JP7149523B2

JP7149523B2 - Branch pipe removal method and removal tool.

Info

Publication number: JP7149523B2
Application number: JP2018244006A
Authority: JP
Inventors: 恵介斎藤; 直也高橋
Original assignee: Meiwa Kogyo Co Ltd
Current assignee: Meiwa Kogyo Co Ltd
Priority date: 2018-12-27
Filing date: 2018-12-27
Publication date: 2022-10-07
Anticipated expiration: 2038-12-27
Also published as: JP2020106069A

Description

本発明は、主として不断水工法を採用する際に形成される分岐管を撤去する方法及び前記方法に使用する撤去用具に関するものである。 TECHNICAL FIELD The present invention relates to a method for removing a branch pipe that is mainly formed when an uninterrupted water supply construction method is employed, and a removal tool used in the method.

既設水道管の交換工事においては、水道利用者に不便を与えないように上流側で止水することなく不断水の状態を維持したまま施工するために分岐管を設けてバイパス路を形成し、また一時的な水道利用のための分岐管が構築される。このような分岐管は、本管と一体に形成された管分岐口に仕切弁機構を連結し、仕切弁機構に分岐管を連結して構成される。 In the replacement work of existing water pipes, a branch pipe is installed to form a bypass in order to maintain the state of uninterrupted water without stopping the water upstream so as not to cause inconvenience to water users. A branch pipe will also be constructed for temporary water supply. Such a branch pipe is constructed by connecting a sluice valve mechanism to a pipe branch port formed integrally with the main pipe, and connecting the branch pipe to the sluice valve mechanism.

分岐管が不必要となった場合には当該分岐管を撤去するが、仕切弁機構を残存させると水道管から当該部分が突出することになり、将来における再度の掘削作業時の邪魔になるので、仕切弁機構も除去する必要がある。 When the branch pipe becomes unnecessary, the branch pipe is removed, but if the sluice valve mechanism is left, the part will protrude from the water pipe, which will interfere with excavation work in the future. , the gate valve mechanism must also be removed.

そこで管分岐口の密閉手段として、仕切弁を閉じた状態で密栓体を仕切弁の流路外方位置に水密状態で配置できる合フランジを採用し、合フランジに栓体を先端に装着した挿入体（特許文献１では挿入冶具、特許文献２では操作軸）を挿着して仕切弁機構に連結し、仕切弁体を開口して栓体を管分岐部内に差し入れ、管分岐部に装着して密閉し、その後密栓体を分離した挿入体及び合フランジ並びに仕切弁機構を取り外すようにしている。 Therefore, as a sealing means for the pipe branch port, a mating flange that can be placed in a watertight state outside the flow path of the gate valve with the gate valve closed is adopted. The body (insertion jig in Patent Document 1, operation shaft in Patent Document 2) is inserted and connected to the sluice valve mechanism, the sluice valve body is opened, the plug body is inserted into the pipe branching portion, and attached to the pipe branching portion. After that, the sealing member is separated from the insert body, the mating flange, and the gate valve mechanism are removed.

また前記特許文献１の密栓体と管分岐口の連結は、管分岐口内周面に一部を切欠した通過箇所（切欠部）を設けた係合突起を設け、密栓体には基方（管路外方）にシール部を設け、先端箇所に前記切欠部を通過できる張出部を設けてなり、密栓体を管分岐口内に挿入して張出部を係止突起の下方（管路内方）に位置させて装着するようにしたものである。 In addition, in the connection between the sealing member and the pipe branching port of Patent Document 1, an engaging projection having a passage portion (notch portion) partially cut out on the inner peripheral surface of the pipe branching port is provided, and the sealing member is provided with a base (pipe A sealing portion is provided on the outside of the channel), and an overhanging portion that can pass through the notch is provided at the tip portion. direction).

また特許文献２の密栓体と管分岐口の連結は、管分岐口内周面（周壁面）に通過部を設けたバヨネット溝を備えた係合壁に形成し、密栓体には先方（管路内方）にシール部を設け、基方に通過部を通過できる突起を設けてなり、密栓体を管分岐口内に挿入して通過部をバヨネット溝内に位置させて装着するようにしたものである。 In addition, the connection between the sealing member and the pipe branching port of Patent Document 2 is formed in an engagement wall provided with a bayonet groove having a passing portion provided on the inner peripheral surface (peripheral wall surface) of the pipe branching port, and the sealing member is connected to the tip (pipe line A sealing part is provided on the inner side), and a protrusion that can pass through the passage part is provided on the base side, and the sealing body is inserted into the pipe branch opening and the passage part is positioned in the bayonet groove. be.

特開２００９－１６８１６３号公報。Japanese Patent Application Laid-Open No. 2009-168163. 特開２０１０－１１７０２９号公報。Japanese Patent Application Laid-Open No. 2010-117029.

