JP7330061B2

JP7330061B2 - Flange stiffener

Info

Publication number: JP7330061B2
Application number: JP2019192123A
Authority: JP
Inventors: 卓也東海林
Original assignee: Cosmo Koki Co Ltd
Current assignee: Cosmo Koki Co Ltd
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2023-08-21
Anticipated expiration: 2039-10-21
Also published as: JP2021067306A; JP2023159188A

Description

本発明は、接続部材と該接続部材の両側に接合される管路構成部材とのフランジ接合を補強するフランジ補強具に関する。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flange reinforcing tool that reinforces flange joints between a connecting member and pipeline constituent members joined to both sides of the connecting member.

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

このようにフランジ同士を接合する場合、経年による腐食や不等沈下、或いは地震等の外力などにより接合部分から流体管路内の流体が外側に漏れてしまう虞があった。そこで、特許文献１に示されるように、接続部材の両フランジにそれぞれ接合される管路構成部材のフランジにおいて、接続部材のフランジに接続される接続面とは反対側のフランジ面に当接するように一対の狭持部材を配置し、一対の狭持部材をボルトナットなどから構成される連結部材で管路軸方向に連結することで、接続部材と管路構成部材とのフランジ接合を補強するフランジ補強具が開発されている。このフランジ補強具は、下方の狭持部材側に頭部が配置されるように一対の狭持部材に渡って下方からボルトを挿通した後、ボルトの軸部に対して上方からナットを螺合させることにより、一対の狭持部材が近接して管路構成部材の両フランジが上下方向に狭持されるようになっている。 When the flanges are joined together in this way, there is a risk that the fluid in the fluid pipe may leak outside from the joined portion due to corrosion or unequal settlement due to aging or external force such as an earthquake. Therefore, as shown in Patent Literature 1, in the flanges of the pipeline constituting member which are respectively joined to both flanges of the connecting member, the flanges are arranged so as to abut against the flange surface on the opposite side of the connecting surface connected to the flanges of the connecting member. By arranging a pair of holding members in the pipe and connecting the pair of holding members in the pipeline axial direction with a connecting member composed of bolts and nuts, etc., the flange joint between the connecting member and the pipeline constituent member is reinforced. Flange stiffeners have been developed. In this flange reinforcing tool, after a bolt is inserted from below across a pair of holding members so that the head is arranged on the side of the lower holding member, a nut is screwed onto the shaft of the bolt from above. As a result, the pair of holding members come close to hold both flanges of the pipe structure member in the vertical direction.

特開２０１９－１４８３３７号公報（第７頁、第６図）JP 2019-148337 A (page 7, FIG. 6)

特許文献１のフランジ補強具にあっては、例えば、フランジ補強具が上部に開口部を有する狭隘な弁筐内に配置されている場合等であっても、開口部から近い位置でナットにアクセスでき、該ナットを螺合操作して一対の狭持部材を連結する作業を簡便に行えるようになっている。しかしながら、特許文献１のようなフランジ補強具にあっては、ボルトの軸部に対して上方からナットを螺合させると、ボルトが上方に移動するため、ナットよりもボルトの軸部が上方に突出して上方の管路構成部材に干渉してしまい、管路構成部材の両フランジを上下方向に十分に狭持できない虞があった。 In the flange reinforcing tool of Patent Document 1, for example, even when the flange reinforcing tool is arranged in a narrow valve housing having an opening at the top, the nut can be accessed at a position near the opening. The operation of screwing the nut to connect the pair of holding members can be easily performed. However, in the flange reinforcing tool as disclosed in Patent Document 1, when a nut is screwed onto the shank of the bolt from above, the bolt moves upward, so the shank of the bolt moves upward from the nut. There is a possibility that it will protrude and interfere with the upper duct forming member, so that both flanges of the duct forming member cannot be sufficiently clamped in the vertical direction.

本発明は、このような問題点に着目してなされたもので、管路構成部材の両フランジを上下方向に十分に狭持することができるフランジ補強具を提供することを目的とする。 SUMMARY OF THE INVENTION It is an object of the present invention to provide a flange reinforcing tool capable of sufficiently clamping both flanges of a pipeline constituting member in the vertical direction.

前記課題を解決するために、本発明のフランジ補強具は、
上下両端にフランジを有する接続部材の両フランジにそれぞれ接合される管路構成部材の両フランジを、環状を成す上下一対の狭持部材で狭持し、該一対の狭持部材を連結ボルトで上下方向に連結してフランジ接合を補強するフランジ補強具であって、
上方の狭持部材には前記連結ボルトの軸部を挿通可能であり、且つ該連結ボルトの頭部が周縁に係止可能な挿通部が形成されており、下方の狭持部材には前記連結ボルトが螺合可能な雌ネジ部が前記挿通部と上下方向に対応する位置に形成されていることを特徴としている。
この特徴によれば、連結ボルトの軸部を上方の狭持部材の挿通部に挿通させた状態で連結ボルトの頭部を上方から操作して連結ボルトの軸部を下方の狭持部材の雌ネジ部に螺合させることにより、下方の狭持部材が上方の狭持部材に近づくように移動され、上下一対の狭持部材により管路構成部材の両フランジが上下方向に狭持されるようになっており、連結ボルトの軸部が上方の狭持部材よりも上方に大きく突出しないので、連結ボルトの軸部が上方の管路構成部材に干渉することが回避され、管路構成部材の両フランジを上下方向に十分に狭持することができる。 In order to solve the above problems, the flange reinforcing tool of the present invention includes:
Both flanges of a pipeline construction member joined to both flanges of a connection member having flanges on both upper and lower ends are held by a pair of upper and lower annular holding members, and the pair of holding members are held vertically by connecting bolts. A flange stiffener that reinforces a flange joint by connecting in a direction,
The upper holding member is formed with an insertion portion through which the shaft portion of the connecting bolt can be inserted and the head portion of the connecting bolt can be locked to the peripheral edge. A female threaded portion into which a bolt can be screwed is formed at a position vertically corresponding to the insertion portion.
According to this feature, in a state in which the shaft portion of the connecting bolt is inserted through the insertion portion of the upper holding member, the head portion of the connecting bolt is operated from above to insert the shaft portion of the connecting bolt into the female portion of the lower holding member. By screwing it onto the threaded portion, the lower holding member is moved closer to the upper holding member, so that both flanges of the pipeline constituting member are vertically held by the pair of upper and lower holding members. Since the shaft portion of the connecting bolt does not protrude farther upward than the upper clamping member, the shaft portion of the connecting bolt is prevented from interfering with the upper duct forming member. Both flanges can be sufficiently clamped in the vertical direction.

前記下方の狭持部材に取付けられたナットに前記雌ネジ部が形成されていることを特徴としている。
この特徴によれば、下方の狭持部材に対して雌ネジ部を簡便に形成することができる。 It is characterized in that the female screw portion is formed in the nut attached to the lower holding member.
According to this feature, the female threaded portion can be easily formed in the lower holding member.

前記ナットは、回動規制手段と落下防止手段とにより前記下方の狭持部材に対して位置決めされていることを特徴としている。
この特徴によれば、ナットが回動規制手段と落下防止手段とにより下方の狭持部材に対して位置決めされているので、上方から連結ボルトをナットの雌ネジ部に螺合させる操作のみで一対の狭持部材を簡便に連結することができる。 The nut is characterized in that it is positioned with respect to the lower holding member by rotation restricting means and drop preventing means.
According to this feature, since the nut is positioned with respect to the lower holding member by the rotation restricting means and the fall prevention means, the pairing can be performed simply by screwing the connecting bolt into the female screw portion of the nut from above. holding members can be easily connected.

前記下方の狭持部材は、前記ナットを遊嵌状態で収容する収容部を有していることを特徴としている。
この特徴によれば、ナットと収容部との隙間を利用して上下一対の狭持部材のずれを吸収することができる。 The lower holding member is characterized in that it has an accommodating portion that accommodates the nut in a loosely fitted state.
According to this feature, the gap between the nut and the accommodating portion can be used to absorb the displacement of the pair of upper and lower holding members.

前記回動規制手段は、前記収容部の内壁であることを特徴としている。
この特徴によれば、収容部の内壁を利用してナットを回動規制することができるので構造を簡素にすることができる。 The rotation restricting means is characterized by being an inner wall of the accommodating portion.
According to this feature, the rotation of the nut can be restricted using the inner wall of the accommodating portion, so the structure can be simplified.

前記狭持部材は、周方向に分割された複数の分割体と、前記複数の分割体を結合する上下方向に延びる複数の結合ボルトと、を有し、前記分割体は、周方向両端に設けられる接合部を備え、前記分割体の前記接合部は、隣接する前記分割体の前記接合部と上下方向に重畳し、上側の前記接合部には前記結合ボルトを遊挿可能な挿通孔が設けられ、下側の前記接合部には前記結合ボルトの軸部が螺合可能な螺合部が設けられていることを特徴としている。
この特徴によれば、上方から結合ボルトの軸部を挿通孔に挿通させ、螺合部に螺合させることで簡便に狭持部材を構成できる。 The holding member has a plurality of divided bodies divided in the circumferential direction and a plurality of vertically extending connecting bolts connecting the plurality of divided bodies, and the divided bodies are provided at both ends in the circumferential direction. The joint portion of the divided body overlaps the joint portion of the adjacent divided body in the vertical direction, and the upper joint portion is provided with an insertion hole into which the connecting bolt can be loosely inserted. and a threaded portion into which the shaft portion of the coupling bolt can be screwed is provided in the joint portion on the lower side.
According to this feature, the holding member can be easily constructed by inserting the shaft portion of the coupling bolt through the insertion hole from above and screwing it into the threaded portion.

前記上方の狭持部材の結合ボルトと、前記下方の狭持部材の結合ボルトとは、上下方向に重畳する位置に配置されていることを特徴としている。
この特徴によれば、上下に対応する結合ボルトが１箇所外された上下の狭持部材と、連結ボルトとを仮組みした状態とすることで、上下の分割体が上下に対応する結合ボルトを中心として一体的に回動できるので、管路構成部材のフランジに簡便に設置することができる。 The connecting bolts of the upper holding member and the connecting bolts of the lower holding member are arranged so as to overlap each other in the vertical direction.
According to this feature, by temporarily assembling the upper and lower holding members from which one connecting bolt corresponding to the upper and lower sides has been removed and the connecting bolt, the upper and lower divided bodies can connect the connecting bolts corresponding to the upper and lower sides. Since it can be rotated integrally about the center, it can be easily installed on the flange of the pipeline component.

