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JP7541402B2 - How to install flange reinforcement - Google Patents

How to install flange reinforcement Download PDF

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Publication number
JP7541402B2
JP7541402B2 JP2023103037A JP2023103037A JP7541402B2 JP 7541402 B2 JP7541402 B2 JP 7541402B2 JP 2023103037 A JP2023103037 A JP 2023103037A JP 2023103037 A JP2023103037 A JP 2023103037A JP 7541402 B2 JP7541402 B2 JP 7541402B2
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clamping member
flange
lower clamping
pressing
fastening mechanism
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JP2023134504A (en
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浩之 戸次
大介 酒井
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Waterworks Technology Development Organization Co Ltd
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Waterworks Technology Development Organization Co Ltd
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  • Clamps And Clips (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Description

本発明は、対向する一対のフランジ部を上下方向に挟持する挟持部材と、挟持部材を上下方向に沿って締結する締結機構とを備えたフランジ補強具の設置方法に関する。 The present invention relates to a method for installing a flange reinforcement device that includes a clamping member that clamps a pair of opposing flanges in the vertical direction and a fastening mechanism that fastens the clamping member in the vertical direction.

従来、弁ケース（補修弁ケース）を短管と弁箱とで構成し、短管の端部から径外方向に突出した第一突出部（フランジ部）と弁箱の端部から径外方向に突出した第二突出部（フランジ部）とをボルトで接合した分割部に装着されるフランジ補強具が知られている（例えば、特許文献１参照）。 Conventionally, a flange reinforcement device is known that is attached to a partition section where a valve case (repair valve case) is composed of a short pipe and a valve box, and a first protruding section (flange section) protruding radially outward from the end of the short pipe and a second protruding section (flange section) protruding radially outward from the end of the valve box are joined by bolts (see, for example, Patent Document 1).

特許文献１に記載のフランジ補強具は、第一突出部と第二突出部とを挟持する挟持部材と、挟持部材を分割部の接合方向（上下方向）に引き寄せて固定する締結機構とを備え、これら挟持部材が第一突出部の外側面のうち、ボルトの頭部の周方向に沿った両側の領域を押圧する２つの押圧部を有している。この構成を備えることにより、補修弁の老朽化に伴いボルトが強度低下を招いている場合でも、フランジ補強具によって分割部のボルト周りが補強され、分割部の隙間からの漏水を防止することができるものである。特に、特許文献１に記載のフランジ補強具は、ボルトの頭部の両側の領域を押圧しているので、補修弁ケースのようにボルトより径内方向の部位の空間が狭隘である場合でも装着することが可能であり、利便性が高いものとなっている。 The flange reinforcement described in Patent Document 1 includes a clamping member that clamps the first protrusion and the second protrusion, and a fastening mechanism that pulls the clamping member in the joining direction (up and down) of the divided parts and fixes it in place. The clamping member has two pressing parts that press the areas on both sides of the outer surface of the first protrusion along the circumferential direction of the bolt head. With this configuration, even if the strength of the bolt decreases due to aging of the repair valve, the flange reinforcement reinforces the area around the bolt in the divided part, and water leakage from the gap in the divided part can be prevented. In particular, since the flange reinforcement described in Patent Document 1 presses the areas on both sides of the bolt head, it can be attached even in cases where the space in the radial direction of the bolt is narrow, such as in the repair valve case, and is highly convenient.

特開２０１６－２３６５９号公報JP 2016-23659 A

ところで、分割部を有する補修弁ケースを収容しているマンホールの側壁と補修弁ケースとの間隔が狭い場合がある。この場合、該間隔にフランジ補強具を挿入して挟持部材を分割部に仮装着した後、締結機構を操作して挟持部材を分割部に本固定する作業が限定された空間で実行されることとなる。このため、挟持部材を十分に保持することができず、締結機構を操作した際、挟持部材が回転してしまい、押圧部の押圧位置が所望の位置からずれるおそれがあり、最悪の場合、フランジ補強具が落下するおそれがあった。 However, there are cases where the gap between the side wall of the manhole housing the repair valve case having a split section and the repair valve case is narrow. In such cases, the flange reinforcement tool is inserted into the gap, the clamping member is temporarily attached to the split section, and then the fastening mechanism is operated to permanently fix the clamping member to the split section, which is performed in a limited space. As a result, the clamping member cannot be held securely, and when the fastening mechanism is operated, the clamping member may rotate, causing the pressing position of the pressing part to shift from the desired position, and in the worst case scenario, the flange reinforcement tool may fall off.

そこで、作業効率の高いフランジ補強具の設置方法が望まれている。 Therefore, a method for installing flange reinforcements with high work efficiency is desired.

本発明に係るフランジ補強具の設置方法の特徴構成は、対向する一対の第一フランジ部を上下方向に挟持する下側挟持部材と、前記第一フランジ部よりも上方に位置し対向する一対の第二フランジ部を前記上下方向に挟持する上側挟持部材と、前記上側挟持部材と前記下側挟持部材を前記上下方向に沿って締結する締結機構と、を備えたフランジ補強具の設置方法であって、前記下側挟持部材及び前記上側挟持部材は夫々、第一分割体と、前記第一分割体に接続された第二分割体と、を有しており、前記下側挟持部材及び前記上側挟持部材を前記第一フランジ部又は前記第二フランジ部に側方から当接させた状態で、地上から保持治具を操作して、前記保持治具の当接係止部を前記下側挟持部材の上面に当接させた状態で前記下側挟持部材を前記第一フランジ部に向かって押圧して保持する保持工程と、前記保持治具により前記下側挟持部材を保持した状態で、上方から前記締結機構を締付ける締結工具を挿入して操作することにより、前記上側挟持部材と前記下側挟持部材とを締結させる締結工程と、を含む点にある。 A characteristic configuration of the flange reinforcing tool installation method according to the present invention is a flange reinforcing tool including a lower clamping member that vertically clamps a pair of opposing first flange portions, an upper clamping member that vertically clamps a pair of opposing second flange portions located above the first flange portions, and a fastening mechanism that fastens the upper clamping member and the lower clamping member along the vertical direction, wherein the lower clamping member and the upper clamping member each have a first division body and a second division body connected to the first division body, and the lower clamping member a holding process in which a holding jig is operated from the ground to press and hold the lower clamping member toward the first flange portion with the abutment engaging portion of the holding jig abutting the upper surface of the lower clamping member while the holding member and the upper clamping member are abutted laterally against the first flange portion or the second flange portion, and a fastening process in which, while the lower clamping member is held by the holding jig, a fastening tool that tightens the fastening mechanism from above is inserted and operated, thereby fastening the upper clamping member and the lower clamping member together.

本方法では、下側挟持部材及び上側挟持部材により第一フランジ部及び第二フランジ部の２つのフランジ部を同時に補強することができる。また、保持工程において、下側挟持部材及び上側挟持部材を第一フランジ部又は第二フランジ部に側方から当接させた状態で、地上から保持治具を操作することにより、下側挟持部材が第一フランジ部に向かって押圧される。その結果、締結工程において締結機構を締付けて下側挟持部材を第一フランジ部に固定するとき、下側挟持部材が回転することを防止できる。更に、保持治具は地上から挿入し操作することができるため、マンホールの側壁と補修弁ケースとの間隔が狭い場合でも、下側挟持部材及び上側挟持部材を第一フランジ部又は第二フランジ部に固定することができる。その結果、フランジ部の周辺環境に左右されず、フランジ補強具を作業効率良く設置することができる。 In this method, the two flanges, the first flange and the second flange, can be reinforced simultaneously by the lower clamping member and the upper clamping member. In addition, in the holding step, the lower clamping member is pressed toward the first flange by operating the holding jig from the ground while the lower clamping member and the upper clamping member are in contact with the first flange or the second flange from the side. As a result, when the fastening mechanism is tightened to fix the lower clamping member to the first flange in the fastening step, the lower clamping member can be prevented from rotating. Furthermore, since the holding jig can be inserted and operated from the ground, the lower clamping member and the upper clamping member can be fixed to the first flange or the second flange even if the gap between the side wall of the manhole and the repair valve case is narrow. As a result, the flange reinforcement can be installed efficiently without being affected by the surrounding environment of the flange.

他の特徴構成は、前記締結機構は、ボルト及びナットを有する点にある。 Another characteristic feature is that the fastening mechanism includes a bolt and a nut.

本構成の締結機構のように、ボルト及びナットを有していれば、上方から締結機構を締付ける締結工具を挿入して締結することが可能となるため、作業効率を更に高めることができる。 If the fastening mechanism of this configuration has bolts and nuts, it is possible to insert a fastening tool to tighten the fastening mechanism from above, further improving work efficiency.

他の特徴構成は、前記締結工程は、前記下側挟持部材と前記上側挟持部材を近接移動させる点にある。 Another characteristic feature is that the fastening process moves the lower clamping member and the upper clamping member closer to each other.

本構成のように下側挟持部材と上側挟持部材を近接移動させれば、第一フランジ部及び第二フランジ部の接合面からの漏水を防止できる。 By moving the lower clamping member and the upper clamping member closer together as in this configuration, water leakage from the joint surface of the first flange portion and the second flange portion can be prevented.

他の特徴構成は、前記フランジ補強具は、前記下側挟持部材と前記上側挟持部材との間に間隔保持部材を更に備えている点にある。 Another characteristic feature is that the flange reinforcement further includes a spacing member between the lower clamping member and the upper clamping member.

本構成のように下側挟持部材と上側挟持部材との間に間隔保持部材を備えていれば、下側挟持部材と上側挟持部材の間隔を保持することができる。 If a spacing member is provided between the lower clamping member and the upper clamping member as in this configuration, the spacing between the lower clamping member and the upper clamping member can be maintained.

筒状部材の斜視図である。FIG. 分割部の平面図である。FIG. 筒状部材の拡大縦断面図である。FIG. 2 is an enlarged vertical cross-sectional view of a tubular member. 上側挟持部材の被挿入部の概略構成を示す図である。4A and 4B are diagrams showing a schematic configuration of an inserted portion of an upper clamping member. 上側挟持部材の挿入部の概略構成を示す図である。4A and 4B are diagrams showing a schematic configuration of an insertion portion of an upper clamping member. 下側挟持部材の被挿入部の概略構成を示す図である。4A and 4B are diagrams showing a schematic configuration of an inserted portion of a lower clamping member. 下側挟持部材の挿入部の概略構成を示す図である。4A and 4B are diagrams showing a schematic configuration of an insertion portion of a lower clamping member. マンホール内でフランジ部にフランジ補強具を取付けた状態を示す側面図である。1 is a side view showing the state in which a flange reinforcement is attached to a flange portion inside a manhole. FIG. マンホール内でフランジ部にフランジ補強具を取付けた状態を示す平面図である。1 is a plan view showing the state in which a flange reinforcement is attached to a flange portion inside a manhole. FIG. 図９のX-X矢視図である。FIG. 10 is a view taken along the line X-X of FIG. 9 . フランジ補強具の設置治具の全体斜視図である。FIG. 2 is an overall perspective view of an installation jig for a flange reinforcing member. フランジ補強具の設置治具の部分斜視図である。FIG. 13 is a partial perspective view of an installation jig for a flange reinforcing member. マンホール内でのフランジ補強具の設置方法の第一工程～第二工程を示す図である。1A to 1C are diagrams showing the first and second steps of a method for installing a flange reinforcement in a manhole. マンホール内でのフランジ補強具の設置方法の第三工程を示す図である。A figure showing the third step of the method for installing a flange reinforcement in a manhole. マンホール内でのフランジ補強具の設置方法の第四工程～第五工程を示す図である。A figure showing the fourth and fifth steps of the method for installing a flange reinforcement in a manhole. 別実施形態１に係るフランジ補強具の縦断面図である。FIG. 11 is a vertical cross-sectional view of a flange reinforcing tool according to a first alternative embodiment. 別実施形態２に係る設置治具の部分斜視図である。FIG. 11 is a partial perspective view of an installation jig according to another embodiment 2.

