JP2022023939A

JP2022023939A - Flange reinforcing tool

Info

Publication number: JP2022023939A
Application number: JP2021176522A
Authority: JP
Inventors: 洋一郎星野; Yoichiro Hoshino; 卓也東海林; Takuya Shoji
Original assignee: Cosmo Koki Co Ltd
Current assignee: Cosmo Koki Co Ltd
Priority date: 2017-11-08
Filing date: 2021-10-28
Publication date: 2022-02-08
Anticipated expiration: 2037-11-08
Also published as: JP7245888B2

Abstract

PROBLEM TO BE SOLVED: To provide a flange reinforcing tool capable of coupling a pair of holding members even if the surrounding of a connecting member is narrow.

SOLUTION: A flange reinforcing tool 10 holds both flanges 2d and 3c of conduit configuring members 2 and 3 respectively joined with both flanges 4c and 4d of a connecting member 4, with a pair of holding members 11 and 14 forming an annular shape, and couples them in conduit axial directions of the conduit configuring members 2 and 3 with a coupling member 17 for reinforcing. The coupling member 17 is a bolt and a nut coupling the holding members 11 and 14. The holding members 11 and 14 are equipped with a plurality of divided bodies that have a notch portion in which a shaft portion of the bolt can inserted from an outer diameter side toward an inner diameter side, and is divided in a circumferential direction, and a uniting member 18 that unites them. At least one of the pair of holding members 11 and 14 is provided with a locking portion capable of locking to an upper surface of a flange joint portion between the connecting member 4 and the conduit configuring members 2 and 3.

SELECTED DRAWING: Figure 1

Description

本発明は、接続部材と該接続部材の両側に接合される管路構成部材とのフランジ接合を補強するフランジ補強具に関する。 The present invention relates to a flange reinforcing tool for reinforcing a flange joint between a connecting member and a pipeline constituent member joined to both sides of the connecting member.

流体管路を構成する管路構成部材の各所には、例えば、補修弁や仕切弁等の接続部材が設けられており、接続部材により流体管路の制御を行えるようにしたものがある。このような接続部材及び管路構成部材は、接続部材の両端に設けられたフランジと、接続部材の両側に配置される管路構成部材のフランジと、が接合され、ボルトナットなどの締結具により密封状に接続されている。 For example, connecting members such as repair valves and sluice valves are provided in various parts of the pipeline constituent members constituting the fluid pipeline, and the fluid pipeline can be controlled by the connecting members. In such a connecting member and a pipeline constituent member, flanges provided at both ends of the connecting member and flanges of the pipeline constituent member arranged on both sides of the connecting member are joined to each other by means of fasteners such as bolts and nuts. It is connected in a sealed manner.

このようにフランジ同士を接合する場合、経年による腐食や不等沈下、或いは地震等の外力などにより接合部分から流体管路内の流体が外側に漏れてしまう虞があった。そこで、特許文献１に示されるように、接続部材の両フランジにそれぞれ接合される管路構成部材のフランジにおいて、接続部材のフランジに接続される接続面とは反対側のフランジ面に当接するように一対の狭持部材を配置し、一対の狭持部材をボルトナットなどから構成される連結部材で管路軸方向に連結することで、接続部材と管路構成部材とのフランジ接合を補強するフランジ補強具が開発されている。この狭持部材は、周方向で二分され、その分割体の周方向の端部同士を結合部材により管路軸方向と直交する方向に結合することにより構成されるようになっているため、管路構成部材のフランジに対して狭持部材を設置する作業を簡便に行えるようになっている。 When the flanges are joined to each other in this way, there is a risk that the fluid in the fluid pipeline may leak to the outside from the joined portion due to corrosion due to aging, uneven settlement, external force such as an earthquake, or the like. Therefore, as shown in Patent Document 1, the flanges of the pipeline constituent members joined to both flanges of the connecting member are brought into contact with the flange surface on the opposite side to the connecting surface connected to the flange of the connecting member. A pair of narrow-holding members are arranged in the pipe, and the pair of narrow-holding members are connected in the pipeline axial direction by a connecting member composed of bolts and nuts to reinforce the flange joint between the connecting member and the pipeline component. Flange reinforcements have been developed. This narrowing member is divided into two in the circumferential direction, and the end portions of the divided body in the circumferential direction are connected to each other by a connecting member in a direction orthogonal to the pipeline axial direction, so that the pipe is formed. The work of installing the narrow holding member with respect to the flange of the road constituent member can be easily performed.

また、特許文献２に示されるように、分割体の周方向の端部同士を結合部材により管路軸方向に結合することにより、例えば、接続部材が、開口部を有する狭隘な弁筐内に配置されている場合等であっても、管路構成部材の管路軸方向と直交する方向に大きなスペースを必要とせずに組み立てられるようになっており、そのように構成された一対の狭持部材を連結部材により管路軸方向に連結したものもある。 Further, as shown in Patent Document 2, by connecting the peripheral ends of the split body to each other in the pipeline axial direction by a connecting member, for example, the connecting member is placed in a narrow valve housing having an opening. Even when they are arranged, they can be assembled without requiring a large space in the direction orthogonal to the pipeline axial direction of the pipeline constituent members, and a pair of narrow holdings configured in this way. In some cases, the members are connected in the direction of the pipeline axis by a connecting member.

特許第４１５７１９８号公報（第５、６頁、第１図）Japanese Patent No. 4157198 (pages 5 and 6, FIG. 1) 特開２０１６－１８０４５２号公報（第９頁、第１３図）Japanese Unexamined Patent Publication No. 2016-180452 (page 9, FIG. 13)

しかしながら、特許文献１及び特許文献２のフランジ補強具にあっては、連結部材が管路軸方向に延びており、連結部材を結合するストロークが管路軸方向に長くなるため、フランジ接合部分の周辺の管路構成部材や接続部材を囲繞する弁筐等に連結部材が干渉してしまい、一対の挟持部材の連結作業を行うことができない虞が生じるという問題があった。 However, in the flange reinforcing tools of Patent Document 1 and Patent Document 2, the connecting member extends in the pipeline axial direction, and the stroke for connecting the connecting members becomes long in the pipeline axial direction. There is a problem that the connecting member interferes with the peripheral pipeline constituent member, the valve housing surrounding the connecting member, and the like, and there is a possibility that the pair of holding members cannot be connected.

本発明は、このような問題点に着目してなされたもので、接続部材の周囲が狭いスペースであっても一対の挟持部材の連結作業を行うことができるフランジ補強具を提供することを目的とする。 The present invention has been made focusing on such a problem, and an object of the present invention is to provide a flange reinforcing tool capable of connecting a pair of holding members even in a narrow space around the connecting member. And.

前記課題を解決するために、本発明のフランジ補強具は、
両端にフランジを有する接続部材の両フランジにそれぞれ接合される管路構成部材の両フランジを、環状を成す一対の狭持部材で狭持し、該一対の狭持部材を連結部材で前記管路構成部材の管路軸方向に連結してフランジ接合を補強するフランジ補強具であって、
前記連結部材は、前記一対の狭持部材を連結するボルト及びナットであり、前記狭持部材は、該狭持部材の外径側から内径側に向けて前記ボルトの軸部を挿通可能な切欠部を有していることを特徴としている。
この特徴によれば、ボルトの軸部を切欠部に対して外径側から内径側に向けて挿入することで、ボルトを挿入するストロークを小さくできるため、ボルトが管路構成部材や周辺の弁筐等に干渉することを抑制できる。 In order to solve the above problems, the flange reinforcing tool of the present invention is used.
Both flanges of the pipeline constituent member to be joined to both flanges of the connecting member having flanges at both ends are sandwiched by a pair of annular holding members, and the pair of sandwiching members are held by the connecting member in the pipeline. It is a flange reinforcing tool that reinforces the flange joint by connecting the components in the direction of the pipeline axis.
The connecting member is a bolt and a nut that connect the pair of holding members, and the holding member is a notch through which the shaft portion of the bolt can be inserted from the outer diameter side to the inner diameter side of the holding member. It is characterized by having a part.
According to this feature, by inserting the shaft of the bolt from the outer diameter side to the inner diameter side with respect to the notch, the stroke for inserting the bolt can be reduced, so that the bolt can be used as a pipeline component or a peripheral valve. It is possible to suppress interference with the housing and the like.

