JP7123325B2 - Joint reinforcement structure - Google Patents

Joint reinforcement structure Download PDF

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Publication number
JP7123325B2
JP7123325B2 JP2021104897A JP2021104897A JP7123325B2 JP 7123325 B2 JP7123325 B2 JP 7123325B2 JP 2021104897 A JP2021104897 A JP 2021104897A JP 2021104897 A JP2021104897 A JP 2021104897A JP 7123325 B2 JP7123325 B2 JP 7123325B2
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flange
flange portion
pressing
reinforcing
reinforcing jig
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JP2021181829A (en
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信夫 宗友
光信 矢野
忍 安井
尚毅 海道
篤史 酒井
充弘 森
大介 酒井
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Taisei Kiko Co Ltd
Okayama City Office
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Taisei Kiko Co Ltd
Okayama City Office
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Priority claimed from JP2020127572A external-priority patent/JP6910612B2/en
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Priority to JP2021104897A priority Critical patent/JP7123325B2/en
Publication of JP2021181829A publication Critical patent/JP2021181829A/en
Priority to JP2022119753A priority patent/JP7355898B2/en
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Publication of JP7123325B2 publication Critical patent/JP7123325B2/en
Priority to JP2023152524A priority patent/JP7528330B2/en
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Description

本発明は、両筒状部材の端部から径外方向に突出したフランジ部どうしの接合部を補強する補強治具を備えた接合部補強構造に関する。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint reinforcement structure provided with a reinforcing jig for reinforcing a joint between flanges projecting radially outward from the ends of both cylindrical members.

上記補強治具として、例えば特許文献１には、一対のフランジ接合部に各別に当接する押圧部を備えた一対の挟持部材と、両挟持部材を接合部の接合方向に引き寄せて固定する締結機構とを備えた構成が開示されている。 As the reinforcing jig, for example, Patent Document 1 discloses a pair of clamping members each having a pressing portion that abuts on a pair of flange joints, and a fastening mechanism that draws and fixes both clamping members in the joining direction of the joints. is disclosed.

また、一方の挟持部材には、両フランジ部を連結する連結ボルトの頭部またはナットに対して、径内方向から当接するＣ字状の脱落防止腕が形成されている。この脱落防止腕によって、補強治具が両フランジ部から脱落するのが防止される。 Also, one holding member is formed with a C-shaped drop-off prevention arm that abuts from the radially inner direction on the head or nut of the connecting bolt that connects the two flange portions. The drop-off preventing arm prevents the reinforcing jig from dropping off from both flange portions.

特開２０１４－１４１９９５号公報JP 2014-141995 A

ところで、補修弁は、弁体を弁箱に収容した後、弁体の抜け出しを防止する短管を弁箱にボルトで固定しており、この固定部位が、弁箱や短管から径外方向に膨出する膨出部を形成していることがある。この場合、短管等のフランジ部に存在する連結ボルトの頭部等と前記膨出部との周方向の間隔が狭く、該間隔に補強治具の押圧部を十分挿入できない。
その結果、補強治具の両フランジ部の外周面と対向する部位が、両フランジ部から大きく離間してしまい補強治具が脱落するおそれがある。しかも、この離間に起因して、両挟持部材をボルト等で締結する際、両挟持部材が共回りして位置ズレし易く、所望の押圧力を発揮し難い。 By the way, in the repair valve, after the valve body is accommodated in the valve body, a short pipe that prevents the valve body from coming off is fixed to the valve body with bolts. There may be formed a bulging portion that bulges out. In this case, the gap in the circumferential direction between the heads of the connecting bolts and the bulging portion present in the flange portion of the short pipe or the like is narrow, and the pressing portion of the reinforcing jig cannot be sufficiently inserted into the gap.
As a result, the portions of the reinforcing jig that face the outer peripheral surfaces of both flange portions are greatly separated from the flange portions, and there is a risk that the reinforcing jig will fall off. Moreover, due to this separation, when both clamping members are fastened with bolts or the like, both clamping members tend to rotate together and are easily misaligned, making it difficult to exert a desired pressing force.

また、補修弁は、径寸法をコンパクトにするために、両フランジ部に配置される連結ボルトの頭部等より径内側部位の空間が狭隘であることが多く、脱落防止腕を連結ボルトの頭部等に引っ掛けることができない。このため、補強治具に予期せぬ外力が付与された場合、補強治具が脱落するおそれがある。その上、補修弁には、弁体を開閉操作する操作ハンドルが径外方向に形成されており、補強治具の取付位置が制限される場合がある。 In addition, in order to make the diameter of the repair valve compact, it is often the case that the space inside the diameter of the connecting bolt head is narrower than the head of the connecting bolt placed on both flanges. It cannot be hooked to the department. Therefore, when an unexpected external force is applied to the reinforcing jig, the reinforcing jig may fall off. In addition, since the repair valve has an operation handle for opening and closing the valve body, the operation handle is formed radially outward, which may limit the mounting position of the reinforcing jig.

そこで、本発明は、フランジ接合部を確実に補強することのできる接合部補強構造を合理的に構成することを目的とする。 SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to rationally construct a joint reinforcement structure capable of reliably reinforcing a flange joint.

本発明に係る接合部補強構造の特徴構成は、第一筒状部材の端部から径外方向に突出した第一フランジ部と第二筒状部材の端部から径外方向に突出した第二フランジ部とを連結ボルトで接合した接合部を補強する接合部補強構造において、前記第一フランジ部の外側面を押圧する第一押圧部と、前記第二フランジ部の外側面を押圧する第二押圧部と、を含む補強治具と、複数の前記補強治具を前記第一フランジ部及び前記第二フランジ部に向かって径方向内側に押圧する環状の保持部材と、を備え、前記第一筒状部材には、複数の前記連結ボルトの中心を前記第一筒状部材の周方向に結んだセンターラインよりも径外方向に突出するように複数の前記連結ボルトの間の位置で筒本体から膨出した膨出部が形成されており、少なくとも１つの前記補強治具は、前記第一フランジ部および前記第二フランジ部の接合方向視において前記第一押圧部が前記膨出部における前記周方向に沿った側方領域を押圧するように前記接合部に装着されている点にある。 The characteristic configuration of the joint reinforcement structure according to the present invention includes a first flange portion projecting radially outward from the end portion of the first tubular member and a second flange portion projecting radially outward from the end portion of the second tubular member. In the joint reinforcement structure for reinforcing the joint where the flange is joined with a connecting bolt, a first pressing part that presses the outer surface of the first flange and a second pressing part that presses the outer surface of the second flange a reinforcing jig including a pressing portion; and an annular holding member that presses the plurality of reinforcing jigs radially inward toward the first flange portion and the second flange portion; The cylindrical member has a cylindrical body at a position between the connecting bolts so as to protrude radially outward from a center line connecting the centers of the connecting bolts in the circumferential direction of the first cylindrical member. At least one of the reinforcing jigs has a bulging portion that bulges out from the bulging portion, and the first pressing portion is located at the bulging portion in the joining direction view of the first flange portion and the second flange portion. It is in that it is attached to the joint portion so as to press the side region along the circumferential direction.

本構成によると、第一押圧部が第一筒状部材の膨出部の側方領域を押圧するように補強治具が接合部に装着されているので、フランジ接合部の補強が確実なものとなる。また、環状の保持部材が複数の補強治具を第一フランジ部及び第二フランジ部に向かって径方向内側に押圧するので、補強治具の固定姿勢を長期に亘って維持することができる。 According to this configuration, since the reinforcing jig is attached to the joint portion so that the first pressing portion presses the lateral region of the bulging portion of the first cylindrical member, the reinforcement of the flange joint portion is assured. becomes. Further, since the annular holding member presses the plurality of reinforcing jigs radially inward toward the first flange portion and the second flange portion, the fixing posture of the reinforcing jigs can be maintained for a long period of time.

他の特徴構成は、前記補強治具において、前記第一筒状部材および前記第二筒状部材の少なくとも一方と当接可能な当接部が形成されており、前記当接部は、前記補強治具のうち、前記第一フランジ部および前記第二フランジ部の少なくとも一方の外周面と対向する内表面の前記周方向に沿った少なくとも一方の端部に、径内方向に突出して形成され、前記第一フランジ部および前記第二フランジ部の少なくとも一方と当接する点にある。 Another characteristic configuration is that in the reinforcing jig, a contact portion that can contact at least one of the first tubular member and the second tubular member is formed, and the contact portion protruding radially inward from at least one end along the circumferential direction of the inner surface facing the outer peripheral surface of at least one of the first flange portion and the second flange portion of the jig, It is in contact with at least one of the first flange portion and the second flange portion.

本構成によると、補強治具が回転しようとしても、当接部が第一フランジ部および第二フランジ部の少なくとも一方に当接して、回転が阻止される。その結果、補強治具が適切な位置に装着されるので、所望の押圧力を発揮することができる。また、当接部は、補強治具の内表面の端部に、径内方向に突出して形成されるといった簡便な構成であるので、加工が容易である。 According to this configuration, even if the reinforcing jig tries to rotate, the contact portion contacts at least one of the first flange portion and the second flange portion, and the rotation is prevented. As a result, the reinforcing jig is mounted at an appropriate position, and a desired pressing force can be exerted. Moreover, since the abutting portion has a simple structure in which it is formed at the end portion of the inner surface of the reinforcing jig so as to protrude radially inward, it is easy to process.

他の特徴構成に係る前記補強治具は、前記第一押圧部を含む第一挟持部材と、前記第二押圧部を含む第二挟持部材と、前記第一挟持部材と前記第二挟持部材とを、前記第一フランジ部および前記第二フランジ部の接合方向に近接させて固定する締結機構と、を有している点にある。 The reinforcing jig according to another characteristic configuration includes a first clamping member including the first pressing portion, a second clamping member including the second pressing portion, the first clamping member, and the second clamping member. and a fastening mechanism for fixing the first flange portion and the second flange portion close to each other in the joining direction of the first flange portion and the second flange portion.

他の特徴構成に係る前記第一挟持部材は、前記膨出部の前記周方向に沿った両側の領域を押圧する二つの前記第一押圧部を有している点にある。 The first holding member according to another characteristic configuration has two first pressing portions that press regions on both sides of the bulging portion along the circumferential direction.

