JP2020180705A - Joint portion reinforcing structure - Google Patents

Joint portion reinforcing structure Download PDF

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JP2020180705A
JP2020180705A JP2020127572A JP2020127572A JP2020180705A JP 2020180705 A JP2020180705 A JP 2020180705A JP 2020127572 A JP2020127572 A JP 2020127572A JP 2020127572 A JP2020127572 A JP 2020127572A JP 2020180705 A JP2020180705 A JP 2020180705A
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Prior art keywords
flange
joint
pressing
holding member
flange portion
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JP6910612B2 (en
Inventor
信夫 宗友
Nobuo Munetomo
信夫 宗友
光信 矢野
Mitsunobu Yano
光信 矢野
忍 安井
Shinobu Yasui
忍 安井
尚毅 海道
Naotake Kaido
尚毅 海道
酒井 篤史
Atsushi Sakai
篤史 酒井
充弘 森
Mitsuhiro Mori
充弘 森
酒井 大介
Daisuke Sakai
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 JP2019046278A external-priority patent/JP6747678B2/en
Application filed by Taisei Kiko Co Ltd, Okayama City Office filed Critical Taisei Kiko Co Ltd
Priority to JP2020127572A priority Critical patent/JP6910612B2/en
Publication of JP2020180705A publication Critical patent/JP2020180705A/en
Priority to JP2021104897A priority patent/JP7123325B2/en
Application granted granted Critical
Publication of JP6910612B2 publication Critical patent/JP6910612B2/en
Priority to JP2022119753A priority patent/JP7355898B2/en
Priority to JP2023152524A priority patent/JP2023168389A/en
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Abstract

To rationally configure a joint portion reinforcing structure that can reliably reinforce a flange joint portion.SOLUTION: A joint portion reinforcing structure reinforces a joint portion where a first flange portion 1B projecting outward in a diametrical direction from an end portion of a first cylindrical member and a second flange portion projecting outward in a diametrical direction from an end portion of a second cylindrical member are joined by a coupling bolt 7A. The joint portion reinforcing structure is equipped with a reinforcing jig P that has a first clipping member 6 including a first pressing portion 6B pressing an outside surface 1d of the first flange portion 1B, a second clipping member including a second pressing portion pressing an outside surface of the second flange portion, and a fastening mechanism 8. The first cylindrical member is formed with a bulging portion 1b bulging out from a cylinder body at a position between the coupling bolts 7A, and the reinforcing jig P is installed to the joint portion so that the first pressing portion 6B presses a side area in a circumferential direction on the bulging portion 1b when viewed from a joint direction.SELECTED DRAWING: Figure 5

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。 The present invention relates to a joint portion reinforcing structure provided with a reinforcing jig for reinforcing the joint portion between flange portions protruding in the outer diameter direction from the end portions of both tubular 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 describes a pair of holding members having pressing portions that separately contact the pair of flange joints, and a fastening mechanism that pulls and fixes both holding members in the joining direction of the joints. A configuration with and 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。 Further, one holding member is formed with a C-shaped dropout prevention arm that comes into contact with the head or nut of the connecting bolt connecting both flange portions from the inward direction. The fall-out prevention arm prevents the reinforcing jig from falling off from both flange portions.

特開2014−141995号公報Japanese Unexamined Patent Publication No. 2014-141995

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 housed in the valve box, a short pipe for preventing the valve body from coming off is fixed to the valve box with a bolt, and this fixing part is in the outer diameter direction from the valve box or the short pipe. It may form a bulging part that bulges out. In this case, the circumferential distance between the head of the connecting bolt or the like existing in the flange of the short pipe or the like and the bulging portion is narrow, and the pressing portion of the reinforcing jig cannot be sufficiently inserted in the gap.
As a result, the portion of the reinforcing jig facing the outer peripheral surfaces of both flange portions may be greatly separated from both flange portions, and the reinforcing jig may fall off. Moreover, due to this separation, when the two sandwiching members are fastened with bolts or the like, the two sandwiching members rotate together and are easily displaced, and it is 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, the space inside the diameter of the connecting bolts placed on both flanges is often narrower than the head of the connecting bolts. It cannot be hooked on a part or the like. Therefore, if an unexpected external force is applied to the reinforcing jig, the reinforcing jig may fall off. In addition, the repair valve is formed with an operation handle for opening and closing the valve body in the out-of-diameter direction, 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。 Therefore, an object of the present invention is 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を含む第一挟持部材と、前記第二フランジ部の外側面を押圧する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、を有する補強治具を備え、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、前記補強治具は、前記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 is a first flange portion protruding outward from the end of the first tubular member and a second flange protruding outward from the end of the second tubular member. In the joint portion reinforcing structure for reinforcing the joint portion in which the flange portion is joined with a connecting bolt, the first holding member including the first pressing portion that presses the outer surface of the first flange portion and the outside of the second flange portion. The second holding member including the second pressing portion that presses the side surface, the first holding member, and the second holding member are fixed close to each other in the joining direction of the first flange portion and the second flange portion. The first tubular member is provided with a fastening mechanism and a reinforcing jig having a fastening mechanism, and the center of the plurality of connecting bolts protrudes outward from the center line connecting the centers of the first tubular member in the circumferential direction. A bulging portion that bulges from the cylinder body is formed at a position between the plurality of connecting bolts so that the reinforcing jig has the first pressing portion in the bulging portion in the joining direction view. It is at a point where it is attached to the joint so as to press the lateral 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。 According to this configuration, the reinforcing jig is attached to the joint so that the first pressing portion presses the lateral region of the bulging portion of the first tubular member, so that the flange joint is surely reinforced. It becomes.