前記狭持部材は、周方向に分割された複数の分割体と、前記複数の分割体を結合する結合部材と、を備え、前記結合部材は、前記管路構成部材の管路軸方向に延びていることを特徴としている。
この特徴によれば、結合部材を管路構成部材の管路軸方向に挿入して複数の分割体を結合することで、結合部材の結合方向を連結部材の結合方向と同じく管路構成部材の管路軸方向とすることができるため、管路構成部材の管路軸方向と直交する方向に大きなスペースを必要とせず、接続部材の周囲が狭いスペースであっても狭持部材を組み立てることができる。 The narrowing member includes a plurality of divided bodies divided in the circumferential direction and a connecting member for connecting the plurality of divided bodies, and the connecting member extends in the pipeline axial direction of the pipeline constituent member. It is characterized by being.
According to this feature, by inserting the connecting member in the pipeline axial direction of the pipeline constituent member and joining the plurality of divided bodies, the coupling direction of the coupling member is the same as the coupling direction of the connecting member. Since it can be in the axial direction of the pipeline, a large space is not required in the direction orthogonal to the axial direction of the pipeline constituent member, and the narrow holding member can be assembled even if the space around the connecting member is narrow. can.

前記分割体は、周方向に延びる本体部と、該本体部の両端部に設けられ、前記結合部材が挿通される結合部と、を有し、前記分割体の前記結合部は、該結合部に隣接する分割体の結合部と管路軸方向に重畳するように、前記本体部の周方向の延長線上に設けられていることを特徴としている
この特徴によれば、結合部材が挿通される結合部が本体部の周方向の延長線上に設けられることから、分割体同士の結合強度が高くなるため、一対の狭持部材に対して連結部材の締結力を管路軸方向に効率よく伝えることができる。 The divided body has a main body portion extending in the circumferential direction and a connecting portion provided at both ends of the main body portion through which the connecting member is inserted, and the connecting portion of the divided body is the connecting portion. It is characterized in that it is provided on an extension line in the circumferential direction of the main body portion so as to overlap with the connecting portion of the divided body adjacent to the main body portion in the pipeline axial direction. According to this feature, the connecting member is inserted. Since the connecting portion is provided on the extension line in the circumferential direction of the main body portion, the bonding strength between the divided bodies is high, so that the fastening force of the connecting member is efficiently transmitted to the pair of narrow holding members in the pipeline axial direction. be able to.

前記連結部材が取付けられる前記分割体は、第１結合部を備え、前記連結部材が取付けられる前記分割体に隣接する分割体は、前記第１結合部よりも管路軸方向内側に重畳する第２結合部を有することを特徴としている。
この特徴によれば、連結部材が取付けられる分割体の第１結合部が隣接する分割体の第２結合部の管路軸方向外側に配置されるため、第２結合部に対して連結部材の締結力を効率よく伝えることができる。 The split body to which the connecting member is attached includes a first joint portion, and the split body adjacent to the split body to which the connecting member is attached is superimposed on the inner side in the pipe axis direction with respect to the first connecting portion. It is characterized by having two joints.
According to this feature, since the first joint portion of the split body to which the connecting member is attached is arranged outside the pipeline axial direction of the second joint portion of the adjacent split body, the connecting member is provided with respect to the second connecting portion. The fastening force can be transmitted efficiently.

前記分割体は、一方の端部に前記第１結合部を備え、他方の端部に前記第２結合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、第１結合部と第２結合部とを狭持部材の周方向にバランスよく配置できるため、連結部材の締結力を狭持部材の周方向にバランスよく伝えることができる。 The split body is characterized in that one end thereof is provided with the first joint portion and the other end portion is provided with the second joint portion.
According to this feature, since the first joint portion and the second joint portion can be arranged in a well-balanced manner in the circumferential direction of the narrow-holding member, the fastening force of the connecting member can be transmitted in a well-balanced manner in the circumferential direction of the narrow-holding member.

前記一対の狭持部材において、前記結合部材の位置が周方向にずれて配置されていることを特徴としている。
この特徴によれば、分割体同士を連結する結合部材が連結方向に重畳しないため、一対の狭持部材を連結部材で連結した際にかかる締結力に対する強度が高まるばかりか、それぞれの結合部材を容易に取付けできる。 The pair of narrow holding members are characterized in that the positions of the connecting members are displaced in the circumferential direction.
According to this feature, since the connecting members that connect the divided bodies do not overlap in the connecting direction, not only the strength against the fastening force applied when the pair of narrow holding members are connected by the connecting member is increased, but also the respective connecting members are connected. Easy to install.

前記一対の狭持部材は、前記ボルトの頭部または前記ナットが外径側に移動したときに干渉する規制部が形成されていることを特徴としている。
この特徴によれば、ボルトの頭部及びナットが外径側に移動したときに一対の狭持部材の規制部にそれぞれ干渉することで、連結部材が切欠部から離脱することを防止できる。 The pair of narrowing members are characterized in that a restricting portion that interferes when the head of the bolt or the nut moves to the outer diameter side is formed.
According to this feature, when the head of the bolt and the nut move to the outer diameter side, they interfere with the restricting portion of the pair of narrow holding members, respectively, so that the connecting member can be prevented from coming off from the notched portion.

前記狭持部材は、前記接続部材と前記管路構成部材とのフランジ接合部の上面に係止可能な係止部が設けられていることを特徴としている。
この特徴によれば、係止部により狭持部材を管路構成部材の上面に係止させて仮置きできるため、一対の狭持部材を連結部材で連結する作業が簡便である。 The narrow holding member is characterized in that a locking portion that can be locked is provided on the upper surface of a flange joint portion between the connecting member and the pipeline constituent member.
According to this feature, since the narrow-holding member can be temporarily placed by locking the narrow-holding member on the upper surface of the pipeline constituent member by the locking portion, the work of connecting the pair of narrow-holding members with the connecting member is simple.

（ａ）は補修弁と消火栓及び分岐首部とに実施例１におけるフランジ補強具を取付けた状態を示す側面図、（ｂ）はフランジ補強具の取付け対象となる補修弁と消火栓及び分岐首部とを示す側面図である。(A) is a side view showing a state in which the flange reinforcing tool according to the first embodiment is attached to the repair valve, the fire hydrant and the branch neck portion, and (b) is the repair valve, the fire hydrant and the branch neck portion to which the flange reinforcing tool is attached. It is a side view which shows. フランジ補強具の構造を示す斜視図である。It is a perspective view which shows the structure of a flange reinforcing tool. （ａ）は、第１狭持部材を構成する分割体の上面図、（ｂ）は同じく左側面図、（ｃ）は同じく右側面図、（ｄ）は同じく正面図、（ｅ）は同じく下面図である。(A) is a top view of the divided body constituting the first holding member, (b) is the same left side view, (c) is the same right side view, (d) is the same front view, and (e) is the same. It is a bottom view. （ａ）は第２狭持部材を流体管の分岐部フランジに取付ける様子を示す上面図、（ｂ）は第２狭持部材を流体管の分岐部フランジに取付けた状態を示す上面図、（ｃ）は図４（ｂ）に示すＡ－Ａ断面図である。(A) is a top view showing a state in which the second narrowing member is attached to the branch portion flange of the fluid pipe, and (b) is a top view showing a state in which the second narrowing member is attached to the branch portion flange of the fluid pipe. c) is a cross-sectional view taken along the line AA shown in FIG. 4 (b). 第２狭持部材を補修弁のフランジに取付けた状態を示す側面図である。It is a side view which shows the state which the 2nd narrowing member was attached to the flange of a repair valve. （ａ）は第１狭持部材を消火栓のフランジに取付けた状態を示す上面図、（ｂ）は第１狭持部材と第２狭持部材とを連結部材により連結した状態を示す上面図、（ｃ）は図６（ａ）に示すＢ－Ｂ断面図である。(A) is a top view showing a state in which the first narrowing member is attached to the flange of the fire hydrant, and (b) is a top view showing a state in which the first narrowing member and the second narrowing member are connected by a connecting member. (C) is a cross-sectional view taken along the line BB shown in FIG. 6 (a). 第１狭持部材と第２狭持部材とを連結部材により連結した状態を示す側面図である。It is a side view which shows the state which the 1st narrow holding member and the 2nd narrow holding member are connected by the connecting member. （ａ）は変形例における結合部材を用いたフランジ補強具を示す側面図、（ｂ）は図８（ａ）に示すＣ－Ｃ断面図、（Ｃ）は図８（ｂ）に示すＤ－Ｄ断面図である。(A) is a side view showing a flange reinforcing tool using a coupling member in a modified example, (b) is a sectional view taken along the line CC shown in FIG. 8 (a), and (C) is a D-shown in FIG. 8 (b). It is a cross-sectional view of D.

本発明に係るフランジ補強具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。 A mode for carrying out the flange reinforcing tool according to the present invention will be described below based on examples.

