JP4993582B2

JP4993582B2 - Packer device and chemical injection method using the same

Info

Publication number: JP4993582B2
Application number: JP2007037495A
Authority: JP
Inventors: 伸行藤沢; 信夫柳橋
Original assignee: ライト工業株式会社
Priority date: 2006-03-31
Filing date: 2007-02-19
Publication date: 2012-08-08
Anticipated expiration: 2027-02-19
Also published as: JP2007291835A

Description

本発明は、パッカー装置及び薬液注入工法に関するものである。より詳しくは、地盤に挿入された有孔管内に薬液を注入し、この注入薬液を外管の孔を通して地盤中に吐き出す工法において用いられる、外管の先端開口を閉塞するパッカー装置、及びこのパッカー装置を用いた薬液注入工法に関するものである。 The present invention relates to a packer device and a chemical solution injection method. More specifically, a packer device for closing a distal end opening of an outer tube and a packer device used in a method of injecting a chemical into a perforated tube inserted into the ground and discharging the injected chemical into the ground through a hole in the outer tube, and the packer The present invention relates to a chemical injection method using an apparatus.

パッカー装置の先行技術として、図１に示すように、外管（有孔管）Ｐ内に収まる径の筒体１００Ａと、この筒体１００Ａ内に少なくともその先端部が挿入される挿入体１００Ｂと、を主に有するパッカー装置１００がある。これは、このパッカー装置１００を外管Ｐの先端部分に設置した状態で、先端部に打撃体１０１Ａが備わるロッド１０１で、挿入体１００Ｂを打撃し、筒体１００Ａ内に、挿入体１００Ｂの先端部が挿入し、筒体１００Ａを径外方に押し広げ、筒体１００Ａの周壁面を外管Ｐの内壁面に当接させて外管の先端部分の止水を図るものである（例えば、特許文献１参照）。
特開２００５−３３０６４８号公報 As a prior art of the packer device, as shown in FIG. 1, a cylindrical body 100A having a diameter that can be accommodated in an outer tube (perforated pipe) P, and an inserted body 100B into which at least a tip portion thereof is inserted into the cylindrical body 100A, There is a packer device 100 mainly having This is because in a state where the packer device 100 is installed at the distal end portion of the outer tube P, the rod 101 provided with the impacting body 101A at the distal end portion strikes the insertion body 100B, and the distal end of the insertion body 100B is placed inside the cylinder 100A. Part is inserted, and the cylindrical body 100A is pushed radially outward, and the peripheral wall surface of the cylindrical body 100A is brought into contact with the inner wall surface of the outer pipe P to stop water at the distal end portion of the outer pipe (for example, Patent Document 1).
JP 2005-330648 A

しかしながら、上記発明では、ロッド１０１で打撃を加えなければならないため、深度１２．５ｍ程度が限界であるという問題点があった。
そこで、本発明の主たる課題は、長深度でも確実に先端部分に設置でき、かつ確実に先端部分で止水を図ることができるパッカー装置及びこれを用いた薬液注入工法を提供することにある。 However, the above-described invention has a problem that the depth is about 12.5 m because the rod 101 must be hit.
Then, the main subject of this invention is providing the packer apparatus which can be reliably installed in a front-end | tip part even in long depth, and can aim at water stop in a front-end | tip part reliably, and a chemical | medical solution injection | pouring method using the same.

上記課題を解決した本発明は、次のとおりである。
＜請求項１記載の発明＞
請求項１記載の発明は、地盤に挿入された有孔管内に薬液を注入し、この注入薬液を前記有孔管の孔を通して地盤中に吐出する薬液注入工法において用いられる、前記有孔管の先端開口を閉塞するパッカー装置であって、逆止弁が取付けられたシリンダー部材と、このシリンダー部材内に流体を供給すると共に、シリンダー部材に嵌脱自在なホース端末アタッチメントと、シリンダー部材内を摺動可能なピストン部材と、このピストン部材によって軸方向に押圧される環状の弾性体で形成されたパッカー本体と、ピストン部材の軸方向の摺動に連動して移動し、ホース端末アタッチメントとシリンダー部材との嵌合を解除する解除手段と、を備え、前記ホース端末アタッチメントを取付けた流体供給ホースからシリンダー部材内に流体を供給して、パッカー本体を軸心方向に圧縮し、半径方向に張出させ前記有孔管の内周面に当接して液密を図り、先端開口を閉塞し、この先端開口の閉塞の際に、パッカー本体が前記有孔管の内周面への当接にあわせて、ホース端末アタッチメントとシリンダー部材との嵌合を解除する構成とされた、ことを特徴とするパッカー装置である。 The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
The invention according to claim 1 is used in a chemical injection method for injecting a chemical into a perforated pipe inserted into the ground and discharging the injected chemical into the ground through a hole in the perforated pipe. A packer device that closes the tip opening, a cylinder member having a check valve attached thereto, a fluid that is supplied into the cylinder member, and a hose terminal attachment that can be freely attached to and detached from the cylinder member, and a slide in the cylinder member. A movable piston member, a packer body formed of an annular elastic body pressed in the axial direction by the piston member, and a hose terminal attachment and a cylinder member that move in conjunction with the axial sliding of the piston member And a release means for releasing the fitting to the cylinder member, and fluid is supplied into the cylinder member from the fluid supply hose to which the hose terminal attachment is attached. Then, the packer body is compressed in the axial direction, extended in the radial direction, abuts against the inner peripheral surface of the perforated tube to achieve liquid tightness, closes the tip opening, and closes the tip opening. The packer device is characterized in that the packer body is configured to release the fitting between the hose terminal attachment and the cylinder member in accordance with the contact of the perforated tube with the inner peripheral surface.

（作用効果）
シリンダー部材内に流体を供給して、パッカー本体を軸心方向に圧縮し、半径方向に張出させ前記有孔管の内周面に当接して液密を図り先端開口を閉塞したのに合わせて、ホース端末アタッチメントとシリンダー部材との嵌合を解除することにより、長深度（例えば、５０ｍ）でも確実にホース端末アタッチメントを含めて流体供給ホースを回収することができる。 (Function and effect)
Fluid is supplied into the cylinder member, the packer body is compressed in the axial direction, and is extended in the radial direction to contact the inner peripheral surface of the perforated tube to achieve fluid tightness and close the tip opening. By releasing the fitting between the hose terminal attachment and the cylinder member, the fluid supply hose including the hose terminal attachment can be reliably recovered even at a long depth (for example, 50 m).

＜請求項２記載の発明＞
請求項２記載の発明は、地盤に挿入された有孔管内に薬液を注入し、この注入薬液を前記有孔管の孔を通して地盤中に吐出する薬液注入工法において用いられる、前記有孔管の先端開口を閉塞するパッカー装置であって、該パッカー装置は、先端開口を閉塞するパッカー部材と、このパッカー部材に嵌脱自在なシリンダー部材と、を備え、シリンダー部材は、流体を供給する流体供給ホースの先端に取付けられる二重管構造のホース端末アタッチメントと、該ホース端末アタッチメントに取付けられ、このホース端末アタッチメント外管部又は内管部のいずれか一方の管部からの流体が内部に供給されるシリンダー本体と、このシリンダー本体に内装され、かつ前記ホース端末アタッチメントの他方の管部に接続された内装管と、前記シリンダー本体内に供給された流体によりシリンダー本体内を摺動可能なピストン部材と、を有し、パッカー部材は、前記シリンダー部材の内装管に取付けられたカプラーにより、該内装管に着脱自在な連結アタッチメントと、前記ピストン部材によって軸方向に押圧される環状の弾性体で形成されたパッカー本体と、このパッカー本体が押圧されることによりパッカー本体の内周部分に挿入され、この挿入によりパッカー本体を半径方向に張出させる挿入部材と、を有し、前記連結アタッチメントは、シリンダー部材の前記カプラーに着脱自在で、かつ内装管からの流体が導かれる連結管部と、この連結管部の外周を所定の間隔をもって同芯状に覆う連結アタッチメント外管部と、連結管部と連結アタッチメント外管部との間に摺動可能に嵌合され、かつ前記カプラーを押圧可能な押圧部と、を有し、前記シリンダー部材と前記パッカー部材との連結解除は、前記連結管部内に供給された流体が連結管部と連結アタッチメント外管部との間に流れ、この流体が押圧部を押圧し、この押圧部が前記カプラーを押圧することにより行なわれる構成とされた、ことを特徴とするパッカー装置である。 <Invention of Claim 2>
The invention according to claim 2 is used in a method for injecting a chemical into a perforated pipe inserted into the ground and discharging the injected chemical into the ground through a hole in the perforated pipe. A packer device that closes a tip opening, the packer device comprising a packer member that closes the tip opening, and a cylinder member that is freely detachable from the packer member. A hose end attachment with a double pipe structure attached to the tip of the hose, and attached to the hose end attachment, the fluid from either the outer pipe portion or the inner pipe portion of the hose end attachment is supplied to the inside. A cylinder body, an interior pipe that is internally attached to the cylinder body and connected to the other pipe portion of the hose terminal attachment, and the cylinder -A piston member slidable in the cylinder body by the fluid supplied into the body, and the packer member is detachably connected to the interior pipe by a coupler attached to the interior pipe of the cylinder member An attachment, a packer body formed of an annular elastic body that is pressed in the axial direction by the piston member, and the packer body is inserted into the inner peripheral portion of the packer body by being pressed. An insertion member extending in a radial direction, and the connection attachment is detachable to the coupler of the cylinder member and a connection pipe part through which a fluid from the interior pipe is guided, and an outer periphery of the connection pipe part. The connecting attachment outer pipe part covering the concentric shape with a predetermined interval, and the connecting pipe part and the connecting attachment outer pipe part are slidably fitted. And the pressing part capable of pressing the coupler, and the release of the connection between the cylinder member and the packer member is performed by the fluid supplied into the connecting pipe part between the connecting pipe part and the connecting attachment outer pipe part. The packer apparatus is characterized in that the fluid flows in between, the fluid presses the pressing portion, and the pressing portion presses the coupler.

