JP2014084903A

JP2014084903A - Attaching/detaching device of pipe connection member

Info

Publication number: JP2014084903A
Application number: JP2012232093A
Authority: JP
Inventors: Yoichiro Hoshino; 洋一郎星野
Original assignee: Cosmo Koki Co Ltd
Current assignee: Cosmo Koki Co Ltd
Priority date: 2012-10-19
Filing date: 2012-10-19
Publication date: 2014-05-12
Anticipated expiration: 2032-10-19
Also published as: JP6043144B2

Abstract

PROBLEM TO BE SOLVED: To provide an attaching/detaching device of a pipe connection member capable of forming a sufficient clearance gap to insert a partitioning valve element between opposed faces of flanges without making one of the flanges move while inclining to the other flange, or moving the flanges, in making a pressure of a fluid in a fluid pipe act on the pair of flanges.SOLUTION: In an attaching/detaching device 9 of a pipe connection member in which a flange disposed between a branch portion of an existing fluid pipe and a pipe connection member connected to the branch portion, is externally fitted in a sealed state by mounting members 13, 14, 15 including valve elements 11 inside thereof, and the valve element 11 is inserted between opposed faces of the flanges through a plurality of connection tools connecting the flanges so that the pipe connection members 4 is attached and detached while closing the branch portion, the mounting members 13, 14, 15 respectively have a divided structure divided into at least three or more.

Description

本発明は、既設流体管の分岐部と該分岐部に接続された管接続部材との間に介在するフランジが、内部に弁体を備えた取付部材で密封状に外嵌されるとともに、前記弁体が、前記フランジを接続する複数の接続具同士の間を通して、前記フランジの対向面間に挿入されることで、前記分岐部を閉塞して管接続部材を脱着する管接続部材の脱着装置に関する。 According to the present invention, a flange interposed between a branch portion of an existing fluid pipe and a pipe connection member connected to the branch portion is externally fitted in a sealing manner with an attachment member having a valve body therein, and A pipe connecting member detaching device that closes the branch portion and detaches the pipe connecting member by inserting a valve body between a plurality of connecting tools connecting the flanges and facing the flanges. About.

従来、既設の流体管（連通管）にフランジを介して取り付けられた空気弁や補修弁等の管接続部材の補修や交換を行う際には、流体管側の流れを不断流状態に維持しつつ、管接続部材が流体管に対して脱着させる。この際、内部に弁体が備えられた取付部材を有する脱着装置が、管接続部材のフランジにその外方から密封状に取り付けられたうえで、流体管及び管接続部材のフランジの対向面間に間隙が形成される。そして、この間隙に弁体を挿入して流体管を閉塞させることで、管接続部材を流体管に対して着脱可能にしている。 Conventionally, when repairing or replacing a pipe connection member such as an air valve or a repair valve attached to an existing fluid pipe (communication pipe) via a flange, the flow on the fluid pipe side is maintained in an uninterrupted state. Meanwhile, the pipe connecting member is detached from the fluid pipe. At this time, the attachment / detachment device having an attachment member provided with a valve body is attached to the flange of the pipe connection member in a sealed manner from the outside, and between the opposing surfaces of the flange of the fluid pipe and the pipe connection member A gap is formed. And by inserting a valve body into this gap and closing the fluid pipe, the pipe connecting member can be attached to and detached from the fluid pipe.

このような着脱装置としては、二分割された装着自在な作業用カバー（取付部材）を、両管部（連通管及び管接続部材）の両連結フランジ部（フランジ）にその外周側から密封状に取り付けて、この作業用カバー内で、両連結フランジ部を管軸方向に移動させて両連結フランジ部間に隙間を形成するとともに、この間隙内にある両連結フランジ部を接続するボルト（接続具）同士の間に仕切弁体（弁体）を通して、仕切弁体を流路遮断位置にまで差し入れることにより、両連結フランジ部の流路を遮断するようにしたものがある（例えば、特許文献１参照）。 As such an attaching / detaching device, a work cover (attachment member) that is freely mounted in two parts is sealed from both outer peripheral sides to both connecting flange portions (flange) of both pipe portions (communication pipe and pipe connecting member). In this working cover, both connecting flanges are moved in the direction of the pipe axis to form a gap between the connecting flanges, and the bolts (connections) that connect the two connecting flanges in the gap are connected. There is one in which the flow path of both connecting flange portions is blocked by inserting the gate valve body to the flow path blocking position through the gate valve body (valve body) between the components (for example, patents) Reference 1).

特開２００８−１０６９４２号公報（第８頁、第３図）JP 2008-106942 (page 8, FIG. 3)

しかしながら、特許文献１にあっては、作業用カバー（取付部材）が、二分割構造の締付輪で構成されるとともに、各締付輪の外側周の両端に設けられた連結片（掛合部）がボルト・ナットで引き寄せられつつ接続されることで、作業用カバーは、径方向外方から締め付けられて、両連結フランジ部に対して固定されるので、作業用カバーには、二方向から締め付け力が加えられて、作業用カバーが両連結フランジ部を押圧する力が局所的に強く作用することになる。このため、両連結フランジ部に流体管内の流体の圧力を作用させた際に、一方のフランジが他方のフランジに対して傾いて移動したり、フランジが移動しなかったりして、両連結フランジ部の対向面間に、仕切弁体を挿入するための十分な間隙が形成されず、間隙形成のために追加作業を要することになり、作業効率と低下させるといった問題がある。 However, in Patent Document 1, the work cover (attachment member) is configured by a two-part structure fastening ring, and connecting pieces (engagement portions) provided at both ends of the outer periphery of each fastening ring. ) Are connected while being pulled by bolts and nuts, the work cover is tightened from the outside in the radial direction and fixed to both connecting flanges. A tightening force is applied, and the force with which the work cover presses both the connecting flange portions acts locally and strongly. For this reason, when the pressure of the fluid in the fluid pipe is applied to both connecting flange portions, one flange moves with an inclination relative to the other flange, or the flange does not move. A sufficient gap for inserting the gate valve body is not formed between the opposing surfaces, and additional work is required to form the gap, resulting in a problem that the work efficiency is lowered.

本発明は、このような問題点に着目してなされたもので、一対のフランジに流体管内の流体の圧力を作用させた際に、一方のフランジが他方のフランジに対して傾いて移動したり、フランジが移動しなかったりすることがなく、仕切弁体を挿入するために十分な間隙が、フランジの対向面間に形成される管接続部材の脱着装置を提供することを目的とする。 The present invention has been made paying attention to such problems, and when the pressure of the fluid in the fluid pipe is applied to a pair of flanges, one flange is inclined and moved with respect to the other flange. An object of the present invention is to provide a pipe connecting member detaching apparatus in which a flange does not move and a gap sufficient to insert a gate valve body is formed between opposing surfaces of the flange.

前記課題を解決するために、本発明の管接続部材の脱着装置は、
既設流体管の分岐部と該分岐部に接続された管接続部材との間に介在するフランジが、内部に弁体を備えた取付部材で密封状に外嵌されるとともに、前記弁体が、前記フランジを接続する複数の接続具同士の間を通して、前記フランジの対向面間に挿入されることで、前記分岐部を閉塞して管接続部材を脱着する管接続部材の脱着装置であって、
前記取付部材が、少なくとも３つ以上に分割された分割構造を有することを特徴としている。
この特徴によれば、前記取付部材が、少なくとも３つ以上に分割された分割構造を有することで、既設流体管の分岐部と該分岐部に接続された管接続部材との間に介在するフランジが、内部に弁体を備えた取付部材で密封状に外嵌される際に、前記取付部材には、少なくとも三方向から締め付け力が加えられて、前記取付部材が前記フランジを押圧する力が少なくとも三か所以上に分散されて作用することになる。したがって、前記フランジに加えられる押圧力が前記フランジの周方向に均一化される。これにより、前記フランジに前記既設流体管内の流体の圧力を作用させた際に、前記フランジが管軸方向に円滑に移動されて、前記弁体を挿入するための十分な間隙が容易に形成されることになり、作業効率を向上させることができる。 In order to solve the above-mentioned problem, a desorption device for a pipe connection member of the present invention is
A flange interposed between a branch part of an existing fluid pipe and a pipe connection member connected to the branch part is fitted in a sealing manner with an attachment member having a valve body therein, and the valve body is A desorption device for a pipe connection member, which is inserted between opposing surfaces of the flange through a plurality of connecting tools for connecting the flange, and closes the branch portion to desorb the pipe connection member,
The attachment member has a divided structure divided into at least three or more.
According to this feature, the attachment member has a divided structure divided into at least three or more, so that the flange is interposed between the branch portion of the existing fluid pipe and the pipe connection member connected to the branch portion. However, when the fitting member having a valve body is fitted in a sealing manner, a tightening force is applied to the attachment member from at least three directions, and the force by which the attachment member presses the flange is applied. It will be distributed and act in at least three places. Therefore, the pressing force applied to the flange is made uniform in the circumferential direction of the flange. Accordingly, when the pressure of the fluid in the existing fluid pipe is applied to the flange, the flange is smoothly moved in the pipe axis direction, and a sufficient gap for inserting the valve body is easily formed. As a result, work efficiency can be improved.