（ａ）は実施例におけるフランジ補強具を取付けた状態を示す側面図、（ｂ）はフランジ補強具の取付け対象となる補修弁と接続管及び分岐首部とを示す側面図である。(a) is a side view showing a state in which a flange reinforcing member is attached in the embodiment, and (b) is a side view showing a repair valve, a connecting pipe, and a branch neck to which the flange reinforcing member is attached. （ａ）はフランジ補強具を上方から見た斜視図、（ｂ）はフランジ補強具を下方から見た斜視図である。(a) is a perspective view of the flange reinforcement as seen from above, and (b) is a perspective view of the flange reinforcement as seen from below. （ａ）は第１狭持部材の分割体を示す上面図、（ｂ）は（ａ）の紙面下側から見た側面図、（ｃ）は第１狭持部材の分割体を示す下面図、（ｄ）は（ａ）の紙面右側から見た側面図、（ｅ）は（ｃ）の紙面下側から見た側面図である。(a) is a top view showing the divided body of the first holding member, (b) is a side view seen from the lower side of (a), and (c) is a bottom view showing the divided body of the first holding member. , (d) is a side view seen from the right side of (a), and (e) is a side view seen from the bottom side of (c). （ａ）は第２狭持部材の分割体を示す上面図、（ｂ）は（ａ）の紙面下側から見た側面図、（ｃ）は第２狭持部材の分割体を示す下面図、（ｄ）は（ｃ）の紙面右側から見た側面図、（ｅ）は（ｃ）の紙面下側から見た側面図である。(a) is a top view showing the divided body of the second holding member, (b) is a side view seen from the lower side of (a), and (c) is a bottom view showing the divided body of the second holding member. , (d) is a side view seen from the right side of (c), and (e) is a side view seen from the bottom side of (c). 仮組みしたフランジ補強具を上方から接続管及び分岐首部の位置まで移動させた状態を示す説明図である。FIG. 10 is an explanatory view showing a state in which the temporarily assembled flange reinforcement is moved from above to the positions of the connecting pipe and the branch neck. （ａ）は係合部材を示す上面図、（ｂ）は（ａ）の紙面下側から見た側面図、（ｃ）は（ｂ）の紙面左側から見た側面図、（ｄ）は係合部材を示す下面図、（ｅ）は（ｂ）の紙面右側から見た側面図である。(a) is a top view showing the engaging member, (b) is a side view seen from the bottom side of (a), (c) is a side view seen from the left side of (b), and (d) is an engagement member. It is a bottom view showing a joining member, (e) is a side view seen from the paper surface right side of (b). 吊支装置をフランジ補強具に取付ける様子を下方側から見た説明図である。It is explanatory drawing which looked at a mode that a suspension support apparatus was attached to a flange reinforcing tool from the downward side. （ａ）はフランジ補強具を接続管及び分岐首部に設置する様子を上面側から見た説明図、（ｂ）は同じく下面側から見た説明図である。(a) is an explanatory view showing how the flange reinforcing member is installed on the connecting pipe and the branch neck from above, and (b) is an explanatory view from below. 結合ボルトにより分割体を結合する様子を示す説明図である。FIG. 10 is an explanatory diagram showing how the split bodies are joined together by the joining bolts; 結合ボルトにより分割体を結合する手順を示す説明図である。FIG. 10 is an explanatory diagram showing a procedure for joining split bodies with a joining bolt; 連結ボルトを上方から緊締する様子を示す説明図である。FIG. 5 is an explanatory view showing how the connecting bolt is tightened from above; 吊支装置をフランジ補強具から取外す様子を上方から見た説明図である。It is the explanatory view which looked at a mode that a suspending device was removed from a flange reinforcing tool from the upper part. フランジ補強具の変形例１を示す説明図である。It is explanatory drawing which shows the modified example 1 of a flange reinforcing tool. （ａ）、（ｂ）はフランジ補強具の変形例２を示す説明図である。(a), (b) is explanatory drawing which shows the modification 2 of a flange reinforcing tool. （ａ）、（ｂ）はフランジ補強具の変形例３を示す説明図である。(a), (b) is explanatory drawing which shows the modified example 3 of a flange reinforcing tool. （ａ）、（ｂ）はフランジ補強具の変形例４を示す説明図である。(a), (b) is explanatory drawing which shows the modified example 4 of a flange reinforcing tool. （ａ）、（ｂ）はフランジ補強具の変形例５を示す説明図である。(a), (b) is explanatory drawing which shows the modification 5 of a flange reinforcing tool. （ａ）、（ｂ）はフランジ補強具の変形例６を示す説明図である。(a), (b) is explanatory drawing which shows the modification 6 of a flange reinforcing tool.

本発明に係るフランジ補強具を実施するための形態を実施例に基づいて以下に説明する。 A mode for carrying out the flange reinforcing tool according to the present invention will be described below based on an embodiment.

実施例に係るフランジ補強具につき、図１から図１２を参照して説明する。図１（ｂ）に示されるように、下方の管路構成部材としての流体管３の分岐首部３ｂに設けられた分岐部フランジ３ｃには、接続部材としての補修弁４のフランジ４ｃが接続され、補修弁４のフランジ４ｄには上方の管路構成部材としての接続管５のフランジ５ａが接続され、上下方向に延設されている。この実施例で、図１（ｂ）に示されるように、補修弁４は、上下に分割され、ボルトなどで連結されているタイプとなるが、補修弁のタイプはこれに限られない。図１（ａ）に示されるように、本発明に係るフランジ補強具１０は、流体管３の分岐部フランジ３ｃと接続管５のフランジ５ａとにかけて結合され、補強するものであるから、上記の補修弁４の分割部も補強できるものであることは言うまでもない。また、接続管５の上方のフランジ５ｂには消火栓２のフランジ２ｄが接続される。 A flange reinforcing tool according to an embodiment will be described with reference to FIGS. 1 to 12. FIG. As shown in FIG. 1(b), a flange 4c of a repair valve 4 as a connection member is connected to a branch flange 3c provided at a branch neck 3b of a fluid pipe 3 as a lower conduit component. The flange 4d of the repair valve 4 is connected to the flange 5a of the connection pipe 5 as an upper conduit component, and extends vertically. In this embodiment, as shown in FIG. 1(b), the repair valve 4 is divided into upper and lower parts and connected by bolts or the like, but the type of repair valve is not limited to this. As shown in FIG. 1(a), the flange reinforcing member 10 according to the present invention is connected to and reinforces the branch flange 3c of the fluid pipe 3 and the flange 5a of the connecting pipe 5. Needless to say, the divided portion of the repair valve 4 can also be reinforced. A flange 2 d of the fire hydrant 2 is connected to the upper flange 5 b of the connecting pipe 5 .

ここで、流体管３は、既設流体管あるいは新設流体管であってもよく、地中に埋設されるダクタイル鋳鉄製であり、断面視略円形状に形成され、内周面がモルタル層で被覆されている。尚、本発明に係る流体管は、その他鋳鉄、鋼等の金属製、あるいはコンクリート製、塩化ビニール、ポリエチレン若しくはポリオレフィン製等であってもよい。更に尚、流体管の内周面はモルタル層に限らず、例えばエポキシ樹脂等により被覆されてもよく、若しくは適宜の材料を粉体塗装により流体管の内周面に被覆してもよい。また、本実施例では流体管内の流体は上水であるが、本実施例の上水に限らず、例えば工業用水や農業用水、下水等の他、ガスやガスと液体との気液混合体であっても構わない。 Here, the fluid pipe 3 may be an existing fluid pipe or a new fluid pipe, is made of ductile cast iron buried in the ground, is formed in a substantially circular shape in cross section, and has an inner peripheral surface covered with a mortar layer. It is In addition, the fluid pipe according to the present invention may be made of metal such as cast iron or steel, concrete, vinyl chloride, polyethylene or polyolefin. Furthermore, the inner peripheral surface of the fluid pipe is not limited to the mortar layer, but may be coated with, for example, an epoxy resin or the like, or the inner peripheral surface of the fluid pipe may be coated with an appropriate material by powder coating. In this embodiment, the fluid in the fluid pipe is tap water, but it is not limited to tap water in this embodiment. It doesn't matter if it is.

図１（ａ）及び図２に示されるように、フランジ補強具１０は、接続管５のフランジ５ａの上面に係止される上側の第１狭持部材１１と、流体管３の分岐部フランジ３ｃの下面に係止される下側の第２狭持部材１４と、第１狭持部材１１と第２狭持部材１４を連結する連結ボルト１７ａ及び雌ネジ部１７ｃを備えたナット１７ｂと、後述する分割体１２，１２’を一体に結合して環状の第１狭持部材１１を構成し、及び分割体１５，１５’を一体に結合して環状の第２狭持部材１４を構成する結合部材１８と、から主に構成される。 As shown in FIGS. 1(a) and 2, the flange reinforcing member 10 includes an upper first holding member 11 engaged with the upper surface of the flange 5a of the connecting pipe 5, and a branch flange of the fluid pipe 3. a second holding member 14 on the lower side that is locked to the lower surface of the plate 3c; Divided bodies 12 and 12', which will be described later, are integrally connected to form a first annular holding member 11, and divided bodies 15 and 15' are integrally connected to form a second annular holding member 14. and a connecting member 18.

次いで、図２及び図３に基づいて第１狭持部材１１について説明する。図２に示されるように、第１狭持部材１１は、周方向に分割された分割体１２，１２’からなり、該分割体１２，１２’は結合部材１８により結合されることで、環状一体に構成される。この結合部材１８は、ボルト１８ａ（結合ボルト）及び、雌ネジからなる螺合部１８ｃを備えたナット１８ｂから構成されている。尚、本実施例においては、第１狭持部材１１を２分割した実施例を示したが、これに限らず３分割以上に分割してもよい。また、分割体１２，１２’は、同一構成となっているため、分割体１２についてのみ以下に説明する。 Next, the first holding member 11 will be described with reference to FIGS. 2 and 3. FIG. As shown in FIG. 2, the first holding member 11 is composed of divided bodies 12 and 12' divided in the circumferential direction, and the divided bodies 12 and 12' are connected by a connecting member 18 to form an annular shape. configured as one. The coupling member 18 is composed of a bolt 18a (coupling bolt) and a nut 18b having a threaded portion 18c formed of a female screw. In this embodiment, an embodiment in which the first holding member 11 is divided into two is shown, but it is not limited to this, and may be divided into three or more divisions. Also, since the divided bodies 12 and 12' have the same configuration, only the divided body 12 will be described below.

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

狭持部１２ａ，１２ａ’は、それぞれ、該狭持部１２ａ，１２ａ’の基部の上端縁から径方向内側に突出する２つの突状部１２ｅ，１２ｅから構成されている。また、狭持鍔部１２ｃ，１２ｃ’は、狭持部１２ａ，１２ａ’の基部から外径側に突出しており、上下方向に貫通する貫通孔部１２ｆがそれぞれ形成されている。この貫通孔部１２ｆは、連結ボルト１７ａの頭部が周縁に係止され、且つ該連結ボルト１７ａの軸部が挿通可能な挿通部として機能している。また、一方の狭持部１２ａの基部における外径側下端には、外径側及び下方に開口する切欠き部１２ｊが形成されており、切欠き部１２ｊは貫通孔部１２ｆに連通している。ここで連結ボルト１７ａの軸部とは、ねじ形成されている部分とねじ形成されていない部分とを含む。 Each of the holding portions 12a and 12a' is composed of two projecting portions 12e and 12e projecting radially inward from the upper edges of the base portions of the holding portions 12a and 12a'. The holding collar portions 12c and 12c' protrude radially outward from the base portions of the holding portions 12a and 12a', and are formed with through-hole portions 12f penetrating therethrough in the vertical direction. The through-hole portion 12f functions as an insertion portion through which the head portion of the connecting bolt 17a is engaged with the peripheral edge and through which the shaft portion of the connecting bolt 17a can be inserted. A notch portion 12j that opens outward and downward is formed at the outer diameter side lower end of the base portion of one holding portion 12a, and the notch portion 12j communicates with the through hole portion 12f. . Here, the shaft portion of the connecting bolt 17a includes a threaded portion and a non-threaded portion.