他の特徴構成は、前記補強治具において、前記第一挟持部材または前記第二挟持部材には、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、前記第一挟持部材または前記第二挟持部材のうち、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, the first holding member or the second holding member has a contact portion capable of contacting at least one of the first tubular member and the second tubular member. Is formed, and the contact portion is the circumference of the inner surface of the first holding member or the second holding member that faces at least one outer peripheral surface of the first flange portion and the second flange portion. It is formed at at least one end along the direction so as to project in the in-diameter direction, and is at a point where it comes into contact with at least one of the first flange portion and the second flange portion.

本構成によると、両挟持部材を締結機構で固定する際、両挟持部材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、第一挟持部材または第二挟持部材の内表面の端部に、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, when both holding members are fixed by the fastening mechanism, even if both holding members try to rotate, the contact portion abuts on at least one of the first flange portion and the second flange portion, and the rotation is prevented. To. As a result, the reinforcing jig is mounted at an appropriate position, so that a desired pressing force can be exerted. Further, since the abutting portion has a simple structure such that it is formed at the end of the inner surface of the first sandwiching member or the second sandwiching member so as to project in the inward direction, it is easy to process.

他の特徴構成は、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。本構成では、連結ボルトの両側を押圧するので押圧面積を広く確保することが可能となり、フランジ接合部の補強が確実なものとなる。他の特徴構成は、前記第二挟持部材は、前記第二フランジ部に配置される前記連結ボルトの頭部またはナットにおける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二押圧部を有し、前記二つの第二押圧部は、多角形状に形成された前記頭部または前記ナットの一辺に対向する面を、前記一辺に沿った形状に構成している点にある。 Another characteristic configuration is that the first holding member has two first pressing portions that press the regions on both sides of the bulging portion along the circumferential direction. In this configuration, since both sides of the connecting bolt are pressed, a wide pressing area can be secured, and the flange joint is surely reinforced. Another characteristic configuration is that the second holding member has two second pressing portions that press on both sides of the head or nut of the connecting bolt arranged on the second flange portion along the circumferential direction. The two second pressing portions are formed so that a surface of the head or the nut, which is formed in a polygonal shape, faces one side of the head or the nut is formed in a shape along the one side.

本構成のように、二つの第二押圧部に連結ボルトの頭部等の多角形状の一辺に沿った対向面を形成すれば、両挟持部材を締結機構で固定する際や補強治具に予期せぬ外力が作用した際、仮に補強治具が回転したとしても、該対向面が連結ボルトの一辺に当接して回転を未然に阻止することができる。つまり、両フランジ部に締付固定された連結ボルトの締結力が、補強治具の回転を阻止する抵抗力となる。その結果、補強治具のフランジ接合部に対する固定姿勢を長期に亘って安定させることができる。また、補強治具を締付固定した後に連結ボルトを増し締めする場合でも、連結ボルトの頭部に第二押圧部が当接するので、ナットのみを締め付ければボルトの共回りが防止され、締付作業が効率的である。 If the two second pressing portions are formed with facing surfaces along one side of a polygonal shape such as the head of a connecting bolt as in this configuration, it is expected to be used when fixing both holding members with a fastening mechanism or as a reinforcing jig. Even if the reinforcing jig rotates when an external force is applied, the facing surface can come into contact with one side of the connecting bolt to prevent the rotation. That is, the fastening force of the connecting bolts tightened and fixed to both flange portions becomes the resistance force that prevents the rotation of the reinforcing jig. As a result, the fixed posture of the reinforcing jig with respect to the flange joint can be stabilized for a long period of time. Also, even when the connecting bolt is tightened after tightening and fixing the reinforcing jig, the second pressing part comes into contact with the head of the connecting bolt, so tightening only the nut prevents the bolt from rotating together and tightening. The attachment work is efficient.

筒状部材の分解斜視図である。It is an exploded perspective view of a tubular member. 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。It is a vertical cross-sectional view which shows the state which attached the reinforcing jig to the flange part of the tubular member. 図2のIII−III矢視図である。It is a view of the arrow III-III of FIG. 図2のIV−IV矢視図である。FIG. 2 is a view taken along the line IV-IV in FIG. 図2のV−V矢視図である。It is a VV arrow view of FIG. 図2のVI−VI矢視図である。It is a VI-VI arrow view of FIG. 第一挟持部材の概略構成を示す図である。It is a figure which shows the schematic structure of the 1st holding 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 the schematic structure of the 2nd holding 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。It is a perspective view of the reinforcing jig which concerns on another Embodiment 1. FIG. 別実施形態2に係る補強治具の斜視図である。It is a perspective view of the reinforcing jig which concerns on 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。 Hereinafter, embodiments of the joint reinforcing jig according to the present invention will be described with reference to the drawings. In the present embodiment, as an example of the reinforcing jig P, a repair valve X (an example of a first tubular member or a second tubular member) and an air valve L (an example of a first tubular member) or a branch pipe M (an example). A case of reinforcing the flange joint with the second tubular member) will be described. However, the present invention is not limited to the following embodiments, and various modifications can be made without departing from the gist thereof.