以下に、本発明に係るフランジ補強具の設置治具およびフランジ補強具の設置方法の実施形態について、図面に基づいて説明する。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。以下、重力方向を下、重力方向とは反対方向を上として説明する。 Below, an embodiment of the flange reinforcement installation jig and flange reinforcement installation method according to the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiment, and various modifications are possible without departing from the gist of the invention. In the following description, the direction of gravity is considered to be down, and the direction opposite to the direction of gravity is considered to be up.

本実施形態では、フランジ補強具（以下、「補強具Ｐ」と言う。）を用いて、両フランジ部１１ａ，Ｔａおよび両フランジ部Ｖａ，１２ａを補強すると共に、弁箱Ｖと短管Ｔとで構成される鋳鉄製の補修弁ケースＸの分割部１に押付力を作用させることにより、分割部１からの漏水を防止する場合を説明する。 In this embodiment, a flange reinforcing device (hereinafter referred to as "reinforcing device P") is used to reinforce both flange portions 11a, Ta and both flange portions Va, 12a, and a pressing force is applied to the divided portion 1 of the cast iron repair valve case X, which is composed of a valve box V and a short pipe T, to prevent water leakage from the divided portion 1.

図１～図３には、接続管１１（第一筒状部材），短管Ｔ（第二筒状部材），弁箱Ｖ（第三筒状部材）および分岐管１２（第四筒状部材）と、短管Ｔと弁箱Ｖとの分割部１が示される。短管Ｔの一端には、弁箱Ｖの第二分割部１Ｂが接合される第一分割部１Ａが、短管Ｔの径外方向に突出形成されている。短管Ｔの他端には、空気弁や消火栓などの接続管１１の径外方向に突出した円盤状の接続フランジ部１１ａ（第二のフランジ部の一例）が取付けられる円盤状の短管フランジ部Ｔａ（第二のフランジ部の一例）が、短管Ｔの径外方向に突出形成されている。また、弁箱Ｖの一端には、短管Ｔの第一分割部１Ａが接合される第二分割部１Ｂが、弁箱Ｖの径外方向に突出形成されている。弁箱Ｖの他端には、水道本管（不図示）の分岐管１２の径外方向に突出した円盤状の分岐フランジ部１２ａ（第一のフランジ部の一例）が取付けられる円盤状の弁箱フランジ部Ｖａ（第一のフランジ部の一例）が、弁箱Ｖの径外方向に延出形成されている。 1 to 3 show a connecting pipe 11 (first cylindrical member), a short pipe T (second cylindrical member), a valve box V (third cylindrical member), and a branch pipe 12 (fourth cylindrical member), as well as a divided portion 1 between the short pipe T and the valve box V. At one end of the short pipe T, a first divided portion 1A to which the second divided portion 1B of the valve box V is joined is formed so as to protrude in the radially outward direction of the short pipe T. At the other end of the short pipe T, a disk-shaped short pipe flange portion Ta (an example of a second flange portion) to which a disk-shaped connecting flange portion 11a (an example of a second flange portion) protruding in the radially outward direction of the short pipe T is attached is formed. At one end of the valve box V, a second divided portion 1B to which the first divided portion 1A of the short pipe T is joined is formed so as to protrude in the radially outward direction of the valve box V. At the other end of the valve box V, a disk-shaped valve box flange portion Va (an example of a first flange portion) is attached to a disk-shaped branch flange portion 12a (an example of a first flange portion) that protrudes radially outward from a branch pipe 12 of a water main (not shown). The disk-shaped branch flange portion Va (an example of a first flange portion) is attached to the other end of the valve box V and extends radially outward from the valve box V.

第一分割部１Ａおよび第二分割部１Ｂは、平面視矩形状に形成されている。これら第一分割部１Ａおよび第二分割部１Ｂには、後述するボール弁体Ｖｂを回動操作可能な操作部１０が接続されている。 The first division 1A and the second division 1B are formed in a rectangular shape in a plan view. An operating unit 10 capable of rotating the ball valve body Vb described below is connected to the first division 1A and the second division 1B.

図２～図３に示すように、第二分割部１Ｂには、接合方向（上下方向）に貫通する複数（本実施形態では４箇所）の貫通孔３ｂが周方向に離間して形成されている。また、第一分割部１Ａには、接合面１ｂとは反対側が閉塞された複数の孔部３ａ（本実施形態では４箇所）が周方向に離間して形成されている。夫々の孔部３ａの内周面には雌ねじ３ｃが形成されており、第一分割部１Ａからボルト４が突出しないように、雄ねじ４ｂを雌ねじ３ｃに螺合することで第一分割部１Ａおよび第二分割部１Ｂが接合されている。つまり、第二分割部１Ｂの外側面１ａにはボルト４の頭部４ａが露出している。 As shown in Figures 2 and 3, the second divided portion 1B has a plurality of (four in this embodiment) through holes 3b that penetrate in the joining direction (vertical direction) and are spaced apart in the circumferential direction. The first divided portion 1A has a plurality of (four in this embodiment) holes 3a that are closed on the side opposite the joining surface 1b and are spaced apart in the circumferential direction. A female thread 3c is formed on the inner peripheral surface of each hole 3a, and the first divided portion 1A and the second divided portion 1B are joined by screwing a male thread 4b into the female thread 3c so that the bolt 4 does not protrude from the first divided portion 1A. In other words, the head 4a of the bolt 4 is exposed on the outer surface 1a of the second divided portion 1B.

図１に示すように、空気弁や消火栓などの接続管１１の接続フランジ部１１ａと短管Ｔの他端に形成された短管フランジ部Ｔａとは、ボルト４１ａ，ナット４１ｂで連結されている。水道管などの分岐管１２の分岐フランジ部１２ａと、弁箱Ｖの他端に形成された弁箱フランジ部Ｖａとは、ボルト４２ａ，ナット４２ｂで連結されている。 As shown in FIG. 1, the connection flange portion 11a of the connection pipe 11, such as an air valve or a fire hydrant, and the short pipe flange portion Ta formed at the other end of the short pipe T are connected with bolts 41a and nuts 41b. The branch flange portion 12a of the branch pipe 12, such as a water pipe, and the valve box flange portion Va formed at the other end of the valve box V are connected with bolts 42a and nuts 42b.

図３に示すように、弁箱Ｖの内部には、ボール弁体Ｖｂが収納されており、操作部１０の開閉操作によりボール弁体Ｖｂが回動し、流路の連通、非連通が切換えられる。 As shown in FIG. 3, a ball valve body Vb is housed inside the valve box V, and the ball valve body Vb rotates when the operating unit 10 is opened or closed, switching between open and closed flow paths.

以下、図１および図３に示す接続フランジ部１１ａ，短管フランジ部Ｔａ，第一分割部１Ａ，第二分割部１Ｂ，弁箱フランジ部Ｖａおよび分岐フランジ部１２ａにおいて、夫々が連結部材により連結された際に接合方向（以下、「上下方向」と言う場合がある。）で相互に対向する面を接合面１ｂとし、この接合面１ｂと平行で上下方向に垂直な外表面を外側面１ａとして説明する。また、接続フランジ部１１ａ，短管フランジ部Ｔａ，弁箱フランジ部Ｖａおよび分岐フランジ部１２ａにおける外周方向の面を外周面１ｃとして説明する。 In the following, in the connection flange portion 11a, short pipe flange portion Ta, first division portion 1A, second division portion 1B, valve box flange portion Va, and branch flange portion 12a shown in Figures 1 and 3, the surfaces that face each other in the joining direction (hereinafter sometimes referred to as the "vertical direction") when each is connected by a connecting member will be referred to as joining surface 1b, and the outer surface that is parallel to this joining surface 1b and perpendicular to the vertical direction will be referred to as outer surface 1a. In addition, the outer peripheral surfaces of the connection flange portion 11a, short pipe flange portion Ta, valve box flange portion Va, and branch flange portion 12a will be referred to as outer peripheral surface 1c.

（フランジ補強具の基本構成）
図８に示すように、補強具Ｐは、両フランジ部１１ａ，Ｔａおよび両フランジ部Ｖａ，１２ａに装着される鋳鉄製の上側挟持部材１０Ａ（第二の挟持部材の一例）および下側挟持部材１０Ｂ（第一の挟持部材の一例）と、上側挟持部材１０Ａと下側挟持部材１０Ｂとを近接させる近接方向の力を印加する連結機構Ｒと、を備えている。また、補強具Ｐは、上側挟持部材１０Ａと下側挟持部材１０Ｂとの間隔を保持する間隔保持部材９を備えている。 (Basic configuration of flange reinforcement)
8, the reinforcing tool P includes an upper clamping member 10A (an example of a second clamping member) and a lower clamping member 10B (an example of a first clamping member) made of cast iron that are attached to both flange portions 11a, Ta and both flange portions Va, 12a, and a connecting mechanism R that applies a force in a direction to bring the upper clamping member 10A and the lower clamping member 10B closer to each other. The reinforcing tool P also includes a spacing member 9 that maintains the spacing between the upper clamping member 10A and the lower clamping member 10B.