本発明の管接続部材の脱着装置は、
前記取付部材が、前記弁体を収容する弁収容部を有するとともに前記フランジの外周の略半周を覆う第１部材と、前記フランジの外周の残りを略等分して覆う第２部材及び第３部材からなる三分割構造を有することを特徴としている。
この特徴によれば、前記取付部材が、前記弁体を収容する弁収容部を有するとともに前記フランジの外周の略半周を覆う第１部材と、前記フランジの外周の残りを略等分して覆う第２部材及び第３部材からなる三分割構造を有することで、前記取付部材が複数に構成されても容易に組み付けられるので、作業効率を向上することができ、尚且つ、前記第１部材が前記フランジの外周の略半周を覆う形状をなすことで、前記分岐部を閉塞するのに十分な横幅を有する前記弁体を収容できる前記弁収容部を設けることができる。 The desorption device for the pipe connecting member of the present invention comprises:
The mounting member has a valve housing portion that houses the valve body, and a first member that covers a substantially half circumference of the outer periphery of the flange, a second member that covers the remainder of the outer circumference of the flange substantially equally, and a third member It has a three-part structure composed of members.
According to this feature, the mounting member has a valve housing portion that houses the valve body, and covers the first member that covers a substantially half circumference of the outer periphery of the flange, and the remainder of the outer periphery of the flange that is substantially equally divided. By having a three-part structure composed of the second member and the third member, the mounting member can be easily assembled even if it is configured in a plurality, so that the working efficiency can be improved, and the first member is By forming a shape that covers a substantially half circumference of the outer periphery of the flange, it is possible to provide the valve accommodating portion that can accommodate the valve body having a lateral width sufficient to close the branch portion.

本発明の管接続部材の脱着装置は、
前記取付部材が、前記フランジの内径方向に向かって膨出する膨出部を備えていることを特徴としている。
この特徴によれば、前記取付部材が、前記フランジの内径方向に向かって膨出する膨出部を備えているので、前記取付部材を前記フランジに外嵌させる際に、前記フランジの対向面間に前記各部材の前記膨出部を挿入することで、前記膨出部によって前記取付部材がそれぞれ支持されて前記フランジに仮固定されるので、前記取付部材を安定させた状態で、前記取付部材の前記フランジに対する周方向位置を容易に微調整することができる。 The desorption device for the pipe connecting member of the present invention comprises:
The attachment member includes a bulging portion that bulges toward an inner diameter direction of the flange.
According to this feature, since the mounting member includes a bulging portion that bulges toward the inner diameter direction of the flange, when the mounting member is externally fitted to the flange, the gap between the opposing surfaces of the flange By inserting the bulging portion of each member into the bulging portion, the mounting member is supported by the bulging portion and temporarily fixed to the flange. The position in the circumferential direction with respect to the flange can be easily finely adjusted.

本発明に係る管接続部材としての空気弁及びフランジ短管が連通管に接続された状態を示す正面図である。It is a front view which shows the state by which the air valve and flange short pipe as a pipe connection member concerning this invention were connected to the communicating pipe. （ａ）は、脱着装置の上面図であり、（ｂ）は、同じく側面図である。(A) is a top view of a desorption apparatus, (b) is a side view similarly. （ａ）は、脱着装置を示す上断面図であり、（ｂ）は、図２におけるＡ−Ａ断面を示す側断面図である。(A) is an upper sectional view showing a desorption device, and (b) is a side sectional view showing an AA section in FIG. 2. （ａ）は、第２密封部材を示す拡大側断面図であり、（ｂ）は、同じく変形例を示す拡大側断面図である。(A) is an expanded side sectional view which shows a 2nd sealing member, (b) is an enlarged side sectional view which similarly shows a modification. （ａ）は、脱着装置の弁体を示す上面図であり、（ｂ）は、（ａ）におけるＢ−Ｂ断面を示す側断面図であり、（ｃ）は、（ａ）におけるＣ−Ｃ断面を示す正断面図である。(A) is a top view which shows the valve body of a desorption apparatus, (b) is a sectional side view which shows the BB cross section in (a), (c) is CC in (a). It is a front sectional view showing a section. （ａ）は、フランジを締結する作業用ボルトを示す側断面図であり、（ｂ）は、同じく変形例を示す側断面図である。(A) is a sectional side view which shows the working bolt which fastens a flange, (b) is a sectional side view which similarly shows a modification. 脱着装置がフランジに取付けられた状態を示す正面図である。It is a front view which shows the state in which the removal | desorption apparatus was attached to the flange. （ａ）は、フランジ同士が離間した状態で、脱着装置より弁体を挿入する様子を示す側断面図であり、（ｂ）は、同じく上断面図である。(A) is a sectional side view which shows a mode that a valve body is inserted from a removal | desorption apparatus in the state which flanges separated, (b) is an upper sectional view similarly. （ａ）は、弁体の可変部がフランジのボルト同士の間を通過する様子を示す側断面図であり、（ｂ）は、同じく上断面図である。(A) is a sectional side view which shows a mode that the variable part of a valve body passes between the bolts of a flange, (b) is also an upper sectional view. 弁体がフランジの対向面間に挿入された状態を示す側断面図である。It is a sectional side view which shows the state by which the valve body was inserted between the opposing surfaces of a flange. 閉塞装置が取り付けられた状態を示す一部断面図である。It is a partial cross section figure which shows the state in which the closure apparatus was attached. 閉塞部材が連通管に設置された状態を示す断面図である。It is sectional drawing which shows the state in which the obstruction | occlusion member was installed in the communicating pipe. 取付部材及び収容ケースが取り外された状態を示す断面図である。It is sectional drawing which shows the state from which the attachment member and the storage case were removed. 連通管に補修弁及び収容ケースが取り付けられた状態を示す断面図である。It is sectional drawing which shows the state in which the repair valve and the storage case were attached to the communicating pipe. 新たな空気弁が取り付けられた状態を示す正面図である。It is a front view which shows the state in which the new air valve was attached.

本発明に係る管接続部材の脱着装置を実施するための形態を実施例に基づいて以下に説明する。 EMBODIMENT OF THE INVENTION The form for implementing the desorption apparatus of the pipe connection member which concerns on this invention is demonstrated below based on an Example.

実施例に係る管接続部材の脱着装置につき、図１から図１５を参照して説明する。図１に示すように、本実施例の流体管１は、例えば、地中に埋設される上水道用のダクタイル鋳鉄製であり、断面視略円形状に形成され、内周面がモルタル層で被覆されている。尚、本発明に係る流体管は、その他鋳鉄、鋼等の金属製、あるいは石綿、コンクリート製、塩化ビニール、ポリエチレン若しくはポリオレフィン製等であってもよい。更に尚、流体管の内周面はモルタル層に限らず、例えばエポキシ樹脂等により被覆されてもよく、若しくは適宜の材料を粉体塗装により流体管の内周面に被覆してもよい。また、本実施例では流体管内の流体は上水であるが、本実施例の上水に限らず、例えば工業用水や農業用水、下水等の他、ガスやガスと液体との気液混合体であっても構わない。 An apparatus for attaching and detaching a pipe connecting member according to an embodiment will be described with reference to FIGS. As shown in FIG. 1, the fluid pipe 1 of the present embodiment is made of, for example, ductile cast iron for waterworks buried in the ground, is formed in a substantially circular shape in cross section, and the inner peripheral surface is covered with a mortar layer Has been. The fluid pipe according to the present invention may be made of other metals such as cast iron and steel, or made of asbestos, concrete, vinyl chloride, polyethylene, or polyolefin. Furthermore, the inner peripheral surface of the fluid pipe is not limited to the mortar layer, and may be coated with, for example, an epoxy resin or the like, or an appropriate material may be coated on the inner peripheral surface of the fluid pipe with powder coating. In this embodiment, the fluid in the fluid pipe is clean water, but is not limited to clean water in this embodiment. For example, in addition to industrial water, agricultural water, sewage, etc., gas or gas-liquid mixture of gas and liquid It does not matter.

また、流体管１には、流体管１に連通する連通管２が接続されて分岐部が設けられている。そして、この連通管２には、本発明に係る管接続部材としてのフランジ短管４及び空気弁６がそれぞれ一対のフランジ３、５を介して接続されている。また、それぞれのフランジ３、５は、複数（本実施例では４つ）の挿通孔７を有しており、これらの挿通孔７を用いて既設ボルト・ナット８によって締結されている。尚、この空気弁６は、流体管１内の空気を抜くためまたは空気を導入するために利用される。 The fluid pipe 1 is connected to a communication pipe 2 that communicates with the fluid pipe 1 and is provided with a branch portion. The communication pipe 2 is connected with a short flange pipe 4 and an air valve 6 as a pipe connecting member according to the present invention via a pair of flanges 3 and 5, respectively. Each of the flanges 3 and 5 has a plurality of (four in this embodiment) insertion holes 7, and is fastened by existing bolts and nuts 8 using these insertion holes 7. The air valve 6 is used for extracting air from the fluid pipe 1 or introducing air.

次に、本発明に係る管接続部材の脱着装置９について図２から図３に基づいて説明する。脱着装置９は、管接続部材のフランジ３に密封状に取り付けられる取付部１０と、弁体１１が収納される弁収容部１２からなる。 Next, the desorbing device 9 for the pipe connecting member according to the present invention will be described with reference to FIGS. The detaching device 9 includes an attachment portion 10 that is attached to the flange 3 of the pipe connecting member in a sealing manner, and a valve accommodating portion 12 in which the valve body 11 is accommodated.

取付部１０は、図２に示すように、弁収容部１２に連設されフランジ３の外径より若干大きい内径の円弧状をなす第１円弧状部材１３と、フランジ３の外径より若干大きい内径の円弧状をなす第２円弧状部材１４と、後述するようにフランジ３の対向面間に挿入されてフランジ３間に間隙を形成する間隙形成手段１６を有するとともに、フランジ３の外径より若干大きい内径の円弧状をなす第３円弧状部材１５とから成る。これら第１円弧状部材１３、第２円弧状部材１４及び第３円弧状部材１５により本発明に係る取付部材を構成する。また、それぞれの円弧状部材１３、１４、１５の周方向の両端部には、後述するように各円弧状部材１３、１４、１５同士を組付ボルト・ナット１７で組み付けるための掛止部１８が設けられている。 As shown in FIG. 2, the mounting portion 10 is connected to the valve housing portion 12 and has a first arcuate member 13 having an arc shape with an inner diameter slightly larger than the outer diameter of the flange 3, and a slightly larger outer diameter than the flange 3. A second arcuate member 14 having an arcuate inner diameter and gap forming means 16 for forming a gap between the flanges 3 inserted between opposing surfaces of the flange 3 as will be described later. And a third arcuate member 15 having a slightly larger inner diameter arcuate shape. The first arcuate member 13, the second arcuate member 14 and the third arcuate member 15 constitute an attachment member according to the present invention. Further, at both ends in the circumferential direction of the respective arc-shaped members 13, 14, 15, latching portions 18 for assembling the respective arc-shaped members 13, 14, 15 with assembly bolts / nuts 17 as will be described later. Is provided.