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 in which the repair valve X, the air valve L, and the branch pipe M are joined. As shown in FIG. 1, the repair valve X includes a cast iron valve box Xa for accommodating a valve body (not shown) and a cast iron short pipe Xb. After the valve body is housed in the valve box Xa, the valve box Xa and the short pipe Xb are joined by the embedding bolt 4. In the short pipe Xb, a plurality of through holes 3a (4 locations in the present embodiment) penetrating in the joining direction (axial direction) are formed in the circumferential direction, and a groove 3d for accommodating the head portion 4a of the embedded bolt 4 is formed. Has been done. Further, in the valve box Xa, holes 3b having one ends closed (four places in the present embodiment) are formed 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 embedding bolt 4 to the closed end surface of the hole portion 3b, the valve box Xa and the short pipe Xb can be connected. Be joined.

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 (4 locations in the present embodiment) bulging from the repair valve X in the out-of-diameter direction are formed in the circumferential direction. The embedded bolt 4 in the present embodiment shows an example of a hexagon socket head cap screw having a circular head 4a having a hexagonal hole formed, but for example, both screw bolts may be tightened with nuts. There is no particular limitation.

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 a state of being interposed. A disk-shaped flange portion 1A (an example of the second flange portion, hereinafter referred to as "second flange portion 1A") is formed so as to protrude in the outer diameter direction at one end of the repair valve X, and the second flange portion 1A is formed. , It is joined to the disk-shaped flange portion La (an example of the first flange portion, hereinafter referred to as "first flange portion La") protruding outward from the end of the air valve L with a connecting bolt 7. On the other hand, a disk-shaped flange portion 1B (an example of the first flange portion, hereinafter referred to as "first flange portion 1B") is formed so as to project in the outer diameter direction at the other end of the repair valve X, and the first flange portion 1B is formed. The portion 1B is joined to the disk-shaped flange portion Ma (an example of the second flange portion, hereinafter referred to as “second flange portion Ma”) protruding outward from the end of the branch pipe M with a connecting bolt 7. To.

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。 In both flange portions 1A and 1B of the repair valve X, a plurality of through holes 1a and 1a (four locations each in the present embodiment) penetrating in the joining direction are formed at equal intervals in the circumferential direction, and the first of the air valves L. A plurality of through holes 2a and 2b (four locations each in the present embodiment) penetrating in the joining direction are formed at equal intervals in the circumferential direction in the one flange portion La and the second flange portion Ma of the branch pipe M, respectively. ing. With the through holes 1a and 1a of both flanges 1A and 1B of the repair valve X and the through holes 2a and 2b of the first flange La of the air valve L and the second flange Ma of the branch pipe M overlapped with each other. It is joined using the connecting bolt 7. In this embodiment, an example of joining the connecting bolt 7 to the four through holes is shown, but the through holes such as six or eight are formed according to the outer diameter of the flange joint. Yes, and is 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 polygonal (hexagonal in the present embodiment) head 71a and a bolt portion 71 having a male threaded portion, and a polygonal (hexagonal in the present embodiment) first nut 72. There is. Further, the second connecting bolt 7B includes a bolt portion 71 and a second nut 73 having a polygonal shape (hexagonal in the present embodiment) that is bulkier than the first nut 72. Although the details will be described later, the second connecting bolt 7B is used at the place where the reinforcing jig P is joined with the connecting bolt 7 sandwiched between them. The first connecting bolt 7A and the second connecting bolt 7B may each have the same standard, or each bolt portion 71 may have a different standard. Further, the head 71a and the nuts 72 and 73 of the bolt portion 71 may be formed in a circular shape, or an embedded bolt structure may be used instead of the bolt-nut structure, and the present invention is not particularly limited.

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 side opposite to 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 is the outer surface 1c. , 1d, and the radial outer surfaces of both flange portions 1A and 1B will be described as outer peripheral surfaces 1e and 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 radial outer surface is the outer peripheral surface 2e. In the second flange portion Ma of the branch pipe M, the surface exposed on the side opposite to the joint surface facing the first flange portion 1B of the repair valve X is defined as the outer surface 2d, and the radial outer surface is defined as 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。
[Joint between air valve L and repair valve X]
A reinforcing jig P at a flange joint between the air valve L and the repair valve X will be described with reference to FIGS. 2 to 4 and 7 to 9. Here, in the relationship between the air valve L and the repair valve X, the air valve L will be described as a first tubular member, and the repair valve X will be described as a second tubular member. As shown in FIG. 2, the reinforcing jig P is attached to the joint portion 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 to 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. Presses the first holding member 6 provided with the two pressing portions 6B and 6B (an example of the first pressing portion, hereinafter referred to as "first pressing portion 6B") and the outer surface 1c of the second flange portion 1A. It includes a second holding member 5 having two pressing portions 5C and 5C (an example of the second pressing portion, hereinafter referred to as "second pressing portion 5C"). Further, the fastening mechanism 8 is provided to pull (close) the first holding member 6 and the second holding member 5 in the joining direction of both flange portions La and 1A to tighten and fix them. The pressing surfaces 6e and 5e facing the flanges La and 1A of the pressing portions 6B and 5C are formed with fine irregularities on the pressing surfaces 6e and 5e, for example, and the outer surfaces 2c of the flange portions La and 1A are formed. , 1c may be subjected to friction processing 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 a trapezoidal shape in which the outer surface 6a and the inner surface 6b increase in diameter as they approach the first flange portion La in a cross-sectional view (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 from one side of the four sides of the outer surface 6a of the inserted portion 6A in a bifurcated shape.