図８～図１０に示すように、上側挟持部材１０Ａは、接続管１１の接続フランジ部１１ａの外側面１ａにおいて、周方向に隣り合う２つのナット４１ｂの間の領域を押圧する２つの押圧部６Ｂ（第二押圧部の一例）を有する第一被挿入部６と、短管Ｔの短管フランジ部Ｔａの外側面１ａにおいて、周方向に隣り合う２つのボルト４１ａの頭部の間の領域を押圧する２つの押圧部５Ｃを有する第一挿入部５と、を備えている。また、これら第一挿入部５および第一被挿入部６を、接続管１１の接続フランジ部１１ａおよび短管Ｔの短管フランジ部Ｔａの接合方向に引き寄せて（近接させて）締付固定する上側締結機構Ｋａ（第二の締結機構の一例）を備えている。本実施形態における上側締結機構Ｋａは、後述する連結機構Ｒの連結ボルトＲａが兼用されている。 8 to 10, the upper clamping member 10A includes a first inserted portion 6 having two pressing portions 6B (an example of a second pressing portion) that press the area between two circumferentially adjacent nuts 41b on the outer surface 1a of the connection flange portion 11a of the connection pipe 11, and a first inserting portion 5 having two pressing portions 5C that press the area between the heads of two circumferentially adjacent bolts 41a on the outer surface 1a of the short pipe flange portion Ta of the short pipe T. The upper clamping mechanism Ka (an example of a second fastening mechanism) is provided to pull (bring close) the first inserting portion 5 and the first inserted portion 6 in the joining direction of the connection flange portion 11a of the connection pipe 11 and the short pipe flange portion Ta of the short pipe T and fasten them. The upper fastening mechanism Ka in this embodiment also serves as the connecting bolt Ra of the connecting mechanism R described later.

図４および図１０に示すように、第一被挿入部６は、金属部材により構成され、角筒部６Ａと、角筒部６Ａの四辺のうちの一辺からさらに外方側に延出する押圧部６Ｂとを一体的に備えている。角筒部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が両フランジ部１１ａ，Ｔａ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。また、押圧部６Ｂは、角筒部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 Figures 4 and 10, the first inserted portion 6 is made of a metal member and integrally comprises an angular tube portion 6A and a pressing portion 6B that extends further outward from one of the four sides of the angular tube portion 6A. In a cross-sectional view (a cross-sectional view perpendicular to the joining direction), the angular tube portion 6A is formed in a bottomed angular tube shape in which the outer surface 6a and the inner surface 6b have a trapezoidal shape that increases in diameter as they approach both flange portions 11a and Ta. In addition, the pressing portion 6B is formed by extending outward in a bifurcated manner from one of the four sides of the outer surface 6a of the angular tube portion 6A.

角筒部６Ａは、両フランジ部１１ａ，Ｔａの外周面１ｃ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１１ａ，Ｔａに当接可能な当接部６ｈを有している。第一挿入部５と第一被挿入部６とを上側締結機構Ｋａで固定する際、当接部６ｈが両フランジ部１１ａ，Ｔａに当接することで、上側挟持部材１０Ａの回転が阻止される。 The rectangular tube portion 6A is formed to protrude radially inward from both ends along the circumferential direction of the inner surface (outer surface 6a) that faces the outer peripheral surfaces 1c of both flange portions 11a and Ta, and has abutment portions 6h that can abut against both flange portions 11a and Ta. When the first insertion portion 5 and the first inserted portion 6 are fixed with the upper fastening mechanism Ka, the abutment portions 6h abut against both flange portions 11a and Ta, preventing rotation of the upper clamping member 10A.

角筒部６Ａの内部には、両フランジ部１１ａ，Ｔａの接合方向に沿って、後述する第一挿入部５の角筒部５Ａを受け入れる筒状内部空間６ｃが形成されている。筒状内部空間６ｃは横断面視で台形状に形成され、断面台形状の第一挿入部５の角筒部５Ａの外径よりも若干大きく形成されている。このため、第一挿入部５の角筒部５Ａの外面５ａと第一被挿入部６の角筒部６Ａの内面６ｂとの接合方向に垂直な断面形状は、第一挿入部５を第一被挿入部６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。 Inside the angular tube portion 6A, a cylindrical internal space 6c is formed along the joining direction of both flange portions 11a and Ta to receive the angular tube portion 5A of the first insertion portion 5 described later. The cylindrical internal space 6c is formed in a trapezoidal shape in cross section, and is formed slightly larger than the outer diameter of the angular tube portion 5A of the first insertion portion 5, which has a trapezoidal cross section. Therefore, the cross-sectional shape perpendicular to the joining direction between the outer surface 5a of the angular tube portion 5A of the first insertion portion 5 and the inner surface 6b of the angular tube portion 6A of the first inserted portion 6 is formed so that when the first insertion portion 5 is inserted into the first inserted portion 6, it can slide in the insertion direction (the longitudinal direction of the cylindrical internal space 6c), but cannot rotate relative to the insertion direction (around an axis along the longitudinal direction of the cylindrical internal space 6c).

また、筒状内部空間６ｃにおいて、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における押圧部６Ｂが形成された側は、後述する連結機構Ｒの連結ボルトＲａの雄ねじ部Ｒａ２が螺合すること無く挿入可能な挿通孔６ｄが、角筒部５Ａの底部を貫通する状態で開口形成されている。 The cylindrical internal space 6c has an opening on the side opposite to the side where the pressing portion 6B is formed. On the side of the cylindrical internal space 6c where the pressing portion 6B is formed, an insertion hole 6d is formed that penetrates the bottom of the square tube portion 5A and into which the male thread portion Ra2 of the connecting bolt Ra of the connecting mechanism R described below can be inserted without being screwed.

押圧部６Ｂは、平面視で腕の長さが同一の二股状に形成され、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。また、押圧部６Ｂのうち筒状内部空間６ｃの開口側の先端部位が、平坦な押圧面６ｅとして形成されている。 The pressing portion 6B is formed in a bifurcated shape with arms of the same length in a plan view, and is formed in a tapered shape that moves away from the insertion hole 6d as it approaches the tip. In addition, the tip portion of the pressing portion 6B on the opening side of the cylindrical internal space 6c is formed as a flat pressing surface 6e.

図５および図１０に示すように、第一挿入部５は、金属部材により構成され、角筒部５Ａと、角筒部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押圧部５Ｃとを一体的に備えている。
角筒部５Ａは、横断面視において、外面５ａが両フランジ部１１ａ，Ｔａ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。 As shown in Figures 5 and 10, the first insertion portion 5 is made of a metal member and integrally comprises an angular tube portion 5A, a flange-shaped portion 5B extending outward from the entire outer surface 5a of the angular tube portion 5A, and a pressing portion 5C extending further outward from one of the four sides of the flange-shaped portion 5B.
In cross section, the rectangular tube portion 5A has an outer surface 5a that is trapezoidal in shape and increases in diameter as it approaches the flange portions 11a and Ta, and an inner surface 5b that is circular in shape and has a bottom.

角筒部５Ａの内面５ｂは、後述する連結機構Ｒの連結ボルトＲａの雄ねじ部Ｒａ２が螺合すること無く挿通可能となっている。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、中央部分から角筒部５Ａが延出している。押圧部５Ｃは、平面視で腕の長さが同一の二股状に形成されている。また、押圧部５Ｃのうち角筒部５Ａ側の先端部位が、平坦な押圧面５ｅとして形成されている。 The inner surface 5b of the square tube portion 5A allows the male thread portion Ra2 of the connecting bolt Ra of the connecting mechanism R, which will be described later, to be inserted without being screwed. The flange portion 5B is formed in a trapezoidal shape in a cross section perpendicular to the joining direction, with the square tube portion 5A extending from the center. The pressing portion 5C is formed in a bifurcated shape with arms of the same length in a plan view. In addition, the tip portion of the pressing portion 5C on the square tube portion 5A side is formed as a flat pressing surface 5e.

図１０に示すように、上側締結機構Ｋａは、連結ボルトＲａと近接ナット９１と位置調整ナット９２とを有している。第一被挿入部６の押圧部６Ｂを接続管１１の接続フランジ部１１ａの外側面１ａに当接させた状態で、第一挿入部５の外面５ａに当接する位置調整ナット９２を連結ボルトＲａの雄ねじ部Ｒａ２に螺合することで、第一挿入部５の押圧部５Ｃが短管Ｔの短管フランジ部Ｔａの外側面１ａに当接し、第一挿入部５の第一被挿入部６に対する相対位置が調整される。そして、近接ナット９１を締め付けることにより、第一挿入部５および第一被挿入部６を両フランジ部１１ａ，Ｔａの接合方向に引き寄せて締結固定する。これにより、上側締結機構Ｋａが機能すると共に、第一被挿入部６の押圧部６Ｂが接続管１１の接続フランジ部１１ａを下側に押圧して分割部１の接合面１ｂからの漏水を防止するための連結機構Ｒが機能する。 10, the upper fastening mechanism Ka has a connecting bolt Ra, a proximity nut 91, and a position adjustment nut 92. With the pressing portion 6B of the first inserted portion 6 in contact with the outer surface 1a of the connection flange portion 11a of the connecting pipe 11, the position adjustment nut 92 in contact with the outer surface 5a of the first inserted portion 5 is screwed into the male thread portion Ra2 of the connecting bolt Ra, so that the pressing portion 5C of the first inserted portion 5 is in contact with the outer surface 1a of the short pipe flange portion Ta of the short pipe T, and the relative position of the first inserted portion 5 to the first inserted portion 6 is adjusted. Then, by tightening the proximity nut 91, the first inserted portion 5 and the first inserted portion 6 are pulled in the joining direction of both flange portions 11a and Ta and fastened and fixed. This allows the upper fastening mechanism Ka to function, and the pressing portion 6B of the first inserted portion 6 presses the connection flange portion 11a of the connection pipe 11 downward, allowing the connecting mechanism R to function to prevent water leakage from the joint surface 1b of the divided portion 1.

図８および図１０に示すように、下側挟持部材１０Ｂは、弁箱Ｖの弁箱フランジ部Ｖａの外側面１ａにおいて、周方向に隣り合う２つのナット４２ｂの間の領域を押圧する２つの押圧部７Ｂ（第一押圧部の一例）を有する第二被挿入部７と、分岐管１２の分岐フランジ部１２ａの外側面１ａにおいて、周方向に隣り合う２つのボルト４２ａの頭部の間の領域を押圧する２つの押圧部８Ｃを有する第二挿入部８と、を備えている。また、これら第二被挿入部７および第二挿入部８を、弁箱Ｖの弁箱フランジ部Ｖａおよび分岐管１２の分岐フランジ部１２ａの接合方向に引き寄せて（近接させて）締付固定する下側締結機構Ｋｂ（第一の締結機構の一例）を備えている。本実施形態における下側締結機構Ｋｂは、後述する連結機構Ｒの連結ボルトＲａが兼用されている。 8 and 10, the lower clamping member 10B includes a second inserted portion 7 having two pressing portions 7B (an example of a first pressing portion) that press the area between two circumferentially adjacent nuts 42b on the outer surface 1a of the valve box flange portion Va of the valve box V, and a second inserted portion 8 having two pressing portions 8C that press the area between the heads of two circumferentially adjacent bolts 42a on the outer surface 1a of the branch flange portion 12a of the branch pipe 12. In addition, the lower fastening mechanism Kb (an example of a first fastening mechanism) is provided that draws (brings close to) the second inserted portion 7 and the second inserted portion 8 in the joining direction of the valve box flange portion Va of the valve box V and the branch flange portion 12a of the branch pipe 12 and fastens and fixes them. The lower fastening mechanism Kb in this embodiment also serves as the connecting bolt Ra of the connecting mechanism R described later.