また、第１円弧状部材１３は、フランジ３の外周の略半周を覆い、第２円弧状部材１４及び第３円弧状部材１５は、フランジ３の外周の残りを略等分して覆うように、取付部１０が３分割されている。なお、取付部１０は、さらに複数に分割されて４つ以上とされてもよく、均等に分割されても不均等に分割されても構わない。 Further, the first arcuate member 13 covers substantially the half circumference of the outer periphery of the flange 3, and the second arcuate member 14 and the third arcuate member 15 cover the remainder of the outer periphery of the flange 3 in an approximately equal manner. The mounting portion 10 is divided into three parts. The attachment portion 10 may be further divided into a plurality of four or more, and may be divided equally or unevenly.

また、各円弧状部材１３、１４、１５には、それらの下方から円弧の中心方向に略水平に延びる、フランジ３ｂの下面に向けて延設された鍔部１９が形成されており、これらの鍔部１９には、規制ボルト２０が夫々螺合されるボルト孔２１が設けられている。また、各円弧状部材１３、１４、１５の内周壁の上下方向の中央部には、各円弧状部材１３、１４、１５の内径方向に向かって膨出する膨出部２２が形成されている。そして、各円弧状部材１３、１４、１５が組付ボルト・ナット１７によりフランジ３にその外側から取り付けられた後に、規制ボルト２０が、フランジ３ｂに向かってねじ込まれることで、規制ボルト２０の上端面と膨出部２２の下面とにより、フランジ３ｂが挟持されて、各円弧状部材１３、１４、１５がフランジ３ｂに取り付けられることで、取付部１０がフランジ３ｂに対して固定されるようになっている。 In addition, each arc-shaped member 13, 14, 15 is formed with a flange portion 19 extending from the lower side thereof toward the lower surface of the flange 3b extending substantially horizontally in the center direction of the arc. The flange portion 19 is provided with a bolt hole 21 into which the regulation bolt 20 is screwed. In addition, a bulging portion 22 that bulges toward the inner diameter direction of each arc-shaped member 13, 14, 15 is formed at the center in the vertical direction of the inner peripheral wall of each arc-shaped member 13, 14, 15. . Then, after each arcuate member 13, 14, 15 is attached to the flange 3 from the outside by the assembly bolt and nut 17, the restriction bolt 20 is screwed toward the flange 3b, so that The flange 3b is sandwiched between the end surface and the lower surface of the bulging portion 22, and the respective arcuate members 13, 14, 15 are attached to the flange 3b, so that the attachment portion 10 is fixed to the flange 3b. It has become.

また、各円弧状部材１３、１４、１５の内壁部の上部及び下部には、該内壁部に亘って形成された夫々の嵌合溝２３に嵌合する弾性材から成りフランジの外周面に当接される第１密封部材２４および第２密封部材２５がそれぞれ配設される。この上部側の第２密封部材２５の内壁は、図４（ａ）に示すように、フランジ３ａ、３ｂの対向面間から離れるほど内径が漸次大となるように傾斜された傾斜面部２６と、この傾斜面部２６の傾斜角に比べて更に大きく傾斜されたテーパ面に形成されたテーパ面部２７とを有している。一方、下部側の第１密封部材２４の内壁は、フランジ３ｂの外周面にほぼ平行に当接されうる平行面部のみから成る。 Further, the upper and lower portions of the inner wall portions of the respective arc-shaped members 13, 14, and 15 are made of an elastic material that fits into respective fitting grooves 23 formed over the inner wall portions and contact the outer peripheral surface of the flange. A first sealing member 24 and a second sealing member 25 that are in contact with each other are disposed. As shown in FIG. 4A, the inner wall of the second sealing member 25 on the upper side has an inclined surface portion 26 that is inclined so that the inner diameter gradually increases as the distance from the opposing surfaces of the flanges 3a and 3b increases. It has a tapered surface portion 27 formed on a tapered surface that is inclined more largely than the inclination angle of the inclined surface portion 26. On the other hand, the inner wall of the first sealing member 24 on the lower side is composed of only a parallel surface portion that can be brought into substantially parallel contact with the outer peripheral surface of the flange 3b.

また、図２及び図３に示すように、各円弧状部材１３、１４、１５の周方向の端面には、弾性体から成る接合部パッキン５８が設けられており、各円弧状部材１３、１４、１５同士が組付ボルト・ナット１７で組み付けられた際に、流体管１内の流体の外部への漏洩が防止される。 Further, as shown in FIGS. 2 and 3, a joint packing 58 made of an elastic body is provided on the circumferential end face of each arcuate member 13, 14, 15, and each arcuate member 13, 14. , 15 are assembled with the assembly bolts and nuts 17 to prevent leakage of fluid in the fluid pipe 1 to the outside.

更に、第１円弧状部材１３は、その外周壁面に、弁体１１を収納する弁収容部１２が連設されている。また、図３に示すように、第１円弧状部材１３の中央部には、外周側から内周側に連通され、弁体１１が通過可能な横長のスリット状の挿入孔２８が設けられている。 Further, the first arcuate member 13 is provided with a valve accommodating portion 12 for accommodating the valve element 11 on the outer peripheral wall surface thereof. Further, as shown in FIG. 3, a laterally long slit-like insertion hole 28 that is communicated from the outer peripheral side to the inner peripheral side and through which the valve body 11 can pass is provided at the central portion of the first arcuate member 13. Yes.

また、第３円弧状部材１５は、その内壁面に、図２および図３に示すように、第３円弧状部材１５の外径側から内径側に延設された間隙形成片２９が設けられており、間隙形成片２９の先端部は、連結されている上方側のフランジ３ａと下方側のフランジ３ｂとの対向面間に挿通可能なように比較的薄い肉厚に形成されている。また、間隙形成片２９は、第３円弧状部材１５内に設けられた支持棒（図示略）に枢支されている。更に、間隙形成片２９の外径側端部の上方には挿通孔が穿設されており、この挿通孔には操作ボルト３０が螺挿されており、この操作ボルト３０が下方へ螺挿されることで、間隙形成片２９の外径側端部を上方から押圧するようになっている。 Further, as shown in FIGS. 2 and 3, the third arcuate member 15 is provided with a gap forming piece 29 extending from the outer diameter side to the inner diameter side of the third arcuate member 15 on the inner wall surface thereof. The tip of the gap forming piece 29 is formed to be relatively thin so that it can be inserted between the opposed surfaces of the upper flange 3a and the lower flange 3b connected to each other. The gap forming piece 29 is pivotally supported by a support rod (not shown) provided in the third arcuate member 15. Further, an insertion hole is formed above the outer diameter side end of the gap forming piece 29, and an operation bolt 30 is screwed into the insertion hole, and the operation bolt 30 is screwed downward. Thus, the outer diameter side end of the gap forming piece 29 is pressed from above.

そして、これらの間隙形成片２９と操作ボルト３０と支持棒とにより間隙形成手段１６が構成されており、間隙形成片２９の先端部がフランジ３ａ、３ｂの対向面間に挿入されたのちに、操作ボルト３０により間隙形成片２９の外径側端部が下方に押圧されることで、支持棒を支点として梃子の原理で、間隙形成片２９の内径側端部が上方に回動可能となっている。 The gap forming piece 29, the operation bolt 30 and the support rod constitute the gap forming means 16, and after the tip of the gap forming piece 29 is inserted between the opposing surfaces of the flanges 3a and 3b, When the outer diameter side end of the gap forming piece 29 is pressed downward by the operation bolt 30, the inner diameter side end of the gap forming piece 29 can be rotated upward by the lever principle with the support rod as a fulcrum. ing.

弁収容部１２は、図２に示すように、第１円弧状部材１３の外壁から連設された略方形の筒状をなしており、末端部は、弁体１１を弁収容部１２内に配置するための開口部５７を有する。この開口部５７は、弁体１１が弁収容部１２内に配置されたのちに、略方形の板状の封止板３１により密封されている。また、この封止板の中央部には、弁収容部１２の内部から外部に貫通された貫通孔３２が設けられており、貫通孔３２には、後述する弁体１１の操作杆３３がパッキンを介して密封状に挿通されている。 As shown in FIG. 2, the valve housing portion 12 has a substantially square cylindrical shape continuously provided from the outer wall of the first arcuate member 13, and the end portion has the valve body 11 in the valve housing portion 12. It has an opening 57 for placement. The opening 57 is sealed by a substantially square plate-shaped sealing plate 31 after the valve body 11 is disposed in the valve accommodating portion 12. In addition, a through hole 32 penetrating from the inside of the valve accommodating portion 12 to the outside is provided in the central portion of the sealing plate, and an operation rod 33 of the valve body 11 described later is packed in the through hole 32. It is inserted in a sealed manner through.

なお、弁収容部１２の筒状の本体の上面には、弁収容部１２内から水や空気などの流体を抜いたり導入したりする排出弁３４が設けられている。 A discharge valve 34 is provided on the upper surface of the cylindrical main body of the valve housing part 12 for extracting or introducing a fluid such as water or air from the valve housing part 12.

そして、図３に示すように、弁収容部１２の内部には弁体１１が配置されており、操作杆３３を紙面左右方向に進退移動させることで、弁体１１が弁収容部１２と取付部１０とを移動可能になっている。 As shown in FIG. 3, the valve body 11 is arranged inside the valve housing portion 12, and the valve body 11 is attached to the valve housing portion 12 by moving the operating rod 33 forward and backward in the horizontal direction of the paper. The part 10 can be moved.