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 tubular internal space 6c for receiving the insertion portion 5A of the second sandwiching member 5, which will be described later, is formed along the joining direction of both flange portions La and 1A (FIG. 7 (a). ) VIIb-VIIb (see FIG. 7B). That is, as shown in FIG. 9, when the reinforcing jig P is mounted on both flange portions La, 1A, it is attached to the second holding member 5 at a position radially outside the outer peripheral surface 2e of the first flange portion La. The insertion portion 5A is formed, and the first sandwiching member 6 is formed with an inserted portion 6A that internally receives the insertion portion 5A 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 tubular internal space 6c is formed in a trapezoidal shape in a cross-sectional view, and is formed to be slightly larger than the outer diameter of the trapezoidal insertion portion 5A. Therefore, 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 insertion portion 6A makes the insertion portion 5A into the tubular internal space 6c of the insertion portion 6A. When inserted, it can slide in the insertion direction (longitudinal direction of the tubular internal space 6c), but relative rotation around the insertion direction (around the axis along the longitudinal direction of the tubular internal space 6c) becomes impossible. Is formed like this.

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 tubular internal 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 internal space 6c where the first pressing portion 6B is formed, the insertion hole 6d into which the male screw portion 8a of the fastening bolt 8A can be inserted and the head portion 8b cannot be inserted forms the bottom of the inserted portion 6A. An opening is formed in a penetrating state. In the state where the male screw portion 8a of the fastening bolt 8A is inserted into the insertion hole 6d, a predetermined gap is formed between the outer peripheral surface of the male screw portion 8a and the inner peripheral surface of the insertion hole 6d ( (See Fig. 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 in a lateral view (see FIG. 7A), and is formed in a tapered shape that moves away from the insertion hole 6d toward the tip side in a vertical cross-sectional view. (See FIG. 7 (b)). Further, the tip portion of the first pressing portion 6B on the opening side of the tubular internal 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 the 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 accommodating the second nut 73. The accommodating portion 6f is formed. When both holding members 6 and 5 are attached to both flange portions La and 1A from the outside diameter direction, the first pressing portion 6B is attached to the first flange portion La while the nut accommodating portion 6f does not abut on the second nut 73. The outer side surface 2c will be pressed. Further, the pressing surface 6e of the first pressing portion 6B presses the vicinity of the second connecting bolt 7B which is radially outside the sealing member 21 interposed between the first flange portion La and the second flange portion 1A. It will be. 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 portions 6A of the first holding member 6 are provided at both ends along the circumferential direction of the outer peripheral surface 2e of the first flange portion La and the inner surface (outer surface 6a) facing the outer peripheral surface 1e of the second flange portion 1A. It is formed so as to project in the in-diameter direction, and has a contact portion 6h capable of contacting both flange portions La and 1A (see FIG. 7C). 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 contact portion 6h comes into contact with both flange portions La and 1A, so that the rotation of the reinforcing jig P is prevented. The contact portion 6h may be provided only at one end of the inner surface of the first flange portion La facing the outer peripheral surface 2e in the direction in which the reinforcing jig P rotates. Further, the contact portion 6h may be provided only on the inner surface facing the outer peripheral surfaces 2e and 1e of either the outer peripheral surface 2e of the first flange portion La or the second flange portion 1A. Further, the shape of the contact portion 6h may be any shape such as being formed by 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 sandwiching member 5 is composed of a metal member, and includes an insertion portion 5A, a collar-shaped portion 5B extending outward from the outer surface 5a of the insertion portion 5A over the entire circumference. A second pressing portion 5C extending outward from one of the four sides of the flange-shaped 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 a cross-sectional view, and the inner surface 5b is formed in a circular bottomed square tube shape (FIG. 8 (c). ) 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 tubular internal space 5c through which the male screw portion 8a of the fastening bolt 8A can be inserted is formed. The inner diameter of the tubular internal 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-shaped portion 5B is formed in a trapezoidal shape in a cross-sectional view perpendicular to the joining direction, and a tubular internal space 5c is formed 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 tubular internal space 5c, an opening is formed on the side where the flange-shaped portion 5B and the second pressing portion 5C are formed, and a fastening bolt is formed on the side opposite to the side where the flange-shaped portion 5B and the second pressing portion 5C are formed. A female screw portion 5d into which the male screw portion 8a of 8A can be screwed is formed with an opening in a state of penetrating the bottom portion of the insertion portion 5A (FIG. 8B-VIIIb in FIG. 8A). b) See). That is, the female screw portion 5d is formed on the inner surface 5b of the tubular internal space 5c in the insertion portion 5A at an end portion opposite to the side on which the flange-shaped 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 in the side view (see FIG. 8A), and has a tapered shape that inclines toward the female screw portion 5d side toward the tip side in the vertical cross-sectional view. (See FIG. 8 (b)). Further, the tip portion of the surface of the second pressing portion 5C on the female screw portion 5d side 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 the regions on both sides of the head 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. It is configured in. Further, a contact surface 5g that comes into contact with the head 71a formed in a polygonal shape along both opposite sides is provided. 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 abuts on both flange portions La and 1A, the rotation of both holding members 6 and 5 is prevented. Will be done. In addition, by bringing the contact surface 5g of the second pressing portion 5C into contact with both sides of the head 71a, the fastening force of the second connecting bolt 7B acts to reliably prevent the rotation of both holding members 6 and 5. Can be done. In the present embodiment, the contact surface 5g is brought into contact with the head 71a along both opposing sides, but at least the surface facing one side of the head 71a is in a non-contact state close to one side of the head 71a. It suffices if they are formed in parallel.