筒状部材の分解斜視図である。4 is an exploded perspective view of a tubular member; FIG. 筒状部材のフランジ部に補強治具を取り付けた状態を示す縦断面図である。FIG. 4 is a vertical cross-sectional view showing a state in which a reinforcing jig is attached to the flange portion of the tubular member; 図２のIII－III矢視図である。FIG. 3 is a view taken along line III-III in FIG. 2; 図２のIV－IV矢視図である。FIG. 3 is a view taken along line IV-IV in FIG. 2; 図２のV－V矢視図である。FIG. 3 is a view taken along line VV in FIG. 2; 図２のVI－VI矢視図である。FIG. 3 is a view taken along line VI-VI of FIG. 2; 第一挟持部材の概略構成を示す図である。It is a figure which shows schematic structure of a 1st clamping member. 第二挟持部材の概略構成を示す図である。It is a figure which shows schematic structure of a 2nd clamping member. 補強治具の装着状態を示す斜視図である。It is a perspective view which shows the mounting state of a reinforcing jig. 補強治具の装着状態を示す斜視図である。It is a perspective view which shows the mounting state of a reinforcing jig. 別実施形態１に係る補強治具の斜視図である。FIG. 8 is a perspective view of a reinforcing jig according to another embodiment 1; 別実施形態２に係る補強治具の斜視図である。FIG. 11 is a perspective view of a reinforcing jig according to another embodiment 2;

以下に、本発明に係る接合部の補強治具の実施形態について、図面に基づいて説明する。本実施形態では、補強治具Ｐの一例として、補修弁Ｘ（第一筒状部材または第二筒状部材の一例）と、空気弁Ｌ（第一筒状部材の一例）または分岐管Ｍ（第二筒状部材の一例）とのフランジ接合部を補強する場合を説明する。ただし、以下の実施形態に限定されることなく、その要旨を逸脱しない範囲内で種々の変形が可能である。 EMBODIMENT OF THE INVENTION Below, embodiment of the reinforcement jig|tool of the joint part which concerns on this invention is described based on drawing. In this embodiment, as an example of the reinforcing jig P, the repair valve X (an example of the first tubular member or the second tubular member), the air valve L (an example of the first tubular member) or the branch pipe M ( An example of the second cylindrical member) will be described in the case of reinforcing the flange joint portion. However, without being limited to the following embodiments, various modifications are possible without departing from the scope of the invention.

図１には、補修弁Ｘの分解斜視図が示され、図２には、補修弁Ｘと空気弁Ｌおよび分岐管Ｍとが接合された状態である縦断面図が示される。図１に示すように、補修弁Ｘは、弁体（不図示）を収容する鋳鉄製の弁箱Ｘａと鋳鉄製の短管Ｘｂとを備えている。弁箱Ｘａに弁体を収容した後、弁箱Ｘａと短管Ｘｂとが埋込ボルト４で接合される。短管Ｘｂには、接合方向（軸方向）に貫通する複数の貫通孔３ａ（本実施形態では４箇所）が周方向に形成され、埋込ボルト４の頭部４ａを収容する溝部３ｄが形成されている。また、弁箱Ｘａには、一端が閉塞された孔部３ｂが（本実施形態では４箇所）が周方向に形成されている。孔部３ｂの内周面には雌ネジ部３ｃが形成されており、孔部３ｂの閉塞端面まで埋込ボルト４の雄ネジ部を螺合することで、弁箱Ｘａと短管Ｘｂとが接合される。 FIG. 1 shows an exploded perspective view of the repair valve X, and FIG. 2 shows a vertical cross-sectional view of the repair valve X, the air valve L, and the branch pipe M joined together. As shown in FIG. 1, the repair valve X includes a cast-iron valve body Xa containing a valve body (not shown) and a cast-iron short pipe Xb. After the valve body is accommodated in the valve body Xa, the valve body Xa and the short pipe Xb are joined with the embedded bolts 4 . A plurality of through holes 3a (four in this embodiment) are formed in the short pipe Xb in the joining direction (axial direction), and a groove portion 3d for accommodating the head portion 4a of the embedded bolt 4 is formed. It is Further, the valve box Xa is formed with holes 3b (four holes in this embodiment) whose one ends are closed in the circumferential direction. A female screw portion 3c is formed on the inner peripheral surface of the hole portion 3b, and by screwing the male screw portion of the embedded bolt 4 to the closed end surface of the hole portion 3b, the valve body Xa and the short pipe Xb are connected. spliced.

その結果、図５に示すように、補修弁Ｘから径外方向に膨出する複数の膨出部１ｂ（本実施形態では、４箇所）が、周方向に形成されている。なお、本実施形態における埋込ボルト４は、六角穴を形成した円形状の頭部４ａを有する六角穴付きボルトの例を示しているが、例えば、両ネジボルトをナットで締め付ける構成としても良く、特に限定されない。 As a result, as shown in FIG. 5, a plurality of bulging portions 1b (four in this embodiment) bulging radially outward from the repair valve X are formed in the circumferential direction. The embedded bolt 4 in this embodiment is an example of a hexagon socket head bolt having a circular head 4a with a hexagon socket. It is not particularly limited.

図１～図２に示すように、補修弁Ｘの一端には、シール部材２１を介在させた状態で空気弁Ｌや消火栓などが取付けられ、補修弁Ｘの他端には、シール部材２２を介在させた状態で水道管の分岐管Ｍなどが取付けられる。補修弁Ｘの一端には、円盤状のフランジ部１Ａ（第二フランジ部の一例、以下「第二フランジ部１Ａ」と称する。）が径外方向に突出形成され、この第二フランジ部１Ａが、空気弁Ｌの端部から径外方向に突出した円盤状のフランジ部Ｌａ（第一フランジ部の一例、以下「第一フランジ部Ｌａ」と称する。）と連結ボルト７で接合される。一方、補修弁Ｘの他端には、円盤状のフランジ部１Ｂ（第一フランジ部の一例、以下「第一フランジ部１Ｂ」と称する。）が径外方向に突出形成され、この第一フランジ部１Ｂが、分岐管Ｍの端部から径外方向に突出した円盤状のフランジ部Ｍａ（第二フランジ部の一例、以下「第二フランジ部Ｍａ」と称する。）と連結ボルト７で接合される。 As shown in FIGS. 1 and 2, an air valve L, a fire hydrant, or the like is attached to one end of the repair valve X with a seal member 21 interposed therebetween, and a seal member 22 is attached to the other end of the repair valve X. A branch pipe M or the like of a water pipe is attached in the interposed state. At one end of the repair valve X, a disk-shaped flange portion 1A (an example of a second flange portion, hereinafter referred to as "second flange portion 1A") is formed to protrude radially outward. , and a disc-shaped flange portion La (an example of a first flange portion, hereinafter referred to as “first flange portion La”) projecting radially outward from the end portion of the air valve L, and a connecting bolt 7 . On the other hand, at the other end of the repair valve X, a disk-shaped flange portion 1B (an example of a first flange portion, hereinafter referred to as "first flange portion 1B") is formed so as to protrude radially outward. The portion 1B is joined by a connecting bolt 7 to a disc-shaped flange portion Ma (an example of a second flange portion, hereinafter referred to as a “second flange portion Ma”) projecting radially outward from the end portion of the branch pipe M. be.

補修弁Ｘの両フランジ部１Ａ，１Ｂには、接合方向に貫通する複数の貫通孔１ａ，１ａ（本実施形態では、４箇所ずつ）が周方向で等間隔に形成され、空気弁Ｌの第一フランジ部Ｌａや分岐管Ｍの第二フランジ部Ｍａには、夫々、接合方向に貫通する複数の貫通孔２ａ，２ｂ（本実施形態では、４箇所ずつ）が周方向で等間隔に形成されている。補修弁Ｘの両フランジ部１Ａ，１Ｂの貫通孔１ａ，１ａと空気弁Ｌの第一フランジ部Ｌａや分岐管Ｍの第二フランジ部Ｍａの貫通孔２ａ，２ｂとを重ね合わせた状態で、連結ボルト７を用いて接合される。なお、本実施形態では、４箇所の貫通孔に連結ボルト７を接合する例を示しているが、フランジ接合部の外径に応じて６箇所や８箇所等の貫通孔が形成されるものであり、特に限定されない。 Both flange portions 1A and 1B of the repair valve X are formed with a plurality of through holes 1a and 1a (four holes each in this embodiment) penetrating in the joining direction at equal intervals in the circumferential direction. A plurality of through holes 2a and 2b (in this embodiment, four holes each) penetrating in the joining direction are formed in the first flange portion La and the second flange portion Ma of the branch pipe M at equal intervals in the circumferential direction. ing. With the through holes 1a, 1a of both flange portions 1A, 1B of the repair valve X and the through holes 2a, 2b of the first flange portion La of the air valve L and the second flange portion Ma of the branch pipe M overlapping, They are joined using connecting bolts 7 . In this embodiment, an example in which the connecting bolts 7 are joined to the four through holes is shown, but six or eight through holes may be formed according to the outer diameter of the flange joining portion. Yes, but not particularly limited.

連結ボルト７は、第一連結ボルト７Ａと第二連結ボルト７Ｂとで構成されている。第一連結ボルト７Ａは、多角形状（本実施形態では六角形）の頭部７１ａおよび雄ねじ部を有するボルト部７１と、多角形状（本実施形態では六角形）の第一ナット７２とを備えている。また、第二連結ボルト７Ｂは、ボルト部７１と、第一ナット７２より嵩高い多角形状（本実施形態では六角形）の第二ナット７３とを備えている。詳細は後述するが、連結ボルト７を挟んで補強治具Ｐを接合する箇所は、第二連結ボルト７Ｂを用いている。なお、第一連結ボルト７Ａと第二連結ボルト７Ｂとは、夫々同じ規格で構成しても良いし、夫々のボルト部７１を別規格で構成しても良い。また、ボルト部７１の頭部７１ａやナット７２，７３を円形状に構成しても良いし、ボルト・ナット構造に代えて、埋込式のボルト構造にしても良く特に限定されない。 The connecting bolt 7 is composed of a first connecting bolt 7A and a second connecting bolt 7B. The first connecting bolt 7A includes a bolt portion 71 having a polygonal (hexagonal in this embodiment) head 71a and a male threaded portion, and a polygonal (hexagonal in this embodiment) first nut 72. there is The second connecting bolt 7</b>B includes a bolt portion 71 and a polygonal (hexagonal in this embodiment) second nut 73 that is bulkier than the first nut 72 . Although the details will be described later, a second connecting bolt 7B is used at a location where the reinforcing jig P is joined with the connecting bolt 7 interposed therebetween. In addition, the first connecting bolt 7A and the second connecting bolt 7B may be configured with the same standard, respectively, or the respective bolt portions 71 may be configured with different standards. Moreover, the head 71a of the bolt portion 71 and the nuts 72 and 73 may be formed in a circular shape, and instead of the bolt/nut structure, an embedded bolt structure may be used without any particular limitation.

