JP6247369B2 - Drilling equipment - Google Patents

Drilling equipment Download PDF

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JP6247369B2
JP6247369B2 JP2016214778A JP2016214778A JP6247369B2 JP 6247369 B2 JP6247369 B2 JP 6247369B2 JP 2016214778 A JP2016214778 A JP 2016214778A JP 2016214778 A JP2016214778 A JP 2016214778A JP 6247369 B2 JP6247369 B2 JP 6247369B2
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cutter
drilling
movable support
diameter
support cylinder
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JP2017039326A (en
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藤田 靖
靖 藤田
昭人 戸継
昭人 戸継
忠秀 山本
忠秀 山本
智久 山下
智久 山下
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Waterworks Technology Development Organization Co Ltd
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Description

本発明は、例えば、既存の鉄筋コンクリート製の浄水池・配水池等の貯水池での管路増設工事、或いは、鉄筋コンクリート製の貯水地の増設に伴う管連絡工事等を行う場合に必要となる穿孔技術で、詳しくは、構造体や配管等の被穿孔面に穿孔機の円筒状のカッターで穿孔する技術の改良に関する。   The present invention is, for example, a drilling technique required when performing pipe expansion work in existing reservoirs such as reinforced concrete water purification / reservoir or pipe connection work accompanying the expansion of reinforced concrete reservoirs. Specifically, the present invention relates to an improvement in a technique for perforating a surface to be perforated such as a structure or a pipe with a cylindrical cutter of a perforator.

例えば、コンクリート製の構造体に穿孔機の円筒状のカッターで貫通孔を形成する場合、一般に、穿孔機のスピンドルの先端部に、構造体の被穿孔面に形成される貫通孔の設定内径に該当する設定穿孔径の円筒状のカッターを取付け、このカッターで構造体の被穿孔面に設定内径の貫通孔を形成し、この穿孔に伴って発生した円柱状の切片を収納しているカッターを構造体から抜き出す方法が採られている(特許文献1、2参照)。   For example, when a through-hole is formed in a concrete structure with a cylindrical cutter of a drilling machine, the inner diameter of the through-hole formed in the drilled surface of the structure is generally set at the tip of the spindle of the drilling machine. Attach a cylindrical cutter with the appropriate set drilling diameter, and form a through-hole with a set inner diameter on the drilled surface of the structure with this cutter. The method of extracting from a structure is taken (refer patent document 1, 2).

特開平8−112813号公報JP-A-8-1112813 特開平8−260863号公報JP-A-8-260863 特開2001−182337号公報JP 2001-182337 A

しかし、貫通孔の穿孔径が大きくなると、それに伴って回収される円柱状の切片の重量が非常に大きくなるため、特に、横向きの貫通孔を形成する場合では、穿孔機のスピンドルが垂れ下がり側に傾動や撓み変形するため、円柱状の回収切片を収納しているカッターを引き戻すことができなくなる事態が発生する可能性がある。   However, as the drilling diameter of the through hole increases, the weight of the cylindrical section that is collected increases with this, so that the spindle of the drilling machine is on the drooping side particularly when forming a horizontal through hole. Since it tilts or bends and deforms, there is a possibility that a situation in which the cutter storing the cylindrical collection section cannot be pulled back.

そのため、穿孔機のスピンドルの直径を大きくし、且つ、軸受け構造を頑丈に構成する必要があり、穿孔機の大型化とそれに伴う工事スペースの拡大によって工事コストの高騰化を招来する不都合がある。   Therefore, it is necessary to increase the diameter of the spindle of the drilling machine and to make the bearing structure robust, and there is a disadvantage that the construction cost increases due to the enlargement of the drilling machine and the expansion of the work space accompanying it.

また、特許文献3に示すように、円柱状の切片を構造体側に残したまま円筒状のカッターを抜き出し、構造体側に残置された円柱状の切片を抜き出す切片抜出装置と、構造体の貫通孔から突出する切片を輪切りにするワイヤーソーとを用いて、残置切片を細断撤去する方法が提案されているが、この方法による場合では、構造体の貫通孔と重量のある円柱状の切片との間からカッターを引き抜く際に大きな引き抜き操作力が必要で、穿孔機の大型化を招来するとともに、穿孔機以外に切片抜出装置とワイヤーソーとが必要であるため、工事コストの高騰化を招来する不都合があった。   Further, as shown in Patent Document 3, a cylindrical cutter is extracted while leaving a columnar section on the structure side, and a section extracting device for extracting a columnar section left on the structure side and a penetration of the structure A method of chopping and removing the remaining section using a wire saw that cuts the section protruding from the hole into a circle has been proposed, but in this case, the through-hole of the structure and a heavy columnar section A large pulling force is required when pulling out the cutter from between, leading to an increase in the size of the drilling machine, and in addition to the drilling machine, a section extraction device and a wire saw are required, resulting in an increase in construction costs. There was an inconvenience to invite.

本発明は、上述の実状に鑑みて為されたものであって、その主たる課題は、カッターが引き戻せなくなる不都合を解消すると同時に、穿孔機の小型化とそれに伴う工事スペースの縮小化とによって工事コストの低廉化を達成することのできる穿孔設備を提供する点にある。 The present invention was made in view of the circumstances described above, the main object is at the same time to eliminate the disadvantage that no longer pulled back mosquitoes Potter, by the reduction in size and construction space associated therewith drilling machine The object is to provide a drilling facility capable of reducing the construction cost.

穿孔設備の特徴構成は、コンクリート壁の被穿孔面を穿孔する円筒状のカッターを有する穿孔機と、前記被穿孔面に固定された分岐短管と、弁体を収容し、前記分岐短管に固定された弁ケースと、前記弁ケースに固定された作業ケースとを有し、前記穿孔機を水密状態で支持する筒状ガイド体と、を備え、前記カッターは、前記コンクリート壁の切片を内部に保持して前記切片の荷重を受け止め可能に構成されており、前記分岐短管の取付けフランジは、前記被穿孔面にアンカーボルトにより水密に固定されており、前記分岐短管の外周面は、コンクリート防護壁により前記被穿孔面に固定されている点にある。 The characteristic configuration of the drilling facility includes a drilling machine having a cylindrical cutter for drilling a drilled surface of a concrete wall, a branching short tube fixed to the drilled surface, a valve body, and the branching short tube A cylindrical guide body that has a fixed valve case and a work case fixed to the valve case and supports the drilling machine in a watertight state, and the cutter includes a section of the concrete wall inside The mounting flange of the branch short pipe is watertightly fixed to the drilled surface by an anchor bolt, and the outer peripheral surface of the branch short pipe is It is fixed to the drilled surface by a concrete protective wall .

本構成のように、弁体を収容する弁ケースが、穿孔機を水密状態で支持する筒状ガイド体に設けられることで、例えば、コンクリート壁の内部に貯水されている水面レベルよりも低い位置に貫通孔を形成する場合でも、穿孔時に流出する水の漏洩を回避しながらコンクリート壁に貫通孔を確実に形成することができる。また、カッター(穿孔機)を支持する筒状ガイド体は、穿孔工事後に設置する必要のある分岐短管および弁ケースを利用しているので、工事コスト面で有利に構成することができる。As in this configuration, the valve case that accommodates the valve body is provided in the cylindrical guide body that supports the drilling machine in a watertight state, for example, a position lower than the water level stored in the concrete wall. Even when the through hole is formed in the wall, it is possible to reliably form the through hole in the concrete wall while avoiding leakage of water flowing out during drilling. Further, the cylindrical guide body that supports the cutter (piercing machine) uses a branching short pipe and a valve case that need to be installed after the drilling work, and therefore can be advantageously configured in terms of construction cost.

さらに、カッターを有する穿孔機を支持する筒状ガイド体のうち、分岐短管がアンカーボルトおよびコンクリート防護壁によってコンクリート壁の被穿孔面に固定されている。このため、切片の荷重を受けたカッター(穿孔機)を筒状ガイド体で強固に支持することが可能となる。Further, among the cylindrical guide bodies that support the drilling machine having the cutter, the branch short pipe is fixed to the drilled surface of the concrete wall by an anchor bolt and a concrete protective wall. For this reason, it becomes possible to firmly support the cutter (piercing machine) that has received the load of the section with the cylindrical guide body.

したがって、穿孔径の大径化によって回収切片が重量化しても、筒状ガイド体が穿孔機を強固に支持するので、カッターが引き戻せなくなる不都合を解消することができるとともに、穿孔機の小型化とこれに伴う工事スペースの縮小化とによって工事コストの低廉化を達成することができる。 Therefore, even if the weight of collected intercept the large diameter of the perforation diameter, since the cylindrical guide member is firmly supported the drilling machine, it is possible to eliminate a disadvantage that not pulled back mosquitoes Potter, the puncture hole machine Construction costs can be reduced by downsizing and the reduction of construction space.

の特徴構成は、前記分岐短管は、前記カッターの外周面に摺接して前記カッターを回転軸芯方向に案内する摺接ガイド板が内周面に固定されている点にある。 Another characteristic configuration is that the branch short tube is fixed to the inner peripheral surface of a sliding contact guide plate that slides in contact with the outer peripheral surface of the cutter and guides the cutter in the rotation axis direction .

例えば、被穿孔面がカッターの回転軸芯に対する直交方向の垂直面に対して傾斜している場合では、穿孔開始時にカッターが片当たりになってぶれ易くなるが、本構成では、分岐短管の内周面にカッターを回転軸芯方向に案内する摺接ガイド板を設けているので、この摺接ガイド板をもってカッターの片当たりに起因するぶれを抑制することができ、カッターによる穿孔の安定化を図ることができる。For example, when the drilled surface is inclined with respect to a vertical plane perpendicular to the rotation axis of the cutter, the cutter is likely to come into contact with each other at the start of drilling. Since the sliding contact guide plate that guides the cutter in the direction of the axis of rotation is provided on the inner peripheral surface, the sliding contact guide plate can suppress blurring caused by the contact of the cutter and stabilize the drilling by the cutter. Can be achieved.

の特徴構成は、前記作業ケースは、前記カッターの外周面に摺接して前記カッターを回転軸芯方向に案内する丸鋼製の摺接ガイドレールが内周面に固定されており、前記摺接ガイドレールは、前記弁ケースの内周面まで延在している点にある。 According to another characteristic configuration, the work case has a sliding contact guide rail made of round steel that is slidably contacted with the outer peripheral surface of the cutter and guides the cutter in the direction of the rotation axis. The contact guide rail is in a point extending to the inner peripheral surface of the valve case .

上記構成によれば、カッターが、作業ケースおよび弁ケースの内周面に設けられた摺接ガイドレールによって初期位置にまで摺動案内されるため、穿孔機に作用する荷重を大幅に軽減することができる。 According to the above configuration, since the cutter is slidably guided to the initial position by the sliding contact guide rail provided on the inner peripheral surfaces of the work case and the valve case, the load acting on the drilling machine can be greatly reduced. Can do.

の特徴構成は、前記カッターの出退方向に沿って往復移動自在で、且つ、前記カッター及び前記カッターの内部に保持されている前記切片の荷重を受け止め可能な可動支持体を備えている点にある。 Another feature is that it includes a movable support that can reciprocate along the direction of withdrawal of the cutter and can receive the load of the cutter and the section held inside the cutter. It is in.

上記構成によれば、カッター及び切片の荷重は可動支持体でも受け止められる。したがって、穿孔径の大径化によって回収切片が重量化しても、穿孔機のスピンドルに作用する穿孔終了時の荷重負担を軽減することができるので、スピンドルの荷重による傾動や撓み変形によってカッターが引き戻せなくなる不都合を解消することができるとともに、スピンドルを大径化する必要がないため、穿孔機の小型化とこれに伴う工事スペースの縮小化とによって工事コストの低廉化を達成することができる。 According to the said structure, the load of a cutter and an intercept is received also with a movable support body. Therefore, even if the recovered section becomes heavier by increasing the diameter of the drilling hole, the load load at the end of drilling that acts on the spindle of the drilling machine can be reduced, so that the cutter is pulled by tilting or bending deformation due to the spindle load. In addition to eliminating the inconvenience that cannot be restored, it is not necessary to increase the diameter of the spindle, so that the construction cost can be reduced by downsizing the drilling machine and reducing the construction space associated therewith.

