阻止部材４３ａを内側に引き込んで離脱阻止解除位置に配置してもよい。
また、本実施形態にあっては、離脱阻止部材４３ａの進退は押圧部材４１ａの進退とは独立に駆動されるので、離脱阻止部材４３ａを押圧部材４１ａとは異なる軌道で動作させてもよい（例えば図１５に示す凸部２０Ｒの下方領域に対して進退するために、離脱阻止部材４３ａを管状杭２０の周方向に沿った進退動作としてもよい）。 According to B of the second embodiment, it is possible to perform the operation of preventing / releasing the detachment by the detachment preventing member 43a independently of the operation of grasping / releasing by the pressing member 41a. Therefore, for example, after the connecting body of the tubular pile 20 and the downing device 40B is built in the chuck device 36, the detachment prevention member 43a may be pulled inward and arranged at the detachment prevention release position.
Further, in the present embodiment, since the advance / retreat of the detachment preventing member 43a is driven independently of the advance / retreat of the pressing member 41a, the detaching preventing member 43a may be operated in a different trajectory from the pressing member 41a (in this embodiment). For example, in order to move forward and backward with respect to the lower region of the convex portion 20R shown in FIG. 15, the detachment preventing member 43a may be moved forward and backward along the circumferential direction of the tubular pile 20).

〔第３実施形態〕
上記第１実施形態の打ち下げ装置４０Ａに代え、図１４から図１６に示すように第３実施形態の打ち下げ装置４０Ｃを適用し、管状杭の圧入方法を上記第１実施形態と同様に実施する。
上記第１及び第２実施形態では、離脱阻止部材が侵入する管状杭２０の構成部材の下方域を、管状杭２０の壁部２０Ｗに穿設された孔２０Ｈの中の領域としたが、図１４から図１６に示す第３実施形態にあっては、離脱阻止部材４３ｃが侵入する管状杭の構成部材の下方域を、図１５に示す管状杭２０の内周面に設けられた凸部２０Ｒの下方領域とする。すなわち、離脱阻止部材４３ｃによって下方域に侵入される管状杭２０の構成部材が凸部２０Ｒである。
例えば、図１４に示すように離脱阻止部材４３ｃは、先端が凸部２０Ｒの下に入り込めるフック状に構成される。
本実施形態における作業動作は、上記第１実施形態と同様である。図１６に示すようにクランプ装置４１により管状杭２０を把持するとともに、離脱阻止部材４３ｃが凸部２０Ｒの下方域に侵入して、クランプ装置４１の管状杭２０内からの離脱が阻止された状態となる。この状態において打ち下げ装置４０Ｃのみをクレーンにより直接吊り上げれば、管状杭２０の脱落が離脱阻止部材４３ａにより防止された安全な状態で、打ち下げ装置４０Ｃ及び管状杭２０を吊り上げチャック装置３６に運搬することができる。 [Third Embodiment]
Instead of the down-down device 40A of the first embodiment, the down-down device 40C of the third embodiment is applied as shown in FIGS. 14 to 16, and the method of press-fitting the tubular pile is carried out in the same manner as in the first embodiment. do.
In the first and second embodiments, the lower region of the constituent member of the tubular pile 20 into which the detachment prevention member invades is defined as the region in the hole 20H formed in the wall portion 20W of the tubular pile 20. In the third embodiment shown in FIGS. 14 to 16, the convex portion 20R provided on the inner peripheral surface of the tubular pile 20 shown in FIG. The lower area of. That is, the constituent member of the tubular pile 20 that is invaded into the lower region by the detachment preventing member 43c is the convex portion 20R.
For example, as shown in FIG. 14, the detachment preventing member 43c is configured in a hook shape in which the tip thereof can be inserted under the convex portion 20R.
The work operation in this embodiment is the same as that in the first embodiment. As shown in FIG. 16, a state in which the tubular pile 20 is gripped by the clamp device 41 and the detachment preventing member 43c invades the lower region of the convex portion 20R to prevent the clamp device 41 from detaching from the tubular pile 20. Will be. If only the downing device 40C is directly lifted by the crane in this state, the downing device 40C and the tubular pile 20 are transported to the lifting chuck device 36 in a safe state in which the tubular pile 20 is prevented from falling off by the detachment preventing member 43a. can do.

第３実施形態の打ち下げ装置４０Ｃによれば、離脱防止策のために管状杭２０に孔（２０Ｈ）を設けることは回避される。
なお、第３実施形態の打ち下げ装置４０Ｃにおける離脱阻止部材４３ｃにあっても、上記第２実施形態のように独立したシリンダ装置を設けて実施してもよい。 According to the downhill device 40C of the third embodiment, it is avoided to provide a hole (20H) in the tubular pile 20 as a measure to prevent detachment.
In addition, even in the detachment prevention member 43c in the downhill device 40C of the third embodiment, an independent cylinder device may be provided and carried out as in the second embodiment.