次に、本発明に係る弁体１１について図５に基づいて説明する。以下、弁体１１の挿入及び抜出の方向を弁体１１の前後方向として説明する。弁体１１は、図５に示すように、上面視で、前方に向けて凸状をなす略弧状に形成された先端部３５と、略長方形をなす板状の板状部３６と、弁体１１を前後方向に移動操作する操作杆３３が接続される後端部中央の接続部３７とからなる。 Next, the valve body 11 according to the present invention will be described with reference to FIG. Hereinafter, the direction of insertion and extraction of the valve body 11 will be described as the front-rear direction of the valve body 11. As shown in FIG. 5, the valve body 11 includes, as viewed from above, a tip portion 35 formed in a substantially arc shape that protrudes forward, a plate-like plate-like portion 36 that has a substantially rectangular shape, and a valve body. 11 includes a connecting portion 37 at the center of the rear end portion to which an operating rod 33 for moving the head 11 in the front-rear direction is connected.

弁体１１の先端部３５は、その厚みが断面視で、先端側が後端側に比べて漸次小となるように形成されており、後述するようにフランジ３ａ、３ｂの対向面間に弁体１１を挿入する際に、フランジ３の座面５９に固着したガスケット３８を剥離させやすくなっている（図８参照）。 The front end portion 35 of the valve body 11 is formed so that the thickness thereof is a sectional view and the front end side is gradually smaller than the rear end side, and the valve body is disposed between the opposing surfaces of the flanges 3a and 3b as will be described later. When inserting 11, the gasket 38 fixed to the seating surface 59 of the flange 3 is easily peeled off (see FIG. 8).

また、板状部３６は、先端部３５から連続して金属製の板材により形成されて、略方形の薄い板状をなしており、その下面側には弾性体からなる弁体シート部材３９が設けられている。そして、弁体シート部材３９は板状部３６の両側方に延設されており、上面視で、先端側から中央部にかけて漸次幅が広がるとともに、中央部から後端側にかけて漸次幅が狭まる略円弧状をなす可変部４０を備えている。さらに、この可変部４０は、その弁体１１左右方向の幅は、後述するようにフランジ３の座面５９が覆われるのに十分な幅となっている。また、本実施例では、自然状態において、可撓部４０を含む弁体１１の最大幅が、フランジ３において隣接する作業用ボルト・ナット４７、４７の離間間隔よりも大きくなるように形成されている。 Further, the plate-like portion 36 is formed of a metal plate material continuously from the tip portion 35 and has a substantially rectangular thin plate shape, and a valve body sheet member 39 made of an elastic body is formed on the lower surface side thereof. Is provided. The valve body sheet member 39 is extended on both sides of the plate-like portion 36, and in a top view, the width gradually increases from the front end side to the center portion, and gradually decreases from the center portion to the rear end side. A variable portion 40 having an arc shape is provided. Further, the width of the variable portion 40 in the left-right direction of the valve body 11 is sufficient to cover the seating surface 59 of the flange 3 as will be described later. Further, in this embodiment, in the natural state, the maximum width of the valve body 11 including the flexible portion 40 is formed so as to be larger than the spacing between adjacent working bolts and nuts 47, 47 in the flange 3. Yes.

また、可変部４０は、流体管１内の流体を遮断可能な高い遮断性を有するとともに、変形後に所定の形状に復元可能な高い弾性を有するゴム材からなる。なお、可変部４０は、流体の遮断性および弾性が十分に高い材質であれば、ゴム材以外から構成されてもよい。 The variable portion 40 is made of a rubber material having a high barrier property that can shut off the fluid in the fluid pipe 1 and having a high elasticity that can be restored to a predetermined shape after deformation. The variable portion 40 may be made of a material other than a rubber material as long as it has a sufficiently high fluid barrier property and elasticity.

また、可変部４０は、外周面に沿って延設され板状部３６よりも上方に僅かに突出された突出部４１が設けられている。この突出部４１は、後述するように弁体１１がフランジ３ａ、３ｂの対向面間に挿入された際に、フランジ３の座面５９に圧着される圧着用のつぶし代として機能するように、突出部４１の上下方向の厚みは弾性体の弾性係数によって所定厚さに形成される。 The variable portion 40 is provided with a protruding portion 41 that extends along the outer peripheral surface and slightly protrudes above the plate-like portion 36. As will be described later, the protruding portion 41 functions as a crimping allowance for crimping that is crimped to the seating surface 59 of the flange 3 when the valve body 11 is inserted between the opposing surfaces of the flanges 3a and 3b. The thickness of the protrusion 41 in the vertical direction is formed to a predetermined thickness by the elastic coefficient of the elastic body.

さらに、可変部４０は、突出部４１のよりも内側に、可変部４０の外形に沿って、弁体１１の挿入方向に延設された溝状の溝部４２を備えている。この溝部４２は、後述するように弁体１１がフランジ３ａ、３ｂの対向面間に挿入される際に、ボルト等に接触して可変部４０が変形する場合に、圧縮された可変部４０の一部が逃げるための逃げ空間として機能するように、突出部４１の厚みや弾性体の弾性係数によって所定幅に形成される。これにより、可変部４０のフランジ３ｂの座面に対する追従性や密封性が向上される。 Further, the variable portion 40 includes a groove-like groove portion 42 extending in the insertion direction of the valve body 11 along the outer shape of the variable portion 40 on the inner side of the protruding portion 41. As will be described later, when the valve body 11 is inserted between the opposing surfaces of the flanges 3a and 3b, the groove portion 42 is formed in the compressed variable portion 40 when the variable portion 40 is deformed by contact with a bolt or the like. It is formed in a predetermined width depending on the thickness of the protrusion 41 and the elastic coefficient of the elastic body so that a part functions as a relief space for escape. Thereby, the followable | trackability with respect to the seat surface of the flange 3b of the variable part 40 and sealing performance are improved.

そして、図３及び図５に示すように、弁体１１の接続部３７は、断面視略コ字形状の接続部材４３からなり、接続部材４３の左右側には、上下方向に貫通する貫通孔４３ａが設けられている。さらに、弁体１１の後端部には、貫通孔４３ａに連通する比較的大径の挿通孔（図示略）が形成されており、これら貫通孔４３ａ及び前記挿通孔に、該挿通孔よりも小径のスプリングピン４５が挿入されていることで、弁体１１が接続部材４３に対し、上下方向に遊嵌状態で接続されている。また、上面側および下面側の接続部材４３の後方側の中央部には貫通孔が設けられており、この貫通孔に六角穴付き止めネジ４４が挿入されて、接続部材４３に操作杆３３が固定されている。また、操作杆３３は、弁体１１の挿入方向に延設されており、操作杆３３の端部には、操作者により把持される把持部４６が設けられている。 As shown in FIGS. 3 and 5, the connection portion 37 of the valve body 11 is composed of a connection member 43 having a substantially U-shaped cross-sectional view. 43a is provided. Further, a relatively large-diameter insertion hole (not shown) communicating with the through-hole 43a is formed at the rear end portion of the valve body 11, and the through-hole 43a and the insertion hole are more than the insertion hole. Since the small-diameter spring pin 45 is inserted, the valve body 11 is connected to the connection member 43 in a loosely fitted state in the vertical direction. In addition, a through hole is provided in the central portion on the rear side of the connection member 43 on the upper surface side and the lower surface side. A hexagon socket set screw 44 is inserted into the through hole, and the operation rod 33 is provided on the connection member 43. It is fixed. Further, the operating rod 33 extends in the insertion direction of the valve body 11, and a grip portion 46 that is gripped by the operator is provided at the end of the operating rod 33.

次に、脱着装置９を用いて、流体管１の管路を上流側で遮断することなく管路内の流体の流れを維持したままの状態（不断流状態）で、管接続部材の脱着を行う脱着工程について、図１、図６乃至図１５に基づいて説明する。 Next, using the desorption device 9, the pipe connection member is detached in the state in which the flow of the fluid in the pipe is maintained without being interrupted on the upstream side (discontinuous flow state). The desorption process to be performed will be described with reference to FIGS. 1 and 6 to 15.

まず、図１に示すように、既設ボルト・ナット８で接続されている連通管２のフランジ３ｂ、及びフランジ短管４のフランジ３ａを清掃し、フランジ３ａ、３ｂの状態を確認する。フランジ３にパッキン等による密封性に影響をもたらすような凹凸等があれば補修を行う。また、フランジ３ａ、３ｂの対向面間に挟まれているガスケットをフランジ３ｂ側から剥離させて、その剥離片をフランジ３ａ側に退避させる。 First, as shown in FIG. 1, the flange 3b of the communication pipe 2 and the flange 3a of the flange short pipe 4 connected by existing bolts and nuts 8 are cleaned, and the states of the flanges 3a and 3b are confirmed. If there are irregularities or the like on the flange 3 that affect the sealing performance by packing or the like, repair is performed. Further, the gasket sandwiched between the facing surfaces of the flanges 3a and 3b is peeled off from the flange 3b side, and the peeled piece is retracted to the flange 3a side.