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, and the washer member 71c is interposed in the second pressing portion 5C. A housing portion 5h for accommodating the washer member 71c is notched (see FIG. 8C). As a result, the second holding member 5 was inserted into the second flange portion 1A without being disturbed by the washer member 71c, and both opposite sides of the head 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 the present embodiment, the washer member 71c is also interposed between the head 71a and nuts 72 and 73 of the first connecting bolt 7A and the outer surfaces 2c and 1c of both flange portions La and 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 above-mentioned fastening bolt 8A inserted into the tubular 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. It is composed of the female screw portion 5d. The fastening bolt 8A has a male screw portion 8a and a polygonal (hexagonal in this embodiment) head 8b. The fastening bolt 8A is not limited to the hexagon bolt, and may have any form such as a hexagon socket head cap screw.

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 work process of mounting the reinforcing jig P on the joint portion of both 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 flange portions La and 1A are removed, replaced with first connecting bolts 7A and second connecting bolts 7B, and temporarily tightened. Next, at a position radially outside the outer peripheral surfaces 2e and 1e of both flange portions La and 1A, the insertion portion 5A of the second sandwiching member 5 is inserted into the tubular internal space 6c of the inserted portion 6A of the first sandwiching member 6. Insert along the joining direction. At that 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 cannot be relatively rotated in the cross-sectional view, the second pressing portion 5C of the second holding member 5 and the first It can be easily inserted in a state where the first pressing portion 6B of the holding member 6 is positioned in a desired relative positional relationship extending in the same direction.

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 into the tubular internal space 6c from the outside of the inserted portion 6A in the joining direction through the insertion hole 6d and temporarily fixed. In the engagement between the insertion portion 5A and the insertion portion 6A and the temporary fixing of the fastening bolt 8A, 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 performed so as to be slightly larger than the distance between the outer surface 2c of La and the outer surface 1c of the second flange portion 1A. That is, the size (insertion distance) of the overlapping portion between the insertion portion 5A and the insertion portion 6A in the joining direction and the distance between the pressing surface 5e and the pressing surface 6e can be appropriately set. Therefore, even if the wall thickness is changed according to the nominal diameter and design pressure of both flange portions La, 1A, by adjusting the size of the overlapping portion, both holding members 6 and 5 can be attached to both flange portions La, It can be satisfactorily tightened and fixed to 1A.

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 flange portions La, 1A from the outside diameter so that the pressing portions 6B and 5C of both holding members 6 and 5 are located on both sides of the second connecting bolt 7B, and is inserted. The outer surface 6a of the portion 6A is brought into contact with at least one of the outer peripheral surfaces 2e and 1e of both flange portions La and 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 brought into the outer surface 1c of the second flange portion 1A. The insertion portion 5A and the insertion portion 6A are pulled in the joining direction until they are brought into contact with each other. 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 accommodated in the accommodating 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 to finally fix it. At this time, since the fastening bolt 8A is located at a position radially outside of both flange portions La and 1A, the tightening work is easy. On the other hand, with the tightening work of the fastening bolt 8A, both holding members 6 and 5 may rotate relative to both flange portions La and 1A, and both holding members 6 and 5 may 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 the present embodiment has the contact portion 6h at the end of the outer surface 6a facing the outer peripheral surfaces 2e and 1e of both flange portions La and 1A, the contact portion 6h is the both flange portions La. , 1A can be contacted to prevent the rotation of both holding members 6 and 5. Moreover, since the contact surface 5g of the second pressing portion 5C is in contact with both sides of the head 71a, the fastening force of the second connecting bolt 7B acts to prevent the rotation of both holding members 6 and 5 in advance. Can be done. As a result, the tightening work of the fastening bolt 8A becomes easier, and the mounting postures of both holding members 6 and 5 can be stabilized. It should be noted that the fastening bolt 8A may not be temporarily fixed as described above, but may be finally fixed only.

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 finally fixed to both flange portions La, 1A, the other reinforcing jig P is also finally fixed by repeating the same operation. Then, after the reinforcing jigs P are mainly fixed to the two positions of the second connecting bolts 7B arranged to face the outer surfaces 2c and 1c of both flange portions La and 1A, all the first connecting bolts 7A and the second The connecting bolt 7B is finally fixed, and the mounting of the reinforcing jig P is completed. At this time, since the second connecting bolt 7B is composed of a high nut type, the tightening work is easy. Further, since the contact surface 5g of the second pressing portion 5C comes into contact with the head 71a of the second connecting bolt 7B, tightening only the second nut 73 prevents the bolt portion 71 from rotating together, and the tightening work is efficient. Is the target. The order of the main fixing of the reinforcing jig P and the main fixing of the first connecting bolt 7A and the second connecting bolt 7B may be changed as appropriate, or may be repeated. Further, in the present embodiment, an example in which the reinforcing jig P is attached to two of the four connecting bolts 7 is shown, but one or three or more connecting bolts 7 are attached depending on the required strength of the joint. The 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 way, the insertion portion 5A is fixed to the inside of the inserted portion 6A in a state where the pressing portions 6B and 5C of both holding members 6 and 5 are in contact with the outer surfaces 2c and 1c of both flange portions La and 1A. , The insertion portion 5A and the insertion portion 6A are overlapped in the joining direction. For this reason, when a shearing force that causes both flange portions La, 1A to be displaced in the radial direction acts, or a tensile force that pulls both flange portions La, 1A apart in the axial direction acts, the pressing portions 6B, 5C open in the opening direction. Even when a force is received, these forces are received not only at the fastening portion of the fastening mechanism 8 but also at the overlapping portion between the insertion portion 5A and the inserted portion 6A, so that 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。 Further, since the female screw portion 5d of the insertion portion 5A is located at a position close to the head portion 8b of the fastening bolt 8A, the screwed portion between the female screw portion 5d and the male screw portion 8a of the fastening bolt 8A is fastened. The head 8b of the bolt 8A is close to the position where it comes into contact with 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 screwed 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, the fastening bolt 8A can be satisfactorily prevented from stretching or breaking.