（作用効果）
パッカー本体を半径方向に張出させる工程とシリンダー部材とパッカー部材との連結解除工程は、ホース端末アタッチメントに流体を供給することで行われるが、それぞれの工程は外管部及び内管部からなるホース端末アタッチメントの別々の経路に流体を供給することにより行なわれる（例えば、一方の工程で外管部に流体を供給する場合には、他方の工程では内管部に流体を供給する）。そのため、挿入部材をパッカー本体の内周部分に挿入する挿入量（長さ）とカプラーを押圧する押し込み量（長さ）とを別々に設定することができ、より確実にパッカー本体を半径方向に張出させ前記有孔管の内周面に当接させることができ、液密を図って先端開口を閉塞することができる。 (Function and effect)
The process of extending the packer body in the radial direction and the process of releasing the connection between the cylinder member and the packer member are performed by supplying a fluid to the hose terminal attachment. This is performed by supplying fluid to separate paths of the hose terminal attachment (for example, when supplying fluid to the outer tube in one step, supply fluid to the inner tube in the other step). Therefore, the insertion amount (length) for inserting the insertion member into the inner peripheral portion of the packer main body and the push amount (length) for pressing the coupler can be set separately, and the packer main body can be set more reliably in the radial direction. It can be extended and brought into contact with the inner peripheral surface of the perforated tube, and the tip opening can be closed in a liquid-tight manner.

＜請求項３記載の発明＞
請求項３記載の発明は、前記流体供給ホースで押し込みながら、前記有孔管の先端への挿入を行う構成とされた、請求項１又は２記載のパッカー装置である。 <Invention of Claim 3>
The invention according to claim 3 is the packer device according to claim 1 or 2, wherein the packer device is configured to insert into the tip of the perforated pipe while being pushed in by the fluid supply hose.

（作用効果）
また、流体供給ホースで押し込みながら、有孔管の先端への挿入を行う構成とすることにより、長深度でも確実に先端部分に設置でき、かつ確実に先端部分で止水を図ることができる。 (Function and effect)
In addition, by adopting a configuration in which the perforated tube is inserted into the distal end while being pushed in with the fluid supply hose, it can be reliably installed at the distal end portion even at a long depth, and water can be reliably stopped at the distal end portion.

＜請求項４記載の発明＞
請求項４記載の発明は、パッカー装置を用いて、地盤に挿入された有孔管内の先端開口を閉塞し、該有孔管内に薬液を注入し、この注入薬液を前記有孔管の孔を通して地盤中に吐出する薬液注入工法であって、前記パッカー装置は、逆止弁が取付けられたシリンダー部材と、このシリンダー部材内に流体を供給すると共に、シリンダー部材に嵌脱自在なホース端末アタッチメントと、シリンダー部材内を摺動可能なピストン部材と、このピストン部材によって軸方向に押圧される環状の弾性体で形成されたパッカー本体と、ピストン部材の軸方向の摺動に連動して移動し、ホース端末アタッチメントとシリンダー部材との嵌合を解除する解除手段と、を備え、前記パッカー装置を前記有孔管内の先端まで挿入し、シリンダー部材内に流体を供給して、パッカー本体を軸心方向に圧縮し、半径方向に張出させ前記有孔管の内周面に当接して液密を図り、先端開口を閉塞し、先端開口を閉塞した後に、ホース端末アタッチメントとシリンダー部材との嵌合を解除する、ことを特徴とする薬液注入工法である。 <Invention of Claim 4>
The invention according to claim 4 uses the packer device to close the tip opening in the perforated tube inserted into the ground, inject the chemical into the perforated tube, and pass the injected medicinal solution through the hole of the perforated tube. A chemical liquid injection method for discharging into the ground, wherein the packer device includes a cylinder member having a check valve attached thereto, a fluid supplied into the cylinder member, and a hose terminal attachment that is detachable from the cylinder member. , A piston member slidable in the cylinder member, a packer body formed of an annular elastic body pressed in the axial direction by the piston member, and moved in conjunction with the axial sliding of the piston member, Release means for releasing the fitting between the hose terminal attachment and the cylinder member, and the packer device is inserted to the tip of the perforated pipe to supply fluid into the cylinder member. Then, the packer body is compressed in the axial direction, extended in the radial direction, brought into contact with the inner peripheral surface of the perforated tube to achieve liquid-tightness, the tip opening is closed, the tip opening is closed, and the hose The chemical solution injection method is characterized in that the fitting between the terminal attachment and the cylinder member is released.

＜請求項５記載の発明＞
請求項５記載の発明は、パッカー装置を用いて、地盤に挿入された有孔管内の先端開口を閉塞し、該有孔管内に薬液を注入し、この注入薬液を前記有孔管の孔を通して地盤中に吐出する薬液注入工法であって、前記パッカー装置は、先端開口を閉塞するパッカー部材と、このパッカー部材に嵌脱自在なシリンダー部材と、を備え、シリンダー部材は、流体を供給する流体供給ホースの先端に取付けられる二重管構造のホース端末アタッチメントと、該ホース端末アタッチメントに取付けられ、このホース端末アタッチメント外管部又は内管部のいずれか一方の管部からの流体が内部に供給されるシリンダー本体と、このシリンダー本体に内装され、かつ前記ホース端末アタッチメントの他方の管部に接続された内装管と、前記シリンダー本体内に供給された流体によりシリンダー本体内を摺動可能なピストン部材と、を有し、パッカー部材は、前記シリンダー部材の内装管に取付けられたカプラーにより、該内装管に着脱自在な連結アタッチメントと、前記ピストン部材によって軸方向に押圧される環状の弾性体で形成されたパッカー本体と、このパッカー本体が押圧されることによりパッカー本体の内周部分に挿入され、この挿入によりパッカー本体を半径方向に張出させる挿入部材と、を有し、前記連結アタッチメントは、シリンダー部材の前記カプラーに着脱自在で、かつ内装管からの流体が導かれる連結管部と、この連結管部の外周を所定の間隔をもって同芯状に覆う連結アタッチメント外管部と、連結管部と連結アタッチメント外管部との間に摺動可能に嵌合され、かつ前記カプラーを押圧可能な押圧部と、を有し、前記パッカー装置を前記有孔管内の先端まで挿入し、前記ホース端末アタッチメント外管部又は内管部のいずれか一方の管部からの流体を供給して、前記パッカー本体を軸心方向に押圧させて前記挿入部材をパッカー本体の内周部分に挿入し、パッカー本体を半径方向に張出させ前記有孔管の内周面に当接して液密を図り、先端開口を閉塞し、先端開口を閉塞した後に、前記ホース端末アタッチメントの他方の管部から流体を供給して、前記押圧部を介して前記カプラーを押圧することにより前記パッカー部材と前記シリンダー部材との嵌合を解除する、ことを特徴とする薬液注入工法である。 <Invention of Claim 5>
The invention according to claim 5 uses the packer device to close the tip opening in the perforated tube inserted into the ground, inject the chemical into the perforated tube, and pass the injected medicinal solution through the hole of the perforated tube. A chemical liquid injection method for discharging into the ground, wherein the packer device includes a packer member that closes a tip opening, and a cylinder member that is detachable from the packer member, and the cylinder member is a fluid that supplies fluid. A hose end attachment with a double pipe structure attached to the tip of the supply hose, and attached to the hose end attachment, the fluid from either the outer pipe portion or the inner pipe portion of the hose end attachment is supplied to the inside. A cylinder body, an interior pipe that is internally attached to the cylinder body and connected to the other pipe portion of the hose terminal attachment, and the cylinder body A piston member that is slidable in the cylinder body by the fluid supplied to the cylinder body, and the packer member is detachably connected to the inner pipe by a coupler attached to the inner pipe of the cylinder member; A packer body formed of an annular elastic body that is pressed in the axial direction by the piston member, and the packer body is inserted into the inner peripheral portion of the packer body by being pressed. An insertion member that projects, and the connection attachment is detachable from the coupler of the cylinder member and fluid from the inner pipe is guided, and an outer periphery of the connection pipe portion is spaced at a predetermined interval. A connecting attachment outer pipe portion covering concentrically with the connecting pipe portion and the connecting attachment outer pipe portion slidably fitted, and A pressing portion capable of pressing the coupler, and the packer device is inserted to the tip in the perforated tube, and fluid from either the outer tube portion or the inner tube portion of the hose terminal attachment is inserted. Supply, press the packer body in the axial direction, insert the insertion member into the inner peripheral portion of the packer body, project the packer body in the radial direction, and contact the inner peripheral surface of the perforated pipe The packer member is formed by liquid-tightening, closing the tip opening, closing the tip opening, and then supplying fluid from the other pipe portion of the hose terminal attachment and pressing the coupler via the pressing portion. And the cylinder member is released from the fitting.