そして、既設ボルト・ナット８を、挿通孔７から流体が漏洩するのを防止する漏洩防止機能を有する作業用ボルト・ナット４７に１本ずつ交換する。この作業用ボルト・ナット４７のうち、少なくとも第１円弧状部材１３が取り付けられる側、すなわち弁体の挿入側における２本の作業用ボルト・ナット４７の外周には、図６に示すように、筒状のポリ四フッ化エチレン製の筒状体５６が、後述する弁体１１のガイド部４８として機能するように作業用ボルト４７の周方向および軸方向に摺動可能に取り付けられている。なお、この筒状体５６は、ポリ四フッ化エチレン以外の摺動性の良好なプラスチック材、例えば、フッ素化プラスチック、そしてポリアセタール、ナイロン、高分子量高密度ポリエチレンなどからなってもよい。更になお、筒状体の縦方向に渡ってスリット状の切欠部を形成し、すなわち当該筒状体を平面視略Ｃ字状に形成することで、ボルトに対し遊嵌状態を創出して摺動性を高めるとともに、当該筒状体を複数種の径のボルトに取り付け可能として汎用性を持たせることができる。 Then, the existing bolts and nuts 8 are replaced one by one with working bolts and nuts 47 having a leakage preventing function for preventing fluid from leaking from the insertion holes 7. Among the working bolts and nuts 47, on the outer periphery of the two working bolts and nuts 47 on the side where at least the first arcuate member 13 is attached, that is, on the valve element insertion side, as shown in FIG. A cylindrical tubular body 56 made of polytetrafluoroethylene is attached so as to be slidable in the circumferential direction and the axial direction of the working bolt 47 so as to function as a guide portion 48 of the valve body 11 described later. The cylindrical body 56 may be made of a plastic material having good slidability other than polytetrafluoroethylene, such as fluorinated plastic, polyacetal, nylon, high molecular weight high density polyethylene, and the like. Furthermore, a slit-like notch is formed in the longitudinal direction of the cylindrical body, that is, the cylindrical body is formed in a substantially C shape in a plan view, thereby creating a loosely fitted state with respect to the bolt. In addition to enhancing the mobility, the cylindrical body can be attached to bolts of a plurality of types of diameters so that versatility can be provided.

次に、本発明に係る脱着装置９の取付部１０を、嵌合溝２３に第１密封部材２４及び第２密封部材２５を嵌合させた各円弧状部材１３、１４、１５の掛止部１８にそれぞれ組付ボルト・ナット１７を挿入して、仮組み状態にする。また、各円弧状部材１３、１４、１５の膨出部２２及び間隙形成片２９を、フランジ３の外周方向からフランジ３ａ、３ｂの対向面間に挿入して、フランジ３ｂの上面に当接させるとともに、鍔部１９をフランジ３ｂの下面に配置させるようにして、各円弧状部材１３、１４、１５をフランジ３ｂに仮固定する。 Next, the attaching portion 10 of the detaching apparatus 9 according to the present invention is a latching portion of each arcuate member 13, 14, 15 in which the first sealing member 24 and the second sealing member 25 are fitted in the fitting groove 23. The assembly bolts and nuts 17 are inserted into the respective parts 18 to be temporarily assembled. Further, the bulging portions 22 and the gap forming pieces 29 of the respective arc-shaped members 13, 14, 15 are inserted between the opposing surfaces of the flanges 3 a, 3 b from the outer peripheral direction of the flange 3 and are brought into contact with the upper surface of the flange 3 b. At the same time, the arcuate members 13, 14, and 15 are temporarily fixed to the flange 3b so that the flange portion 19 is disposed on the lower surface of the flange 3b.

そして、各組付ボルト・ナット１７を締め付けて、第１密封部材２４及び第２密封部材２５をフランジ３の外周面に密着させる。このとき、脱着装置９の取付部１０が３分割されているので、各組付ボルト・ナット１７を締め付けると、各密封部材２４、２５が少なくとも３方向から押圧されることになる。これにより、各密封部材２４、２５を密着させる力が３方向に分散されるので、第１及び第２密封部材２４、２５は、周方向に均等に押圧されてフランジ３に密着される。 Then, each assembled bolt / nut 17 is tightened to bring the first sealing member 24 and the second sealing member 25 into close contact with the outer peripheral surface of the flange 3. At this time, since the attaching portion 10 of the detaching device 9 is divided into three parts, when the respective assembly bolts and nuts 17 are tightened, the respective sealing members 24 and 25 are pressed from at least three directions. As a result, the force for bringing the sealing members 24 and 25 into close contact with each other is distributed in three directions, so that the first and second sealing members 24 and 25 are pressed evenly in the circumferential direction and are in close contact with the flange 3.

また、鍔部１９のボルト孔２１に規制ボルト２０をその上端面がフランジ３ｂの下面に当接するようにねじ込み、規制ボルト２０と膨出部２２とでフランジ３ｂを上下方向から挟み込むことで、脱着装置９をフランジ３ｂに固定する（図７参照）。そして、脱着装置の弁体挿入側に、上述のガイド部４８を有する２本の作業用ボルト・ナット４７が位置するように、脱着装置のフランジ３に対する周方向位置を調整する。ここで、三分割された取付部材としての各円弧状部材１３、１４、１５が、それぞれ膨出部２２を備えることで、各円弧状部材１３、１４、１５をフランジ３ｂに仮固定しやすくなっており、更に、安定的に仮固定されるので脱着装置の位置調整が容易になっている。 Further, the restriction bolt 20 is screwed into the bolt hole 21 of the flange portion 19 so that the upper end surface of the restriction bolt 20 is in contact with the lower surface of the flange 3b, and the flange 3b is sandwiched between the restriction bolt 20 and the bulging portion 22 so as to be detached. The device 9 is fixed to the flange 3b (see FIG. 7). And the circumferential direction position with respect to the flange 3 of a desorption apparatus is adjusted so that the two working bolts and nuts 47 which have the above-mentioned guide part 48 may be located in the valve body insertion side of a desorption apparatus. Here, each arcuate member 13, 14, 15 as the mounting member divided into three is provided with the bulging portion 22, respectively, so that each arcuate member 13, 14, 15 is easily temporarily fixed to the flange 3b. Furthermore, since the temporary fixing is stable, the position adjustment of the detaching device is facilitated.

そして、図７及び図８に示すように、脱着装置９をフランジ３ｂに固定した後に、各作業用ボルト・ナット４７を１本ずつ順々に所定ピッチ量緩めて上方に夫々螺出させる。これにより、流体管１内の流体の圧力がフランジ３に作用して、フランジ３ａとフランジ３ｂとが作業用ボルト・ナット４７の緩められた所定ピッチ量分だけ相対的に管軸方向に移動して、後述するように弁体１１が挿入可能な間隙がフランジ３ａ、３ｂの対向面間に生じる（図８（ａ）参照）。ここで、本実施例の脱着装置９においては、図４に示すように、第１密封部材２４の内周面がフランジ３ｂの外周面に沿って形成されており、第１密封部材ではフランジ３ｂに比較的強く密着される。その一方で、第２密封部材２５の内周面がフランジ３ａ、３ｂの対向面から遠ざかるに連れて内径が漸次大となるテーパ面を有するように形成されており、第２密封部材２５ではフランジ３ａ、３ｂの対向面から遠い部位ほど、フランジ３ａに比較的弱く密着される。これにより、フランジ３ｂから離す方向にフランジ３ａを移動させやすくなっている。 Then, as shown in FIGS. 7 and 8, after the detaching device 9 is fixed to the flange 3b, the working bolts and nuts 47 are loosened one by one by a predetermined pitch one by one and screwed upward. As a result, the pressure of the fluid in the fluid pipe 1 acts on the flange 3, and the flange 3 a and the flange 3 b move relatively in the pipe axis direction by a predetermined pitch amount by which the working bolts and nuts 47 are loosened. Thus, as will be described later, a gap into which the valve element 11 can be inserted is formed between the opposing surfaces of the flanges 3a and 3b (see FIG. 8A). Here, in the detaching apparatus 9 of the present embodiment, as shown in FIG. 4, the inner peripheral surface of the first sealing member 24 is formed along the outer peripheral surface of the flange 3b, and in the first sealing member, the flange 3b is formed. Is relatively strongly adhered to. On the other hand, the inner surface of the second sealing member 25 is formed to have a tapered surface whose inner diameter gradually increases as the distance from the opposing surface of the flanges 3a and 3b increases. The farther from the facing surfaces of 3a and 3b, the closer to the flange 3a is relatively weakly adhered. Thereby, it becomes easy to move the flange 3a in the direction away from the flange 3b.

ここで、上述のように取付部１０が３分割された各円弧状部材１３、１４、１５からなり、第２密封部材２５が少なくとも３方向から均等にフランジ３ａの外周面に密接しているので、フランジ３ａの一部で他の部位よりも大きな摩擦力が生じることが防止されて、フランジ３ａとフランジ３ｂとが相対的に管軸方向に移動されやすくなっている。これにより、フランジ３ａ、３ｂの対向面間に間隙が形成されなかったり、フランジ３ｂがフランジ３ａに対して傾いて移動されたりすることが防止され、作業効率が向上する。 Here, as described above, the mounting portion 10 includes the respective arc-shaped members 13, 14, 15 divided into three parts, and the second sealing member 25 is in close contact with the outer peripheral surface of the flange 3 a evenly from at least three directions. A part of the flange 3a is prevented from generating a larger frictional force than other parts, and the flange 3a and the flange 3b are relatively easily moved in the tube axis direction. This prevents a gap from being formed between the opposing surfaces of the flanges 3a and 3b and prevents the flange 3b from being inclined and moved with respect to the flange 3a, thereby improving work efficiency.

なお、フランジ３ａ、３ｂの対向面間の間隙形成が不十分であった場合には、間隙形成手段１６の操作ボルト３０を下方に螺入させることで、間隙形成片２９をフランジ３ａに作用させて間隙の形成を促すことができる。尚、間隙形成手段１６は、操作ボルト３０が下方に螺入されると、間隙形成片２９の外径側端部を力点として梃子の原理によって、間隙形成片２９の内径側端部がフランジ３ａの下面に当接されてフランジ３ａに上向きの力を働かせる。この上向きの力により、フランジ３ａが連通管２の管軸方向に移動されて、フランジ３ａ、３ｂの対向面間に弁体１１を挿入可能な間隙が形成される。 In addition, when the gap formation between the opposing surfaces of the flanges 3a and 3b is insufficient, the gap forming piece 29 is caused to act on the flange 3a by screwing the operation bolt 30 of the gap forming means 16 downward. This can promote the formation of a gap. When the operating bolt 30 is screwed downward, the gap forming means 16 has an inner diameter side end portion of the gap forming piece 29 at the flange 3a by the lever principle with the outer diameter side end portion of the gap forming piece 29 as a power point. An upper force is applied to the flange 3a. By this upward force, the flange 3a is moved in the tube axis direction of the communication pipe 2, and a gap in which the valve body 11 can be inserted is formed between the opposing surfaces of the flanges 3a and 3b.