以下、補修弁Ｘの両フランジ部１Ａ，１Ｂにおいて、空気弁Ｌの第一フランジ部Ｌａや分岐管Ｍの第二フランジ部Ｍａに対向する接合面とは反対側で露出する面を外側面１ｃ，１ｄとし、両フランジ部１Ａ，１Ｂの径方向外側の面を外周面１ｅ，１ｆとして説明する。同様に、空気弁Ｌの第一フランジ部Ｌａにおいて、補修弁Ｘの第二フランジ部１Ａに対向する接合面とは反対側で露出する面を外側面２ｃ、径方向外側の面を外周面２ｅとし、分岐管Ｍの第二フランジ部Ｍａにおいて、補修弁Ｘの第一フランジ部１Ｂに対向する接合面とは反対側で露出する面を外側面２ｄ、径方向外側の面を外周面２ｆとして説明する。 Hereinafter, in both flange portions 1A and 1B of the repair valve X, the surface exposed on the opposite side of the joint surface facing the first flange portion La of the air valve L and the second flange portion Ma of the branch pipe M will be referred to as the outer surface 1c. , 1d, and radial outer surfaces of the flange portions 1A, 1B are defined as outer peripheral surfaces 1e, 1f. Similarly, in the first flange portion La of the air valve L, the surface exposed on the side opposite to the joint surface facing the second flange portion 1A of the repair valve X is the outer surface 2c, and the radially outer surface is the outer peripheral surface 2e. In the second flange portion Ma of the branch pipe M, the surface exposed on the opposite side of the joint surface facing the first flange portion 1B of the repair valve X is the outer surface 2d, and the radially outer surface is the outer peripheral surface 2f. explain.

[空気弁Ｌと補修弁Ｘとの接合部]
図２～図４および図７～図９を用いて、空気弁Ｌと補修弁Ｘとのフランジ接合部における補強治具Ｐについて説明する。ここで、空気弁Ｌと補修弁Ｘとの関係では、空気弁Ｌを第一筒状部材、補修弁Ｘを第二筒状部材として説明する。図２に示すように、補強治具Ｐは、第一フランジ部Ｌａと第二フランジ部１Ａとの接合部に装着される。 [Junction between air valve L and repair valve X]
2 to 4 and 7 to 9, the reinforcing jig P at the flange joint portion between the air valve L and the repair valve X will be described. Here, regarding the relationship between the air valve L and the repair valve X, the air valve L will be described as the first cylindrical member, and the repair valve X will be described as the second cylindrical member. As shown in FIG. 2, the reinforcing jig P is attached to the joint between the first flange portion La and the second flange portion 1A.

図３～図４に示すように、補強治具Ｐは、第二連結ボルト７Ｂの第二ナット７３が配置される第一フランジ部Ｌａの外側面２ｃにおいて、第二ナット７３の両側領域を押圧する二つの押圧部６Ｂ，６Ｂ（第一押圧部の一例、以下「第一押圧部６Ｂ」と称する。）を備えた第一挟持部材６と、第二フランジ部１Ａの外側面１ｃを押圧する二つの押圧部５Ｃ，５Ｃ（第二押圧部の一例、以下「第二押圧部５Ｃ」と称する。）を備えた第二挟持部材５と、を備えている。また、これら第一挟持部材６および第二挟持部材５を、両フランジ部Ｌａ，１Ａの接合方向に引き寄せて（近接させて）締付固定する締結機構８を備えている。これら押圧部６Ｂ，５Ｃの両フランジ部Ｌａ，１Ａに対向する押圧面６ｅ，５ｅには、例えば、押圧面６ｅ，５ｅに細かな凹凸を形成するなど、両フランジ部Ｌａ，１Ａの外側面２ｃ，１ｃに対して摩擦抵抗が生じるように摩擦加工が施されていても良い。 As shown in FIGS. 3 and 4, the reinforcing jig P presses both side regions of the second nut 73 on the outer surface 2c of the first flange portion La on which the second nut 73 of the second connecting bolt 7B is arranged. The first holding member 6 having two pressing portions 6B, 6B (an example of the first pressing portion, hereinafter referred to as the "first pressing portion 6B") presses the outer surface 1c of the second flange portion 1A. A second holding member 5 having two pressing portions 5C, 5C (an example of the second pressing portion, hereinafter referred to as “second pressing portion 5C”). Further, a fastening mechanism 8 is provided for tightening and fixing the first clamping member 6 and the second clamping member 5 by drawing them in the joining direction of the two flange portions La and 1A (bringing them closer together). The pressing surfaces 6e, 5e of the pressing portions 6B, 5C opposed to both the flange portions La, 1A are, for example, formed with fine unevenness on the pressing surfaces 6e, 5e. , 1c may be friction-processed so as to generate frictional resistance.

図７に示すように、第一挟持部材６は、金属部材により構成され、被挿入部６Ａと第一押圧部６Ｂとを一体的に備えている。被挿入部６Ａは、横断面視（接合方向と垂直な断面視）において、外面６ａおよび内面６ｂが第一フランジ部Ｌａに近付くほど拡径する台形状を呈した有底角筒状で形成されている（図７（ｃ）の底面視である図７（ａ）参照）。
また、第一押圧部６Ｂは、被挿入部６Ａの外面６ａの四辺のうちの一辺から外方側に向かって二股状に延出して形成されている。 As shown in FIG. 7, the first holding member 6 is made of a metal member and integrally includes an inserted portion 6A and a first pressing portion 6B. The inserted portion 6A is formed in a trapezoidal shape with an outer surface 6a and an inner surface 6b whose diameter increases as it approaches the first flange portion La in a transverse cross-sectional view (a cross-sectional view perpendicular to the joining direction). (See FIG. 7(a), which is a bottom view of FIG. 7(c)).
Further, the first pressing portion 6B is formed so as to extend outward in a forked shape from one of the four sides of the outer surface 6a of the inserted portion 6A.

被挿入部６Ａの内部には、両フランジ部Ｌａ，１Ａの接合方向に沿って、後述する第二挟持部材５の挿入部５Ａを受け入れる筒状内部空間６ｃが形成されている（図７（ａ）のVIIｂ－VIIｂ矢視図である図７（ｂ）参照）。つまり、図９に示すように、補強治具Ｐが両フランジ部Ｌａ，１Ａに装着されるとき、第一フランジ部Ｌａの外周面２ｅよりも径方向外側の位置において、第二挟持部材５に挿入部５Ａが形成され、第一挟持部材６には、接合方向に沿って挿入部５Ａを内部に受け入れる被挿入部６Ａが形成されている。 Inside the inserted portion 6A, a cylindrical internal space 6c is formed along the joining direction of both flange portions La and 1A to receive an insertion portion 5A of the second holding member 5 described later (see FIG. 7(a)). ), which is a VIIb-VIIb arrow view). That is, as shown in FIG. 9, when the reinforcing jig P is attached to both the flange portions La and 1A, the second clamping member 5 is positioned radially outward of the outer peripheral surface 2e of the first flange portion La. An inserting portion 5A is formed, and the first holding member 6 is formed with an inserted portion 6A for receiving the inserting portion 5A therein along the joining direction.

筒状内部空間６ｃは横断面視で台形状に形成され、台形状の挿入部５Ａの外径よりも若干大きく形成されている。このため、図９に示すように、挿入部５Ａの外面５ａと被挿入部６Ａの内面６ｂとの接合方向に垂直な断面形状は、挿入部５Ａを被挿入部６Ａの筒状内部空間６ｃに挿入すると、挿入方向（筒状内部空間６ｃの長手方向）には摺動可能であるが、挿入方向周り（筒状内部空間６ｃの長手方向に沿った軸周り）での相対回転が不能となるように形成されている。 The cylindrical inner space 6c is formed in a trapezoidal cross-sectional view, and is formed slightly larger than the outer diameter of the trapezoidal insertion portion 5A. For this reason, as shown in FIG. 9, the cross-sectional shape perpendicular to the joining direction between the outer surface 5a of the insertion portion 5A and the inner surface 6b of the inserted portion 6A is such that the insertion portion 5A fits into the tubular inner space 6c of the inserted portion 6A. When inserted, it is slidable in the insertion direction (longitudinal direction of the cylindrical internal space 6c), but relative rotation around the insertion direction (around the axis along the longitudinal direction of the cylindrical internal space 6c) becomes impossible. is formed as

また、筒状内部空間６ｃにおいて、第一押圧部６Ｂが形成された側とは反対側が開口形成されている。筒状内部空間６ｃにおける第一押圧部６Ｂが形成された側は、締結ボルト８Ａの雄ネジ部８ａを挿入可能で且つ頭部８ｂを挿通不能な挿通孔６ｄが、被挿入部６Ａの底部を貫通する状態で開口形成されている。なお、締結ボルト８Ａの雄ネジ部８ａが挿通孔６ｄに挿通された状態では、雄ネジ部８ａの外周面と挿通孔６ｄの内周面との間には、所定の隙間が形成される（図２参照）。 Further, in the cylindrical inner space 6c, an opening is formed on the side opposite to the side on which the first pressing portion 6B is formed. On the side of the tubular inner space 6c where the first pressing portion 6B is formed, an insertion hole 6d into which the male threaded portion 8a of the fastening bolt 8A can be inserted and into which the head portion 8b cannot be inserted is formed at the bottom of the inserted portion 6A. An opening is formed in a penetrating state. When the male threaded portion 8a of the fastening bolt 8A is inserted through the insertion hole 6d, a predetermined gap is formed between the outer peripheral surface of the male threaded portion 8a and the inner peripheral surface of the insertion hole 6d ( See Figure 2).

第一押圧部６Ｂは、側面視で腕の長さが同一の二股状に形成され（図７（ａ）参照）、縦断面視で先端側に行くにつれて挿通孔６ｄから遠ざかるテーパー形状に形成されている（図７（ｂ）参照）。また、第一押圧部６Ｂのうち筒状内部空間６ｃの開口側の先端部位が、被挿入部６Ａの外面６ａと垂直な押圧面６ｅとして形成されている。 The first pressing portion 6B is formed in a bifurcated shape having the same arm length when viewed from the side (see FIG. 7(a)), and is formed into a tapered shape in which the distance from the insertion hole 6d increases toward the distal end side when viewed in longitudinal section. (See FIG. 7(b)). Further, the tip portion of the first pressing portion 6B on the opening side of the tubular inner space 6c is formed as a pressing surface 6e perpendicular to the outer surface 6a of the inserted portion 6A.

図３に示すように第一押圧部６Ｂは、第一フランジ部Ｌａの外側面２ｃにおいて、空気弁Ｌの周方向に沿った第二ナット７３の両側の領域を押圧するように構成されている。つまり、第一押圧部６Ｂは、被挿入部６Ａの外面６ａから外側に向かって第二ナット７３の外径より大きな間隔を維持しつつ延出し、第二ナット７３を収容するＵ字状のナット収容部６ｆを形成している。両挟持部材６，５を両フランジ部Ｌａ，１Ａに径外方向から装着すると、このナット収容部６ｆが第二ナット７３に当接しない状態で、第一押圧部６Ｂが第一フランジ部Ｌａの外側面２ｃを押圧することとなる。また、第一押圧部６Ｂの押圧面６ｅは、第一フランジ部Ｌａと第二フランジ部１Ａとの間に介在するシール部材２１よりも径方向外側にある第二連結ボルト７Ｂの近傍を押圧することとなる。よって、シール部材２１のシール機能を高めつつ、第二連結ボルト７Ｂの隙間から漏水することを確実に防止することができる。 As shown in FIG. 3, the first pressing portion 6B is configured to press regions on both sides of the second nut 73 along the circumferential direction of the air valve L on the outer surface 2c of the first flange portion La. . That is, the first pressing portion 6B extends outward from the outer surface 6a of the inserted portion 6A while maintaining a distance larger than the outer diameter of the second nut 73, and is a U-shaped nut that accommodates the second nut 73. A housing portion 6f is formed. When both clamping members 6 and 5 are attached to both flange portions La and 1A from the radially outer direction, the first pressing portion 6B is pressed against the first flange portion La in a state in which the nut accommodating portion 6f does not come into contact with the second nut 73. It presses the outer surface 2c. Further, the pressing surface 6e of the first pressing portion 6B presses the vicinity of the second connecting bolt 7B radially outside the sealing member 21 interposed between the first flange portion La and the second flange portion 1A. It will happen. Therefore, it is possible to reliably prevent water from leaking from the gap of the second connecting bolt 7B while enhancing the sealing function of the sealing member 21 .

