JP2022099883A - Existing pile extraction device - Google Patents

Existing pile extraction device Download PDF

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JP2022099883A
JP2022099883A JP2020213942A JP2020213942A JP2022099883A JP 2022099883 A JP2022099883 A JP 2022099883A JP 2020213942 A JP2020213942 A JP 2020213942A JP 2020213942 A JP2020213942 A JP 2020213942A JP 2022099883 A JP2022099883 A JP 2022099883A
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casing
existing pile
hydraulic cylinder
chuck claw
extraction device
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龍貴 松田
Tatsuki Matsuda
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DAITO ENGINEERING KK
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DAITO ENGINEERING KK
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Abstract

To provide an existing pile extraction device that can reduce the weight of the device and simplify the structure.SOLUTION: The present invention comprises a cylindrical casing having an inner diameter larger than the maximum outer diameter of an existing pile, and a chuck claw 3 attached to a lower part of a casing so as to protrude into the casing driven by a hydraulic cylinder 2. The casing is formed by connecting a plurality of casing portions, and the hydraulic cylinder 2 and the chuck claw 3 are provided on the outer peripheral portion of the casing portion 11 located at the tip of the casing.SELECTED DRAWING: Figure 3

Description

本発明は、地中に残存する既設杭を引き抜くために用いられる既設杭引き抜き装置に関するものである。 The present invention relates to an existing pile pulling device used for pulling out an existing pile remaining in the ground.

建築物や土木構造物等を構築するとき、その基礎を構成するために地中に既成杭が打ち込まれて埋設される。
このため、建築物や土木構造物等の建て替え等を行うときには、古い構築物を解体撤去するだけでなく、地中に埋設されている既成杭を撤去する必要がある。 When constructing buildings, civil engineering structures, etc., prefabricated piles are driven into the ground and buried to form the foundation.
For this reason, when rebuilding buildings, civil engineering structures, etc., it is necessary not only to dismantle and remove old structures, but also to remove existing piles buried in the ground.

この地中に埋設されている既成杭を撤去するために、既設杭引き抜き装置が汎用されている（例えば、特許文献１～２参照。）。 In order to remove the existing piles buried in the ground, the existing pile extraction device is widely used (see, for example, Patent Documents 1 and 2).

この既設杭引き抜き装置は、例えば、図１～図２に示すように、地中に埋設されている既設杭Ｐの最大外径よりも大きい内径をもつ円筒状のケーシング１と、このケーシング１の下部に、油圧シリンダ２による駆動でケーシング１内に突出するように取り付けられたチャック爪３とを備え、ケーシング１を地盤に挿入して、ケーシング１内に既設杭Ｐを配置し、チャック爪３をケーシング１内へ突出させて、チャック爪３でケーシング１の既設杭Ｐの下端を支持した状態でケーシング１を引き抜くことにより、既設杭Ｐをケーシング１と共に引き抜くようにしている。 As shown in FIGS. 1 and 2, for example, the existing pile pulling device includes a cylindrical casing 1 having an inner diameter larger than the maximum outer diameter of the existing pile P buried in the ground, and the casing 1. A chuck claw 3 attached to the lower part so as to protrude into the casing 1 driven by a hydraulic cylinder 2 is provided, the casing 1 is inserted into the ground, an existing pile P is arranged in the casing 1, and the chuck claw 3 is provided. The existing pile P is pulled out together with the casing 1 by projecting the casing 1 into the casing 1 and pulling out the casing 1 in a state where the chuck claw 3 supports the lower end of the existing pile P of the casing 1.

ところで、従来の既設杭引き抜き装置は、地中に埋設されている既設杭Ｐの長さや埋設深さに対応するために、ケーシング１を、複数のケーシング部１１、１２、１３、１４、１５、１６を連結してなるとともに、ケーシング１の先端（下端）に位置するケーシング部１６の外周部に、チャック爪３を、ケーシング１の基端（上端）に位置するケーシング部１１の外周部に、油圧シリンダ２を、それぞれ備えるようにし、油圧シリンダ２とチャック爪３をロッド部材４で接続することで、油圧シリンダ２の駆動力を、ロッド部材４を介して、チャック爪３に伝達するようにしていた。 By the way, in the conventional existing pile pulling device, the casing 1 is provided with a plurality of casing portions 11, 12, 13, 14, 15, in order to correspond to the length and the burial depth of the existing pile P buried in the ground. The chuck claws 3 are connected to the outer peripheral portion of the casing portion 16 located at the tip end (lower end) of the casing 1 and the chuck claw 3 is attached to the outer peripheral portion of the casing portion 11 located at the base end (upper end) of the casing 1. Each of the hydraulic cylinders 2 is provided, and the hydraulic cylinder 2 and the chuck claw 3 are connected by the rod member 4, so that the driving force of the hydraulic cylinder 2 is transmitted to the chuck claw 3 via the rod member 4. It was.