不断水状態で管分岐口内にシール機能を備えた密栓体を装着するには、密栓体が受ける水道本管からの水圧を考慮する必要がある。 In order to attach a sealing member having a sealing function to a pipe branch opening in an uninterrupted water supply state, it is necessary to consider the water pressure from the water main pipe that the sealing member receives.

その対策として特許文献１で開示されている手段は、密栓体を回動するための芯軸と、密栓体を管分岐口内に圧挿入するために水道本管との間に介装したジャッキを連結する外軸の二重軸構成を採用し、外軸を介してジャッキ力を作用させてシール部を備えた密栓体の圧挿入を実現している。 As a countermeasure disclosed in Patent Document 1, a jack is interposed between the core shaft for rotating the sealing member and the main pipe for press-inserting the sealing member into the pipe branching port. A double-shaft configuration of the connecting outer shafts is adopted, and a jacking force is applied via the outer shafts to achieve press-insertion of the hermetic plug provided with the sealing portion.

また特許文献２に開示されている手段は、ジャッキを採用せずに、密栓体のシール部の構成を、管分岐口の内径を小さい状態で組み込み、密栓体を水圧の抵抗を受けずに管分岐口内で挿入して装着後、密栓体の先端部材でシールを圧して外周方向膨出させてシール機能を発揮する構成を採用したもので、そのために挿入体に二重軸を採用し、外軸は密栓体装着のための回動操作軸とし、内軸を先端部材の螺合回転のための回転操作軸としているものである。 In addition, the means disclosed in Patent Document 2 does not employ a jack, and incorporates the configuration of the sealing portion of the sealing member into a small inner diameter of the pipe branch opening, thereby allowing the sealing member to be connected to the pipe without being subjected to water pressure resistance. After inserting it into the branch and attaching it, the seal is pressed by the tip member of the hermetic plug to bulge in the outer peripheral direction and exhibit the sealing function. The shaft is used as a rotation operation shaft for attaching the sealing member, and the inner shaft is used as a rotation operation shaft for screwing rotation of the tip end member.

このように従前の密栓体の装着には水道本管からの水圧対応として二重軸構造を採用している。このため合フランジと挿入体の水密構造の他に内外二重軸の水密構造も必要となり構造の複雑化は免れられない。更にジャッキを付設するための構造や密栓体の構造が複雑になり、使用機材の構造が煩瑣となる問題がある。 In this way, a double-shaft structure is adopted for mounting the conventional sealing body in order to cope with the water pressure from the water main pipe. For this reason, in addition to the watertight structure of the mating flange and the insert, a watertight structure of inner and outer double shafts is also required, which inevitably complicates the structure. In addition, the structure for attaching the jack and the structure of the sealing member become complicated, and there is a problem that the structure of the equipment to be used becomes complicated.

そこで本発明は、使用機材の簡素化による新規に管分岐口の密閉方法及び密閉装置を提案したものである。 Accordingly, the present invention proposes a novel method and device for sealing a pipe branch opening by simplifying the equipment used.

本発明の請求項１記載に係る分岐管撤去方法は、本管から分岐した管分岐口に仕切弁機構を介して分岐管を連結した分岐管路において、管分岐口の内周面に外方側の周壁面より内方へ突出した螺条を形成しておき、仕切弁機構を閉弁状態で分岐管を分離した後、先方を前記螺条に螺合する螺子部を形成し、基方に外方側周壁面に密挿するシール部を設けた密栓体に挿入体を付設し、仕切弁機構の外方に装着する蓋容器体に前記密栓体を外周に間隙を有するように内置すると共に、挿入体を前記蓋容器体の外方に突出させて密栓体及び挿入体を移動阻止状態とし、前記密栓体及び挿入体と一体とした蓋容器体を分岐管に変えて装着して水封状態で密栓体を仕切弁機構外方に組み込み、仕切弁機構を開弁し、密栓体及び挿入体の移動阻止状態を解除して挿入体で密栓体を管分岐口に進入させ、密栓体を螺合装着することで密栓体のシール部を前記外方側周壁面内に押し込んで管分岐口を密閉し、然る後蓋容器体、仕切弁機構、挿入体を取り外してなるものである。 A branch pipe removing method according to claim 1 of the present invention is a branch pipe in which a branch pipe is connected to a pipe branch port branched from a main pipe via a gate valve mechanism. A thread protruding inward from the peripheral wall surface on the side is formed, and after separating the branch pipe with the sluice valve mechanism closed, a threaded portion for screwing the tip to the thread is formed. The insert is attached to the hermetic plug provided with a sealing portion to be tightly inserted into the outer peripheral wall surface, and the hermetic plug is placed inside the lid container body mounted on the outside of the sluice valve mechanism so as to have a gap on the outer periphery . At the same time, the insert is protruded to the outside of the lid container body to prevent the movement of the sealing member and the insert body, and the lid container body integrated with the seal plug and the insert body is changed into a branch pipe and installed to supply water. In a sealed state, the sealing body is assembled outside the gate valve mechanism, the gate valve mechanism is opened, the movement prevention state of the sealing body and the insert is released, and the sealing body is advanced into the pipe branch port by the insertion body, and the sealing body is By screwing the sealing part of the plug into the outer peripheral wall surface to seal the pipe branching port, the lid container, the gate valve mechanism, and the insert are removed. .