図６および図１０に示すように、第二被挿入部７は、金属部材により構成され、角筒部７Ａと押圧部７Ｂとを一体的に備えている。角筒部７Ａは、横断面視（接合方向と垂直な断面視）において、外面７ａおよび内面７ｂが両フランジ部Ｖａ，１２ａ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。また、押圧部７Ｂは、角筒部７Ａの外面７ａ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 Figures 6 and 10, the second inserted portion 7 is made of a metal member and integrally comprises an angular tube portion 7A and a pressing portion 7B. In a cross-sectional view (a cross-sectional view perpendicular to the joining direction), the angular tube portion 7A is formed as a trapezoidal bottomed angular tube whose outer surface 7a and inner surface 7b increase in diameter as they approach the flange portions Va and 12a. The pressing portion 7B is formed by extending outward in a bifurcated manner from one of the four sides of the outer surface 7a of the angular tube portion 7A.

角筒部７Ａは、両フランジ部Ｖａ，１２ａの外周面１ｃと対向する内表面（外面７ａ）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Ｖａ，１２ａに当接可能な一対の当接部７ｈを有している。第二被挿入部７と第二挿入部８とを下側締結機構Ｋｂで固定する際、当接部７ｈが両フランジ部Ｖａ，１２ａに当接することで、下側挟持部材１０Ｂの回転が阻止される。 The rectangular tube portion 7A is formed to protrude radially inward from both ends along the circumferential direction of the inner surface (outer surface 7a) that faces the outer peripheral surfaces 1c of both flange portions Va and 12a, and has a pair of abutment portions 7h that can abut against both flange portions Va and 12a. When the second inserted portion 7 and the second inserted portion 8 are fixed by the lower fastening mechanism Kb, the abutment portions 7h abut against both flange portions Va and 12a, preventing rotation of the lower clamping member 10B.

角筒部７Ａの内部には、両フランジ部Ｖａ，１２ａの接合方向に沿って、後述する第二挿入部８の角筒部８Ａを受け入れる筒状内部空間７ｃが形成されている。筒状内部空間７ｃは横断面視で台形状に形成され、台形状の角筒部８Ａの外径よりも若干大きく形成されている。このため、第二挿入部８の角筒部８Ａの外面８ａと第二被挿入部７の角筒部７Ａの内面７ｂとの接合方向に垂直な断面形状は、第二挿入部８を第二被挿入部７に挿入すると、挿入方向（筒状内部空間７ｃ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７ｃ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。 Inside the angular tube portion 7A, a cylindrical internal space 7c is formed along the joining direction of both flange portions Va and 12a to receive the angular tube portion 8A of the second insertion portion 8 described later. The cylindrical internal space 7c is formed in a trapezoidal shape in cross section and is formed slightly larger than the outer diameter of the trapezoidal angular tube portion 8A. Therefore, the cross-sectional shape perpendicular to the joining direction between the outer surface 8a of the angular tube portion 8A of the second insertion portion 8 and the inner surface 7b of the angular tube portion 7A of the second insertion portion 7 is formed so that when the second insertion portion 8 is inserted into the second insertion portion 7, it can slide in the insertion direction (the longitudinal direction of the cylindrical internal space 7c), but cannot rotate relative to the insertion direction (around an axis along the longitudinal direction of the cylindrical internal space 7c).

また、筒状内部空間７ｃにおいて、押圧部７Ｂ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７ｃにおける押圧部７Ｂが形成された側は、連結ボルトＲａの雄ねじ部Ｒａ２が螺合すること無く挿入可能な挿通孔７ｄが、角筒部７Ａの底部を貫通する状態で開口形成されている。 The cylindrical internal space 7c has an opening on the side opposite to the side where the pressing portion 7B is formed. On the side of the cylindrical internal space 7c where the pressing portion 7B is formed, an insertion hole 7d is formed that penetrates the bottom of the square tube portion 7A and into which the male thread portion Ra2 of the connecting bolt Ra can be inserted without being screwed.

押圧部７Ｂは、平面視で腕の長さが同一の二股状に形成され、先端側に行くにつれて挿通孔７ｄから遠ざかるテーパー形状に形成されている。また、押圧部７Ｂのうち筒状内部空間７ｃの開口側の先端部位が、平坦な押圧面７ｅとして形成されている。 The pressing portion 7B is formed in a bifurcated shape with arms of equal length in a plan view, and is tapered away from the insertion hole 7d as it approaches the tip. In addition, the tip of the pressing portion 7B on the opening side of the cylindrical internal space 7c is formed as a flat pressing surface 7e.

図７および図１０に示すように、第二挿入部８は、金属部材により構成され、角筒部８Ａと、角筒部８Ａの外面８ａから全周に亘って外方側に延出する鍔状部８Ｂと、鍔状部８Ｂの四辺のうちの一辺からさらに外方側に延出する押圧部８Ｃとを一体的に備えている。
角筒部８Ａは、横断面視において、外面８ａが両フランジ部Ｖａ，１２ａに近付くほど拡径する台形状を呈し、内面８ｂが円形状の有底角筒状で形成されている。 As shown in Figures 7 and 10, the second insertion portion 8 is made of a metal member and integrally comprises an angular tube portion 8A, a flange-shaped portion 8B extending outward from the entire circumference of the outer surface 8a of the angular tube portion 8A, and a pressing portion 8C extending further outward from one of the four sides of the flange-shaped portion 8B.
In cross section, the rectangular tube portion 8A has an outer surface 8a that is trapezoidal in shape and increases in diameter as it approaches the flange portions Va and 12a, and an inner surface 8b that is circular in shape and has a bottom.

角筒部８Ａの内面８ｂには、連結ボルトＲａの雄ねじ部Ｒａ２を螺合可能な雌ねじ部８ｆが形成されている。鍔状部８Ｂは、接合方向と垂直な断面視で台形状に形成され、中央部分から角筒部８Ａが延出している。押圧部８Ｃは、平面視で腕の長さが同一の二股状に形成されている。また、押圧部８Ｃのうち角筒部８Ａ側の先端部位が、平坦な押圧面８ｅとして形成されている。 A female thread 8f is formed on the inner surface 8b of the square tube portion 8A into which the male thread portion Ra2 of the connecting bolt Ra can be screwed. The flange portion 8B is formed in a trapezoidal shape in a cross section perpendicular to the joining direction, with the square tube portion 8A extending from the center. The pressing portion 8C is formed in a bifurcated shape with arms of the same length in a plan view. In addition, the tip portion of the pressing portion 8C on the square tube portion 8A side is formed as a flat pressing surface 8e.

図１０に示すように、下側締結機構Ｋｂは、連結ボルトＲａと押圧ナット９３と位置決めナット９４とを有している。連結ボルトＲａの雄ねじ部Ｒａ２を第二挿入部８の角筒部８Ａの内面８ｂの雌ねじ部８ｆに螺合し、位置決めナット９４により押圧ナット９３が第二被挿入部７の外面７ａを押圧するように固定された状態で連結ボルトＲａを締め付け、第二被挿入部７および第二挿入部８を両フランジ部Ｖａ，１２ａの接合方向に引き寄せて締結固定する。これにより、下側締結機構Ｋｂが機能すると共に、第二挿入部８の押圧部８Ｃが分岐管１２の分岐フランジ部１２ａを上側に押圧して分割部１の接合面１ｂからの漏水を防止するための連結機構Ｒが機能する。なお、第二被挿入部７の位置を固定するものであれば、押圧ナット９３および位置決めナット９４に限定されず、連結ボルトＲａに一体化した溶接ピース等であっても良い。 10, the lower fastening mechanism Kb has a connecting bolt Ra, a pressing nut 93, and a positioning nut 94. The male threaded portion Ra2 of the connecting bolt Ra is screwed into the female threaded portion 8f of the inner surface 8b of the square tube portion 8A of the second inserting portion 8, and the positioning nut 94 is used to fix the pressing nut 93 so as to press the outer surface 7a of the second inserted portion 7. The connecting bolt Ra is then tightened, and the second inserted portion 7 and the second inserting portion 8 are pulled in the joining direction of the flange portions Va and 12a to be fastened and fixed. As a result, the lower fastening mechanism Kb functions, and the pressing portion 8C of the second inserting portion 8 presses the branch flange portion 12a of the branch pipe 12 upward to function as the connecting mechanism R for preventing water leakage from the joint surface 1b of the division portion 1. Note that the pressing nut 93 and the positioning nut 94 are not limited to the pressing nut 93 and the positioning nut 94, and may be a welded piece integrated with the connecting bolt Ra, as long as they fix the position of the second inserted portion 7.

連結機構Ｒは、連結ボルトＲａを有している。位置決めナット９４により押圧ナット９３を位置決めした状態で連結ボルトＲａを締め付け、第二被挿入部７および第二挿入部８を両フランジ部Ｖａ，１２ａの接合方向に引き寄せている。そして、上側締結機構Ｋａの位置調整ナット９２を連結ボルトＲａの雄ねじ部Ｒａ２に螺合すると共に、近接ナット９１を締め付けることにより、第一挿入部５および第一被挿入部６を両フランジ部１１ａ，Ｔａの接合方向に引き寄せて締結固定する。その結果、上側挟持部材１０Ａと下側挟持部材１０Ｂとが近接移動して、補修弁ケースＸの分割部１に押圧力を付与している。また、上述したように、上側締結機構Ｋａは、連結機構Ｒの連結ボルトＲａに近接ナット９１および位置調整ナット９２を螺合して構成されており、下側締結機構Ｋｂは、連結機構Ｒの連結ボルトＲａの雄ねじ部Ｒａ２に押圧ナット９３および位置決めナット９４を螺合して構成されている。つまり、本実施形態における連結機構Ｒの連結ボルトＲａは、締結機構Ｋａ，Ｋｂと兼用されており、連結ボルトＲａを軸として、第一挿入部５および第一被挿入部６の引き寄せと、第二被挿入部７および第二挿入部８の引き寄せと、両挟持部材１０Ａ，１０Ｂの近接移動とを実行することができる。 The connecting mechanism R has a connecting bolt Ra. With the pressing nut 93 positioned by the positioning nut 94, the connecting bolt Ra is tightened to pull the second inserted portion 7 and the second inserted portion 8 in the joining direction of the flange portions Va and 12a. Then, the position adjustment nut 92 of the upper fastening mechanism Ka is screwed onto the male thread portion Ra2 of the connecting bolt Ra, and the proximity nut 91 is tightened to pull the first inserted portion 5 and the first inserted portion 6 in the joining direction of the flange portions 11a and Ta, and fasten them. As a result, the upper clamping member 10A and the lower clamping member 10B move closer to each other, applying a pressing force to the divided portion 1 of the repair valve case X. As described above, the upper fastening mechanism Ka is configured by screwing a proximity nut 91 and a position adjustment nut 92 onto the connecting bolt Ra of the connecting mechanism R, and the lower fastening mechanism Kb is configured by screwing a pressure nut 93 and a positioning nut 94 onto the male threaded portion Ra2 of the connecting bolt Ra of the connecting mechanism R. In other words, the connecting bolt Ra of the connecting mechanism R in this embodiment is used as both the fastening mechanisms Ka and Kb, and can be used as an axis to pull the first inserting portion 5 and the first inserted portion 6 together, pull the second inserted portion 7 and the second inserting portion 8 together, and move the clamping members 10A and 10B closer to each other.