本発明の第1実施形態のコンクリート璧の穿孔方法における第1穿孔工程の水平断面図The horizontal sectional view of the 1st drilling process in the drilling method of the concrete wall of a 1st embodiment of the present invention. 穿孔設備の穿孔作業ケースの半断面側面図Semi-sectional side view of a drilling work case for a drilling facility 第2穿孔工程の水平断面図Horizontal sectional view of the second drilling process 図3におけるIV-IV線断面図IV-IV sectional view in FIG. 穿孔設備の第1可動支持筒の半断面側面図Half sectional side view of the first movable support cylinder of the drilling facility 穿孔設備の移動操作手段の拡大断面図Enlarged sectional view of moving operation means of drilling equipment 第3穿孔工程の水平断面図Horizontal sectional view of the third drilling process 図7におけるVIII-VIII線断面図VIII-VIII sectional view in FIG. 第4穿孔工程の水平断面図Horizontal sectional view of the fourth drilling process 穿孔設備の固定具の拡大断面図Expanded cross-sectional view of a fixture for drilling equipment 第5穿孔工程の水平断面図Horizontal sectional view of the fifth drilling process 穿孔設備の検知表示手段の検知直前の要部の拡大断面図Enlarged sectional view of the main part immediately before detection of the detection display means of the drilling equipment 穿孔設備の検知表示手段の検知直後の要部の拡大断面図Enlarged sectional view of the main part immediately after detection of the detection display means of the drilling equipment 第6穿孔工程の水平断面図Horizontal sectional view of the sixth drilling process 第7穿孔工程の水平断面図Horizontal sectional view of the seventh drilling process 第8穿孔工程の水平断面図Horizontal sectional view of the 8th drilling process 図16におけるXVII-XVII線断面図XVII-XVII line sectional view in FIG. 穿孔設備の第2可動支持筒の半断面側面図Half sectional side view of the second movable support cylinder of the drilling facility 第9穿孔工程の水平断面図Horizontal sectional view of the ninth drilling process 図19におけるXX-XX線断面図XX-XX line sectional view in FIG. 第10穿孔工程の水平断面図Horizontal sectional view of the 10th drilling process 第11穿孔工程の水平断面図Horizontal sectional view of the 11th drilling process 第12穿孔工程の水平断面図Horizontal sectional view of the 12th drilling process 第14穿孔工程の水平断面図Horizontal sectional view of the 14th drilling process 図24におけるXXV-XXV線断面図XXV-XXV cross-sectional view in FIG. 第15穿孔工程の水平断面図Horizontal sectional view of the 15th drilling process XXVII-XXVII線断面図XXVII-XXVII sectional view 第16穿孔工程の水平断面図Horizontal sectional view of the 16th drilling process 本発明の第2実施形態の説明図Explanatory drawing of 2nd Embodiment of this invention

〔第1実施形態〕
図1〜図28は、構造体の一例である鉄筋コンクリート製の貯水池のコンクリート壁Wのうち、貯水の水面レベルよりも下方部位に、貯水を抜き出すことなく円筒状のカッター(ホールソー)1で設定内径の管路接続用の貫通孔2を形成するコンクリート製構造体の穿孔方法、及び、その穿孔方法に使用される穿孔機Aと穿孔補助装置Bとを備えた穿孔設備を示す。
[First Embodiment]
FIGS. 1 to 28 show the inner diameter set by a cylindrical cutter (hole saw) 1 in a concrete wall W of a reinforced concrete reservoir, which is an example of a structural body, without draining water at a position below the water level of the water storage. The drilling method provided with the drilling machine A and the drilling assistance apparatus B which are used for the drilling method of the concrete structure which forms the through-hole 2 for this pipe line connection, and the drilling method is shown.

この穿孔方法では、コンクリート壁Wの被穿孔面Waに形成される貫通孔2が大径(当該実施形態では設定内径が1900mm)であるため、この貫通孔2を三段階(複数段階)に分けて形成する手順に設定してある。   In this drilling method, since the through-hole 2 formed in the drilled surface Wa of the concrete wall W has a large diameter (in this embodiment, the set inner diameter is 1900 mm), the through-hole 2 is divided into three stages (a plurality of stages). The procedure to be formed is set.

そのため、穿孔機Aのスピンドル3の先端部の装着される円筒状のカッター1として、貫通孔2の設定内径に該当する設定穿孔径(1900mm)のカッター1Aと、これの設定穿孔径よりも順次小径(穿孔径が1280mmと1690mm)となる2個のカッター1B,1Cとを準備する。   Therefore, as the cylindrical cutter 1 to which the tip of the spindle 3 of the drilling machine A is mounted, the cutter 1A having a set drilling diameter (1900 mm) corresponding to the set inner diameter of the through hole 2 and the set drilling diameter are sequentially set. Two cutters 1B and 1C having a small diameter (perforation diameters of 1280 mm and 1690 mm) are prepared.

そして、後述の穿孔工程において詳述するように、穿孔工程に伴って、穿孔機Aのスピンドル3に対して小径のカッター1Cから中径のカッター1B、設定穿孔径のカッター1Aに順次付け替えながら、コンクリート壁Wの被穿孔面Waに設定内径よりも小径の貫通孔2Aから穿孔して次に中径の貫通孔2Bを穿孔し,最終的には設定内径の貫通孔2を形成する設定にしてある。   And, as will be described in detail in the drilling process described later, along with the drilling process, while sequentially changing from the small diameter cutter 1C to the medium diameter cutter 1B and the set drilling diameter cutter 1A with respect to the spindle 3 of the drilling machine A, The concrete wall W is drilled from the through hole 2A having a diameter smaller than the set inner diameter, then the medium diameter through hole 2B is drilled, and finally the through hole 2 having the set inner diameter is formed. is there.

また、穿孔補助装置Bとして、穿孔機Aの円筒状のカッター1の出退方向に沿って往復移動自在で、且つ、カッター1及びこれの内部に保持されているコンクリート壁Wの切片4の荷重を受け止め可能な可動支持体Cと、この可動支持体Cをカッター出退方向に沿って移動案内する移動案内手段Dと、可動支持体Cを移動操作する移動操作手段Eとを準備する。   Further, as the drilling assisting device B, the load of the cutter 4 and the section 4 of the concrete wall W held inside the cutter 1 can be reciprocated along the retracting direction of the cylindrical cutter 1 of the drilling machine A. A movable support body C capable of receiving, a movement guide means D for moving and guiding the movable support body C along the cutter retracting direction, and a movement operation means E for moving the movable support body C are prepared.

可動支持体Cは、図3、図16に示すように、切片荷重が最大となる小径のカッター1Cを収納可能な第1可動支持筒C1と、切片荷重が二番目に大となる中径のカッター1Bを収納可能な第2可動支持筒C2とから構成され、切片荷重が最小となる設定穿孔径のカッター1Aによる穿孔時には、可動支持体Cを使用しない設定になっている。   As shown in FIGS. 3 and 16, the movable support C includes a first movable support cylinder C1 that can accommodate a small-diameter cutter 1C that maximizes the section load, and a medium-diameter that has the second largest section load. The second movable support cylinder C2 that can accommodate the cutter 1B is configured so that the movable support C is not used when drilling with the cutter 1A having a set bore diameter that minimizes the section load.

尚、設定穿孔径のカッター1Aを収納可能な第3可動支持筒を準備して、この第3可動支持筒に、設定穿孔径のカッター1A及びこれの内部に保持されているコンクリート壁Wの切片4の荷重を受け止め支持させ、この状態で第3可動支持筒と設定穿孔径のカッター1Aとを一緒に初期位置に引き戻すように構成してもよい。   A third movable support cylinder capable of storing a cutter 1A with a set perforation diameter is prepared, and a cutter 1A with a set perforation diameter and a section of the concrete wall W held therein are provided in the third movable support cylinder. 4 may be received and supported, and in this state, the third movable support cylinder and the cutter 1A having the set bore diameter may be pulled back to the initial position together.

可動支持体Cには、カッター1の駆動回転ならびに被穿孔面側への送り込み移動を摺接案内する摺接ガイド部Fが設けられ、この摺接ガイド部Fは、図4、図5に示すように、第1可動支持筒C1に装備される小径のカッター1C用の第1摺接ガイド部F1と、図17、図18に示すように、第2可動支持筒C2に装備される中径のカッター1B用の第2摺接ガイド部F2とから構成されている。   The movable support C is provided with a slidable contact guide portion F for slidably guiding the rotation of the cutter 1 and the feed movement toward the perforated surface. The slidable contact guide portion F is shown in FIGS. 4 and 5. As shown in FIGS. 17 and 18, the first sliding contact guide portion F1 for the small-diameter cutter 1C provided in the first movable support cylinder C1 and the medium diameter provided in the second movable support cylinder C2 are provided. And a second sliding contact guide portion F2 for the cutter 1B.

第1可動支持筒C1は、図3、図4に示すように、設定穿孔径のカッター1Aの外径と同径の外径に形成されている第1外側筒体10と、小径のカッター1Cの外径よりも若干大きな内径に形成されている第1内側筒体11、及び、第1外側筒体10と第1内側筒体11とを同心状態で固定連結する第1連結部材12とから構成されている。   As shown in FIGS. 3 and 4, the first movable support cylinder C1 includes a first outer cylindrical body 10 formed to have the same outer diameter as the outer diameter of the cutter 1A having a set perforation diameter, and a small diameter cutter 1C. A first inner cylinder 11 having an inner diameter slightly larger than an outer diameter of the first inner cylinder 11, and a first connecting member 12 that fixes and connects the first outer cylinder 10 and the first inner cylinder 11 concentrically. It is configured.

また、第1外側筒体10の底板10Aの中心部には、穿孔機Aのスピンドル3に対して脱着自在に取付けるための取付け部を構成する軸挿通孔15が形成されているとともに、第1外側筒体10の外周面における上側部位の周方向複数箇所(当該実施形態では2箇所)には、後述の移動案内手段Dの分岐短管31の内周面における上側部位の周方向複数箇所(当該実施形態では2箇所)に形成されている突条の係合案内部22と係合して、第1可動支持筒C1を一定の向き姿勢で分岐短管31の内周面に沿って小径のカッター1Cの出退方向に移動案内する被係合案内部23が形成されている。   In addition, a shaft insertion hole 15 is formed at the center of the bottom plate 10A of the first outer cylinder 10 so as to constitute an attachment portion for detachably attaching to the spindle 3 of the drilling machine A. In a plurality of circumferential locations (two locations in the present embodiment) in the upper portion of the outer peripheral surface of the outer cylindrical body 10, a plurality of circumferential locations in the upper portion of the inner circumferential surface of the branch short tube 31 of the movement guide means D (described later) ( In this embodiment, the first movable support cylinder C1 has a small diameter along the inner peripheral surface of the branch short tube 31 in a fixed orientation by engaging with the engagement guide portions 22 of the protrusions formed at two locations). An engaged guide portion 23 is formed for moving and guiding the cutter 1 </ b> C in the retracting direction.

この被係合案内部23は、図5、図8に示すように、第1外側筒体10の外周面の筒軸芯方向の3箇所の各々に、分岐短管31の係合案内部22と小径のカッター1Cの出退方向から係合可能な係合溝23Aを形成する一対の係合板23Bを固着して構成されているとともに、そのうち、コンクリート壁Wの被穿孔面Wa側に最も近接位置する両係合板23Bの端部23bが、第1可動支持筒C1が分岐短管31内に移入するときに分岐短管31の係合案内部22に対して係合誘導する拡開状の係合誘導部に構成されている。   As shown in FIGS. 5 and 8, the engaged guide portion 23 is provided at each of the three locations in the cylinder axis direction of the outer peripheral surface of the first outer cylindrical body 10. And a pair of engagement plates 23B that form engagement grooves 23A that can be engaged from the retracting direction of the small-diameter cutter 1C, and is closest to the drilled surface Wa side of the concrete wall W. The end portions 23b of the two engaging plates 23B positioned are in an expanded shape that induces engagement with the engagement guide portion 22 of the branch short tube 31 when the first movable support cylinder C1 moves into the branch short tube 31. It is comprised by the engagement induction | guidance | derivation part.

第1可動支持筒C1の第1内側筒体11の内周面における下側部位の周方向複数箇所(当該実施形態では周方向の2箇所)には、第1内側筒体11の筒軸芯方向に沿う突条の第1ガイド取付け部13が形成され、各第1ガイド取付け部13には、小径のカッター1Cの外周面における下側部位に当接して当該カッター1Cの駆動回転ならびに筒軸芯方向の移動を摺接状態で案内する樹脂製の第1摺接ガイド板14が取付けられている。   The cylinder axis of the first inner cylinder 11 is provided at a plurality of circumferential locations (two locations in the circumferential direction in the present embodiment) in the lower part of the inner peripheral surface of the first inner cylinder 11 of the first movable support cylinder C1. A first guide mounting portion 13 having a ridge extending along the direction is formed, and each first guide mounting portion 13 is in contact with the lower portion of the outer peripheral surface of the small-diameter cutter 1C to drive and rotate the cutter 1C and the cylinder shaft. A resin-made first sliding contact guide plate 14 for guiding the movement in the core direction in a sliding contact state is attached.