また本発明の請求項３記載に係る分岐管の撤去用具は、本管から分岐した管分岐口に仕切弁機構を介して分岐管を連結すると共に、管分岐口の内周面に外方側周壁面より内方へ突出した螺条を形成した分岐管路における分岐管の撤去用具で、密栓体と挿入体と蓋容器体で構成され、密栓体は、管分岐口の密閉栓となる形状で、先方に前記螺条に螺合する螺子部に形成すると共に、基方に前記螺条との螺合時に外方側周壁面に密挿するシール部を設けてなり、挿入体は、先端を密栓体の上面に回転操作可能で且つ着脱自在に設けた操作軸と、基方に設けた操作ハンドルを備えてなり、蓋容器体は、密栓体の外周に間隙を有するように収納し、操作軸を水封状態で外方に突出させ、密栓体を内方に組み込んだ状態で仕切弁機構に装着可能に形成すると共に、前記操作軸の突出箇所に操作軸の移動を阻止する挿入体保持機構を付設してなることを特徴とするものである。 A branch pipe removal tool according to claim 3 of the present invention connects a branch pipe to a pipe branch port branched from a main pipe via a gate valve mechanism, and has an outer side on the inner peripheral surface of the pipe branch port. A tool for removing a branch pipe in a branch pipe, which has a spiral thread protruding inward from the peripheral wall surface, and is composed of a sealing body, an insert body, and a lid container body, and the sealing body has a shape that serves as a sealing plug for the pipe branch opening. The insertion body has a screw portion formed on the front side thereof to be screwed into the screw thread, and a seal portion on the base side thereof to be tightly inserted into the outer peripheral wall surface when screwed with the screw thread. is provided on the upper surface of the hermetic plug so as to be rotatable and detachable, and an operating handle is provided on the base of the hermetic plug. The operating shaft protrudes outward in a water-sealed state , and the sealing member is incorporated inward so as to be attachable to the sluice valve mechanism . It is characterized in that it is provided with a holding mechanism .

而して分岐管を除去した仕切弁機構（閉弁状態）に、密栓体及び挿入体を組み込んだ蓋容器体を装着して仕切弁機構を開弁すると、密栓体の管分岐口への進出が可能となる。そこで挿入体を外部から操作して密栓体を管分岐口の位置まで押し込む。この押し込み操作においては密栓体下方に滞留する水は密栓体の外周間隙を通じて密栓体の上方に移動すると共に、押し込み反発力となる水圧は、操作軸の断面分の少ない面積に相当分の力しか加わらないので、人力で容易に押し込むことができる。そして密栓体の螺子部が螺条位置まで達して、挿入体による密栓体の回動に螺合操作が開始され、前記螺合操作途中でシール部が外方側周壁の位置に達すると密栓体の進出に対して本管の水圧が加わることになるが、螺合操作によって前記水圧に抗しての密栓体の進出が可能となり、密栓体全体が管分岐口内に納まると、管分岐口は密栓体で水封される。然る後各用具を取り外すものである。 Then, when the lid container body incorporating the seal plug and the insert is attached to the gate valve mechanism (valve closed state) from which the branch pipe is removed and the gate valve mechanism is opened, the seal plug advances into the pipe branch port. becomes possible. Therefore, the inserter is operated from the outside to push the sealing member to the position of the pipe branching opening. In this pushing operation, the water remaining below the sealing member moves upward through the outer peripheral gap of the sealing member. Since it does not join, it can be easily pushed in by human power. Then, when the screw portion of the sealing member reaches the thread position, the screwing operation is started by turning the sealing member by the inserting member, and when the sealing portion reaches the position of the outer peripheral wall during the screwing operation, the sealing member Although the water pressure of the main pipe is applied to the advance of the pipe, the screwing operation enables the advance of the sealing member against the water pressure. It is water-sealed with a hermetic plug. After that, each tool is removed.

また本発明の分岐管の撤去方法は、仕切弁機構開弁前に密栓体の移動を阻止した状態とし、当該阻止状態で開弁した後に阻止状態を解除してなるものであり、また本発明の分岐管の撤去用具は、蓋容器体に、内方に組み込んだ密栓体の移動を阻止する挿入体保持機構を付設してなるもので、開弁操作に際して密栓体と動作する弁体との接触を防止して、仕切弁機構が損傷することが無いようにしたものである。 In the method of removing the branch pipe of the present invention, the movement of the sealing member is prevented before the gate valve mechanism is opened, and the blocked state is released after the valve is opened in the blocked state. The removal tool for the branch pipe has an insertion body holding mechanism attached to the cover container body to prevent the movement of the sealing body incorporated inside. This prevents contact and damage to the sluice valve mechanism.