図１０に示すように、間隔保持部材９は、第一挿入部５の押圧部５Ｃと第二被挿入部７の押圧部７Ｂとに亘って係止された弾性部材である。連結ボルトＲａで連結された状態の両挟持部材１０Ａ，１０Ｂを装着する際、間隔保持部材９の圧縮力により、位置調整ナット９２が第一挿入部５の外面５ａを押圧するまで第一挿入部５が引っ張られ、押圧ナット９３が第二被挿入部７の外面７ａを押圧するまで第二被挿入部７が引っ張られる。その結果、第一挿入部５の押圧部５Ｃと第一被挿入部６の押圧部６Ｂとの間隔が維持され、両フランジ部１１ａ，Ｔａの外側面１ａに対向するように、上側挟持部材１０Ａの押圧部５Ｃ，６Ｂを挿入することができる。また、第二被挿入部７の押圧部７Ｂと第二挿入部８の押圧部８Ｃとの間隔が維持され、両フランジ部Ｖａ，１２ａの外側面１ａに対向するように、下側挟持部材１０Ｂの押圧部７Ｂ，８Ｃを挿入することができる。 10, the spacing member 9 is an elastic member that is engaged across the pressing portion 5C of the first insertion portion 5 and the pressing portion 7B of the second inserted portion 7. When the two clamping members 10A, 10B connected by the connecting bolt Ra are attached, the first insertion portion 5 is pulled by the compressive force of the spacing member 9 until the position adjustment nut 92 presses the outer surface 5a of the first insertion portion 5, and the second inserted portion 7 is pulled until the pressing nut 93 presses the outer surface 7a of the second inserted portion 7. As a result, the spacing between the pressing portion 5C of the first insertion portion 5 and the pressing portion 6B of the first inserted portion 6 is maintained, and the pressing portions 5C, 6B of the upper clamping member 10A can be inserted so as to face the outer surfaces 1a of both flange portions 11a, Ta. In addition, the distance between the pressing portion 7B of the second inserted portion 7 and the pressing portion 8C of the second inserted portion 8 is maintained, and the pressing portions 7B and 8C of the lower clamping member 10B can be inserted so as to face the outer surfaces 1a of both flange portions Va and 12a.

（設置治具の基本構成）
図１１～図１２を用いて、特にマンホールＭの側壁Ｍａと補修弁ケースＸとの間隔が狭い場合に補強具Ｐを設置するための設置治具Ｅ（以下、単に「補強具Ｐの設置治具Ｅ」ともいう）の基本構成について説明する。 (Basic configuration of installation jig)
Using Figures 11 and 12, we will explain the basic configuration of an installation jig E (hereinafter simply referred to as the ``installation jig E for reinforcing tool P'') for installing a reinforcing tool P, especially when the gap between the side wall Ma of the manhole M and the repair valve case X is narrow.

設置治具Ｅは、下側挟持部材１０Ｂの背面７Ａａ（角筒部７Ａの外面７ａのうち弁箱フランジ部Ｖａとは反対側の面）に当接して下側挟持部材１０Ｂを保持する金属製の保持機構２１と、保持機構２１から上下方向に沿って延出し、保持機構２１が下側挟持部材１０Ｂを両フランジ部Ｖａ，１２ａに向かって押圧するように操作可能な金属製の棒状部材２２と、を備えている（図１３も参照）。 The installation jig E is equipped with a metal holding mechanism 21 that abuts against the back surface 7Aa of the lower clamping member 10B (the surface of the outer surface 7a of the square tube portion 7A opposite the valve box flange portion Va) to hold the lower clamping member 10B, and a metal rod-shaped member 22 that extends in the vertical direction from the holding mechanism 21 and can be operated so that the holding mechanism 21 presses the lower clamping member 10B against both flange portions Va and 12a (see also FIG. 13).

保持機構２１は、図６に示す下側挟持部材１０Ｂの背面７Ａａの台形状に沿うように、弁箱フランジ部Ｖａに近付くほど拡径する台形状の内面２１ａを含む本体部２１Ａを有している。本体部２１Ａは、下側挟持部材１０Ｂの背面７Ａａの上側を覆う背面覆部２１Ａａと、下側挟持部材１０Ｂの上面７Ａｂ（角筒部７Ａの外面７ａのうち上側挟持部材１０Ａ側の面）に当接して係止される当接係止部２１Ａｂと、が一体形成されている。また、保持機構２１には、空気（流体の一例）を噴出可能な噴出口３１ａを含む流体噴出路３１が設けられている。この流体噴出路３１は、棒状部材２２の内部を経由して保持機構２１の側面に固定されている。さらに、保持機構２１の棒状部材２２とは反対側の端部には、カッター部材３２が本体部２１Ａに一体形成されている。このカッター部材３２は、両フランジ部Ｖａ，１２ａを覆うポリスリーブを切断することができる。なお、背面覆部２１Ａａ，当接係止部２１Ａｂ及びカッター部材３２は、本体部２１Ａに一体形成せずに、別部材をボルトや接着等で固定しても良い。 The holding mechanism 21 has a main body 21A including a trapezoidal inner surface 21a that expands in diameter as it approaches the valve box flange portion Va, so as to follow the trapezoidal shape of the back surface 7Aa of the lower clamping member 10B shown in FIG. 6. The main body 21A is integrally formed with a back cover portion 21Aa that covers the upper side of the back surface 7Aa of the lower clamping member 10B and an abutment locking portion 21Ab that abuts and locks against the upper surface 7Ab of the lower clamping member 10B (the surface of the outer surface 7a of the square tube portion 7A that faces the upper clamping member 10A). In addition, the holding mechanism 21 is provided with a fluid ejection path 31 including an ejection port 31a that can eject air (an example of a fluid). This fluid ejection path 31 is fixed to the side of the holding mechanism 21 via the inside of the rod-shaped member 22. Furthermore, a cutter member 32 is integrally formed with the main body 21A at the end of the holding mechanism 21 opposite to the rod-shaped member 22. This cutter member 32 can cut the polysleeve that covers both flanges Va and 12a. Note that the back cover 21Aa, the abutting and locking portion 21Ab, and the cutter member 32 do not need to be integrally formed with the main body 21A, but may be separate members fixed with bolts, adhesives, etc.

棒状部材２２は、先端部に保持機構２１の本体部２１Ａがバンドや溶接等により固定された棒本体２２Ａと、棒本体２２Ａの延在方向とは垂直な方向に沿って棒本体２２Ａの基端部（先端部と反対側の端部）に係止された把持部２２Ｂと、を有している。把持部２２Ｂを把持した状態で棒本体２２ＡをマンホールＭの側壁Ｍａに当接させるように傾倒させることにより、保持機構２１が下側挟持部材１０Ｂを両フランジ部Ｖａ，１２ａに向かって押圧する（図１３も参照）。これにより、下側締結機構Ｋｂを締付操作する際、下側挟持部材１０Ｂの回転を防止することができる。 The rod-shaped member 22 has a rod body 22A to which the main body 21A of the holding mechanism 21 is fixed by a band, welding, or the like at its tip, and a gripping portion 22B that is engaged with the base end (the end opposite the tip) of the rod body 22A along a direction perpendicular to the extension direction of the rod body 22A. By tilting the rod body 22A so that it abuts against the side wall Ma of the manhole M while gripping the gripping portion 22B, the holding mechanism 21 presses the lower clamping member 10B toward both flange portions Va and 12a (see also FIG. 13). This makes it possible to prevent the lower clamping member 10B from rotating when the lower fastening mechanism Kb is tightened.

続いて、設置治具Ｅを用いた補強具Ｐの設置方法について、図１３～図１６を用いて説明する。 Next, the method for installing the reinforcing member P using the installation jig E will be explained with reference to Figures 13 to 16.

まず、事前準備として、補修弁ケースＸのフランジ部１１ａ，Ｔａ，Ｖａ，１２ａを覆うポリスリーブがある場合は、設置治具ＥをマンホールＭと補修弁ケースＸとの間に挿入して、保持機構２１の端部に形成されたカッター部材３２によりポリスリーブを切断する。そして、補修弁ケースＸを覆っているポリスリーブを除去する。また、補修弁ケースＸのフランジ部１１ａ，Ｔａ，Ｖａ，１２ａに泥等が付着している場合は、保持機構２１の噴出口３１ａから空気を噴出させて、泥等を除去する。 First, as a preliminary step, if there is a polysleeve covering the flanges 11a, Ta, Va, and 12a of the repair valve case X, the installation jig E is inserted between the manhole M and the repair valve case X, and the polysleeve is cut with the cutter member 32 formed at the end of the holding mechanism 21. Then, the polysleeve covering the repair valve case X is removed. Also, if mud or the like is attached to the flanges 11a, Ta, Va, and 12a of the repair valve case X, air is sprayed from the nozzle 31a of the holding mechanism 21 to remove the mud or the like.