以上の第１から第３のいずれかの実施形態によれば、管状杭２０と打ち下げ装置４０Ａ（４０Ｂ，４０Ｃ）の連結体を吊り上げて杭圧入機３０のチャック装置３６に把持させた状態に建て込み、杭圧入機３０により管状杭２０を地盤に圧入させるに際して、吊り上げ時、離脱阻止部材４３ａ（４３ｃ）により管状杭２０が打ち下げ装置４０Ａ（４０Ｂ，４０Ｃ）から分離、落下することを防止することができる。
また、管状杭２０の外周面に固設された吊り用連結部２４（図１０参照）は不要であるので当該吊り用連結部２４の切断作業を無くすことができ、吊り上げ時の離脱阻止策によって杭圧入工程に非効率を強いること避けることができる。
管状杭２０の外周面の吊り用連結部２４の設置を廃止することで、上述した作業者がチャック装置３６に登り当該吊り用連結部２４を切断する作業は無くなり、その作業のために圧入作業が中断することもないため、管状杭の圧入工程を安全かつ効率的に実行することができる。
また、離脱阻止部材４３ａ（４３ｃ）を離脱阻止位置に配置したり、離脱阻止解除位置に配置したりすることは、遠隔操作により駆動制御可能であり、これについても作業者が離脱阻止部材４３ａ（４３ｃ）を直接操作する必要がなく、打ち下げ装置と管状杭の連結から、吊り上げ及び圧入を経て、打ち下げ装置分離回収までの工程を安全かつ効率的に実行することができる。 According to any one of the first to third embodiments described above, the connecting body of the tubular pile 20 and the downing device 40A (40B, 40C) is lifted and held by the chuck device 36 of the pile press-fitting machine 30. When the tubular pile 20 is press-fitted into the ground by the built-in pile press-fitting machine 30, the detachment prevention member 43a (43c) prevents the tubular pile 20 from being separated from the down device 40A (40B, 40C) and falling during lifting. can do.
Further, since the suspension connecting portion 24 (see FIG. 10) fixedly fixed to the outer peripheral surface of the tubular pile 20 is unnecessary, the cutting work of the suspending connecting portion 24 can be eliminated, and the detachment prevention measure at the time of lifting can be used. It is possible to avoid forcing inefficiency in the pile press-fitting process.
By abolishing the installation of the hanging connecting portion 24 on the outer peripheral surface of the tubular pile 20, the work of the above-mentioned worker climbing the chuck device 36 and cutting the hanging connecting portion 24 is eliminated, and the press-fitting work is performed for that work. Is not interrupted, so that the press-fitting process of the tubular pile can be performed safely and efficiently.
Further, arranging the detachment prevention member 43a (43c) at the detachment prevention position or the detachment prevention release position can be driven and controlled by remote control, and the operator can also place the detachment prevention member 43a (43a). It is not necessary to directly operate 43c), and the process from the connection between the downhill device and the tubular pile, the lifting and press-fitting, to the separation and recovery of the downhill device can be performed safely and efficiently.

２０ 管状杭
２０Ｈ 孔
２０Ｒ 凸部
２０Ｗ 壁部
３０ 杭圧入機
３５ 昇降機構
３６ チャック装置
４０Ａ 打ち下げ装置（第１実施形態）
４０Ｂ 打ち下げ装置（第２実施形態）
４０Ｃ 打ち下げ装置（第３実施形態）
４１ クランプ装置
４１ａ 押圧部材
４１ｂ シリンダ装置
４２ 本体部
４２ａ 軸方向端面
４３ａ 離脱阻止部材（第１，第２実施形態）
４３ｂ シリンダ装置
４３ｃ 離脱阻止部材（第３実施形態）
４４ 吊り用連結部 20 Tubular pile 20H Hole 20R Convex part 20W Wall part 30 Pile press-fitting machine 35 Elevating mechanism 36 Chuck device 40A Down device (first embodiment)
40B launch device (second embodiment)
40C launch device (third embodiment)
41 Clamping device 41a Pressing member 41b Cylinder device 42 Main body 42a Axial end face 43a Detachment preventing member (first and second embodiments)
43b Cylinder device 43c Detachment prevention member (third embodiment)
44 Suspended connection

Claims (8)