本発明の構成は上記のとおりで、分岐管の撤去が予測される分岐管路における管分岐口と、分岐管撤去後の管分岐口を密封する密栓体の連結に螺合構造を採用したもので、これによって水圧の抵抗を受ける管分岐口内への密栓体の進出を容易にして、ジャッキ力による外部力による押し込み構造や密栓体のシール膨出構造を不要にし、且つ挿入体に二軸構造を採用することなく、分岐管の撤去作業の用具の簡素化を実現したものである。 The configuration of the present invention is as described above, and employs a threaded structure for connecting a pipe branch opening in a branch pipe where the branch pipe is expected to be removed and a hermetic plug for sealing the pipe branch opening after removal of the branch pipe. This facilitates the advance of the sealing member into the pipe branching port, which is subject to water pressure resistance, and eliminates the need for a structure that pushes in the sealing member due to an external force due to a jacking force and a structure that bulges the sealing member. This realizes simplification of the tools for removing the branch pipe without adopting the

本発明（第一実施形態）の撤去用具の説明図。Explanatory drawing of the removal tool of this invention (1st embodiment). 同分岐管撤去作業の工程説明図（分岐管の除去）。Process explanatory drawing of the same branch pipe removal work (removal of a branch pipe). 同図（用具の装着）。The same figure (wearing of tools). 同図（密栓体の装着）。The same figure (attachment of the hermetic plug). 同図（ハンドルと蓋容器体の取外し）。The same figure (removal of the handle and lid container body). 同図（仕切弁機構と操作軸の取外し）。The same figure (removal of the gate valve mechanism and the operation shaft). 同図（終了状態）。The same figure (finished state). 同第二実施形態の挿入体保持機構の説明図。Explanatory drawing of the insertion body holding mechanism of the second embodiment. 同分岐管撤去作業の工程説明図（用具装着状態）。Process explanatory drawing of the same branch pipe removal work (instrument installation state). 同挿入体保持機構の動作説明図。Operation explanatory drawing of the insertion body holding mechanism.

次に本発明の実施形態について説明する。実施形態として示した分岐管の撤去の対象管路は、水道本管Ａに分岐管Ｂを設ける際に、水道本管Ａの外周面を覆うように二分割されたサドル部材１及び支持部材２を装着し、適宜な連結ボルト３で水道本管Ａに挟圧固定し、管分岐口１１を備えたサドル部材１に仕切弁機構Ｃを装着し、仕切弁機構Ｃを介在させて公知の穿孔装置を装着して水道本管Ａに通水孔ａを穿設し、穿孔終了後に前記穿孔装置を外して分岐管Ｂを連結し、分岐管路を構築しているものである。尚サドル部材１、仕切弁機構Ｃ、分岐管Ｂはフランジで連結されている。 Next, embodiments of the present invention will be described. The target pipeline for removal of the branch pipe shown as an embodiment is a saddle member 1 and a support member 2 that are divided into two so as to cover the outer peripheral surface of the water main A when the branch pipe B is provided in the water main A. is attached, and is clamped and fixed to the water main pipe A with an appropriate connecting bolt 3, the gate valve mechanism C is attached to the saddle member 1 provided with the pipe branch port 11, and the gate valve mechanism C is interposed to perform a known perforation A water passage hole a is drilled in the water main pipe A by installing the device, and after the completion of drilling, the drilling device is removed and the branch pipe B is connected to construct a branch pipeline. The saddle member 1, the gate valve mechanism C, and the branch pipe B are connected by flanges.

特に本発明は、前記のサドル部材１における管分岐口１１の内周面に外方側の周壁面１２より水道本管Ａ側の径が小さくなるように、内方へ突出した螺条１３を形成しておくものである。 In particular, in the present invention, the inner peripheral surface of the pipe branch port 11 of the saddle member 1 is provided with an inwardly protruding screw thread 13 so that the diameter of the water main pipe A side is smaller than that of the outer peripheral wall surface 12 . It should be formed.

本発明の分岐管の撤去用具は、密栓体４と挿入体５と蓋容器体６と蓋板７で構成される。 The branch tube removal tool of the present invention is composed of a sealing plug 4, an insert 5, a lid container 6, and a lid plate 7. As shown in FIG.

密栓体４は、管分岐口１１の密閉栓となるもので、先方に螺条１３に螺合する螺子部４１に形成し、基方に外方側周壁面との間を水封するシール部材を装着したシール部４２を設けてなる。 The sealing member 4 serves as a sealing plug for the pipe branching port 11. The sealing member 4 is formed as a threaded portion 41 to be screwed into the thread 13 at the front, and is a sealing member at the base for water-sealing with the outer peripheral wall surface. is provided with a seal portion 42 having a

特に外方側周壁面１２、螺条１３、螺子部４１及びシール部４２の各形成位置は、螺子部４１を螺条１３に螺合している途中からシール部４２が外方側周壁面１２で囲繞された空間に進出するようしてなるものである。また上面には挿入体５との連結部（螺孔）４３を設ける。 In particular, the formation positions of the outer peripheral wall surface 12 , the thread 13 , the threaded portion 41 and the seal portion 42 are such that the seal portion 42 is formed on the outer peripheral wall surface 12 from the middle of the threaded portion 41 being screwed to the threaded portion 13 . It is like advancing into a space surrounded by. Also, a connecting portion (screw hole) 43 for connection with the insert 5 is provided on the upper surface.