図１３に示すように、位置調整ナット９２，押圧ナット９３および位置決めナット９４を螺合した状態の連結ボルトＲａの雄ねじ部Ｒａ２を、下側挟持部材１０Ｂの第二挿入部８の雌ねじ部８ｆに螺合して仮止めする（第一工程、図１０も参照）。また、第二被挿入部７の外面７ａを押圧ナット９３が押圧している状態で、位置決めナット９４により押圧ナット９３が移動しないように予め位置固定している。そして、この連結ボルトＲａの雄ねじ部Ｒａ２に上側挟持部材１０Ａを挿入し、近接ナット９１を螺合する（第一工程）。
同時に、第一挿入部５の押圧部５Ｃと第二被挿入部７の押圧部７Ｂとに亘って間隔保持部材９を装着する。このとき、第一被挿入部６の押圧部６Ｂと第二挿入部８の押圧部８Ｃとの間隔は、接続フランジ部１１ａと分岐フランジ部１２ａとの間隔以上となるように、近接ナット９１が第一被挿入部６の外面６ａから離間している。また、位置調整ナット９２が第一挿入部５の外面５ａを押圧することにより第一被挿入部６の押圧部６Ｂと第一挿入部５の押圧部５Ｃとの間隔が維持されており、押圧ナット９３が第二被挿入部７の外面７ａを押圧することにより第二被挿入部７の押圧部７Ｂと第二挿入部８の押圧部８Ｃとの間隔が維持されている。このように、連結機構Ｒ，上側締結機構Ｋａおよび下側締結機構Ｋｂが仮止めされた状態の上側挟持部材１０Ａと下側挟持部材１０Ｂとを、夫々両フランジ部１１ａ，Ｔａと両フランジ部Ｖａ，１２ａに対向する位置まで近接移動させる。 As shown in Fig. 13, the male threaded portion Ra2 of the connecting bolt Ra with the position adjustment nut 92, the pressure nut 93, and the positioning nut 94 screwed in is screwed into the female threaded portion 8f of the second insertion portion 8 of the lower clamping member 10B for temporary fixing (first step, also see Fig. 10). In addition, with the pressure nut 93 pressing the outer surface 7a of the second inserted portion 7, the pressure nut 93 is preliminarily fixed in position by the positioning nut 94 so as not to move. Then, the upper clamping member 10A is inserted into the male threaded portion Ra2 of the connecting bolt Ra, and the proximity nut 91 is screwed in (first step).
At the same time, a spacing member 9 is attached across the pressing portion 5C of the first insertion portion 5 and the pressing portion 7B of the second inserted portion 7. At this time, the proximity nut 91 is spaced from the outer surface 6a of the first inserted portion 6 so that the distance between the pressing portion 6B of the first inserted portion 6 and the pressing portion 8C of the second inserted portion 8 is equal to or greater than the distance between the connection flange portion 11a and the branch flange portion 12a. In addition, the position adjustment nut 92 presses the outer surface 5a of the first inserted portion 5 to maintain the distance between the pressing portion 6B of the first inserted portion 6 and the pressing portion 5C of the first inserted portion 5, and the pressing nut 93 presses the outer surface 7a of the second inserted portion 7 to maintain the distance between the pressing portion 7B of the second inserted portion 7 and the pressing portion 8C of the second inserted portion 8. In this manner, the upper clamping member 10A and the lower clamping member 10B, with the connecting mechanism R, the upper fastening mechanism Ka and the lower fastening mechanism Kb temporarily fastened, are moved close to positions facing both flange portions 11a, Ta and both flange portions Va, 12a, respectively.

次いで、第二被挿入部７の押圧部７Ｂを弁箱フランジ部Ｖａの外側面１ａに当接させた状態で、第一被挿入部６の押圧部６Ｂを接続フランジ部１１ａの外側面１ａに当接させる（第二工程）。また、第一被挿入部６の押圧部６Ｂを接続フランジ部１１ａの外側面１ａに当接させるとき、第一被挿入部６の押圧部６Ｂを上下に移動させながら位置調整する。
次いで、マンホールＭの側壁Ｍａと両挟持部材１０Ａ，１０Ｂとの隙間から設置治具Ｅを挿入し、保持機構２１の当接係止部２１Ａｂが下側挟持部材１０Ｂの上面７Ａｂに当接するように、設置治具Ｅを下側挟持部材１０Ｂに装着する（第三工程）。次いで、把持部２２Ｂを把持した状態で棒本体２２ＡをマンホールＭの側壁Ｍａに当接させるように傾倒させることにより、保持機構２１が弁箱フランジ部Ｖａに向かって下側挟持部材１０Ｂを押圧する（第三工程）。次いで、図１４に示すように、棒本体２２ＡをマンホールＭの側壁Ｍａに当接させた状態で、且つ押圧ナット９３が第二被挿入部７の外面７ａを押圧している状態で、連結ボルトＲａを締め付けることにより、連結ボルトＲａの雄ねじ部Ｒａ２を第二挿入部８の雌ねじ部８ｆに螺合させて、第二挿入部８を第二被挿入部７に引き寄せ固定する（第四工程、図１０も参照）。このとき、ラチェットレンチＬ等の工具を用いて連結ボルトＲａの頭部Ｒａ１を締め付けることで第二挿入部８が上側に移動し、分岐フランジ部１２ａの外側面１ａには第二挿入部８の押圧部８Ｃから上向きの力が作用するため、上側挟持部材１０Ａと下側挟持部材１０Ｂとが近接移動する。これにより、両フランジ部Ｖａ，１２ａの接合面１ｂからの漏水を防止すると共に、分割部１の接合面１ｂからの漏水を防止することができる。このように、本実施形態では、連結ボルトＲａの頭部Ｒａ１を上側から操作可能な工具を用いて締め付けることで、連結機構Ｒの機能と下側締結機構Ｋｂの機能とを同時に実行できるため、補修弁ケースＸと補修弁ケースＸを収容しているマンホールＭとの隙間が小さい場合でもマンホールＭを取り壊す必要がなく、効率的である。また、上側挟持部材１０Ａと下側挟持部材１０Ｂとの距離が離れている場合でも、上側挟持部材１０Ａや下側挟持部材１０Ｂの寸法を変更する必要がなく、連結ボルトＲａの寸法のみを変更すれば良い。しかも、マンホールＭの側壁Ｍａに棒状部材２２を当接させるように傾倒させれば、てこの原理により保持機構２１が下側挟持部材１０Ｂを弁箱フランジ部Ｖａに向かって押圧する。その結果、下側締結機構Ｋｂの締付け作業をする際、設置治具Ｅの姿勢が安定するため、作業効率を更に高めることができる。 Next, with the pressing portion 7B of the second inserted portion 7 in contact with the outer surface 1a of the valve box flange portion Va, the pressing portion 6B of the first inserted portion 6 is brought into contact with the outer surface 1a of the connection flange portion 11a (second step). When the pressing portion 6B of the first inserted portion 6 is brought into contact with the outer surface 1a of the connection flange portion 11a, the position of the pressing portion 6B of the first inserted portion 6 is adjusted by moving it up and down.
Next, the installation jig E is inserted through the gap between the side wall Ma of the manhole M and both clamping members 10A, 10B, and the installation jig E is attached to the lower clamping member 10B so that the abutment locking portion 21Ab of the holding mechanism 21 abuts against the upper surface 7Ab of the lower clamping member 10B (third step). Next, while holding the gripping portion 22B, the rod body 22A is tilted so as to abut against the side wall Ma of the manhole M, whereby the holding mechanism 21 presses the lower clamping member 10B against the valve box flange portion Va (third step). Next, as shown in Fig. 14, with the rod body 22A in contact with the side wall Ma of the manhole M and with the pressing nut 93 pressing the outer surface 7a of the second inserted portion 7, the connecting bolt Ra is tightened to screw the male threaded portion Ra2 of the connecting bolt Ra into the female threaded portion 8f of the second inserted portion 8, and the second inserted portion 8 is pulled and fixed to the second inserted portion 7 (fourth step, also see Fig. 10). At this time, the head Ra1 of the connecting bolt Ra is tightened using a tool such as a ratchet wrench L, so that the second inserted portion 8 moves upward, and an upward force is applied to the outer surface 1a of the branch flange portion 12a from the pressing portion 8C of the second inserted portion 8, so that the upper clamping member 10A and the lower clamping member 10B move closer to each other. This prevents water leakage from the joint surface 1b of both flange portions Va, 12a and prevents water leakage from the joint surface 1b of the division portion 1. In this embodiment, the head Ra1 of the connecting bolt Ra is fastened using a tool that can be operated from above, so that the function of the connecting mechanism R and the function of the lower fastening mechanism Kb can be performed simultaneously. Therefore, even if the gap between the repair valve case X and the manhole M that houses the repair valve case X is small, there is no need to demolish the manhole M, which is efficient. In addition, even if the distance between the upper clamping member 10A and the lower clamping member 10B is large, there is no need to change the dimensions of the upper clamping member 10A or the lower clamping member 10B, and only the dimensions of the connecting bolt Ra need to be changed. Moreover, if the rod-shaped member 22 is tilted so as to abut against the side wall Ma of the manhole M, the holding mechanism 21 presses the lower clamping member 10B toward the valve box flange portion Va by the principle of leverage. As a result, the posture of the installation jig E is stable when the lower fastening mechanism Kb is fastened, so that the work efficiency can be further improved.

次いで、図１５に示すように、設置治具Ｅを取り外し、上側から手動により第一挿入部５の外面５ａを押圧している位置調整ナット９２を回転させて第一挿入部５の押圧部５Ｃを短管フランジ部Ｔａの外側面１ａに当接させる（第五工程）。この位置調整ナット９２の回転操作は、マンホールＭの上部から手を挿入することで容易に行うことができる。次いで、ラチェットレンチやスパナ等の工具（不図示）を用いて近接ナット９１を締め付けて、第一被挿入部６を第一挿入部５に引き寄せ固定する（第五工程）。このとき、工具を用いて近接ナット９１を締め付けることで第一被挿入部６が下側に移動し、接続フランジ部１１ａの外側面１ａには第一被挿入部６の押圧部６Ｂから下向きの力が作用するため、上側挟持部材１０Ａと下側挟持部材１０Ｂとが近接移動すると共に、分割部１を閉じる方向の力が作用する。これにより、両フランジ部Ｖａ，１２ａの接合面１ｂからの漏水を防止すると共に、分割部１の接合面１ｂからの漏水を防止することができる。本実施形態では、連結ボルトＲａの雄ねじ部Ｒａ２に螺合した近接ナット９１を上側から操作可能な工具を用いて締め付けることで、上側締結機構Ｋａを機能させることができるため、補修弁ケースＸとマンホールＭとの隙間が小さい場合でもマンホールＭを取り壊す必要がない。 15, the installation jig E is removed, and the position adjustment nut 92, which is pressing the outer surface 5a of the first insertion portion 5, is rotated manually from above to bring the pressing portion 5C of the first insertion portion 5 into contact with the outer surface 1a of the short pipe flange portion Ta (fifth step). The position adjustment nut 92 can be easily rotated by inserting a hand from the top of the manhole M. Next, the proximity nut 91 is tightened using a tool such as a ratchet wrench or a spanner (not shown) to pull and fix the first insertion portion 6 to the first insertion portion 5 (fifth step). At this time, the first insertion portion 6 moves downward by tightening the proximity nut 91 using a tool, and a downward force is applied to the outer surface 1a of the connection flange portion 11a from the pressing portion 6B of the first insertion portion 6, so that the upper clamping member 10A and the lower clamping member 10B move closer to each other, and a force in the direction of closing the division portion 1 is applied. This prevents water leakage from the joint surface 1b of both flange portions Va and 12a, and also prevents water leakage from the joint surface 1b of the divided portion 1. In this embodiment, the upper fastening mechanism Ka can be made to function by tightening the proximity nut 91 screwed onto the male thread portion Ra2 of the connecting bolt Ra using a tool that can be operated from above, so there is no need to demolish the manhole M even if the gap between the repair valve case X and the manhole M is small.