本発明によれば、長深度でも確実に先端部分に設置でき、かつ確実に先端部分で止水を図ることができる等の利点がもたらされる。 According to the present invention, there are advantages such that it can be reliably installed at the tip portion even at a long depth, and water can be reliably stopped at the tip portion.

以下、図１乃至図５に基づき本発明の実施形態１を、図６乃至図１４に基づき本発明の実施形態２を説明する。
＜パッカー装置の構成（実施形態１）＞
本発明に係るパッカー装置１は、地盤に挿入された外管（有孔管）内に薬液を注入し、この注入薬液を外管の孔を通して地盤中に吐出する薬液注入工法において用いられる、外管Ｐの先端開口を閉塞する装置である。 Hereinafter, a first embodiment of the present invention will be described based on FIGS. 1 to 5, and a second embodiment of the present invention will be described based on FIGS.
<Configuration of Packer Device (Embodiment 1)>
The packer device 1 according to the present invention is used in a chemical solution injection method for injecting a chemical solution into an outer tube (a perforated tube) inserted into the ground and discharging the injected chemical solution into the ground through a hole in the outer tube. This is a device for closing the tip opening of the tube P.

このパッカー装置１は、図２乃至５に示すように、逆止弁（図示せず）が取付けられたシリンダー部材２と、このシリンダー部材２内に流体を供給すると共に、シリンダー部材２に嵌脱自在なホース端末アタッチメント（スリーブ）３と、シリンダー部材２内を摺動可能なピストン部材４と、このピストン部材４によって軸方向に押圧される環状の弾性体で形成されたパッカー本体５と、ピストン部材４の軸方向の摺動に連動して移動し、ホース端末アタッチメント３とシリンダー部材２との嵌合を解除する解除手段と、を備えている。 As shown in FIGS. 2 to 5, the packer device 1 includes a cylinder member 2 to which a check valve (not shown) is attached, supplies fluid into the cylinder member 2, and is fitted into and removed from the cylinder member 2. A flexible hose terminal attachment (sleeve) 3, a piston member 4 slidable in the cylinder member 2, a packer body 5 formed of an annular elastic body that is axially pressed by the piston member 4, and a piston And a release unit that moves in conjunction with the axial sliding of the member 4 and releases the fitting between the hose terminal attachment 3 and the cylinder member 2.

シリンダー部材２は、図３に示すように、その内部に流体が供給されるシリンダー本体２１と、このシリンダー本体２１に流体を供給する供給管２２と、この供給管２２内に設けられた逆止弁（図示せず）と、供給管２２の開口部に嵌脱自在なホース端末アタッチメント３と供給管２２とを連結するカプラー２３と、を有している。 As shown in FIG. 3, the cylinder member 2 includes a cylinder main body 21 to which a fluid is supplied, a supply pipe 22 for supplying the fluid to the cylinder main body 21, and a check provided in the supply pipe 22. It has a valve (not shown) and a coupler 23 that connects the hose terminal attachment 3 that can be freely inserted into and removed from the opening of the supply pipe 22 and the supply pipe 22.

供給管２２は、シリンダー本体２１に螺合されている。この供給管２２の開口部には、流体供給ホースＨの先端に取付けられるホース端末アタッチメント３と供給管２２とを連結させるカプラー２３が設けられている。流体供給ホースＨは、材質としては公知のものを使用することができるが、ポリホースなどの硬質なものとすれば、この流体供給ホースを手動又は自動で押し込んでいくことによって、パッカー装置１を外管Ｐの先端部分まで挿入していくことができ、長深度でも確実に先端部分に設置できるため好適である。なお、流体としては、水や油などの液体、空気などの気体等を用いることができるが、水を用いることが好適である。
供給管２２の内部には、図示しない逆止弁が取付けられており、外管Ｐの先端開口を閉塞した際に、ホース端末アタッチメント３が外れた後でも、シリンダー本体２１内の流体が、シリンダー本体２１内から外部へ流出しないようになっている。 The supply pipe 22 is screwed to the cylinder body 21. A coupler 23 that connects the hose terminal attachment 3 attached to the tip of the fluid supply hose H and the supply pipe 22 is provided at the opening of the supply pipe 22. A known material can be used for the fluid supply hose H. However, if the material is a hard material such as a polyhose, the packer device 1 can be removed by pushing the fluid supply hose manually or automatically. The tube P can be inserted up to the tip, and can be reliably installed at the tip even at a long depth, which is preferable. As the fluid, a liquid such as water or oil, a gas such as air, or the like can be used, but water is preferable.
A check valve (not shown) is attached to the inside of the supply pipe 22, and the fluid in the cylinder body 21 remains in the cylinder body 21 even after the hose terminal attachment 3 is detached when the front end opening of the outer pipe P is closed. The main body 21 does not flow out to the outside.

カプラー２３は、図３に示すように、供給管２２の外周に取付けられたリング２３Ａと、リング２３Ａ内周面の押圧によって供給管２２の内周面から一部突出している複数のボール２３Ｂと、リング２３Ａの下部に取付けられ、リング２３Ａを上方に押圧する圧縮バネ２３Ｃと、を有している。供給管２２の開口部は、ホース端末アタッチメント３を嵌合させることができるようになっており、かつカプラー２３によって、ホース端末アタッチメント３と一体化できるようになっている。
ホース端末アタッチメント３は、図３に示すように、その先端に形成された係合溝３Ａとボール２３Ｂとが係合することにより供給管２２に固定されるようになっている。 As shown in FIG. 3, the coupler 23 includes a ring 23 A attached to the outer periphery of the supply pipe 22, and a plurality of balls 23 B partially protruding from the inner peripheral surface of the supply pipe 22 by pressing of the inner peripheral surface of the ring 23 A. And a compression spring 23C that is attached to the lower portion of the ring 23A and presses the ring 23A upward. The opening of the supply pipe 22 can be fitted with the hose terminal attachment 3, and can be integrated with the hose terminal attachment 3 by the coupler 23.
As shown in FIG. 3, the hose terminal attachment 3 is fixed to the supply pipe 22 by the engagement of the engagement groove 3 A formed at the tip thereof and the ball 23 B.

リング２３Ａは、図４に示すように、その上端部が後述する円形プレート状の解除部材９の下部と当接し、ピストン部材４の軸方向への摺動に伴って，解除部材９が下方に移動し、それによって下方に押し下げられる構成になっている。リング２３Ａが下方に押し下げられることにより、供給管２２の側壁部分に係止されているボール２３Ｂが半径方向の外側（リング側）に移動し、ホース端末アタッチメント３との連結が解除される構成になっている。具体的には、ボール２３Ｂが係止されている供給管２２の側壁部分の下面は、半径方向の外側に向かって下方に傾斜しており、リング２３Ａが押し下げられることにより、リング２３Ａの肉薄部分にボール２３Ｂの一部が納められるようになる。そのため、図５に示すように、ボール２３Ｂとホース端末アタッチメント３の係合溝３Ａとの係合関係が解除されて、ホース端末アタッチメント３を引き抜くことができるようになっている。 As shown in FIG. 4, the ring 23 A abuts the lower end of a circular plate-shaped release member 9, which will be described later, and the release member 9 moves downward as the piston member 4 slides in the axial direction. It is configured to move and thereby be pushed downward. When the ring 23A is pushed downward, the ball 23B locked to the side wall portion of the supply pipe 22 moves outward in the radial direction (ring side), and the connection with the hose terminal attachment 3 is released. It has become. Specifically, the lower surface of the side wall portion of the supply pipe 22 to which the ball 23B is locked is inclined downward toward the outside in the radial direction, and the thin portion of the ring 23A is pushed down by the ring 23A being pushed down. A part of the ball 23B can be accommodated. Therefore, as shown in FIG. 5, the engagement relationship between the ball 23B and the engagement groove 3A of the hose terminal attachment 3 is released, and the hose terminal attachment 3 can be pulled out.