図１に示されるように、流体管３の分岐首部３ｂに設けられた分岐部フランジ３ｃには補修弁４のフランジ４ｃが接続され、補修弁４のフランジ４ｄには消火栓２のフランジ２ｄが接続され、流体管３の分岐部フランジ３ｃと消火栓２のフランジ２ｄとがフランジ補強具１０によって結合、補強される。ここで、補修弁４が本発明に係る接続部材に相当し、補修弁４のフランジ４ｃ，４ｄが本発明に係る接続部材の両フランジに相当する。また、流体管３及び消火栓２が本発明に係る管路構成部材に相当し、流体管３の分岐部フランジ３ｃ及び消火栓２のフランジ２ｄが本発明に係る管路構成部材の両フランジに相当する。また、図１において、上下方向が管路軸方向に相当する。 As shown in FIG. 1, the flange 4c of the repair valve 4 is connected to the branch flange 3c provided on the branch neck 3b of the fluid pipe 3, and the flange 2d of the fire hydrant 2 is connected to the flange 4d of the repair valve 4. The branch flange 3c of the fluid pipe 3 and the flange 2d of the fire hydrant 2 are connected and reinforced by the flange reinforcing tool 10. Here, the repair valve 4 corresponds to the connecting member according to the present invention, and the flanges 4c and 4d of the repair valve 4 correspond to both flanges of the connecting member according to the present invention. Further, the fluid pipe 3 and the fire extinguishing plug 2 correspond to the pipeline constituent members according to the present invention, and the branch flange 3c of the fluid pipe 3 and the flange 2d of the fire extinguishing plug 2 correspond to both flanges of the pipeline constituent member according to the present invention. .. Further, in FIG. 1, the vertical direction corresponds to the pipeline axial direction.

ここで、流体管３は、既設流体管あるいは新設流体管であってもよく、地中に埋設される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。 Here, the fluid pipe 3 may be an existing fluid pipe or a new fluid pipe, is made of ductile cast iron 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 done. The fluid pipe according to the present invention may be made of other metal such as cast iron or steel, or may be made of concrete, vinyl chloride, polyethylene, polyolefin or the like. 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 an appropriate material may be coated on the inner peripheral surface of the fluid pipe by powder coating. Further, in this embodiment, the fluid in the fluid pipe is clean water, but the fluid is not limited to the clean water of this embodiment, for example, industrial water, agricultural water, sewage, etc., as well as gas or a gas-liquid mixture of gas and liquid. It doesn't matter.

図１（ａ）及び図２に示されるように、フランジ補強具１０は、消火栓２のフランジ２ｄを管路軸方向に狭持する上側の第１狭持部材１１と、流体管３の分岐部フランジ３ｃを管路軸方向に狭持する下側の第２狭持部材１４と、第１狭持部材１１と第２狭持部材１４を連結する連結部材１７と、後述する分割体１２，１２’を一体に結合して環状の第１狭持部材１１及び第２狭持部材１４を構成する結合部材１８と、から主に構成される。 As shown in FIGS. 1A and 2, the flange reinforcing tool 10 includes an upper first narrowing member 11 that narrows the flange 2d of the fire hydrant 2 in the direction of the pipeline axis, and a branch portion of the fluid pipe 3. The lower second narrowing member 14 that narrows the flange 3c in the direction of the pipeline axis, the connecting member 17 that connects the first narrowing member 11 and the second narrowing member 14, and the divided bodies 12 and 12 described later. It is mainly composed of a connecting member 18 that integrally joins'to form an annular first narrowing member 11 and a second narrowing member 14.

以下、第１狭持部材１１及び第２狭持部材１４について説明する。尚、第２狭持部材１４は、第１狭持部材１１と同一構造を有し、上下反転された状態で取り付けられるものであるので、第１狭持部材１１について説明し、第２狭持部材１４の説明を省略する。 Hereinafter, the first narrow-holding member 11 and the second narrow-holding member 14 will be described. Since the second narrow-holding member 14 has the same structure as the first narrow-holding member 11 and is attached in an upside-down state, the first narrow-holding member 11 will be described and the second narrow-holding member 11 will be described. The description of the member 14 will be omitted.

図２に示されるように、第１狭持部材１１は、周方向に分割された分割体１２，１２’からなり、該分割体１２，１２’は結合部材１８（図１（ａ）参照）により結合されることで、環状一体に構成される。この結合部材１８は、ボルト１８ａ及びナット１８ｂから構成されている。尚、本実施例においては、第１狭持部材１１を２分割した実施例を示したが、これに限らず３分割以上に分割してもよい。 As shown in FIG. 2, the first narrowing member 11 is composed of the divided bodies 12 and 12'divided in the circumferential direction, and the divided bodies 12 and 12'are the coupling member 18 (see FIG. 1A). By being connected by, it is configured as an annular unit. The coupling member 18 is composed of a bolt 18a and a nut 18b. In this embodiment, the first narrowing member 11 is divided into two parts, but the present invention is not limited to this, and the first narrowing member 11 may be divided into three or more parts.

図２及び図３に示されるように、分割体１２は、径方向内側を向くように周方向の２箇所に形成される狭持部１２ａ，１２ａ’と、該狭持部１２ａ，１２ａ’に対応する周方向位置で径方向外側を向くように周方向の２箇所に形成される狭持鍔部１２ｃ，１２ｃ’と、一方の狭持部１２ａの基部と他方の狭持部１２ａ’の基部とを連結する連結アーム部１２ｂと、一方の狭持部１２ａの基部から他方の狭持部１２ａ’とは反対方向に延びるアーム部１２ｄと、を備えている。尚、分割体１２には、狭持部１２ａ及び狭持鍔部１２ｃが１つまたは３つ以上の複数ずつ設けられていてもよい。 As shown in FIGS. 2 and 3, the divided body 12 is formed into the narrowed portions 12a and 12a'formed at two points in the circumferential direction so as to face inward in the radial direction, and the narrowed portions 12a and 12a'. Narrow collar portions 12c, 12c'formed at two locations in the circumferential direction so as to face radially outward at the corresponding circumferential positions, and the base of one narrow holding portion 12a and the base of the other narrow holding portion 12a'. It is provided with a connecting arm portion 12b for connecting the above, and an arm portion 12d extending from the base of one holding portion 12a in the direction opposite to the other holding portion 12a'. The divided body 12 may be provided with one or more narrow holding portions 12a and a plurality of narrow holding flange portions 12c.

狭持部１２ａ，１２ａ’は、狭持部１２ａの基部の上端縁から径方向内側に突出する２つの突状部１２ｅ，１２ｅから構成されている。また、一方の狭持部１２ａの基部の下端縁には、径方向内側に突出する突状部１２ｊ，１２ｊ（係止部）が形成されている。また、狭持鍔部１２ｃ，１２ｃ’は、狭持部１２ａ，１２ａ’の基部から外径側に突出しており、該狭持鍔部１２ｃ，１２ｃ’には、外径方向から内径方向に向けて切り欠かれた切欠部１２ｆが形成されている。狭持鍔部１２ｃ，１２ｃ’において切欠部１２ｆを構成する壁部１２ｋ，１２ｋの外端縁には、上方に突出する凸部１２ｍ（規制部）がそれぞれ設けられている。 The narrowed portion 12a, 12a'is composed of two protruding portions 12e, 12e protruding inward in the radial direction from the upper end edge of the base portion of the narrowed portion 12a. Further, protruding portions 12j and 12j (locking portions) protruding inward in the radial direction are formed on the lower end edge of the base portion of one of the narrow holding portions 12a. Further, the narrow holding flange portions 12c and 12c'protrude from the base portions of the narrow holding flange portions 12a and 12a' toward the outer diameter side, and the narrow holding flange portions 12c and 12c' are directed from the outer diameter direction to the inner diameter direction. The cutout portion 12f is formed. On the outer end edges of the wall portions 12k and 12k constituting the notch portion 12f in the narrow holding flange portions 12c and 12c', convex portions 12m (regulating portions) projecting upward are provided, respectively.

また、連結アーム部１２ｂは、一方の狭持部１２ａの基部の下端部と、他方の狭持部１２ａ’の基部の下端部とを連結するように略円弧状に形成されている。また、アーム部１２ｄは、一方の狭持部１２ａの基部の上端部から略水平方向に、連結アーム部１２ｂと同心且つ同径の略円弧状に形成されている。また、アーム部１２ｄの端部には、アーム部１２ｄの下端部から周方向に突出する結合部１２ｇ（第２結合部）が形成されており、結合部１２ｇには、上下方向に貫通する貫通孔１２ｈが形成されている。また、他方の狭持部１２ａ’の基部の端部には、他方の狭持部１２ａ’の基部の上端部から周方向に突出する結合部１２ｐ（第１結合部）が形成されており、結合部１２ｐには、上下方向に貫通する貫通孔１２ｑが形成されている。すなわち、結合部１２ｐは、狭持鍔部１２ｃ’の近傍に設けられている。 Further, the connecting arm portion 12b is formed in a substantially arc shape so as to connect the lower end portion of the base portion of one narrow holding portion 12a and the lower end portion of the base portion of the other narrow holding portion 12a'. Further, the arm portion 12d is formed in a substantially arc shape concentric with the connecting arm portion 12b and having the same diameter as the connecting arm portion 12b in a substantially horizontal direction from the upper end portion of the base portion of one of the narrow holding portions 12a. Further, a coupling portion 12g (second coupling portion) protruding in the circumferential direction from the lower end portion of the arm portion 12d is formed at the end portion of the arm portion 12d, and the coupling portion 12g penetrates in the vertical direction. The hole 12h is formed. Further, at the end of the base of the other holding portion 12a', a connecting portion 12p (first connecting portion) protruding in the circumferential direction from the upper end of the base of the other holding portion 12a'is formed. A through hole 12q that penetrates in the vertical direction is formed in the connecting portion 12p. That is, the connecting portion 12p is provided in the vicinity of the narrow holding flange portion 12c'.