また、連結アーム部１２ｂは、一方の狭持部１２ａの基部の下端部と、他方の狭持部１２ａ’の基部の下端部とを連結するように略円弧状に形成されている。また、アーム部１２ｄは、一方の狭持部１２ａの基部の上端部から略水平方向に、連結アーム部１２ｂと同心だが異径の略円弧状に形成されており、かつ、外径側の面が直線状になるように形成されている。なお、アーム部１２ｄは、同心且つ同径の略円弧状に形成されていてもよい。また、アーム部１２ｄの端部には、アーム部１２ｄの下端部から周方向に突出する結合部１２ｇ（下方の接合部）が形成されており、結合部１２ｇには、上下方向に貫通する貫通孔１２ｈが形成されている。尚、アーム部１２ｄ、結合部１２ｇ及び後述する結合部１２ｐの外径側は、前述したように接続管５のフランジ５ａに取付けられたときに、補修弁４のハンドル等、接続部材の一部に接触しないように、該補修弁４のハンドルの操作方向に沿って切り欠かれている（図８（ａ）参照）。 The connecting arm portion 12b is formed in a substantially arc shape so as to connect the lower end of the base of one of the holding portions 12a and the lower end of the base of the other holding portion 12a'. The arm portion 12d is formed substantially horizontally from the upper end of the base portion of one of the holding portions 12a in a substantially circular arc concentric with the connecting arm portion 12b but with a different diameter. are formed in a straight line. In addition, the arm portion 12d may be formed in a substantially circular arc shape concentrically and with the same diameter. In addition, a connecting portion 12g (lower connecting portion) that protrudes in the circumferential direction from the lower end of the arm portion 12d is formed at the end of the arm portion 12d. A hole 12h is formed. The outer diameter side of the arm portion 12d, the joint portion 12g, and the joint portion 12p, which will be described later, is part of the connection member such as the handle of the repair valve 4 when attached to the flange 5a of the connection pipe 5 as described above. The repair valve 4 is notched along the operating direction of the handle so as not to come into contact with the (see FIG. 8(a)).

また、結合部１２ｇには、下方に開口する収容部としての凹部１２ｋが形成されており、凹部１２ｋの略中心に貫通孔１２ｈが形成されており、該凹部１２ｋ内には略六角形状のナット１８ｂが配置されている。この凹部１２ｋは、下面視略六角形状、すなわち、ナット１８ｂの外形と略同一形状の内形を成している。また、ナット１８ｂは、凹部１２ｋの内壁に図示しない接着剤などで固定され、凹部１２ｋから落下しないようになっている。すなわち、凹部１２ｋの内壁は、ナット１８ｂの回動規制手段として機能し、また前記接着剤は、ナット１８ｂの落下防止手段として機能している。尚、ナット１８ｂ及び凹部１２ｋは、下面視略六角形状を成す形態を例示したが、下面視略楕円形、六角形以外の多角形等自由に変更してもよく、このような非円形に形成することで、凹部１２ｋの内壁が回動規制手段として機能する。 In addition, a recess 12k is formed in the connecting portion 12g as a housing portion that opens downward, and a through hole 12h is formed substantially in the center of the recess 12k. 18b are arranged. The recess 12k has a substantially hexagonal shape when viewed from the bottom, that is, has an inner shape that is substantially the same as the outer shape of the nut 18b. Also, the nut 18b is fixed to the inner wall of the recess 12k with an adhesive (not shown) or the like so as not to drop from the recess 12k. That is, the inner wall of the concave portion 12k functions as rotation restricting means for the nut 18b, and the adhesive functions as fall prevention means for the nut 18b. Although the nut 18b and the recessed portion 12k have been exemplified as having a substantially hexagonal shape when viewed from the bottom, they may be substantially elliptical when viewed from the bottom, polygonal shapes other than hexagons, or the like. By doing so, the inner wall of the concave portion 12k functions as a rotation restricting means.

また、他方の狭持部１２ａ’の基部の端部には、他方の狭持部１２ａ’の基部の上端部から周方向に突出する結合部１２ｐ（上方の接合部）が形成されており、結合部１２ｐには、上下方向に貫通する挿通孔としての貫通孔１２ｑが形成されている。すなわち、結合部１２ｐは、狭持鍔部１２ｃ’の近傍に設けられている。 In addition, at the end of the base of the other holding portion 12a', a coupling portion 12p (upper joining portion) is formed that protrudes in the circumferential direction from the upper end of the base of the other holding portion 12a'. A through hole 12q is formed in the connecting portion 12p as an insertion hole penetrating in the vertical direction. In other words, the connecting portion 12p is provided in the vicinity of the holding collar portion 12c'.

特に図２に示されるように、これら分割体１２，１２’を結合する際には、分割体１２の結合部１２ｇと分割体１２’の結合部１２ｐとを上下に重ねた状態で、貫通孔１２ｈ，１２ｑの上方からボルト１８ａを挿入し凹部１２ｋ内のナット１８ｂの内周面に形成された雌ネジからなる螺合部１８ｃに緊締する。他方も同様に、分割体１２の結合部１２ｐと分割体１２’の結合部１２ｇとを上下に重ねた状態で、貫通孔１２ｈ，１２ｑの上方からボルト１８ａを挿入し上方から凹部１２ｋ内のナット１８ｂの螺合部１８ｃに緊締する。このとき、分割体１２の結合部１２ｐは分割体１２’の結合部１２ｇよりも上方に位置しており、分割体１２’の結合部１２ｐは分割体１２の結合部１２ｇよりも上方に位置している。 Particularly, as shown in FIG. 2, when joining the split bodies 12 and 12', the joining portion 12g of the split body 12 and the joining portion 12p of the split body 12' are vertically overlapped, and the through hole A bolt 18a is inserted from above 12h and 12q and tightened to a threaded portion 18c formed of a female screw formed on the inner peripheral surface of a nut 18b in the recess 12k. On the other side, similarly, with the connecting portion 12p of the divided body 12 and the connecting portion 12g of the divided body 12' being vertically overlapped, the bolt 18a is inserted from above the through holes 12h and 12q, and the nut in the recess 12k is inserted from above. Tighten to the threaded portion 18c of 18b. At this time, the joint portion 12p of the divided body 12 is positioned above the joint portion 12g of the divided body 12', and the joint portion 12p of the divided body 12' is positioned above the joint portion 12g of the divided body 12. ing.

これら分割体１２，１２’が結合されることにより、上方から見て環状を成す第１狭持部材１１が構成される。尚、分割体１２，１２’の各狭持部１２ａ，１２ａ’の基部、各連結アーム部１２ｂ及び各アーム部１２ｄは、第１狭持部材１１を環状に構成する本体部であり、分割体１２，１２’の各結合部１２ｇ，１２ｐは、周方向に延びる前記本体部の延長線上に設けられている。 By connecting these divided bodies 12 and 12', the first holding member 11 having an annular shape when viewed from above is constructed. The bases of the holding portions 12a and 12a' of the divided bodies 12 and 12', the connecting arm portions 12b, and the arm portions 12d are the main body portion forming the first holding member 11 in an annular shape. The coupling portions 12g, 12p of 12, 12' are provided on extension lines of the body portion extending in the circumferential direction.

次いで、図２及び図４に基づいて第２狭持部材１４について説明する。図２に示されるように、第２狭持部材１４は、周方向に分割された分割体１５，１５’からなり、該分割体１５，１５’は結合部材１８（図２参照）により結合されることで、環状一体に構成される。尚、本実施例においては、第２狭持部材１４を２分割した実施例を示したが、これに限らず３分割以上に分割してもよい。 Next, the second holding member 14 will be described with reference to FIGS. 2 and 4. FIG. As shown in FIG. 2, the second holding member 14 is composed of divided bodies 15, 15' divided in the circumferential direction, and the divided bodies 15, 15' are connected by a connecting member 18 (see FIG. 2). By doing so, it is configured as an integral ring. In this embodiment, an embodiment in which the second holding member 14 is divided into two is shown, but it is not limited to this and may be divided into three or more divisions.

図４に示されるように、分割体１５は、径方向内側を向くように周方向の２箇所に形成される狭持部１５ａ，１５ａ’と、該狭持部１５ａ，１５ａ’に対応する周方向位置で径方向外側を向くように周方向の２箇所に形成される狭持鍔部１５ｃ，１５ｃ’と、一方の狭持部１５ａの基部と他方の狭持部１５ａ’の基部とを連結する連結アーム部１５ｂと、一方の狭持部１５ａの基部から他方の狭持部１５ａ’とは反対方向に延びるアーム部１５ｄと、を備えている。尚、分割体１５には、狭持部１５ａ及び狭持鍔部１５ｃが１つまたは３つ以上の複数ずつ設けられていてもよい。 As shown in FIG. 4, the divided body 15 includes holding portions 15a and 15a' formed at two locations in the circumferential direction so as to face radially inward, and peripheral portions corresponding to the holding portions 15a and 15a'. The holding collar portions 15c and 15c' formed at two locations in the circumferential direction so as to face radially outward at the directional positions, and the base portion of one holding portion 15a and the base portion of the other holding portion 15a' are connected. and an arm portion 15d extending from the base of one holding portion 15a in the direction opposite to the other holding portion 15a'. Incidentally, the divided body 15 may be provided with one holding portion 15a and a plurality of holding flange portions 15c each of which is three or more.

狭持部１５ａ，１５ａ’は、該狭持部１５ａ，１５ａ’の基部の下端縁から径方向内側に突出する２つの突状部１５ｅ，１５ｅから構成されている。また、狭持鍔部１５ｃ，１５ｃ’は、狭持部１５ａ，１５ａ’の基部から外径側に突出しており、上下方向に貫通する貫通孔部１５ｆがそれぞれ形成されている。この貫通孔部１５ｆは、連結ボルト１７ａの軸部が挿通可能となっている。また、狭持鍔部１５ｃ，１５ｃ’には、下方に開口する収容部としての凹部１５ｊがそれぞれ形成されており、各凹部１５ｊの略中心に貫通孔１５ｆが形成されており、該各凹部１５ｊ内にはナット１７ｂが配置されている。この凹部１５ｊは、下面視略六角形状、すなわち、ナット１７ｂの外形と略同一形状の内形を成している。また、ナット１７ｂは、凹部１５ｊの内壁に図示しない接着剤などで固定され、凹部１５ｊから落下しないようになっている。すなわち、凹部１５ｊの内壁は、ナット１７ｂの回動規制手段として機能し、また前記接着剤は、ナット１７ｂの落下防止手段として機能している。尚、ナット１７ｂ及び凹部１５ｊは、下面視略六角形状を成す形態を例示したが、下面視略楕円形、六角形以外の多角形等自由に変更してもよく、このような非円形に形成することで、凹部１５ｊの内壁が回動規制手段として機能する。 The holding portions 15a and 15a' are composed of two projecting portions 15e and 15e projecting radially inward from the lower edges of the base portions of the holding portions 15a and 15a'. The holding collar portions 15c and 15c' protrude radially outward from the base portions of the holding portions 15a and 15a', and are formed with through holes 15f that penetrate vertically. The shaft portion of the connecting bolt 17a can be inserted through the through hole portion 15f. In addition, recessed portions 15j as accommodating portions that open downward are formed in the holding flange portions 15c and 15c', respectively. A nut 17b is arranged inside. The recess 15j has a substantially hexagonal shape when viewed from the bottom, that is, has an inner shape that is substantially the same as the outer shape of the nut 17b. Also, the nut 17b is fixed to the inner wall of the recess 15j with an adhesive (not shown) or the like so as not to drop from the recess 15j. That is, the inner wall of the concave portion 15j functions as rotation restricting means for the nut 17b, and the adhesive functions as fall prevention means for the nut 17b. Although the nut 17b and the concave portion 15j have an approximately hexagonal shape when viewed from the bottom, they may be formed into a non-circular shape such as a substantially elliptical shape when viewed from the bottom or a polygonal shape other than a hexagon. By doing so, the inner wall of the concave portion 15j functions as a rotation restricting means.