シリンダー本体２１の先端側には、図３に示すように、フランジ部２１Ａが形成されており、このシリンダーフランジ部２１Ａには、ロッド状の第１の連結具６が螺着されて取付けられている。第１の連結具６は、シリンダーフランジ部２１Ａとパッカー支持部材７とを連結して一体化させている。パッカー支持部材７は、円形プレート状であり、後述するピストンフランジ部４Ａと共に、パッカー本体５を挟み込み、このパッカー本体５を支持している。パッカー支持部材７は、パッカー装置１を外管Ｐの先端部分まで押し込んだ際には、地盤の切羽面に当接し、地盤から反力を受けてピストン部材４の押圧力に対抗することになる。 As shown in FIG. 3, a flange portion 21A is formed on the distal end side of the cylinder body 21, and a rod-shaped first coupling tool 6 is screwed and attached to the cylinder flange portion 21A. Yes. The first connector 6 connects and integrates the cylinder flange portion 21 A and the packer support member 7. The packer support member 7 has a circular plate shape, sandwiches the packer main body 5 together with a piston flange portion 4A described later, and supports the packer main body 5. When the packer support member 7 is pushed down to the tip of the outer tube P, the packer support member 7 abuts against the face of the ground and receives a reaction force from the ground to counter the pressing force of the piston member 4. .

ピストン部材４には、その先端部にピストンフランジ部４Ａが形成されており、このピストンフランジ部４Ａによりパッカー本体５が押圧されるようになっている。パッカー本体５は、略環状の天然ゴムや合成ゴム等からなる弾性体であり、ピストンフランジ部４Ａで押圧されることにより、図４に示すように、その半径方向に張出され、外管Ｐの内周面に当接して液密を図ることができる。なお、シリンダー本体５との気密性を確保するために、Ｏリング４Ｂ，４Ｂが取付けられている。
ピストンフランジ部４Ａには、供給管方向に延びるロッド状の第２の連結具８が螺着され取付けられている。第２の連結具８は、ピストンフランジ部４Ａと円形プレート状の解除部材９とを連結して一体化させている。解除部材９は、前述したように、カプラー２３のリング２３Ａを押し下げ、供給管２２とホース端末アタッチメント３との連結を解除するものである。具体的には、図４に示すように、ピストン部材４がシリンダー部材２内の流体により押圧されて、ピストン部材４が移動することにより、パッカー本体５が軸方向に収縮され、そのことによって、第２の連結具８を介して解除部材９が押し下げられることによって、カプラー２３のリング２３Ａを押し下げるものである。 The piston member 4 is formed with a piston flange portion 4A at its tip, and the packer body 5 is pressed by the piston flange portion 4A. The packer body 5 is an elastic body made of substantially annular natural rubber, synthetic rubber, or the like, and is pressed in the radial direction as shown in FIG. It is possible to achieve liquid-tightness by abutting on the inner peripheral surface. In order to ensure airtightness with the cylinder body 5, O-rings 4B and 4B are attached.
A rod-like second connector 8 extending in the supply pipe direction is screwed and attached to the piston flange portion 4A. The second connector 8 connects and integrates the piston flange portion 4A and the circular plate-shaped release member 9. As described above, the release member 9 pushes down the ring 23 A of the coupler 23 to release the connection between the supply pipe 22 and the hose terminal attachment 3. Specifically, as shown in FIG. 4, when the piston member 4 is pressed by the fluid in the cylinder member 2 and the piston member 4 moves, the packer body 5 is contracted in the axial direction. When the release member 9 is pushed down via the second connector 8, the ring 23A of the coupler 23 is pushed down.

パッカー本体５が外管Ｐの内周面と当接する際の、パッカー本体５の軸方向の収縮量と、ボール２３Ｂとホース端末アタッチメント３の係合溝３Ａとの係合関係が解除されるまでのカプラー２３のリング２３Ａの移動量とを、予め合わせておくことが必要となる。予め合わせておけば、シリンダー部材２内に流体を供給して、パッカー本体５を軸心方向に圧縮し、半径方向に張出させ前記有孔管の内周面に当接して液密を図り、先端開口を閉塞したのに合わせて、ホース端末アタッチメント３とシリンダー部材２との嵌合を解除することができ、長深度でも確実で、かつ効率よくホース端末アタッチメント３を含めて流体供給ホースＨを回収することができる。なお、解除部材９の位置を調整することにより、ボール２３Ｂとホース端末アタッチメント３の係合溝３Ａとの係合関係が解除されるまでの位置関係を調整することができる。そのため、パッカー本体５の軸方向の収縮が可能な範囲で、第２の連結具８と解除部材９との螺着位置を調整することにより、外管径の大きさの相違にも対応させることができる。 Until the packer body 5 is brought into contact with the inner peripheral surface of the outer tube P until the contraction amount in the axial direction of the packer body 5 and the engagement relationship between the ball 23B and the engagement groove 3A of the hose terminal attachment 3 are released. It is necessary to match the amount of movement of the ring 23A of the coupler 23 in advance. If they are matched in advance, a fluid is supplied into the cylinder member 2 to compress the packer body 5 in the axial direction and project in the radial direction so as to come into contact with the inner peripheral surface of the perforated tube to achieve liquid tightness. When the tip opening is closed, the fitting between the hose terminal attachment 3 and the cylinder member 2 can be released, and the fluid supply hose H including the hose terminal attachment 3 is reliable and efficient even at a long depth. Can be recovered. In addition, by adjusting the position of the release member 9, the positional relationship until the engagement relationship between the ball 23B and the engagement groove 3A of the hose terminal attachment 3 is released can be adjusted. Therefore, by adjusting the screwing position of the second connector 8 and the release member 9 within a range in which the packer body 5 can be contracted in the axial direction, it is possible to cope with the difference in the outer tube diameter. Can do.

ローラユニット１０，１０，…は、図２に示すように、そのローラにより、外管Ｐの内周面に摺動して回動し、パッカー装置１の外管Ｐ内の移動を容易化すると共に、外管Ｐとパッカー装置１のとの半径方向の間隔を一定に保たせている。なお、図３乃至図５には、便宜上、ローラユニットは省略している。 As shown in FIG. 2, the roller units 10, 10,... Slide and rotate on the inner peripheral surface of the outer tube P to facilitate movement of the packer device 1 in the outer tube P. At the same time, the radial distance between the outer tube P and the packer device 1 is kept constant. In FIG. 3 to FIG. 5, the roller unit is omitted for convenience.