第一挟持部材６の被挿入部６Ａは、第一フランジ部Ｌａの外周面２ｅおよび第二フランジ部１Ａの外周面１ｅと対向する内表面（外面６ａ）の周方向に沿った両端部に、径内方向に突出して形成され、両フランジ部Ｌａ，１Ａに当接可能な当接部６ｈを有している（図７（ｃ）参照）。この当接部６ｈは、第一フランジ部Ｌａの外周面２ｅに対応した傾斜面を有している。詳細は後述するが、補強治具Ｐを締結機構８で固定する際、当接部６ｈが両フランジ部Ｌａ，１Ａに当接することで、補強治具Ｐの回転が阻止される。なお、この当接部６ｈは、第一フランジ部Ｌａの外周面２ｅと対向する内表面のうち、補強治具Ｐが回転する方向の一方の端部にのみ設けても良い。また、当接部６ｈは、第一フランジ部Ｌａの外周面２ｅまたは第二フランジ部１Ａのいずれかの外周面２ｅ，１ｅと対向する内表面にのみ設けても良い。さらに、当接部６ｈの形状も、複数の凸部で形成するなどどのような形状であっても良い。 The inserted portion 6A of the first holding member 6 is provided at both ends along the circumferential direction of the inner surface (outer surface 6a) facing the outer peripheral surface 2e of the first flange portion La and the outer peripheral surface 1e of the second flange portion 1A, It has a contact portion 6h that protrudes radially inward and can contact both the flange portions La and 1A (see FIG. 7(c)). The contact portion 6h has an inclined surface corresponding to the outer peripheral surface 2e of the first flange portion La. Although the details will be described later, when the reinforcing jig P is fixed by the fastening mechanism 8, the abutting portion 6h abuts on both the flange portions La and 1A, thereby preventing the reinforcing jig P from rotating. The contact portion 6h may be provided only at one end of the inner surface facing the outer peripheral surface 2e of the first flange portion La in the direction in which the reinforcing jig P rotates. Also, the contact portion 6h may be provided only on the inner surface facing either the outer peripheral surface 2e of the first flange portion La or the outer peripheral surface 2e, 1e of the second flange portion 1A. Furthermore, the shape of the contact portion 6h may be any shape such as a plurality of convex portions.

図８に示すように、第二挟持部材５は、金属部材により構成され、挿入部５Ａと、挿入部５Ａの外面５ａから全周に亘って外方側に延出する鍔状部５Ｂと、鍔状部５Ｂの四辺のうちの一辺からさらに外方側に延出する第二押圧部５Ｃとを一体的に備えている。挿入部５Ａは、横断面視において、外面５ａが第二フランジ部１Ａに近付くほど拡径する台形状を呈し、内面５ｂが円形状の有底角筒状で形成されている（図８（ｃ）の平面視である図８（ａ）参照）。 As shown in FIG. 8, the second holding member 5 is made of a metal member, and includes an insertion portion 5A, a brim portion 5B extending outward from the outer surface 5a of the insertion portion 5A over the entire circumference, A second pressing portion 5C extending further outward from one of the four sides of the brim portion 5B is integrally provided. The insertion portion 5A has a trapezoidal shape in which the outer surface 5a expands in diameter as it approaches the second flange portion 1A in cross-sectional view, and the inner surface 5b is formed in the shape of a circular bottomed rectangular tube (Fig. 8(c)). ) which is a plan view of FIG. 8(a)).

挿入部５Ａの内部には、締結ボルト８Ａの雄ネジ部８ａを挿通可能な円筒状の筒状内部空間５ｃが形成されている。筒状内部空間５ｃの内径は、締結ボルト８Ａの雄ネジ部８ａの外径よりも大径に形成されている。 Inside the insertion portion 5A, a cylindrical inner space 5c is formed through which the male screw portion 8a of the fastening bolt 8A can be inserted. The inner diameter of the tubular inner space 5c is formed to be larger than the outer diameter of the male screw portion 8a of the fastening bolt 8A.

鍔状部５Ｂは、接合方向と垂直な断面視で台形状に形成され、中央部に筒状内部空間５ｃが貫通形成されている（図８（ａ）参照）。 The brim portion 5B is formed in a trapezoidal shape when viewed in a cross section perpendicular to the joining direction, and has a cylindrical inner space 5c penetrating through the central portion (see FIG. 8A).

筒状内部空間５ｃにおいて、鍔状部５Ｂおよび第二押圧部５Ｃが形成された側は開口形成され、鍔状部５Ｂおよび第二押圧部５Ｃが形成された側とは反対側は、締結ボルト８Ａの雄ネジ部８ａが螺合可能な雌ネジ部５ｄが、挿入部５Ａの底部を貫通する状態で開口形成されている（図８（ａ）のVIIIｂ－VIIIｂ矢視図である図８（ｂ）参照）。つまり、雌ネジ部５ｄは、挿入部５Ａにおける筒状内部空間５ｃの内面５ｂにおいて、鍔状部５Ｂおよび第二押圧部５Ｃが形成された側とは反対側の端部に形成されている。 In the cylindrical inner space 5c, the side on which the flange portion 5B and the second pressing portion 5C are formed is an opening, and the side opposite to the side on which the flange portion 5B and the second pressing portion 5C are formed is a fastening bolt. A female threaded portion 5d into which the male threaded portion 8a of 8A can be screwed is formed so as to pass through the bottom portion of the insertion portion 5A (Fig. b) see). That is, the female threaded portion 5d is formed at the end portion of the inner surface 5b of the cylindrical internal space 5c of the insertion portion 5A, opposite to the side on which the brim portion 5B and the second pressing portion 5C are formed.

第二押圧部５Ｃは、側面視で腕の長さが同一の二股状に形成され（図８（ａ）参照）、縦断面視で先端側に行くにつれて雌ネジ部５ｄ側に傾斜するテーパー形状に形成されている（図８（ｂ）参照）。また、第二押圧部５Ｃのうち雌ネジ部５ｄ側の面の先端部位が、挿入部５Ａの外面５ａと垂直な押圧面５ｅとして形成されている。 The second pressing portion 5C is formed in a bifurcated shape having the same arm length when viewed from the side (see FIG. 8A), and has a tapered shape inclining toward the female screw portion 5d as it goes toward the distal end side when viewed in longitudinal section. (see FIG. 8(b)). Further, the distal portion of the surface of the second pressing portion 5C on the side of the female screw portion 5d is formed as a pressing surface 5e perpendicular to the outer surface 5a of the insertion portion 5A.

図４に示すように第二押圧部５Ｃは、第二フランジ部１Ａの外側面１ｃにおいて、補修弁Ｘの周方向に沿った第二連結ボルト７Ｂの頭部７１ａの両側の領域を押圧するように構成されている。また、多角形状に形成された頭部７１ａの対向する両辺に沿って接触する接触面５ｇが設けられている。両挟持部材６，５を両フランジ部Ｌａ，１Ａに挿入して締結機構８で固定する際、当接部６ｈが両フランジ部Ｌａ，１Ａに当接すれば両挟持部材６，５の回転が阻止される。加えて、第二押圧部５Ｃの接触面５ｇを頭部７１ａの両辺に接触させることで、第二連結ボルト７Ｂの締結力が作用して両挟持部材６，５の回転を確実に阻止することができる。なお、本実施形態では、接触面５ｇを頭部７１ａの対向する両辺に沿って接触させているが、少なくとも頭部７１ａの一辺に対向する面が、頭部７１ａの一辺に近接した非接触状態で並行に形成されていれば良い。 As shown in FIG. 4, the second pressing portion 5C presses regions on both sides of the head portion 71a of the second connecting bolt 7B along the circumferential direction of the repair valve X on the outer surface 1c of the second flange portion 1A. is configured to In addition, contact surfaces 5g are provided along opposite sides of the polygonal head 71a. When both holding members 6 and 5 are inserted into both flange portions La and 1A and fixed by the fastening mechanism 8, if the contact portion 6h comes into contact with both flange portions La and 1A, rotation of both holding members 6 and 5 is prevented. be done. In addition, by bringing the contact surface 5g of the second pressing portion 5C into contact with both sides of the head portion 71a, the fastening force of the second connecting bolt 7B acts to reliably prevent the rotation of both clamping members 6 and 5. can be done. In the present embodiment, the contact surface 5g is in contact along both opposing sides of the head 71a. It is sufficient if they are formed in parallel with each other.

また、図４に示すように、第二連結ボルト７Ｂの頭部７１ａと第二フランジ部１Ａの外側面１ｃとの間にワッシャ部材７１ｃが介在しており、第二押圧部５Ｃには、このワッシャ部材７１ｃを収容する収容部５ｈが切欠き形成されている（図８（ｃ）参照）。その結果、第二挟持部材５は、第二フランジ部１Ａに対してワッシャ部材７１ｃに邪魔されることなく挿入され、第二連結ボルト７Ｂの頭部７１ａの対向する両辺が接触面５ｇと接触した状態で、第一押圧部６Ｂが第二フランジ部１Ａの外側面１ｃを押圧することとなる。なお、本実施形態では、第一連結ボルト７Ａの頭部７１ａやナット７２，７３と両フランジ部Ｌａ，１Ａの外側面２ｃ，１ｃとの間にもワッシャ部材７１ｃが介在している。 Further, as shown in FIG. 4, a washer member 71c is interposed between the head portion 71a of the second connecting bolt 7B and the outer surface 1c of the second flange portion 1A. A housing portion 5h for housing the washer member 71c is cut out (see FIG. 8(c)). As a result, the second clamping member 5 was inserted into the second flange portion 1A without being obstructed by the washer member 71c, and both opposite sides of the head portion 71a of the second connecting bolt 7B came into contact with the contact surface 5g. In this state, the first pressing portion 6B presses the outer surface 1c of the second flange portion 1A. In this embodiment, a washer member 71c is also interposed between the head portion 71a of the first connecting bolt 7A, the nuts 72, 73, and the outer side surfaces 2c, 1c of the flange portions La, 1A.