そして、油圧シリンダ２の駆動力をチャック爪３に伝達するロッド部材４は、チャック爪３を押し操作するものであるため、剛性を必要とし、このため、装置が重量化するとともに、ロッド部材４を摺動可能に案内するガイド部材５の構造が複雑になるという問題があった。 Since the rod member 4 that transmits the driving force of the hydraulic cylinder 2 to the chuck claw 3 is operated by pushing the chuck claw 3, rigidity is required. Therefore, the weight of the device is increased and the rod member 4 is increased in weight. There is a problem that the structure of the guide member 5 that guides the guide member 5 so as to be slidable becomes complicated.

特許第５２０３５３９号公報Japanese Patent No. 5203339 特許第３７８０２９３号公報Japanese Patent No. 3780293

本発明は、上記従来の既設杭引き抜き装置の有する問題点に鑑み、油圧シリンダの駆動力をチャック爪に伝達するロッド部材及びそれを案内するガイド部材を省略することで、装置の軽量化と構造の簡略化を図ることができるようにした既設杭引き抜き装置を提供することを目的とする。 In view of the problems of the conventional existing pile pulling device, the present invention eliminates the rod member for transmitting the driving force of the hydraulic cylinder to the chuck claw and the guide member for guiding the rod member, thereby reducing the weight and structure of the device. It is an object of the present invention to provide an existing pile extraction device capable of simplifying the above.

上記目的を達成するため、本発明の既設杭引き抜き装置は、既設杭の最大外径よりも大きい内径をもつ円筒状のケーシングと、このケーシングの下部に、油圧シリンダによる駆動でケーシング内に突出するように取り付けられたチャック爪とを備えるようにした既設杭の引き抜き装置において、ケーシングが、複数のケーシング部を連結してなるとともに、該ケーシングの先端に位置するケーシング部の外周部に、油圧シリンダ及びチャック爪を備えるようにしたことを特徴とする。 In order to achieve the above object, the existing pile extraction device of the present invention has a cylindrical casing having an inner diameter larger than the maximum outer diameter of the existing pile, and a lower portion of the casing protruding into the casing driven by a hydraulic cylinder. In the existing pile pulling device provided with the chuck claws attached as described above, the casing is formed by connecting a plurality of casing portions, and a hydraulic cylinder is formed on the outer peripheral portion of the casing portion located at the tip of the casing. It is characterized by being provided with a chuck claw.

本発明の既設杭引き抜き装置によれば、ケーシングの先端に位置するケーシング部の外周部に、油圧シリンダ及びチャック爪を備えるようにすることにより、油圧シリンダの駆動力をチャック爪に伝達するロッド部材及びそれを案内するガイド部材を省略することで、装置の軽量化と構造の簡略化を図ることができる。 According to the existing pile pulling device of the present invention, a rod member that transmits the driving force of the hydraulic cylinder to the chuck claws by providing a hydraulic cylinder and a chuck claw on the outer peripheral portion of the casing portion located at the tip of the casing. By omitting the guide member for guiding the device, the weight of the device can be reduced and the structure can be simplified.

従来の既設杭引き抜き装置を示す全体正面図である。It is an overall front view which shows the conventional existing pile pulling-out device. 同既設杭引き抜き装置のケーシングを示す全体正面図である。It is an overall front view which shows the casing of the existing pile pulling apparatus. 本発明の既設杭引き抜き装置のケーシングの先端に位置するケーシング部を示す正面図である。It is a front view which shows the casing part located at the tip of the casing of the existing pile extraction device of this invention. 同側面図である。It is the same side view. 同底面図である。It is the same bottom view.