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。 Further, since the female screw portion 5d is located at the overlapping portion between the insertion portion 5A and the inserted portion 6A in the tubular internal space 6c, the length of the fastening bolt 8A can be relatively shortened. .. Moreover, in the present embodiment, at the radial outer positions of the outer peripheral surfaces 2e and 1e of both flange portions La and 1A, the locations where the insertion portion 5A and the inserted portion 6A are arranged and the locations where the fastening bolts 8A are arranged are the same. become. As a result, both the dimensions in the joining direction and the dimensions in the radial direction of the reinforcing jig P and the fastening bolt 8A mounted on both flange portions La and 1A can be reduced, and space can be saved. it 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 way, the joints of both flange portions La and 1A can be reliably reinforced. At this time, by providing the first holding member 6 and the second holding member 5 with the bifurcated first pressing portion 6B and the second pressing portion 5C, the connecting bolts of the outer surfaces 2c and 1c of both flange portions La and 1A are provided. Even when the space inside the diameter of 7 is narrow, the reinforcing jig P can be easily mounted from the outside diameter. Moreover, since the inner surface 6b of the inserted portion 6A and the outer surface 5a of the insertion portion 5A are formed in a trapezoidal shape whose diameter increases as they approach the second flange portion 1A, a wide pressing area of the pressing portions 6B and 5C is secured. be able to. As a result, the reinforcing strength of the flange joint 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。
[Joint part between repair valve X and branch pipe M]
5 to 6 and 10 show an embodiment in which the reinforcing jig P is attached to the joint between the repair valve X and the branch pipe M. In addition, only the configuration different from the embodiment in which the reinforcing jig P is attached to the joint portion between the air valve L and the repair valve X described above will be described. Here, in the relationship between the repair valve X and the branch pipe M, the repair valve X will be described as a first tubular member, and the branch pipe M will be described as a 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。 At the joint between the air valve L and the repair valve X described above, a joint between the repair valve X and the branch pipe M is formed at a predetermined interval (for example, the joint surface interval is 100 mm to 400 mm). As shown in FIGS. 3 and 5, the reinforcing jig P mounted on the joint portion is positioned in the circumferential direction with respect to the reinforcing jig P mounted on the joint portion between the air valve L and the repair valve X. They are arranged with a shift of about 45 degrees. That is, even when the joint surface spacing defined by the repair valve X is small, the reinforcing jigs P arranged above and below do not interfere with each other, so that it is possible to reinforce the flange joint portion having any joint surface spacing. The position of each reinforcing jig P in the vertical direction in the circumferential direction is not limited to being arranged by being shifted by about 45 degrees, and may be arranged by being shifted by, for example, 30 degrees, and may be arranged at any angle. , It is not necessary to shift the position of each reinforcing jig P in the vertical direction 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, the repair valve X for shallow burial in recent years has a particularly narrow joint surface spacing. 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 outer surface 2d side of the second flange portion Ma. That is, by installing the reinforcing jig P fixed to the joint portion between the repair valve X and the branch pipe M shown in FIG. 2 upside down, the head portion 8b of the fastening mechanism 8 occupies the space between the joint surfaces. Therefore, it is possible to prevent interference between the reinforcing jigs P. As a result, it is not necessary to shift the position of each reinforcing jig P in the vertical direction in the circumferential direction, and the final fixing of the fastening mechanism 8 and the main fixing of the connecting bolt 7 are performed from the outer surface 2d side of the second flange portion Ma. It is efficient because you can work.

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。 In the joint direction view as shown in FIG. 5, a plurality of bulging portions 1b bulging outward from the cylinder body of the repair valve X are arranged in the circumferential direction at the joint portion between the repair valve X and the branch pipe M. Has been done. Further, a plurality of first connecting bolts 7A are arranged between the bulging portions 1b. Therefore, the distance 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 distance. Therefore, in the present embodiment, the first pressing portion 6B of the first holding member 6 presses the regions on both sides of the bulging portion 1b along the circumferential direction. As a result, when the reinforcing jig P is inserted from the outer diameter directions of both flange portions 1B and Ma, the first pressing portion 6B can be sufficiently inserted.