次いで、図８に示すように、弁体１１の操作杆３３を押し込み、弁体１１をフランジ３の中心方向に移動させて、フランジ３ａとフランジ３ｂとの間隙に弁体１１を挿入する。ここで、弁体１１の先端が、上面視で前方に凸状をなす略弧状であり、断面視で先端側が後端側に比べて漸次小となるように形成されているので、フランジ３弁体１１の先端をフランジ３のガスケット３８の下方側に容易に挿入することができるとともに、ガスケット３８がフランジ３の座に固着されていても容易にガスケット３８を剥離させながら弁体１１を挿入することができる。 Next, as shown in FIG. 8, the operating rod 33 of the valve body 11 is pushed in, the valve body 11 is moved in the center direction of the flange 3, and the valve body 11 is inserted into the gap between the flange 3a and the flange 3b. Here, the front end of the valve body 11 has a substantially arc shape that protrudes forward in a top view and is formed so that the front end side becomes gradually smaller than the rear end side in a cross-sectional view. The tip of the body 11 can be easily inserted below the gasket 38 of the flange 3, and the valve body 11 can be inserted while the gasket 38 is peeled off easily even if the gasket 38 is fixed to the seat of the flange 3. be able to.

また、図８（ａ）の拡大図に示すように、弁収容部１２の挿入孔２８の下面とフランジ３ｂの上面とが段差を生じないように合わせられているとともに、弁体１１下面の傾斜により弁体１１がフランジ３ｂの座面５９上方に導かれるようになっているので、弁体１１の先端がフランジ３の座の外縁に接触しても、先端が座に引っ掛かることなく、弁体１１をフランジ３ａ、３ｂの対向面間に容易且つ円滑に挿入させることができる。さらに上記したように、弁体１１が接続部材４３に対し、スプリングピン４５を介し上下方向に遊嵌状態で接続されていることで、弁体１１が上下方向に移動し易く、フランジ３ａ、３ｂの対向面間に挿入可能となっている。 Further, as shown in the enlarged view of FIG. 8A, the lower surface of the insertion hole 28 of the valve housing portion 12 and the upper surface of the flange 3b are aligned so as not to cause a step, and the lower surface of the valve body 11 is inclined. Since the valve body 11 is guided above the seating surface 59 of the flange 3b, even if the tip of the valve body 11 contacts the outer edge of the seat of the flange 3, the tip of the valve body 11 is not caught on the seat. 11 can be easily and smoothly inserted between the opposing surfaces of the flanges 3a and 3b. Further, as described above, since the valve body 11 is connected to the connection member 43 in a loosely fitted state in the vertical direction via the spring pin 45, the valve body 11 is easily moved in the vertical direction, and the flanges 3a and 3b. It can be inserted between the opposing surfaces.

そして、図９に示すように、弁体１１の操作杆３３を更に押し込み、弁体１１をフランジ３の中心方向に更に移動させる。ここで、フランジ３を接続する作業用ボルト４７同士の間を弁体１１が通過される際には、弁体１１の可変部４０は、図９（ｂ）に示すように、作業用ボルト４７に接触される。そして、可変部４０が弾性体からなるとともに上面視で略円弧状をなしているので、可変部４０が作業用ボルト４７に接触されると、接触部位を作用点として、弁体１１挿入方向と逆の方向や略円弧状の可変部４０の中心方向に向けて、可変部４０が作用点から漸次弾性変形されることになり、弁体１１はその横幅より狭い作業用ボルト４７同士の間を通過可能になっている。 Then, as shown in FIG. 9, the operating rod 33 of the valve body 11 is further pushed in, and the valve body 11 is further moved toward the center of the flange 3. Here, when the valve body 11 is passed between the working bolts 47 connecting the flange 3, the variable portion 40 of the valve body 11 has the working bolt 47 as shown in FIG. 9B. Touched. Since the variable portion 40 is made of an elastic body and has a substantially arc shape when viewed from above, when the variable portion 40 is brought into contact with the work bolt 47, the contact portion serves as an action point and the insertion direction of the valve body 11 The variable portion 40 is gradually elastically deformed from the point of action toward the opposite direction or the central direction of the substantially arc-shaped variable portion 40, and the valve body 11 is interposed between the working bolts 47 narrower than its lateral width. It is possible to pass.

また、可変部４０は、溝部４２が設けられていることで、可変部４０が変形する場合に、圧縮された可変部４０の一部が逃げるための逃げ空間が確保されている。なおかつ、可変部４０において溝部４２が形成された部分は、肉厚が薄く撓みやすくなっており、可変部４０が略円弧状の中心方向に向けて変形しやすくなっている。これにより、可変部４０の変形に対する追従性や密封性が高められているので、弁体１１を作業用ボルト４７同士間に更に円滑に挿入することができる。なお、可変部４０が略円弧状をなしているので、後述するように弁体１１を弁収容部１２に引き戻す場合においては、弁体１１を作業用ボルト４７同士間から円滑に抜き出すことができる。 Further, since the variable portion 40 is provided with the groove portion 42, when the variable portion 40 is deformed, a clearance space is secured for part of the compressed variable portion 40 to escape. In addition, the portion where the groove portion 42 is formed in the variable portion 40 is thin and easy to bend, and the variable portion 40 is easily deformed toward the central direction of the substantially arc shape. Thereby, since the followability with respect to a deformation | transformation of the variable part 40 and sealing performance are improved, the valve body 11 can be inserted further smoothly between the volt | bolts 47 for work. Since the variable portion 40 has a substantially arc shape, the valve body 11 can be smoothly extracted from between the working bolts 47 when the valve body 11 is pulled back to the valve housing portion 12 as will be described later. .

また、弁体１１に接触される作業用ボルト４７の外周面には、筒状体５６からなるガイド部４８が設けられ、弁体１１と作業用ボルト４７との摺動抵抗が低減されているので、弁体１１と作業用ボルト４７とが接触する場合であっても、作業用ボルト４７同士間を弁体１１が円滑に通過できる。さらに、このガイド部４８によって作業用ボルト４７のネジ山が覆われているので、弾性体からなる可変部４０が作業用ボルト４７のネジ山によって疵付けられることが防止される。 Further, a guide portion 48 made of a cylindrical body 56 is provided on the outer peripheral surface of the working bolt 47 that comes into contact with the valve body 11, and sliding resistance between the valve body 11 and the working bolt 47 is reduced. Therefore, even when the valve body 11 and the work bolt 47 are in contact, the valve body 11 can smoothly pass between the work bolts 47. Further, since the thread of the working bolt 47 is covered by the guide portion 48, the variable portion 40 made of an elastic body is prevented from being brazed by the thread of the working bolt 47.

なお、可変部４０において作業用ボルト４７に接触される部位に、低摩擦抵抗体が塗布等されて設けられてもよく、これにより、作業用ボルト４７同士間を弁体１１が更に円滑に通過できる。 Note that a low friction resistor may be applied to a portion of the variable portion 40 that is in contact with the work bolt 47 so that the valve body 11 passes between the work bolts 47 more smoothly. it can.

さらに、図１０に示すように、弁体１１の操作杆３３を更に押し込み、連通管２の管路を閉塞するための所定の流体遮断位置まで弁体１１を移動させる。ここで、弁体１１の可変部４０は、作業用ボルト４７同士間を通過する際には上述のように変形されるが、通過後には、自然状態の形状（閉塞形状）に弾性復元されて、弁体１１により連通管２の流路が塞がれるとともにフランジ３ｂの座面５９に対して十分に大きなシート面が確保される。 Further, as shown in FIG. 10, the operating rod 33 of the valve body 11 is further pushed in, and the valve body 11 is moved to a predetermined fluid blocking position for closing the conduit of the communication pipe 2. Here, the variable portion 40 of the valve body 11 is deformed as described above when passing between the working bolts 47, but after passing, it is elastically restored to a natural state shape (closed shape). The valve body 11 blocks the flow path of the communication pipe 2 and ensures a sufficiently large seat surface with respect to the seat surface 59 of the flange 3b.

次いで、作業用ボルト・ナット４７を順々に少しずつ締め付ける。なお、上述の間隙形成手段１６を使用していた場合は、操作ボルト３０を操作して間隙形成片２９を初期位置に戻した後に、作業用ボルト・ナット４７を締め付ける。これにより、弁体１１がフランジ３ａ、３ｂの対向面によって挟み込まれて、連通管２とフランジ短管４との間の流れが完全に遮断される。 Next, the working bolts and nuts 47 are tightened little by little in order. When the gap forming means 16 is used, the operation bolt 30 is operated to return the gap forming piece 29 to the initial position, and then the work bolt / nut 47 is tightened. Thereby, the valve body 11 is inserted | pinched by the opposing surface of flange 3a, 3b, and the flow between the communicating pipe 2 and the flange short pipe 4 is interrupted | blocked completely.

ここで、可変部４０には、外形に沿って上方に突出する突出部４１が形成されているので、弁体１１がフランジ３ａ、３ｂで挟み込まれると、突出部４１の上方側が下方に向けて圧縮される。これにより、突出部４１の下方側、すなわちシート面がフランジ３ｂの座面５９に対して押圧されて強固に密着される。また、可変部４０以外のシート部は、弁体１１の挿入方向に十分に大きな接触面積をもってフランジ３ｂの座面５９に密着される。したがって、本発明に係る弁体１１により、フランジ３ａ、３ｂの対向面間の流れが確実に遮断されて、流体が漏洩することが防止される。 Here, since the protrusion part 41 which protrudes upwards along the external shape is formed in the variable part 40, if the valve body 11 is inserted | pinched by the flanges 3a and 3b, the upper side of the protrusion part 41 will face downward. Compressed. As a result, the lower side of the projecting portion 41, that is, the seat surface is pressed against the seat surface 59 of the flange 3b and firmly adhered thereto. Further, the seat portions other than the variable portion 40 are in close contact with the seating surface 59 of the flange 3b with a sufficiently large contact area in the insertion direction of the valve body 11. Therefore, the valve body 11 according to the present invention reliably blocks the flow between the opposing surfaces of the flanges 3a and 3b and prevents the fluid from leaking.