以下、本発明の既設杭引き抜き装置の実施の形態を、図面に基づいて説明する。 Hereinafter, embodiments of the existing pile pulling device of the present invention will be described with reference to the drawings.

図３～図５に、本発明の既設杭引き抜き装置の一実施例を示す。
この既設杭引き抜き装置は、図１～図２に示す従来の既設杭引き抜き装置と同様、地中に埋設されている既設杭Ｐの最大外径よりも大きい内径をもつ円筒状のケーシング１と、このケーシング１の下部に、油圧シリンダ２による駆動でケーシング１内に突出するように取り付けられたチャック爪３とを備え、ケーシング１を地盤に挿入して、ケーシング１内に既設杭Ｐを配置し、チャック爪３をケーシング１内へ突出させて、チャック爪３でケーシング１の既設杭Ｐの下端を支持した状態でケーシング１を引き抜くことにより、既設杭Ｐをケーシング１と共に引き抜くようにしたものである。 3 to 5 show an embodiment of the existing pile pulling device of the present invention.
This existing pile extraction device has a cylindrical casing 1 having an inner diameter larger than the maximum outer diameter of the existing pile P buried in the ground, similar to the conventional existing pile extraction devices shown in FIGS. 1 and 2. A chuck claw 3 attached to the lower part of the casing 1 so as to project into the casing 1 driven by a hydraulic cylinder 2 is provided, the casing 1 is inserted into the ground, and an existing pile P is arranged in the casing 1. The chuck claw 3 is projected into the casing 1, and the existing pile P is pulled out together with the casing 1 by pulling out the casing 1 while the chuck claw 3 supports the lower end of the existing pile P of the casing 1. be.

そして、この既設杭引き抜き装置は、ケーシング１が、複数のケーシング部１１、１２、１３、１４、１５、１６を連結してなるとともに、図３～図５に示すように、ケーシング１の先端（下端）に位置するケーシング部１１の外周部に、油圧シリンダ２及びチャック爪３を備えるようにしている。
なお、ケーシング部１１、１２、１３、１４、１５、１６の連結は、回転嵌合結合、フランジ結合等の任意の結合手段を用いることができる。 In this existing pile pulling device, the casing 1 is formed by connecting a plurality of casing portions 11, 12, 13, 14, 15, and 16, and as shown in FIGS. 3 to 5, the tip of the casing 1 (as shown in FIGS. 3 to 5). A hydraulic cylinder 2 and a chuck claw 3 are provided on the outer peripheral portion of the casing portion 11 located at the lower end).
For the connection of the casing portions 11, 12, 13, 14, 15, and 16, any coupling means such as rotary fitting coupling and flange coupling can be used.

油圧シリンダ２及びチャック爪３は、本実施例においては、２組の油圧シリンダ２及びチャック爪３を、ケーシング部１１の外周部の対向位置（１８０°の位置）に設置するようにしているが、図５（ｂ）に示すように、３組（又はそれ以上）の油圧シリンダ２及びチャック爪３を、等角度間隔に設置するようにすることもできる。 In the present embodiment, the hydraulic cylinder 2 and the chuck claw 3 are arranged so that the two sets of the hydraulic cylinder 2 and the chuck claw 3 are installed at opposite positions (180 ° positions) of the outer peripheral portion of the casing portion 11. , As shown in FIG. 5 (b), three sets (or more) of hydraulic cylinders 2 and chuck claws 3 may be installed at equal intervals.

また、油圧シリンダ２とチャック爪３は、油圧シリンダ２のピストンロッドを、連結具８を介して、チャック爪３に接続することで、油圧シリンダ２の駆動力を、チャック爪３に伝達するようにしている（図４の右側は、油圧シリンダ２のピストンロッドを縮め、チャック爪３を収納した状態を、左側は、油圧シリンダ２のピストンロッドを伸ばし、チャック爪３をケーシング１内へ突出させた状態を、それぞれ示す。）。
なお、油圧シリンダ２のピストンロッドを、チャック爪３に直接接続することもできる。
これにより、油圧シリンダ２の駆動力をチャック爪３に伝達するロッド部材４及びそれを案内するガイド部材５を省略することができ、装置の軽量化と構造の簡略化を図ることができる。 Further, the hydraulic cylinder 2 and the chuck claw 3 transmit the driving force of the hydraulic cylinder 2 to the chuck claw 3 by connecting the piston rod of the hydraulic cylinder 2 to the chuck claw 3 via the connector 8. (On the right side of FIG. 4, the piston rod of the hydraulic cylinder 2 is contracted and the chuck claw 3 is stored, and on the left side, the piston rod of the hydraulic cylinder 2 is extended and the chuck claw 3 is projected into the casing 1. The state of each is shown.).
The piston rod of the hydraulic cylinder 2 can also be directly connected to the chuck claw 3.
As a result, the rod member 4 that transmits the driving force of the hydraulic cylinder 2 to the chuck claw 3 and the guide member 5 that guides the rod member 5 can be omitted, and the weight of the device can be reduced and the structure can be simplified.