また、連結アーム部１５ｂは、一方の狭持部１５ａの基部の上端部と、他方の狭持部１５ａ’の基部の上端部と、を連結するように略円弧状に形成されている。また、アーム部１５ｄは、一方の狭持部１５ａの基部の下端部から略水平方向に、連結アーム部１５ｂと同心だが異径の略円弧状に形成されており、かつ、外径側の面が直線状になるように形成されている。なお、アーム部１５ｄは、同心且つ同径の略円弧状に形成されていてもよい。また、アーム部１５ｄの端部には、アーム部１５ｄの上端部から周方向に突出する結合部１５ｇ（上方の接合部）が形成されており、結合部１５ｇには、上下方向に貫通する貫通孔１５ｈが形成されている。尚、アーム部１５ｄの外径側は、アーム部１２ｄの外径側とは異なり、前述したように流体管３の分岐部フランジ３ｃに取付けられたときに、補修弁４のハンドル等、接続部材の一部に接触しないように、該補修弁４のハンドルの操作方向に沿ったように形成されている（図８（ｂ）参照）。 The connecting arm portion 15b is formed in a substantially arc shape so as to connect the upper end of the base of one of the holding portions 15a and the upper end of the base of the other holding portion 15a'. The arm portion 15d is formed substantially horizontally from the lower end of the base portion of one of the holding portions 15a in a substantially circular arc concentric with the connecting arm portion 15b but having a different diameter. are formed in a straight line. In addition, the arm portion 15d may be formed in a substantially circular arc shape concentrically and with the same diameter. In addition, a joint portion 15g (upper joint portion) that protrudes in the circumferential direction from the upper end portion of the arm portion 15d is formed at the end portion of the arm portion 15d. A hole 15h is formed. In addition, unlike the outer diameter side of the arm portion 12d, the outer diameter side of the arm portion 15d is different from the outer diameter side of the arm portion 12d. It is formed along the operating direction of the handle of the repair valve 4 (see FIG. 8(b)).

また、他方の狭持部１５ａ’の基部の端部には、他方の狭持部１５ａ’の基部の下端部から周方向に突出する結合部１５ｐ（下方の接合部）が形成されており、結合部１５ｐには、上下方向に貫通する貫通孔１５ｑが形成されている。すなわち、結合部１５ｐは、狭持鍔部１５ｃ’の近傍に設けられている。また、結合部１５ｐには、下方に開口する収容部としての凹部１５ｋが形成されており、凹部１５ｋの略中心に貫通孔１５ｑが形成されており、該凹部１５ｋ内にはナット１８ｂが配置されている。この凹部１５ｋは、下面視略六角形状、すなわち、ナット１８ｂの外形と略同一形状の内形を成している。また、ナット１８ｂは、凹部１５ｋの内壁に図示しない接着剤などで固定され、凹部１５ｋから落下しないようになっている。すなわち、凹部１５ｋの内壁は、ナット１８ｂの回動規制手段として機能し、また前記接着剤は、ナット１８ｂの落下防止手段として機能している。 In addition, at the end of the base of the other holding portion 15a', a connecting portion 15p (lower joining portion) is formed that protrudes in the circumferential direction from the lower end of the base of the other holding portion 15a'. A through-hole 15q is formed in the connecting portion 15p so as to extend therethrough in the vertical direction. That is, the coupling portion 15p is provided near the holding flange portion 15c'. A recess 15k is formed in the connecting portion 15p as a housing portion that opens downward. A through hole 15q is formed substantially in the center of the recess 15k, and a nut 18b is arranged in the recess 15k. ing. The recess 15k has a substantially hexagonal shape when viewed from the bottom, that is, has an inner shape that is substantially the same as the outer shape of the nut 18b. Also, the nut 18b is fixed to the inner wall of the recess 15k with an adhesive (not shown) or the like so as not to drop from the recess 15k. That is, the inner wall of the concave portion 15k functions as rotation restricting means for the nut 18b, and the adhesive functions as drop preventing means for the nut 18b.

図２に戻って、これら分割体１５，１５’を結合する際には、分割体１５の結合部１５ｇと分割体１５’の結合部１５ｐとを上下に重ねた状態で、貫通孔１５ｈ，１５ｑの上方からボルト１８ａを挿入し凹部１５ｋ内のナット１８ｂの内周面に形成された螺合部１８ｃに緊締する。他方も同様に、分割体１５の結合部１５ｐと分割体１５’の結合部１５ｇとを上下に重ねた状態で、貫通孔１５ｈ，１５ｑの上方からボルト１８ａを挿入し上方から凹部１５ｋ内のナット１８ｂの螺合部１８ｃに緊締する。このとき、分割体１５の結合部１５ｐは分割体１５’の結合部１５ｇよりも下方に位置しており、分割体１５’の結合部１５ｐは分割体１５の結合部１５ｇよりも下方に位置している。 Returning to FIG. 2, when joining the split bodies 15 and 15', the joining portion 15g of the split body 15 and the joining portion 15p of the split body 15' are vertically overlapped, and then the through holes 15h and 15q are opened. The bolt 18a is inserted from above and tightened to the threaded portion 18c formed on the inner peripheral surface of the nut 18b in the recess 15k. On the other side, similarly, with the connecting portion 15p of the divided body 15 and the connecting portion 15g of the divided body 15' being vertically overlapped, the bolt 18a is inserted from above the through holes 15h and 15q, and the nut in the recess 15k is inserted from above. Tighten to the threaded portion 18c of 18b. At this time, the connecting portion 15p of the divided body 15 is positioned below the connecting portion 15g of the divided body 15', and the connecting portion 15p of the divided body 15' is positioned below the connecting portion 15g of the divided body 15. ing.

これら分割体１５，１５’が結合されることにより、上方から見て環状を成す第２狭持部材１４が構成される。尚、分割体１５，１５’の各狭持部１５ａ，１５ａ’の基部、各連結アーム部１５ｂ及び各アーム部１５ｄは、第２狭持部材１４を環状に構成する本体部であり、分割体１５，１５’の各結合部１５ｇ，１５ｐは、周方向に延びる前記本体部の延長線上に設けられている。これら第１狭持部材１１及び第２狭持部材１４は、組立状態の上面視で、補修弁４のハンドルの操作方向に沿って切り欠かれているか、ハンドルの操作方向に沿ったように形成されているか等で、互いに異なる形状をしているが、これに限らず同形状としてもよい。 By connecting these divided bodies 15 and 15', the second holding member 14 having an annular shape when viewed from above is constructed. The bases of the holding portions 15a and 15a', the connecting arm portions 15b, and the arm portions 15d of the divided bodies 15 and 15' are main bodies that form the second holding member 14 in an annular shape. The coupling portions 15g and 15p of 15 and 15' are provided on extension lines of the body portion extending in the circumferential direction. The first holding member 11 and the second holding member 14 are notched along the operating direction of the handle of the repair valve 4 or formed along the operating direction of the handle when viewed from above in the assembled state. Although they have different shapes depending on whether they are attached or not, they are not limited to this and may have the same shape.

次に、フランジ補強具１０を使用してフランジ接合を補強する手順について説明する。尚、本実施例では、流体管３の分岐首部３ｂ、補修弁４、接続管５、消火栓２を囲繞する平面視略円形状の比較的狭隘な弁筐２０内でフランジ補強具１０を取付ける形態を例示する。なお、弁筐の形状は必ずしも平面視略円形状に限られず、例えば平面視略長方形、楕円形、小判形等であっても構わない。 Next, a procedure for reinforcing the flange joint using the flange reinforcing tool 10 will be described. In this embodiment, the flange reinforcing member 10 is attached in a relatively narrow valve housing 20 having a substantially circular shape in a plan view and surrounding the branch neck portion 3b of the fluid pipe 3, the repair valve 4, the connecting pipe 5, and the fire hydrant 2. is exemplified. The shape of the valve housing is not necessarily limited to a generally circular shape in plan view, and may be, for example, generally rectangular, elliptical, or oval in plan view.

先ず、図５に示されるように、弁筐２０の上方を被覆するように載置された図示しない蓋体を取外し、開放された弁筐２０の上端の開口からフランジ補強具１０を挿入して流体管３の分岐部フランジ３ｃと接続管５のフランジ５ａとに取付ける。具体的には、弁筐２０の外方において、第１狭持部材１１及び第２狭持部材１４を分岐部フランジ３ｃ及びフランジ５ａの間隔よりも大きな間隔で対向させ、連結ボルト１７ａ及びナット１７ｂによって仮組みする。このとき、第１狭持部材１１及び第２狭持部材１４は、各結合部材１８の位置が上下方向に重畳するように配置されており、一方のボルト１８ａは緩めた状態でナット１８ｂに螺合され、他方のボルト１８ａはナット１８ｂから取外されている。これにより、第１狭持部材１１の分割体１２，１２’及び第２狭持部材１４の分割体１５，１５’が上下に対応する結合部材１８，１８を支点として一体的に回動するようになるため、分割体１２，１２’及び分割体１５，１５’を開いた状態で流体管３の分岐部フランジ３ｃと接続管５のフランジ５ａとの外径側に配置することができる（図５、図７、図８参照）。 First, as shown in FIG. 5, a lid (not shown) placed so as to cover the top of the valve housing 20 is removed, and the flange reinforcing member 10 is inserted through the opening at the upper end of the opened valve housing 20. It is attached to the branch flange 3c of the fluid pipe 3 and the flange 5a of the connecting pipe 5. As shown in FIG. Specifically, on the outside of the valve housing 20, the first holding member 11 and the second holding member 14 are opposed to each other with an interval larger than the interval between the branch flange 3c and the flange 5a, and the connecting bolt 17a and the nut 17b are connected. Temporarily assembled by At this time, the first holding member 11 and the second holding member 14 are arranged such that the positions of the connecting members 18 overlap in the vertical direction, and one bolt 18a is screwed into the nut 18b in a loosened state. and the other bolt 18a is removed from the nut 18b. As a result, the divided bodies 12, 12' of the first holding member 11 and the divided bodies 15, 15' of the second holding member 14 rotate integrally about the connecting members 18, 18 corresponding to the upper and lower sides. Therefore, the divided bodies 12, 12' and the divided bodies 15, 15' can be arranged on the outer diameter side of the branch flange 3c of the fluid pipe 3 and the flange 5a of the connection pipe 5 in an open state (Fig. 5, Figures 7 and 8).