この周方向で複数対の第1ガイド取付け部13と第1摺接ガイド板14とをもって、小径のカッター1Cの駆動回転ならびに被穿孔面側への送り込み移動を摺接案内する第1摺接ガイド部F1が構成されている。
尚、第1ガイド取付け部13及び第1摺接ガイド板14の各周方向幅が長くて所期のガイド機能を確実に発揮できる場合には、この第1ガイド取付け部13及び第1摺接ガイド板14を、第1可動支持筒C1の第1内側筒体11の内周面における下側部位の一箇所に設けて実施してもよい。
A first slidable contact guide for slidably guiding the rotation of the small-diameter cutter 1C and the feed movement toward the perforated surface side with a plurality of pairs of first guide attachment portions 13 and first slidable contact guide plates 14 in the circumferential direction. Part F1 is configured.
When the circumferential width of each of the first guide mounting portion 13 and the first sliding contact guide plate 14 is long and the desired guide function can be surely exhibited, the first guide mounting portion 13 and the first sliding contact guide plate 14 are provided. The guide plate 14 may be provided at one location on the lower portion of the inner peripheral surface of the first inner cylinder 11 of the first movable support cylinder C1.

第1可動支持筒C1の第1摺接ガイド板14に、小径のカッター1Cの外周面における下側部位が当接した状態では、この第1可動支持筒C1の筒軸芯と小径のカッター1Cの回転軸芯とが合致する。   In a state where the lower portion of the outer peripheral surface of the small diameter cutter 1C is in contact with the first sliding contact guide plate 14 of the first movable support cylinder C1, the cylinder axis of the first movable support cylinder C1 and the small diameter cutter 1C Matches the axis of rotation.

第2可動支持筒C2は、図17、図18に示すように、設定穿孔径のカッター1Aの外径と同径の外径に形成されている第2外側筒体16と、中径のカッター1Bの外径よりも若干大きな内径に形成されている第2内側筒体17、及び、第2外側筒体16と第2内側筒体17とを同心状態で固定連結する第2連結部材18とから構成されている。   As shown in FIGS. 17 and 18, the second movable support cylinder C <b> 2 includes a second outer cylinder 16 formed to have the same outer diameter as the outer diameter of the cutter 1 </ b> A having a set perforation diameter, and a medium diameter cutter. A second inner cylinder 17 formed to have an inner diameter slightly larger than the outer diameter of 1B, and a second connecting member 18 that fixedly connects the second outer cylinder 16 and the second inner cylinder 17 concentrically. It is composed of

また、第2外側筒体16の底板16Aの中心部には、穿孔機Aのスピンドル3に対して脱着自在に取付けるための取付け部を構成する軸挿通孔15が形成されているとともに、第2外側筒体16の外周面における上側部位の周方向複数箇所(当該実施形態では2箇所)には、後述の移動案内手段Dの分岐短管31の内周面における上側部位の周方向複数箇所(当該実施形態では2箇所)に形成されている突条の係合案内部22と係合して、第2可動支持筒C2を一定の向き姿勢で分岐短管31の周方向内周面に沿って中径のカッター1Bの出退方向に移動案内する被係合案内部24が形成されている。   In addition, a shaft insertion hole 15 is formed at the center of the bottom plate 16A of the second outer cylindrical body 16 so as to constitute a mounting portion for detachably mounting to the spindle 3 of the drilling machine A, and the second In a plurality of circumferential locations (two locations in the present embodiment) in the upper portion of the outer peripheral surface of the outer cylindrical body 16, a plurality of circumferential locations in the upper portion of the inner circumferential surface of the branch short tube 31 (described later) ( In the present embodiment, the second movable support cylinder C2 is engaged with the engagement guide portions 22 of the protrusions formed at two locations) along the circumferential inner peripheral surface of the branch short tube 31 in a fixed orientation. Thus, an engaged guide portion 24 for moving and guiding the cutter in the middle diameter 1 </ b> B is formed.

この被係合案内部24は、図4、図5に示すように、前述の第1可動支持筒C1の被係合案内部23と同じ構造で、第2外側筒体16の外周面の筒軸芯方向の3箇所の各々に、分岐短管31の係合案内部22とカッター1Bの出退方向から係合可能な係合溝24Aを形成する一対の係合板24Bを固着して構成されているとともに、そのうち、コンクリート壁Wの被穿孔面Wa側に最も近接位置する両係合板24Bの端部24bが、第2可動支持筒C2が分岐短管31内に移入するときに分岐短管31の係合案内部22に対して係合誘導する拡開状の係合誘導部に構成されている。   As shown in FIGS. 4 and 5, the engaged guide portion 24 has the same structure as the engaged guide portion 23 of the first movable support cylinder C <b> 1 described above, and the cylinder on the outer peripheral surface of the second outer cylindrical body 16. A pair of engagement plates 24B that form an engagement groove 24A that can be engaged from the engagement guide portion 22 of the branch short tube 31 and the direction in which the cutter 1B is retracted are fixed to each of the three locations in the axial direction. Among them, the end portions 24b of the both engagement plates 24B closest to the perforated surface Wa side of the concrete wall W are used when the second movable support cylinder C2 moves into the branch short pipe 31. It is comprised in the expansion-shaped engagement guidance part which carries out engagement guidance with respect to the 31 engagement guide parts 22. FIG.

第2可動支持筒C2の第2内側筒体17の内周面における下側部位の周方向複数箇所(当該実施形態では周方向の3箇所)には、第2内側筒体17の筒軸芯方向に沿う突条の第2ガイド取付け部19が形成され、各ガイド取付け部19には、中径のカッター1Bの外周面における下側部位に当接して当該カッター1Bの駆動回転ならびに筒軸芯方向の移動を摺接状態で案内する樹脂製の第2摺接ガイド板20を取付けてある。   The cylinder axis of the second inner cylindrical body 17 is provided at a plurality of circumferential positions (three positions in the circumferential direction in the present embodiment) in the lower part of the inner peripheral surface of the second inner cylindrical body 17 of the second movable support cylinder C2. A second guide attachment portion 19 having a ridge extending along the direction is formed, and each guide attachment portion 19 abuts on a lower portion of the outer peripheral surface of the medium-diameter cutter 1B to drive and rotate the cutter 1B and the cylinder axis. A resin-made second sliding contact guide plate 20 for guiding the movement in the direction in sliding contact is attached.

この周方向で複数対の第2ガイド取付け部19と第2摺接ガイド板20とをもって、中径のカッター1Bの駆動回転ならびに被穿孔面側への送り込み移動を摺接案内する第2摺接ガイド部F2が構成されている。
尚、第2ガイド取付け部19及び第2摺接ガイド板20の各周方向幅が長くて所期のガイド機能を確実に発揮できる場合には、この第2ガイド取付け部19及び第2摺接ガイド板20を、第2可動支持筒C2の第2内側筒体17の内周面における下側部位の一箇所に設けて実施してもよい。
In this circumferential direction, a plurality of second guide mounting portions 19 and second sliding contact guide plates 20 are used to slide and guide the driving rotation of the medium-diameter cutter 1B and the feed movement toward the drilled surface. A guide portion F2 is configured.
When the circumferential widths of the second guide mounting portion 19 and the second sliding contact guide plate 20 are long and the desired guide function can be surely exhibited, the second guide mounting portion 19 and the second sliding contact guide plate 20 The guide plate 20 may be provided at one location on the lower portion of the inner peripheral surface of the second inner cylinder 17 of the second movable support cylinder C2.

第2可動支持筒C2の第2摺接ガイド板20に中径のカッター1Bの外周面における下側部位が当接した状態では、この第2可動支持筒C2の筒軸芯と中径のカッター1Bの回転軸芯とが合致する。   In a state in which the lower portion of the outer peripheral surface of the medium diameter cutter 1B is in contact with the second sliding contact guide plate 20 of the second movable support cylinder C2, the cylinder axis of the second movable support cylinder C2 and the medium diameter cutter The rotation axis of 1B matches.

移動案内手段Dは、図1、図2に示すように、コンクリート壁Wの被穿孔面Waに対してカッター1の回転軸芯と同芯状態で固定配設された筒状ガイド体D1から構成されている。
この筒状ガイド体D1は、コンクリート壁Wの被穿孔面Waに水密状態でアンカーボルト30にて固定される取付けフランジ31Aを備えた分岐短管31と、この分岐短管31の他端部の下流側連結フランジ31Bに水密状態でボルト34・ナット35にて固定連結される上流側連結フランジ32Aを備えた仕切弁32の筒状の弁ケース32Cと、この仕切弁32の他端部に形成された下流側連結フランジ32Bに水密状態でボルト34・ナット35にて固定連結される上流側連結フランジ33Aを備えた穿孔作業ケース33とから構成され、そのうち、分岐短管31及び穿孔作業ケース33は、カッター1及び可動支持体Cを収納可能な長さに構成されている。
As shown in FIGS. 1 and 2, the movement guide means D is composed of a cylindrical guide body D <b> 1 fixedly disposed in a concentric state with the rotation axis of the cutter 1 with respect to the perforated surface Wa of the concrete wall W. Has been.
The cylindrical guide body D1 includes a branch short pipe 31 provided with a mounting flange 31A that is fixed to the perforated surface Wa of the concrete wall W by an anchor bolt 30 in a watertight state, and the other end of the branch short pipe 31. A cylindrical valve case 32C of the gate valve 32 provided with an upstream side connection flange 32A fixedly connected to the downstream side connection flange 31B with bolts 34 and nuts 35 in a watertight state, and formed at the other end of the gate valve 32. The drilling work case 33 is provided with an upstream connection flange 33A fixedly connected to the downstream connection flange 32B by a bolt 34 and a nut 35 in a watertight state. Is configured to have a length capable of accommodating the cutter 1 and the movable support C.

穿孔作業ケース33には、それの下流側フランジ33Bに水密状態でボルト34・ナット35にて固定連結される蓋体33Cが備えられている。   The drilling work case 33 is provided with a lid 33C fixedly connected to the downstream flange 33B of the drilling work case 33 with bolts 34 and nuts 35 in a watertight state.

分岐短管31の内周面における下側部位の周方向複数箇所(当該実施形態では周方向の5箇所)には、当該分岐短管31の筒軸芯方向に沿う突条の第3ガイド取付け部37が形成され、各第3ガイド取付け部37には、設定穿孔径のカッター1Aの外周面における下側部位、又は、第1可動支持筒C1の第1外側筒体10の外周面における下側部位、若しくは、第2可動支持筒C2の第2外側筒体16の外周面における下側部位と当接して、設定穿孔径のカッター1A又は第1可動支持筒C1若しくは第2可動支持筒C2をカッター1の回転軸芯方向に摺接状態で移動案内する樹脂製の第3摺接ガイド板38を取付けてある。   A third guide attachment of a ridge along the axial direction of the branch short tube 31 at a plurality of circumferential locations (5 in the embodiment in the circumferential direction) of the lower portion of the inner peripheral surface of the branch short tube 31 A portion 37 is formed, and each third guide attachment portion 37 has a lower portion on the outer peripheral surface of the cutter 1A having a set perforation diameter or a lower portion on the outer peripheral surface of the first outer cylindrical body 10 of the first movable support cylinder C1. The side part or the lower part of the outer peripheral surface of the second outer cylindrical body 16 of the second movable support cylinder C2 comes into contact with the cutter 1A, the first movable support cylinder C1 or the second movable support cylinder C2 having a set perforation diameter. A resin-made third slidable contact guide plate 38 is attached to move and guide the cutter in the slidable contact state in the direction of the rotational axis of the cutter 1.

この周方向で複数対の第3ガイド取付け部37と第3摺接ガイド板38とをもって、設定穿孔径のカッター1Aの駆動回転ならびに出退移動を摺接案内し、且つ、第1可動支持筒C1又は第2可動支持筒C2の出退移動を摺接案内する第3摺接ガイド部F3が構成されている。
尚、第3ガイド取付け部37及び第3摺接ガイド板38の各周方向幅が長くて所期のガイド機能を確実に発揮できる場合には、この第3ガイド取付け部37及び第3摺接ガイド板38を、分岐短管31の内周面における下側部位の一箇所に設けて実施してもよい。
A plurality of pairs of third guide mounting portions 37 and third sliding contact guide plates 38 in this circumferential direction slide and guide the drive rotation and retreat movement of the cutter 1A having a set perforation diameter, and the first movable support cylinder A third sliding contact guide portion F3 is configured to guide sliding movement of the C1 or the second movable support cylinder C2.
In addition, when each circumferential width of the third guide mounting portion 37 and the third sliding contact guide plate 38 is long and the desired guide function can be surely exhibited, the third guide mounting portion 37 and the third sliding contact guide plate 38 The guide plate 38 may be provided at one position on the lower side of the inner peripheral surface of the branch short tube 31.