締結機構８は、図９に示すように、被挿入部６Ａの外側から挿通孔６ｄを介して筒状内部空間６ｃ内に挿入される上述の締結ボルト８Ａと、挿入部５Ａの内面５ｂに形成された雌ネジ部５ｄとから構成されている。締結ボルト８Ａは、雄ネジ部８ａと、多角形状（本実施形態では六角形）の頭部８ｂと、を有している。なお、締結ボルト８Ａは、六角ボルトに限定されず、六角穴付きボルト等どのような形態であっても良い。 As shown in FIG. 9, the fastening mechanism 8 is formed on the fastening bolt 8A, which is inserted into the cylindrical internal space 6c from the outside of the inserted portion 6A through the insertion hole 6d, and on the inner surface 5b of the insertion portion 5A. and a female threaded portion 5d. The fastening bolt 8A has a male screw portion 8a and a polygonal (hexagonal in this embodiment) head portion 8b. Note that the fastening bolt 8A is not limited to a hexagon bolt, and may be of any form such as a hexagon socket head bolt.

次に、両フランジ部Ｌａ，１Ａの接合部に、補強治具Ｐを装着する作業工程について説明する。 Next, a working process for attaching the reinforcing jig P to the joint portion between the two flange portions La and 1A will be described.

図９に示すように、まず、両フランジ部Ｌａ，１Ａの接合部にある複数の既設ボルト（不図示）を取外し、第一連結ボルト７Ａや第二連結ボルト７Ｂに交換して仮締めする。次いで、両フランジ部Ｌａ，１Ａの外周面２ｅ，１ｅよりも径方向外側の位置で、第二挟持部材５の挿入部５Ａを、第一挟持部材６の被挿入部６Ａの筒状内部空間６ｃに、接合方向に沿って挿入する。その際、挿入部５Ａの外面５ａと被挿入部６Ａの内面６ｂとが横断面視で相対回転不能な台形状に形成されているので、第二挟持部材５の第二押圧部５Ｃと第一挟持部材６の第一押圧部６Ｂとを同方向に延出させた所望の相対位置関係に位置決めした状態で、容易に挿入することができる。 As shown in FIG. 9, first, a plurality of existing bolts (not shown) at the joints of both flanges La and 1A are removed, replaced with first connecting bolts 7A and second connecting bolts 7B, and temporarily tightened. Next, the insertion portion 5A of the second clamping member 5 is inserted into the tubular inner space 6c of the inserted portion 6A of the first clamping member 6 at a position radially outside the outer peripheral surfaces 2e, 1e of the flange portions La, 1A. , along the joining direction. At this time, since the outer surface 5a of the insertion portion 5A and the inner surface 6b of the inserted portion 6A are formed in a trapezoidal shape that is not relatively rotatable in a cross-sectional view, the second pressing portion 5C of the second holding member 5 and the first pressing portion 5C It can be easily inserted in a state in which the first pressing portion 6B of the holding member 6 extends in the same direction and is positioned in a desired relative positional relationship.

次いで、締結ボルト８Ａを、接合方向における被挿入部６Ａの外側から挿通孔６ｄを介して筒状内部空間６ｃ内に挿入し、仮固定する。これら挿入部５Ａと被挿入部６Ａとの係合および締結ボルト８Ａの仮固定は、第一押圧部６Ｂの押圧面６ｅと第二押圧部５Ｃの押圧面５ｅとの間隔が、第一フランジ部Ｌａの外側面２ｃと第二フランジ部１Ａの外側面１ｃとの間隔よりも若干大きくなる程度に行われる。つまり、接合方向における挿入部５Ａと被挿入部６Ａとの重なり部位の大きさ（挿入距離）、および、押圧面５ｅと押圧面６ｅとの間隔をそれぞれ適宜設定することができる。このため、両フランジ部Ｌａ，１Ａの呼び径や設計圧力に応じて肉厚が変更される場合でも、重なり部位の大きさを調整することで、両挟持部材６，５を両フランジ部Ｌａ，１Ａに良好に締付固定することができる。 Next, the fastening bolt 8A is inserted from the outside of the inserted portion 6A in the joining direction into the tubular inner space 6c through the insertion hole 6d and temporarily fixed. The engagement between the insertion portion 5A and the inserted portion 6A and the provisional fixation of the fastening bolt 8A are achieved when the distance between the pressing surface 6e of the first pressing portion 6B and the pressing surface 5e of the second pressing portion 5C is the first flange portion. This is done so that the distance between the outer surface 2c of La and the outer surface 1c of the second flange portion 1A is slightly larger. In other words, the size (insertion distance) of the overlapping portion between the insertion portion 5A and the inserted portion 6A in the joining direction and the interval between the pressing surfaces 5e and 6e can be appropriately set. Therefore, even if the wall thickness of both flange portions La and 1A is changed according to the nominal diameter and design pressure of both flange portions La and 1A, both clamping members 6 and 5 can be adjusted to both flange portions La and 1A by adjusting the size of the overlapping portion. 1A can be clamped well.

続いて、両挟持部材６，５の押圧部６Ｂ，５Ｃが第二連結ボルト７Ｂの両側に位置するように補強治具Ｐを両フランジ部Ｌａ，１Ａに径外方向から挿入しつつ、被挿入部６Ａの外面６ａを両フランジ部Ｌａ，１Ａの外周面２ｅ，１ｅの少なくとも一方に当接させる。
この状態で、第一押圧部６Ｂの押圧面６ｅを第一フランジ部Ｌａの外側面２ｃに当接させ、且つ、第二押圧部５Ｃの押圧面５ｅを第二フランジ部１Ａの外側面１ｃに当接させるまで、挿入部５Ａおよび被挿入部６Ａを接合方向に引き寄せる。このとき、接触面５ｇが第二連結ボルト７Ｂの頭部７１ａの両辺に接触し、ワッシャ部材７１ｃが収容部５ｈに収容された状態となる。 Subsequently, the reinforcing jig P is inserted into both the flange portions La and 1A from the outer diameter direction so that the pressing portions 6B and 5C of the both holding members 6 and 5 are positioned on both sides of the second connecting bolt 7B. The outer surface 6a of the portion 6A is brought into contact with at least one of the outer peripheral surfaces 2e, 1e of both flange portions La, 1A.
In this state, the pressing surface 6e of the first pressing portion 6B is brought into contact with the outer surface 2c of the first flange portion La, and the pressing surface 5e of the second pressing portion 5C is pressed against the outer surface 1c of the second flange portion 1A. The insertion portion 5A and the inserted portion 6A are pulled in the joining direction until they abut. At this time, the contact surface 5g comes into contact with both sides of the head portion 71a of the second connecting bolt 7B, and the washer member 71c is housed in the housing portion 5h.

次いで、締結ボルト８Ａを締付けて本固定する。このとき、締結ボルト８Ａは、両フランジ部Ｌａ，１Ａより径方向外側の位置にあるため、締付作業が容易である。一方、締結ボルト８Ａの締付作業に伴って、両挟持部材６，５が両フランジ部Ｌａ，１Ａに対して相対回転して、両挟持部材６，５が脱落するおそれがある。 Next, the fastening bolt 8A is tightened for permanent fixation. At this time, since the fastening bolt 8A is located radially outside the flange portions La and 1A, the fastening operation is easy. On the other hand, as the fastening bolt 8A is tightened, the clamping members 6 and 5 may rotate relative to the flange portions La and 1A, causing the clamping members 6 and 5 to fall off.

しかしながら、本実施形態における補強治具Ｐは、両フランジ部Ｌａ，１Ａの外周面２ｅ，１ｅに対向する外面６ａの端部に当接部６ｈを有するので、当接部６ｈが両フランジ部Ｌａ，１Ａに当接して両挟持部材６，５の回転を阻止することができる。しかも、第二押圧部５Ｃの接触面５ｇが頭部７１ａの両辺に接触しているので、第二連結ボルト７Ｂの締結力が作用して両挟持部材６，５の回転を未然に阻止することができる。その結果、締結ボルト８Ａの締付作業がより一層容易なものとなり、両挟持部材６，５の装着姿勢を安定させることができる。なお、上述した締結ボルト８Ａの仮固定を行わずに、本固定のみとしても良い。 However, since the reinforcing jig P in this embodiment has the contact portion 6h at the end portion of the outer surface 6a facing the outer peripheral surfaces 2e, 1e of both the flange portions La, 1A, the contact portion 6h is , 1A to prevent rotation of both clamping members 6 and 5. As shown in FIG. Moreover, since the contact surface 5g of the second pressing portion 5C is in contact with both sides of the head portion 71a, the tightening force of the second connecting bolt 7B acts to prevent both holding members 6 and 5 from rotating. can be done. As a result, the tightening operation of the fastening bolt 8A becomes much easier, and the mounting attitude of both the clamping members 6 and 5 can be stabilized. It should be noted that only permanent fixing may be performed without temporarily fixing the fastening bolt 8A described above.

一つの補強治具Ｐが両フランジ部Ｌａ，１Ａに本固定されると、他の補強治具Ｐも同様の作業を繰り返して本固定する。そして、両フランジ部Ｌａ，１Ａの外側面２ｃ，１ｃに対向して配置される第二連結ボルト７Ｂの２箇所に補強治具Ｐを本固定した後、全ての第一連結ボルト７Ａおよび第二連結ボルト７Ｂを本固定して、補強治具Ｐの装着が完了する。このとき、第二連結ボルト７Ｂを高ナット式で構成しているので、締付作業が容易である。また、第二押圧部５Ｃの接触面５ｇが第二連結ボルト７Ｂの頭部７１ａに当接するので、第二ナット７３のみを締め付ければボルト部７１の共回りが防止され、締付作業が効率的である。なお、補強治具Ｐの本固定や第一連結ボルト７Ａおよび第二連結ボルト７Ｂの本固定は、適宜順番を入れ替えても良いし、繰り返し実施しても良い。また、本実施形態では、４箇所の連結ボルト７のうちの２箇所に補強治具Ｐを装着する例を示したが、接合部の必要強度に応じて１箇所や３箇所以上の連結ボルト７に補強治具Ｐを装着しても良い。 When one reinforcing jig P is permanently fixed to both flange portions La and 1A, the other reinforcing jigs P are also permanently fixed by repeating the same operation. Then, after the reinforcing jigs P are permanently fixed to the two positions of the second connecting bolts 7B arranged facing the outer side surfaces 2c, 1c of both the flange portions La, 1A, all the first connecting bolts 7A and the second connecting bolts After the connection bolt 7B is fully fixed, the mounting of the reinforcing jig P is completed. At this time, since the second connecting bolt 7B is configured with a high nut type, the tightening work is easy. In addition, since the contact surface 5g of the second pressing portion 5C contacts the head portion 71a of the second connecting bolt 7B, if only the second nut 73 is tightened, the bolt portion 71 is prevented from rotating together, and the tightening work is efficient. target. Note that the permanent fixing of the reinforcing jig P and the permanent fixing of the first connecting bolt 7A and the second connecting bolt 7B may be appropriately changed in order or may be repeated. Further, in the present embodiment, an example is shown in which the reinforcing jigs P are attached to two of the four connecting bolts 7, but one or three or more connecting bolts 7 may be attached depending on the required strength of the joint. A reinforcing jig P may be attached to the .