＜本発明に係るパッカー装置（実施形態１）を用いた薬液注入工法＞
注入口（図示せず）が長手方向に間隔を置いて多数形成された外管Ｐを削孔機（図示せず）に取付けて、対象地盤内に挿入する。削孔に際しては別途用意した先端に削孔ビットを有する削孔ロッド（図示せず）により穿孔し、この穿孔の進行に伴い当該外管Ｐを前進させることで挿入できる。外管Ｐは、継ぎ足しにより所定長さとすることができる。
次に、この外管Ｐ内に、そのままパッカー装置１を落とし込むか、あるいは流体供給ホースＨで押し込むことにより、図３に示すように、パッカー装置１を外管Ｐの先端部分まで挿入する。
次に、流体供給ホースＨ内に流体を供給し、図４に示すように、シリンダー部材２内のピストン部材４を流体により押圧し、ピストン部材４を摺動させる。そして、ピストン部材４によりパッカー本体５を押圧することで、パッカー本体５をその半径方向に張出させ、外管Ｐの内周面に当接させ液密を図る。
また、パッカー本体５が軸方向に収縮されることにより、第２の連結具８を介して解除部材９が押し下げられ、カプラー２３のリング２３Ａを押し下げ、図５に示すように、ホース端末アタッチメント３との連結を解除する。この際には、逆止弁（図示せず）により、ホース端末アタッチメント３が外れた後でも、供給された流体が、シリンダー部材２内から流出しない。次いで、流体の供給を止め、流体供給ホースＨを引き上げて、ホース端末アタッチメント３を含めて回収すればよい。
その後、公知の注入管（図示せず）を外管Ｐ内に挿入し、公知の方法で薬液注入を行なえばよい。 <Chemical liquid injection method using packer device (Embodiment 1) according to the present invention>
An outer pipe P having a large number of inlets (not shown) spaced apart in the longitudinal direction is attached to a drilling machine (not shown) and inserted into the target ground. When drilling, it can be inserted by drilling with a drilling rod (not shown) having a drilling bit at the tip prepared separately and moving the outer tube P forward as the drilling proceeds. The outer pipe P can be made a predetermined length by adding.
Next, the packer device 1 is inserted into the outer tube P as it is or is pushed with the fluid supply hose H as shown in FIG.
Next, a fluid is supplied into the fluid supply hose H, and as shown in FIG. 4, the piston member 4 in the cylinder member 2 is pressed by the fluid, and the piston member 4 is slid. Then, by pressing the packer body 5 with the piston member 4, the packer body 5 is projected in the radial direction and brought into contact with the inner peripheral surface of the outer tube P to achieve liquid tightness.
Further, when the packer body 5 is contracted in the axial direction, the release member 9 is pushed down via the second connector 8, and the ring 23A of the coupler 23 is pushed down. As shown in FIG. Disconnect from the link. At this time, the supplied fluid does not flow out of the cylinder member 2 even after the hose terminal attachment 3 is detached by the check valve (not shown). Next, the supply of fluid is stopped, the fluid supply hose H is pulled up, and the hose terminal attachment 3 and the like can be collected.
Thereafter, a known injection tube (not shown) may be inserted into the outer tube P and chemical solution injection may be performed by a known method.

＜他の実施形態のパッカー装置の構成（実施形態２）＞
実施形態１のパッカー装置は、パッカー本体５の軸方向の収縮量と、ボール２３Ｂとホース端末アタッチメント３の係合溝３Ａとの係合関係が解除されるまでのカプラー２３のリング２３Ａの移動量とが同じであるため、カプラー２３のリング２３Ａの移動に必要な長さを長く設定できない場合には、パッカー本体５の軸方向の収縮量が小さくなり、十分にパッカー本体５を半径方向に張出させることができない虞がある。
そこで、実施形態２のパッカー装置は、パッカー本体の軸方向の移動量とカプラーの押し込み量とを別々に設定できるように構成し、より確実にパッカー本体を半径方向に張出させ有孔管の内周面に当接させ、液密を図って先端開口を閉塞することができるようにしている。
実施形態２のパッカー装置１１は、先端開口を閉塞するパッカー部材１３と、このパッカー部材１３に嵌脱自在なシリンダー部材１２と、を備えている。以下に、図６乃至図１４に基づき、これらシリンダー部材１２とパッカー部材１３とについて詳述する。 <Configuration of Packer Device of Other Embodiment (Embodiment 2)>
The packer device according to the first embodiment includes the amount of contraction in the axial direction of the packer body 5 and the amount of movement of the ring 23A of the coupler 23 until the engagement relationship between the ball 23B and the engagement groove 3A of the hose terminal attachment 3 is released. Therefore, when the length required for the movement of the ring 23A of the coupler 23 cannot be set long, the contraction amount of the packer body 5 in the axial direction becomes small, and the packer body 5 is sufficiently stretched in the radial direction. There is a possibility that it cannot be released.
Therefore, the packer device of the second embodiment is configured such that the amount of movement of the packer body in the axial direction and the amount of pushing of the coupler can be set separately, and the packer body is more reliably extended in the radial direction, so that the porous tube It is made to contact | abut to an internal peripheral surface, and it aims at liquid tightness so that a front-end | tip opening can be obstruct | occluded.
The packer device 11 according to the second embodiment includes a packer member 13 that closes the front end opening, and a cylinder member 12 that is detachable from the packer member 13. Hereinafter, the cylinder member 12 and the packer member 13 will be described in detail with reference to FIGS.

（シリンダー部材）
シリンダー部材１２は、図６及び図７に示すように、流体を供給する流体供給ホースＨの端部に取付けられる二重管構造のホース端末アタッチメント３０と、該ホース端末アタッチメント３０に取付けられ、このホース端末アタッチメント外管部３０Ａからの流体が内部に供給されるシリンダー本体３１と、このシリンダー本体３１に内装され、かつ前記ホース端末アタッチメント内管部３０Ｂに接続された内装管３２と、前記シリンダー本体３１内に供給された流体によりシリンダー本体３１内を摺動可能なピストン部材３３と、を備えている。
図７に示すように、シリンダー本体３１は頭部３１Ａと筒部３１Ｂとからなり、頭部３１Ａは筒部３１Ｂと螺着できるようになっている。シリンダー本体の頭部３１Ａには、ホース端末アタッチメント３０と螺着可能な口元部分３１Ｃが形成されている。シリンダー本体の頭部３１Ａは、二重管構造のホース端末アタッチメント内管部３０Ｂと接続可能な内装管３２を螺着できるように雌ネジが螺刻された挿入孔３１Ｄが穿設されていると共に、ホース端末アタッチメント外管部３０Ａの流体をシリンダー本体３１内に供給可能とする供給孔３１Ｅが形成されている。
シリンダー本体の筒部３１Ｂ側面には、図１０及び図１１に示すように、地盤に挿入された外管（有孔管）Ｐの内周面を摺動するにローラ３４，３４，…が取り付けられている。これらのローラ３４，３４，…により、外管Ｐの内周面に摺動して回動し、パッカー装置１１の外管Ｐ内の移動を容易化すると共に、外管Ｐとパッカー装置１１との半径方向の間隔を一定に保たせている。
ホース端末アタッチメント３０の一方端（先端）は、図７に示すように、シリンダー本体の頭部３１Ａに形成された口元部分３１Ｃと螺着可能となっており、その他方端（基端）は流体供給ホースＨと螺着可能となっている。流体供給ホースＨは、二重管構造のものであればよく、材質としては公知のものを使用することができるが、ポリホースなどの硬質なものとすれば、この流体供給ホースＨを手動又は自動で押し込んでいくことによって、パッカー装置１１を外管Ｐの先端部分まで挿入していくことができ、長深度でも確実に先端部分に設置できるため好適である。なお、流体としては、水や油などの液体、空気などの気体等を用いることができるが、水を用いることが好適である。
内装管３２の先端には、図７及び図１１に示すように、内装管３２とパッカー部材１３の連結アタッチメントの連結管部４０Ｂとを連結するカプラー３５が取付けられている。カプラー３５の構造は、前述の実施形態１のパッカー装置１のものと同じであるので説明を省略する。なお、図７、図１１乃至図１４の断面図においては、内装管３２及びカプラー３５の断面は省略し、正面図のみを表示している。
ピストン部材３３には、図７に示すように、その先端部にピストンフランジ部３３Ａが形成されており、このピストンフランジ部３３Ａによりパッカー本体４１が押圧されるようになっている。ピストン部材３３は、ホース端末アタッチメント外管部３０Ａから供給された流体がピストン部材３３の端部を押圧するようになっている。
図中の符号３６は、シリンダー本体３１等との気密性を確保するためのＯリングを示している。
なお、上記実施形態２では、ホース端末アタッチメント外管部３０Ａからの流体をシリンダー本体３１内に供給し、ホース端末アタッチメント内管部３０Ｂからの流体を内装管３２に供給する構成としているが、これに限られず、図示はしないが、ホース端末アタッチメント内管部３０Ｂからの流体をシリンダー本体３１内に供給し、ホース端末アタッチメント外管部３０Ａからの流体を内装管３２に供給する構成としてもよい。 (Cylinder member)
As shown in FIGS. 6 and 7, the cylinder member 12 is attached to a hose terminal attachment 30 having a double pipe structure attached to an end of a fluid supply hose H for supplying a fluid, and the hose terminal attachment 30. A cylinder main body 31 to which fluid from the hose terminal attachment outer pipe portion 30A is supplied, an inner pipe 32 provided in the cylinder main body 31 and connected to the hose terminal attachment inner pipe portion 30B, and the cylinder main body A piston member 33 slidable in the cylinder body 31 by the fluid supplied into the cylinder 31.
As shown in FIG. 7, the cylinder body 31 includes a head portion 31A and a tube portion 31B, and the head portion 31A can be screwed to the tube portion 31B. A head portion 31A of the cylinder main body is formed with a mouth portion 31C that can be screwed to the hose terminal attachment 30. The cylinder body head portion 31A is provided with an insertion hole 31D in which a female screw is threaded so that an internal tube 32 connectable to a double tube hose terminal attachment inner tube portion 30B can be screwed. In addition, a supply hole 31 E capable of supplying the fluid in the hose terminal attachment outer pipe portion 30 A into the cylinder body 31 is formed.
As shown in FIGS. 10 and 11, rollers 34, 34,... Are attached to the side surface of the cylinder portion 31B of the cylinder body to slide on the inner peripheral surface of the outer tube (perforated tube) P inserted into the ground. It has been. These rollers 34, 34,... Slide and rotate on the inner peripheral surface of the outer tube P to facilitate the movement of the packer device 11 in the outer tube P, and the outer tube P and the packer device 11 The distance in the radial direction is kept constant.
As shown in FIG. 7, one end (tip) of the hose terminal attachment 30 can be screwed to a mouth portion 31C formed on the head portion 31A of the cylinder body, and the other end (base end) is fluid. It can be screwed to the supply hose H. The fluid supply hose H may be of a double-pipe structure, and a known material can be used. However, if the fluid supply hose H is hard such as a polyhose, the fluid supply hose H can be manually or automatically used. By pushing in, the packer device 11 can be inserted up to the distal end portion of the outer tube P, which is preferable because it can be reliably installed at the distal end portion even at a long depth. As the fluid, a liquid such as water or oil, a gas such as air, or the like can be used, but water is preferable.
As shown in FIGS. 7 and 11, a coupler 35 that connects the internal pipe 32 and the connection pipe portion 40 B of the connection attachment of the packer member 13 is attached to the tip of the internal pipe 32. Since the structure of the coupler 35 is the same as that of the packer device 1 of the first embodiment, description thereof is omitted. In FIG. 7 and FIGS. 11 to 14, the inner pipe 32 and the coupler 35 are omitted, and only the front view is shown.
As shown in FIG. 7, the piston member 33 is formed with a piston flange portion 33A at the tip thereof, and the packer body 41 is pressed by the piston flange portion 33A. The piston member 33 is configured such that the fluid supplied from the hose terminal attachment outer pipe portion 30 A presses the end of the piston member 33.
Reference numeral 36 in the drawing indicates an O-ring for ensuring airtightness with the cylinder body 31 and the like.
In the second embodiment, the fluid from the hose terminal attachment outer pipe part 30A is supplied into the cylinder main body 31, and the fluid from the hose terminal attachment inner pipe part 30B is supplied to the interior pipe 32. Although not shown in the figure, the fluid from the hose terminal attachment inner pipe part 30B may be supplied into the cylinder body 31 and the fluid from the hose terminal attachment outer pipe part 30A may be supplied to the inner pipe 32.