分岐短管31の複数の第3摺接ガイド板38に、設定穿孔径のカッター1Aの外周面における下側部位、又は、第1可動支持筒C1の第1外側筒体10の外周面における下側部位、若しくは、第2可動支持筒C2の第2外側筒体16の外周面における下側部位が当接した状態では、分岐短管31の管軸芯と設定穿孔径のカッター1Aの回転軸芯又は第1可動支持筒C1の筒軸芯若しくは第2可動支持筒C2の筒軸芯とが合致する。   A plurality of third sliding contact guide plates 38 of the branch short pipe 31 are provided on the lower portion of the outer peripheral surface of the cutter 1A having a set perforation diameter, or the lower portion of the first outer cylindrical body 10 of the first movable support cylinder C1. In a state in which the lower portion of the outer peripheral surface of the second outer cylindrical body 16 of the second movable support cylinder C2 is in contact with the side portion, the axis of the branch short tube 31 and the rotation axis of the cutter 1A having the set bore diameter The core or the cylinder axis of the first movable support cylinder C1 matches the cylinder axis of the second movable support cylinder C2.

また、分岐短管31の内周面における上側部位の周方向複数箇所(当該実施形態では周方向の2箇所)には、突条の係合案内部22を構成する丸鋼製の係合レールがカッター1の回転軸芯方向に沿って固着されている。   Further, round steel engagement rails that form the engagement guide portions 22 of the ridges are provided at a plurality of circumferential locations (two locations in the circumferential direction in the present embodiment) on the inner peripheral surface of the branch short tube 31. Is fixed along the rotation axis direction of the cutter 1.

穿孔作業ケース33の内周面における下側部位の周方向複数箇所(当該実施形態では周方向の2箇所)には、設定穿孔径のカッター1Aの外周面における下側部位、又は、第1可動支持筒C1の第1外側筒体10の外周面における下側部位、若しくは、第2可動支持筒C2の第2外側筒体16の外周面における下側部位と当接して、設定穿孔径のカッター1A又は第1可動支持筒C1若しくは第2可動支持筒C2をカッター1の回転軸芯方向に摺接状態で移動案内する丸鋼製の摺接ガイドレール39を取付けてある。   At a plurality of circumferential locations (two locations in the circumferential direction in the embodiment) of the lower portion of the inner peripheral surface of the drilling work case 33, the lower portion of the outer peripheral surface of the cutter 1A having the set drill diameter or the first movable A cutter having a set perforation diameter in contact with the lower part of the outer peripheral surface of the first outer cylinder 10 of the support cylinder C1 or the lower part of the outer peripheral surface of the second outer cylinder 16 of the second movable support cylinder C2. A slidable contact guide rail 39 made of round steel is attached to move and guide 1A or the first movable support cylinder C1 or the second movable support cylinder C2 in a sliding contact state in the direction of the rotation axis of the cutter 1.

この周方向で複数の摺接ガイドレール39をもって、設定穿孔径のカッター1Aと第1可動支持筒C1及び第2可動支持筒C2を回転軸芯方向に沿って出退移動自在に摺接案内する第4摺接ガイド部F4が構成されている。   With a plurality of sliding contact guide rails 39 in the circumferential direction, the cutter 1A having the set perforation diameter, the first movable support cylinder C1, and the second movable support cylinder C2 are slidably guided to move in and out along the rotation axis direction. A fourth sliding contact guide portion F4 is configured.

穿孔作業ケース33の摺接ガイドレール39に、設定穿孔径のカッター1Aの外周面における下側部位、又は、第1可動支持筒C1の第1外側筒体10の外周面における下側部位、若しくは、第2可動支持筒C2の第2外側筒体16の外周面における下側部位が当接した状態では、穿孔作業ケース33の筒軸芯と設定穿孔径のカッター1Aの回転軸芯又は第2可動支持筒C2の筒軸芯若しくは第2可動支持筒C2の筒軸芯とが合致する。   On the sliding contact guide rail 39 of the drilling work case 33, the lower part of the outer peripheral surface of the cutter 1A having the set drilling diameter, or the lower part of the outer peripheral surface of the first outer cylindrical body 10 of the first movable support cylinder C1, or In the state where the lower part of the outer peripheral surface of the second outer cylindrical body 16 of the second movable support cylinder C2 is in contact, the cylinder axis of the drilling work case 33 and the rotation axis of the cutter 1A having the set drilling diameter or the second The cylinder axis of the movable support cylinder C2 matches the cylinder axis of the second movable support cylinder C2.

摺接ガイドレール39の被穿孔面Wa側の端部は、穿孔作業ケース33の上流側端部よりも突出して仕切弁32の弁ケース32C内における弁体32Dよりも下流側領域に入り込み配置され、穿孔作業ケース33と分岐短管31との間での設定穿孔径のカッター1A又は第2可動支持筒C2若しくは第2可動支持筒C2の移動が確実、円滑に行えるように構成してある。   The end of the slidable contact guide rail 39 on the drilled surface Wa side protrudes from the upstream end of the drilling work case 33 and enters the downstream region of the valve body 32D in the valve case 32C of the gate valve 32. The cutter 1A or the second movable support cylinder C2 or the second movable support cylinder C2 having a set drilling diameter between the drilling work case 33 and the branch short pipe 31 is configured to be surely and smoothly moved.

また、穿孔作業ケース33の筒軸芯方向中間部には、穿孔時の切り屑等を外部に排出するための排出管部33Dが一体形成され、穿孔時には、この排出管部33Dに開閉バルブを備えた排水管が接続される。   In addition, a discharge pipe portion 33D for discharging chips and the like during drilling to the outside is integrally formed at the middle portion in the cylinder axis direction of the drilling work case 33, and an opening / closing valve is provided in the discharge pipe portion 33D during drilling. The provided drainage pipe is connected.

移動操作手段Eは、可動支持体Cである第1可動支持筒C1又は第2可動支持筒C2をコンクリート壁Wの被穿孔面Wa側に近接する分岐短管31内の穿孔作業位置と被穿孔面Waから離間した穿孔作業ケース33内の初期位置とに押し引き操作可能な操作ロッド機構40と、可動支持体Cを分岐短管31内の穿孔作業位置で固定する固定具50とから構成されているとともに、この移動操作手段Eには、穿孔が終了した小径のカッター1C又は中径のカッター1Bが第1可動支持筒C1又は第2可動支持筒C2の所定位置に戻り移動したことを検知表示する検知表示手段Gが設けられている。   The moving operation means E includes the first movable support cylinder C1 or the second movable support cylinder C2, which is the movable support C, and the drilling work position and the drilled hole in the branch short pipe 31 close to the drilled surface Wa side of the concrete wall W. The operation rod mechanism 40 can be pushed and pulled to the initial position in the drilling work case 33 separated from the surface Wa, and the fixture 50 that fixes the movable support C at the drilling work position in the branch short pipe 31. In addition, the moving operation means E detects that the small-diameter cutter 1C or the medium-diameter cutter 1B that has finished drilling has moved back to the predetermined position of the first movable support cylinder C1 or the second movable support cylinder C2. Detection display means G for displaying is provided.

操作ロッド機構40の押し引き操作により、第1可動支持筒C1又は第2可動支持筒C2を被穿孔面Wa側に近接する分岐短管31内の穿孔作業位置と被穿孔面Waから離間した穿孔作業ケース33内の初期位置とに小径のカッター1C又は中径のカッター1Bの出退方向に沿って往復移動させることができるとともに、分岐短管31内の穿孔作業位置に移動した第1可動支持筒C1又は第2可動支持筒C2を固定具50で確実に固定することができる。   By the push-pull operation of the operating rod mechanism 40, the first movable support cylinder C1 or the second movable support cylinder C2 is drilled away from the drilling surface Wa and the drilling surface Wa in the branch short pipe 31 close to the drilled surface Wa side. A first movable support that can be reciprocated along the direction in which the small-diameter cutter 1C or the medium-diameter cutter 1B moves in and out of the initial position in the work case 33 and that has moved to the drilling work position in the branch short tube 31. The cylinder C1 or the second movable support cylinder C2 can be securely fixed by the fixture 50.

操作ロッド機構40を構成するに、図6、図7に示すように、カッター1の回転軸芯方向に沿う各操作ロッド42の一端部には、穿孔機Aのスピンドル3に脱着可能に装着された径方向に沿う支持アーム41の端部に当接して、第1可動支持筒C1又は第2可動支持筒C2に作用する水圧による戻し移動を阻止する当て板44が、ボルト43で脱着自在に固定されている。   As shown in FIGS. 6 and 7, the operation rod mechanism 40 is configured to be detachably attached to the spindle 3 of the drilling machine A at one end of each operation rod 42 along the rotational axis direction of the cutter 1. The abutting plate 44 that abuts against the end of the support arm 41 along the radial direction and prevents the return movement due to water pressure acting on the first movable support cylinder C1 or the second movable support cylinder C2 is detachable by a bolt 43. It is fixed.

各当て板44に取付けられた操作ロッド42は、穿孔作業ケース33の蓋体33Cに貫通形成された軸挿通孔33aに移動自在に挿通されたのち、第1可動支持筒C1の第1外側筒体10の底板10Aに形成された第1軸挿通孔10a又は第2可動支持筒C2の第2外側筒体16の底板16Aに形成された第2軸挿通孔16aに摺動自在に貫通支持されている。   The operation rod 42 attached to each contact plate 44 is movably inserted into a shaft insertion hole 33a formed through the lid 33C of the drilling work case 33, and then the first outer cylinder of the first movable support cylinder C1. The first shaft insertion hole 10a formed on the bottom plate 10A of the body 10 or the second shaft insertion hole 16a formed on the bottom plate 16A of the second outer cylindrical body 16 of the second movable support cylinder C2 is slidably supported. ing.

操作ロッド42の他端側には、穿孔作業ケース33の蓋体33Cをコンクリート壁Wの被穿孔面Wa側に向かって押圧する押圧部材45が設けられているとともに、操作ロッド42が連結可能な複数本の分割ロッド42Aから構成されている。   On the other end side of the operation rod 42, a pressing member 45 that presses the lid 33 </ b> C of the drilling work case 33 toward the drilled surface Wa side of the concrete wall W is provided, and the operation rod 42 can be connected. It is composed of a plurality of split rods 42A.

各分割ロッド42Aの一端部には、他の分割ロッド42Aの他端部に形成された雄ネジ部42aと螺合連結可能な雌ネジ部42bが形成され、他端部には、他の分割ロッド42Aの一端部に形成された雌ネジ部42bと螺合連結可能な雄ネジ部42aが形成されている。   One end of each split rod 42A is formed with a female screw portion 42b that can be screwed and connected to a male screw portion 42a formed at the other end of the other split rod 42A. A male screw portion 42a that can be screwed and connected to a female screw portion 42b formed at one end of the rod 42A is formed.

そして、操作ロッド機構40の操作ロッド42が連結可能な複数本の分割ロッド42Aから構成することにより、初期位置にある第1可動支持筒C1又は第2可動支持筒C2と穿孔機Aの穿孔機本体5とのスペースが狭い施工条件下においても、分割ロッド42Aの継足し連結操作又は連結解除操作により、第1可動支持筒C1又は第2可動支持筒C2を穿孔作業位置と初期位置とに確実に移動させることができる。   Then, the first movable support cylinder C1 or the second movable support cylinder C2 in the initial position and the punching machine of the punching machine A are configured by a plurality of split rods 42A to which the operating rod 42 of the operating rod mechanism 40 can be connected. Even under construction conditions in which the space with the main body 5 is narrow, the first movable support cylinder C1 or the second movable support cylinder C2 can be surely placed at the drilling work position and the initial position by adding or releasing the split rod 42A. Can be moved to.

固定具50を構成するに、図10に示すように、第1可動支持筒C1又は第2可動支持筒C2が分岐短管31内の穿孔作業位置に位置する状態において、支持アーム41が撤去された操作ロッド42の一端部に固定板51がボルト43で締付け固定されている。   As shown in FIG. 10, the support arm 41 is removed when the first movable support cylinder C <b> 1 or the second movable support cylinder C <b> 2 is located at the drilling work position in the branch short pipe 31. A fixing plate 51 is fastened and fixed to one end portion of the operating rod 42 with a bolt 43.