このように、両挟持部材６，５の押圧部６Ｂ，５Ｃを両フランジ部Ｌａ，１Ａの外側面２ｃ，１ｃに当接させた状態で、挿入部５Ａが被挿入部６Ａの内部に固定され、挿入部５Ａと被挿入部６Ａとが接合方向で重なった状態となる。このため、両フランジ部Ｌａ，１Ａを径方向に位置ズレさせる剪断力が作用した場合や、両フランジ部Ｌａ，１Ａを軸方向に引き離す引張力が作用して押圧部６Ｂ，５Ｃが開き方向の力を受けた場合でも、締結機構８の締結部位に加えて、挿入部５Ａと被挿入部６Ａとの重なり部位でもこれらの力を受け止めるので、締結機構８の締結部位に掛かる締結力が低下するのを防止することができる。 In this manner, the insertion portion 5A is fixed inside the inserted portion 6A while the pressing portions 6B and 5C of the holding members 6 and 5 are in contact with the outer side surfaces 2c and 1c of the flange portions La and 1A. , the insertion portion 5A and the inserted portion 6A overlap in the joining direction. For this reason, when a shearing force acts to displace both flanges La and 1A in the radial direction, or a tensile force acts to separate both flanges La and 1A in the axial direction, the pressing portions 6B and 5C move in the opening direction. Even if a force is applied, not only the fastening portion of the fastening mechanism 8 but also the overlapping portion of the insertion portion 5A and the inserted portion 6A receive the force, so the fastening force applied to the fastening portion of the fastening mechanism 8 is reduced. can be prevented.

また、挿入部５Ａの雌ネジ部５ｄが、締結ボルト８Ａの頭部８ｂに近接した位置に位置することから、雌ネジ部５ｄと締結ボルト８Ａの雄ネジ部８ａとの螺合箇所が、締結ボルト８Ａの頭部８ｂが被挿入部６Ａの上面６ｇと当接する位置に近接する。つまり、接合方向における締結ボルト８Ａの頭部８ｂと当該螺合箇所との距離が比較的小さい。これにより、両フランジ部Ｌａ，１Ａに剪断力や引張力が作用した場合でも、締結ボルト８Ａの伸びや破壊を良好に防止することができる。 In addition, since the female threaded portion 5d of the insertion portion 5A is positioned close to the head portion 8b of the fastening bolt 8A, the threaded portion between the female threaded portion 5d and the male threaded portion 8a of the fastening bolt 8A is fastened. The head 8b of the bolt 8A comes close to the position where it abuts on the upper surface 6g of the inserted portion 6A. That is, the distance between the head portion 8b of the fastening bolt 8A and the threaded portion in the joining direction is relatively small. As a result, even when a shearing force or a tensile force acts on both flange portions La, 1A, elongation or breakage of the fastening bolt 8A can be satisfactorily prevented.

また、雌ネジ部５ｄを、筒状内部空間６ｃ内における挿入部５Ａと被挿入部６Ａとの重なり部位に位置させているので、締結ボルト８Ａの長さを比較的短くすることが可能となる。しかも、本実施形態では、両フランジ部Ｌａ，１Ａの外周面２ｅ，１ｅの径方向外側位置において、挿入部５Ａおよび被挿入部６Ａの配設箇所と、締結ボルト８Ａの配設箇所とが同じになる。これにより、両フランジ部Ｌａ，１Ａに装着された補強治具Ｐおよび締結ボルト８Ａの接合方向での寸法や径方向での寸法の何れをも小さくすることができ、省スペース化を図ることができる。 In addition, since the female threaded portion 5d is located in the overlapping portion of the insertion portion 5A and the inserted portion 6A in the tubular inner space 6c, the length of the fastening bolt 8A can be relatively shortened. . Moreover, in this embodiment, the insertion portion 5A and the inserted portion 6A and the fastening bolt 8A are arranged at the same radial outer positions of the outer peripheral surfaces 2e, 1e of the flange portions La, 1A. become. As a result, both the dimension in the joining direction and the dimension in the radial direction of the reinforcing jig P and the fastening bolt 8A mounted on both the flange portions La and 1A can be reduced, thereby saving space. can.

このように、補強治具Ｐを装着することで、両フランジ部Ｌａ，１Ａの接合部を確実に補強することができる。このとき、第一挟持部材６や第二挟持部材５に二股状の第一押圧部６Ｂや第二押圧部５Ｃを設けることで、両フランジ部Ｌａ，１Ａの外側面２ｃ，１ｃのうち連結ボルト７より径内側部位の空間が狭隘な場合でも、補強治具Ｐを径外方向から容易に装着することができる。しかも、被挿入部６Ａの内面６ｂおよび挿入部５Ａの外面５ａが、第二フランジ部１Ａに近付くほど拡径する台形状に形成されているので、押圧部６Ｂ，５Ｃの押圧面積を広く確保することができる。その結果、補修弁Ｘのフランジ接合部の補強強度が、効果的に高められる。 By mounting the reinforcing jig P in this manner, the joint portion between both the flange portions La and 1A can be reliably reinforced. At this time, by providing the bifurcated first pressing portion 6B and the second pressing portion 5C in the first holding member 6 and the second holding member 5, the connecting bolt can Even if the space in the radially inner side of 7 is narrow, the reinforcing jig P can be easily mounted from the radially outer direction. Moreover, since the inner surface 6b of the inserted portion 6A and the outer surface 5a of the inserted portion 5A are formed in a trapezoidal shape that increases in diameter as it approaches the second flange portion 1A, a wide pressing area is secured for the pressing portions 6B and 5C. be able to. As a result, the reinforcement strength of the flange joint portion of the repair valve X is effectively increased.

[補修弁Ｘと分岐管Ｍとの接合部]
図５～図６および図１０には、補修弁Ｘと分岐管Ｍとの接合部に、補強治具Ｐを装着する実施形態が示される。なお、上述した空気弁Ｌと補修弁Ｘとの接合部に補強治具Ｐを装着する実施形態とは異なる構成のみ説明する。ここで、補修弁Ｘと分岐管Ｍとの関係では、補修弁Ｘを第一筒状部材、分岐管Ｍを第二筒状部材として説明する。 [Junction between repair valve X and branch pipe M]
5 to 6 and 10 show an embodiment in which a reinforcing jig P is attached to the junction between the repair valve X and the branch pipe M. As shown in FIG. Only the configuration different from the above-described embodiment in which the reinforcing jig P is attached to the joint portion between the air valve L and the repair valve X will be described. Here, regarding the relationship between the repair valve X and the branch pipe M, the repair valve X will be described as the first tubular member, and the branch pipe M as the second tubular member.

上述した空気弁Ｌと補修弁Ｘとの接合部に、所定の間隔（例えば接合面間隔が１００ｍｍ～４００ｍｍ）空けて、補修弁Ｘと分岐管Ｍとの接合部が形成されている。図３，図５に示すように、この接合部に装着される補強治具Ｐは、空気弁Ｌと補修弁Ｘとの接合部に装着される補強治具Ｐに対して周方向の位置を約４５度ずらして配置している。つまり、補修弁Ｘで規定される接合面間隔が小さい場合でも、上下に配置される補強治具Ｐが互いに干渉しないので、あらゆる接合面間隔を有するフランジ接合部を補強することが可能となる。なお、上下方向の各補強治具Ｐの周方向の位置を約４５度ずらして配置することに限定されず、例えば３０度ずらして配置しても良く、どのような角度であっても良いし、上下方向の各補強治具Ｐの周方向の位置をずらさなくても良い。 A joint portion between the repair valve X and the branch pipe M is formed at the joint portion between the air valve L and the repair valve X described above with a predetermined gap (for example, a joint surface interval of 100 mm to 400 mm). As shown in FIGS. 3 and 5, the reinforcing jig P attached to this joint portion is positioned circumferentially with respect to the reinforcing jig P attached to the joint portion between the air valve L and the repair valve X. They are arranged at an angle of about 45 degrees. In other words, even if the gap between joint surfaces defined by the repair valve X is small, the reinforcement jigs P arranged above and below do not interfere with each other, so it is possible to reinforce flange joints having any gap between joint surfaces. It should be noted that the position of each reinforcing jig P in the vertical direction is not limited to being shifted by about 45 degrees in the circumferential direction. , the position of each reinforcing jig P in the vertical direction may not be shifted in the circumferential direction.

ところで、近年の浅埋設用の補修弁Ｘは、特に接合面間隔が狭い。この場合、補修弁Ｘと分岐管Ｍとの接合部に固定される補強治具Ｐの締結ボルト８Ａの頭部８ｂを、第二フランジ部Ｍａの外側面２ｄ側に配置するのが好ましい。つまり、図２に示す補修弁Ｘと分岐管Ｍとの接合部に固定される補強治具Ｐを上下逆向きに設置することで、締結機構８の頭部８ｂが接合面間隔の空間を占有しないので、補強治具Ｐどうしの干渉を防止することができる。その結果、上下方向の各補強治具Ｐの周方向の位置をずらす必要がなくなると共に、締結機構８の本固定や、連結ボルト７の本固定を、第二フランジ部Ｍａの外側面２ｄ側から作業できるので、効率的である。 By the way, recent repair valves X for shallow burial have particularly narrow joint surface intervals. In this case, it is preferable that the head portion 8b of the fastening bolt 8A of the reinforcing jig P fixed to the joint portion between the repair valve X and the branch pipe M is arranged on the side of the outer surface 2d of the second flange portion Ma. That is, by installing the reinforcing jig P fixed to the joint between the repair valve X and the branch pipe M shown in FIG. Therefore, it is possible to prevent the reinforcing jigs P from interfering with each other. As a result, it is not necessary to shift the position of each reinforcing jig P in the circumferential direction in the vertical direction. It works, so it's efficient.

図５に示すような接合方向視において、補修弁Ｘと分岐管Ｍとの接合部には、補修弁Ｘの筒本体から径外方向に膨出する複数の膨出部１ｂが周方向に配置されている。また、各膨出部１ｂの間には、複数の第一連結ボルト７Ａが配置されている。このため、第一連結ボルト７Ａと膨出部１ｂとの周方向の間隔が狭く、該間隔に補強治具Ｐを挿入することが困難である。そこで、本実施形態では、第一挟持部材６の第一押圧部６Ｂが、膨出部１ｂの周方向に沿った両側の領域を押圧する構成としている。その結果、補強治具Ｐを両フランジ部１Ｂ，Ｍａの径外方向から挿入した際、第一押圧部６Ｂを十分に挿入することができる。 As seen in the joining direction as shown in FIG. 5, at the joint between the repair valve X and the branch pipe M, a plurality of bulging portions 1b that bulge radially outward from the main body of the repair valve X are arranged in the circumferential direction. It is Moreover, a plurality of first connection bolts 7A are arranged between the respective bulging portions 1b. Therefore, the space between the first connecting bolt 7A and the bulging portion 1b in the circumferential direction is narrow, and it is difficult to insert the reinforcing jig P into the space. Therefore, in the present embodiment, the first pressing portion 6B of the first holding member 6 is configured to press the regions on both sides of the bulging portion 1b along the circumferential direction. As a result, the first pressing portion 6B can be sufficiently inserted when the reinforcing jig P is inserted from the radially outer direction of both the flange portions 1B and Ma.