また、分割体１２’は、分割体１２と同一構成となっている。特に図２に示されるように、これら分割体１２，１２’を結合する際には、分割体１２の結合部１２ｇと分割体１２’の結合部１２ｐとを上下に重ねた状態で、貫通孔１２ｈ，１２ｑの下方からボルト１８ａを挿入し上方からナット１８ｂを緊締する。同様に、分割体１２の結合部１２ｐと分割体１２’の結合部１２ｇとを上下に重ねた状態で、貫通孔１２ｈ，１２ｑの下方からボルト１８ａを挿入し上方からナット１８ｂを緊締する。このとき、分割体１２の結合部１２ｐは分割体１２’の結合部１２ｇよりも上方（管路軸方向外側）に位置しており、分割体１２’の結合部１２ｐは分割体１２の結合部１２ｇよりも上方（管路軸方向外側）に位置している。ここで、ボルト１８ａを上方から挿入し、下方からナット１８ｂを緊締してもよい。 Further, the divided body 12'has the same configuration as the divided body 12. In particular, as shown in FIG. 2, when these split bodies 12 and 12'are joined together, the through hole is provided with the connecting portion 12g of the split body 12 and the connecting portion 12p of the split body 12'overlapping. The bolt 18a is inserted from below 12h and 12q, and the nut 18b is tightened from above. Similarly, in a state where the joint portion 12p of the split body 12 and the joint portion 12g of the split body 12'are overlapped vertically, the bolt 18a is inserted from below the through holes 12h and 12q, and the nut 18b is tightened from above. At this time, the connecting portion 12p of the split body 12 is located above the connecting portion 12g of the split body 12'(outside in the direction of the pipeline axis), and the connecting portion 12p of the split body 12'is the connecting portion of the split body 12. It is located above 12 g (outside in the direction of the pipeline axis). Here, the bolt 18a may be inserted from above and the nut 18b may be tightened from below.

これら分割体１２，１２’が結合されることにより、上方から見て環状を成す第１狭持部材１１が構成される。尚、分割体１２，１２’の各狭持部１２ａ，１２ａ’の基部、各連結アーム部１２ｂ及び各アーム部１２ｄは、第１狭持部材１１を環状に構成する本体部であり、分割体１２，１２’の各結合部１２ｇ，１２ｐは、周方向に延びる前記本体部の延長線上に設けられている。更に尚、第２狭持部材１４は、上記のように結合した分割体１２，１２’を上下反転した状態で、連結部材１７により第１狭持部材１１と接続される。すなわち、図３（ｅ）は第２狭持部材１４を構成する分割体１２，１２’の上面図として示され、図３（ａ）は第２狭持部材１４を構成する分割体１２，１２’の下面図として示される。 By combining these divided bodies 12 and 12', the first narrowing member 11 forming an annular shape when viewed from above is formed. The bases of the narrowed portions 12a and 12a'of the divided bodies 12 and 12', the connecting arm portions 12b and the arm portions 12d are main body portions that form the first narrowing member 11 in an annular shape, and are divided bodies. The connecting portions 12g and 12p of 12, 12'are provided on an extension line of the main body portion extending in the circumferential direction. Furthermore, the second narrowing member 14 is connected to the first narrowing member 11 by the connecting member 17 in a state where the divided bodies 12 and 12'combined as described above are turned upside down. That is, FIG. 3 (e) is shown as a top view of the split bodies 12 and 12'constituting the second narrowing member 14, and FIG. 3 (a) is a split body 12 and 12 constituting the second narrowing member 14. Shown as a bottom view of'.

次に、フランジ補強具１０を使用してフランジ接合を補強する手順について説明する。尚、本実施例では、流体管３の分岐首部３ｂ、補修弁４、消火栓２を囲繞する平面視略長方形状の比較的狭隘な弁筐２０内でフランジ補強具１０を取付ける形態を例示する。なお、弁筐の形状は必ずしも平面視略長方形状に限られず、例えば略円形、楕円形、小判形等であっても構わない。 Next, a procedure for reinforcing the flange joint by using the flange reinforcing tool 10 will be described. In this embodiment, the flange reinforcing tool 10 is attached in a relatively narrow valve housing 20 having a substantially rectangular shape in a plan view surrounding the branch neck portion 3b of the fluid pipe 3, the repair valve 4, and the fire hydrant 2. The shape of the valve casing is not necessarily limited to a substantially rectangular shape in a plan view, and may be, for example, a substantially circular shape, an elliptical shape, an oval shape, or the like.

先ず、図４に示されるように、弁筐２０の上方を被覆するように載置された図示しない蓋体を取外し、開放された弁筐２０の上端の開口から第２狭持部材１４を挿入して流体管３の分岐部フランジ３ｃに取付ける。具体的には、図４（ａ）に示されるように、第２狭持部材１４を構成する分割体１２の結合部１２ｐと分割体１２’の結合部１２ｇとを結合部材１８により結合し、分割体１２の結合部１２ｇと分割体１２’の結合部１２ｐとを結合部材１８により結合しない状態（結合部材１８を取外した状態）として弁筐２０の上方の開口から分岐部フランジ３ｃの近傍まで挿入する。このとき、分割体１２の結合部１２ｐと分割体１２’の結合部１２ｇとを結合する結合部材１８のボルト１８ａとナット１８ｂとを緩めておく。これにより、分割体１２，１２’が結合部材１８を支点として回動するようになるため、分割体１２，１２’を開いた状態で流体管３の分岐部フランジ３ｃの外径側に配置することができる。 First, as shown in FIG. 4, the lid (not shown) placed so as to cover the upper part of the valve housing 20 is removed, and the second narrowing member 14 is inserted from the opening at the upper end of the opened valve housing 20. Then, it is attached to the branch flange 3c of the fluid pipe 3. Specifically, as shown in FIG. 4A, the coupling portion 12p of the split body 12 constituting the second narrowing member 14 and the coupling portion 12g of the split body 12'are bonded by the coupling member 18. From the opening above the valve housing 20 to the vicinity of the branch flange 3c as a state in which the coupling portion 12g of the split body 12 and the coupling portion 12p of the split body 12'are not coupled by the coupling member 18 (the state in which the coupling member 18 is removed). insert. At this time, the bolt 18a and the nut 18b of the coupling member 18 that couples the coupling portion 12p of the split body 12 and the coupling portion 12g of the split body 12'are loosened. As a result, the divided bodies 12 and 12'rotate around the coupling member 18 as a fulcrum. Therefore, the divided bodies 12 and 12'are arranged on the outer diameter side of the branch flange 3c of the fluid pipe 3 with the divided bodies 12 and 12'open. be able to.

その後、図４（ｂ）及び図５に示されるように、分割体１２，１２’を閉じ、分割体１２の結合部１２ｇと分割体１２’の結合部１２ｐとを上下方向に重畳させ、結合部材１８により結合し、第２狭持部材１４を流体管３の分岐部フランジ３ｃに取付ける。このときには、図４（ｃ）に示されるように、狭持部１２ａ（狭持部１２ａ’）の突状部１２ｅ，１２ｅが分岐部フランジ３ｃの下方に配置されるとともに、突状部１２ｊ，１２ｊが補修弁４のフランジ４ｃの上面に載置される。このように、突状部１２ｊ，１２ｊが補修弁４のフランジ４ｃの上面に載置され、分割体１２，１２’を補修弁４のフランジ４ｃに預けた状態で、分割体１２，１２’を結合部材１８により結合する作業を行うことができる。 After that, as shown in FIGS. 4 (b) and 5, the divided bodies 12 and 12'are closed, and the connecting portion 12g of the divided body 12 and the connecting portion 12p of the divided body 12' are superimposed in the vertical direction and joined. It is connected by the member 18, and the second narrowing member 14 is attached to the branch flange 3c of the fluid pipe 3. At this time, as shown in FIG. 4C, the protruding portions 12e and 12e of the narrowed portion 12a (narrowed portion 12a') are arranged below the branch portion flange 3c, and the protruding portions 12j, 12j is placed on the upper surface of the flange 4c of the repair valve 4. In this way, the projecting portions 12j and 12j are placed on the upper surface of the flange 4c of the repair valve 4, and the split bodies 12 and 12'are deposited on the flange 4c of the repair valve 4 and the split bodies 12 and 12'are placed. The work of joining with the connecting member 18 can be performed.