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。 Further, in the present embodiment, as shown in FIG. 6, the second pressing portion 5C of the second holding member 5 is arranged at the portion where the connecting bolt 7 is not arranged. That is, by using the same reinforcing jig P as the reinforcing jig P used for the joint portion between the repair valve X and the branch pipe M, mass production is achieved and the manufacturing cost is saved. In the present embodiment, since the reinforcing jig P is attached to the portion where the connecting bolt 7 does not exist, a single second pressing portion 5C is not formed on the second holding member 5 and a single second pressing portion 5C is formed. It may be composed of 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, the work process of mounting the reinforcing jig P will be briefly described with reference to FIG. First, a plurality of existing bolts (not shown) at the joints of both flange portions 1B and Ma are removed, replaced with first connecting bolts 7A, and temporarily tightened. Next, the insertion portion 5A is inserted into the tubular internal space 6c of the inserted portion 6A along the joining direction at a position radially outside the outer peripheral surfaces 1f and 2f of both flange portions 1B and Ma. Next, the fastening bolt 8A is inserted into the tubular internal space 6c from the outside of the inserted portion 6A in the joining direction 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 flange portions 1B and Ma from the outer diameter 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 inserted into both flanges. The portions 1B and Ma are brought into contact with at least one of the outer peripheral surfaces 1f and 2f. Next, the male screw portion 8a of the fastening bolt 8A is screwed into the female screw portion 5d of the insertion portion 5A inserted into the tubular internal space 6c, and the head portion 8b of the fastening bolt 8A is on the upper surface of the inserted portion 6A. This is fixed until it comes into contact with 6 g. At this time, also in the present embodiment, both holding members are provided by providing the contact portion 6h at the end of the outer surface 6a facing the outer peripheral surfaces 1f and 2f of both flange portions 1B and Ma among the first holding members 6. It is possible to prevent the rotation of 6 and 5. The U-shaped inner peripheral surface (nut accommodating portion 6f) sandwiched between the two first pressing portions 6B is configured to follow the outer peripheral shape of the bulging portion 1b, and the inner peripheral surface of the first pressing portion 6B is formed. May be a contact portion 6h that abuts the bulge portion 1b. In this case, the contact portion 6h provided at the end of the first sandwiching member 6 may be omitted, and the rotation of both sandwiching 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 finally fixed to both flange portions 1B and Ma, the other reinforcing jig P is also finally fixed by repeating the same operation. Then, after the reinforcing jigs P are mainly fixed to the two bulging portions 1b arranged so as to face the outer surfaces 1d and 2d of the flange portions 1B and Ma in the circumferential direction, all the first connecting bolts 7A are attached. After this fixing, the mounting of the reinforcing jig P is completed. Since the action and effect in this embodiment are the same as those in the above-described embodiment, 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。 Hereinafter, another embodiment according to the present invention will be described with reference to FIGS. 11 to 12 only in a configuration different from the above-described embodiment. In addition, in order to facilitate understanding of the drawings, the same members will be 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 the present embodiment, the polygonal protrusion 61 is provided on the outer surface (outer surface 6a) on the side opposite to the flange joint portion of the first holding member 6. When both holding members 6 and 5 are inserted into the flange joint and finally fixed by the fastening mechanism 8, for example, if the fastening bolt 8A of the fastening mechanism 8 is tightened while sandwiching the protrusion 61 with a wrench (not shown), the reinforcement is cured. The rotation of the tool P can be prevented. The protrusion 61 may be provided on the side surface located on the back side of the fastening bolt 8A in the tightening rotation direction, and is not particularly limited as long as it can be held by a wrench or the like. Further, the protrusion 61 is not limited to a polygonal shape, and may have 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。
[Separate Embodiment 2]
As shown in FIG. 12, in the present embodiment, a polygonal protrusion 62 having a groove 62a formed in the center is provided on the outer surface of the first sandwiching member 6 on the side opposite to the flange joint. After temporarily fixing the plurality of reinforcing jigs P inserted into the flange joints by the fastening mechanism 8, a holding member 63 composed of a chain or the like is engaged with the groove portion 62a over each reinforcing jig P and operated. The reinforcing jig P is pressed in the radial direction by pulling the holding member 63 by hand with the tool 64. Next, if both holding members 6 and 5 are finally fixed by the fastening mechanism 8, the rotation of the reinforcing jig P can be prevented. Then, if the holding member 63 is removed, the plurality of reinforcing jigs P are arranged in a desired posture with respect to the flange joint portion. It should be noted that the holding member 63 may be installed without being removed. In this case, the fixed posture 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 sandwiching member 6 integrally comprises the inserted portion 6A and the first pressing portion 6B, but the inserted portion 6A and the first pressing portion 6B are made of separate members. It 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, the first pressing portion 6B is linearly moved by screwing a bolt, and both holding members 6 and 5 are brought close to the flange joint portion. It is assumed that it will be fixed. Further, the first pressing portion 6B may be moved by a wedge member or the like, and the method of fixing the holding members 6 and 5 in close proximity to the flange joint portion may be in any form. Further, the second pressing portion 5C of the second holding member 5 may be composed of 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 two holding members 6 and 5 are finally fixed by the fastening mechanism 8, a rubber member is attached to the surfaces of the pressing surfaces 6e and 5e to prevent the reinforcing jig P from rotating to obtain a desired frictional resistance. It may be a configuration to generate. In this case, the rubber member is crushed while preventing the reinforcing jig P from rotating, so that the adhesion of both holding members 6 and 5 to the flange joints can be improved.

(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 for restricting the movement of the plurality of both holding members 6 and 5 mounted on the flange joint in the out-of-diameter direction may be provided over the plurality of reinforcing jigs P. The band member may be formed in a flat plate annular shape in which a through hole for accommodating the fastening bolt 8A is formed on the upper surface 6 g of the first holding member 6, or the upper surface 6 g of the first holding member 6 and the flange joint may be formed. A semi-annular member having an L-shaped cross section may be bolted to the outer surface on the opposite side, and various forms are assumed.

(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 sandwiching member 6, the second sandwiching member 5, and the fastening mechanism 8 in the above-described embodiment can be appropriately changed. For example, the second sandwiching member 5 is provided with the insertion portion 5A and the first sandwiching member 6 is provided with the inserted portion 6A, but the second sandwiching member 5 is provided with the inserted portion and the first sandwiching member 6 is provided with the inserted portion 6A. It may be configured to provide an insertion portion. In this case, the second sandwiching member 5 is formed with a contact portion 6h formed so as to project in the in-diameter direction at an end portion along the circumferential direction of the inner surface facing the outer peripheral surface of the flange joint portion. Further, the shape of the insertion portion 5A of the second sandwiching member 5 and the inserted portion 6A of the first sandwiching member 6 is trapezoidal in the cross-sectional view, but the insertion portion 5A has an elliptical shape or a rectangular shape in the cross-sectional view. Any shape may be used as long as the relative rotation around the joining direction is impossible in the state where the insertion portion 6A and the inserted portion 6A are inserted. Further, the shape of the first pressing portion 6B and the shape of the second pressing portion 5C may be the same. 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 bolt 7 for connecting the flange joints in the above-described embodiment is not limited to the hexagon bolt, and may have any form such as a double screw bolt or a hexagon socket head cap screw.