また、本実施形態では、図６に示すように、連結ボルト７の配置されない部位に第二挟持部材５の第二押圧部５Ｃが配置されている。つまり、補修弁Ｘと分岐管Ｍとの接合部に用いられる補強治具Ｐと同様の補強治具Ｐを使用することで、量産化を図って製造コストを節約している。なお、本実施形態では、補強治具Ｐを連結ボルト７の存在しない部位に装着するので、第二挟持部材５に二股状の第二押圧部５Ｃを形成せずに、単一の第二押圧部５Ｃで構成しても良い。 In addition, in this embodiment, as shown in FIG. 6, the second pressing portion 5C of the second holding member 5 is arranged at a portion where the connecting bolt 7 is not arranged. In other words, by using a reinforcing jig P similar to the reinforcing jig P used for the junction between the repair valve X and the branch pipe M, mass production is achieved and the manufacturing cost is saved. In this embodiment, since the reinforcing jig P is attached to a portion where the connecting bolt 7 does not exist, the second holding member 5 is not formed with the bifurcated second pressing portion 5C. It may be configured by the part 5C.

次に、補強治具Ｐを装着する作業工程について、図１０を用いて簡単に説明する。まず、両フランジ部１Ｂ，Ｍａの接合部にある複数の既設ボルト（不図示）を取外し、第一連結ボルト７Ａに交換して仮締めする。次いで、両フランジ部１Ｂ，Ｍａの外周面１ｆ，２ｆよりも径方向外側の位置で、挿入部５Ａを、被挿入部６Ａの筒状内部空間６ｃに接合方向に沿って挿入する。次いで、締結ボルト８Ａを、接合方向における被挿入部６Ａの外側から挿通孔６ｄを介して筒状内部空間６ｃ内に挿入し、仮固定する。 Next, a working process for mounting the reinforcing jig P will be briefly described with reference to FIG. 10 . First, a plurality of existing bolts (not shown) at the joints of both flanges 1B and Ma are removed, replaced with first connecting bolts 7A, and temporarily tightened. Next, the inserting portion 5A is inserted along the joining direction into the cylindrical inner space 6c of the inserted portion 6A at a position radially outside the outer peripheral surfaces 1f, 2f of the flange portions 1B, Ma. Next, the fastening bolt 8A is inserted from the outside of the inserted portion 6A in the joining direction into the tubular inner space 6c through the insertion hole 6d and temporarily fixed.

続いて、膨出部１ｂの両側に第一押圧部６Ｂが位置するように補強治具Ｐを両フランジ部１Ｂ，Ｍａに径外方向から挿入しつつ、被挿入部６Ａの外面６ａを両フランジ部１Ｂ，Ｍａの外周面１ｆ，２ｆの少なくとも一方に当接させる。次いで、締結ボルト８Ａの雄ネジ部８ａを、筒状内部空間６ｃに挿入されている挿入部５Ａの雌ネジ部５ｄに螺合させて、締結ボルト８Ａの頭部８ｂが被挿入部６Ａの上面６ｇに当接するまで、本固定する。このとき、本実施形態においても、第一挟持部材６のうち、両フランジ部１Ｂ，Ｍａの外周面１ｆ，２ｆに対向する外面６ａの端部に当接部６ｈを設けることで、両挟持部材６，５の回転を阻止することができる。なお、二つの第一押圧部６Ｂに挟まれるＵ字状の内周面（ナット収容部６ｆ）を膨出部１ｂの外周形状に沿う形状に構成して、第一押圧部６Ｂの内周面を膨出部１ｂに当接する当接部６ｈとしても良い。この場合、第一挟持部材６の端部に設ける当接部６ｈを省略しても良く、両挟持部材６，５の回転を阻止することが可能である。 Subsequently, while inserting the reinforcing jig P into both the flange portions 1B and Ma from the radially outward direction so that the first pressing portions 6B are located on both sides of the bulging portion 1b, the outer surface 6a of the inserted portion 6A is pressed against both flanges. At least one of the outer peripheral surfaces 1f and 2f of the portions 1B and Ma is brought into contact. Next, the male threaded portion 8a of the fastening bolt 8A is screwed into the female threaded portion 5d of the insertion portion 5A inserted into the tubular inner space 6c, so that the head portion 8b of the fastening bolt 8A is attached to the upper surface of the inserted portion 6A. It is permanently fixed until it abuts against 6g. At this time, also in the present embodiment, by providing the contact portion 6h at the end portion of the outer surface 6a of the first holding member 6 that faces the outer peripheral surfaces 1f and 2f of the flange portions 1B and Ma, both holding members Rotation of 6 and 5 can be prevented. In addition, the U-shaped inner peripheral surface (nut accommodating portion 6f) sandwiched between the two first pressing portions 6B is configured in a shape along the outer peripheral shape of the bulging portion 1b, and the inner peripheral surface of the first pressing portion 6B may be a contact portion 6h that contacts the bulging portion 1b. In this case, the abutting portion 6h provided at the end of the first holding member 6 may be omitted, and the rotation of both holding members 6 and 5 can be prevented.

一つの補強治具Ｐが両フランジ部１Ｂ，Ｍａに本固定されると、他の補強治具Ｐも同様の作業を繰り返して本固定する。そして、両フランジ部１Ｂ，Ｍａの外側面１ｄ，２ｄの周方向に対向して配置される膨出部１ｂの２箇所に補強治具Ｐを本固定した後、全ての第一連結ボルト７Ａを本固定して、補強治具Ｐの装着が完了する。なお、本実施形態における作用効果は、上述した実施形態と同様であるので詳細な説明は省略する。 When one reinforcing jig P is permanently fixed to both flange portions 1B and Ma, the other reinforcing jigs P are also permanently fixed by repeating the same operation. Then, after the reinforcing jigs P are permanently fixed to two locations of the bulging portions 1b arranged facing each other in the circumferential direction of the outer side surfaces 1d and 2d of the flange portions 1B and Ma, all the first connecting bolts 7A are tightened. After final fixing, the mounting of the reinforcing jig P is completed. Note that the effects of this embodiment are the same as those of the above-described embodiment, so detailed description thereof will be omitted.

以下、本発明に係る別実施形態について、上述した実施形態と異なる構成のみ、図１１～図１２を用いて説明する。なお、図面の理解を容易にするため、同じ部材には同じ名称および符号を用いて説明する。 Another embodiment according to the present invention will be described below with reference to FIGS. 11 and 12 only for configurations different from the above-described embodiment. In addition, in order to facilitate understanding of the drawings, the same members are described using the same names and symbols.

［別実施形態１］
図１１に示すように、本実施形態では、第一挟持部材６のフランジ接合部とは反対側の外表面（外面６ａ）に多角形状の突起６１を設けている。両挟持部材６，５をフランジ接合部に挿入して締結機構８で本固定する際、例えばレンチ（不図示）で突起６１を挟持しつつ締結機構８の締結ボルト８Ａを締付ければ、補強治具Ｐの回転を阻止することができる。なお、この突起６１は、締結ボルト８Ａの締付回転方向に対して奥側に位置する側面に設けても良く、レンチ等で挟持できる位置であれば特に限定されない。また、突起６１は多角形状に限定されず、円形状などどのような形状であっても良い。 [Another embodiment 1]
As shown in FIG. 11, in this embodiment, a polygonal projection 61 is provided on the outer surface (outer surface 6a) of the first holding member 6 opposite to the flange joint portion. When both clamping members 6 and 5 are inserted into the flange joint portion and fully fixed by the fastening mechanism 8, for example, if the projection 61 is gripped with a wrench (not shown) and the fastening bolt 8A of the fastening mechanism 8 is tightened, the reinforcing jig is performed. Rotation of the tool P can be prevented. Note that the projection 61 may be provided on the side surface located on the back side with respect to the tightening rotation direction of the fastening bolt 8A, and is not particularly limited as long as it can be held by a wrench or the like. Moreover, the protrusion 61 is not limited to a polygonal shape, and may be of any shape such as a circular shape.

［別実施形態２］
図１２に示すように、本実施形態では、第一挟持部材６のフランジ接合部とは反対側の外表面に、中央に溝部６２ａを形成した多角形状の突起６２を設けている。フランジ接合部に挿入された複数の補強治具Ｐを締結機構８で仮固定した後、夫々の補強治具Ｐに亘ってチェーンなどで構成される保持部材６３を溝部６２ａに係入し、操作具６４で保持部材６３を手繰り寄せることで補強治具Ｐを径内方向に押圧する。次いで、両挟持部材６，５を締結機構８で本固定すれば、補強治具Ｐの回転を阻止することができる。次いで、保持部材６３を取外せば、複数の補強治具Ｐは、フランジ接合部に対して所望の姿勢で配置される。なお、この保持部材６３を取外さずに設置した状態としても良い。この場合、補強治具Ｐの固定姿勢を長期に亘って維持することができる。 [Another embodiment 2]
As shown in FIG. 12, in this embodiment, a polygonal protrusion 62 having a groove 62a formed in the center is provided on the outer surface of the first holding member 6 opposite to the flange joint portion. After the plurality of reinforcing jigs P inserted into the flange joint are temporarily fixed by the fastening mechanism 8, a holding member 63 composed of a chain or the like is engaged in the groove portion 62a over the respective reinforcing jigs P and operated. By pulling the holding member 63 with the tool 64, the reinforcing jig P is pressed radially inward. Next, when both clamping members 6 and 5 are permanently fixed by the fastening mechanism 8, the rotation of the reinforcing jig P can be prevented. Next, when the holding member 63 is removed, the plurality of reinforcing jigs P are arranged in a desired posture with respect to the flange joint. Note that the holding member 63 may be installed without being removed. In this case, the fixed attitude of the reinforcing jig P can be maintained for a long period of time.

［その他の実施形態］
（１）上述した実施形態では、第一挟持部材６は、被挿入部６Ａと第一押圧部６Ｂとを一体的に構成したが、被挿入部６Ａと第一押圧部６Ｂとを別部材で構成しても良い。この場合、第一押圧部６Ｂを雌ねじ部を有する可動部材で構成し、例えばボルトを螺合することで第一押圧部６Ｂを直動させて、フランジ接合部に両挟持部材６，５を近接させて固定する形態などが想定される。また、第一押圧部６Ｂをくさび部材などで移動させても良く、フランジ接合部に両挟持部材６，５を近接させて固定する方法はどのような形態であっても良い。また、第二挟持部材５の第二押圧部５Ｃを可動部材で構成しても良い。 [Other embodiments]
(1) In the above-described embodiment, the first clamping member 6 integrally includes the inserted portion 6A and the first pressing portion 6B. may be configured. In this case, the first pressing portion 6B is composed of a movable member having a female screw portion, and for example, by screwing a bolt, the first pressing portion 6B is linearly moved, and both clamping members 6 and 5 are brought closer to the flange joint portion. A form in which the device is fixed by allowing the device to move is assumed. Further, the first pressing portion 6B may be moved by a wedge member or the like, and the method of bringing both holding members 6 and 5 close to the flange joint portion and fixing them may take any form. Moreover, you may comprise the 2nd press part 5C of the 2nd clamping member 5 with a movable member.