油圧シリンダ２に対する作動油の供給・排出を行うための給油管（図示省略）には、油圧ホースや金属製の管部材を使用することができ、これをケーシング１の外周面に沿って配設し、必要に応じて、油圧シリンダ２と共に、アングル鋼 （等辺山形鋼）等からなるカバー部材（図示省略）で覆うようにする。
また、ケーシング１の上部には、油圧シリンダ２に対する作動油の供給・排出を行うためのスイベル（図示省略）を配設するようにしている。 A hydraulic hose or a metal pipe member can be used for the oil supply pipe (not shown) for supplying / discharging the hydraulic oil to the hydraulic cylinder 2, and this is arranged along the outer peripheral surface of the casing 1. If necessary, cover the hydraulic cylinder 2 with a cover member (not shown) made of angle steel (equal angle steel) or the like.
Further, a swivel (not shown) for supplying / discharging hydraulic oil to the hydraulic cylinder 2 is arranged on the upper part of the casing 1.

ケーシング部１１には、ケーシング部１１の下端面に、掘削歯６１を設けるとともに、外周面に余堀り掘削歯６２を設けるようにしている。 The casing portion 11 is provided with excavation teeth 61 on the lower end surface of the casing portion 11 and is provided with extra excavation teeth 62 on the outer peripheral surface.

さらに、ケーシング１には、その外周面に沿って、水やベントナイト等の泥土化剤を供給し、切羽に向けて噴出させるための配管７を配設し、配管７の先端に設けたノズル７１をケーシング部１１内に臨ませるようにしている。
配管７は、必要に応じて、ノズル７１と共に、アングル鋼 （等辺山形鋼）等からなるカバー部材７２で覆うようにする。 Further, the casing 1 is provided with a pipe 7 for supplying a mud agent such as water or bentonite along the outer peripheral surface thereof and ejecting it toward the face, and a nozzle 71 provided at the tip of the pipe 7. Is designed to face the inside of the casing portion 11.
If necessary, the pipe 7 is covered with a cover member 72 made of angle steel (equal angle steel) or the like together with the nozzle 71.

この既設杭引き抜き装置は、ケーシング部１１を先端（下端）に取り付けたケーシング１を地盤に挿入して、ケーシング１内に既設杭Ｐを配置し、油圧シリンダ２の駆動力を、ピストンロッドを介して、チャック爪３に直接伝達させることで、チャック爪３をケーシング１内へ突出させて、チャック爪３でケーシング１の既設杭Ｐの下端を支持した状態でケーシング１を引き抜くことにより、既設杭Ｐをケーシング１と共に引き抜くようにする。 In this existing pile pulling device, the casing 1 having the casing portion 11 attached to the tip (lower end) is inserted into the ground, the existing pile P is arranged in the casing 1, and the driving force of the hydraulic cylinder 2 is transmitted via the piston rod. By directly transmitting the chuck claw 3 to the chuck claw 3, the chuck claw 3 is projected into the casing 1, and the casing 1 is pulled out while the chuck claw 3 supports the lower end of the existing pile P of the casing 1. P is pulled out together with the casing 1.

以上、本発明の既設杭引き抜き装置について、その実施例に基づいて説明したが、本発明は上記実施例に記載した構成に限定されるものではなく、その趣旨を逸脱しない範囲において適宜その構成を変更することができるものである。 The existing pile pulling device of the present invention has been described above based on the embodiment thereof, but the present invention is not limited to the configuration described in the above embodiment, and the configuration is appropriately configured as long as the purpose is not deviated. It can be changed.