穿孔作業ケース33の蓋体33Cの外側面に固着された取付け座52に一対の固定ボルト53が螺合固定され、各固定ボルト53の基端部側には、操作ロッド42の外周面との間及び取付け座52の外側面との間をそれぞれ水密にするOリング54を備えた遮蔽板55と、この遮蔽板55を取付け座52に締付け固定する二つのナット56とが設けられている。   A pair of fixing bolts 53 are screwed and fixed to a mounting seat 52 fixed to the outer surface of the lid 33C of the drilling work case 33, and the base end side of each fixing bolt 53 is connected to the outer peripheral surface of the operation rod 42. A shielding plate 55 provided with an O-ring 54 that makes the space between each other and the outer surface of the mounting seat 52 watertight, and two nuts 56 that fasten and fix the shielding plate 55 to the mounting seat 52 are provided.

各固定ボルト53の先端部側は固定板51に挿通され、二つのナット57で固定板51に締付け固定されている。   The distal end side of each fixing bolt 53 is inserted into the fixing plate 51 and is fastened and fixed to the fixing plate 51 with two nuts 57.

検知表示手段Gを構成するに、図12、図13に示すように、操作ロッド42の他端部に、初期位置に戻り移動する小径のカッター1Cの底板1c又は中径のカッター1Bの底板1bと当接可能な領域に突出する検知アーム60をナット61で締付け固定する。   As shown in FIGS. 12 and 13, the detection display means G is configured such that the bottom plate 1 c of the small-diameter cutter 1 </ b> C or the bottom plate 1 b of the medium-diameter cutter 1 </ b> B moves back to the initial position at the other end of the operation rod 42. The detection arm 60 that protrudes into the region where it can abut is fastened and fixed with a nut 61.

この検知アーム60と第1可動支持筒C1の第1外側筒体10の底板10Aに形成された第1当接部10b又は第2可動支持筒C2の第2外側筒体16の底板16Aに形成された第2当接部との間に、固定具50が固定解除されている操作ロッド42の設定範囲での検知作動を許容する空隙Sが形成されている。   The detection arm 60 and the first contact portion 10b formed on the bottom plate 10A of the first outer cylinder 10 of the first movable support cylinder C1 or the bottom plate 16A of the second outer cylinder 16 of the second movable support cylinder C2 are formed. A gap S is formed between the second contact portion and the second contact portion. The gap S allows the detection operation within the set range of the operation rod 42 from which the fixing tool 50 is unfixed.

操作ロッド42が空隙Sの範囲で検知作動すると、小径のカッター1Cの底板1c又は中径のカッター1Bの底板1bで押圧されている検知アーム60が第1可動支持筒C1の底板10A又は第2可動支持筒C2の底板16Aに当接し、それ以降は、小径のカッター1C又は中径のカッター1Bと第1可動支持筒C1又は第2可動支持筒C2とが一緒に戻り移動するように構成されている。   When the operation rod 42 detects and operates within the gap S, the detection arm 60 pressed by the bottom plate 1c of the small-diameter cutter 1C or the bottom plate 1b of the medium-diameter cutter 1B is the bottom plate 10A of the first movable support cylinder C1 or the second plate. After contacting the bottom plate 16A of the movable support cylinder C2, the small diameter cutter 1C or the medium diameter cutter 1B and the first movable support cylinder C1 or the second movable support cylinder C2 are configured to move back together. ing.

そして、操作ロッド42が空隙Sの範囲で検知作動すると、切片4を保持する小径のカッター1C又は中径のカッター1Bが第1可動支持筒C1又は第2可動支持筒C2の所定位置に正確に戻り移動したことを目視で確認することができる。   When the operation rod 42 is detected and operated in the range of the gap S, the small-diameter cutter 1C or the medium-diameter cutter 1B that holds the section 4 is accurately positioned at a predetermined position of the first movable support cylinder C1 or the second movable support cylinder C2. It is possible to visually confirm that it has moved back.

次に、上述の如く構成された穿孔設備を準備して、鉄筋コンクリート製の貯水池のコンクリート壁Wのうち、貯水の水面レベルよりも下方部位に、貯水を抜き出すことなく円筒状のカッター1で設定内径の管路接続用の貫通孔2を形成するコンクリート製構造体の穿孔方法について説明する。   Next, the drilling equipment configured as described above is prepared, and the inner diameter set by the cylindrical cutter 1 is taken out of the concrete wall W of the reinforced concrete reservoir below the level of the stored water without draining the stored water. A method for drilling a concrete structure that forms the through-hole 2 for pipe connection will be described.

[1]第1穿孔工程
図1に示すように、コンクリート壁Wの被穿孔面Waに、筒状ガイド体D1を構成する分岐短管31と仕切弁32及び穿孔作業ケース33とのうち、分岐短管31の取付けフランジ31Aを、カッター1の回転軸芯と同芯にした状態でアンカーボルト30によって水密に固定する。
[1] First drilling step As shown in FIG. 1, a branching pipe 31, a gate valve 32, and a drilling work case 33 that form the cylindrical guide body D <b> 1 are branched into the drilled surface Wa of the concrete wall W. The mounting flange 31 </ b> A of the short pipe 31 is fixed in a watertight manner by the anchor bolt 30 in a state where it is concentric with the rotational axis of the cutter 1.

この分岐短管31は、コンクリート壁Wの鉄筋に補強鉄筋を溶接等で固着連結したのち、仮想線で示すように、現場打ちのコンクリートで構築されるコンクリート防護壁6により分岐短管31の基部側をコンクリート壁Wに強固に固定する。   The branch short pipe 31 is a base part of the branch short pipe 31 formed by a concrete protective wall 6 made of on-site concrete, as shown by an imaginary line, after reinforcing reinforcing bars are fixedly connected to the reinforcing bars of the concrete wall W by welding or the like. The side is firmly fixed to the concrete wall W.

その後、分岐短管31の下流側連結フランジ31Bに、仕切弁32の上流側連結フランジ32Aをボルト34・ナット35によって同心状態で水密に固定連結するとともに、仕切弁32の下流側連結フランジ32Bには、穿孔作業ケース33の上流側連結フランジ33Aをボルト34・ナット35によって同心状態で水密に固定連結する。   Thereafter, the upstream connection flange 32A of the gate valve 32 is fixedly connected to the downstream connection flange 31B of the branch short pipe 31 by a bolt 34 and a nut 35 in a watertight manner, and the downstream connection flange 32B of the gate valve 32 is connected to the downstream connection flange 32B. Are fixedly connected in a watertight manner in a concentric state by the bolt 34 and the nut 35 on the upstream side connecting flange 33A of the drilling work case 33.

仕切弁32は、作業用仕切弁として機能し、第1可動支持筒C1又は第2可動支持筒C2をカッター出退方向に沿って移動案内する機能を備えた分岐短管31と穿孔作業ケース33とを結合する機能を有する。   The gate valve 32 functions as a work gate valve and has a branch short pipe 31 and a drilling work case 33 having a function of moving and guiding the first movable support cylinder C1 or the second movable support cylinder C2 along the cutter retracting direction. And has a function of combining.

[2]第2穿孔工程
図3に示すように、穿孔機Aのスピンドル3の先端部に小径(穿孔径が1280mm)のカッター1Cを取付けるとともに、スピンドル3には、小径のカッター1Cを収納可能な第1可動支持筒C1を取付け、この小径のカッター1C及び第1可動支持筒C1を穿孔作業ケース33内の初期位置に配置する。
[2] Second drilling step As shown in FIG. 3, a cutter 1C having a small diameter (a drilling diameter of 1280 mm) is attached to the tip of the spindle 3 of the drilling machine A, and the spindle 3 can accommodate a small diameter cutter 1C. The first movable support cylinder C1 is attached, and the small-diameter cutter 1C and the first movable support cylinder C1 are arranged at the initial position in the drilling work case 33.

小径のカッター1Cの外周面における下側部位は、図4に示すように、第1可動支持筒C1の第1摺接ガイド板14に摺動可能な状態で載置支持され、この小径のカッター1Cの回転軸芯と第1可動支持筒C1の筒軸芯とが合致した状態にある。   As shown in FIG. 4, the lower part of the outer peripheral surface of the small-diameter cutter 1C is placed and supported by the first sliding contact guide plate 14 of the first movable support cylinder C1 in a slidable state. The rotational axis of 1C and the cylinder axis of the first movable support cylinder C1 are in agreement.

また、第1可動支持筒C1の第1外側筒体10の外周面における下側部位は、穿孔作業ケース33の第4摺接ガイド部F4の摺接ガイドレール39に摺動可能な状態で載置支持され、この第1可動支持筒C1の筒軸芯と穿孔作業ケース33の筒軸芯とが合致した状態にある。   Further, the lower part of the outer peripheral surface of the first outer cylindrical body 10 of the first movable support cylinder C1 is slidably mounted on the sliding contact guide rail 39 of the fourth sliding contact guide portion F4 of the drilling work case 33. The cylinder axis of the first movable support cylinder C1 and the cylinder axis of the drilling work case 33 are in agreement with each other.

そして、図6に示すように、穿孔作業ケース33の穿孔機A側の開口を蓋体33Cで閉塞し、この蓋体33Cに貫通形成されている軸挿通孔33aを通して、第1可動支持筒C1の第1外側筒体10の底板10Aと穿孔機Aのスピンドル3に脱着可能に装着された径方向に沿う支持アーム41の両端部との間に、操作ロッド機構40の分割ロッド42Aを架設する。   Then, as shown in FIG. 6, the opening on the punching machine A side of the punching work case 33 is closed with a lid 33C, and the first movable support cylinder C1 is passed through the shaft insertion hole 33a formed through the lid 33C. The split rod 42A of the operating rod mechanism 40 is installed between the bottom plate 10A of the first outer cylindrical body 10 and both ends of the support arm 41 along the radial direction that is detachably attached to the spindle 3 of the drilling machine A. .

このとき、操作ロッド42の他端側は、蓋体33Cに貫通形成された軸挿通孔33aに移動自在に挿通支持され、この操作ロッド42の他端側に設けられた押圧部材45が第1可動支持筒C1の第1外側筒体10の底板10Aの外側面に当接し、さらに、検知アーム60と第1外側筒体10の底板10Aに形成された第1当接部10bとの間には、固定具50が固定解除されている操作ロッド42の設定範囲での検知作動を許容する空隙Sが確保されている。   At this time, the other end side of the operation rod 42 is movably inserted into and supported by a shaft insertion hole 33a formed through the lid 33C, and a pressing member 45 provided on the other end side of the operation rod 42 is a first member. Abutting on the outer surface of the bottom plate 10A of the first outer cylinder 10 of the movable support cylinder C1, and further between the detection arm 60 and the first abutting portion 10b formed on the bottom plate 10A of the first outer cylinder 10. In this case, a clearance S that allows detection operation in the set range of the operation rod 42 in which the fixing tool 50 is released is secured.

[3]第3穿孔工程
図7に示すように、穿孔機Aの穿孔機本体5を駆動制御して、スピンドル3を操作ロッド42の分割ロッド42Aの長さ分に相当する送りピッチで被穿孔面Wa側に送り込み、その都度、分割ロッド42Aを継足し連結し、小径のカッター1C及び第1可動支持筒C1が分岐短管31内の穿孔作業位置に到達するまで繰り返す。
[3] Third drilling step As shown in FIG. 7, the drilling machine body 5 of the drilling machine A is driven and controlled, and the spindle 3 is drilled at a feed pitch corresponding to the length of the split rod 42A of the operating rod 42. Each time it is fed to the surface Wa side, the split rod 42A is added and connected, and the process is repeated until the small-diameter cutter 1C and the first movable support cylinder C1 reach the drilling work position in the branch short pipe 31.

第1可動支持筒C1が分岐短管31内に移入すると、図8に示すように、これの第1外側筒体10の外周面における上側部位の周方向複数箇所に形成されている凹状の被係合案内部23が、分岐短管31の内周面における上側部位の周方向複数箇所に形成されている突条の係合案内部22と係合し、第1可動支持筒C1の回動が阻止される。   When the first movable support cylinder C1 is moved into the branch short tube 31, as shown in FIG. 8, the concave cover formed at a plurality of positions in the circumferential direction of the upper part of the outer peripheral surface of the first outer cylinder 10 is provided. The engagement guide portion 23 engages with the engagement guide portions 22 of the protrusions formed at a plurality of locations in the circumferential direction of the upper side portion on the inner peripheral surface of the branch short tube 31, and the first movable support cylinder C1 rotates. Is blocked.

そのため、穿孔機Aの穿孔機本体5を駆動制御して、スピンドル3及び小径のカッター1Cを回転しても、第1可動支持筒C1が共回りすることがなく、第1可動支持筒C1は一定の向き姿勢で分岐短管31内の穿孔作業位置に保持される。   Therefore, even if the drilling machine main body 5 of the drilling machine A is driven and controlled to rotate the spindle 3 and the small diameter cutter 1C, the first movable support cylinder C1 does not rotate together, and the first movable support cylinder C1 The piercing work position in the branch short pipe 31 is held in a fixed orientation.