挿入体５は、適宜長さの操作軸５１と密栓体連結部５２と操作ハンドル５３で構成され、密栓体連結部５２は、操作軸先端に固定した連結板５２ａと連結板５２ａを密栓体４の上面に位置させて螺孔４３に螺着する止着ボルト５２ｂからなる。操作ハンドル５３は操作軸５１の基端に、着脱自在に連結したもので、操作軸５１の軸方向操作及び回転操作を行うものである。 The insert 5 is composed of an operation shaft 51 having an appropriate length, a sealing body connecting portion 52 and an operating handle 53. The sealing body connecting portion 52 is made up of a connecting plate 52a fixed to the tip of the operating shaft and connecting the connecting plate 52a to the sealing body 4. It consists of a fixing bolt 52b that is positioned on the upper surface of the screw hole 43 and screwed into the screw hole 43. As shown in FIG. The operating handle 53 is detachably connected to the proximal end of the operating shaft 51 and is used to operate the operating shaft 51 in the axial direction and rotate it.

蓋容器体６は、下方が開口し上面が塞がれた密栓体４を収納する空間を備えた本体部６１と、本体部６１の上面に操作軸５１のガイド筒部６２を突設し、ガイド筒部６２内にＯリング６３を装着してなる。更に本体部６１上方外周に持ち手６４を突設し、下縁にはフランジ６５を周設してなる。 The lid container body 6 has a body portion 61 having a space for storing the hermetic plug 4 whose bottom is open and whose top is closed. An O-ring 63 is mounted inside the guide tube portion 62 . Further, a handle 64 is protruded from the outer circumference of the upper portion of the body portion 61, and a flange 65 is provided around the lower edge.

また蓋板７は、各フランジ形状と一致する板体である。 Also, the cover plate 7 is a plate body that matches the shape of each flange.

次に上記の撤去用具を使用して、分岐管Ｂの撤去手順ついて説明する。最初に仕切弁機構Ｃを操作して閉弁状態とし、分岐管Ｂを分離する（図２）。 Next, a procedure for removing the branch pipe B using the removal tool described above will be described. First, the sluice valve mechanism C is operated to close the valve, and the branch pipe B is separated (Fig. 2).

次に密栓体４に操作軸５１を連結し、密栓体４を本体部６１内に収納すると共に、操作軸５１をガイド筒部６２から突出させ、突出している操作軸５１に操作ハンドル５３を取り付けて撤去用具を組み上げる、この組み上げた撤去用具をフランジ６５で仕切弁機構Ｃのフランジに装着する（図３）。 Next, the operation shaft 51 is connected to the hermetic plug 4, and the hermetic plug 4 is accommodated in the body portion 61. At the same time, the operating shaft 51 is protruded from the guide tube portion 62, and the operating handle 53 is attached to the protruding operating shaft 51. This assembled removal tool is attached to the flange of the gate valve mechanism C with a flange 65 (Fig. 3).

次に仕切弁機構Ｃを開弁して、密栓体４の管分岐口１１方向への進出を可能とし、操作ハンドル５３で密栓体４を、管分岐口１１の位置まで押し込む。この押し込み操作においては密栓体４の下方に滞留する水は密栓体４の外周間隙を通じて密栓体４の上方に移動すると共に、押し込み反発力となる水圧は、操作軸の断面分の少ない面積に相当分の力しか加わらないので、人力で容易に押し込むことができる。 Next, the gate valve mechanism C is opened to allow the sealing member 4 to advance toward the pipe branching port 11 , and the sealing member 4 is pushed to the position of the pipe branching port 11 by the operation handle 53 . In this pushing operation, the water remaining below the sealing member 4 moves upward through the outer peripheral gap of the sealing member 4, and the water pressure acting as the pushing repulsive force corresponds to the small area of the cross section of the operating shaft. Since only 100% of force is applied, it can be easily pushed in by human power.

密栓体４の螺子部４１が螺条１３の位置まで達すると、操作ハンドル５３を回転操作して密栓体４を螺条１３に螺合させる。この螺合操作中にシール部４２が外方側周壁面１２の位置に達すると密栓体４の進出に対して水道本管Ａの水圧が加わることになるが、螺合操作によって前記水圧に抗しての密栓体４の進出が可能であり、密栓体４全体を管分岐口１１内に納めて管分岐口１１を水封する（図４）。 When the screw portion 41 of the sealing member 4 reaches the screw thread 13 , the operation handle 53 is rotated to screw the sealing member 4 onto the screw thread 13 . When the seal portion 42 reaches the position of the outer peripheral wall surface 12 during this screwing operation, the water pressure of the water main pipe A is applied to the advance of the sealing member 4, but the water pressure is resisted by the screwing operation. The sealing member 4 can be pushed forward as a whole, and the entire sealing member 4 is housed in the pipe branching port 11 to water-seal the pipe branching port 11 (FIG. 4).