本発明の既設杭引き抜き装置は、油圧シリンダの駆動力をチャック爪に伝達するロッド部材及びそれを案内するガイド部材を省略することで、装置の軽量化と構造の簡略化を図ることができる特性を有していることから、既設杭引き抜き装置の用途に好適に用いることができる。 The existing pile pulling device of the present invention has a characteristic that the weight of the device can be reduced and the structure can be simplified by omitting the rod member for transmitting the driving force of the hydraulic cylinder to the chuck claw and the guide member for guiding the rod member. Therefore, it can be suitably used for the use of the existing pile extraction device.

１ ケーシング
１１、１２、１３、１４、１５、１６ ケーシング部
２ 油圧シリンダ
３ チャック爪
４ ロッド部材
５ ガイド部材
６１ 掘削歯
６２ 余堀り掘削歯
７ （泥土化剤供給用）配管
８ 連結具
Ｐ 既成杭 1 Casing 11, 12, 13, 14, 15, 16 Casing part 2 Hydraulic cylinder 3 Chuck claw 4 Rod member 5 Guide member 61 Excavation tooth 62 Excavation excavation tooth 7 (For supplying mud agent) Piping 8 Connector P Ready-made Pile

Claims (1)

既設杭の最大外径よりも大きい内径をもつ円筒状のケーシングと、このケーシングの下部に、油圧シリンダによる駆動でケーシング内に突出するように取り付けられたチャック爪とを備えるようにした既設杭の引き抜き装置において、ケーシングが、複数のケーシング部を連結してなるとともに、該ケーシングの先端に位置するケーシング部の外周部に、油圧シリンダ及びチャック爪を備えるようにしたことを特徴とする既設杭の引き抜き装置。 A cylindrical casing having an inner diameter larger than the maximum outer diameter of the existing pile, and a chuck claw attached to the lower part of the casing so as to protrude into the casing driven by a hydraulic cylinder. In the pulling device, the casing is formed by connecting a plurality of casing portions, and a hydraulic cylinder and a chuck claw are provided on the outer peripheral portion of the casing portion located at the tip of the casing. Extraction device.
JP2020213942A 2020-12-23 2020-12-23 Existing pile extraction device Pending JP2022099883A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7335665B1 (en) * 2023-04-14 2023-08-30 横浜ライト工業株式会社 casing and casing head

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5585734A (en) * 1978-12-25 1980-06-28 Ohbayashigumi Ltd Extracting method for existing pile
JPS55132814A (en) * 1979-04-03 1980-10-16 Sanwa Kizai Co Ltd Pulling-out method for pile
JP2002138474A (en) * 2000-10-27 2002-05-14 Aasupikku Kogyo Kk Method and device for cutting and pulling out existing pile
JP2006097275A (en) * 2004-09-28 2006-04-13 Yoshio Matsumoto Existing pile cutting/removing device and existing pile cutting/removing method
JP2006348709A (en) * 2005-07-05 2006-12-28 Hiroshi Kataoka Removing apparatus of underground obstacle and removing method of underground obstacle using the same
JP2014034805A (en) * 2012-08-08 2014-02-24 Marushin:Kk Existing pile pull-out device
JP2019194422A (en) * 2018-04-27 2019-11-07 有限会社マンダイクレーン Pulling device for existing pile

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5585734A (en) * 1978-12-25 1980-06-28 Ohbayashigumi Ltd Extracting method for existing pile
JPS55132814A (en) * 1979-04-03 1980-10-16 Sanwa Kizai Co Ltd Pulling-out method for pile
JP2002138474A (en) * 2000-10-27 2002-05-14 Aasupikku Kogyo Kk Method and device for cutting and pulling out existing pile
JP2006097275A (en) * 2004-09-28 2006-04-13 Yoshio Matsumoto Existing pile cutting/removing device and existing pile cutting/removing method
JP2006348709A (en) * 2005-07-05 2006-12-28 Hiroshi Kataoka Removing apparatus of underground obstacle and removing method of underground obstacle using the same
JP2014034805A (en) * 2012-08-08 2014-02-24 Marushin:Kk Existing pile pull-out device
JP2019194422A (en) * 2018-04-27 2019-11-07 有限会社マンダイクレーン Pulling device for existing pile

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7335665B1 (en) * 2023-04-14 2023-08-30 横浜ライト工業株式会社 casing and casing head

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