次に、図６（ａ）及び図７に示されるように、上記と同様の手順により第１狭持部材１１を消火栓２のフランジ２ｄに取付ける。このとき、第１狭持部材１１の結合部材１８、つまり、第１狭持部材１１の結合部１２ｇ，１２ｐが第２狭持部材１４の結合部１２ｇ，１２ｐに対して周方向にずれるように第１狭持部材１１を消火栓２のフランジ２ｄに取付けるようにするのが好ましい（図２参照）。 Next, as shown in FIGS. 6A and 7, the first narrowing member 11 is attached to the flange 2d of the fire hydrant 2 by the same procedure as described above. At this time, the connecting member 18 of the first holding member 11, that is, the connecting portions 12g and 12p of the first holding member 11 is displaced in the circumferential direction with respect to the connecting portions 12g and 12p of the second holding member 14. It is preferable that the first narrowing member 11 is attached to the flange 2d of the fire hydrant 2 (see FIG. 2).

また、図６（ｃ）に示されるように、狭持部１２ａ（狭持部１２ａ’）の突状部１２ｅ，１２ｅが消火栓２のフランジ２ｄの上面に載置されるとともに、突状部１２ｊ，１２ｊが補修弁４のフランジ４ｄの下方に配置される。このように、突状部１２ｅ，１２ｅが消火栓２のフランジ２ｄの上面に載置され、分割体１２，１２を消火栓２のフランジ２ｄに預けた状態で、分割体１２，１２’を結合部材１８により結合する作業を行うことができる。すなわち、狭持部１２ａ，１２ａ’の突状部１２ｅ，１２ｅが消火栓２のフランジ２ｄに係止される係止部として機能する。 Further, as shown in FIG. 6 (c), the protruding portions 12e and 12e of the narrow holding portion 12a (narrow holding portion 12a') are placed on the upper surface of the flange 2d of the fire hydrant 2 and the protruding portion 12j is placed. , 12j are arranged below the flange 4d of the repair valve 4. In this way, the projecting portions 12e and 12e are placed on the upper surface of the flange 2d of the fire hydrant 2, and the divided bodies 12 and 12 are deposited on the flange 2d of the fire hydrant 2 and the divided bodies 12 and 12'are connected to the connecting member 18. The work of joining can be performed. That is, the protruding portions 12e and 12e of the narrow holding portions 12a and 12a'function as locking portions to be locked to the flange 2d of the fire hydrant 2.

次に、図６（ａ）及び図７に示されるように、第１狭持部材１１の狭持鍔部１２ｃ，１２ｃ’と、該狭持鍔部１２ｃ，１２ｃ’と上下に対応する第２狭持部材１４の狭持鍔部１２ｃ，１２ｃ’と、に渡って連結部材１７を取付けて連結する。詳しくは、弁筐２０の上方の開口から上下に対応する一対の狭持鍔部１２ｃ，１２ｃ’の切欠部１２ｆの外径側まで連結部材１７を構成するＴ頭ボルト１７ａを挿入する。このとき、Ｔ頭ボルト１７ａの頭部１７ｃが下方側に位置するように挿入する。続いて、切欠部１２ｆの外径側から内径側にＴ頭ボルト１７ａの軸部１７ｄを挿入する。このとき、Ｔ頭ボルト１７ａの頭部１７ｃが第２狭持部材１４の凸部１２ｍに干渉しないように、頭部１７ｃを凸部１２ｍよりも下方に位置させた状態で切欠部１２ｆの外径側から内径側にＴ頭ボルト１７ａの軸部１７ｄを挿入し、その後、Ｔ頭ボルト１７ａの頭部１７ｃが第２狭持部材１４の狭持鍔部１２ｃ，１２ｃ’の下面に接触するまで引き上げる。これにより、Ｔ頭ボルト１７ａの頭部１７ｃが第２狭持部材１４の凸部１２ｍよりも内径側に配置される。その後、Ｔ頭ボルト１７ａの軸部１７ｄの端部にナット１７ｂを上方から螺合させて緊締する。これにより、第１狭持部材１１及び第２狭持部材１４が近接するため、消火栓２のフランジ２ｄと流体管３の分岐部フランジ３ｃとが上下方向に狭持され、補修弁４のフランジ４ｃ，４ｄと、消火栓２のフランジ２ｄ及び流体管３の分岐部フランジ３ｃとのフランジ接合が補強される。尚、Ｔ頭ボルト１７ａの軸部１７ｄの端部に連結部材１７を構成するナット１７ｂを螺合、緊締させた際には、ナット１７ｂが第１狭持部材１１の凸部１２ｍよりも内径側に配置される。ここで、Ｔ頭ボルト１７ａとナット１７ｂとの挿入方向は上下逆でもよい。 Next, as shown in FIGS. 6A and 7, the narrow-holding collar portions 12c and 12c'of the first narrow-holding member 11 and the second narrow-holding collar portions 12c and 12c' corresponding to the upper and lower sides. The connecting member 17 is attached and connected to the narrow holding flange portions 12c and 12c'of the narrow holding member 14. Specifically, the T-head bolt 17a constituting the connecting member 17 is inserted from the upper opening of the valve casing 20 to the outer diameter side of the notch portion 12f of the pair of narrow holding flange portions 12c, 12c'corresponding to the upper and lower sides. At this time, the head 17c of the T head bolt 17a is inserted so as to be located on the lower side. Subsequently, the shaft portion 17d of the T-head bolt 17a is inserted from the outer diameter side to the inner diameter side of the notch portion 12f. At this time, the outer diameter of the notch 12f is in a state where the head 17c is positioned below the convex portion 12m so that the head 17c of the T-head bolt 17a does not interfere with the convex portion 12m of the second narrowing member 14. The shaft portion 17d of the T-head bolt 17a is inserted from the side to the inner diameter side, and then the head portion 17c of the T-head bolt 17a is pulled up until it comes into contact with the lower surfaces of the narrow-holding flange portions 12c and 12c'of the second narrow-holding member 14. .. As a result, the head portion 17c of the T-head bolt 17a is arranged on the inner diameter side of the convex portion 12m of the second narrowing member 14. After that, the nut 17b is screwed from above to the end of the shaft portion 17d of the T-head bolt 17a and tightened. As a result, since the first narrowing member 11 and the second narrowing member 14 are close to each other, the flange 2d of the fire hydrant 2 and the branch flange 3c of the fluid pipe 3 are narrowed in the vertical direction, and the flange 4c of the repair valve 4 is held. , 4d and the flange joint between the flange 2d of the fire hydrant 2 and the branch flange 3c of the fluid pipe 3 are reinforced. When the nut 17b constituting the connecting member 17 is screwed and tightened to the end of the shaft portion 17d of the T-head bolt 17a, the nut 17b is on the inner diameter side of the convex portion 12m of the first narrowing member 11. Placed in. Here, the insertion direction of the T-head bolt 17a and the nut 17b may be upside down.

また、第１狭持部材１１及び第２狭持部材１４の各本体部（各狭持部１２ａ，１２ａ’の基部、各連結アーム部１２ｂ及び各アーム部１２ｄ）は、消火栓２のフランジ２ｄの外周面及び流体管３の分岐部フランジ３ｃの外周面に当接するため、連結部材１７を緊締した際に第１狭持部材１１及び第２狭持部材１４に対し傾く方向に力が働いても、前記各本体部により第１狭持部材１１及び第２狭持部材１４の傾きが規制され、狭持部１２ａ，１２ａ’がフランジ２ｄの上面及び分岐部フランジ３ｃの下面に接触した状態を維持することができる。 Further, each main body portion (base portion of each narrow holding portion 12a, 12a', each connecting arm portion 12b and each arm portion 12d) of the first narrowing member 11 and the second narrowing member 14 is a flange 2d of the fire hydrant 2. Since the outer peripheral surface and the outer peripheral surface of the branch flange 3c of the fluid pipe 3 are in contact with each other, even if a force acts in a direction of tilting with respect to the first narrowing member 11 and the second narrowing member 14 when the connecting member 17 is tightened. The inclination of the first narrowing member 11 and the second narrowing member 14 is regulated by each of the main body portions, and the narrowed holding portions 12a and 12a'are maintained in contact with the upper surface of the flange 2d and the lower surface of the branch flange 3c. can do.