また、可変部４０が弾性体からなる突出部４１を有しており、弁体１１両側のシート面とフランジ３ｂの座面５９とに対する追従性と密封性が高められているので、フランジ３ｂの座面５９に比べて可変部４０の面積が小さくても、弁体１１は流体の流れを確実に遮断することができる。 Further, the variable portion 40 has a projecting portion 41 made of an elastic body, and the followability and the sealing performance with respect to the seat surfaces on both sides of the valve body 11 and the seat surface 59 of the flange 3b are enhanced. Even if the area of the variable portion 40 is smaller than that of the seating surface 59, the valve body 11 can reliably block the flow of fluid.

続いて、図１１に示すように、フランジ短管４から空気弁６を取り外して、閉塞装置４９をフランジ短管４に取り付ける。この閉塞装置４９は、フランジ短管４に密封状に取り付けられる収容ケース５０と、収容ケース５０の内部に収容され、連通管２の分岐口５１を閉塞する閉塞部材５２と、閉塞部材５２を連通管２の分岐口５１に挿入する棒状の操作軸５３と、作業者が操作軸５３を操作するハンドル５４とから構成される。なお、これらの収容ケース５０、閉塞部材５２、ハンドル５４等については、具体的な構成および詳細な説明は省略する。 Subsequently, as shown in FIG. 11, the air valve 6 is removed from the short flange tube 4, and the closing device 49 is attached to the short flange tube 4. The closing device 49 includes a housing case 50 attached to the flange short tube 4 in a sealed manner, a closing member 52 that is housed inside the housing case 50 and closes the branch port 51 of the communication pipe 2, and communicates the closing member 52. A rod-shaped operation shaft 53 to be inserted into the branch port 51 of the tube 2 and a handle 54 for operating the operation shaft 53 by an operator. Note that a specific configuration and detailed description of the storage case 50, the closing member 52, the handle 54, and the like are omitted.

そして、脱着装置９の各作業用ボルト４７を、上述のように１本ずつ順々に所定ピッチ量緩めて上方に夫々螺出させて、フランジ３ａ、３ｂを管軸方向に相対的に移動させ、フランジ３ａ、３ｂの対向面間に間隙を生じさせる。 Then, each of the working bolts 47 of the detaching device 9 is loosened by a predetermined pitch amount one by one as described above and screwed upward to move the flanges 3a and 3b relatively in the tube axis direction. A gap is generated between the opposing surfaces of the flanges 3a and 3b.

次いで、図１２に示すように、脱着装置９の操作杆３３を引いて、弁体１１を流体遮断位置から移動させて弁収容部１２に収容する。その後、閉塞装置４９のハンドル５４を操作して、閉塞部材５２を収容ケース５０から連通管２の分岐口５１付近まで移動させて、分岐口５１を閉塞させ、流体管１と連通管２との間の流体の流れを遮断する。 Next, as shown in FIG. 12, the operating rod 33 of the detaching device 9 is pulled to move the valve body 11 from the fluid blocking position and accommodate it in the valve accommodating portion 12. Thereafter, the handle 54 of the closing device 49 is operated to move the closing member 52 from the housing case 50 to the vicinity of the branch port 51 of the communication pipe 2 to close the branch port 51, and to connect the fluid pipe 1 and the communication pipe 2. Block the fluid flow between them.

また、図１３に示すように、閉塞装置４９の閉塞具により分岐口５１を閉塞した状態で、閉塞装置４９のハンドル５４、収容ケース５０、フランジ短管４、脱着装置９を連通管２から取り外す。ここで、本実施例の脱着装置９においては、図４に示すように、第１密封部材２４の内周面がフランジ３ｂの外周面に沿って形成されており、第１密封部材ではフランジ３ｂに比較的強く密着される。その一方で、第２密封部材２５の内周面がフランジ３ａ、３ｂの対向面から遠ざかるに連れて内径が漸次大となるテーパ面を有するように形成されており、第２密封部材２５ではフランジ３ａ、３ｂの対向面から遠い部位ほど、フランジ３ａに比較的弱く密着される。 Further, as shown in FIG. 13, the handle 54, the housing case 50, the flange short tube 4, and the detaching device 9 of the closing device 49 are removed from the communication tube 2 in a state where the branch port 51 is closed by the closing tool of the closing device 49. . Here, in the detaching apparatus 9 of the present embodiment, as shown in FIG. 4, the inner peripheral surface of the first sealing member 24 is formed along the outer peripheral surface of the flange 3b, and in the first sealing member, the flange 3b is formed. Is relatively strongly adhered to. On the other hand, the inner surface of the second sealing member 25 is formed to have a tapered surface whose inner diameter gradually increases as the distance from the opposing surface of the flanges 3a and 3b increases. The farther from the facing surfaces of 3a and 3b, the closer to the flange 3a is relatively weakly adhered.

これにより、フランジ３ｂから離す方向にフランジ３ａを移動させやすくなっている。すなわち、管接続部材としてのフランジ短管４を分岐部としての連通管２から取り外しやすくなっており、熟練を要することなく管接続部材を分岐部から取り外すことができる。 Thereby, it becomes easy to move the flange 3a in the direction away from the flange 3b. That is, it is easy to remove the flange short pipe 4 as the pipe connection member from the communication pipe 2 as the branch part, and the pipe connection member can be detached from the branch part without requiring skill.

そして、図１４に示すように、連通管２のフランジ３ｂの対向面を点検、清掃、補修した後に、連通管２に新たな補修弁５５を取り付けるとともに、補修弁５５に閉塞装置４９の収容ケース５０およびハンドル５４を取り付ける。さらに、閉塞装置４９のハンドル５４を操作して、閉塞部材５２を収容ケース５０に収容する。さらにその後、図１５に示すように、補修弁５５を閉じて、閉塞装置４９を補修弁５５から取り外し、補修弁５５に新たな空気弁６’を取り付ける。 Then, as shown in FIG. 14, after inspecting, cleaning, and repairing the facing surface of the flange 3 b of the communication pipe 2, a new repair valve 55 is attached to the communication pipe 2, and the housing case of the closing device 49 is attached to the repair valve 55. 50 and handle 54 are attached. Further, the closure member 52 is accommodated in the accommodation case 50 by operating the handle 54 of the closure device 49. Then, as shown in FIG. 15, the repair valve 55 is closed, the closing device 49 is removed from the repair valve 55, and a new air valve 6 ′ is attached to the repair valve 55.

以上により、本発明に係る管接続部材の脱着装置９は、取付部材である第１円弧状部材１３、第２円弧状部材１４及び第３円弧状部材１５が、少なくとも３つ以上に分割された分割構造を有することで、既設流体管１の連通管２（分岐部）と連通管２に接続されたフランジ短管４（管接続部材）との間に介在するフランジ３が、内部に弁体１１を備えた第１円弧状部材１３、第２円弧状部材１４及び第３円弧状部材１５で密封状に外嵌される際に、第１円弧状部材１３、第２円弧状部材１４及び第３円弧状部材１５には、少なくとも三方向から締め付け力が加えられて、第１円弧状部材１３、第２円弧状部材１４及び第３円弧状部材１５がフランジ３を押圧する力が少なくとも三か所以上に分散されて作用することになる。したがって、フランジ３に加えられる押圧力がフランジ３の周方向に均一化される。これにより、フランジ３に既設流体管１内の流体の圧力を作用させた際に、フランジ３が管軸方向に円滑に移動されて、弁体１１を挿入するための十分な間隙が容易に形成されることになり、作業効率を向上させることができる。 As described above, in the pipe connecting member detaching device 9 according to the present invention, the first arcuate member 13, the second arcuate member 14, and the third arcuate member 15 as the attachment members are divided into at least three or more. By having the divided structure, the flange 3 interposed between the communication pipe 2 (branch portion) of the existing fluid pipe 1 and the flange short pipe 4 (tube connection member) connected to the communication pipe 2 is provided inside the valve body. 11, the first arcuate member 13, the second arcuate member 14, and the third arcuate member 15 are fitted in a sealed manner by the first arcuate member 13, the second arcuate member 14, and the first arcuate member 13. A tightening force is applied to the three arc-shaped members 15 from at least three directions, so that the first arc-shaped member 13, the second arc-shaped member 14, and the third arc-shaped member 15 have at least three forces to press the flange 3. It will be distributed more than the place. Therefore, the pressing force applied to the flange 3 is made uniform in the circumferential direction of the flange 3. Thereby, when the pressure of the fluid in the existing fluid pipe | tube 1 is made to act on the flange 3, the flange 3 is smoothly moved to a pipe-axis direction and sufficient gap | interval for inserting the valve body 11 is easily formed. As a result, work efficiency can be improved.

また、取付部材である第１円弧状部材１３、第２円弧状部材１４及び第３円弧状部材１５が、弁体１１を収容する弁収容部１２を有するとともにフランジ３の外周の略半周を覆う第１円弧状部材１３（第１部材）と、フランジ３の外周の残りを略等分して覆う第２円弧状部材１４及び第３円弧状部材１５（第２部材及び第３部材）からなる三分割構造を有することで、第１円弧状部材１３、第２円弧状部材１４及び第３円弧状部材１５が複数に構成されても容易に組み付けられるので、作業効率を向上することができ、尚且つ、第１円弧状部材１３がフランジ３の外周の略半周を覆う形状をなすことで、連通管２を閉塞するのに十分な横幅を有する弁体１１を収容できる弁収容部１２を設けることができる。 Further, the first arcuate member 13, the second arcuate member 14, and the third arcuate member 15, which are mounting members, have a valve accommodating portion 12 that accommodates the valve body 11 and cover a substantially half circumference of the outer periphery of the flange 3. It consists of a first arc-shaped member 13 (first member), a second arc-shaped member 14 and a third arc-shaped member 15 (second member and third member) that cover the remainder of the outer periphery of the flange 3 in an approximately equal manner. By having a three-part structure, even if the first arc-shaped member 13, the second arc-shaped member 14 and the third arc-shaped member 15 are configured in a plurality, it is possible to improve the work efficiency, In addition, the first arcuate member 13 has a shape that covers a substantially half circumference of the outer periphery of the flange 3, thereby providing a valve accommodating portion 12 that can accommodate the valve body 11 having a sufficient width to close the communication pipe 2. be able to.