(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 in which the reinforcing jig P is fixed to the flange joint between the repair valve X and the air valve L or the branch pipe M is shown, but the flange joint between the hydraulic devices and the pipes, etc. Of course, the reinforcing jig P can be used for. Further, the repair valve X described above is only 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。 The joint reinforcing jig according to the present invention can be used as a jig for reinforcing the joint between the fluid equipment, the hydraulic equipment and the piping, the fluid equipments, or the 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 2nd flange 1B 1st flange 1b bulging 1c, 1d, 2c, 2d outer side surface 1e, 1f, 2e, 2f outer peripheral surface 5 second holding member 5A insertion part 5C second pressing part 5h accommodating part 6th 1 Holding member 6A Inserted part 6B First pressing part 6h Contact part 7 Connecting bolt 71a Head 71c Washer member 73 Nut 8 Fastening mechanism L Air valve (first tubular member)
La 1st flange M branch pipe (2nd tubular member)
Ma 2nd flange P Reinforcing jig X Repair valve (1st tubular member or 2nd 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を含む第一挟持部材と、
前記第二フランジ部の外側面を押圧する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、を有する補強治具を備え、
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、
前記補強治具は、前記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。
Reinforces the joint where the first flange portion protruding outward from the end of the first tubular member and the second flange protruding outward from the end of the second tubular member are joined with connecting bolts. In the joint reinforcement structure
A first holding member including a first pressing portion that presses the outer surface of the first flange portion, and
A second holding member including a second pressing portion that presses the outer surface of the second flange portion, and
A reinforcing jig having a fastening mechanism for fixing the first holding member and the second holding member so as to be close to each other in the joining direction of the first flange portion and the second flange portion is provided.
In the first tubular member, a position between the plurality of connecting bolts so that the center of the plurality of connecting bolts protrudes in the outer diameter direction from the center line connected in the circumferential direction of the first tubular member. A bulging part that bulges from the cylinder body is formed in
The reinforcing jig is a joint portion reinforcing structure mounted on the joint portion so that the first pressing portion presses a lateral region of the bulging portion along the circumferential direction in the joint direction view.
前記補強治具において、前記第一挟持部材または前記第二挟持部材には、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、前記第一挟持部材または前記第二挟持部材のうち、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, the first holding member or the second holding member is formed with a contact portion capable of contacting at least one of the first tubular member and the second tubular member.
The contact portion is at least along the circumferential direction of the inner surface of the first holding member or the second holding member that faces at least one outer peripheral surface of the first flange portion and the second flange portion. The joint reinforcing structure according to claim 1, which is formed at one end so as to project in the in-diameter direction and comes into contact with at least one of the first flange portion and the second flange portion.
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1又は2に記載の接合部補強構造。 The joint reinforcing structure according to claim 1 or 2, wherein the first holding member has two first pressing portions that press the regions on both sides of the bulging portion along the circumferential direction. 前記第二挟持部材は、前記第二フランジ部に配置される前記連結ボルトの頭部またはナットにおける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二押圧部を有し、
前記二つの第二押圧部は、多角形状に形成された前記頭部または前記ナットの一辺に対向する面を、前記一辺に沿った形状に構成している請求項1から3のいずれか一項に記載の接合部補強構造。
The second holding member has two second pressing portions that press on both sides of the head or nut of the connecting bolt arranged on the second flange portion along the circumferential direction.
Any one of claims 1 to 3 in which the two second pressing portions form a polygonal surface of the head or a surface of the nut facing one side in a shape along the one side. Joint reinforcement structure described in.
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0378190U (en) * 1989-11-30 1991-08-07
JPH0463891U (en) * 1990-10-11 1992-05-29
JPH08226586A (en) * 1995-02-22 1996-09-03 East Japan Railway Co Pipe with flange joint of same diameter
JP2004316767A (en) * 2003-04-16 2004-11-11 Tokyo Gas Co Ltd Flange connection part safety fixture, safety fixture for valve in pit, and safety method using these fixtures
JP2005147243A (en) * 2003-11-14 2005-06-09 Hitachi Metals Ltd Flange joint body for valve pit
JP2014141995A (en) * 2013-01-22 2014-08-07 Okayama City Flange-connecting portion reinforcement fixture
JP2015108402A (en) * 2013-12-04 2015-06-11 岡山市 Flange joint part reinforcing fixture

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0378190U (en) * 1989-11-30 1991-08-07
JPH0463891U (en) * 1990-10-11 1992-05-29
JPH08226586A (en) * 1995-02-22 1996-09-03 East Japan Railway Co Pipe with flange joint of same diameter
JP2004316767A (en) * 2003-04-16 2004-11-11 Tokyo Gas Co Ltd Flange connection part safety fixture, safety fixture for valve in pit, and safety method using these fixtures
JP2005147243A (en) * 2003-11-14 2005-06-09 Hitachi Metals Ltd Flange joint body for valve pit
JP2014141995A (en) * 2013-01-22 2014-08-07 Okayama City Flange-connecting portion reinforcement fixture
JP2015108402A (en) * 2013-12-04 2015-06-11 岡山市 Flange joint part reinforcing fixture

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