このように、本実施形態では、連結機構Ｒの連結ボルトＲａを上側締結機構Ｋａおよび下側締結機構Ｋｂに兼用しているので、上側締結機構Ｋａおよび下側締結機構Ｋｂを引き寄せ固定するボルトを別途設ける必要がなく、部品点数を節約して製造コストを節約できると共に、補強具Ｐをコンパクトに構成できる。 In this way, in this embodiment, the connecting bolt Ra of the connecting mechanism R is used for both the upper fastening mechanism Ka and the lower fastening mechanism Kb, so there is no need to provide a separate bolt to attract and fasten the upper fastening mechanism Ka and the lower fastening mechanism Kb, which reduces the number of parts and manufacturing costs, and allows the reinforcement tool P to be configured compactly.

また、上側挟持部材１０Ａにおける第一挿入部５の第一被挿入部６に対する挿入方向や下側挟持部材１０Ｂにおける第二挿入部８の第二被挿入部７に対する挿入方向は、連結機構Ｒによる上側挟持部材１０Ａと下側挟持部材１０Ｂとの近接移動方向（上下方向）と同方向であるため、該同方向による作業が多くなり、マンホールＭと補修弁ケースＸとの隙間が小さい場合でもマンホールＭを取り壊す必要がない。 In addition, the direction of insertion of the first inserting portion 5 of the upper clamping member 10A into the first inserted portion 6 and the direction of insertion of the second inserting portion 8 of the lower clamping member 10B into the second inserted portion 7 are the same as the direction of approaching movement (up and down) of the upper clamping member 10A and the lower clamping member 10B by the connecting mechanism R, so there is more work in the same direction, and even if the gap between the manhole M and the repair valve case X is small, there is no need to demolish the manhole M.

しかも、本実施形態では、上側挟持部材１０Ａが下側挟持部材１０Ｂよりも上側にあり、第一被挿入部６が第一挿入部５よりも上側にあり、第二被挿入部７が第二挿入部８よりも上側にある。この配置により、連結ボルトＲａを上側から工具により回転操作することで連結機構Ｒおよび下側締結機構Ｋｂを機能させることが可能となり、近接ナット９１を上側から工具により回転操作することで上側締結機構Ｋａを機能させることが可能となる。また、連結ボルトＲａを操作することにより第二挿入部８の押圧部８Ｃから上向きの力が作用し、近接ナット９１を操作することにより第一被挿入部６の押圧部６Ｂから下向きの力が作用し、これらは分割部１を閉じる方向の力であるため、作業中に分割部１の接合面１ｂを誤って広げることもない。つまり、連結機構Ｒ，上側締結機構Ｋａおよび下側締結機構Ｋｂを全て上側から操作することが可能となるため、補修弁ケースＸを収容しているマンホールＭと補修弁ケースＸとの間隔が狭い場合でも、補強具Ｐを正しく装着することができる。よって、補強具Ｐの装着にあたってマンホールＭを取り壊す必要がなく、作業効率を高めることができる。 Moreover, in this embodiment, the upper clamping member 10A is above the lower clamping member 10B, the first inserted portion 6 is above the first inserted portion 5, and the second inserted portion 7 is above the second inserted portion 8. This arrangement makes it possible to operate the connecting mechanism R and the lower fastening mechanism Kb by rotating the connecting bolt Ra from above with a tool, and to operate the upper fastening mechanism Ka by rotating the adjacent nut 91 from above with a tool. In addition, by operating the connecting bolt Ra, an upward force is applied from the pressing portion 8C of the second inserted portion 8, and by operating the adjacent nut 91, a downward force is applied from the pressing portion 6B of the first inserted portion 6. These are forces in the direction of closing the divided portion 1, so the joint surface 1b of the divided portion 1 is not inadvertently widened during the operation. In other words, since the connecting mechanism R, the upper fastening mechanism Ka, and the lower fastening mechanism Kb can all be operated from above, the reinforcing tool P can be installed correctly even if the distance between the manhole M housing the repair valve case X and the repair valve case X is narrow. Therefore, there is no need to dismantle the manhole M to install the reinforcing tool P, which improves work efficiency.

本実施形態の設置治具Ｅは、下側挟持部材１０Ｂの背面７Ａａに当接して下側挟持部材１０Ｂを保持する保持機構２１と、保持機構２１から上下方向に延出する棒状部材２２とを備えている。これにより、下側挟持部材１０Ｂをフランジ部Ｖａ，１２ａに装着する際、保持機構２１を下側挟持部材１０Ｂに当接させた状態で棒状部材２２を操作することにより、保持機構２１が下側挟持部材１０Ｂを押圧する。その結果、下側締結機構Ｋｂを操作して下側挟持部材１０Ｂをフランジ部Ｖａ，１２ａに本固定するとき、下側挟持部材１０Ｂが回転することを防止できる。 The installation jig E of this embodiment includes a holding mechanism 21 that abuts against the back surface 7Aa of the lower clamping member 10B to hold the lower clamping member 10B, and a rod-shaped member 22 that extends vertically from the holding mechanism 21. As a result, when the lower clamping member 10B is attached to the flange portions Va, 12a, the holding mechanism 21 presses the lower clamping member 10B by operating the rod-shaped member 22 with the holding mechanism 21 abutting against the lower clamping member 10B. As a result, when the lower fastening mechanism Kb is operated to finally fix the lower clamping member 10B to the flange portions Va, 12a, the lower clamping member 10B can be prevented from rotating.

また、設置治具Ｅは保持機構２１と棒状部材２２とで構成されているため、マンホールＭの側壁Ｍａと補修弁ケースＸとの間隔が狭い場合でも、棒状部材２２を把持した状態で該間隔に設置治具Ｅを挿入することが可能となる。その結果、フランジ部１１ａ，Ｔａ，Ｖａ，１２ａの周辺環境に左右されず、補強具Ｐを作業効率良く設置することができる。 In addition, since the installation jig E is composed of a holding mechanism 21 and a rod-shaped member 22, even if the gap between the side wall Ma of the manhole M and the repair valve case X is narrow, it is possible to insert the installation jig E into the gap while holding the rod-shaped member 22. As a result, the reinforcing member P can be installed efficiently without being affected by the surrounding environment of the flange portions 11a, Ta, Va, and 12a.

本実施形態の保持機構２１のように、下側挟持部材１０Ｂの上面７Ａｂに当接する当接係止部２１Ａｂを有していれば、上方から設置治具Ｅを下側挟持部材１０Ｂに当接させることが可能となるため、作業効率を更に高めることができる。また、噴出口３１ａを保持機構２１に設ければ、フランジ部１１ａ，Ｔａ，Ｖａ，１２ａに付着した泥等を空気により吹き飛ばして洗浄することができる。この噴出口３１ａを保持機構２１に設けているため、作業効率が高い。さらに、設置治具Ｅにカッター部材３２を設けていれば、フランジ部１１ａ，Ｔａ，Ｖａ，１２ａにビニールカバー（ポリスリーブ）が設けてある場合でも、カッター部材３２により切断すれば、補強具Ｐを設置することが可能となる。このカッター部材３２を保持機構２１に設けているため、作業効率が高い。 If the holding mechanism 21 of this embodiment has an abutting engagement portion 21Ab that abuts against the upper surface 7Ab of the lower clamping member 10B, the installation jig E can be abutted against the lower clamping member 10B from above, which further improves work efficiency. In addition, if the holding mechanism 21 is provided with a jetting nozzle 31a, mud and the like adhering to the flange portions 11a, Ta, Va, and 12a can be blown off and cleaned with air. Since the jetting nozzle 31a is provided in the holding mechanism 21, work efficiency is high. Furthermore, if the installation jig E is provided with a cutter member 32, even if a vinyl cover (polyester sleeve) is provided on the flange portions 11a, Ta, Va, and 12a, it is possible to install the reinforcing tool P by cutting it with the cutter member 32. Since the cutter member 32 is provided in the holding mechanism 21, work efficiency is high.

なお、上側挟持部材１０Ａにあっては、第一挿入部５が第一被挿入部６よりも上側にあるように構成しても良い。本構成においても、近接ナット９１を締め付けることにより、第一挿入部５と第一被挿入部６とが引き寄せられる。この場合でも、上述した実施形態における作用効果を奏することができる。 The upper clamping member 10A may be configured so that the first inserting portion 5 is located above the first inserted portion 6. In this configuration, the first inserting portion 5 and the first inserted portion 6 are drawn together by tightening the proximity nut 91. Even in this case, the effects of the above-described embodiment can be achieved.

以下、別実施形態に係る補強具Ｐについて、上述した実施形態と異なる構成のみ説明する。なお、図面の理解を容易にするため、上述した実施形態と同じ部材名称および符号を用いて説明する。 Below, we will explain the reinforcing tool P according to another embodiment, with only the configuration different from the embodiment described above. Note that to make it easier to understand the drawings, we will use the same component names and symbols as the embodiment described above.

［別実施形態１］
図１６に示すように、下側挟持部材１０Ｂを上側挟持部材１０Ａと同一の構成としても良い。この場合、下側挟持部材１０Ｂは、上側挟持部材１０Ａを上下反転させた状態となっている。つまり、下側挟持部材１０Ｂは、弁箱Ｖの弁箱フランジ部Ｖａの外側面１ａにおいて、周方向に隣り合う２つのナット４２ｂの間の領域を押圧する２つの押圧部６Ｂを有する第一被挿入部６と、分岐管１２の分岐フランジ部１２ａの外側面１ａにおいて、周方向に隣り合う２つのボルト４２ａの頭部の間の領域を押圧する２つの押圧部５Ｃを有する第一挿入部５と、を備えている。また、下側締結機構Ｋｂは、連結ボルトＲａと近接ナット９１と位置調整ナット９２とを有している。なお、本実施形態における連結ボルトＲａは、寸切ボルトを採用しているが頭部を有するボルトを採用しても良い。 [Another embodiment 1]
As shown in FIG. 16, the lower clamping member 10B may have the same configuration as the upper clamping member 10A. In this case, the lower clamping member 10B is in a state where the upper clamping member 10A is turned upside down. That is, the lower clamping member 10B includes a first inserted portion 6 having two pressing portions 6B that press the area between two circumferentially adjacent nuts 42b on the outer surface 1a of the valve box flange portion Va of the valve box V, and a first inserted portion 5 having two pressing portions 5C that press the area between the heads of two circumferentially adjacent bolts 42a on the outer surface 1a of the branch flange portion 12a of the branch pipe 12. The lower fastening mechanism Kb includes a connecting bolt Ra, a proximity nut 91, and a position adjustment nut 92. In this embodiment, a cut-to-length bolt is used as the connecting bolt Ra, but a bolt having a head may be used.

本実施形態では、連結ボルトＲａの雄ねじ部Ｒａ２に螺合した下側挟持部材１０Ｂの近接ナット９１を工具を用いて締め付けるとき、側方からの操作が必要となるが、補修弁ケースＸとマンホールＭとの間に十分な空間があれば問題が無い。 In this embodiment, when using a tool to tighten the proximity nut 91 of the lower clamping member 10B that is screwed onto the male threaded portion Ra2 of the connecting bolt Ra, operation from the side is required, but this is not a problem as long as there is sufficient space between the repair valve case X and the manhole M.