また、分岐短管31内に移入した第1可動支持筒C1の第1外側筒体10の外周面における下側部位は、分岐短管31の内周面における下側部位の周方向複数箇所に設けられた第3摺接ガイド部F3の樹脂製の第3摺接ガイド板38に摺動自在に受け止め支持され、この第1可動支持筒C1の筒軸芯と分岐短管31の管軸芯とが合致する。   In addition, the lower part of the outer peripheral surface of the first outer cylindrical body 10 of the first movable support cylinder C1 that has been transferred into the branch short pipe 31 has a plurality of locations in the circumferential direction of the lower part of the inner peripheral surface of the branch short pipe 31. It is slidably received and supported by the resin-made third sliding contact guide plate 38 of the provided third sliding contact guide portion F3, and the tube axis of the first movable support tube C1 and the tube shaft core of the branch short tube 31 are supported. Matches.

[4]第4穿孔工程
図9、図10に示すように、穿孔機Aのスピンドル3及び操作ロッド42の一端部から支持アーム41を撤去し、図10に示すように、操作ロッド42の一端部を固定具50で穿孔作業ケース33の蓋体33Cに固定する。
[4] Fourth Drilling Step As shown in FIGS. 9 and 10, the support arm 41 is removed from the spindle 3 and one end of the operation rod 42 of the drilling machine A, and as shown in FIG. 10, one end of the operation rod 42 is removed. The part is fixed to the lid 33 </ b> C of the drilling work case 33 with the fixing tool 50.

次に、穿孔機Aの穿孔機本体5を駆動制御して、分岐短管31内の穿孔作業位置で固定保持されている第1可動支持筒C1に対して、小径のカッター1Cを駆動回転させながらコンクリート壁Wの被穿孔面Waに向かって送り込み、被穿孔面Waに小径の貫通孔2Aを形成する。   Next, the drilling machine main body 5 of the drilling machine A is driven and controlled, and the small-diameter cutter 1C is driven and rotated with respect to the first movable support cylinder C1 fixedly held at the drilling work position in the branch short pipe 31. Then, the concrete wall W is fed toward the drilled surface Wa to form a small-diameter through hole 2A on the drilled surface Wa.

図9に示すように、穿孔終了時に、小径のカッター1C内に入り込み状態で分離された小径の回収切片4Aの重量が当該カッター1Cに加わるが、この小径のカッター1C及び小径の回収切片4Aの荷重は貫通孔2Aの内周面で支持されている。   As shown in FIG. 9, at the end of drilling, the weight of the small-diameter recovery section 4A that enters the small-diameter cutter 1C and is separated is added to the cutter 1C. The small-diameter cutter 1C and the small-diameter recovery section 4A The load is supported by the inner peripheral surface of the through hole 2A.

[5]第5穿孔工程
図11に示すように、穿孔機Aの穿孔機本体5を駆動制御して、コンクリート壁Wを貫通している小径のカッター1Cを戻し移動させると、この小径のカッター1Cの引き戻し移動に連れて第1可動支持筒C1が第1摺接ガイド部F1側に移行し、小径のカッター1C及び小径の回収切片4Aの荷重は第1可動支持筒C1の第1摺接ガイド部F1でも受け止められ、最終的には第1可動支持筒C1の第1摺接ガイド部F1に支持される。
[5] Fifth Drilling Step As shown in FIG. 11, when the drilling machine main body 5 of the drilling machine A is driven and controlled, the small-diameter cutter 1C penetrating the concrete wall W is moved back and moved. The 1st movable support cylinder C1 moves to the 1st sliding contact guide part F1 side with 1C pullback movement, and the load of the small diameter cutter 1C and the small diameter collection | recovery piece 4A is the 1st sliding contact of the 1st movable support cylinder C1. The guide part F1 is also received and is finally supported by the first sliding contact guide part F1 of the first movable support cylinder C1.

そして、小径のカッター1Cの底板1cが検知表示手段Gの検知アーム60に当接したとき、操作ロッド42の一端部を穿孔作業ケース33の蓋体33Cに固定している固定具50を撤去する。   When the bottom plate 1c of the small-diameter cutter 1C comes into contact with the detection arm 60 of the detection display means G, the fixture 50 that fixes one end of the operation rod 42 to the lid 33C of the drilling work case 33 is removed. .

この状態で穿孔機Aの穿孔機本体5を駆動制御して、小径のカッター1Cを初期位置側に戻し移動させると、図12、図13に示すように、この小径のカッター1Cの底板1cが検知表示手段Gの検知アーム60を押圧し、この検知アーム60を取付けてある操作ロッド42が、検知アーム60と第1外側筒体10の底板10Aの第1当接部10bとの間に形成されていた空隙Sの範囲で移動する。   When the drilling machine main body 5 of the drilling machine A is driven and controlled in this state and the small-diameter cutter 1C is moved back to the initial position side, the bottom plate 1c of the small-diameter cutter 1C is moved as shown in FIGS. An operation rod 42 that presses the detection arm 60 of the detection display means G and is attached to the detection arm 60 is formed between the detection arm 60 and the first contact portion 10b of the bottom plate 10A of the first outer cylinder 10. It moves within the gap S.

この操作ロッド42の検知作動により、回収切片4Aを保持する小径のカッター1Cが第1可動支持筒C1の所定位置に正確に戻り移動したことを目視で確認することができる。   By the detection operation of the operation rod 42, it can be visually confirmed that the small-diameter cutter 1C holding the recovery section 4A has accurately returned to the predetermined position of the first movable support cylinder C1 and moved.

[6]第6穿孔工程
図14に示すように、穿孔機Aの穿孔機本体5を駆動制御して、スピンドル3を操作ロッド42の分割ロッド42Aの長さ分に相当する戻しピッチで穿孔機A側に戻し移動させ、その都度、分割ロッド42Aを連結解除して撤去し、小径のカッター1C及び第1可動支持筒C1が穿孔作業ケース33内の初期位置に到達するまで繰り返す。
[6] Sixth drilling step As shown in FIG. 14, the drilling machine body 5 of the drilling machine A is driven and controlled, and the spindle 3 is punched at a return pitch corresponding to the length of the split rod 42A of the operating rod 42. Each time it is moved back to the A side, the split rod 42A is disconnected and removed, and the process is repeated until the small-diameter cutter 1C and the first movable support cylinder C1 reach the initial position in the drilling work case 33.

[7]第7穿孔工程
図15に示すように、仕切弁32の弁体32Dを遮断位置に閉弁操作し、この仕切弁32の下流側連結フランジ32Bから穿孔作業ケース33を撤去するとともに、穿孔機Aのスピンドル3から小径のカッター1Cと第1可動支持筒C1及び穿孔作業ケース33を撤去する。
[7] Seventh drilling step As shown in FIG. 15, the valve body 32D of the gate valve 32 is closed to the shut-off position, and the punching work case 33 is removed from the downstream connection flange 32B of the gate valve 32, The small-diameter cutter 1C, the first movable support cylinder C1 and the drilling work case 33 are removed from the spindle 3 of the drilling machine A.

[8]第8穿孔工程
図16に示すように、穿孔機Aのスピンドル3の先端部に中径(穿孔径が1690mm)のカッター1Bを取付けるとともに、スピンドル3には、中径のカッター1Bを収納可能な第2可動支持筒C2を取付け、この中径のカッター1B及び第2可動支持筒C2を穿孔作業ケース33内の初期位置に配置する。
[8] Eighth Drilling Step As shown in FIG. 16, a cutter 1B having a medium diameter (a drilling diameter of 1690 mm) is attached to the tip of the spindle 3 of the punching machine A, and a cutter 1B having a medium diameter is attached to the spindle 3. A retractable second movable support cylinder C2 is attached, and the medium-diameter cutter 1B and the second movable support cylinder C2 are arranged at an initial position in the drilling work case 33.

中径のカッター1Bの外周面における下側部位は、図17に示すように、第2可動支持筒C2の第2摺接ガイド板20に摺動可能な状態で載置支持され、この中径のカッター1Bの回転軸芯と第2可動支持筒C2の筒軸芯とが合致した状態にある。   As shown in FIG. 17, the lower part of the outer peripheral surface of the medium diameter cutter 1B is placed and supported in a slidable state on the second sliding contact guide plate 20 of the second movable support cylinder C2. The rotation axis of the cutter 1B and the cylinder axis of the second movable support cylinder C2 are in a matched state.

また、第2可動支持筒C2の第2外側筒体16の外周面における下側部位は、穿孔作業ケース33の第4摺接ガイド部F4の摺接ガイドレール39に摺動可能な状態で載置支持され、この第2可動支持筒C2の筒軸芯と穿孔作業ケース33の筒軸芯とが合致した状態にある。   Further, the lower part of the second movable support cylinder C2 on the outer peripheral surface of the second outer cylinder 16 is slidable on the sliding contact guide rail 39 of the fourth sliding contact guide part F4 of the drilling work case 33. The cylinder axis of the second movable support cylinder C2 and the cylinder axis of the drilling work case 33 are in agreement with each other.

そして、図16に示すように、穿孔作業ケース33の穿孔機A側の開口を蓋体33Cで閉塞し、この蓋体33Cに貫通形成されている軸挿通孔33a(図6参照)を通して、第2可動支持筒C2の第2外側筒体16の底板16Aと穿孔機Aのスピンドル3に脱着可能に装着された径方向に沿う支持アーム41の両端部との間に、操作ロッド機構40の分割ロッド42Aを架設する。   Then, as shown in FIG. 16, the opening on the punching machine A side of the drilling work case 33 is closed with a lid 33C, and through a shaft insertion hole 33a (see FIG. 6) formed through the lid 33C, 2 Dividing the operating rod mechanism 40 between the bottom plate 16A of the second outer cylinder 16 of the movable support cylinder C2 and both ends of the support arm 41 along the radial direction that is detachably attached to the spindle 3 of the drilling machine A The rod 42A is installed.

このとき、操作ロッド42の他端側は、蓋体33Cに貫通形成された軸挿通孔33aに移動自在に挿通支持され、この操作ロッド42の他端側に設けられた押圧部材45が第2可動支持筒C2の第2外側筒体16の底板16Aの外側面に当接し、さらに、検知アーム60と第2外側筒体16の底板16Aに形成された第2当接部16bとの間には、固定具50が固定解除されている操作ロッド42の設定範囲での検知作動を許容する空隙Sが確保されている。   At this time, the other end side of the operation rod 42 is movably inserted and supported in a shaft insertion hole 33a formed through the lid 33C, and the pressing member 45 provided on the other end side of the operation rod 42 is a second member. Abutting on the outer surface of the bottom plate 16A of the second outer cylindrical body 16 of the movable support cylinder C2, and further between the detection arm 60 and the second abutting portion 16b formed on the bottom plate 16A of the second outer cylindrical body 16. In this case, a clearance S that allows detection operation in the set range of the operation rod 42 in which the fixing tool 50 is released is secured.

[9]第9穿孔工程
図19に示すように、穿孔機Aの穿孔機本体5を駆動制御して、スピンドル3を操作ロッド42の分割ロッド42Aの長さ分に相当する送りピッチで被穿孔面Wa側に送り込み、その都度、分割ロッド42Aを継足し連結し、中径のカッター1B及び第2可動支持筒C2が分岐短管31内の穿孔作業位置に到達するまで繰り返す。
[9] Ninth Drilling Step As shown in FIG. 19, the drilling machine main body 5 of the drilling machine A is driven and controlled, and the spindle 3 is drilled at a feed pitch corresponding to the length of the split rod 42A of the operating rod 42. Each time it is fed to the surface Wa side, the dividing rod 42A is added and connected, and the process is repeated until the medium-diameter cutter 1B and the second movable support cylinder C2 reach the drilling work position in the branch short pipe 31.

第2可動支持筒C2が分岐短管31内に移入すると、図20に示すように、これの第2外側筒体16の外周面における上側部位の周方向複数箇所に形成されている凹状の被係合案内部24が、分岐短管31の内周面における上側部位の周方向複数箇所に形成されている突条の係合案内部22と係合し、第2可動支持筒C2の回動が阻止される。   When the second movable support cylinder C2 is moved into the branch short tube 31, as shown in FIG. 20, the concave cover formed at a plurality of positions in the circumferential direction of the upper part of the outer peripheral surface of the second outer cylinder 16 is provided. The engagement guide portion 24 is engaged with the engagement guide portions 22 of the protrusions formed at a plurality of locations in the circumferential direction of the upper side portion on the inner peripheral surface of the branch short tube 31, and the second movable support cylinder C2 is rotated. Is blocked.