以上説明したように、本実施例のフランジ補強具１０は、連結部材１７がＴ頭ボルト１７ａ及びナット１７ｂを有し、第１狭持部材１１及び第２狭持部材１４の各狭持鍔部１２ｃ，１２ｃ’は、第１狭持部材１１及び第２狭持部材１４の外径側から内径側に向けてＴ頭ボルト１７ａの軸部１７ｄを挿通可能な切欠部１２ｆを有しているため、Ｔ頭ボルト１７ａの軸部１７ｄを切欠部１２ｆに対して外径側から内径側に向けて挿入することができ、Ｔ頭ボルト１７ａを上下方向に挿入する場合に比べ、挿入するストロークを小さくできるため、連結部材１７が周辺の流体管３の本管部や分岐首部３ｂ等に干渉することを抑制できる。したがって、補修弁４の周囲が狭いスペースであっても第１狭持部材１１及び第２狭持部材１４を連結部材１７により連結することができる。尚、第１狭持部材１１及び第２狭持部材１４の外径側から内径側に向けてＴ頭ボルト１７ａの軸部１７ｄを挿通可能な切欠部１２ｆを有していれば、連結部材１７は、管路軸方向（上下方向）とは直交または交差する方向に延び、管路軸方向と直交または交差する方向に連結するようになっていてもよい。 As described above, in the flange reinforcing tool 10 of the present embodiment, the connecting member 17 has a T-head bolt 17a and a nut 17b, and each of the narrow-holding flange portions of the first narrow-holding member 11 and the second narrow-holding member 14 is provided. Since 12c and 12c'have a notch portion 12f through which the shaft portion 17d of the T-head bolt 17a can be inserted from the outer diameter side to the inner diameter side of the first narrowing member 11 and the second narrowing member 14. , The shaft portion 17d of the T-head bolt 17a can be inserted from the outer diameter side to the inner diameter side with respect to the notch portion 12f, and the insertion stroke is smaller than when the T-head bolt 17a is inserted in the vertical direction. Therefore, it is possible to prevent the connecting member 17 from interfering with the main pipe portion, the branch neck portion 3b, or the like of the peripheral fluid pipe 3. Therefore, even if the space around the repair valve 4 is narrow, the first narrowing member 11 and the second narrowing member 14 can be connected by the connecting member 17. If the first narrowing member 11 and the second narrowing member 14 have a notch 12f through which the shaft portion 17d of the T-head bolt 17a can be inserted from the outer diameter side to the inner diameter side, the connecting member 17 May extend in a direction orthogonal to or intersecting the pipeline axial direction (vertical direction), and may be connected in a direction orthogonal to or intersecting the pipeline axial direction.

また、第１狭持部材１１及び第２狭持部材１４が、周方向に分割された複数の分割体１２，１２’，…と、分割体１２，１２’，…を結合する結合部材１８，１８，…と、を備え、結合部材１８，１８，…は、消火栓２及び分岐首部３ｂの接続方向である上下方向（管路構成部材の管路軸方向）に延びている。これによれば、結合部材１８，１８，…を上下方向に挿入して複数の分割体１２，１２’，…を結合することで、結合部材１８，１８，…の結合方向を連結部材１７，１７，…の結合方向と同じく上下方向とすることができる。すなわち、弁筐２０の上方の開口から下方に向けて連結部材１７及び結合部材１８，１８，…を挿入配置すればよいため、水平方向（管路構成部材の管路軸方向と直交する方向）に大きなスペースを必要とせず、例えば、容量が小さい弁筐２０内部のような補修弁４の周囲が狭いスペースであっても第１狭持部材１１及び第２狭持部材１４を組み立てることができる。 Further, the connecting member 18, in which the first narrowing member 11 and the second narrowing member 14 connect a plurality of divided bodies 12, 12', ... Divided in the circumferential direction and the divided bodies 12, 12', ... 18, ..., And the coupling members 18, 18, ... Extend in the vertical direction (the pipeline axial direction of the pipeline constituent member), which is the connection direction of the fire hydrant 2 and the branch neck portion 3b. According to this, by inserting the connecting members 18, 18, ... In the vertical direction and joining the plurality of divided bodies 12, 12', ..., the connecting direction of the connecting members 18, 18, ... Is changed to the connecting member 17, ... It can be in the vertical direction as in the bonding direction of 17, .... That is, since the connecting member 17 and the connecting members 18, 18, ... May be inserted and arranged downward from the upper opening of the valve casing 20, the horizontal direction (direction orthogonal to the pipeline axial direction of the pipeline constituent member). The first narrowing member 11 and the second narrowing member 14 can be assembled even if the circumference of the repair valve 4 is narrow, for example, inside the valve housing 20 having a small capacity. ..

また、第１狭持部材１１及び第２狭持部材１４は、周方向に延びて環状を成す本体部（各狭持部１２ａ，１２ａ’の基部、各連結アーム部１２ｂ及び各アーム部１２ｄ）と、結合部材１８，１８，…が挿通される結合部１２ｇ，１２ｐと、を有し、分割体１２の結合部１２ｇ，１２ｐは、隣接する分割体１２’の結合部１２ｇ，１２ｐと上下方向に重畳するように前記本体部の延長線上に設けられている。これによれば、結合部材１８が挿通される結合部１２ｇ，１２ｐが本体部の周方向の延長線上に設けられることから、結合部１２ｇ，１２ｐが本体部の外径側に設けられている形態に比べて、分割体１２，１２’同士の結合強度が高くなる。そのため、第１狭持部材１１及び第２狭持部材１４を構成する分割体１２，１２’が結合部１２ｇ，１２ｐの部分を中心に屈曲することを防止して、第１狭持部材１１及び第２狭持部材１４に対して連結部材１７の締結力を上下方向に効率よく伝えることができる。 Further, the first narrow-holding member 11 and the second narrow-holding member 14 extend in the circumferential direction to form an annular body (base of each narrow-holding portion 12a, 12a', each connecting arm portion 12b, and each arm portion 12d). And the connecting portions 12g, 12p through which the connecting members 18, 18, ... It is provided on the extension line of the main body so as to be superimposed on the main body. According to this, since the coupling portions 12g and 12p through which the coupling member 18 is inserted are provided on the extension line in the circumferential direction of the main body portion, the coupling portions 12g and 12p are provided on the outer diameter side of the main body portion. The bond strength between the divided bodies 12 and 12'is higher than that of the above. Therefore, the divided bodies 12, 12'constituting the first narrowing member 11 and the second narrowing member 14 are prevented from bending around the portions of the connecting portions 12g and 12p, and the first narrowing member 11 and the first narrowing member 11 and The fastening force of the connecting member 17 can be efficiently transmitted to the second narrowing member 14 in the vertical direction.

また、分割体１２，１２’は、一方の端部に第１結合部としての結合部１２ｐを備え、他方の端部に第２結合部としての結合部１２ｇを備えており、結合部１２ｐは、結合部１２ｇの緊締方向外側に重畳するようになっているため、分割体１２，１２’の結合部１２ｐにより分割体１２，１２’の結合部１２ｇに対して連結部材１７の締結力を効率よく伝えることができる。また、第１狭持部材１１及び第２狭持部材１４には、結合部１２ｇ，１２ｐが周方向にバランスよく配設されることとなるため、連結部材１７の締結力を周方向にバランスよく伝えることができる。更に、分割体１２，１２’を同一形状に形成することができるため、第１狭持部材１１及び第２狭持部材１４の構造を簡素化できる。 Further, the divided bodies 12 and 12'have a coupling portion 12p as a first coupling portion at one end and a coupling portion 12g as a second coupling portion at the other end, and the coupling portion 12p is provided. Since the coupling portion 12g is superimposed on the outside in the tightening direction, the coupling portion 12p of the split bodies 12 and 12'makes the fastening force of the connecting member 17 efficient with respect to the coupling portion 12g of the split bodies 12 and 12'. I can tell you well. Further, since the connecting portions 12g and 12p are arranged in the first narrowing member 11 and the second narrowing member 14 in a well-balanced manner in the circumferential direction, the fastening force of the connecting member 17 is well-balanced in the circumferential direction. I can tell. Further, since the divided bodies 12 and 12'can be formed into the same shape, the structures of the first narrowing member 11 and the second narrowing member 14 can be simplified.

また、分割体１２，１２’の結合部１２ｐは、連結部材１７が取付けられる狭持鍔部１２ｃ’の近傍に設けられている（図３参照）。これにより、連結部材１７の締結力を結合部１２ｐを介して結合部１２ｇに効率よく伝えることができる。言い換えれば、狭持鍔部１２ｃ’から離れた位置に結合部１２ｐを設けた場合に生じる連結部材１７の締結力が結合部１２ｐに対して分散して伝わる虞を回避できる。 Further, the connecting portion 12p of the divided bodies 12 and 12'is provided in the vicinity of the narrow holding flange portion 12c' to which the connecting member 17 is attached (see FIG. 3). As a result, the fastening force of the connecting member 17 can be efficiently transmitted to the connecting portion 12g via the connecting portion 12p. In other words, it is possible to avoid the possibility that the fastening force of the connecting member 17 generated when the connecting portion 12p is provided at a position away from the narrow holding flange portion 12c'is dispersed and transmitted to the connecting portion 12p.