管状杭を延長するように当該管状杭の端部に連結され、杭圧入機のチャック装置に把持されて当該杭圧入機により前記管状杭を地盤に圧入可能にする打ち下げ装置であって、
前記チャック装置に把持され前記管状杭の軸方向端面に当接する軸方向端面を有し、前記管状杭の延長部に相当する本体部と、
前記本体部から軸方向に突設され、拡径・縮径する動作が駆動制御可能で、前記管状杭内に挿入されて拡径することで当該管状杭を把持するクランプ装置と、
前記クランプ装置の前記管状杭内へ挿入方向を下方向として、前記管状杭の構成部材の下方域に侵入することで、前記クランプ装置の管状杭内からの離脱を阻止する離脱阻止部材と、を備え、
前記離脱阻止部材は、前記下方域に侵入する離脱阻止位置と、前記下方域から退避した離脱阻止解除位置とに移動する進退動作が駆動制御可能にされている杭圧入機の打ち下げ装置。 A downhill device that is connected to the end of the tubular pile so as to extend the tubular pile, is gripped by the chuck device of the pile press-fitting machine, and allows the tubular pile to be press-fitted into the ground by the pile press-fitting machine.
A main body portion having an axial end surface that is gripped by the chuck device and abuts on the axial end surface of the tubular pile and corresponds to an extension portion of the tubular pile.
A clamp device that is projected in the axial direction from the main body and can drive and control the operation of expanding and contracting the diameter, and is inserted into the tubular pile to expand the diameter to grip the tubular pile.
A detachment prevention member that prevents the clamp device from being detached from the tubular pile by invading the lower region of the constituent member of the tubular pile with the insertion direction into the tubular pile of the clamp device as a downward direction. Prepare,
The detachment prevention member is a downing device for a pile press-fitting machine in which an advance / retreat operation of moving to a detachment prevention position that enters the lower area and a detachment prevention release position that has been evacuated from the lower area can be driven and controlled. 前記離脱阻止部材は、前記クランプ装置の拡径・縮径する動作に機械的に連動することで、前記進退動作が駆動制御可能にされている請求項１に記載の杭圧入機の打ち下げ装置。 The downing device for a pile press-fitting machine according to claim 1, wherein the detachment preventing member is mechanically interlocked with an operation of expanding / contracting the diameter of the clamp device so that the advance / retreat operation can be driven and controlled. .. 前記管状杭の内周面を押圧して把持する前記クランプ装置の押圧部材と前記離脱阻止部材とが一体である請求項２に記載の杭圧入機の打ち下げ装置。 The downing device for a pile press-fitting machine according to claim 2, wherein the pressing member of the clamp device that presses and grips the inner peripheral surface of the tubular pile and the detachment preventing member are integrated. 前記離脱阻止部材は、前記クランプ装置の拡径・縮径動作とは独立して、前記進退動作が駆動制御可能にされている請求項１に記載の杭圧入機の打ち下げ装置。 The drop-down device for a pile press-fitting machine according to claim 1, wherein the detachment prevention member is drive-controllable for the advance / retreat operation independently of the diameter-expanding / reducing operation of the clamp device. 前記下方域は、前記管状杭の壁部に穿設された孔の中の領域である請求項１から請求項４のうちいずれか一に記載の杭圧入機の打ち下げ装置。 The downing device for a pile press-fitting machine according to any one of claims 1 to 4, wherein the lower region is an area in a hole formed in a wall portion of the tubular pile. 前記構成部材は、前記管状杭の内周面に設けられた凸部である請求項１から請求項４のうちいずれか一に記載の杭圧入機の打ち下げ装置。 The falling device for a pile press-fitting machine according to any one of claims 1 to 4, wherein the constituent member is a convex portion provided on the inner peripheral surface of the tubular pile. 前記進退動作は、前記管状杭の径方向に沿った進退動作を伴う請求項１から請求項６のうちいずれか一に記載の杭圧入機の打ち下げ装置。 The downing device for a pile press-fitting machine according to any one of claims 1 to 6, wherein the advancing / retreating operation is accompanied by an advancing / retreating operation along the radial direction of the tubular pile. 前記離脱阻止部材は、前記クランプ装置とともに前記管状杭内に挿入され、前記離脱阻止解除位置においては前記下方域より前記管状杭の径方向内側に退避する請求項７に記載の杭圧入機の打ち下げ装置。 The driving of the pile press-fitting machine according to claim 7, wherein the detachment prevention member is inserted into the tubular pile together with the clamp device, and at the detachment prevention release position, the pile press-fitting machine retracts from the lower area inward in the radial direction of the tubular pile. Lowering device.
JP2020177023A 2020-10-22 2020-10-22 Driving-down device for pile press-fitting machine Pending JP2022068393A (en)

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