（パッカー部材）
パッカー部材１３は、図８及び図９に示すように、シリンダー部材１２の内装管３２に取付けられたカプラー３５により、該内装管３２に着脱自在な連結アタッチメント４０と、ピストン部材３３によって軸方向に押圧される環状の弾性体で形成されたパッカー本体４１と、このパッカー本体４１が押圧されることによりパッカー本体４１の内周部分に挿入され、この挿入によりパッカー本体４１を半径方向に張出させる挿入部材４２と、を備えている。
連結アタッチメント４０は、図９に示すように、シリンダー部材１２の前記カプラー３５に着脱自在で、かつ内装管３２からの流体が導かれる連結管部４０Ａと、この連結管部４０Ａの外周を所定の間隔をもって同芯状に覆う連結アタッチメント外管部４０Ｂと、連結管部４０Ａと連結アタッチメント外管部４０Ｂとの間に摺動可能に嵌合され、かつ前記カプラー３５を押圧可能な押圧部４０Ｃと、を有している。
連結管部４０Ａの頭部端（先端）形状は、カプラー３５に嵌合可能なように形成されており、カプラー３５によってチャック可能になっている。連結管部４０Ａの後端には、連結アタッチメント外管部４０Ｂに螺着可能となるように外周部分に雄ネジが螺刻されたロッド状部材の固定部４０Ｄが取付けられている。連結管部４０Ａは、この固定部４０Ｄを介して連結アタッチメント外管部４０Ｂと一体化できるようになっており、また、固定部４０Ｄにより連結管部４０Ａ内を流れる流体を堰き止めることができるようになっている。
連結管部４０Ａの後方には供給孔４０Ｅが形成されており、この供給孔４０Ｅによって内部に導入された流体が連結管部４０Ａと連結アタッチメント外管部４０Ｂとの間に流れるようになっている。
連結アタッチメント外管部４０Ｂは、図９に示すように、連結管部４０Ａを内装することにより二重管の外側の管として機能するようになっている。連結アタッチメント外管部４０Ｂは、連結管部４０Ａを内装するために、この連結管部４０Ａが挿入される部分を境に分離可能となっており、固定部４０Ｄとの螺着により一体化するようになっている。
押圧部４０Ｃは、連結管部４０Ａの外周を覆う環状であり、その基端部分は連結管部４０Ａと連結アタッチメント外管部４０Ｂとの間に摺動可能に嵌合され、図１１に示すように、その頭部端の形状はカプラー３５に対応するように形成されている。そして、シリンダー部材１２とパッカー部材１３との連結解除は、連結管部４０Ａ内に供給された流体が連結管部４０Ａと連結アタッチメント外管部４０Ｂとの間に流れ、この流体が押圧部４０Ｃを押圧し、この押圧部４０Ｃがカプラー３５を押圧することにより行なわれるように構成されている。
なお、パッカー装置１１を外管Ｐの先端部分まで押し込んだ際には、図１０及び図１１に示すように、連結アタッチメント外管部４０Ｂの切羽側の端部が地盤の切羽面に当接することにより、外管Ｐの先端開口に到達したことを確認できるようになっているが、連結アタッチメント外管部４０Ｂの切羽側の端部を短くし、挿入部材４２のフランジ部４２Ａが地盤の切羽面に当接するようにしてもよい。
パッカー本体４１は、略環状の天然ゴムや合成ゴム等からなる弾性体であり、ピストンフランジ部３３Ａで押圧されることにより、挿入部材４２がパッカー本体４１の内周部分に挿入され、それにより半径方向に張出し、外管Ｐの内周面に当接して液密を図ることができるように構成されている。
挿入部材４２は、図９に示すように、パッカー本体４１の内周面に当接する部分である外周に、断面鋸歯状の突状部４２Ｂ，４２Ｂ，…が形成されている。また、挿入部材４２は、フランジ部４２Ａを介して連結アタッチメント外管部４０Ｂと一体化されている。断面鋸歯状の突状部４２Ｂ，４２Ｂ，…は、挿入部材４２の外周面にそれぞれリング状に形成され、かつパッカー本体４１の内周に挿入される側がテーパー面になるように構成されている。パッカー本体４１の端部がテーパーカットされていると共に、挿入部材４２のテーパー面で構成され、かつ突状部４２Ｂのうちパッカー本体に当接する端部（断面鋸歯の頂部）の表面積が小さいことにより、挿入部材４２の挿入作業が容易化されるようになっている。 (Packer member)
As shown in FIGS. 8 and 9, the packer member 13 is connected in the axial direction by a coupling attachment 40 detachably attached to the inner pipe 32 and a piston member 33 by a coupler 35 attached to the inner pipe 32 of the cylinder member 12. The packer main body 41 formed of an annular elastic body to be pressed, and the packer main body 41 is inserted into the inner peripheral portion of the packer main body 41 by being pressed, and this insertion causes the packer main body 41 to project in the radial direction. And an insertion member 42.
As shown in FIG. 9, the connection attachment 40 is detachably attached to the coupler 35 of the cylinder member 12 and a connection pipe portion 40A through which a fluid from the inner pipe 32 is guided, and an outer periphery of the connection pipe portion 40A is provided in a predetermined manner. A connecting attachment outer tube portion 40B that covers the concentric shape with a gap, and a pressing portion 40C that is slidably fitted between the connecting tube portion 40A and the connecting attachment outer tube portion 40B and that can press the coupler 35. ,have.
The head end (tip) shape of the connecting pipe portion 40A is formed so as to be fitted to the coupler 35, and can be chucked by the coupler 35. At the rear end of the connecting pipe portion 40A, a rod-shaped member fixing portion 40D having a male screw threaded on the outer peripheral portion is attached so as to be screwed to the connecting attachment outer pipe portion 40B. The connecting tube portion 40A can be integrated with the connecting attachment outer tube portion 40B via the fixing portion 40D, and the fluid flowing in the connecting tube portion 40A can be blocked by the fixing portion 40D. It has become.
A supply hole 40E is formed at the rear of the connection pipe part 40A, and the fluid introduced into the inside through the supply hole 40E flows between the connection pipe part 40A and the connection attachment outer pipe part 40B. .
As shown in FIG. 9, the connection attachment outer tube portion 40B functions as a tube outside the double tube by incorporating a connection tube portion 40A. The connecting attachment outer tube portion 40B is separable at the portion where the connecting tube portion 40A is inserted in order to house the connecting tube portion 40A, and is integrated by screwing with the fixing portion 40D. It has become.
The pressing portion 40C has an annular shape covering the outer periphery of the connecting tube portion 40A, and the base end portion thereof is slidably fitted between the connecting tube portion 40A and the connecting attachment outer tube portion 40B, as shown in FIG. Further, the shape of the head end is formed so as to correspond to the coupler 35. Then, when the cylinder member 12 and the packer member 13 are disconnected, the fluid supplied into the connecting tube portion 40A flows between the connecting tube portion 40A and the connecting attachment outer tube portion 40B, and this fluid passes through the pressing portion 40C. The pressing portion 40 C is configured to be pressed by pressing the coupler 35.
When the packer device 11 is pushed to the distal end portion of the outer tube P, as shown in FIGS. 10 and 11, the face side end portion of the connection attachment outer tube portion 40B comes into contact with the face surface of the ground. Thus, it can be confirmed that the tip end opening of the outer tube P has been reached, but the end portion on the face side of the connecting attachment outer tube portion 40B is shortened, and the flange portion 42A of the insertion member 42 becomes the face surface of the ground. You may make it contact | abut.
The packer body 41 is an elastic body made of substantially annular natural rubber, synthetic rubber, or the like, and is inserted into the inner peripheral portion of the packer body 41 by being pressed by the piston flange portion 33A. It extends in the direction and is configured to be in contact with the inner peripheral surface of the outer tube P to achieve liquid tightness.
As shown in FIG. 9, the insertion member 42 is formed with protruding portions 42 B, 42 B,. Further, the insertion member 42 is integrated with the connection attachment outer tube portion 40B via the flange portion 42A. .. Are formed in a ring shape on the outer peripheral surface of the insertion member 42, and the side to be inserted into the inner periphery of the packer body 41 is a tapered surface. . The end portion of the packer main body 41 is tapered, and the surface of the end portion (the top portion of the sawtooth cross section) of the protruding portion 42B that is in contact with the packer main body is small due to the tapered surface of the insertion member 42. The insertion work of the insertion member 42 is facilitated.