そのため、穿孔機Aの穿孔機本体5を駆動制御して、スピンドル3及び中径のカッター1Bを回転しても、第2可動支持筒C2が共回りすることがなく、第2可動支持筒C2は一定の向き姿勢で分岐短管31内の穿孔作業位置に保持される。   Therefore, even if the drilling machine main body 5 of the drilling machine A is driven and controlled to rotate the spindle 3 and the medium diameter cutter 1B, the second movable support cylinder C2 does not rotate together, and the second movable support cylinder C2 does not rotate. Is held at the drilling work position in the short branch pipe 31 in a fixed orientation.

また、分岐短管31内に移入した第2可動支持筒C2の第2外側筒体16の外周面における下側部位は、分岐短管31の内周面における下側部位の周方向複数箇所に設けられた第3摺接ガイド部F3の樹脂製の第3摺接ガイド板38に摺動自在に受け止め支持され、この第2可動支持筒C2の筒軸芯と分岐短管31の管軸芯とが合致する。   Further, the lower part of the outer peripheral surface of the second outer cylindrical body 16 of the second movable support cylinder C <b> 2 transferred into the branch short pipe 31 is located at a plurality of locations in the circumferential direction of the lower part of the inner peripheral surface of the branch short pipe 31. It is slidably received and supported by a resin-made third sliding contact guide plate 38 of the provided third sliding contact guide portion F3, and the tube axis of the second movable support tube C2 and the tube shaft core of the branch short tube 31 are supported. Matches.

[10]第10穿孔工程
図21に示すように、穿孔機Aのスピンドル3及び操作ロッド42の一端部から支持アーム41を撤去し、操作ロッド42の一端部を固定具50で穿孔作業ケース33の蓋体33Cに固定する。
[10] Tenth Drilling Step As shown in FIG. 21, the support arm 41 is removed from one end of the spindle 3 and the operation rod 42 of the drilling machine A, and one end of the operation rod 42 is drilled with the fixture 50. To the lid 33C.

次に、穿孔機Aの穿孔機本体5を駆動制御して、分岐短管31内の穿孔作業位置で固定保持されている第2可動支持筒C2に対して、中径のカッター1Bを駆動回転させながらコンクリート壁Wの被穿孔面Waに向かって送り込み、被穿孔面Waに中径の貫通孔2Bを形成する。   Next, the drilling machine main body 5 of the drilling machine A is driven and controlled, and the medium-diameter cutter 1B is driven and rotated with respect to the second movable support cylinder C2 fixedly held at the drilling work position in the branch short pipe 31. Then, the concrete wall W is fed toward the perforated surface Wa to form a medium-diameter through hole 2B on the perforated surface Wa.

図21に示すように、穿孔終了時に、中径のカッター1B内に入り込み状態で分離された中径の円環状の回収切片4Bの重量が当該カッター1Bに加わるが、この中径のカッター1B及び中径の回収切片4Aの荷重は貫通孔2Bの内周面で支持されている。   As shown in FIG. 21, at the end of drilling, the weight of the medium-diameter annular collection piece 4B that has entered and separated into the medium-diameter cutter 1B is added to the cutter 1B. The load of the medium-sized collection piece 4A is supported by the inner peripheral surface of the through hole 2B.

[11]第11穿孔工程
図22に示すように、穿孔機Aの穿孔機本体5を駆動制御して、コンクリート壁Wを貫通している中径のカッター1Bを戻し移動させると、この中径のカッター1Bの引き戻し移動に連れて第2可動支持筒C2が第2摺接ガイド部F2側に移行し、中径のカッター1B及び中径の回収切片4Bの荷重は第2可動支持筒C2の第2摺接ガイド部F2でも受け止められ、最終的には第2可動支持筒C2の第2摺接ガイド部F2に支持される。
[11] Eleventh drilling step As shown in FIG. 22, when the drilling machine main body 5 of the drilling machine A is driven and controlled, the medium-diameter cutter 1B penetrating the concrete wall W is moved back and moved. As the cutter 1B is pulled back, the second movable support cylinder C2 moves to the second sliding contact guide portion F2 side, and the load of the medium diameter cutter 1B and the medium diameter recovery section 4B is applied to the second movable support cylinder C2. It is also received by the second sliding contact guide portion F2, and is finally supported by the second sliding contact guide portion F2 of the second movable support cylinder C2.

そして、中径のカッター1Bの底板1bが検知表示手段Gの検知アーム60に当接する前の段階において、操作ロッド42の一端部を穿孔作業ケース33の蓋体33Cに固定している固定具50を撤去する。   Then, in a stage before the bottom plate 1b of the medium-diameter cutter 1B comes into contact with the detection arm 60 of the detection display means G, the fixture 50 that fixes one end of the operation rod 42 to the lid 33C of the drilling work case 33. To remove.

この状態で穿孔機Aの穿孔機本体5を駆動制御して、中径のカッター1Bを初期位置側に戻し移動させると、この中径のカッター1Bの底板1bが検知表示手段Gの検知アーム60を押圧し、この検知アーム60を取付けてある操作ロッド42が、検知アーム60と第2外側筒体16の底板16Aの第2当接部16bとの間に形成されていた空隙Sの範囲で移動する。   In this state, when the drilling machine main body 5 of the drilling machine A is driven and controlled to move the medium diameter cutter 1B back to the initial position, the bottom plate 1b of the medium diameter cutter 1B is detected by the detection arm 60 of the detection display means G. The operating rod 42 to which the detection arm 60 is attached is within the range of the gap S formed between the detection arm 60 and the second contact portion 16b of the bottom plate 16A of the second outer cylinder 16. Moving.

この操作ロッド42の検知作動により、中径の回収切片4Bを保持する中径のカッター1Bが第2可動支持筒C2の所定位置に正確に戻り移動したことを目視で確認することができる。   By the detection operation of the operation rod 42, it can be visually confirmed that the medium-diameter cutter 1B holding the medium-diameter collection section 4B has accurately returned to the predetermined position of the second movable support cylinder C2.

[12]第12穿孔工程
図23に示すように、穿孔機Aの穿孔機本体5を駆動制御して、スピンドル3を操作ロッド42の分割ロッド42Aの長さ分に相当する戻しピッチで穿孔機A側に戻し移動させ、その都度、分割ロッド42Aを連結解除して撤去し、中径のカッター1B及び第2可動支持筒C2が穿孔作業ケース33内の初期位置に到達するまで繰り返す。
[12] Twelfth drilling step As shown in FIG. 23, the drilling machine main body 5 of the drilling machine A is driven and controlled, and the spindle 3 is punched at a return pitch corresponding to the length of the split rod 42A of the operating rod 42. Each time it is moved back to the A side, the split rod 42A is disconnected and removed, and the process is repeated until the medium-diameter cutter 1B and the second movable support cylinder C2 reach the initial position in the drilling work case 33.

[13]第13穿孔工程
仕切弁32の弁体32Dを遮断位置に閉弁操作し、この仕切弁32の下流側連結フランジ32Bから穿孔作業ケース33を撤去するとともに、穿孔機Aのスピンドル3から中径のカッター1Bと第2可動支持筒C2及び穿孔作業ケース33を撤去する(図15参照)。
[13] Thirteenth drilling step The valve body 32D of the gate valve 32 is closed to the shut-off position, the drilling work case 33 is removed from the downstream connection flange 32B of the gate valve 32, and the spindle 3 of the drilling machine A is removed. The medium-diameter cutter 1B, the second movable support cylinder C2, and the drilling work case 33 are removed (see FIG. 15).

[14]第14穿孔工程
図24に示すように、穿孔機Aのスピンドル3の先端部に設定穿孔径(1900mm)のカッター1Aを取付け、この設定穿孔径のカッター1Aを穿孔作業ケース33内の初期位置に配置する。
[14] Fourteenth Drilling Step As shown in FIG. 24, a cutter 1A having a set drilling diameter (1900 mm) is attached to the tip of the spindle 3 of the drilling machine A, and the cutter 1A having this set drilling diameter is installed in the drilling work case 33. Place in the initial position.

設定穿孔径のカッター1Aの外周面における下側部位は、図25に示すように、穿孔作業ケース33の第4摺接ガイド部F4の摺接ガイドレール39に摺動可能な状態で載置支持され、この設定穿孔径のカッター1Aの回転軸芯と穿孔作業ケース33の筒軸芯とが合致した状態にある。   As shown in FIG. 25, the lower part of the outer peripheral surface of the cutter 1A having the set perforation diameter is placed and supported while being slidable on the sliding contact guide rail 39 of the fourth sliding contact guide portion F4 of the punching work case 33. Then, the rotational axis of the cutter 1A having the set drilling diameter and the cylindrical axis of the drilling work case 33 are in a state of matching.

[15]第15穿孔工程
穿孔機Aの穿孔機本体5を駆動制御して、穿孔作業ケース33内の初期位置に位置する設定穿孔径のカッター1Aを分岐短管31内の穿孔作業位置に送り込む。
[15] Fifteenth drilling step The drilling machine body 5 of the drilling machine A is driven and controlled, and the cutter 1A having a set drilling diameter located at the initial position in the drilling work case 33 is sent to the drilling work position in the branch short pipe 31. .

分岐短管31内に移入した設定穿孔径のカッター1Aの外周面における下側部位は、図27に示すように、分岐短管31の内周面における下側部位の周方向複数箇所に設けられた第3摺接ガイド部F3の樹脂製の第3摺接ガイド板38に摺動並びに回転自在に受け止め支持され、この設定穿孔径のカッター1Aの回転軸芯と分岐短管31の管軸芯とが合致する。   As shown in FIG. 27, the lower part of the outer peripheral surface of the cutter 1A having a set perforation diameter transferred into the branch short pipe 31 is provided at a plurality of locations in the circumferential direction of the lower part of the inner peripheral surface of the branch short pipe 31. Further, the third sliding contact guide plate 38 of the third sliding contact guide portion F3 is slidably and rotatably supported and supported, and the rotation axis of the cutter 1A having the set bore diameter and the tube axis of the branch short tube 31 are supported. Matches.

次に、図26に示すように、穿孔機Aの穿孔機本体5を駆動制御して、分岐短管31内の穿孔作業位置に位置する設定穿孔径のカッター1Aを駆動回転させながらコンクリート壁Wの被穿孔面Waに向かって送り込み、被穿孔面Waに設定内径(1900mm)の貫通孔2を形成する。   Next, as shown in FIG. 26, the drilling machine main body 5 of the drilling machine A is driven and controlled, and the concrete wall W is driven while rotating the cutter 1A having a set drilling diameter located at the drilling work position in the branch short pipe 31. The through-hole 2 having a set inner diameter (1900 mm) is formed on the perforated surface Wa.

[16]第16穿孔工程
図28に示すように、穿孔機Aの穿孔機本体5を駆動制御して、穿孔作業が終了した設定穿孔径のカッター1Aを穿孔作業ケース33内の初期位置に戻し移動させる。
[16] Sixteenth Drilling Step As shown in FIG. 28, the punching machine body 5 of the drilling machine A is driven and controlled, and the cutter 1A having the set drilling diameter after the drilling work is returned to the initial position in the drilling work case 33. Move.

設定穿孔径のカッター1Aによる穿孔終了時に、設定穿孔径のカッター1A内に入り込み状態で分離された大径の円環状の回収切片4Cの重量が当該カッター1Aに加わるが、この時の切片荷重は、小径のカッター1Cによる穿孔時の切片荷重、及び、中径のカッター1Bによる穿孔時の切片荷重よりも軽い。
しかも、設定穿孔径のカッター1Aは、分岐短管31の内周面に設けられた第3摺接ガイド部F3及び穿孔作業ケース33の内周面に設けられた第4摺接ガイド部F4によって初期位置にまで摺動案内されるため、穿孔機Aのスピンドル3に作用する荷重を大幅に軽減することができる。
[17]第17穿孔工程
仕切弁32の弁体32Dを遮断位置に閉弁操作し、この仕切弁32の下流側連結フランジ32Bから穿孔作業ケース33を撤去するとともに、穿孔機Aのスピンドル3から設定穿孔径のカッター1A及び穿孔作業ケース33を撤去する(図15参照)。
尚、上述の実施形態では、当て板44と固定板51とを別部材から構成したが、この当て板44と固定板51とを一つの部材で兼用構成してもよい。
At the end of drilling by the cutter 1A having the set drilling diameter, the weight of the large-diameter annular collection section 4C separated into the cutter 1A having the set drilling diameter is added to the cutter 1A. It is lighter than the section load when drilling with the small-diameter cutter 1C and the section load when drilling with the medium-diameter cutter 1B.
Moreover, the cutter 1A having the set perforation diameter is provided by the third sliding contact guide portion F3 provided on the inner peripheral surface of the branch short tube 31 and the fourth sliding contact guide portion F4 provided on the inner peripheral surface of the punching work case 33. Since it is slid and guided to the initial position, the load acting on the spindle 3 of the drilling machine A can be greatly reduced.
[17] Seventeenth drilling step The valve body 32D of the gate valve 32 is closed to the shut-off position, the drilling work case 33 is removed from the downstream connection flange 32B of the gate valve 32, and the spindle 3 of the drilling machine A is removed. The cutter 1A having the set drilling diameter and the drilling work case 33 are removed (see FIG. 15).
In the above-described embodiment, the contact plate 44 and the fixed plate 51 are configured as separate members. However, the contact plate 44 and the fixed plate 51 may be configured as a single member.