別実施形態１の変形例として、下側挟持部材１０Ｂの近接ナット９１を回転不能に収容する六角凹部を第一挿入部５に設けても良い。この場合、上述した実施形態と同様に、連結機構Ｒ，上側締結機構Ｋａおよび下側締結機構Ｋｂを全て上側から操作することが可能となる。また、第一挿入部５及び第一被挿入部６を回転不能な多角形状に構成したが、円柱状に構成して回り止め突起等を設けても良い。 As a modification of the alternative embodiment 1, the first inserting portion 5 may be provided with a hexagonal recess that non-rotatably accommodates the proximity nut 91 of the lower clamping member 10B. In this case, as in the above-described embodiment, the connecting mechanism R, the upper fastening mechanism Ka, and the lower fastening mechanism Kb can all be operated from above. In addition, while the first inserting portion 5 and the first inserted portion 6 are configured in a non-rotatable polygonal shape, they may also be configured in a cylindrical shape and provided with anti-rotation protrusions or the like.

［別実施形態２］
図１７に示すように、保持機構２１は、下側挟持部材１０Ｂ（挟持部材の一例）と、弁箱フランジ部Ｖａ（フランジ部の一例）との空間に挿入される挿入突起２３とを有している。この挿入突起２３には、棒状部材２２の外側への移動により該空間に対する挿入状態を解除可能なヒンジ２３ａが設けられている。本実施形態では、挿入突起２３により下側挟持部材１０Ｂを吊り下げることが可能となるため、設置治具Ｅにより保持した補強具Ｐをフランジ部１１ａ，Ｔａ，Ｖａ，１２ａに取付け、棒状部材２２の操作により下側挟持部材１０Ｂの回転を防止しながら下側締結機構Ｋｂを締結することができる。そして、棒状部材２２を外側に移動すれば挿入突起２３の挿入状態が解除されるため、設置治具Ｅを取外すことが可能となる。よって、作業効率を更に高めることができる。 [Another embodiment 2]
As shown in FIG. 17, the holding mechanism 21 has an insertion protrusion 23 inserted into the space between the lower clamping member 10B (an example of a clamping member) and the valve box flange portion Va (an example of a flange portion). The insertion protrusion 23 is provided with a hinge 23a that can release the inserted state into the space by moving the rod-shaped member 22 outward. In this embodiment, since the insertion protrusion 23 allows the lower clamping member 10B to be suspended, the reinforcing tool P held by the installation jig E can be attached to the flange portions 11a, Ta, Va, and 12a, and the lower fastening mechanism Kb can be fastened while preventing the lower clamping member 10B from rotating by operating the rod-shaped member 22. Then, by moving the rod-shaped member 22 outward, the insertion state of the insertion protrusion 23 is released, so that the installation jig E can be removed. This further improves the work efficiency.

［その他の実施形態］
（１）保持機構２１のうち、背面覆部２１Ａａ、当接係止部２１Ａｂ、カッター部材３２及び流体噴出路３１の少なくとも何れか１つを省略しても良い。
（２）連結ボルトＲａは、雄ねじ部Ｒａ２よりも径内方向に引退した頭部Ｒａ１に限定されず、雄ねじ部Ｒａ２よりも径外方向に突出した頭部Ｒａ１であっても良い。
（３）２つの押圧部５Ｃ，６Ｂ，７Ｂ，８Ｃの間に、ボルト４１ａ，４２ａ又はナット４１ｂ，４２ｂが配置されるように、挟持部材１０Ａ，１０Ｂを配置しても良い。つまり、ボルト４１ａ，４２ａ又はナット４１ｂ，４２ｂの両側に２つの押圧部５Ｃ，６Ｂ，７Ｂ，８Ｃが配置されることとなる。
（４）挟持部材１０Ａ，１０Ｂの押圧部５Ｃ，６Ｂ，７Ｂ，８Ｃは、二股状に形成されたものに限定されず、単一の押圧部で構成しても良い。
（５）補強具Ｐは、両フランジ部１１ａ，Ｔａおよび両フランジ部Ｖａ，１２ａに装着される上側挟持部材１０Ａおよび下側挟持部材１０Ｂの何れか一方で構成しても良い。
（６）補強具Ｐは、補修弁ケースＸに用いる場合に限定されず、分割部１を有さない配管どうし、流体機器どうし、又は流体機器と配管の接合部に装着しても良く、あらゆる接合部からの漏水を防止するために用いることができる。また、補強具Ｐを、接合部からの漏水を防止するために用いる場合に限定されず、接合部から他の液体や気体の漏出を防止するために用いても良い。 [Other embodiments]
(1) Of the holding mechanism 21, at least one of the rear cover portion 21Aa, the abutting engagement portion 21Ab, the cutter member 32, and the fluid ejection path 31 may be omitted.
(2) The connecting bolt Ra is not limited to a head Ra1 that is recessed radially inward from the male thread portion Ra2, but may have a head Ra1 that protrudes radially outward from the male thread portion Ra2.
(3) The clamping members 10A and 10B may be disposed so that the bolts 41a and 42a or the nuts 41b and 42b are disposed between two pressing portions 5C, 6B, 7B and 8C. In other words, two pressing portions 5C, 6B, 7B and 8C are disposed on both sides of the bolts 41a and 42a or the nuts 41b and 42b.
(4) The pressing portions 5C, 6B, 7B, and 8C of the clamping members 10A and 10B are not limited to being bifurcated, and may be formed as a single pressing portion.
(5) The reinforcing member P may be composed of either the upper clamping member 10A or the lower clamping member 10B attached to both flange portions 11a, Ta and both flange portions Va, 12a.
(6) The reinforcing tool P is not limited to use with the repair valve case X, but may be attached to the joint between pipes that do not have a dividing section 1, between fluid devices, or between a fluid device and a pipe, and can be used to prevent water leakage from any joint. In addition, the reinforcing tool P is not limited to use for preventing water leakage from a joint, but may be used for preventing leakage of other liquids or gases from a joint.

本発明は、対向する一対のフランジ部を上下方向に挟持する挟持部材と、挟持部材を上下方向に沿って締結する締結機構とを備えたフランジ補強具の設置治具およびフランジ補強具の設置方法に利用可能である。 The present invention can be used in a flange reinforcement installation jig and a flange reinforcement installation method that includes a clamping member that clamps a pair of opposing flange portions in the vertical direction and a fastening mechanism that fastens the clamping member in the vertical direction.

１ａ ：外側面
６Ｂ ：押圧部（第二押圧部）
７Ａａ ：背面
７Ａｂ ：上面
７Ｂ ：押圧部（第一押圧部）
１０Ａ ：上側挟持部材（第二の挟持部材）
１０Ｂ ：下側挟持部材（挟持部材、第一の挟持部材）
１１ａ ：接続フランジ部（第二のフランジ部）
１２ａ ：分岐フランジ部（フランジ部、第一のフランジ部）
２１ ：保持機構
２１Ａｂ：当接係止部
２２ ：棒状部材
２３ ：挿入突起
３１ａ ：噴出口
３２ ：カッター部材
Ｅ ：設置治具
Ｋａ ：上側締結機構（第二の締結機構）
Ｋｂ ：下側締結機構（第一の締結機構）
Ｐ ：補強治具（フランジ補強具）
Ｒａ ：連結ボルト
Ｔａ ：短管フランジ部（第二のフランジ部）
Ｖａ ：弁箱フランジ部（第一のフランジ部） 1a: Outer surface 6B: Pressing portion (second pressing portion)
7Aa: Back surface 7Ab: Top surface 7B: Pressing portion (first pressing portion)
10A: Upper clamping member (second clamping member)
10B: Lower clamping member (clamping member, first clamping member)
11a: Connection flange portion (second flange portion)
12a: Branch flange portion (flange portion, first flange portion)
21: Holding mechanism 21Ab: Contact locking portion 22: Rod-shaped member 23: Insertion projection 31a: Spout port 32: Cutter member E: Installation jig Ka: Upper fastening mechanism (second fastening mechanism)
Kb: Lower fastening mechanism (first fastening mechanism)
P: Reinforcement jig (flange reinforcement)
Ra: Connecting bolt Ta: Short pipe flange portion (second flange portion)
Va: valve body flange portion (first flange portion)

Claims (4)

対向する一対の第一フランジ部を上下方向に挟持する下側挟持部材と、前記第一フランジ部よりも上方に位置し対向する一対の第二フランジ部を前記上下方向に挟持する上側挟持部材と、前記上側挟持部材と前記下側挟持部材を前記上下方向に沿って締結する締結機構と、を備えたフランジ補強具の設置方法であって、
前記下側挟持部材及び前記上側挟持部材は夫々、第一分割体と、前記第一分割体に接続された第二分割体と、を有しており、
前記下側挟持部材及び前記上側挟持部材を前記第一フランジ部又は前記第二フランジ部に側方から当接させた状態で、地上から保持治具を操作して、前記保持治具の当接係止部を前記下側挟持部材の上面に当接させた状態で前記下側挟持部材を前記第一フランジ部に向かって押圧して保持する保持工程と、
前記保持治具により前記下側挟持部材を保持した状態で、上方から前記締結機構を締付ける締結工具を挿入して操作することにより、前記上側挟持部材と前記下側挟持部材とを締結させる締結工程と、を含むフランジ補強具の設置方法。 A method for installing a flange reinforcing tool comprising: a lower clamping member that clamps a pair of opposing first flange portions in a vertical direction; an upper clamping member that clamps a pair of opposing second flange portions located above the first flange portions in the vertical direction; and a fastening mechanism that fastens the upper clamping member and the lower clamping member along the vertical direction,
Each of the lower clamping member and the upper clamping member has a first division body and a second division body connected to the first division body,
a holding process in which, with the lower clamping member and the upper clamping member abutting against the first flange portion or the second flange portion from the sides, a holding jig is operated from the ground to press the lower clamping member against the first flange portion while the abutting and locking portion of the holding jig abuts against an upper surface of the lower clamping member ;
a fastening process for fastening the upper clamping member and the lower clamping member together by inserting and operating a fastening tool that tightens the fastening mechanism from above while the lower clamping member is held by the holding jig. 前記締結機構は、ボルト及びナットを有する請求項１に記載のフランジ補強具の設置方法。 The method for installing a flange reinforcement according to claim 1, wherein the fastening mechanism includes a bolt and a nut. 前記締結工程は、前記下側挟持部材と前記上側挟持部材を近接移動させる請求項２に記載のフランジ補強具の設置方法。 The method for installing a flange reinforcement according to claim 2, wherein the fastening step involves moving the lower clamping member and the upper clamping member closer to each other. 前記フランジ補強具は、前記下側挟持部材と前記上側挟持部材との間に間隔保持部材を更に備えた請求項３に記載のフランジ補強具の設置方法。 The method for installing a flange reinforcement according to claim 3, wherein the flange reinforcement further comprises a spacing member between the lower clamping member and the upper clamping member.
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