＜他の実施形態のパッカー装置（実施形態２）を用いた薬液注入工法＞
注入口（図示せず）が長手方向に間隔を置いて多数形成された外管Ｐを削孔機（図示せず）に取付けて、対象地盤内に挿入する。削孔に際しては別途用意した先端に削孔ビットを有する削孔ロッド（図示せず）により穿孔し、この穿孔の進行に伴い当該外管Ｐを前進させることで挿入できる。外管Ｐは、継ぎ足しにより所定長さとすることができる。
次に、この外管Ｐ内に、そのままパッカー装置１１を落とし込むか、あるいは流体供給ホースＨで押し込むことにより、図１０及び図１１に示すように、パッカー装置１１を外管Ｐの先端部分まで挿入する。
次に、二重管構造の流体供給ホースＨの外管部に流体を供給し、図１２に示すように、シリンダー本体３１内のピストン部材３３を流体により押圧し、ピストン部材３３を摺動させる。そして、ピストン部材３３によりパッカー本体４１を押圧することで、挿入部材４２がパッカー本体４１の内周部分に挿入され、それにより半径方向に張出し、外管Ｐの内周面に当接して液密を図る。
パッカー本体４１の外周が外管Ｐの内周面に当接し液密が図られたことを確認（流体供給ホースＨを地上で引張ることにより、ホースＨが引き抜けるかどうかで当接状態を確認）した後、流体供給ホースＨの外管部分への流体の供給を止める。その後、図１３に示すように、二重管構造の流体供給ホースＨの内管部分に流体を供給し、連結管部４０Ａの内部から供給孔４０Ｅを介し連結管部４０Ａと連結アタッチメント外管部４０Ｂとの間に流れ、押圧部４０Ｃの後端部を押圧し、それによりこの押圧部４０Ｃがカプラー３５を押圧し連結を解除する。
その後、図１４に示すように、流体供給ホースＨの内管部分への流体の供給を止め、流体供給ホースＨを引き上げて、シリンダー部材１２を含めて回収すればよい。
その後、公知の注入管（図示せず）を外管Ｐ内に挿入し、公知の方法で薬液注入を行なえばよい。 <Chemical Solution Injection Method Using Packer Device (Embodiment 2) of Other Embodiment>
An outer pipe P having a large number of inlets (not shown) spaced apart in the longitudinal direction is attached to a drilling machine (not shown) and inserted into the target ground. When drilling, it can be inserted by drilling with a drilling rod (not shown) having a drilling bit at the tip prepared separately and moving the outer tube P forward as the drilling proceeds. The outer pipe P can be made a predetermined length by adding.
Next, as shown in FIGS. 10 and 11, the packer device 11 is inserted into the outer tube P as it is by dropping the packer device 11 into the outer tube P as it is or pushing it in with the fluid supply hose H. To do.
Next, a fluid is supplied to the outer tube portion of the fluid supply hose H having a double tube structure, and as shown in FIG. 12, the piston member 33 in the cylinder body 31 is pressed by the fluid, and the piston member 33 is slid. . Then, when the packer body 41 is pressed by the piston member 33, the insertion member 42 is inserted into the inner peripheral portion of the packer body 41, thereby projecting in the radial direction and contacting the inner peripheral surface of the outer tube P to be liquid-tight. Plan.
Confirm that the outer periphery of the packer main body 41 is in contact with the inner peripheral surface of the outer pipe P and is liquid-tight (by checking whether the hose H is pulled out by pulling the fluid supply hose H on the ground) After that, the supply of fluid to the outer tube portion of the fluid supply hose H is stopped. Thereafter, as shown in FIG. 13, the fluid is supplied to the inner tube portion of the fluid supply hose H having a double tube structure, and the connection tube portion 40A and the connection attachment outer tube portion are connected from the inside of the connection tube portion 40A through the supply hole 40E. 40B, and presses the rear end portion of the pressing portion 40C, whereby the pressing portion 40C presses the coupler 35 to release the connection.
Thereafter, as shown in FIG. 14, the supply of fluid to the inner pipe portion of the fluid supply hose H is stopped, the fluid supply hose H is pulled up, and the cylinder member 12 and the like can be collected.
Thereafter, a known injection tube (not shown) may be inserted into the outer tube P and chemical solution injection may be performed by a known method.

従来例のパッカー装置による外管の先端開口の閉塞方法である。It is the closing method of the front-end | tip opening of an outer tube | pipe by the packer apparatus of a prior art example. 本発明に係るパッカー装置（実施形態１）の斜視図である。1 is a perspective view of a packer device (Embodiment 1) according to the present invention. 本発明に係るパッカー装置（実施形態１）の正面図及び縦断面図である。It is the front view and longitudinal cross-sectional view of the packer apparatus (Embodiment 1) which concern on this invention. パッカー本体が外管の内周面に当接している状態を示すパッカー装置（実施形態１）の正面図及び縦断面図である。It is the front view and longitudinal cross-sectional view of the packer apparatus (Embodiment 1) which show the state which the packer main body is contact | abutting to the internal peripheral surface of an outer tube | pipe. ホース端末アタッチメントと供給管との連結が解除された状態を示すパッカー装置（実施形態１）の正面図及び縦断面図である。It is the front view and longitudinal cross-sectional view of the packer apparatus (Embodiment 1) which show the state by which the connection of a hose terminal attachment and a supply pipe was cancelled | released. 本発明に係るパッカー装置（実施形態２）のシリンダー部材の正面図である。It is a front view of the cylinder member of the packer apparatus (Embodiment 2) which concerns on this invention. その断面図である。FIG. 本発明に係るパッカー装置（実施形態２）のパッカー部材の正面図である。It is a front view of the packer member of the packer apparatus (Embodiment 2) which concerns on this invention. その断面図である。FIG. 本発明に係るパッカー装置（実施形態２）の正面図である。It is a front view of the packer apparatus (Embodiment 2) which concerns on this invention. その断面図である。FIG. ピストン部材によりパッカー本体４１を押圧した状態のパッカー装置（実施形態２）の断面図である。It is sectional drawing of the packer apparatus (Embodiment 2) of the state which pressed the packer main body 41 with the piston member. 押圧部がカプラーを押圧した状態のパッカー装置（実施形態２）の断面図である。It is sectional drawing of the packer apparatus (Embodiment 2) in the state which the press part pressed the coupler. 連結を解除した状態のパッカー装置（実施形態２）の断面図である。It is sectional drawing of the packer apparatus (Embodiment 2) of the state which cancelled | released connection.