〔第2実施形態〕
上述の第1実施形態では、小径のカッター1Cの回転軸芯と中径のカッター1Bの回転軸芯及び設定穿孔径のカッター1Aの回転軸芯とを合致させて、被穿孔面Waに小径の貫通孔2Aと中径の貫通孔2B及び設定内径の貫通孔2とを同心円状に形成したが、図29に示すように、小径のカッター1Cの回転軸芯と中径のカッター1Bの回転軸芯及び設定穿孔径のカッター1Aの回転軸芯とを、それらの外周面の特定部位が同一となる偏心状態に配置して、被穿孔面Waに小径の貫通孔2Aと中径の貫通孔2B及び設定内径の貫通孔2とを多重内接円状に形成してもよい。
[Second Embodiment]
In the first embodiment described above, the rotational axis of the small-diameter cutter 1C is matched with the rotational axis of the medium-diameter cutter 1B and the rotational axis of the cutter 1A having the set perforation diameter, so that the small-diameter is formed on the perforated surface Wa. Although the through-hole 2A, the medium-diameter through-hole 2B, and the set-diameter through-hole 2 are formed concentrically, as shown in FIG. 29, the rotation axis of the small-diameter cutter 1C and the rotation axis of the medium-diameter cutter 1B The core and the rotating shaft core of the cutter 1A having a set perforation diameter are arranged in an eccentric state in which specific portions of the outer peripheral surface thereof are the same, and a small-diameter through hole 2A and a medium-diameter through hole 2B are formed in the perforated surface Wa. The through hole 2 having a set inner diameter may be formed in a multiple inscribed circle shape.

〔その他の実施形態〕
(1)上述の各実施形態では、穿孔機Aのスピンドル3の先端部の装着される円筒状のカッター1を、貫通孔2の設定内径に該当する設定穿孔径のカッター1Aと、これの設定穿孔径よりも順次小径となる2個のカッター1B,1Cとから構成したが、このカッター1を、貫通孔2の設定内径に該当する設定穿孔径のカッター1Aと、これよりも小径の1個のカッター1Bとから構成してもよい。
[Other Embodiments]
(1) In each of the above-described embodiments, the cylindrical cutter 1 attached to the tip of the spindle 3 of the drilling machine A is set to the cutter 1A having a set drilling diameter corresponding to the set inner diameter of the through hole 2 and the setting thereof. The cutter 1 is composed of two cutters 1B and 1C that are successively smaller in diameter than the drilling diameter. The cutter 1 is a cutter 1A having a set drilling diameter corresponding to the set inner diameter of the through-hole 2 and one smaller in diameter. You may comprise from the cutter 1B.

(2)上述の第1実施形態では、カッター1の回転軸芯に対する直交方向の垂直面に対して傾斜しているコンクリート壁Wを例に挙げて説明したが、このコンクリート壁Wとしては、カッター1の回転軸芯に対する直交方向の垂直面と平行な被穿孔面Waを備えたものであってもよい。 (2) In the first embodiment described above, the concrete wall W inclined with respect to the vertical plane perpendicular to the rotation axis of the cutter 1 has been described as an example. It may be provided with a perforated surface Wa parallel to a perpendicular surface perpendicular to the rotation axis of one.

(3)上述の第1実施形態では、移動案内手段Dを、被穿孔面Waに対してカッター1の回転軸芯と同芯状態で固定配設された筒状ガイド体から構成したが、穿孔時に水が流出しない条件下であれば、移動案内手段Dを、可動支持体Cをカッター1の出退方向に沿って移動案内するレール部材から構成してもよい。 (3) In the above-described first embodiment, the movement guide means D is constituted by the cylindrical guide body fixedly arranged in a concentric state with the rotation axis of the cutter 1 with respect to the drilled surface Wa. As long as water does not flow out sometimes, the movement guide means D may be composed of a rail member that moves and guides the movable support C along the direction in which the cutter 1 is withdrawn.

(4)上述の第1実施形態では、穿孔機Aのスピンドル3の送り込み力で操作ロッド機構40を作動させて、初期位置にある可動支持体Cを穿孔作業位置に押込み操作するように構成したが、操作ロッド機構40を穿孔機A以外のアクチュエータ又は人為操作力で作動させて、初期位置にある可動支持体Cを穿孔作業位置に押込み操作するように構成してもよい。
また、上述の第1実施形態では、穿孔機Aのスピンドル3の戻し力で穿孔作業位置にある可動支持体Cを初期位置に戻し移動するように構成したが、穿孔機A以外のアクチュエータ又は人為操作力によって穿孔作業位置にある可動支持体Cを初期位置に戻し移動するように構成してもよい。
さらに、操作ロッド機構40を押し引き操作して、可動支持体Cを初期位置と穿孔作業位置との間で往復移動させるように構成してもよい。
(4) In the first embodiment described above, the operation rod mechanism 40 is operated by the feed force of the spindle 3 of the drilling machine A, and the movable support C at the initial position is pushed into the drilling work position. However, the operation rod mechanism 40 may be operated by an actuator other than the punching machine A or by an artificial operating force so that the movable support C at the initial position is pushed into the drilling work position.
In the above-described first embodiment, the movable support C at the drilling work position is moved back to the initial position by the return force of the spindle 3 of the drilling machine A. You may comprise so that the movable support body C in a drilling operation position may be returned to an initial position and moved by operation force.
Further, the operation rod mechanism 40 may be pushed and pulled to reciprocate the movable support C between the initial position and the drilling work position.

(5)可動支持体Cに構成される摺接ガイド部Fに、カッター1の駆動回転ならびに出退移動を補助する複数のボールやローラー等を設けてもよい。 (5) A plurality of balls, rollers, or the like that assist the drive rotation and the withdrawal movement of the cutter 1 may be provided in the sliding contact guide portion F configured on the movable support C.

(6)穿孔が終了したカッター1が可動支持体Cの所定位置に戻り移動したことを検知表示する検知表示手段Gを構成するにあたって、上述の第1実施形態では、操作ロッド機構40の操作ロッド42を利用して検出表示するように構成したが、穿孔が終了したカッター1が可動支持体Cの所定位置に戻り移動したことを検知するセンサと、このセンサの電気検出信号に基づいて表示する表示部とから構成してもよい。 (6) In constructing the detection display means G for detecting and displaying that the cutter 1 that has been punched has returned to the predetermined position of the movable support C and moved, in the above-described first embodiment, the operation rod of the operation rod mechanism 40 42 is used to detect and display, but a sensor that detects that the cutter 1 that has finished drilling has returned to a predetermined position of the movable support C and moved is displayed based on the electrical detection signal of this sensor. You may comprise from a display part.

(7)穿孔機の穿孔補助装置が対象とする被穿孔面は、上述の第1実施形態で説明したコンクリート製の構造体に限定されず、流体管や鉄骨等の他の被穿孔体の被穿孔面であってもよい。 (7) The drilled surface targeted by the drilling assisting device of the drilling machine is not limited to the concrete structure described in the first embodiment, and is covered by other drilled objects such as fluid pipes and steel frames. It may be a perforated surface.

以上説明したように、穿孔機のスピンドルに作用する穿孔終了時の荷重負担を軽減して、スピンドルの荷重による傾動や撓み変形によってカッターが引き戻せなくなる不都合を解消すると同時に、穿孔機の小型化とそれに伴う工事スペースの縮小化とによって工事コストの低廉化を達成することのできる穿孔補助装置及びコンクリート製構造体の穿孔方法を提供することができる。   As described above, the load at the end of drilling acting on the spindle of the drilling machine is reduced, and the inconvenience that the cutter cannot be pulled back due to tilting or bending deformation due to the spindle load is reduced, and at the same time, the drilling machine is downsized. Accordingly, it is possible to provide a drilling auxiliary device and a method for drilling a concrete structure that can achieve a reduction in the construction cost by reducing the construction space associated therewith.

A 穿孔機
C 可動支持体
C1 第1可動支持筒
C2 第2可動支持筒
D 移動案内手段
D1 筒状ガイド体
E 移動操作手段
F 摺接ガイド部
G 検知表示手段
W 構造体(コンクリート壁)
Wa 被穿孔面
1 カッター
1A 設定穿孔径のカッター
1B 中径のカッター
1C 小径のカッター
2 設定内径の貫通孔
2A 小径の貫通孔
2B 中径の貫通孔
22 係合案内部
23 被係合案内部
24 被係合案内部
31 分岐短管
32 仕切弁
32C 弁ケース
32D 弁体
33 穿孔作業ケース(作業ケース)
38 摺接ガイド板
39 摺接ガイドレール
40 操作ロッド機構
42 操作ロッド
42A 分割ロッド
50 固定具
6 コンクリート防護壁
A punching machine C movable support C1 first movable support cylinder C2 second movable support cylinder D movement guide means D1 cylindrical guide body E movement operation means F sliding contact guide part G detection display means W structure (concrete wall)
Wa Surface to be drilled 1 Cutter 1A Cutter with set drilling diameter 1B Cutter with medium diameter 1C Cutter with small diameter 2 Through-hole with set inner diameter 2A Through-hole with small diameter 2B Through-hole with medium diameter 22 Engagement guide part 23 Engagement guide part 24 Engaged guide part 31 Branch short pipe 32 Gate valve
32C valve case
32D Valve body 33 Drilling work case (work case)
38 Sliding contact guide plate
39 Sliding contact guide rail 40 Operation rod mechanism 42 Operation rod 42A Split rod 50 Fixing tool
6 Concrete protective wall

Claims (4)

コンクリート壁の被穿孔面を穿孔する円筒状のカッターを有する穿孔機と、A drilling machine having a cylindrical cutter for drilling a drilled surface of a concrete wall;
前記被穿孔面に固定された分岐短管と、弁体を収容し、前記分岐短管に固定された弁ケースと、前記弁ケースに固定された作業ケースとを有し、前記穿孔機を水密状態で支持する筒状ガイド体と、を備え、A short branch pipe fixed to the perforated surface; a valve case that contains a valve body and fixed to the short branch pipe; and a work case fixed to the valve case; A cylindrical guide body supported in a state,
前記カッターは、前記コンクリート壁の切片を内部に保持して前記切片の荷重を受け止め可能に構成されており、The cutter is configured to hold the section of the concrete wall inside and receive the load of the section,
前記分岐短管の取付けフランジは、前記被穿孔面にアンカーボルトにより水密に固定されており、The mounting flange of the branch short pipe is watertightly fixed to the drilled surface by an anchor bolt,
前記分岐短管の外周面は、コンクリート防護壁により前記被穿孔面に固定されている穿孔設備。A perforation facility in which an outer peripheral surface of the branched short pipe is fixed to the perforated surface by a concrete protective wall.
前記分岐短管は、前記カッターの外周面に摺接して前記カッターを回転軸芯方向に案内する摺接ガイド板が内周面に固定されている請求項1に記載の穿孔設備。The perforating equipment according to claim 1, wherein the branch short pipe is fixed to an inner peripheral surface of a sliding contact guide plate that is in sliding contact with the outer peripheral surface of the cutter and guides the cutter in a rotation axis direction. 前記作業ケースは、前記カッターの外周面に摺接して前記カッターを回転軸芯方向に案内する丸鋼製の摺接ガイドレールが内周面に固定されており、The working case has a sliding contact guide rail made of round steel that is in sliding contact with the outer peripheral surface of the cutter and guides the cutter in the direction of the rotation axis, and is fixed to the inner peripheral surface.
前記摺接ガイドレールは、前記弁ケースの内周面まで延在している請求項1又は2に記載の穿孔設備。The drilling facility according to claim 1 or 2, wherein the sliding contact guide rail extends to an inner peripheral surface of the valve case.
前記カッターの出退方向に沿って往復移動自在で、且つ、前記カッター及び前記カッターの内部に保持されている前記切片の荷重を受け止め可能な可動支持体を備えている請求項1〜3のいずれか一項に記載の穿孔設備。The movable support body according to any one of claims 1 to 3, further comprising a movable support that is reciprocally movable along a retracting direction of the cutter and that can receive a load of the cutter and the section held inside the cutter. The drilling facility according to claim 1.
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