このように仮組みされたフランジ補強具１０は、上下方向に長尺に構成された吊支装置１９，１９により流体管３の分岐部フランジ３ｃ及び接続管５のフランジ５ａの位置まで吊り下げられた状態で移動する。吊支装置１９は、長尺ボルト１９ａと、長尺ボルト１９ａの下端に取付けられる係合部材１９ｂと、から主に構成されている。係合部材１９ｂは、長尺ボルト１９ａに螺合される２つナット１９ｃ，１９ｃにより上下に狭持されることで長尺ボルト１９ａに取付けられている。尚、係合部材１９ｂは、長尺ボルト１９ａに溶接などで一体的に固定されていてもよい。また、吊支装置１９は、金属やプラスチックなどで一体的に形成されてもよい。更に、長尺ボルト１９ａは、ボルトに限らず軸状の長尺杆であってもよい。 The temporarily assembled flange reinforcing member 10 is suspended to the position of the branch flange 3c of the fluid pipe 3 and the flange 5a of the connecting pipe 5 by the suspension devices 19, 19 elongated in the vertical direction. move in the same state. The suspension device 19 is mainly composed of a long bolt 19a and an engaging member 19b attached to the lower end of the long bolt 19a. The engaging member 19b is attached to the long bolt 19a by being held vertically by two nuts 19c, 19c screwed onto the long bolt 19a. The engaging member 19b may be integrally fixed to the long bolt 19a by welding or the like. Moreover, the suspension device 19 may be integrally formed of metal, plastic, or the like. Further, the elongated bolt 19a is not limited to a bolt, and may be an elongated shaft-shaped rod.

図６に示されるように、係合部材１９ｂは、合成樹脂により構成されており、一方側に上面視略Ｃ字状に開口した係合部１９ｇを有する基部１９ｆと、基部１９ｆの上下方向略中央部から係合部１９ｇとは反対側に突出するリング部１９ｈと、を主に備えている。係合部１９ｇは、基部１９ｆから一方側に延びる円弧状のアーム部１９ｄ，１９ｄにより上面視略Ｃ字状に構成されており、アーム部１９ｄ，１９ｄ及び基部１９ｆの下端部に亘って略水平に外径方向に延びる爪部１９ｅ，１９ｅが形成されている。 As shown in FIG. 6, the engaging member 19b is made of synthetic resin, and has a base portion 19f having an engaging portion 19g that opens in a substantially C shape when viewed from the top on one side, and a base portion 19f that is substantially vertically aligned. A ring portion 19h protruding from the central portion to the side opposite to the engaging portion 19g is mainly provided. The engaging portion 19g is formed in a substantially C shape when viewed from above by arc-shaped arm portions 19d and 19d extending from a base portion 19f to one side, and extends substantially horizontally across the lower ends of the arm portions 19d and 19d and the base portion 19f. Claw portions 19e, 19e extending in the outer diameter direction are formed on the outer circumference.

図５及び図７に示されるように、吊支装置１９は、第１狭持部材１１の分割体１２，１２’における切欠き部１２ｊに対して係合部１９ｇを外径側から圧入することにより第１狭持部材１１に対して取り外し可能に固定される。係合部１９ｇを切欠き部１２ｊに圧入すると、アーム部１９ｄ，１９ｄが弾性変形し、連結ボルト１７ａの軸部の外周面に係合部１９ｇが外嵌され、アーム部１９ｄ，１９ｄは連結ボルト１７ａの軸部と切欠き部１２ｊの内壁との間で狭持される。また、吊支装置１９が第１狭持部材１１に取り外し可能に固定された状態にあっては、第１狭持部材１１が爪部１９ｅ，１９ｅの上面に載置される。このように、吊支装置１９，１９、第１狭持部材１１、連結ボルト１７ａ，１７ａが一体的に固定されるため、フランジ補強具１０を流体管３の分岐部フランジ３ｃ及び接続管５のフランジ５ａに取付ける作業を行いやすい。 As shown in FIGS. 5 and 7, the suspending device 19 press-fits the engaging portion 19g into the notch portion 12j of the divided bodies 12, 12' of the first holding member 11 from the outer diameter side. is detachably fixed to the first holding member 11 by . When the engaging portion 19g is press-fitted into the notch portion 12j, the arm portions 19d and 19d are elastically deformed, the engaging portion 19g is fitted onto the outer peripheral surface of the shaft portion of the connecting bolt 17a, and the arm portions 19d and 19d are connected to the connecting bolt. It is sandwiched between the shaft portion of 17a and the inner wall of the notch portion 12j. Further, when the suspension device 19 is detachably fixed to the first holding member 11, the first holding member 11 is placed on the upper surfaces of the claw portions 19e, 19e. Since the suspending devices 19, 19, the first holding member 11, and the connecting bolts 17a, 17a are integrally fixed in this way, the flange reinforcing member 10 is attached to the branch flange 3c of the fluid pipe 3 and the connecting pipe 5. It is easy to perform the work of attaching to the flange 5a.

図８に示されるように、仮組みしたフランジ補強具１０の分割体１２，１２’及び分割体１５，１５’を開いた状態で流体管３の分岐部フランジ３ｃと接続管５のフランジ５ａとの外径側に配置した後、吊支装置１９，１９を操作して分割体１２，１２’及び分割体１５，１５’を閉じ、分割体１２，１５の結合部１２ｐ，１５ｐと分割体１２’，１５’の結合部１２ｇ，１５ｇとを上下に重ねる。 As shown in FIG. 8, when the divided bodies 12, 12' and divided bodies 15, 15' of the temporarily assembled flange reinforcing member 10 are opened, the branch flange 3c of the fluid pipe 3 and the flange 5a of the connecting pipe 5 are separated. , the suspension devices 19, 19 are operated to close the divided bodies 12, 12' and the divided bodies 15, 15', and the joint portions 12p, 15p of the divided bodies 12, 15 and the divided body 12 The connecting portions 12g and 15g of ', 15' are stacked vertically.

次いで、図９及び図１０に示されるように、上下に重畳した分割体１２，１５の結合部１２ｐ，１５ｐと分割体１２’，１５’の結合部１２ｇ，１５ｇとに、上方からボルト１８ａを治具３１，３２により挿入し、ナット１８ｂの螺合部１８ｃに螺合させるとともに、緩めた状態のボルト１８ａを本締めして、第１狭持部材１１及び第２狭持部材１４を流体管３の分岐部フランジ３ｃ及び接続管５のフランジ５ａに取付ける。このときには、第１狭持部材１１の狭持部１２ａ，１２ａ’が接続管５のフランジ５ａの上面に載置され、分割体１２，１２’及び分割体１５，１５’を接続管５のフランジ５ａに預けた状態で、ボルト１８ａ及びナット１８ｂの緊締作業を行うことができる。尚、第１狭持部材１１の狭持部１２ａ，１２ａ’が接続管５のフランジ５ａの上面に載置された状態にあっては、連結ボルト１７ａの頭部が第１狭持部材１１の貫通孔部１２ｆの上方側周縁に係止されており、連結ボルト１７ａにより第２狭持部材１４が吊支されるようになっている。 Next, as shown in FIGS. 9 and 10, bolts 18a are attached from above to the connecting portions 12p, 15p of the divided bodies 12, 15 and the connecting portions 12g, 15g of the divided bodies 12', 15'. The first holding member 11 and the second holding member 14 are inserted by means of the jigs 31 and 32 and screwed into the threaded portion 18c of the nut 18b. 3 and the flange 5a of the connecting pipe 5. At this time, the holding portions 12a and 12a' of the first holding member 11 are placed on the upper surface of the flange 5a of the connecting pipe 5, and the divided bodies 12 and 12' and the divided bodies 15 and 15' are placed on the flange of the connecting pipe 5. The tightening operation of the bolt 18a and the nut 18b can be performed in a state of being deposited in the 5a. When the holding portions 12a and 12a' of the first holding member 11 are placed on the upper surface of the flange 5a of the connection pipe 5, the head portion of the connecting bolt 17a does not touch the first holding member 11. The second holding member 14 is suspended and supported by the connecting bolt 17a, which is engaged with the upper peripheral edge of the through hole portion 12f.

第１狭持部材１１の分割体１２，１２’を結合する治具３１には、その下端にナットグリップソケット３１ａが固定されており、ボルト１８ａを保持及び回動操作できるようになっている。また、第２狭持部材１４の分割体１５，１５’を結合する治具３２には、その下端にユニバーサルジョイント３２ｂを介してナットグリップソケット３２ａが固定されており、ボルト１８ａを保持及び斜め方向から回動操作できるようになっている。 A nut grip socket 31a is fixed to the lower end of a jig 31 for connecting the divided bodies 12, 12' of the first holding member 11, so that the bolt 18a can be held and rotated. In addition, a nut grip socket 32a is fixed to the lower end of the jig 32 that joins the divided bodies 15 and 15' of the second holding member 14 via a universal joint 32b to hold and obliquely hold the bolt 18a. Rotating operation can be performed from

具体的には、下方の第２狭持部材１４のボルト１８ａを緊締操作する際には、上方の第１狭持部材１１を避けて斜め上方向から治具３２を挿入して操作する必要があるため、弁筐２０内において治具３２を十分に傾けることができる位置まで仮組みされたフランジ補強具１０を上面視時計回りに回動させる（特に図１０（ａ）参照）。次いで、第１狭持部材１１及び第２狭持部材１４のボルト１８ａを緊締する。このように、第２狭持部材１４のボルト１８ａを緊締する際には、上方の第１狭持部材１１を避けて斜め方向から治具３２を挿入操作できるので、ボルト１８ａの緊締作業を行いやすい。尚、本実施例では、仮組みされたフランジ補強具１０を上面視時計回りに回動させる形態を例示したが、上面視反時計回りに回動させてもよい。また、第１狭持部材１１及び第２狭持部材１４のボルト１８ａの緊締作業が完了すると、フランジ補強具１０を適正な位置に回動させる（特に図１０（ｂ）参照）。 Specifically, when tightening the bolt 18a of the lower second holding member 14, it is necessary to avoid the upper first holding member 11 and insert the jig 32 obliquely upward. Therefore, the temporarily assembled flange reinforcing member 10 is rotated clockwise to a position where the jig 32 can be sufficiently tilted in the valve housing 20 (especially see FIG. 10(a)). Next, the bolts 18a of the first holding member 11 and the second holding member 14 are tightened. Thus, when tightening the bolt 18a of the second holding member 14, the jig 32 can be inserted obliquely while avoiding the upper first holding member 11, so that the bolt 18a can be tightened. Cheap. In this embodiment, the provisionally assembled flange reinforcing member 10 is rotated clockwise when viewed from the top, but may be rotated counterclockwise when viewed from the top. Further, when the bolts 18a of the first holding member 11 and the second holding member 14 are tightened, the flange reinforcing member 10 is rotated to an appropriate position (see FIG. 10(b) in particular).