密栓体４を管分岐口１１に装着した後には、操作ハンドル５３を操作軸５１から取り外し、蓋容器体６を操作軸５１に沿って引き抜き分離する（図５）。 After attaching the sealing member 4 to the pipe branching port 11, the operating handle 53 is removed from the operating shaft 51, and the lid container body 6 is pulled out along the operating shaft 51 and separated (FIG. 5).

更に開弁状態の仕切弁機構Ｃを取り外す。仕切弁機構Ｃを除去すると管分岐口１１に装着された密栓体４と密栓体４に連結した操作軸５１が残るので、止着ボルト５２ｂの螺孔４３との螺合を解除して操作軸５１を取り外す（図６）。 Furthermore, the gate valve mechanism C in the open state is removed. When the gate valve mechanism C is removed, the sealing member 4 attached to the pipe branching port 11 and the operation shaft 51 connected to the sealing member 4 remain. 51 is removed (Fig. 6).

全ての部材（サドル部材１及び支持部材２以外）を取り外した後に、密栓体を装着した管分岐口１１の上面に蓋板７を取り付けて分岐管撤去作業を終了する（図７）。 After removing all the members (other than the saddle member 1 and the support member 2), the cover plate 7 is attached to the upper surface of the pipe branch port 11 fitted with the sealing member, and the branch pipe removing operation is completed (Fig. 7).

次に蓋容器体６に挿入体保持機構を付設した第二実施形態につて説明する。挿入体保持機構は、上述した第一実施形態の蓋容器体６において、ガイド筒部６２の外周面にネジ部６２１を設けると共に、頂面に内側に傾斜する傾斜押圧面６２２を形成しておき、前記傾斜押圧面６２２上に止着用の弾性シールリング６２３を載置し、止着操作部材６６を装着してなるものである（図８）。 Next, a second embodiment in which an insert holding mechanism is attached to the lid container body 6 will be described. In the lid container body 6 of the first embodiment described above, the insert body holding mechanism is provided with a threaded portion 621 on the outer peripheral surface of the guide tube portion 62 and an inwardly inclined pressing surface 622 on the top surface. , an elastic seal ring 623 for fastening is placed on the inclined pressing surface 622, and a fastening operation member 66 is attached (FIG. 8).

止着操作部材６６は、ガイド筒部６２に被冠するキャップ体６６１に操作レバー６６２を突設したもので、特にキャップ体６６１は、上面に操作軸５１の挿通孔６６３を設け、内周面にネジ部６２１と螺合する内ネジ部６６４を設けたものである。 The fixing operation member 66 is formed by projecting an operation lever 662 from a cap body 661 covering the guide tube portion 62. In particular, the cap body 661 is provided with an insertion hole 663 for the operation shaft 51 on its upper surface, and an inner peripheral surface of the cap body 661. An inner threaded portion 664 that is screwed with the threaded portion 621 is provided on the inner side.

而して蓋容器体６のガイド筒部６２に止着操作部材６６を螺合装着し、第一実施形態と同様の手順で撤去用具を使用して分岐管の撤去作業を行うものである。 Then, the fastening operation member 66 is screwed into the guide tube portion 62 of the lid container body 6, and the branch pipe is removed using the removal tool in the same procedure as in the first embodiment.

最初に仕切弁機構Ｃを操作して閉弁状態とし、分岐管Ｂを分離し、撤去用具を装着するもので、装着に際して特に操作軸５１を連結した密栓体４を蓋容器体６の本体部６１内に収納して、操作軸５１をガイド筒部６２から突出させておく。 First, the sluice valve mechanism C is operated to close the valve, the branch pipe B is separated, and the removal tool is attached. 61 , and the operation shaft 51 is protruded from the guide tube portion 62 .

この操作軸５１の突出に際し、はじめは止着操作部材６６を緩やかな螺合状態としておくことで操作軸５１はガイド筒部６２及び挿通孔６６３内を自由に移動できるが（図１０イ）、操作レバー６６２で止着操作部材６６を螺合緊締すると、弾性シールリング６２３が傾斜押圧面６２２とキャップ体６６１の内面の間で加圧され偏平状態となって操作軸５１を圧することになり、操作軸５１が移動できない状態（保持状態・図１０ロ）となる。 When the operation shaft 51 protrudes, the operation shaft 51 can move freely within the guide tube portion 62 and the insertion hole 663 by first gently screwing the fixing operation member 66 (FIG. 10A). When the fixing operation member 66 is screwed and tightened by the operation lever 662, the elastic seal ring 623 is pressurized between the inclined pressing surface 622 and the inner surface of the cap body 661 and is flattened to press the operation shaft 51. The operating shaft 51 is in a state where it cannot move (holding state, FIG. 10B).