また、第１狭持部材１１及び第２狭持部材１４において、結合部１２ｇ，１２ｐの各組の位置が周方向にずれて配置されている。これによれば、第１狭持部材１１及び第２狭持部材１４の各結合部１２ｇ，１２ｐの位置が周方向にずれて配置されていることにより、分割体１２，１２’同士の連結部分である結合部１２ｇ，１２ｐが連結部材１７の連結方向に重畳しないため、第１狭持部材１１及び第２狭持部材１４を連結部材１７で連結した際にかかる締結力に対する強度が高まるばかりか、それぞれの結合部材１８を容易に取付けできる。 Further, in the first narrow-holding member 11 and the second narrow-holding member 14, the positions of the respective sets of the connecting portions 12g and 12p are arranged so as to be offset in the circumferential direction. According to this, the positions of the connecting portions 12g and 12p of the first narrowing member 11 and the second narrowing member 14 are arranged so as to be offset in the circumferential direction, so that the connecting portions of the divided bodies 12 and 12'are connected to each other. Since the connecting portions 12g and 12p do not overlap with each other in the connecting direction of the connecting member 17, not only the strength against the fastening force applied when the first narrowing member 11 and the second narrowing member 14 are connected by the connecting member 17 is increased. , Each connecting member 18 can be easily attached.

また、各切欠部１２ｆの外径側端部には、凸部１２ｍが設けられている。言い換えれば、連結部材１７により第１狭持部材１１及び第２狭持部材１４を連結したときには、Ｔ頭ボルト１７ａの頭部１７ｃ及びナット１７ｂよりも外径側に凸部１２ｍが設けられるため、Ｔ頭ボルト１７ａの頭部１７ｃ及びナット１７ｂが外径側に移動したときに凸部１２ｍに干渉するようになっており、連結部材１７が切欠部１２ｆから離脱することを防止できる。更に、Ｔ頭ボルト１７ａの頭部１７ｃは凸部１２ｍにより回転が規制されるため、ナット１７ｂの螺合操作のみで連結部材１７による第１狭持部材１１及び第２狭持部材１４の締め付け作業を行うことができる。 Further, a convex portion 12m is provided at the outer diameter side end portion of each notch portion 12f. In other words, when the first narrowing member 11 and the second narrowing member 14 are connected by the connecting member 17, the convex portion 12m is provided on the outer diameter side of the head 17c and the nut 17b of the T head bolt 17a. When the head portion 17c and the nut 17b of the T-head bolt 17a move to the outer diameter side, they interfere with the convex portion 12m, and the connecting member 17 can be prevented from coming off from the notch portion 12f. Further, since the rotation of the head 17c of the T-head bolt 17a is restricted by the convex portion 12m, the tightening work of the first narrowing member 11 and the second narrowing member 14 by the connecting member 17 only by screwing the nut 17b. It can be performed.

また、第１狭持部材１１には、消火栓２のフランジ２ｄの上面に係止可能な突状部１２ｅ，１２ｅが設けられているため、突状部１２ｅ，１２ｅにより消火栓２のフランジ２ｄの上面に係止させて仮置きできるとともに、第２狭持部材１４には、補修弁４のフランジ４ｃの上面に係止可能な突状部１２ｊ，１２ｊが設けられているため、突状部１２ｊ，１２ｊにより第２狭持部材１４を補修弁４のフランジ４ｃの上面に係止させて仮置きできるようになっている。すなわち、第１狭持部材１１及び第２狭持部材１４を支える必要がないため、連結部材１７で第１狭持部材１１及び第２狭持部材１４を連結する作業が簡便である。また、分割体１２，１２’を消火栓２のフランジ２ｄ及び補修弁４のフランジ４ｃに仮置きした状態で、結合部材１８により第１狭持部材１１及び第２狭持部材１４を簡便に構成することができる。 Further, since the first narrowing member 11 is provided with the projecting portions 12e and 12e that can be locked to the upper surface of the flange 2d of the fire hydrant 2, the projecting portions 12e and 12e provide the upper surface of the flange 2d of the fire hydrant 2. Since the second narrowing member 14 is provided with the projecting portions 12j and 12j that can be locked on the upper surface of the flange 4c of the repair valve 4, the projecting portions 12j, The second narrowing member 14 is locked to the upper surface of the flange 4c of the repair valve 4 by 12j so that it can be temporarily placed. That is, since it is not necessary to support the first narrowing member 11 and the second narrowing member 14, it is easy to connect the first narrowing member 11 and the second narrowing member 14 with the connecting member 17. Further, in a state where the divided bodies 12 and 12'are temporarily placed on the flange 2d of the fire hydrant 2 and the flange 4c of the repair valve 4, the first narrowing member 11 and the second narrowing member 14 are easily configured by the coupling member 18. be able to.

また、第１狭持部材１１及び第２狭持部材１４における連結アーム部１２ｂとアーム部１２ｄは、周方向に上下交互に配置されている。更に、第１狭持部材１１及び第２狭持部材１４は、消火栓２のフランジ２ｄ及び流体管３の分岐部フランジ３ｃに対して取付けられた状態において、第１狭持部材１１の連結アーム部１２ｂと第２狭持部材１４のアーム部１２ｄとが上下方向に対応し、第１狭持部材１１のアーム部１２ｄと第２狭持部材１４の連結アーム部１２ｂとが上下方向に対応している。すなわち、上下に対応する第１狭持部材１１の連結アーム部１２ｂと第２狭持部材１４のアーム部１２ｄとの上下幅は小さくなっており（近接しており）、上下に対応する第１狭持部材１１のアーム部１２ｄと第２狭持部材１４の連結アーム部１２ｂとの上下幅は大きくなっている（離間している）。これによれば、上下幅が大きい第１狭持部材１１のアーム部１２ｄと第２狭持部材１４の連結アーム部１２ｂとの間を利用して、補修弁４の操作ハンドルＨを挿通できるため、フランジ補強具１０を取付けた状態で、操作ハンドルＨにより補修弁４を開閉操作できるようになっている（図７参照）。 Further, the connecting arm portions 12b and the arm portions 12d in the first narrowing member 11 and the second narrowing member 14 are arranged alternately up and down in the circumferential direction. Further, the first narrowing member 11 and the second narrowing member 14 are attached to the flange 2d of the fire hydrant 2 and the branch flange 3c of the fluid pipe 3, and the connecting arm portion of the first narrowing member 11 is attached. The 12b and the arm portion 12d of the second narrowing member 14 correspond in the vertical direction, and the arm portion 12d of the first narrowing member 11 and the connecting arm portion 12b of the second narrowing member 14 correspond in the vertical direction. There is. That is, the vertical width between the connecting arm portion 12b of the first narrowing member 11 corresponding to the top and bottom and the arm portion 12d of the second narrowing member 14 is small (close to each other), and the first one corresponding to the top and bottom. The vertical width between the arm portion 12d of the narrow holding member 11 and the connecting arm portion 12b of the second narrowing member 14 is large (separated). According to this, the operation handle H of the repair valve 4 can be inserted by utilizing between the arm portion 12d of the first narrowing member 11 having a large vertical width and the connecting arm portion 12b of the second narrowing member 14. With the flange reinforcing tool 10 attached, the repair valve 4 can be opened and closed by the operation handle H (see FIG. 7).

また、結合部材の変形例として次のようなものもある。図８に示されるように、フランジ補強具１００における結合部材１８０は、結合部１２ｇ，１２ｐに挿通される挿通部１８０ａと、挿通部１８０ａの軸部先端側に取付けられる抜止部材１８０ｂと、から主に構成されている。挿通部１８０ａの軸部先端側の外周面には、周方向に凹設される凹溝１８０ｃが設けられており、凹溝１８０ｃに抜止部材１８０ｂが取付けられている。抜止部材１８０ｂは、Ｃ字状に形成されて弾性を有しており、外周面が先端側（下側）に向けて先細りするテーパ形状を成している。 Further, there are the following modifications of the coupling member. As shown in FIG. 8, the coupling member 180 in the flange reinforcing tool 100 is mainly composed of an insertion portion 180a inserted into the coupling portions 12g and 12p and a retaining member 180b attached to the tip end side of the shaft portion of the insertion portion 180a. It is configured in. A concave groove 180c recessed in the circumferential direction is provided on the outer peripheral surface of the insertion portion 180a on the tip end side of the shaft portion, and the retaining member 180b is attached to the concave groove 180c. The retaining member 180b is formed in a C shape and has elasticity, and the outer peripheral surface has a tapered shape that tapers toward the tip side (lower side).