次いで、図１１及び図１２に示されるように、吊支装置１９，１９を第１狭持部材１１の外径側に引っ張り、係合部材１９ｂを連結ボルト１７ａの軸部及び切欠き部１２ｊから取外す。このとき吊支装置１９，１９にて、フランジ補強具１０の回転を止めるようにして、最後に取外してもよい。そして、図１１に示されるように、下端にナットグリップソケット３３ａが固定された治具３３を用いて、連結ボルト１７ａの頭部を上方から操作して、該連結ボルト１７ａの軸部を第２狭持部材１４のナット１７ｂに緊締する。これにより、連結ボルト１７ａの上部に向けて螺挿されるナット１７ｂに伴い、第２狭持部材１４が上方に近づくように移動し、第１狭持部材１１及び第２狭持部材１４により、流体管３の分岐部フランジ３ｃと接続管５のフランジ５ａとが上下方向に狭持される。 Next, as shown in FIGS. 11 and 12, the suspending devices 19, 19 are pulled toward the outer diameter side of the first holding member 11, and the engaging member 19b is pulled from the shaft portion and the notch portion 12j of the connecting bolt 17a. Remove. At this time, the suspension devices 19, 19 may be used to stop the rotation of the flange reinforcing member 10, and the member may be finally removed. Then, as shown in FIG. 11, a jig 33 having a nut grip socket 33a fixed to its lower end is used to operate the head portion of the connecting bolt 17a from above, thereby moving the shaft portion of the connecting bolt 17a to the second position. The nut 17b of the holding member 14 is tightened. As a result, the second holding member 14 moves upward along with the nut 17b screwed toward the upper portion of the connecting bolt 17a. The branch flange 3c of the pipe 3 and the flange 5a of the connecting pipe 5 are held vertically.

以上説明したように、連結ボルト１７ａの軸部を上方の第１狭持部材１１の貫通孔部１２ｆに挿通させた状態で連結ボルト１７ａの頭部を上方から操作して連結ボルト１７ａの軸部を下方の第２狭持部材１４のナット１７ｂに螺合させることにより、第２狭持部材１４が第１狭持部材１１に近づくように移動し、第１狭持部材１１及び第２狭持部材１４により、流体管３の分岐部フランジ３ｃと接続管５のフランジ５ａとが上下方向に狭持されるようになっている。すなわち、上方に開口する狭隘な弁筐２０内であっても、上方からの操作によりフランジ補強具１０の取付作業を簡便に行うことができるとともに、連結ボルト１７ａの軸部が第１狭持部材１１よりも上方に大きく突出しないので、連結ボルト１７ａの軸部が補修弁４に干渉することが回避され、流体管３の分岐部フランジ３ｃと接続管５のフランジ５ａとを上下方向に十分に狭持することができる。また例えば、連結ボルト１７ａを、該ボルトや第２狭持部材１４とは別体のナットに締結する場合、第２狭持部材１４にボルト頭部若しくはナット用の回転止めを設けるか、治具により回転防止する必要がある。この際、組立時、第２狭持部材１４と連結ボルト１７ａあるいは別体のナットが、衝撃的に接触することで、表面の防錆剤や塗装がはがれ、錆を発生させる虞があるが、本構造によれば、その虞が無い。特に、弁筐下方では水没し易い環境にあるため、本構造によれば防錆処理を傷付けないという効果が際立つ。 As described above, in a state in which the shaft portion of the connecting bolt 17a is inserted through the through hole portion 12f of the upper first holding member 11, the head portion of the connecting bolt 17a is operated from above to move the shaft portion of the connecting bolt 17a. is screwed into the nut 17b of the lower second holding member 14, the second holding member 14 moves closer to the first holding member 11, and the first holding member 11 and the second holding member The branch flange 3c of the fluid pipe 3 and the flange 5a of the connection pipe 5 are held vertically by the member 14. As shown in FIG. That is, even in the narrow valve housing 20 that opens upward, the mounting work of the flange reinforcing member 10 can be easily performed by operating from above, and the shaft portion of the connecting bolt 17a is the first holding member. 11, the shaft portion of the connecting bolt 17a is prevented from interfering with the repair valve 4, and the flange 3c of the branch portion of the fluid pipe 3 and the flange 5a of the connecting pipe 5 are sufficiently vertically aligned. You can hold onto it. Further, for example, when the connecting bolt 17a is fastened to a nut separate from the bolt or the second holding member 14, the second holding member 14 may be provided with a bolt head or a rotation stopper for the nut, or a jig may be provided. It is necessary to prevent rotation by At this time, when the second holding member 14 and the connecting bolt 17a or the separate nut come into contact with impact during assembly, there is a risk that the anticorrosive agent or paint on the surface will come off and rust will occur. According to this structure, there is no fear of that. In particular, since the lower part of the valve housing is in an environment where it is likely to be submerged in water, this structure has a remarkable effect of not damaging the antirust treatment.

また、第２狭持部材１４に取付けられたナット１７ｂに連結ボルト１７ａの軸部が螺合するようになっている。これにより、第２狭持部材１４に直接ネジ加工を必要としないため、連結ボルト１７ａの軸部が螺合する雌ネジ部１７ｃを簡便に形成することができるとともに、第２狭持部材１４の腐食を防止できる。 A shaft portion of a connecting bolt 17a is screwed into a nut 17b attached to the second holding member 14. As shown in FIG. As a result, the second holding member 14 does not need to be threaded directly, so that the female threaded portion 17c into which the shaft portion of the connecting bolt 17a is screwed can be easily formed. Corrosion can be prevented.

また、ナット１７ｂは、回動規制手段と落下防止手段とにより第２狭持部材１４に対して位置決めされている。具体的には、ナット１７ｂは、第２狭持部材１４の凹部１５ｊの内壁によって回転不能に規制されるとともに、当該内壁に接着剤で固定されており、ナット１７ｂを回転不能または落下不能に押さえる必要がなく、上方から連結ボルト１７ａの軸部をナット１７ｂの雌ネジ部１７ｃに螺合させる操作のみで第１狭持部材１１及び第２狭持部材１４を簡便に連結することができる。 Also, the nut 17b is positioned with respect to the second holding member 14 by a rotation restricting means and a drop prevention means. Specifically, the nut 17b is unrotatably regulated by the inner wall of the recessed portion 15j of the second holding member 14, and is fixed to the inner wall with an adhesive to hold the nut 17b unrotatable or undroppable. The first holding member 11 and the second holding member 14 can be easily connected simply by screwing the shaft portion of the connecting bolt 17a into the female screw portion 17c of the nut 17b from above.

また、ナット１７ｂは、凹部１５ｊに収容されているので、連結ボルト１７ａとナット１７ｂとの螺合操作時に第２狭持部材１４とナット１７ｂとの接着が外れたとしても、当該ナット１７ｂは連結ボルト１７ａに螺合しているため落下の虞はなく、更に凹部１５ｊの内壁によりナット１７ｂの回動が規制され、連結ボルト１７ａとナット１７ｂとを確実に螺合することができる。 Further, since the nut 17b is accommodated in the recess 15j, even if the second holding member 14 and the nut 17b are disengaged when the connecting bolt 17a and the nut 17b are screwed together, the nut 17b remains connected. Since it is screwed onto the bolt 17a, there is no risk of it falling off. Further, the rotation of the nut 17b is restricted by the inner wall of the recess 15j, so that the connection bolt 17a and the nut 17b can be securely screwed together.

また、第１狭持部材１１を構成する分割体１２の結合部１２ｐは、隣接する分割体１２’の結合部１２ｇと上下方向に重畳し、上側の結合部１２ｐにはボルト１８ａを遊挿可能な貫通孔１２ｑが設けられ、下側の結合部１２ｇにはボルト１８ａの軸部が螺合可能なナット１８ｂが設けられている。これによれば、上方からボルト１８ａの軸部を貫通孔１２ｑに挿通させ、ナット１８ｂに螺合させることで簡便に第１狭持部材１１を構成できる。尚、第２狭持部材１４も同様の構成となっているので第２狭持部材１４を簡便に構成できる。 The connecting portion 12p of the divided body 12 constituting the first holding member 11 vertically overlaps the connecting portion 12g of the adjacent divided body 12', and the bolt 18a can be loosely inserted into the upper connecting portion 12p. A through hole 12q is provided, and a nut 18b into which the shaft of a bolt 18a can be screwed is provided on the lower coupling portion 12g. According to this, the shaft portion of the bolt 18a is inserted through the through hole 12q from above and screwed onto the nut 18b, whereby the first holding member 11 can be configured easily. In addition, since the second holding member 14 has the same configuration, the second holding member 14 can be easily configured.

また、第１狭持部材１１のボルト１８ａと、第２狭持部材１４のボルト１８ａとは、上下方向に重畳する位置に配置されている。これによれば、上下に対応するボルト１８ａ，１８ａが１箇所外された第１狭持部材１１及び第２狭持部材１４と連結ボルト１７ａとを仮組みした状態とすることで、分割体１２，１２’及び分割体１５，１５’が上下に対応する結合部材１８を中心として一体的に回動できるので、流体管３の分岐部フランジ３ｃと接続管５のフランジ５ａとに簡便に設置することができる。 Further, the bolt 18a of the first holding member 11 and the bolt 18a of the second holding member 14 are arranged at positions overlapping each other in the vertical direction. According to this, by temporarily assembling the first holding member 11 and the second holding member 14 from which one of the bolts 18a, 18a corresponding to the upper and lower sides is removed, and the connection bolt 17a, the divided body 12 can be , 12' and split bodies 15, 15' can be rotated integrally around the coupling member 18 corresponding to the upper and lower sides. be able to.

また、ナット１８ｂは、凹部１２ｋ，１５ｋ内に配置されているので、ボルト１８ａとナット１８ｂとの螺合操作時に凹部１２ｋ，１５ｋとナット１８ｂとの接着が外れたとしても、凹部１２ｋ，１５ｋの内壁によりナット１８ｂの回動が規制され、ボルト１８ａとナット１８ｂとを確実に螺合することができる。 Further, since the nut 18b is disposed within the recesses 12k and 15k, even if the recesses 12k and 15k are disengaged from the nut 18b when the bolt 18a and the nut 18b are screwed together, the recesses 12k and 15k will remain closed. Rotation of the nut 18b is restricted by the inner wall, so that the bolt 18a and the nut 18b can be securely screwed together.

尚、本実施例では、連結ボルト１７ａが螺合する雌ネジ部１７ｃがナット１７ｂの内周面に形成されている形態を例示したが、これに限られるものではなく、例えば、第２狭持部材１４に雌ネジ部を直接形成してもよい。 In this embodiment, the female threaded portion 17c into which the connecting bolt 17a is screwed is formed on the inner peripheral surface of the nut 17b. Female threads may be formed directly on member 14 .

また、本実施例では、ナット１７ｂが凹部１５ｊに収容されている形態を例示したが、例えば、第２狭持部材１４の外径側、上面側、下面側などにナット１７ｂが溶接等で第２狭持部材１４に固着されていてもよい。 In this embodiment, the nut 17b is housed in the recess 15j. 2 may be fixed to the holding member 14 .