従って、密栓体４が蓋容器体６の本体部６１内の所定位置（密栓体４が蓋容器体６より下方に突出していない状態）で、止着操作部材６６を操作して挿入体５（操作軸５１）を保持状態とし、蓋容器体６をフランジ６５で仕切弁機構Ｃのフランジに装着する（図９）。 Therefore, when the sealing member 4 is at a predetermined position inside the main body 61 of the lid container body 6 (the state where the sealing member 4 does not protrude downward from the lid container body 6), the fastening operation member 66 is operated and the insertion body 5 ( With the operating shaft 51) held, the lid container body 6 is attached to the flange of the sluice valve mechanism C with the flange 65 (FIG. 9).

然る後仕切弁機構Ｃを開弁し、止着操作部材６６を操作して挿入体５の保持状態を解除し、第一実施形態と同様に密栓体４で管分岐口１１を水封するものである。 After that, the sluice valve mechanism C is opened, the holding operation member 66 is operated to release the holding state of the insert 5, and the pipe branch port 11 is water-sealed with the sealing plug 4 in the same manner as in the first embodiment. It is a thing.

以上のように第二実施形態は特に蓋容器体６に、本体部６１内に組み込んだ密栓体４の移動を阻止する挿入体保持機構を付設したものであるから、開弁操作に際して密栓体４と動作する弁体との接触が防止され、仕切弁機構を損傷させることがないようにしたものである。 As described above, in the second embodiment, the lid container body 6 is provided with an insertion body holding mechanism for preventing movement of the sealing body 4 incorporated in the main body part 61. This prevents contact with the valve body that operates and damages the sluice valve mechanism.

尚前記両実施形態は新たに分岐管Ｂを連結するのにサドル部材１及び支持部材２を使用した例を示したが、本管に管分岐口を予め形成したＴ字管を採用する場合には、管分岐口に所定の螺条を形成した管分岐口をそなえたものを採用することで本発明を実施することができる。 In the above-described two embodiments, the saddle member 1 and the support member 2 are used to newly connect the branch pipe B. The present invention can be carried out by adopting a pipe branch opening having a predetermined screw thread formed in the pipe branch opening.

１サドル部材
１１管分岐口
１２外方側周壁面
１３螺条
２支持部材
３連結ボルト
４密栓体
４１螺子部
４２シール部
４３連結部（螺孔）
５挿入体
５１操作軸
５２密栓体連結部
５２ａ連結板
５２ｂ止着ボルト
５３操作ハンドル
６蓋容器体
６１本体部
６２ガイド筒部
６２１ネジ部
６２２傾斜押圧面
６２３弾性シールリング
６３Ｏリング
６４持ち手
６５フランジ
６６止着操作部材
６６１キャップ体
６６２操作レバー
６６３挿通孔
６６４内ネジ部
７蓋板
Ａ水道本管
Ｂ分岐管
Ｃ仕切弁機構
ａ通水孔 1 Saddle member 11 Pipe branching port 12 Outer peripheral wall surface 13 Thread 2 Supporting member 3 Connecting bolt 4 Sealing body 41 Threaded portion 42 Sealing portion 43 Connecting portion (threaded hole)
5 Insert 51 Operating shaft 52 Sealing body connecting portion 52a Connecting plate 52b Fixing bolt 53 Operating handle 6 Lid container body 61 Body portion 62 Guide tube portion 621 Threaded portion 622 Inclined pressing surface 623 Elastic seal ring 63 O-ring 64 Handle 65 Flange 66 Fastening operation member 661 Cap body 662 Operation lever 663 Insertion hole 664 Internal screw portion 7 Lid plate A Water main pipe B Branch pipe C Gate valve mechanism a Water passage hole