結合部材１８０により結合部１２ｇ，１２ｐを結合する際には、凹溝１８０ｃに抜止部材１８０ｂを取付けた状態で挿通部１８０ａを上側から挿入する。これによれば、結合部１２ｇ，１２ｐを通過するときに、抜止部材１８０ｂの外周面が結合部１２ｇ，１２ｐの内周面に接触し、抜止部材１８０ｂが凹溝１８０ｃ内で縮径することにより結合部１２ｇ，１２ｐを通過可能となっている。また、抜止部材１８０ｂの外周面は、テーパ形状となっているため、結合部１２ｇ，１２ｐ内に円滑に挿入できる。抜止部材１８０ｂが結合部１２ｇ，１２ｐを通過すると、抜止部材１８０ｂが弾性復元力により拡径し、結合部１２ｇの下面側外縁に係止されるため、挿通部１８０ａの抜け止めがされる。このように、挿通部１８０ａを結合部１２ｇ，１２ｐに管路軸方向に挿入するだけで結合部材１８０による分割体１２，１２’の結合を簡便に行える。 When the coupling portions 12g and 12p are coupled by the coupling member 180, the insertion portion 180a is inserted from above with the retaining member 180b attached to the concave groove 180c. According to this, when passing through the coupling portions 12g and 12p, the outer peripheral surface of the retaining member 180b comes into contact with the inner peripheral surface of the coupling portions 12g and 12p, and the retaining member 180b is reduced in diameter in the concave groove 180c. It is possible to pass through the connecting portions 12g and 12p. Further, since the outer peripheral surface of the retaining member 180b has a tapered shape, it can be smoothly inserted into the joint portions 12g and 12p. When the retaining member 180b passes through the coupling portions 12g and 12p, the retaining member 180b expands in diameter due to the elastic restoring force and is locked to the outer edge on the lower surface side of the coupling portion 12g, so that the insertion portion 180a is prevented from disconnecting. In this way, the divided bodies 12 and 12'can be easily coupled by the coupling member 180 simply by inserting the insertion portion 180a into the coupling portions 12g and 12p in the direction of the pipeline axis.

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 examples of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these examples, and any changes or additions that do not deviate from the gist of the present invention are included in the present invention. Will be.

例えば、前記実施例では、第１狭持部材１１及び第２狭持部材１４が分割体１２，１２’の結合により、平面視において円環状を成す形態を例示したが、例えば、平面視において無端状であれば、楕円形や小判形、矩形などの非円形形状であってもよい。 For example, in the above embodiment, the first narrowing member 11 and the second narrowing member 14 form an annular shape in a plan view by connecting the divided bodies 12 and 12', but for example, there is no end in the plan view. If it is a shape, it may be a non-circular shape such as an ellipse, an oval, or a rectangle.

また、前記実施例では、第１狭持部材１１及び第２狭持部材１４は、連結部材１７を挿入する狭持鍔部１２ｃ、１２ｃ’が設けられた各分割体１２，１２’により構成される形態を例示したが、狭持鍔部１２ｃ、１２ｃ’が設けられる分割体と、狭持鍔部１２ｃ、１２ｃ’が設けられていない分割体と、から構成されていてもよい。この場合、狭持鍔部１２ｃ、１２ｃ’が設けられる分割体に第１結合部を設け、狭持鍔部１２ｃ、１２ｃ’が設けられていない分割体に第２結合部を設ければよい。 Further, in the above embodiment, the first narrow-holding member 11 and the second narrow-holding member 14 are composed of the divided bodies 12 and 12'provided with the narrow-holding flange portions 12c and 12c'in which the connecting member 17 is inserted. Although the above-mentioned form is illustrated, it may be composed of a divided body provided with the narrow holding flange portions 12c and 12c'and a divided body not provided with the narrow holding flange portions 12c and 12c'. In this case, the first joint portion may be provided in the divided body provided with the narrow holding flange portions 12c and 12c', and the second joint portion may be provided in the divided body not provided with the narrow holding flange portions 12c and 12c'.

また、前記実施例では、管路構成部材である消火栓２、流体管３の分岐首部３ｂ、接続部材である補修弁４が上下方向に接続される形態を例示したが、管路構成部材の管路軸方向はこれに限られず、水平方向、または斜め方向に接続されていてもよい。 Further, in the above embodiment, the embodiment in which the fire extinguishing plug 2 which is a pipeline constituent member, the branch neck portion 3b of the fluid pipe 3, and the repair valve 4 which is a connecting member are connected in the vertical direction is exemplified. The road axis direction is not limited to this, and may be connected horizontally or diagonally.

また、前記実施例では、補修弁４を接続部材とし、流体管３の分岐首部３ｂ及び消火栓２を管路構成部材として説明したが、管路構成部材の間に接続部材がフランジ接続されていれば、接続部材及び管路構成部材は自由に変更できる。また、補修弁４は、操作ハンドルＨを備えるレバー式としたが、キャップ式でもよい。 Further, in the above embodiment, the repair valve 4 is used as a connecting member, and the branch neck portion 3b of the fluid pipe 3 and the fire hydrant 2 are described as a pipeline constituent member. For example, the connecting member and the pipeline constituent member can be freely changed. Further, although the repair valve 4 is a lever type provided with an operation handle H, it may be a cap type.

２消火栓（管路構成部材）
２ｄフランジ
３流体管（管路構成部材）
３ｂ分岐首部
３ｃ分岐部フランジ
４補修弁（接続部材）
４ｃ，４ｄフランジ
１０フランジ補強具
１１第１狭持部材（狭持部材）
１２，１２’ 分割体
１２ａ，１２ａ’ 狭持部（係止部）
１２ｂ連結アーム部（本体部）
１２ｃ，１２ｃ’ 狭持鍔部
１２ｄアーム部（本体部）
１２ｅ突状部
１２ｆ切欠部
１２ｇ結合部（第２結合部）
１２ｊ突状部（係止部）
１２ｍ凸部（規制部）
１２ｐ結合部（第１結合部）
１４第２狭持部材（狭持部材）
１７連結部材
１７ａＴ頭ボルト
１７ｂナット
１７ｃ頭部
１７ｄ軸部
１８結合部材
１８ａボルト
１８ｂナット
２０弁筐
１００フランジ補強具
１８０結合部材
１８０ａ挿通部
１８０ｂ抜止部材
１８０ｃ凹溝 2 Fire hydrant (pipeline component)
2d Flange 3 Fluid pipe (pipeline component)
3b Branch neck 3c Branch flange 4 Repair valve (connecting member)
4c, 4d Flange 10 Flange reinforcement 11 First narrow holding member (narrow holding member)
12, 12'Divided body 12a, 12a' Narrowing part (locking part)
12b Connecting arm part (main body part)
12c, 12c'Narrow collar part 12d Arm part (main body part)
12e Protruding part 12f Notch part 12g Joint part (second joint part)
12j protruding part (locking part)
12m convex part (regulatory part)
12p joint (first joint)
14 Second narrow holding member (narrow holding member)
17 Connecting member 17a T-head bolt 17b Nut 17c Head 17d Shaft 18 Coupling member 18a Bolt 18b Nut 20 Valve housing 100 Flange reinforcement 180 Coupling member 180a Insertion part 180b Detachment member 180c Recessed groove

Claims

Both flanges of the pipeline constituent member to be joined to both flanges of the connecting member having flanges at both ends are sandwiched by a pair of annular holding members, and the pair of sandwiching members are held by the connecting member in the pipeline. It is a flange reinforcing tool that reinforces the flange joint by connecting the components in the direction of the pipeline axis.
The connecting member is a bolt and a nut that connect the pair of holding members, and the holding member is a notch through which the shaft portion of the bolt can be inserted from the outer diameter side to the inner diameter side of the holding member. The narrowing member includes a plurality of divided bodies divided in the circumferential direction and a connecting member for joining the plurality of divided bodies.
At least one of the pair of holding members has a flange provided with a locking portion that can be locked on the upper surface of the flange joining portion between the connecting member and the pipeline constituent member. Reinforcing tool.

The upper holding member of the pair of holding members is provided with the locking portion that can be locked on the upper surface of the flange joint portion of the pipeline constituent member, and the lower holding member of the pair of holding members is held. The flange reinforcing tool according to claim 1, wherein the member is provided with the locking portion that can be locked on the upper surface of the flange joint portion of the connecting member.

The flange reinforcing tool according to claim 1 or 2, wherein each of the pair of holding members is provided with the locking portions on the upper and lower sides of the holding member.

The flange reinforcing tool according to any one of claims 1 to 3, wherein a plurality of the locking portions are provided in the circumferential direction of the holding member.

The flange reinforcing tool according to any one of claims 1 to 4, wherein the locking portion is provided at substantially the same position in the circumferential direction as the notch portion.