また、本実施例では、弁筐２０の外方において、第１狭持部材１１及び第２狭持部材１４を連結ボルト１７ａ及びナット１７ｂによって仮組みした状態で一体的に流体管３の分岐部フランジ３ｃと接続管５のフランジ５ａとに設置する形態を例示したが、第１狭持部材１１及び第２狭持部材１４を流体管３の分岐部フランジ３ｃと接続管５のフランジ５ａとに取付けた後、連結ボルト１７ａ及びナット１７ｂによって第１狭持部材１１及び第２狭持部材１４を連結するようになっていてもよい。この場合、第２狭持部材１４に補修弁４のフランジ４ｃに係止可能な係止部を設け、フランジ４ｃに係止させた状態で第２狭持部材１４を構成してもよい。 In this embodiment, the first holding member 11 and the second holding member 14 are temporarily assembled by connecting bolts 17a and nuts 17b on the outside of the valve housing 20, and the branch portion of the fluid pipe 3 is integrally formed. Although the configuration in which the flange 3c and the flange 5a of the connection pipe 5 are installed is illustrated, the first holding member 11 and the second holding member 14 are installed on the branch flange 3c of the fluid pipe 3 and the flange 5a of the connection pipe 5. After mounting, the first holding member 11 and the second holding member 14 may be connected by connecting bolts 17a and nuts 17b. In this case, the second holding member 14 may be provided with a locking portion that can be locked to the flange 4c of the repair valve 4, and the second holding member 14 may be constructed in a state of being locked to the flange 4c.

次に、フランジ補強具の変形例１について説明する。図１３に示されるように、第１狭持部材１１１の分割体１２１は、貫通孔部１２１ｆが外径側に開放するように切り欠かれている。この切欠き部分の開放寸法は、連結ボルト１７ａの軸部よりも大寸であって、連結ボルト１７ａの頭部及びナット１７ｂよりも小寸である。このようにすることにより、上方に大きな作業スペースがなくても連結ボルト１７ａの軸部を外径側から挿入して貫通孔部１２１ｆ内に配置できるので、作業性が向上する。また、貫通孔１２１ｈや貫通孔１２１ｑは、ボルト１８ａの軸部が径方向に離脱不能な寸法であれば一部切り欠かれていてもよい。このようにすることで、結合部１２１ｇや挟持鍔部１２１ｃ’の領域を狭めることができる。なお、図１３では、貫通孔部１２１ｆ、貫通孔１２１ｈ及び貫通孔１２１ｑがいずれも切り欠かれているが、これに限らず、いずれかの貫通孔部若しくは貫通孔のみが切り欠かれてもよい。 Next, Modification 1 of the flange reinforcement will be described. As shown in FIG. 13, the divided body 121 of the first holding member 111 is notched so that the through-hole portion 121f opens radially outward. The open dimension of this notch portion is larger than the shaft portion of the connecting bolt 17a and smaller than the head of the connecting bolt 17a and the nut 17b. By doing so, the shaft portion of the connecting bolt 17a can be inserted from the outer diameter side and arranged in the through-hole portion 121f without a large work space above, thereby improving workability. Further, the through hole 121h and the through hole 121q may be partially notched as long as the shaft portion of the bolt 18a has a dimension that prevents the axial portion of the bolt 18a from being detached in the radial direction. By doing so, it is possible to narrow the area of the joint portion 121g and the sandwiching collar portion 121c'. In FIG. 13, the through hole portion 121f, the through hole 121h, and the through hole 121q are all cut out, but the present invention is not limited to this, and only one of the through hole portions or the through hole may be cut out. .

次に、フランジ補強具の変形例２について説明する。図１４に示されるように、第２狭持部材１４１の狭持鍔部１５１ｃには、下方に開口する収容部としての凹部１５１ｊが形成されており、凹部１５１ｊの開口側には、凹部１５１ｊの中心側に向かって略水平に延びる小さな突起１５１ｒ，１５１ｒが対向して形成されている。ナット１７ｂは、該ナット１７ｂを突起１５１ｒ，１５１ｒを弾性変形させながら凹部１５１ｊに圧入することにより凹部１５１ｊ内に配置される。凹部１５１ｊはナット１７ｂを遊嵌可能な大きさで形成されているとともに、凹部１５１ｊ内に配置されたナット１７ｂは突起１５１ｒ，１５１ｒにより係止され凹部１５１ｊからの抜け出しが規制されている。すなわち、突起１５１ｒ，１５１ｒは、本変形例２における落下防止手段を構成しており、作業者がナット１７ｂを落下不能に押さえていなくても連結ボルト１７ａとナット１７ｂとの螺合作業を行うことができる。 Next, Modified Example 2 of the flange reinforcing member will be described. As shown in FIG. 14, the holding collar portion 151c of the second holding member 141 is formed with a recess 151j as a housing portion that opens downward. Small projections 151r, 151r extending substantially horizontally toward the center are formed facing each other. The nut 17b is arranged in the recess 151j by pressing the nut 17b into the recess 151j while elastically deforming the projections 151r, 151r. The recess 151j is formed with a size that allows the nut 17b to be loosely fitted therein, and the nut 17b placed in the recess 151j is locked by projections 151r, 151r and prevented from coming out of the recess 151j. In other words, the protrusions 151r, 151r constitute the drop prevention means in the second modification, and the screwing operation of the connecting bolt 17a and the nut 17b can be performed even if the operator does not hold the nut 17b so that it cannot be dropped. can be done.

また、ナット１７ｂは凹部１５１ｊ内に遊嵌状態で収容されているので、第１狭持部材１１と第２狭持部材１４１とにずれが生じていても、ナット１７ｂと凹部１５１ｊとの隙間を利用して、第１狭持部材１１と第２狭持部材１４１とのずれを吸収することができ、連結ボルト１７ａとナット１７ｂとの螺合作業を簡便に行うことができる。 Further, since the nut 17b is loosely fitted in the recess 151j, even if the first holding member 11 and the second holding member 141 are misaligned, the gap between the nut 17b and the recess 151j can be maintained. By using this, the deviation between the first holding member 11 and the second holding member 141 can be absorbed, and the screwing operation of the connection bolt 17a and the nut 17b can be easily performed.

また、連結ボルト１７ａとナット１７ｂとの螺合作業時には、凹部１５１ｊの内壁によりナット１７ｂの回動が規制され、連結ボルト１７ａとナット１７ｂとを確実に螺合することができる。すなわち、凹部１５１ｊの内壁は、本変形例２における回動規制手段を構成しており、作業者がナット１７ｂを回動不能に押さえていなくても連結ボルト１７ａとナット１７ｂとの螺合作業を行うことができる。 Further, when the connecting bolt 17a and the nut 17b are screwed together, the rotation of the nut 17b is restricted by the inner wall of the recess 151j, so that the connecting bolt 17a and the nut 17b can be securely screwed together. In other words, the inner wall of the concave portion 151j constitutes the rotation restricting means in the second modification, and even if the operator does not press the nut 17b so that it cannot rotate, the screwing operation of the connecting bolt 17a and the nut 17b can be performed. It can be carried out.

次に、フランジ補強具の変形例３について説明する。図１５に示されるように、第２狭持部材１４２の狭持鍔部１５２ｃには、下方に開口する収容部としての凹部１５２ｊが形成されており、凹部１５２ｊの開口側には、凹部１５２ｊの外径側に向かって切り欠かれた切欠凹部１５２ｒ，１５２ｒが対向して形成されている。この切欠凹部１５２ｒは、第２狭持部材１４２の下方と凹部１５２ｊ側に向けて開口しており、弾性体１５２ｓが圧入されている。凹部１５２ｊ内に配置されたナット１７ｂは弾性体１５２ｓ，１５２ｓにより係止され凹部１５２ｊからの抜け出しが規制されている。すなわち、弾性体１５２ｓ，１５２ｓは、本変形例３における落下防止手段を構成している。これによれば、凹部１５２ｊ内にナット１７ｂを配置した後、弾性体１５２ｓ，１５２ｓを切欠凹部１５２ｒ，１５２ｒに圧入設置できるので、ナット１７ｂを凹部１５２ｊに設置する作業が簡便である。尚、本変形例３における落下防止手段は、弾性体１５２ｓに限られず、凹部１５２ｊに対して装着可能であれば、充填材や金属製、樹脂製の板材などであってもよい。また、凹部１５２ｊの形成箇所や大きさ、個数も上記に限られない。 Next, Modified Example 3 of the flange reinforcing member will be described. As shown in FIG. 15, the holding collar portion 152c of the second holding member 142 is formed with a recess 152j as a housing portion that opens downward. Cutout recesses 152r, 152r cut out toward the outer diameter side are formed facing each other. The notch recess 152r is open toward the lower side of the second holding member 142 and the recess 152j side, and the elastic body 152s is press-fitted. The nut 17b arranged in the recess 152j is locked by elastic bodies 152s, 152s and is restricted from coming out of the recess 152j. That is, the elastic bodies 152s, 152s constitute fall prevention means in the third modification. According to this, after arranging the nut 17b in the recess 152j, the elastic bodies 152s, 152s can be press-fitted into the notch recesses 152r, 152r, so that the operation of installing the nut 17b in the recess 152j is simple. Note that the fall prevention means in Modification 3 is not limited to the elastic body 152s, and may be a filler, a metal plate, or a resin plate as long as it can be attached to the recess 152j. Further, the location, size, and number of recesses 152j are not limited to those described above.

次に、フランジ補強具の変形例４について説明する。図１６に示されるように、第２狭持部材１４３の狭持鍔部１５３ｃには、外径側に開放する切欠溝部１５３ｊが略水平方向に延びて形成されている。この切欠溝部１５３ｊは、狭持鍔部１５２ｃの上面よりも若干下方の位置に形成されており、狭持鍔部１５３ｃの貫通孔部１５ｆに連通している。ナット１７ｂは、切欠溝部１５３ｊの外径側の開口から挿入されるようになっており、該ナット１７ｂが切欠溝部１５３ｊの内径側端部に接触すると、ナット１７ｂの雌ネジ部１７ｃと貫通孔部１５ｆとが上下方向に重畳するようになっている。このように、切欠溝部１５３ｊの内径側端部によりナット１７ｂと貫通孔部１５ｆとの位置決めを簡便に行うことができる。尚、切欠溝部１５３ｊにナット１７ｂを配置した後、切欠溝部１５３ｊからナット１７ｂが抜け出さないように図示しない弾性体や充填材等の落下防止手段を切欠溝部１５３ｊの開口側（外径側）に設置すればよい。 Next, Modified Example 4 of the flange reinforcing member will be described. As shown in FIG. 16, the holding flange 153c of the second holding member 143 is formed with a notch groove 153j that opens radially outward and extends in a substantially horizontal direction. The notch groove 153j is formed at a position slightly lower than the upper surface of the holding flange 152c and communicates with the through hole 15f of the holding flange 153c. The nut 17b is inserted through an opening on the outer diameter side of the notch groove portion 153j. 15f are superimposed in the vertical direction. Thus, the nut 17b and the through-hole portion 15f can be easily positioned by the inner diameter side end portion of the notch groove portion 153j. After arranging the nut 17b in the notch groove 153j, drop prevention means (not shown) such as an elastic body or filler is installed on the opening side (outer diameter side) of the notch groove 153j so that the nut 17b does not slip out of the notch groove 153j. do it.