Explanation of symbols

１…パッカー装置（実施形態１）、２…シリンダー部材、３…ホース端末アタッチメント（スリーブ）、３Ａ…係合溝、４…ピストン部材、４Ａ…ピストンフランジ部、４Ｂ…Ｏリング、５…パッカー本体、６…第１の連結具、７…パッカー支持部材、８…第２の連結具、９…解除部材、１０…ローラユニット、１１…パッカー装置（実施形態２）、１２…シリンダー部材、１３…パッカー部材、２１…シリンダー本体、２１Ａ…シリンダーフランジ部、２２…供給管、２３…カプラー、２３Ａ…リング、２３Ｂ…ボール、３０…ホース端末アタッチメント、３０Ａ…ホース端末アタッチメント外管部、３１…シリンダー本体、３１Ａ…シリンダー本体頭部、３１Ｂ…シリンダー本体筒部、３１Ｃ…口元部分、３１Ｄ…挿入孔、３１Ｅ…供給孔、３２…内装管、３３…ピストン部材、３４…ローラ、３５…カプラー、３６…Ｏリング、４０…連結アタッチメント、４０Ａ…連結管部、４０Ｂ…連結アタッチメント外管部、４０Ｃ…押圧部、４０Ｄ…固定部、４０Ｅ…供給孔、４１…パッカー本体、４２…挿入部材、４２Ａ…フランジ部、４２Ｂ…突状部、Ｈ…流体供給ホース、Ｐ…外管。 DESCRIPTION OF SYMBOLS 1 ... Packer apparatus (Embodiment 1), 2 ... Cylinder member, 3 ... Hose terminal attachment (sleeve), 3A ... Engagement groove, 4 ... Piston member, 4A ... Piston flange part, 4B ... O-ring, 5 ... Packer main body , 6 ... 1st connector, 7 ... Packer support member, 8 ... 2nd connector, 9 ... Release member, 10 ... Roller unit, 11 ... Packer device (Embodiment 2), 12 ... Cylinder member, 13 ... Packer member, 21 ... cylinder body, 21A ... cylinder flange, 22 ... supply pipe, 23 ... coupler, 23A ... ring, 23B ... ball, 30 ... hose terminal attachment, 30A ... hose terminal attachment outer pipe part, 31 ... cylinder body , 31A ... Cylinder body head, 31B ... Cylinder body cylinder part, 31C ... Mouth part, 31D ... Insertion hole, 31E ... Supply 32 ... Interior pipe, 33 ... Piston member, 34 ... Roller, 35 ... Coupler, 36 ... O-ring, 40 ... Connection attachment, 40A ... Connection pipe part, 40B ... Connection attachment outer pipe part, 40C ... Pressing part, 40D ... Fixed part, 40E ... supply hole, 41 ... packer main body, 42 ... insertion member, 42A ... flange part, 42B ... projecting part, H ... fluid supply hose, P ... outer tube.

Claims

A packer device for closing the tip opening of the perforated tube used in a chemical solution injection method for injecting a chemical into a perforated tube inserted in the ground and discharging the injected medicinal solution into the ground through the hole of the perforated tube. There,
A cylinder member to which a check valve is attached, a hose terminal attachment that supplies fluid into the cylinder member and that can be freely fitted to and removed from the cylinder member, a piston member that can slide in the cylinder member, and the piston member A packer body formed of an annular elastic body that is pressed in the axial direction, and a release means that moves in conjunction with the axial sliding of the piston member to release the fitting between the hose terminal attachment and the cylinder member; With
Fluid is supplied into the cylinder member from the fluid supply hose to which the hose terminal attachment is attached, and the packer body is compressed in the axial direction and extended in the radial direction so as to contact the inner peripheral surface of the perforated pipe. Close, close the tip opening,
When closing the tip opening, the packer body is configured to release the fitting between the hose terminal attachment and the cylinder member in accordance with the contact with the inner peripheral surface of the perforated tube.
Packer device characterized by that.

A packer device for closing the tip opening of the perforated tube used in a chemical solution injection method for injecting a chemical into a perforated tube inserted in the ground and discharging the injected medicinal solution into the ground through the hole of the perforated tube. There,
The packer device includes a packer member that closes the tip opening, and a cylinder member that can be freely inserted into and removed from the packer member.
The cylinder member is attached to the tip of a fluid supply hose that supplies fluid, and has a double-pipe structure hose terminal attachment, and is attached to the hose terminal attachment, and either the hose terminal attachment outer pipe part or the inner pipe part A cylinder main body to which fluid from the pipe portion is supplied; an internal pipe that is internally provided in the cylinder main body and connected to the other pipe portion of the hose terminal attachment; and a fluid that is supplied into the cylinder main body. A piston member capable of sliding in the cylinder body,
The packer member includes a coupling attachment detachably attached to the inner pipe by a coupler attached to the inner pipe of the cylinder member, and a packer body formed of an annular elastic body pressed in the axial direction by the piston member; The packer body is inserted into the inner peripheral portion of the packer body by being pressed, and has an insertion member that projects the packer body in the radial direction by this insertion,
The connection attachment is detachably attached to the coupler of the cylinder member, and a connection pipe part through which fluid from the inner pipe is guided, and a connection attachment outer pipe part concentrically covering the outer periphery of the connection pipe part with a predetermined interval. And a pressing part that is slidably fitted between the connecting pipe part and the connecting attachment outer pipe part, and that can press the coupler,
When the cylinder member and the packer member are disconnected, the fluid supplied into the connecting tube portion flows between the connecting tube portion and the connecting attachment outer tube portion, and the fluid presses the pressing portion. Is configured to be performed by pressing the coupler,
Packer device characterized by that.

The packer device according to claim 1 or 2, wherein the packer device is configured to be inserted into a tip of the perforated tube while being pushed by the fluid supply hose.

Using the packer device, the tip opening in the perforated tube inserted in the ground is closed, the medicinal solution is injected into the perforated tube, and this injected medicinal solution is discharged into the ground through the hole of the perforated tube Because
The packer device includes a cylinder member to which a check valve is attached, a hose terminal attachment that supplies fluid to the cylinder member and that can be freely inserted into and removed from the cylinder member, and a piston member that can slide in the cylinder member. , The packer body formed of an annular elastic body pressed in the axial direction by the piston member, and moved in conjunction with the axial sliding of the piston member, releasing the fitting between the hose terminal attachment and the cylinder member And a release means for
Insert the packer device to the tip in the perforated tube,
Supplying fluid into the cylinder member, compressing the packer body in the axial direction, projecting in the radial direction, contacting the inner peripheral surface of the perforated tube to achieve liquid tightness, closing the tip opening,
After closing the tip opening, release the fitting between the hose terminal attachment and the cylinder member.
A chemical injection method characterized by this.

Using the packer device, the tip opening in the perforated tube inserted in the ground is closed, the medicinal solution is injected into the perforated tube, and this injected medicinal solution is discharged into the ground through the hole of the perforated tube Because
The packer device includes a packer member that closes the tip opening, and a cylinder member that can be freely fitted to and removed from the packer member.
The cylinder member is attached to the tip of a fluid supply hose that supplies fluid, and has a double-pipe structure hose terminal attachment, and is attached to the hose terminal attachment, and either the hose terminal attachment outer pipe part or the inner pipe part A cylinder main body to which fluid from the pipe portion is supplied; an internal pipe that is internally provided in the cylinder main body and connected to the other pipe portion of the hose terminal attachment; and a fluid that is supplied into the cylinder main body. A piston member capable of sliding in the cylinder body,
The packer member includes a coupling attachment detachably attached to the inner pipe by a coupler attached to the inner pipe of the cylinder member, and a packer body formed of an annular elastic body pressed in the axial direction by the piston member; The packer body is inserted into the inner peripheral portion of the packer body by being pressed, and has an insertion member that projects the packer body in the radial direction by this insertion,
The connection attachment is detachably attached to the coupler of the cylinder member, and a connection pipe part through which fluid from the inner pipe is guided, and a connection attachment outer pipe part concentrically covering the outer periphery of the connection pipe part with a predetermined interval. And a pressing part that is slidably fitted between the connecting pipe part and the connecting attachment outer pipe part, and that can press the coupler,
Insert the packer device to the tip in the perforated tube,
Supply fluid from either the outer tube portion or the inner tube portion of the hose terminal attachment, press the packer body in the axial direction, and insert the insertion member into the inner peripheral portion of the packer body. , Projecting the packer body in the radial direction, contacting the inner peripheral surface of the perforated tube to achieve liquid tightness, closing the tip opening,
After closing the distal end opening, fluid is supplied from the other pipe portion of the hose terminal attachment, and the coupler is pressed through the pressing portion to release the fitting between the packer member and the cylinder member. ,
A chemical injection method characterized by this.