Claims

本管から分岐した管分岐口に仕切弁機構を介して分岐管を連結した分岐管路において、
管分岐口の内周面に外方側の周壁面より内方へ突出した螺条を形成しておき、
仕切弁機構を閉弁状態で分岐管を分離した後、
先方を前記螺条に螺合する螺子部を形成し、基方に外方側周壁面に密挿するシール部を設けた密栓体に挿入体を付設し、
仕切弁機構の外方に装着する蓋容器体に前記密栓体を外周に間隙を有するように内置すると共に、挿入体を前記蓋容器体の外方に突出させて密栓体及び挿入体を移動阻止状態とし、
前記密栓体及び挿入体と一体とした蓋容器体を分岐管に変えて装着して水封状態で密栓体を仕切弁機構外方に組み込み、
仕切弁機構を開弁し、密栓体及び挿入体の移動阻止状態を解除して挿入体で密栓体を管分岐口に進入させ、
密栓体を螺合装着することで密栓体のシール部を前記外方側周壁面内に押し込んで管分岐口を密閉し、
然る後蓋容器体、仕切弁機構、挿入体を取り外してなる分岐管の撤去方法。 In a branch pipe line in which a branch pipe is connected to a pipe branch port branched from a main pipe via a gate valve mechanism,
The inner peripheral surface of the pipe branching port is formed with a thread protruding inward from the outer peripheral wall surface,
After separating the branch pipe with the sluice valve mechanism closed,
an insertion body is attached to a hermetic plug body having a threaded portion for screwing the tip thereof into the screw thread, and a base portion provided with a sealing portion for tightly inserting into the outer peripheral wall surface;
The sealing member is placed inside the lid container body mounted on the outside of the sluice valve mechanism so as to have a gap on the outer periphery thereof, and the insert is protruded outside the lid container body to prevent movement of the sealing member and the insert body. state and
The lid container body integrated with the sealing plug and the insert is replaced with a branch pipe, and the sealing plug is assembled to the outside of the gate valve mechanism in a water-sealed state,
opening the sluice valve mechanism, canceling the movement blocking state of the sealing member and the insert, and allowing the sealing member to enter the pipe branch port with the insert;
By screwing the sealing member, the sealing portion of the sealing member is pushed into the outer peripheral wall surface to seal the pipe branch port,
A method for removing the branch pipe by removing the rear lid container body, the sluice valve mechanism, and the insert body.

分岐管路の分岐構成を、本管外周面を覆うように装着される分岐口を備えたサドル部材と、前記サドル部材とで本管を挟持する支持部材で構成してなる請求項１記載の分岐管の撤去方法。 2. The branching structure according to claim 1, wherein the branching structure of the branch pipeline is composed of a saddle member having a branch port mounted so as to cover the outer peripheral surface of the main pipe, and a support member sandwiching the main pipe with the saddle member. How to remove the branch pipe.

本管から分岐した管分岐口に仕切弁機構を介して分岐管を連結すると共に、管分岐口の内周面に外方側周壁面より内方へ突出した螺条を形成した分岐管路における分岐管の撤去用具で、
密栓体と挿入体と蓋容器体で構成され、
密栓体は、管分岐口の密閉栓となる形状で、先方に前記螺条に螺合する螺子部に形成すると共に、基方に前記螺条との螺合時に外方側周壁面に密挿するシール部を設けてなり、
挿入体は、先端を密栓体の上面に回転操作可能で且つ着脱自在に設けた操作軸と、基方に設けた操作ハンドルを備えてなり、
蓋容器体は、密栓体の外周に間隙を有するように収納し、操作軸を水封状態で外方に突出させ、密栓体を内方に組み込んだ状態で仕切弁機構に装着可能に形成すると共に、前記操作軸の突出箇所に操作軸の移動を阻止する挿入体保持機構を付設してなることを特徴とする分岐管の撤去用具。 In a branch pipeline in which a branch pipe is connected via a gate valve mechanism to a pipe branch port branched from a main pipe, and a spiral thread protruding inward from the outer peripheral wall surface is formed on the inner peripheral surface of the pipe branch port With a branch pipe removal tool,
Consists of a hermetic plug body, an insert body and a lid container body,
The hermetic plug has a shape to be a hermetic plug for the pipe branching opening, and is formed on the threaded portion to be screwed to the thread on the front side, and is tightly inserted on the outer side peripheral wall surface when screwed on the thread on the base side. It is provided with a seal part that
The inserting body comprises an operating shaft having a distal end rotatably and detachably provided on the upper surface of the sealing member, and an operating handle provided at the base,
The lid container body is housed so as to have a gap around the outer periphery of the hermetic plug, the operation shaft protrudes outward in a water-sealed state, and the hermetic plug is incorporated inside so that it can be attached to the sluice valve mechanism. In addition, a branch pipe removing tool is characterized in that an insertion body holding mechanism for preventing movement of the operating shaft is attached to the projecting portion of the operating shaft .

挿入体保持機構を、蓋容器体における操作軸の突出部分をガイド筒部に形成すると共に、前記ガイド筒部の外周面にネジ部を設け、ガイド筒部の頂面を内側へ傾斜する傾斜押圧面に形成し、前記傾斜押圧面上に止着用の弾性シールリングを載置し、The insertion body holding mechanism is formed by forming the protruding portion of the operation shaft in the lid container body in the guide tube, providing a threaded portion on the outer peripheral surface of the guide tube, and tilting the top surface of the guide tube inwardly. an elastic seal ring for fastening is placed on the inclined pressing surface;
前記ガイド筒部に被冠し且つ上面に操作軸の挿通孔を設けると共に、内周面に前記ネジ部と螺合する内ネジ部を設けたキャップ体に、操作レバーを突設した止着操作部材を、ガイド筒部に装着して構成した請求項３記載の分岐管の撤去用具。A fixing operation in which an operation lever is protruded from a cap body that covers the guide tube portion, has an insertion hole for an operation shaft provided on the upper surface, and has an inner screw portion that is screwed with the screw portion on the inner peripheral surface. 4. The branch pipe removal tool according to claim 3, wherein the member is attached to the guide cylinder.