次に、フランジ補強具の変形例５について説明する。図１７に示されるように、第２狭持部材１４４の狭持鍔部１５４ｃには、下方に開口する凹部１５４ｊが形成されており、凹部１５４ｊの開口側には、凹部１５２ｊを挟んだ対向する位置にネジ孔１５４ｒ，１５４ｒが形成されている。このネジ孔１５４ｒ，１５４ｒには、ネジ１５４ｓ，１５４ｓが螺合しており、凹部１５２ｊに向けて進退可能となっている。ネジ１５４ｓ，１５４ｓを凹部１５２ｊから退避した状態として凹部１５２ｊにナット１７ｂを簡便に配置できるとともに、ネジ１５４ｓ，１５４ｓを凹部１５２ｊに進行させることで簡便にナット１７ｂを凹部１５２ｊから抜け出し不能とすることができる。すなわち、ネジ１５４ｓ，１５４ｓは、本変形例５における落下防止手段を構成している。 Next, Modified Example 5 of the flange reinforcing member will be described. As shown in FIG. 17, the holding collar portion 154c of the second holding member 144 is formed with a concave portion 154j that opens downward. Screw holes 154r, 154r are formed at positions. Screws 154s, 154s are screwed into the screw holes 154r, 154r so that they can advance and retreat toward the recess 152j. With the screws 154s, 154s retracted from the recess 152j, the nut 17b can be easily arranged in the recess 152j, and by advancing the screws 154s, 154s into the recess 152j, the nut 17b can be easily prevented from being removed from the recess 152j. can. That is, the screws 154s, 154s constitute fall prevention means in the fifth modification.

次に、フランジ補強具の変形例６について説明する。図１８に示されるように、第２狭持部材１４５の狭持鍔部１５５ｃには、下方に開口する凹部１５５ｊが形成されており、凹部１５５ｊの内壁には、シート状の弾性体１５５ｓが貼着あるいは加硫等で設けられている。ナット１７ｂは、弾性体１５５ｓを弾性変形させながら凹部１５５ｊ内に配置される。これによれば、ナット１７ｂと凹部１５５ｊとの間で圧接される弾性体１５５ｓの弾性復元力によりナット１７ｂが凹部１５５ｊから落下することが防止される。すなわち、弾性体１５５ｓは、本変形例６における落下防止手段を構成している。 Next, Modified Example 6 of the flange reinforcing member will be described. As shown in FIG. 18, the holding collar portion 155c of the second holding member 145 is formed with a recess 155j that opens downward, and a sheet-like elastic body 155s is attached to the inner wall of the recess 155j. It is provided by adhesion or vulcanization. The nut 17b is arranged in the recess 155j while elastically deforming the elastic body 155s. Accordingly, the nut 17b is prevented from falling from the recess 155j by the elastic restoring force of the elastic body 155s pressed between the nut 17b and the recess 155j. In other words, the elastic body 155s constitutes fall prevention means in the sixth modification.

尚、弾性体１５５ｓを摩擦係数の高い部材で構成し、ナット１７ｂと弾性体１５５ｓとの間で生じる摩擦力によりナット１７ｂが凹部１５５ｊから落下し難くなっていることが好ましく、それぞれが接着されていてもよい。さらに尚、本変形例６では、弾性体１５５ｓが凹部１５５ｊの内壁に形成される形態を例示したが、ナット１７ｂの外周面に形成されていてもよい。また、ナット１７ｂと凹部１５５ｊとの間に配置される落下防止手段は弾性体１５５ｓに限られず、例えば、ナット１７ｂを凹部１５５ｊに配置した後、充填される充填材等であってもよい。このようにすることで、絶縁処理することもでき、防錆効果を上げることもできる。また、凹部１５５ｊの内壁とナット１７ｂとの接触による傷発生の虞もなくなる。 It is preferable that the elastic body 155s is made of a material having a high coefficient of friction so that the nut 17b does not easily fall out of the recess 155j due to the frictional force generated between the nut 17b and the elastic body 155s. may Furthermore, although the elastic body 155s is formed on the inner wall of the recess 155j in Modification 6, the elastic body 155s may be formed on the outer peripheral surface of the nut 17b. Further, the fall prevention means arranged between the nut 17b and the recess 155j is not limited to the elastic body 155s, and may be, for example, a filler filled after the nut 17b is arranged in the recess 155j. By doing so, it is possible to carry out an insulation treatment and to improve the rust prevention effect. Further, there is no risk of damage due to contact between the inner wall of the recess 155j and the nut 17b.

尚、上記変形例２～６の凹部１５１ｊ～１５５ｊは、前記実施例におけるナット１８ｂを収容する凹部１２ｋ，１５ｋにも適用できる。 The recesses 151j to 155j of Modifications 2 to 6 can also be applied to the recesses 12k and 15k for accommodating the nuts 18b in the above embodiment.

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

例えば、前記実施例では、第１狭持部材１１及び第２狭持部材１４が分割体１２，１２’及び分割体１５，１５’の結合により、平面視において円環状を成す形態を例示したが、例えば、平面視において無端状であれば、楕円形や小判形、矩形などの非円形形状であってもよい。また、分割体１２，１２’を別形状としてもよく、更に分割体１５，１５’を別形状としてもよい。 For example, in the above-described embodiment, the first holding member 11 and the second holding member 14 have an annular shape in plan view by joining the divided bodies 12, 12' and the divided bodies 15, 15'. For example, it may have a non-circular shape such as an ellipse, an oval, or a rectangle as long as it is endless in plan view. Also, the divided bodies 12, 12' may have different shapes, and the divided bodies 15, 15' may have different shapes.

また、前記実施例では、補修弁４を接続部材とし、流体管３の分岐首部３ｂ及び接続管５を管路構成部材として説明したが、管路構成部材の間に接続部材がフランジ接続されていれば、接続部材及び管路構成部材は自由に変更できる。また、補修弁４は、操作ハンドルを備えるレバー式としたが、キャップ式でもよい。 Further, in the above-described embodiment, the repair valve 4 is used as a connection member, and the branch neck portion 3b of the fluid pipe 3 and the connection pipe 5 are used as pipeline components. If so, the connection member and the conduit component can be freely changed. Moreover, although the repair valve 4 is of a lever type having an operation handle, it may be of a cap type.

また、前記実施例及び変形例２～６では、ナット１７ｂを収容する収容部の内壁を回動規制手段として説明したが、ナット１７ｂの回動を規制できるものであればよく、例えば、狭持部材から突出し、ナット１７ｂの外周面に接触する複数の突出片、ねじ、別部品等であってもよい。 In addition, in the above-described embodiment and Modifications 2 to 6, the inner wall of the accommodating portion that accommodates the nut 17b has been described as the rotation restricting means. It may be a plurality of protruding pieces, screws, separate parts, etc. that protrude from the member and contact the outer peripheral surface of the nut 17b.

また、前記変形例１の切欠きは、外径側に開放するように切り欠かれているが、切欠きが形成されていれば、これに限らず、例えば周方向に開放するように切り欠かれてもよい。 In addition, the notches in Modification 1 are notched so as to open to the outer diameter side. may be taken.

３流体管（管路構成部材）
３ｂ分岐首部
３ｃ分岐部フランジ（両フランジ）
４補修弁（接続部材）
４ｃフランジ
４ｄフランジ
５接続管（管路構成部材）
５ａフランジ（両フランジ）
１０フランジ補強具
１１第１狭持部材（上方の狭持部材）
１２，１２’ 分割体
１２ｆ貫通孔部（挿通部）
１２ｇ結合部（下方の接合部）
１２ｋ凹部（収容部）
１２ｐ結合部（上方の接合部）
１４第２狭持部材（下方の狭持部材）
１５，１５’ 分割体
１５ｆ貫通孔部（挿通部）
１５ｇ結合部（上方の接合部）
１５ｊ凹部（収容部、回動規制手段）
１５ｐ結合部（下方の接合部）
１７ａ連結ボルト
１７ｂナット
１７ｃ雌ネジ部
１８結合部材
１８ａボルト（結合ボルト）
１８ｂナット
１８ｃ螺合部
１９吊支装置
２０弁筐
１１１第１狭持部材（上方の狭持部材）
１４１～１４５第２狭持部材
１５１ｊ凹部（収容部、回動規制手段）
１５１ｒ突起（落下防止手段）
１５２ｊ凹部（収容部、回動規制手段）
１５２ｓ弾性体（落下防止手段）
１５３ｊ切欠溝部（収容部、回動規制手段）
１５４ｊ凹部（収容部、回動規制手段）
１５４ｓネジ（落下防止手段）
１５５ｊ凹部（収容部、回動規制手段）
１５５ｓ弾性体（落下防止手段） 3 Fluid pipe (pipe line component)
3b branch neck 3c branch flange (both flanges)
4 repair valve (connection member)
4c Flange 4d Flange 5 Connection pipe (pipe line constituent member)
5a flange (both flanges)
10 Flange reinforcement 11 First holding member (upper holding member)
12, 12' divided body 12f through-hole portion (insertion portion)
12g joint (lower joint)
12k concave portion (accommodating portion)
12p junction (upper junction)
14 Second holding member (lower holding member)
15, 15' divided body 15f through-hole portion (insertion portion)
15g joint (upper joint)
15j concave portion (receiving portion, rotation restricting means)
15p junction (lower junction)
17a connecting bolt 17b nut 17c female screw portion 18 coupling member 18a bolt (coupling bolt)
18b nut 18c threaded portion 19 suspension device 20 valve housing 111 first holding member (upper holding member)
141 to 145 Second holding member 151j Recessed portion (receiving portion, rotation restricting means)
151r projection (fall prevention means)
152j concave portion (receiving portion, rotation restricting means)
152s elastic body (fall prevention means)
153j Notch groove portion (receiving portion, rotation restricting means)
154j concave portion (receiving portion, rotation restricting means)
154s screw (fall prevention means)
155j concave portion (receiving portion, rotation restricting means)
155s elastic body (fall prevention means)

Claims

Both flanges of a pipeline construction member joined to both flanges of a connection member having flanges on both upper and lower ends are held by a pair of upper and lower annular holding members, and the pair of holding members are held vertically by connecting bolts. A flange stiffener that reinforces a flange joint by connecting in a direction,
The upper holding member is formed with an insertion portion through which the shaft portion of the connecting bolt can be inserted and the head portion of the connecting bolt can be locked to the peripheral edge . A nut having a female screw portion to which a connecting bolt can be screwed is formed at a position corresponding to the insertion portion in the vertical direction. A flange stiffener positioned relative to the holding member .

2. A flange reinforcing member according to claim 1 , wherein said lower holding member has an accommodation portion for accommodating said nut in a loosely fitted state.

3. The flange reinforcing tool according to claim 2 , wherein the rotation restricting means is an inner wall of the accommodating portion.

The holding member has a plurality of divided bodies divided in the circumferential direction and a plurality of vertically extending connecting bolts connecting the plurality of divided bodies, and the divided bodies are provided at both ends in the circumferential direction. The joint portion of the divided body overlaps the joint portion of the adjacent divided body in the vertical direction, and the upper joint portion is provided with an insertion hole into which the connecting bolt can be loosely inserted. 4. The flange reinforcing tool according to claim 1, wherein the joint portion on the lower side is provided with a threaded portion into which the shaft portion of the connecting bolt can be screwed.

5. The flange reinforcing tool according to claim 4 , wherein the connecting bolts of the upper holding member and the connecting bolts of the lower holding member are arranged at positions overlapping each other in the vertical direction.