また、取付部材である第１円弧状部材１３、第２円弧状部材１４及び第３円弧状部材１５が、フランジ３の内径方向に向かって膨出する膨出部２２を備えているので、第１円弧状部材１３、第２円弧状部材１４及び第３円弧状部材１５をフランジ３に外嵌させる際に、フランジ３の対向面間に第１円弧状部材１３、第２円弧状部材１４及び第３円弧状部材１５の膨出部２２を挿入することで、膨出部２２によって第１円弧状部材１３、第２円弧状部材１４及び第３円弧状部材１５がそれぞれ支持されてフランジ３に仮固定されるので、第１円弧状部材１３、第２円弧状部材１４及び第３円弧状部材１５を安定させた状態で、第１円弧状部材１３、第２円弧状部材１４及び第３円弧状部材１５のフランジ３に対する周方向位置を容易に微調整することができる。 In addition, since the first arcuate member 13, the second arcuate member 14, and the third arcuate member 15, which are attachment members, include the bulging portion 22 that bulges toward the inner diameter direction of the flange 3, When the first arc-shaped member 13, the second arc-shaped member 14 and the third arc-shaped member 15 are externally fitted to the flange 3, the first arc-shaped member 13, the second arc-shaped member 14, By inserting the bulging portion 22 of the third arc-shaped member 15, the first arc-shaped member 13, the second arc-shaped member 14, and the third arc-shaped member 15 are supported by the bulging portion 22, respectively. Since the first arcuate member 13, the second arcuate member 14, and the third arcuate member 15 are stabilized, the first arcuate member 13, the second arcuate member 14, and the third circle are temporarily fixed. Easily fine-tune the circumferential position of the arc-shaped member 15 with respect to the flange 3 It is possible.

以上、本発明の実施例を図面により説明してきたが、具体的な構成はこれら実施例に限られるものではなく、本発明の要旨を逸脱しない範囲における変更や追加があっても本発明に含まれる。 Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

例えば、前記実施例では、本発明に係る管接続部材を空気弁６としたが、本発明に係る管接続部材は、空気弁に限られず、仕切弁やフランジ管、その他の弁装置や流体管であってもよい。 For example, in the above embodiment, the pipe connection member according to the present invention is the air valve 6, but the pipe connection member according to the present invention is not limited to the air valve, but is a gate valve, a flange pipe, other valve devices, or a fluid pipe. It may be.

また、前記実施例では、本発明に係る脱着装置の取付部１０が３分割されているが、取付部の分割数は、３分割に限らず、例えば４分割等の複数に分割されてもよい。 Moreover, in the said Example, although the attaching part 10 of the attachment or detachment apparatus which concerns on this invention is divided into 3, the division | segmentation number of an attaching part is not restricted to 3 divisions, For example, you may divide | segment into multiple, such as 4 divisions. .

また、前記実施例では、第２密封部材２５の内壁は、フランジ３ａ、３ｂの対向面よりも離れるほど内径が漸次大となるように傾斜された傾斜面部２６及びテーパ面部２７とで形成されているが、例えば、図４（ｂ）に示すように、第２密封部材２５’の内壁は、フランジ３ｂに平行に接触するように形成された平行面部２６’とテーパ面２７から形成されてもよい。 Moreover, in the said Example, the inner wall of the 2nd sealing member 25 is formed with the inclined surface part 26 and the taper surface part 27 which were inclined so that an internal diameter may become so large that it may leave | separate from the opposing surface of flange 3a, 3b. However, for example, as shown in FIG. 4B, the inner wall of the second sealing member 25 ′ may be formed of a parallel surface portion 26 ′ and a tapered surface 27 formed so as to be in parallel with the flange 3b. Good.

また、前記実施例では、弁体１１をフランジ３ａ、３ｂの対向面間に挿入する際の弁体１１のガイド部４８として、作業用ボルト４７の外周に筒状体５６を設けているが、ガイド部４８はこれに限られず、例えば、図６（ｂ）に示すように、作業用ボルトの外周の中央部付近から基端部付近にかけての部位をフッ素樹脂被覆５６’で加工することで、作業用ボルトの外周面の摺動性を高めるようにしてもよい。また、筒状体５６に替えて帯状の摺動性の高い樹脂材等からなるシールテープなどを、作業用ボルトに取り付けてもよい。 Moreover, in the said Example, although the cylindrical body 56 is provided in the outer periphery of the volt | bolt 47 for work as the guide part 48 of the valve body 11 at the time of inserting the valve body 11 between the opposing surfaces of flange 3a, 3b, The guide part 48 is not limited to this, for example, as shown in FIG. 6B, by processing a part from the vicinity of the central part of the outer periphery of the working bolt to the vicinity of the base end part with the fluororesin coating 56 ′, You may make it improve the slidability of the outer peripheral surface of a working bolt. Further, instead of the cylindrical body 56, a belt-like sealing tape made of a resin material having a high slidability may be attached to the working bolt.

また、前記実施例では、弁体１１の自然状態での最大幅を、フランジ３において隣接する作業用ボルト・ナット４７、４７の離間間隔よりも大きく形成しているが、例えば、弁体の自然状態での最大幅を、フランジ軸芯を挟んで相対向する作業用ボルト・ナットの対向間隔よりも大きく形成するようにしてもよいし、あるいは、弁体の自然状態での最大幅を、フランジにおいて隣接するボルト・ナットの離間間隔よりも小さく形成するようにしても構わない。 In the above embodiment, the maximum width of the valve body 11 in the natural state is formed to be larger than the spacing between the adjacent work bolts and nuts 47 and 47 in the flange 3. The maximum width in the state may be formed larger than the facing distance between the working bolts and nuts facing each other across the flange shaft core, or the maximum width in the natural state of the valve body may be However, it may be formed smaller than the spacing between adjacent bolts and nuts.

また、前記実施例では、弁体１１は、該弁体１１の両側に可変部４０を備えているが、弁体が該弁体の片側のみに可変部を備えるようにしてもよい。 Moreover, in the said Example, although the valve body 11 is provided with the variable part 40 on both sides of this valve body 11, you may make it a valve body provide a variable part only in the one side of this valve body.

また、前記実施例では、フランジ３は、４つの挿通孔７を有しているが、例えばフランジが６つの挿通孔を有しており、これ等挿通孔のうち１つの挿通孔に挿通されていたボルト・ナットを取り除き、当該挿通孔の両隣の挿通孔に残ったボルト・ナット同士の間に、本発明に係る弁体を挿入するようにしてもよい。 Moreover, in the said Example, although the flange 3 has the four insertion holes 7, the flange has six insertion holes, for example, It is inserted in one insertion hole among these insertion holes. The valve body according to the present invention may be inserted between the bolts and nuts remaining in the insertion holes on both sides of the insertion hole.

１流体管
２連通管（分岐部）
３，３ａ，３ｂフランジ
４フランジ短管（管接続部材）
６空気弁（管接続部材）
９脱着装置
１０取付部
１１弁体
１２弁収容部
１３第１円弧状部材（取付部材、第１部材）
１４第２円弧状部材（取付部材、第２部材）
１５第３円弧状部材（取付部材、第３部材）
１９鍔部
２２膨出部
２３嵌合溝
２４第１密封部材
２５第２密封部材
３５先端部
３６板状部
３７接続部
３９弁体シート部
４０可変部
４１突出部
４２溝部
４７作業用ボルト・ナット（接続具）
４８ガイド部
４９閉塞装置
５６筒状体
５９座面 1 Fluid pipe 2 Communication pipe (branch part)
3, 3a, 3b Flange 4 Flange short pipe (pipe connecting member)
6 Air valve (pipe connecting member)
DESCRIPTION OF SYMBOLS 9 Desorption apparatus 10 Attachment part 11 Valve body 12 Valve accommodating part 13 1st circular arc-shaped member (attachment member, 1st member)
14 Second arc member (mounting member, second member)
15 Third arc member (mounting member, third member)
19 flange portion 22 bulging portion 23 fitting groove 24 first sealing member 25 second sealing member 35 tip portion 36 plate-like portion 37 connecting portion 39 valve body seat portion 40 variable portion 41 projecting portion 42 groove portion 47 working bolt / nut (Connector)
48 Guide portion 49 Closure device 56 Tubular body 59 Seat surface

Claims

A flange interposed between a branch part of an existing fluid pipe and a pipe connection member connected to the branch part is fitted in a sealing manner with an attachment member having a valve body therein, and the valve body is A desorption device for a pipe connection member, which is inserted between opposing surfaces of the flange through a plurality of connecting tools for connecting the flange, and closes the branch portion to desorb the pipe connection member,
The attachment / detachment device for a pipe connection member, wherein the attachment member has a divided structure divided into at least three or more.

The mounting member has a valve housing portion that houses the valve body, and a first member that covers a substantially half circumference of the outer periphery of the flange, a second member that covers the remainder of the outer circumference of the flange substantially equally, and a third member 2. The pipe connecting member attaching / detaching device according to claim 1, wherein the pipe connecting member attaching / detaching device has a three-part structure comprising members.

The pipe attachment member attaching / detaching device according to claim 1, wherein the attachment member includes a bulging portion that bulges toward an inner diameter direction of the flange.