（２）両挟持部材６，５を締結機構８で本固定する際、補強治具Ｐの回転を阻止する形態として、押圧面６ｅ，５ｅの表面にゴム部材を張り付けて、所望の摩擦抵抗を生じさせる構成としても良い。この場合、補強治具Ｐの回転を阻止しつつ、ゴム部材が押し潰されて両挟持部材６，５のフランジ接合部に対する密着性を高めることができる。 (2) When the clamping members 6 and 5 are permanently fixed by the fastening mechanism 8, a rubber member is attached to the surfaces of the pressing surfaces 6e and 5e to prevent the rotation of the reinforcing jig P so as to provide a desired frictional resistance. It is good also as a structure which makes it generate. In this case, while preventing the rotation of the reinforcing jig P, the rubber member is crushed, so that the adhesion between the clamping members 6 and 5 to the flange joint portion can be enhanced.

（３）フランジ接合部に装着された複数の両挟持部材６，５の径外方向への移動を規制するバンド部材を、複数の補強治具Ｐに亘って設けても良い。このバンド部材は、第一挟持部材６の上面６ｇに締結ボルト８Ａを収容する貫通孔を形成した平板円環状に構成しても良いし、第一挟持部材６の上面６ｇとフランジ接合部とは反対側の外表面とに亘って断面視Ｌ字状の半環状部材をボルトで結合する構成としても良く、種々の形態が想定される。 (3) A band member may be provided over a plurality of reinforcing jigs P for restricting radially outward movement of the plurality of holding members 6 and 5 attached to the flange joints. This band member may be configured in a flat annular shape with through holes formed in the upper surface 6g of the first holding member 6 for accommodating the fastening bolts 8A. A configuration in which an L-shaped semi-annular member in a cross-sectional view is connected to the outer surface on the opposite side by bolts may be employed, and various configurations are conceivable.

（４）上述した実施形態における第一挟持部材６、第二挟持部材５、および締結機構８の構成は、適宜変更することができる。例えば、第二挟持部材５に挿入部５Ａを設け、第一挟持部材６に被挿入部６Ａを設けるように構成したが、第二挟持部材５に被挿入部を設け、第一挟持部材６に挿入部を設ける構成としても良い。この場合、第二挟持部材５は、フランジ接合部の外周面と対向する内表面の周方向に沿った端部に、径内方向に突出して形成される当接部６ｈが形成される。また、第二挟持部材５の挿入部５Ａと第一挟持部材６の被挿入部６Ａとの形状を横断面視において台形状としたが、横断面視で楕円形状や矩形状など、挿入部５Ａと被挿入部６Ａとが挿入された状態で接合方向周りでの相対回転が不能に構成されていればどのような形状であっても良い。また、第一押圧部６Ｂの形状と第二押圧部５Ｃの形状とを同一形状にしても良い。また、締結機構８をボルト・ナット構造にしても良く、特に限定されない。 (4) The configurations of the first clamping member 6, the second clamping member 5, and the fastening mechanism 8 in the above-described embodiment can be changed as appropriate. For example, the second holding member 5 is provided with the insertion portion 5A and the first holding member 6 is provided with the inserted portion 6A. A configuration in which an insertion portion is provided may be employed. In this case, the second holding member 5 is formed with a contact portion 6h that protrudes radially inward from the end along the circumferential direction of the inner surface facing the outer peripheral surface of the flange joint portion. In addition, although the shape of the insertion portion 5A of the second holding member 5 and the inserted portion 6A of the first holding member 6 is trapezoidal when viewed in cross section, the shape of the insertion portion 5A may be elliptical or rectangular when viewed in cross section. Any shape may be used as long as it is configured such that relative rotation around the joining direction is disabled in a state in which the and inserted portion 6A are inserted. Also, the shape of the first pressing portion 6B and the shape of the second pressing portion 5C may be the same shape. Further, the fastening mechanism 8 may have a bolt-nut structure, and is not particularly limited.

（５）上述した実施形態におけるフランジ接合部を連結する連結ボルト７は、六角ボルトに限定されず、両ネジボルトや六角穴付きボルト等どのような形態であっても良い。 (5) The connecting bolts 7 that connect the flange joints in the above-described embodiment are not limited to hexagonal bolts, and may be of any form such as double-headed bolts or hexagonal socket head bolts.

（６）上述した実施形態では、補修弁Ｘと空気弁Ｌや分岐管Ｍとのフランジ接合部に補強治具Ｐを固定する例を示したが、流体機器どうしや配管どうしのフランジ接合部などに補強治具Ｐを用いることができることは勿論である。また、上述した補修弁Ｘは一例にすぎず、上述した実施形態における補強治具Ｐは様々な補修弁Ｘに対応することができる。 (6) In the above-described embodiment, an example of fixing the reinforcing jig P to the flange joints between the repair valve X, the air valve L, and the branch pipe M was shown. Needless to say, the reinforcing jig P can be used for . Moreover, the above-described repair valve X is merely an example, and the reinforcing jig P in the above-described embodiment can correspond to various repair valves X.

本発明に係る接合部の補強治具は、流体機器内、流体機器と配管、流体機器どうし又は配管どうしの接合部を補強するための治具として利用可能である。 INDUSTRIAL APPLICABILITY The joint reinforcement jig according to the present invention can be used as a jig for reinforcing joints within a fluid device, between a fluid device and a pipe, between fluid devices, or between pipes.

１Ａ 第二フランジ部
１Ｂ 第一フランジ部
１ｂ 膨出部
１ｃ，１ｄ，２ｃ，２ｄ 外側面
１ｅ，１ｆ，２ｅ，２ｆ 外周面
５ 第二挟持部材
５Ａ 挿入部
５Ｃ 第二押圧部
５ｈ 収容部
６ 第一挟持部材
６Ａ 被挿入部
６Ｂ 第一押圧部
６ｈ 当接部
７ 連結ボルト
７１ａ 頭部
７１ｃ ワッシャ部材
７３ ナット
８ 締結機構
Ｌ 空気弁（第一筒状部材）
Ｌａ 第一フランジ部
Ｍ 分岐管（第二筒状部材）
Ｍａ 第二フランジ部
Ｐ 補強治具
Ｘ 補修弁（第一筒状部材または第二筒状部材） 1A second flange portion 1B first flange portion 1b bulging portions 1c, 1d, 2c, 2d outer side surfaces 1e, 1f, 2e, 2f outer peripheral surface 5 second holding member 5A insertion portion 5C second pressing portion 5h accommodating portion 6 1 Clamping member 6A Inserted portion 6B First pressing portion 6h Contact portion 7 Connecting bolt 71a Head 71c Washer member 73 Nut 8 Fastening mechanism L Air valve (first cylindrical member)
La first flange portion M branch pipe (second tubular member)
Ma second flange portion P reinforcing jig X repair valve (first tubular member or second tubular member)

Claims (4)

第一筒状部材の端部から径外方向に突出した第一フランジ部と第二筒状部材の端部から径外方向に突出した第二フランジ部とを連結ボルトで接合した接合部を補強する接合部補強構造において、
前記第一フランジ部の外側面を押圧する第一押圧部と、前記第二フランジ部の外側面を押圧する第二押圧部と、を含む補強治具と、
複数の前記補強治具を前記第一フランジ部及び前記第二フランジ部に向かって径方向内側に押圧する環状の保持部材と、を備え、
前記第一筒状部材には、複数の前記連結ボルトの中心を前記第一筒状部材の周方向に結んだセンターラインよりも径外方向に突出するように複数の前記連結ボルトの間の位置で筒本体から膨出した膨出部が形成されており、
少なくとも１つの前記補強治具は、前記第一フランジ部および前記第二フランジ部の接合方向視において前記第一押圧部が前記膨出部における前記周方向に沿った側方領域を押圧するように前記接合部に装着されている接合部補強構造。 Reinforcing the joint where the first flange protruding radially outward from the end of the first tubular member and the second flange protruding radially outward from the end of the second tubular member are joined by connecting bolts In the joint reinforcement structure to
a reinforcing jig including a first pressing portion that presses the outer surface of the first flange portion and a second pressing portion that presses the outer surface of the second flange portion;
an annular holding member that presses the plurality of reinforcing jigs radially inward toward the first flange portion and the second flange portion;
Positions between the plurality of connecting bolts are provided on the first cylindrical member so as to protrude radially outward from a center line connecting the centers of the plurality of connecting bolts in the circumferential direction of the first cylindrical member. A bulging portion that bulges from the cylinder body is formed at
The at least one reinforcing jig is configured such that the first pressing portion presses a side region of the bulging portion along the circumferential direction when viewed in the joining direction of the first flange portion and the second flange portion. A joint reinforcement structure attached to the joint. 前記補強治具において、前記第一筒状部材および前記第二筒状部材の少なくとも一方と当接可能な当接部が形成されており、
前記当接部は、前記補強治具のうち、前記第一フランジ部および前記第二フランジ部の少なくとも一方の外周面と対向する内表面の前記周方向に沿った少なくとも一方の端部に、径内方向に突出して形成され、前記第一フランジ部および前記第二フランジ部の少なくとも一方と当接する請求項１に記載の接合部補強構造。 In the reinforcing jig, a contact portion capable of coming into contact with at least one of the first tubular member and the second tubular member is formed,
The abutting portion is provided on at least one end along the circumferential direction of the inner surface facing the outer peripheral surface of at least one of the first flange portion and the second flange portion of the reinforcing jig. 2. The joint reinforcement structure according to claim 1, which is formed to protrude inward and abut on at least one of the first flange portion and the second flange portion. 前記補強治具は、前記第一押圧部を含む第一挟持部材と、前記第二押圧部を含む第二挟持部材と、前記第一挟持部材と前記第二挟持部材とを、前記第一フランジ部および前記第二フランジ部の接合方向に近接させて固定する締結機構と、を有している請求項１又は２に記載の接合部補強構造。 The reinforcing jig includes a first clamping member including the first pressing portion, a second clamping member including the second pressing portion, the first clamping member and the second clamping member, and the first clamping member. 3 . The joint reinforcement structure according to claim 1 , further comprising a fastening mechanism for fixing the second flange portion and the second flange portion close to each other in the joining direction. 前記第一挟持部材は、前記膨出部の前記周方向に沿った両側の領域を押圧する二つの前記第一押圧部を有している請求項３に記載の接合部補強構造。 4. The joining portion reinforcing structure according to claim 3, wherein the first holding member has two of the first pressing portions that press regions on both sides of the bulging portion along the circumferential direction.
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